ЖИДКОСТНЫЙ КОЛЬЦЕВОЙ НАСОС И СПОСОБ ПРИВЕДЕНИЯ В ДЕЙСТВИЕ ЖИДКОСТНОГО КОЛЬЦЕВОГО НАСОСА

Группа изобретений относится к жидкостному кольцевому насосу (1) для создания вакуума и для выкачивания потока бытовых сточных вод из вакуумной канализационной системы. Жидкостный кольцевой насос содержит в направлении потока бытовых сточных вод входное отверстие (11) насоса, камеру (13) всасывания, корпус 14 насоса, содержащий ротор (15), расположенный на приводном валу (16), имеющем механическое уплотнение (20), выходную камеру (17) и выходное отверстие (19) насоса. Механическое уплотнение (20) расположено внутри выходной камеры (17). Выходная камера (17) содержит выполненную как одно целое выступающую часть (18), обеспечивающую увеличение выходной камеры (17) для удержания потока бытовых сточных вод в выходной камере (17) до выгрузки его из выходного отверстия (19) насоса для улучшения смазки механического уплотнения (20). Изобретение направлено на создание жидкостного кольцевого насоса с увеличенным сроком службы. 2 н. и 10 з.п. ф-лы, 6 ил.

УСТАНОВКА ВАКУУМ-КОМПРЕССОРА

Данная полезная модель относится к гидравлическим машинам объемного вытеснения с вращающимися или качающимися рабочими органами, а именно, к роторным машинам и компрессорам с жидкостным кольцом. Установка вакуум-компрессора ВК-6М2М (ВК-12М2) предназначена для создания вакуума или небольшого избыточного давления в закрытых аппаратах и применяется для выгрузки сыпучих материалов и жидкостей, в том числе и в составе муковозов, цементовозов и т.д. Установки вакуум-компрессора изготавливаются из серого чугуна и сталей обычных марок. Тип установки вакуум-компрессора жидкостно-кольцевой, простого действия, с осевым направлением газа. В качестве рабочей жидкости по замкнутой системе используются индустриальные масла И-20А, Й-ЗОА, И-40А, И-50А летом и И-12А зимой. В состав установки вакуум-компрессора входят: компрессор в сборе с маслоотделителем и электродвигатель, установленные на две опоры и объединенные корпусом соединительным, валы которых соединены упругой муфтой, воздухоохладитель. Основные ...

СПИРАЛЬНЫЙ КОМПРЕССОР

Полезная модель относится к спиральным роторным машинам. Спиральный компрессор содержит цилиндрический корпус, в котором установлены неорбитальный спиральный элемент с возможностью осевого перемещения вдоль корпуса под воздействием давления и орбитальный спиральный элемент, взаимодействующий с неорбитальным спиральным элементом с образованием камер сжатия. Каждый упомянутый спиральный элемент включает торцевой диск с размещенной на нем спиралью. В пазах, выполненных на свободных торцах спиралей, размещены торцевые уплотнители, которые выступают из паза. При этом торцевые уплотнители выполнены из фторопластовой композиции. Технический результат - повышение эффективности работы спирального компрессора. 3 з.п. ф-лы, 2 ил.

Роторно-поршневой компрессор

Роторно-поршневой компрессор с уплотнительными шайбами относится к области машиностроения и служит для сжатия газов. Может быть использован в холодильной промышленности и для производства сжатого газа.Новым в полезной модели является то, что роторно-поршневой компрессор, содержащий корпус с цилиндрическими расточками, клапан, ротор, имеющий одну лопасть, пропускной барабан, отличающийся тем, что он снабжен барабанной заглушкой, выполненной с выточкой на высоту лопасти и диаметром, равным диаметру цилиндрической полости, уплотнительной пластиной и уплотнительными шайбами, плотно установленными к боковым поверхностям ротора по диаметру цилиндрической полости, а лопасть отходит от поверхности цилиндра на высоту от 0.5 до 0.1 радиуса ротора, определяемую требуемым давлением.2. Роторно-поршневой компрессор по п. 1, отличающийся тем, что лопасть ротора выполнена в виде уплотнительной пластины, установленной в пазу вдоль ротора.3. Роторно-поршневой компрессор по п. 1, отличающийся тем, что сверху ...

РОТОРНАЯ МАШИНА КУРОЧКИНА

Использование: в области машиностроения и может быть применено в насосо- и двигателестроении. Сущность изобретения: в роторной машине, содержащей корпус с цилиндрической расточкой и каналами подвода и отвода рабочей среды, соосно установленное в корпусе статорное кольцо, эксцентрично установлен в корпусе ротор с диаметральными профилированными пазами и размещенными в них стержнями с разделительными пластинами на концах, имеющими возможность радиального перемещения в пазах ротора и образования в статорном кольце рабочих камер. Оба конца каждого стержня жестко соединены с прилегающими пластинами, а внутренняя поверхность статорного кольца выполнена в виде соосного с его внешней поверхностью многогранника с числом рабочих граней равным количеству пластин, при этом длина граней выполнена с условием: L>2E + T, где L - длина рабочей грани многогранника; E - эксцентриситет установки ротора относительно статорного кольца; T - ширина контактной поверхности радиального конца пластины. Контактная ...

РОТОРНАЯ ОБЪЕМНАЯ ГИДРОПНЕВМОМАШИНА

Использование: в гидропневмомашиностроении. Сущность изобретения: роторная объемная гидропневмомашина включает корпус с входным и выходным отверстиями, статор, эксцентрично расположенный в нем цилиндрический ротор с одним или несколькими диаметральными пазами, в которых выполнены шиберы с концевыми цилиндрическими пазами, в которых установлены вкладыши. Поверхность вкладышей составлена из двух выпуклых пересекающихся цилиндрических поверхностей, образующие роторы представляют дуги разных радиусов. Профиль статора представляет окружность или кривую, имеющую в зонах наибольшего перепада давления рабочей среды и/или наибольших контактных нагрузок радиус кривизны, равный большему радиусу образующих дуг вкладыша. 4 ил.

ГИДРОМАШИНА

Использование: машиностроение. Сущность изобретения: гидромашина содержит корпус со статором, установленный в них ротор с пластинами и внутренние уплотнительные элементы, имеющие сквозные отверстия, выполненные равномерно по окружности каждого внутреннего уплотнительного элемента и сообщающие уплотняющие поверхности с их тыльными поверхностями, имеющими чередующиеся между собой профилированные канавки, расположенные напротив сквозных отверстий, которые в местах перехода пластин из зон с разным давлением имеют перегородки. Тыльные поверхности взаимодействуют с упругими уплотнительными элементами, имеющими выступы. 3 ил.

РОЛИКОЛОПАСТНОЙ КОМПРЕССОР С УСТРОЙСТВОМ ТОРЦЕВОГО УПЛОТНЕНИЯ ВАЛА И СПОСОБ ЕГО РАЗГРУЗКИ ОТ ОСЕВЫХСИЛ

Изобретение относится к области роторных машин, в частности к компрессорам. Ролико-лопастной компрессор содержит корпус с выполненными в нем каналами для подвода и отвода рабочей среды, ротор и ролики-разделители, размещенные в корпусе с образованием между ротором, роликами-разделителями и корпусом полостей, опоры и узлы уплотнения. Каждый из узлов уплотнения содержит ступени высокого давления, низкого давления и бесконтактного уплотнения, причем ступень низкого давления связана с атмосферой, ступень высокого давления посредством дополнительно выполненного в корпусе канала - с одной из полостей, образованных ротором, роликами-разделителями и корпусом, а ступень бесконтактного уплотнения снабжена кольцом-гребнем с выполненными в нем канавками. Способ разгрузки от осевых сил ротора ролико-лопастного компрессора заключается в том, что из полости высокого давления к ступени высокого давление узла уплотнения подают газ, который через бесконтактное уплотнение направляют в полость низкого давления ...

МЕХАНИЧЕСКОЕ УПЛОТНЕНИЕ С УСОВЕРШЕНСТВОВАННЫМ УЗЛОМ УПЛОТНЕНИЯ

Группа изобретений относится к уплотнительной технике. Механическое уплотнение содержит: противоположные первый и второй уплотнительные элементы, каждый из которых имеет кольцевую уплотнительную поверхность, окружающую вал. Первый уплотнительный элемент выполнен с возможностью создания уплотнения для вращающегося вала, а второй уплотнительный элемент выполнен с возможностью создания уплотнения для корпуса. Уплотнительные поверхности выполнены с возможностью нахождения в скользящем контакте. Установочный узел выполнен с возможностью закрепления одного из уплотнительных элементов в требуемом положении относительно опорной структуры механического уплотнения. Установочный узел включает в себя опору, имеющую основание, прикрепленное к одному уплотнительному элементу, стопорное ребро, и удерживающую деталь для зажима стопорного ребра относительно опорной структуры с обеспечением передачи крутящего момента между одним уплотнительным элементом и опорной структурой. Технический результат заключается ...

УПЛОТНЕНИЕ

Использование: в роторных двигателях внутреннего сгорания, компрессорах, насосах, расходомерах, демпферах и т. п. Сущность изобретения: уплотнение содержит, по меньшей мере, один пружинный и один разрезной уплотнительный элемент, сжатый до определенного состояния и помещенный в посадочное место уплотняемого объекта. Уплотнение может содержать также дополнительный уплотнительный элемент вместе с разрезным, который частично контактирует с последним. Уплотнение может содержать пружинные элементы, поджимающие уплотнительные как друг к другу, так и к уплотняемым поверхностям. Уплотнение может содержать, по меньшей мере, три уплотнительных и один пружинный элементы, уплотнительные элементы взаимодействуют между собой торцовыми поверхностями, а пружинный поджимает уплотнительные как друг к другу, так и к уплотняемым поверхностям, что повышает эффективность и надежность уплотнения путем компенсации износа. 6 з. п. ф-лы, 11 ил.

УПЛОТНИТЕЛЬНЫЙ УЗЕЛ КОМПРЕССОРА

... 1. Компрессор, содержащий:корпус, определяющий первую область давления и вторую область давления,первый спиральный элемент, расположенный внутри корпуса и имеющий первую концевую пластину и первую спиральную намотку, которая ограничивает нагнетательный канал, сообщающийся со второй областью давления,второй спиральный элемент, имеющий вторую концевую пластину и вторую спиральную намотку, которая входит в зацепление с первой спиральной намоткой с образованием между ними камеры сжатия, иуплотнительный узел, ограничивающий камеру смещения, окружающий нагнетательный канал и непроницаемо для текучей среды изолирующий первую и вторую области давления друг от друга, при этом в камере смещения содержится текучая среда, смещающая первый спиральный элемент в сторону второго спирального элемента, уплотнительный узел содержит первый уплотняющий элемент и второй уплотняющий элемент, первый уплотняющий элемент ограничивает сообщение между камерой смещения и второй областью давления, когда первое давление ...

ЖИДКОСТНО-КОЛЬЦЕВОЙ НАСОС ВИНТОВОГО ТИПА

... 1. Жидкостно-кольцевой винтовой насос, содержащий корпус (9) насоса с впускной частью (3) и выпускной частью (11) и вращающийся винтовой ротор (8), установленный внутри корпуса и связанный с валом (7), который является общим для ротора и узла привода в виде двигателя (2), предпочтительно электродвигателя, причем насос (20) с корпусом (9) представляют собой удлинение двигателя (2) с корпусом двигателя, в результате чего образован объединенный или единый узел, отличающийся тем, что предусмотрено уплотнение (22, 23) вала, расположенное полностью или частично в кольцевом пространстве (24) внутри ротора (8), причем указанное уплотнение одним концом опирается на кольцевую часть (25) винтового ротора, расположенную в кольцевом пространстве (24) между ротором и валом, а другим концом плотно прилегает к выступающему внутрь элементу (21) в области выпускной части насоса. 2. Насос по п.1, отличающийся тем, что уплотнение вала образовано подпружиненным механическим уплотнительным элементом (22), который ...

Роторно-поршневой компрессор

Радиальное уплотнение роторного двигателя

Сущность изобретения: в П-образной формы наружном элементе размещены подпружиненные между собой профилированные внутренние элементы. Свободные концы наружного элемента расположены в пазу ротора. Внутренние элементы выполнены полыми П-образной формы из упругого материала и ориентированы перемычками навстречу друг другу. 3 ил.

Ротационный пластинчатый компрессор

Spiralverdichter mit Flüssigkeitseinspritzung

Seal for displacement machine axial gap - has sealing strips with removed material portions for increased resilience

The seal is intended for the axial gap between the machne housing and impeller. At the front side end of one component are sealing strips, held in axial grooves and axially facing the other component. The packing strips (15) incorporate bores (18), recesses, or other material removed for increased resilience. Pref. the bores etc. are parallel to the other component sealing faces. USE/ADVANTAGE - For compressible medium displacement machines, with increased service life.

ROTATIONSKOLBENVERDICHTER

Dichtungsvorrichtung fuer Drehkolbenverdichter

ABDICHTUNG FUER FLUEGELKOLBENPUMPEN

KAELTEKOMPRESSOR-BRENNKRAFTMASCHINENAGGREGAT DER ROTATIONSKOLBENBAUWEISE

MEHRSTUFIGE ROOTS-VAKUUMPUMPE.

Schraubenverdichtungsvorrichtung mit einer Dichtungsvorrichtung und Schraubenverdichter, der solch eine Schraubenverdichtungsvorrichtung umfasst

Die Schraubenverdichtungsvorrichtung umfasst ein erstes Schraubenelement (11) mit einer ersten Basisplatte (13) und einer ersten Spiralwicklung (14); ein zweites Schraubenelement (12) mit einer zweiten Basisplatte (15) und einer zweiten Spiralwicklung (16), wobei das erste oder das zweite Schraubenelement (11, 12) dazu konfiguriert ist, eine kreisende Bewegung bezüglich des jeweils anderen Schraubenelements - des ersten oder des zweiten - durchzuführen, wobei das erste und das zweite Schraubenelement (11, 12) miteinander kämmen und Verdichtungskammern (17) abgrenzen; und eine Dichtungsvorrichtung (28), die in einer Endseite (19) der ersten Spiralwicklung (14) angeordnet ist und eine Dichtungsfläche aufweist, die dazu konfiguriert ist, mit der zweiten Basisplatte (15) zusammenzuwirken. Die Dichtungsvorrichtung (28) ist dazu konfiguriert, einen Fluidstrom von einer stromaufwärtigen Verdichtungskammer zu einer stromabwärtigen Verdichtungskammer durch die Dichtungsfläche hindurch zu gestatten ...

FLÜSSIGKEITSRING-SCHRAUBENPUMPE

Radialkolbenpumpe

Eine Exzenterlageranordnung für eine Pumpenwelle (2) besteht aus einem drehfest mit dieser verbundenen Exzenterring (4) und einem auf dessen Mantelfläche angeordneten Nadellager, wobei in erfindungsgemäßer Weise eine Anlaufscheibe (12) in einer umlaufenden Nut (13) der Nadelhülse (9) gehalten und von deren benachbarten Bord (11) radial umfasst ist und mit einer in axialer Richtung nach innen offenen kreisringförmigen Nut (15) versehen ist, in der der Käfig (6) geführt ist.

Screw-type vacuum pump has at least two adjacent chambers directly interconnected by check valve with throughflow direction towards pressure side and formed by continuous valve passage

The screw-type vacuum pump has two meshing screw rotors(12,14) defining chambers(20-22) with respective volumes which become smaller in the direction of feed. At least two adjacent chambers are directly interconnected by a check valve(41a,41b) with throughflow direction towards the pressure side. The check valve is formed by a continuous valve passage, and the check valve in longitudinal section is constructed asymmetrically in such a way that it has different throughflow characteristics in both flow directions.

Einrichtung zur Kühlung und Wellenabdichtung eines Verdichters

Vane compressor

In a vane compressor, the rotor (1) and the two end plates (7, 8), which form part of the pump casing (5) housing the rotor (1), are made of aluminium or an aluminium alloy. Thin-walled metal elements (9, 10) of iron or steel are positioned between the rotor (1) and the end plates (7, 8) and prevent direct contact between these parts. In the end plates (7, 8), delivery pressure passages (7a, 7b, 8a, 8b) are provided to transmit delivery pressure, in order to load the thin-walled metal elements (9, 10) with delivery pressure in such a way, that these metal elements (9, 10) in operation are deflected into close contact against the lateral faces (1c, 1d) of the rotor (1), and very effective sealing against leakage is obtained between the rotor (1) and the thin-walled metal elements (9, 10). ...

DICHTUNGSANORDNUNG AN EINEM WELLENZAPFEN EINES TROCKENLAUFENDEN ROTATIONSSCHRAUBENVERDICHTERS

SPIRALVERDICHTER, INSBESONDERE ZUM EINSATZ BEI DER DRUCKLUFTERZEUGUNG FÜR SCHIENENFAHRZEUGE

VOLUMETRISCHE SCHNECKEN- UND ZAHNRAD-MASCHINE

Spiralverdichter

METHOD OF MANUFACTURING ARCUATE SEALING STRIPS

... 1459969 Making rotary piston seals AUDI NSU AUTO UNION AG and WANKEL GmbH 30 June 1975 [19 July 1974] 27490/75 Heading B3A A method of making arcuate sealing strips 10 for rotary piston side faces wherein the running surface on one edge of the strip carries a wear resistant layer (14), Fig. 5 (not shown), comprises winding up a metal band 20 into a spiral roll, applying the wear resistant layer to one side edge of the roll, unrolling the band and cutting it into individual sealing strips. The wound roll is placed in a casing 15 and it is tightly wound so that the material of the layer (14) does not penetrate between adjacent turns. The radii R1, R2 are respectively the maximum and minimum allowable for a sealing strip of nominal radius R. The layer (14) may be applied electrolytically, e.g. chromium, or by spraying, e.g. molybdenum or aluminium oxide.

ROTARY PISTON COMPRESSIBLE FLUID MACHINE

... 1448654 Rotary positive-displacement fluid-machines DORNIER SYSTEM GmbH 10 Feb 1975 [13 Feb 1974] 5633/75 Heading F1F In a compressible-fluid machine of the trochoidal-piston type axial sealing rings 4, 5 on the piston 1 are lubricated through bores 6, 7 in the upper region of each casing side wall 8, the spent lubricant being discharged through bores 6', 7' in the lower regions of said walls. The inner ends of the bores are swept in a generally vertical direction by the rings and may be either flared laterally or extended vertically by slots 9, Figs. 3a, 3b, 5a, Sb (not shown). Alternatively, the horizontal bores in each side wall are juxtaposed, Figs. 4a, 4b (not shown). The rings may be either circular or similar to the piston profile.

Improvements in rotary motors or compressors

... 274,036. Eloy, V. July 10, 1926, [Convention date]. Movable-abutment type; packing drums; driving pumps &c.-A rotary motor or compressor comprises two rotary eccentric cylinders 2, 3, one within the other, which are interconnected by a plurality of vanes 4 rigidly secured to the inner cylinder 2 and sliding in a rocking member 5 in the outer cylinder 3; the inner cylinder 2 is divided into a corresponding number of sections a, b on each of which is secured a vane extending the full length of the two cylinders. The admission and discharge is through ducts 17, 18 in the fixed shaft 1; the eccentric portion on which the inner cylinder rotates is formed with corresponding peripheral recesses 20 which periodically register with ports 21 in the inner cylinder. End packing rings 8 for the inner cylinder are held in place by pins 10. The drive takes place through a gear wheel 14 engaging a pinion 15 on the outer cylinder 3.

Restriction in scroll compressor backpressure tapping

A scroll compressor includes a tap 38 for communicating compressed refrigerant from a compression chamber 36 to a back pressure chamber 32 to resist a separating force between orbiting 22 and stationary 24 scrolls. A restriction 46 is placed within this tap to slow build-up of the back pressure chamber at start-up. Further, the restriction smoothes out any fluctuations in the back pressure force as the pressure in the compression chamber from which the refrigerant is tapped may fluctuate. The tap may comprise a chamber tap 38, a cross tap 34 and a back pressure tap 42 with the restriction in any of these. The restriction may be a grooved slip pin, a hollow tube containing a ball, a dowel plug with an orifice, a porous member or a threaded screw with a lengthwise groove.

Scroll compressor

An orbiting scroll 2 meshes with a non-orbital scroll 1 to form a compression space. A frame 3 axially supports the orbiting scroll and radially supports a drive shaft 8. A high and low pressure separator 4 is fixed to the frame 3. A seal member 10 in a clearance between the separator 4 and the non-orbital scroll 1 defines a pressure portion which presses the scroll 1 toward the scroll 2. The seal member 10 is disposed in the clearance at a position so as to lie in a plane parallel with the base plate of the non-orbital scroll 1 so that the scroll 1 is not diametrically restrained at the seal position.

Scroll compressor

Scroll vacuum pump with improved performance

A scroll compressor having improved efficiencies includes a fixed plate having a spiral involute and an orbiting plate having a spiral involute wrap. The fixed and orbiting plates are positioned in a housing such that the spiral involute wraps mesh with each other to define chambers. A sealant being applied to tips of said involute wraps, said sealant substantially closing any gaps between the tip of the involute wrap and the plat opposing the involute wrap. The sealant is chosen from the group consisting essentially of a grease, a dampening gel, and an epoxy. If a grease is used, then the grease is preferably a low vapor pressure grease. During assembly of the scroll compressor, the seal is applied to tips of the involute wraps. After the scroll compressor has been assembled, it is run to purge excess sealant, leaving sealant only in the gaps between the two scrolls. If an epoxy is used as a sealant, and the epoxy requires curing, the scroll compressor is disassembled after the initial ...

ROTARY POSITIVEDISPLACEMENT FLUID-MACHINES

Pump

A pump having a sealing arrangement 10 for sealing between the stator components 22, 24, 26, 28 of the pump. The end seals 14 of the arrangement comprise an annular portion 16 for sealing between end stator components 26, 28 and shell components 22, 24 and axial portions 18 which extend from the annular portion and together with separate axial seals 12 seal between the shell components. Preferably the axial portions and the axial seals are shaped for mutual contact in the form of a recess, which may be T-shaped or bulbous, on the axial seal and a complementary formation on the axial portion ...

Scroll compressor

Scroll pump

Scroll pump with tip seal pockets

Controlled contact pressure for scroll compressor seal

OIL-FREE ROTARY DISPLACEMENT COMPRESSOR

Thermal/noise management in a scroll pump

Shaft seal

Pump assemblies with stator joint seals

Scroll Pump

Improvements in vacuum pumps

Scroll compressor

ROOTS BLOWERS

The Roots pump has a suction chamber (2) with two pistons (3) and at least one oil-filled side chamber (7) which is divided from the suction chamber by a partition (5). Supported in the partition (5) there are the piston shafts (4). In order to prevent oil droplets and oil mists from crossing into the suction chamber (2) through the shaft bearings (10), a pressure equalisation duct (13) is provided, whose suction chamber-side mouth is situated at the point where the shaft (4) passes through. Part of the pressure equalisation duct may run outside the partition (5) and pass through a filter (17). ...

ROTARY PUMP OR COMPRESSOR

... 1525740 Rotary positive displacement fluid machines NIPPON PISTON RING KK and TOYOTA JIDOSHA KOGYO KK 12 Dec 1975 [13 Dec 1974(3)] 51117/75 Heading F1F In a rotary vacuum pump or compressor having a rotor 40 eccentrically located within a cylindrical chamber defining by a housing 10, flexible sealing plates 31, 32 are clamped between the housing 10 and end-plates 21, 22, the latter having recesses 21a, 22a corresponding in shape to the cylindrical chamber, and subjected to pressure forces exceeding those generated within the chamber to press the sealing plates against the rotor. As shown in Fig. 4, the recesses are connected to the outlet passage 12 via passages 10a, 21b, 22b. In the case of a vacuum pump the recesses may communicate with the atmosphere via passages in end-plates 21, 22. The recesses may be pressurized to a predetermined pressure by compressed air introduced into the recesses via passages closed by checkvalves, Fig. 6 (not shown). The recesses may be lined by flexible bags ...

MESHING-SCREW GAS-COMPRESSING APPARATUS

Adjustable mechanical seal.

Adjustable mechanical seal.

Adjustable mechanical seal.

LIQUID EYEBOLT PUMP

SPIRAL COMPRESSOR

POSITIVE-DISPLACEMENT ENGINE ACCORDING TO THE SPIRAL PRINCIPLE

PUMP

SPIRAL PUMP AND ASSEMBLY PROCEDURE FOR IT

LIQUID RING PUMP WITH A BETWEEN A FAN ROTOR HOUSING AND A WITH PIPE UNION PROVIDED COVER ARRANGED CONTROL DISK.

TWO-WAVE VACCUM PUMP WITH TRANSMISSION SPACE EVACUATION.

ROTARY SCREW COMPRESSOR WITH WAVE SEALING

AXIAL FACE SEAL ARRANGEMENT

Vakuumpume

SPIRAL COMPRESSOR

MULTI-WAVE VACCUM PUMP

ROTARY SCREW COMPRESSOR

TURNING TOOTH COMPRESSOR AND PROCEDURE FOR THE ENTERPRISE OF SUCH

LIQUID RING PUMP

PUMP WITH WAVE SEALING

SPIRAL COMPRESSOR

VANE-TYPE COMPRESSOR

SCROLL-TYPE MACHINE

Scroll compressor having bearing structure in the orbiting scroll to eliminate tipping forces

SCREW TYPE LIQUID RING PUMP

EPITROCHOIDAL COMPRESSOR

SHAFT SEAL

A b s t r a c t: A shaft seal for a gas pumping device comprising a mechanical seal (5,6) and a labyrinth seal in form of a sliding bearing (4). A chamber (7) between the mechanical seal and the sliding bearing is fed with lubricant for the bearing at a pressure being higher than the gas pressure on the other side of the mechanical seal so that there is no leakage of gas past the mechanical seal.

ROTARY COMPRESSOR WITH ROTOR SHAFT BEARING LUBRICANT INLET AND DRAINAGE MEANS

A rotary compressor is provided with annular oil traps between rotor bearings and the working chamber at the intake and discharge end thereof. The traps are maintained under low pressure generally equal to the intake pressure of the compressor The oil traps communicate with a point near the intake of the compressor, whereby any trapped oil can be returned, either directly or through a storage container, to the lubricating oil feeding system. The discharge of the compressor is provided with a pressurized separator in which the oil carried through the compressor by the compressed gas is trapped and returned back to the lubricating system. The advance in the art is in that only short and relatively inefficient packing of the shaft will suffice because any oil leaking through the shaft bearings is safely recirculated.

COMPRESSOR

... : I A rotary compressor of the sliding vane type is arranged to prevent seizure during high speed rotation, with increased volume efficiency through reduction of leakage of refrigerant, and simultaneous improvement in cycle efficiency by the prevention of entry of oil into the refrigeration cycle.

ROTARY COMPRESSOR

ROTARY COMPRESSOR The invention relates to a rotary compressor. The compressor comprises an open-ended cylinder having its open ends closed by end plates and an eccentrically rotatable rotor housed inside the cylinder. A hydrodynamic seal is provided on either the rotor or each of the end plates for minimizing any possible unwanted leakage of lubricant oil.

POSITIVE DISPLACEMENT SPIRAL VACUUM PUMP

ROTARY FLUID PUMP

FLUID POWER TRANSFER DEVICE

A fluid power transfer device (20) includes a wobble plate assembly (26) having a wobble plate (58) that rolls against truncated cone portions (42) of a housing (22) and has an inner extremity 60) rotatably supported by an axially inclined annular bearing (49), 49') on a spherical member (46) of the wobble plate assembly so as to rotate a shaft (24) during the wobbling motion. One embodiment includes a journal bearing (49) and an oil lubrication system (114) and another embodiment includes antifriction roller bearings (220) that support the wobble plate (58) on the spherical member (46), antifriction roller bearings (224) that rotatively support the shaft (24) on the housing (22') and seals (226) that rotatively seal between the shaft (24) and the housing (22'). The fluid power transfer device can be used as an internal combustion engine, a heat engine, a pump, a compressor or a fluid motor.

SCROLL TYPE FLUID DISPLACEMENT APPARATUS WITH IMPROVED ANTI-WEAR DEVICE

EPITROCHOIDAL VACUUM PUMP

An epitrochoidal vacuum pump includes a housing having a chamber, a rotor rotatably received within the internal space of the chamber, and a drive shaft configured to rotate the rotor eccentrically about an axis within the chamber in an epitrochoidal manner. An externally toothed guide sprocket meshes with and guides movement of a guide gear of the rotor as it is driven by the drive shaft. A chamber inlet draws air under negative pressure into the housing, and an outlet is provided to expulse air under positive pressure from the housing. Further, a fluid inlet is provided to input lubricant along the drive shaft and into the internal space of the chamber. The fluid inlet is communicated by channel(s) in an interior of the housing. The lubricant is drawn into the housing via a pressure differential.

TIPSEAL FOR A SCROLL COMPRESSOR

A scroll compressor including a non-orbiting and an orbiting scroll member having mating involute wraps extending therefrom. In one exemplary embodiment, at least one of the non-orbiting and orbiting scroll members includes an inner wall forming a groove in an end of the involute wrap and extending substantially entirely along the leng th thereof. Positioned within the groove is a tip seal having outwardly extending projections configured to engage the inner walls of the involute wrap along at least a portion thereof. In one exemplary embodiment, the tip seal has a length that is less than the length of the groove. As a result, a gap is formed at the innermost portion of the involute wrap between the end of the groove and the end of the tip seal.

PUMP FITTINGS AND METHODS FOR THEIR MANUFACTURE

A pump fitting has an inlet adaptor (10) for connection to an outlet (39) of a container (38) of fluid and including an inlet passage (10), an outlet passage (11) for fluid and a pump housing (12) between the inlet passage (10) and the outlet passage (11). The pump housing (12) contains a rotor (17) rotatably received in an interior surface of the housing (12). The rotor (17) includes a housing-engaging surface (23, 24) co-operating with the interior surface of the housing (12) to form a seal therebetween and also including at least one shaped surface (21, 22) radially inwardly of the housing-engaging surface and forming with the interior surface of the housing a chamber (25, 26) for conveying fluid from the inlet passage (10) to the outlet passage (11) on rotation of the rotor (17). A seal (28) is provided between the outlet passage (10) and the inlet passage (11), the seal (28) being urged into engagement with the rotor (17) to prevent fluid passing from the outlet passage (11) to the ...

OVAL CHAMBER CIRCULAR RACEWAY PUMP

A rotary device includes a housing having a tubular surface. The surface has an throughpassing axis and first and second ports. A rotor body rotates about the axis and has a plurality of slots extending generally radially from the axis. A vane is mounted in each slot for reciprocation such that the surface can be swept by the vanes as the body rotates. A seal permits fluid to flow into and out of the device substantially only via the first and second ports such that the vanes create chambers which decrease in volume when in communication with the first port and increase in volume when in communication with the second port. The tubular surface is oval in cross-section.

EMISSION SEAL

The shaft seal assembly of cartridge designed for sealing shafts entering or exiting enclosed vessels. The enclosed vessels may have a pressure different from the atmospheric pressure and the seal will normally prevent leakage from or into the vessel. The seal is accomplished by having a plurality of fluid pressures presented to different faces or portions of the seals. Utilization of these pressures provides a seal between the faces of the rotating parts and the stationary parts of the seal with a minimum of friction. This reduced friction is a result of some amount of air movement between the sealing faces. This air movement into and out of the seal, resulting from fluid pressure differentials, will also carry away any contaminants that may get into the seal, either to the ambient atmosphere or to a recovery system. The seal is designed to accept axial and radial shaft displacement while maintaining a positive seal between the vessel and the atmosphere. The seal of this invention includes ...

AXIALLY FLOATING SCROLL MEMBER ASSEMBLY

COMPRESSOR

In a compressor in which a compression mechanism incorporated in a housing is driven by a drive shaft penetrating the housing, and the compression mechanism is lubricated by mist-form lubricating oil contained in a low-pressure gas refrigerant sucked into the housing, the lubricating oil in a space is prevented from entering a bearing and deteriorating grease in the bearing. An equalizing hole is formed to allow the space to communicate with the atmosphere, the space being defined between the bearing pivotally supporting the outer end of the drive shaft on the housing and a shaft seal disposed on the inside of the bearing to seal a gap between the drive shaft and the housing.

STABILIZATION RING AND SEAL CLEARANCE FOR A SCROLL COMPRESSOR

An axial compliance mechanism for a scroll-type compressor including a fixed scroll member, an orbiting scroll member and a bearing pad spatially fixed i n relationship to the fixed scroll member. The axial compliance mechanism bias es the orbiting scroll towards the fixed scroll by applying a fluid at high pressur e to a radially inner portion of the back surface of the orbiting scroll member and a relatively lower pressure to a radially outer portion of the back surface. A n annular stabilization ring is placed between a main bearing pad and the rear surface of the orbiting scroll lifting the orbiting scroll into engagement with the fixed s croll and inhibiting the tilting and wobbling of the orbiting scroll. The annular stab ilization ring also maintains a clearance between the rear surface of the orbiting scr oll and the main bearing pad thereby improving the performance of a sealing member dispo sed between the main bearing pad and the rear surface of the orbiting scroll mem ber during ...

INTERMEDIATE PRESSURE REGULATING VALVE FOR A SCROLL MACHINE

A valve for regulating pressure intermediate suction and discharge pressure in a scroll compressor having an axially sealing interface between a fixed and orbiti ng scroll member through which the axial relationship between the scroll members ma y be controlled. The scroll members are axially biased together by refrigerant gas at a pressure intermediate the suction and discharge pressures and which is disposed in an intermediate pressure chamber defined in part by a generally planar surface of t he orbiting scroll member. A self-regulating sliding valve, actuated by forces exer ted on axial valve surfaces by suction, discharge and intermediate gas pressures, contr ols the amount of intermediate gas pressure in the intermediate gas pressure chamber. An annular groove in fluid communication with a longitudinal bore within the valve body and which opens to the intermediate pressure chamber is moved between a first position, in which the annular valve groove communicates with a passage to the ...

TWO STAGE VACUUM PUMPING APPARATUS

Vacuum pumping apparatus includes a non-scroll type auxiliary pump (60) and a scroll pump (62) disposed in a single housing (52). The auxiliary pump and the scroll pump are connected in series and are driven by a common motor (68). Typically, the auxiliary pump has a relatively high pumping speed and the scroll pump has a relatively high compression ratio. The auxiliary pump may be a regenerative blower, a roots-type blower or a screw-type blower. When a corotating scroll pump is utilized, a regenerative blower may be formed at or near the outer periphery of a disk on which the non-orbiting scroll blade is mounted. In another configuration, first and second scroll pumps are disposed within a housing. The scroll blade sets of the first and second scroll pumps have different orbiting radii. Scroll pump leakage may be reduced by forming a closed-loop seal around the inlet region of the scroll pump and connecting the inlet region to an intermediate pressure. Scroll pump leakage and contamination ...

Scroll-Type Fluid Machine

A scroll-type fluid machine reduces intrusion of abrasion powders, generated by sliding of a conductor causing an orbiting scroll side and a fixed scroll side to be conducted, into a compression chamber, and improves reliability of a compressor. The scroll-type machine includes a casing, a fixed scroll having a flange surface attached to the casing, and a wrap portion provided at an end plate, an orbiting scroll having a wrap portion provided at the end plate, and provided in an opposed relationship with the fixed scroll, a drive shaft connected through a crank portion to the orbiting scroll, an orbiting bearing, a face seal portion arranged between the orbiting scroll and the fixed scroll, a cooling fan, and an orbiting scroll side conductive brush.

Scroll compressor

The present disclosure relates to a scroll compressor. According to the present disclosure, in a shaft penetration scroll compressor in which an eccentric portion of the rotation shaft is overlapped with a orbiting wrap of the orbiting scroll in a radial direction, a back pressure chamber formed at a rear surface of the orbiting scroll may be eccentrically formed from the circular center around a discharge port to correspond to the eccentric discharge port, thereby effectively preventing tilting of the orbiting scroll due to the eccentricity of a gas force generated while the discharge port is eccentrically formed.

Scroll compressor

A scroll compressor configured in such a manner that a back pressure chamber is formed on the back surface side of the movable scroll using an annular seal means, and pressurized fluid is introduced into the back pressure chamber through a pressure introduction hole. A thrust bearing member which is a separate member from the seal means and bears a thrust force acting toward the main bearing member from the bottom plate section side of the movable scroll is disposed between the back surface of the bottom plate section of the movable scroll and the front surface of the main bearing member which faces the back surface of the bottom plate section. The scroll compressor is configured in such a manner that the scroll compressor can satisfy the demand for more compactness and that a reduction in the durability and sealing function of the annular seal means can be minimized.

COMPRESSOR WITH THERMAL PROTECTION SYSTEM

A compressor includes a housing, a partition, a first scroll, a second scroll, and a thermal protection system. The partition is disposed within the housing and defines a suction chamber and a discharge chamber. The partition includes a discharge passage in fluid communication with the discharge chamber. The thermal protection system includes a positioning body and a displacement member. The positioning body is coupled to the second scroll and translatably disposed within the discharge passage. The displacement member is disposed between the positioning body and the partition and configured to translate the second scroll relative to the first scroll between first and second positions. 1. A compressor comprising:a housing;a partition disposed within the housing, the partition defining a suction chamber and a discharge chamber, and including a discharge passage in fluid communication with the discharge chamber;a first scroll supported within said housing and including a first endplate having a first spiral wrap extending therefrom;a second scroll supported within said housing and including a second endplate having a first side and a second side opposite the first side, the first side having a second spiral wrap extending therefrom and meshingly engaged with said first spiral wrap to form a series of compression pockets; anda thermal protection system including a positioning body and a displacement member, the positioning body coupled to the second scroll and translatable relative to the discharge passage, the displacement member disposed between the positioning body and the partition and configured to translate the second scroll relative to the first scroll between first and second positions in response to a change in an operating temperature of the compressor.2. The compressor of claim 1 , wherein the displacement member comprises a shape memory material.3. The compressor of claim 2 , wherein the shape memory material includes at least one of a bi-metal and tri-metal ...

SUPERCHARGER

The present invention relates to compression based engine boosting systems, and, more particularly, to a supercharger configuration for higher pressure applications. 1. A boost system for an engine comprising:a supercharger housing including a rotor cavity and gear case;an input drive shaft that is configured to be driven by the engine, the input drive shaft being at least partially housed within the gear case of the housing;a first rotor drive shaft at least partially housed within the rotor cavity of the housing;a second rotor drive shaft at least partially housed within the rotor cavity of the housing;a gear assembly that transfers torque between the input drive shaft and the first and second rotor drive shafts at least partially housed within the gear case of the housing;a first ring seal located on the first rotor shaft in the rotor cavity adjacent the gear case;a second ring seal located on the second rotor shaft in the rotor cavity adjacent the gear case;a first annular oil seal located on the first rotor shaft between the first ring seal and the gear case;a second annular oil seal located on the second rotor shaft between the second ring seal and the gear case;a first air vent pathway located between the first annular oil seal and the first ring; anda second air vent pathway located between the second annular oil seal and the second ring.2. The boost system of claim 1 , wherein the first and second air vent pathways intersect and flow together to an air outlet port.3. The boost system of claim 1 , further comprising an air conduit connected to the outlet port configured to direct air from the air outlet port back into the engine.4. The boost system of claim 3 , wherein the conduit is configured to direct air from the outlet port into the engine at a location wherein the pressure therein is between 0.5 to 1.5 atmospheres.5. The boost system of claim 3 , wherein the conduit is configured to direct air from the outlet port into the crankcase of an engine6. The ...

AXIAL SEAL FOR ROOTS-STYLE SUPERCHARGER

A blower housing including a first and second rotor assembly such that the first rotor assembly includes a first rotor and a first shaft and the second rotor assembly includes a second rotor and a second shaft. The first and second rotors each have a plurality of lobes. Each first and second rotor includes an axial sealing extension that can be constructed to extend axially into the shaft opening. The axial sealing extension can include a radially outwardly facing sealing surface that opposes a radially inwardly facing sealing surface defined within the shaft opening. The radially outwardly facing sealing surface and the radially inwardly facing sealing surface can be configured to cooperate to form a radial sealing interface that extends around an axis. The radial sealing interface can include a radial seal clearance defined between the radially outwardly facing sealing surface and the radially inwardly facing sealing surface. 1. A blower comprising:a blower housing defining a blower chamber including first and second bore sections that extend respectively along first and second axes, the first and second bore sections being defined by first and second bore-defining portions of the blower housing, the blower housing also defining an inlet and an outlet in fluid communication with the blower chamber, the blower housing further defining a timing gear chamber, the blower housing including a divider wall that separates the blower chamber from the timing gear chamber, the divider wall defining first and second shaft openings respectively aligned along the first and second axes, the first and second shaft openings extending through the divider wall from the blower chamber to the timing gear chamber, the blower housing further including a first and second rotor assembly, wherein the first rotor assembly includes a first rotor and a first shaft and the second rotor assembly includes a second rotor and a second shaft;the first rotor configured to be mounted on the first ...

COMPRESSOR

A compressor, more particularly, a scroll compressor provides structures that may enhance centrifugal stiffness at a contact point between a fixed scroll and an orbiting scroll. The compressor may include an orbiting scroll having an orbiting scroll wrap wound around a radial-direction inner area from a radial-direction outer area; and a fixed scroll having a fixed scroll wrap wound around the radial-direction inner area from the radial-direction outer area. A surfacing part may be configured to narrow a distance between the orbiting scroll wrap and the fixed scroll wrap may be formed in a predetermined section of the orbiting scroll or fixed scroll wrap. 1. A compressor comprising:an orbiting scroll having an orbiting scroll wrap;a fixed scroll having a fixed scroll wrap; anda surfacing part that is disposed at the orbiting scroll wrap or the fixed scroll wrap and that reduces a distance between the orbiting scroll wrap and the fixed scroll wrap.2. The compressor of claim 1 , wherein the distance between the orbiting scroll wrap and the fixed scroll wrap is uniform except for an area including the surface part and areas at ends of the orbiting scroll wrap and the fixed scroll wrap.3. The compressor of claim 1 , wherein the orbiting scroll wrap and the fixed scroll wrap have thicknesses that at least partially vary claim 1 , andwherein the distance between the orbiting scroll wrap and the fixed scroll warp is constant except for an area including the surfacing part.4. The compressor of claim 1 , wherein the orbiting scroll and the fixed scroll are configured to make four or five contact points between the orbiting scroll wrap and the fixed scroll wrap based on the orbiting scroll orbiting with respect to the fixed scroll.5. The compressor of claim 4 , wherein the surfacing part is disposed at one of the contact points.6. The compressor of claim 4 , wherein an orbiting angle of the orbiting scroll has (i) a first range in which the four contact points are made ...

Compressor Having Capacity Modulation

A compressor may include a shell assembly, a first scroll, a second scroll, a piston, and a piston-retention member. The piston engages the first scroll and may be partially received within a recess defined by the shell assembly. The piston and the shell assembly may cooperate to define a pressure chamber. The pressure chamber may be in selective fluid communication with a source of working fluid to control movement of the piston relative to the shell assembly. The piston-retention member may be mounted to the piston and selectively engage a rotationally fixed structure. The piston-retention member allows rotation of the piston relative to the first scroll in a first rotational direction and restricts rotation of the piston relative to the first scroll in a second rotational direction. 1. A compressor comprising:a shell assembly defining a discharge chamber;a first scroll disposed within the shell assembly and including a first end plate and a first spiral wrap extending from the first end plate;a second scroll disposed within the shell assembly and including a second end plate and a second spiral wrap extending from the second end plate, the first and second spiral wraps meshing;a piston engaging the first scroll and cooperating with the shell assembly to define a pressure chamber therebetween, wherein the pressure chamber is in selective fluid communication with a first source of working fluid to control movement of the piston relative to the shell assembly; anda piston-retention member mounted to the piston and selectively engaging a rotationally fixed structure, wherein the piston-retention member allows rotation of the piston relative to the first scroll in a first rotational direction and restricts rotation of the piston relative to the first scroll in a second rotational direction that is opposite the first rotational direction.2. The compressor of claim 1 , wherein a spring engages the piston-retention member and the piston claim 1 , and wherein the spring ...

SEALING STRUCTURE AND SCROLL AIR COMPRESSOR HAVING SAME

Disclosed are a sealing structure and a scroll air compressor having the same. The sealing structure includes: an orbiting scroll including an orbiting scroll spiral tooth (), the orbiting scroll spiral tooth () being provided with an orbiting scroll spiral tooth groove (), an orbiting scroll wear-resistant sealing strip () being provided in the orbiting scroll spiral tooth groove (); a stationary scroll including a stationary scroll spiral tooth () matched with the orbiting scroll spiral tooth (), the stationary scroll spiral tooth () being provided with a stationary scroll spiral tooth groove (), a stationary scroll wear-resistant sealing strip () is provided in the stationary scroll spiral tooth groove (), the wear-resistant sealing strip () is divided into sections including a high-temperature and high-pressure section () and a medium-temperature and medium-pressure section (). The sealing structure reduces costs of use and maintenance of the sealing strip; a buffer contact surface of the wear-resistant sealing strip () in contact with a scroll surface is flat, which improves performances of sealing and noise-reduction; a bottom surface of the wear-resistant sealing strip () is equipped with a sealing ring having a cross section in a shape of a circle or a circular tube, which improves the damping and buffering performances; thereby the performance of the air compressor is improved, and the use cost of the air compressor is also reduced. 1. A sealing structure , comprising:an orbiting scroll comprising an orbiting scroll spiral tooth, wherein the orbiting scroll spiral tooth is provided with an orbiting scroll spiral tooth groove, an orbiting scroll wear-resistant sealing strip is provided in the orbiting scroll spiral tooth groove, the orbiting scroll wear-resistant sealing strip comprises the orbiting scroll wear-resistant sealing strip in a high-temperature and high-pressure section and the orbiting scroll wear-resistant sealing strip in a medium-temperature ...

Scroll compressor

A scroll compressor is provided in which a center of a back pressure chamber is eccentrically disposed relative to a center of a fixed scroll. For example, the center of the back pressure chamber may be moved towards a center of an orbiting scroll at a time of discharge, thereby preventing displacement of the fixed scroll and ensuring stability in orbital movement of the orbiting scroll.

SCROLL COMPRESSOR AND REFRIGERATION CYCLE APPARATUS

A first injection port is open to a suction chamber of a plurality of chambers at some rotation phases, and is located within an angular range defined by a line connecting a winding-end contact point of an orbiting scroll at a compression start phase with a base circle center of a fixed scroll and one of two lines tangent to a winding-end point locus of a tip seal at a tooth tip of a spiral body of the orbiting scroll and passing through a base circle center of the orbiting scroll, the one being closer to the winding-end contact point. The first injection port does not interfere with the tip seal at the tooth tip of the spiral body of the orbiting scroll. 1: A scroll compressor comprising:a hermetic container;a compression mechanism disposed in the hermetic container and including a fixed scroll and an orbiting scroll each including a spiral body disposed on a baseplate, the spiral body of the fixed scroll and the spiral body of the orbiting scroll being combined together to form a plurality of chambers including a compression chamber;a motor mechanism configured to drive the orbiting scroll; anda rotation shaft coupled to the orbiting scroll, with the orbiting scroll being eccentric from the motor mechanism, the rotation shaft being configured to transmit torque of the motor mechanism to the orbiting scroll to cause the orbiting scroll to orbit,wherein a tooth tip of the spiral body of the orbiting scroll has a tip seal;the baseplate of the fixed scroll has a first injection port intermittently opened and closed by the tooth tip of the spiral body of the orbiting scroll as the orbiting scroll orbits; andthe first injection port is open to a suction chamber of the plurality of chambers at some rotation phases, and is located within an angular range defined by a line connecting a winding-end contact point of the orbiting scroll at a compression start phase with a base circle center of the fixed scroll and one of two lines tangent to a winding-end point locus of the ...

UNFASTENED THRUST PLATE

A scroll compressor with unfastened thrust plate includes a compressor housing and scroll compressor bodies disposed in the compressor housing. The scroll bodies include a fixed scroll body and a moveable scroll body. The fixed and moveable scroll bodies have respective bases and respective scroll ribs that project from the respective bases. The scroll ribs mutually engage. The moveable scroll body is movable relative to the fixed scroll body for compressing fluid. An upper bearing member provides axial thrust support to the moveable scroll compressor body through a bearing support via an unfastened thrust plate that is located between the upper bearing member and the moveable scroll body. The unfastened thrust plate has no means of attachment to the upper bearing member or to the moveable scroll body. 1. A scroll compressor with unfastened thrust plate comprising:a compressor housing;scroll compressor bodies disposed in the housing, the scroll bodies including a fixed scroll body and a moveable scroll body, the fixed and moveable scroll bodies having respective bases and respective scroll ribs that project from the respective bases, wherein the scroll ribs mutually engage, the moveable scroll body being movable relative to the fixed scroll body for compressing fluid; andan upper bearing member which provides axial thrust support to the moveable scroll compressor body through a bearing support via a unfastened thrust plate that is located between the upper bearing member and the moveable scroll body, the unfastened thrust plate having no means of attachment to the upper bearing member or to the moveable scroll body.2. The scroll compressor of claim 1 , wherein the unfastened thrust plate is rotationally unconstrained.3. The scroll compressor of claim 1 , wherein the unfastened thrust plate is constrained radially by an upper bearing member.4. The scroll compressor of claim 3 , wherein the unfastened thrust plate is concentrically located within a portion of the ...

LOW COST SCROLL COMPRESSOR OR VACUUM PUMP

A low cost scroll device and methods of manufacturing the same are described. The scroll device includes, for example, a drive pin hole and bearing bores machined into a scroll of the scroll device from the same side as the involute of the scroll; idler shaft assemblies with no more than one bearing in the orbiting scroll for mechanically coupling the orbiting scroll to the fixed scroll; and an epoxy coating applied using a process that requires assembly of the scroll device only once. 1. A scroll device comprising:a fixed scroll comprising a first side opposite a second side, the first side comprising a first involute and a second side comprising a plurality of cooling fins;an orbiting scroll comprising a second involute, the orbiting scroll mounted to the fixed scroll via a mechanical coupling and configured to orbit relative to the fixed scroll on the mechanical coupling;a motor operably connected to the orbiting scroll; anda cooling fan mounted to the second side of the fixed scroll.2. The scroll device of claim 1 , wherein the mechanical coupling comprises at least one idler shaft assembly claim 1 , the idler shaft assembly comprising a single bearing provided in a first bearing bore of one of the fixed scroll and the orbiting scroll claim 1 , a plurality of bearings provided in a second bearing bore of another of the fixed scroll and the orbiting scroll claim 1 , and an idler shaft supported by the first bearing and the plurality of bearings.3. The scroll device of claim 2 , wherein the first bearing bore is positioned in the orbiting scroll claim 2 , and the second bearing bore is positioned in the fixed scroll.4. The scroll device of claim 3 , further comprising at least two retaining screws positioned to secure the single bearing in the first bearing bore claim 3 , and at least two additional retaining screws positioned to secure the plurality of bearings in the second bearing bore.5. The scroll device of claim 3 , wherein the first bearing bore is machined ...

CAPACITY MODULATED SCROLL COMPRESSOR

A compressor may include a first scroll member having a first spiral wrap, a first chamber, and a first aperture. A second scroll member may include a second spiral wrap engaged with the first spiral wrap to form a series of compression pockets and a second aperture. The first aperture may be in communication with a first of the compression pockets to provide communication between the first compression pocket and the first chamber. The second aperture may be in communication with a second of the compression pockets. A capacity modulation assembly may include a first piston preventing communication between the first aperture and a first passage when in a first position and providing communication when in a second position. A second piston may prevent communication between the second aperture and a third passage when in the first position, and provide communication when in a second position. 1. A compressor comprising:a housing including a discharge pressure region and a suction pressure region;a first scroll member supported within said housing and having a first end plate, a first spiral wrap extending from a first side of said first end plate, a first chamber located on a second side of said first end plate having first and second passages in communication therewith, and a first aperture extending through said first end plate and in communication with said first chamber,a second scroll member supported within said housing and including a second end plate having a second spiral wrap extending therefrom and meshingly engaged with said first spiral wrap to form a series of compression pockets and a second aperture extending therethrough, said first aperture being in communication with a first of said compression pockets to provide communication between said first compression pocket and said first chamber and said second aperture being in communication with a second of said compression pockets; and a first piston located within said first chamber and displaceable ...

MOTOR-OPERATED COMPRESSOR

An electric compressor includes a main housing including a motor chamber. The motor chamber includes a driving motor. The compressor includes a frame fixed to one end of the main housing, a first scroll supported by one side surface of the frame, and a second scroll provided between the frame and the first scroll. The second scroll, supported by the frame, makes an orbiting motion upon receiving a rotational force from the driving motor. The second scroll also forms a compression chamber with the first scroll and a back pressure space with the frame. A rear cover coupled to the main housing forms a discharge space with the first scroll. A back pressure flow channel extends through the first scroll and the frame to guide a refrigerant and oil from the compression chamber to the discharge and back pressure spaces. The compressor also includes a plurality of decompression portions. 1. An electric compressor comprising:a main housing including a motor chamber;a driving motor disposed in the motor chamber;a frame fixed to one end of the main housing;a first scroll supported by one side surface of the frame;a second scroll provided between the frame and the first scroll and supported by the frame, the second scroll forming a compression chamber with the first scroll, and forming a back pressure space with the frame, and configured to make an orbiting motion relative to the first scroll when receiving a rotational force from the driving motor to form;a rear cover coupled to the main housing to support one side surface of the first scroll and forming a discharge space with the first scroll;a back pressure flow channel extending through the first scroll and the frame and configured to guide a refrigerant and oil discharged from the compression chamber to the discharge space and the back pressure space;a first decompression portion provided at a first position between the rear cover and the first scroll, the first decompression portion being configured to reduce a pressure of ...

MOTOR-OPERATED COMPRESSOR

A motor-operated compressor includes: a fixed scroll; an orbiting scroll engaged with the fixed scroll to perform an orbiting motion and forming a pair of compression chambers together with the fixed scroll during the orbiting motion; a frame provided opposite to the fixed scroll with the orbiting scroll interposed therebetween, and forming a back pressure chamber so as to axially support the orbiting scroll; and a rotation shaft coupled to the frame and the orbiting scroll in a penetrating manner. The rotation shaft is supported by the frame in a first axial direction and rotatably coupled to the fixed scroll, and an elastic member is disposed between the fixed scroll and the rotation shaft to support the rotation shaft in a second axial direction opposite to the first axial direction with respect to the first scroll. 1. A motor-operated compressor , comprising:a fixed scroll;an orbiting scroll engaged with the fixed scroll and configured to perform an orbiting motion relative to the fixed scroll, and the orbiting scroll and the fixed scroll forming a pair of compression chambers therebetween during the orbiting motion;a frame disposed opposite to the fixed scroll with the orbiting scroll interposed between the frame and the fixed scroll, a back pressure chamber being formed between the frame and the orbiting scroll, and the back pressure chamber being configured to axially support the orbiting scroll;a rotation shaft coupled to the frame and the orbiting scroll and penetrating through the frame and the orbiting scroll, and the rotation shaft being supported on the frame in a first axial direction and rotatably coupled to the fixed scroll; andan elastic member disposed between the fixed scroll and the rotation shaft, the elastic member being configured to support the rotation shaft in a second axial direction opposite to the first axial direction with respect to the fixed scroll.2. The motor-operated compressor of claim 1 , wherein:the fixed scroll includes a ...

SHAFT SEAL FOR AN OPEN-DRIVE COMPRESSOR

Devices and methods for maintaining lubrication of a shaft seal of an open-drive compressor that is operating in a vacuum condition. The external side of the shaft seal allows retention of a volume of lubricant for extending the lifespan of the shaft seal for the open-drive compressor. The devices can also reduce and/or prevent deterioration of the shaft seal regardless of the operation condition of the open-drive compressor. The devices can further reduce and/or prevent leakage of a lubricant and/or refrigerant that can cause deterioration of components within a transport refrigeration unit (TRU). 1. A seal cover assembly for a compressor of a refrigeration unit , comprising:a seal cover configured to separate a suction side of a shaft seal from an external side cavity of the shaft seal and configured to maintain a volume of lubricant within the seal cover during a vacuum condition; anda drain tube connected to the external side cavity, wherein the drain tube includes a check valve for slowing a flow of the lubricant out of the external side cavity when in a vacuum condition.2. The seal cover assembly as in claim 1 , wherein the seal cover includes:a center opening; andan inner surface facing the center opening, the inner surface including a lubricant drain channel connected to a drain hole, the lubricant drain channel being configured to maintain a volume of lubricant in the external side cavity so that only lubricant above the volume is directed to flow to the drain hole.3. The seal cover assembly as in claim 1 , wherein the seal cover includes:a center opening; andan inner surface facing the center opening, the inner surface including a drain inlet, the drain inlet being configured to maintain a volume of lubricant in the external side cavity so that only lubricant above the volume is directed to flow through the drain inlet.4. The seal cover assembly as in claim 1 , wherein the seal cover does not have a continuously open vent to the ambient atmosphere.5. The ...

Shaft Slide Ring Seal Arrangement

A shaft slide ring seal arrangement including a shaft, which has a first and second end, and a slide ring seal, which includes a shaft slide ring connected non-rotatably to the shaft, the axial displaceability whereof is limited at least in the direction of the first end of the shaft by a limiting element, and a slide ring arrangement arranged at a radial distance from the shaft, which slide ring arrangement lies, at a side of the shaft slide ring pointing towards the second end of the shaft, axially adjacent thereto, as well as a retaining ring supported on the shaft, the axial displaceability whereof is limited at least in the direction of the second end of the shaft and which centers the slide ring arrangement, on its side facing away from the shaft slide ring, with respect to the shaft. 1. A shaft slide ring seal arrangement , comprisinga shaft, which has a first end and a second end, anda slide ring seal, which includes:a shaft slide ring connected non-rotatably to the shaft, the axial displaceability whereof is limited at least in the direction of the first end of the shaft by means of a limiting element, anda slide ring arrangement arranged at a radial distance from the shaft, which slide ring arrangement lies, at a side of the shaft slide ring pointing towards the second end of the shaft, axially adjacent thereto, whereina retaining ring supported on the shaft, the axial displaceability whereof is limited at least in the direction of the second end of the shaft and which centers the slide ring arrangement, on its side facing away from the shaft slide ring, with respect to the shaft.2. The shaft slide ring seal arrangement according to claim 1 ,wherein the retaining ring has a face pointing towards the slide ring arrangement and descending towards the shaft longitudinal axis.3. The shaft slide ring seal arrangement according to claim 1 ,wherein the slide ring arrangement includes a slide ring and a slide ring holder, wherein the slide ring holder is ...

SCROLL COMPRESSOR, AND SEALING METHOD AND SEALING ARRANGEMENT FOR MID-PRESSURE CHAMBER THEREOF

A scroll compressor and a sealing method and sealing arrangement for a mid-pressure chamber thereof are provided. The scroll compressor includes: a scroll compressor shell; a housing, mounted inside the scroll compressor shell; a fixed scroll, fixed onto the housing; an orbiting scroll, supported on the housing and cooperating with the fixed scroll; a driving mechanism, located between the orbiting scroll and the housing and connected to the orbiting scroll to drive the orbiting scroll to orbit; and a mid-pressure chamber, which is a cavity surrounded by a hub of the orbiting scroll and a part of the housing and which is sealed by two sealing members. 118-. (canceled)19. A scroll compressor , comprising:a scroll compressor shell;a housing, mounted inside the scroll compressor shell;a fixed scroll, fixed onto the housing;an orbiting scroll, supported on the housing and cooperating with the fixed scroll;a driving mechanism, located between the orbiting scroll and the housing, and connected with the orbiting scroll to drive the orbiting scroll to orbit; anda mid-pressure chamber, being a cavity surrounded by a hub of the orbiting scroll and a part of the housing, and wherein the mid-pressure chamber is sealed by two sealing members.20. The scroll compressor according to claim 19 , wherein claim 19 ,the two sealing members are disposed on the housing.21. The scroll compressor according to claim 20 , wherein claim 20 ,a first sealing member of the two sealing members is located at a position where an outer end of a lower surface of a main body of the orbiting scroll is in contact with a first part at an upper portion of the housing, and a second sealing member of the two sealing members is located at a position where a bottom of the hub of the orbiting scroll is in contact with a second part at a lower portion of the housing.22. The scroll compressor according to claim 21 , wherein claim 21 ,the first sealing member is located in a groove in the first part of the housing ...

SCROLL PUMP TIP SEALING

A scroll pump tip seal to seal a single stage of a scroll pump that includes a first scroll and a second scroll. The tip seal is formed of a plurality of seal segments fitted contiguously end to end to a tip face the scroll wall of the scroll to form a continuous seal between the tip face and a base plate of the second scroll. 1. A scroll pump comprising:an orbiting scroll;a fixed scroll; anda driver configured to impart an orbiting motion to the orbiting scroll relative to the fixed scroll;wherein said orbiting scroll comprises an orbiting scroll base plate and an orbiting scroll wall extending from said orbiting scroll base plate towards said fixed scroll and said fixed scroll comprises a fixed scroll base plate and a fixed scroll wall extending from said fixed scroll base plate towards said orbiting scroll,said orbiting scroll wall has a tip face that faces said fixed scroll base plate and said fixed scroll wall has a tip face that faces said orbiting scroll base plate,said tip face of the orbiting scroll wall is provided with a first tip seal arrangement for sealing between the orbiting scroll wall and the fixed scroll base plate and said tip face of the fixed scroll wall is provided with a second tip seal arrangement for sealing between the fixed scroll wall and the orbiting scroll plate, andat least one of said first and second tip seal arrangements comprises a plurality of seal segments disposed contiguously end to end on the respective said tip face.2. The scroll pump as claimed in claim 1 , wherein said seal segments each comprise planar end faces and are arranged such that respective opposed said end faces of adjacent said seal segments are in abutting relationship.3. The scroll pump as claimed in claim 1 , wherein said seal segments each comprise end faces and are arranged such that respective opposed said end faces of adjacent said seal segments are disposed in overlapping relationship.4. The scroll pump as claimed in claim 3 , wherein said overlapping ...

SCROLL COMPRESSOR

A scroll compressor according to the present disclosure includes a partition wall that divides a sealed vessel into a high-pressure space and a low-pressure space, a non-orbiting scroll provided in the low-pressure space, an orbiting scroll that forms a compression chamber between the orbiting scroll and the non-orbiting scroll, and a rotational shaft. The scroll compressor further includes a main bearing that supports the orbiting scroll, an elastic body that biases one of the non-orbiting scroll and the orbiting scroll so as to separate the non-orbiting scroll and the orbiting scroll from each other, and a plurality of columnar members that are fixed at one ends of the columnar members and are movable at the other ends of the columnar members, and are disposed in a circumferential direction. The non-orbiting scroll or the orbiting scroll that is biased by the elastic body is movable between the partition wall and the main bearing in an axial direction of the rotational shaft. The elastic body is disposed between the plurality of columnar members in the circumferential direction. 1. A scroll compressor comprising: a partition wall that divides a sealed vessel into a high-pressure space and a low-pressure space;a non-orbiting scroll provided in the low-pressure space, the non-orbiting scroll being disposed adjacent to the partition wall;an orbiting scroll that engages with the non-orbiting scroll with a compression chamber defined between the orbiting scroll and the non-orbiting scroll;a rotational shaft that orbits the orbiting scroll;a main bearing that supports the orbiting scroll;an elastic body that biases one of the non-orbiting scroll and the orbiting scroll so as to separate the non-orbiting scroll from the orbiting scroll; anda plurality of columnar members that are fixed at one ends of the columnar members and are movable at the other ends of the columnar members with respect to the main bearing and the non-orbiting scroll, the columnar members being ...

DRY VACUUM PUMP

A dry vacuum pump is provided, including an oil sump; a pumping stage; two rotating shafts respectively holding a rotor extending in the pumping stage, the rotor being configured to rotate in a synchronised manner in opposite directions in order to carry a gas to be pumped between an intake and a discharge of the pump, the two rotating shafts being supported by bearings lubricated by a lubricant contained in the oil sump; and a lubricant sealing device inserted between the oil sump and a pumping stage at each shaft passage, the sealing device including a disc-shaped deflector mounted on a shaft of the two rotating shafts for rotation therewith, and a disc of the deflector has an annular end on a periphery thereof, extending towards the pumping stage, forming a retaining recess. 113.-. (canceled)14. A dry vacuum pump , comprising:at least one oil sump;at least one pumping stage;two rotating shafts respectively holding at least one rotor extending in the at least one pumping stage, the at least one rotor being configured to rotate in a synchronised manner in opposite directions in order to carry a gas to be pumped between an intake and a discharge of the dry vacuum pump, the two rotating shafts being supported by bearings lubricated by a lubricant contained in the at least one oil sump; andat least one lubricant sealing device inserted between the at least one oil sump and a pumping stage of the at least one pumping stage at each shaft passage, the at least one lubricant sealing device including a generally disc-shaped deflector mounted on a shaft of the two rotating shafts for rotation therewith,wherein a disc of the generally disc-shaped deflector has an annular end on a periphery thereof, extending towards the at least one pumping stage, forming a retaining recess.15. The dry vacuum pump according to claim 14 , wherein the annular end has a generally cylindrical shape claim 14 , coaxial with an axis of rotation of the shaft of the two rotating shafts.16. The dry ...

VACUUM PUMP OF LIGHTWEIGHT CONSTRUCTION

A vacuum pump having a housing composed of light metal, in which a rotor composed of light metal is rotatably mounted. The rotor driving at least one vane, wherein the rotor is composed of light metal and has at least three different diameters along the axis of rotation thereof. 1. A vacuum pump having a housing composed of light metal , in which a rotor composed of light metal is rotatably mounted , said rotor driving at least one vane , wherein the rotor is composed of light metal and has at least three different diameters along the axis of rotation thereof.2. The vacuum pump according to claim 1 , wherein the rotor has a step which divides a bearing region from a sealing region.3. The vacuum pump according to claim 2 , wherein the step has an axial bearing surface and a radial and an axial sealing surface.4. The vacuum pump according to claim 1 , wherein the rotor has a reinforcing collar.5. The vacuum pump according to claim 1 , wherein the housing contains a sintered bushing as a bearing for the rotor.6. The vacuum pump according to claim 5 , wherein the sintered bushing has a cylindrical radial sintered bearing and a collar as an axial sintered bearing.7. The vacuum pump according to claim 6 , wherein the sintered bushing is a deep-drawn part or a turned part. This application claims the benefit and priority of German Application No. DE102015216104.8 filed Aug. 24, 2015. The entire disclosure of the above application is incorporated herein by reference.The invention relates to a vacuum pump of lightweight construction having aluminium components.This section provides background information related to the present disclosure which is not necessarily prior art.A vacuum pump having a drivable rotor, by means of which at least one vane in a housing can be made to rotate, is known from international publication WO 01/48381 A2. The rotor and/or the vane consist/s of aluminium or of an aluminium alloy. The rotor is produced by machining and by forming without ...

SCROLL PUMP TIP SEALING

A scroll pump tip seal to be fitted to a tip face of a scroll wall of a first scroll of a scroll pump to seal between said tip face and a base plate of a second scroll of the scroll pump. The tip seal is made of metal and has at least one internally disposed void. The metal tip seal may be made of a foamed metal defining a plurality of internally disposed voids. 1. A scroll pump comprising:an orbiting scroll;a fixed scroll; and 'wherein said orbiting scroll comprises an orbiting scroll base plate and an orbiting scroll wall extending from said orbiting scroll base plate towards said fixed scroll and said fixed scroll comprises a fixed scroll base plate and a fixed scroll wall extending from said fixed scroll base plate towards said orbiting scroll,', 'a driver configured to impart an orbiting motion to the orbiting scroll relative to the fixed scroll;'}said orbiting scroll wall has a tip face that faces said fixed scroll base plate and said fixed scroll wall has a tip face that faces said orbiting scroll base plate,said tip face of the orbiting scroll wall is provided with a first tip seal arrangement for sealing between the orbiting scroll wall and the fixed scroll base plate and said tip face of 'at least one of said first and second tip seal arrangements comprises a metal tip seal disposed on the respective tip face, and', 'the fixed scroll wall is provided with a second tip seal arrangement for sealing between the fixed scroll wall and the orbiting scroll plate,'}said metal tip seal comprises at least one internally disposed void.2. The scroll pump as claimed in claim 1 , wherein at least in part said metal tip seal comprises a metal foam defining a plurality of said voids.3. The scroll pump as claimed in claim 1 , wherein said metal tip seal comprises a hollow metal member.4. The scroll pump as claimed in claim 1 , wherein said metal tip seal comprises a plurality of metal seal segments disposed contiguously end to end.5. The scroll pump as claimed in claim 4 , ...

MOTOR OPERATED COMPRESSOR

A motor operated compressor according to the present embodiment may include a main housing; an electric motor unit; a rotation shaft; a fixed scroll coupled to an inner space of the main housing; an orbiting scroll provided that performs an orbiting movement with respect to the fixed scroll; a rear housing provided on an opposite side to the fixed scroll with the orbiting scroll therebetween and coupled to the main housing, and disposed with a first space to communicate with a discharge side of the compression chamber; and a first sealing portion provided to surround the first space to form a second space on an outer edge of the first space, wherein the second space includes a first region and a second region in fluid communication with each other. Accordingly, a horizontal motor operated compressor in which a frame and a fixed scroll are integrated may be provided. 1. A motor operated compressor , comprising:a main housing;a rear housing coupled to the main housing and comprising a first space;an electric motor unit disposed in an inner space of the main housing;a rotation shaft coupled to the electric motor unit and being configured to rotate;a fixed scroll disposed in the inner space of the main housing, the fixed scroll comprising a fixed end plate portion and a fixed wrap disposed on a side surface of the fixed end plate portion; engage with the fixed wrap to form a compression chamber having a discharge side in fluid communication with the first space, and', 'perform an orbiting movement with respect to the fixed scroll; and, 'an orbiting scroll disposed between the fixed scroll and the rear housing, the orbiting scroll comprising an orbiting end plate portion and an orbiting wrap disposed on a side of the orbiting end plate portion, the orbiting wrap being configured toa first sealing portion configured to surround the first space to form a second space on an outer edge of the first space, a first region disposed between an axial side surface of the orbiting ...

Scroll type device having liquid cooling through idler shafts

A scroll device is disclosed having a housing, a motor having a shaft, an orbiting scroll connected to the shaft for moving the orbiting scroll, a fixed scroll mated to the orbiting scroll, an idler shaft for aligning the orbiting scroll and the fixed scroll, an inlet formed in the housing and/or the fixed scroll for receiving a cooling liquid, and a channel formed in the idler shaft for receiving the cooling liquid.

Compressor Having Capacity Modulation Assembly

A compressor may include a shell, first and second scrolls, a seal assembly, a modulation control chamber, and a modulation control valve. The first scroll may include a first end plate having a biasing passage extending therethrough. The seal assembly may isolate a discharge pressure region from a suction pressure region. The seal assembly and the first scroll may define an axial biasing chamber therebetween that communicates with the axial biasing chamber and a first pocket between the first and second scrolls. The modulation control chamber may be fluidly coupled with the biasing chamber by a first passage. The modulation control valve may be fluidly coupled with the modulation control chamber by a second passage and movable between a first position allowing communication between the second passage and the suction pressure region and a second position restricting communication between the second passage and the suction pressure region. 1. A compressor comprising:a shell assembly defining a suction-pressure region and a discharge-pressure region, said shell assembly including a partition separating said suction-pressure region from said discharge-pressure region;a first scroll member disposed within said shell assembly and including a first end plate having a discharge passage, a modulation port, a biasing passage, and a first spiral wrap extending from said first end plate;a second scroll member disposed within said shell assembly and including a second end plate having a second spiral wrap extending therefrom, said first and second spiral wraps meshingly engaged and forming a series of pockets during orbital displacement of said second scroll member relative to said first scroll member, said modulation port in communication with a first one of said pockets, said biasing passage in communication with a second one of said pockets;a floating seal assembly engaged with said partition and said first scroll member and isolating said discharge-pressure region from said ...

SCROLL FLUID MACHINE

A scroll fluid machine includes fixed and orbiting scrolls which form a compression chamber; a land which divides the compression chamber into first-stage and second-stage compression chambers; a wrap groove formed in a spiral shape along a tip of a fixed wrap of the fixed scroll; an intermediate groove formed in the land; a seal member; and an intermediate seal member. The land includes a first-stage outlet communicating with the first-stage compression chamber and a second-stage inlet communicating with the second-stage compression chamber. The wrap groove includes an outer peripheral wrap groove adjacent to the land on a radially outward side and an inner peripheral wrap groove adjacent to the land on a radially inward side. The intermediate groove is in communication with the outer and inner peripheral wrap grooves. The seal member is fitted in the wrap groove except the outer and inner wrap grooves. The intermediate seal member includes an outer peripheral seal portion fitted in the outer peripheral wrap groove, an inner peripheral seal portion fitted in the inner peripheral wrap groove, and the intermediate seal portion fitted in the intermediate groove and connected to the outer and inner peripheral seal portions. 1. A scroll fluid machine comprising:a fixed scroll including a first mirror surface and a fixed wrap protruding in a spiral shape from the first mirror surface to form a compression chamber;an orbiting scroll including a second mirror surface opposed to the first mirror surface of the fixed scroll, and an orbiting wrap protruding in a spiral shape from the second mirror surface;a land located in such a position as to divide the compression chamber into a first-stage compression chamber and a second-stage compression chamber, the land including a first-stage outlet communicating with the first-stage compression chamber and a second-stage inlet communicating with the second-stage compression chamber;a wrap groove formed in a spiral shape along a tip ...

SCROLL COMPRESSOR

A scroll compressor of the present invention includes a partition plate , a fixed scroll , an orbiting scroll , a rotation-restraining member , a main bearing , a discharge space H, a ring-shaped first seal member and a ring-shaped second seal member . A pressure in the medium pressure space M is set lower than that in the discharge space H and higher than that in the low pressure space . The first seal member and the second seal member are sandwiched by the partition plate by means of a closing member , the fixed scroll can move in an axial direction of the fixed scroll between the partition plate and the main bearing . If a high pressure is applied to the discharge space H, the fixed scroll can be pressed against the orbiting scroll 16-. (canceled)7. scroll compressor comprising:a partition plate for partitioning an interior of a hermetic container into a high pressure space and a low pressure space;a fixed scroll which is adjacent to the partition plate;an orbiting scroll which is meshed with the fixed scroll and which forms compression chambers;a rotation-restraining member for preventing the orbiting scroll from rotating; anda main bearing for supporting the orbiting scroll, in whichthe fixed scroll, the orbiting scroll, the rotation-restraining member and the main bearing are placed in the low pressure space,the fixed scroll and the orbiting scroll are placed between the partition plate and the main bearing,the fixed scroll can move in an axial direction of the fixed scroll between the partition plate and the main bearing, whereinthe scroll compressor further includesa discharge space which is formed between the partition plate and the fixed scroll and which is in communication with the compression chamber,a ring-shaped first seal member placed on an outer periphery of the discharge space between the partition plate and the fixed scroll, anda ring-shaped second seal member placed on an outer periphery of the first seal member between the partition plate and ...

SCROLL COMPRESSOR

A scroll compressor is provided which comprises: a housing; a driving motor; an orbiting scroll rotated by the driving motor; a fixed scroll; a suction port provided-in the housing and suctioning a refrigerant; an oil separator in the housing at one side of the fixed scroll; and a discharge port for discharging, to the outside of the housing, the refrigerant from which oil is separated in the oil separator. The scroll compressor includes an intermediate housing; a back pressure chamber in the intermediate housing at one side of the orbiting scroll, first and second back pressure seal members in the intermediate housing; a plurality of anti-rotation rings in the intermediate housing; and a plurality of anti-rotation pins at the orbiting scroll to be inserted into each of the plurality of anti-rotation rings. 1. A scroll compressor including a housing , a driving motor accommodated in the housing , an orbiting scroll orbited by the driving motor , a fixed scroll disposed in the housing and forming a compression chamber together with the orbiting scroll , a suction port provided in the housing at one side of the driving motor and configured to suck refrigerant , an oil separator provided in the housing at one side of the fixed scroll and configured to separate oil from the refrigerant discharged from the fixed scroll , and a discharge not configured to discharge the refrigerant from which oil has been separated in the oil separator to an outside of the housing , the scroll compressor comprising:an intermediate housing disposed in the housing and rotatably supporting rotary shaft of the driving motor;a back pressure chamber provided in the intermediate housing at one side of the orbiting scroll;a first back pressure seal member disposed in the intermediate housing to surround as periphery of the back pressure chamber and configured to seal a gap between the orbiting scroll and the intermediate housing;a second back pressure seal member disposed in the intermediate ...

MOTOR-OPERATED COMPRESSOR

A motor-operated compressor includes a casing having a motor chamber that accommodates a driving motor. The compressor also includes a frame. A first scroll having a first spiral wrap is connected to one side of the frame. A second scroll is provided between the frame and the first scroll. The second scroll has a second spiral wrap that engages with the first spiral warp to form compression chambers between the first and second spiral wraps. The compressor also includes a rotation shaft connected at one end to the driving motor and at an opposite end to the second scroll. The compressor includes a back pressure space defined by a balance weight axially separated from a rear surface of the second scroll. A back pressure passage fluidly connects the compression chambers with the back pressure space. 1. A motor-operated compressor , comprising:a casing having a motor chamber;a frame provided adjacent one end of the motor chamber;a driving motor positioned on one side of the frame and accommodated in the motor chamber;a first scroll supported on an opposite side of the frame and having a first spiral wrap;a second scroll provided between the frame and the first scroll, the second scroll having a second spiral wrap engaged with the first spiral wrap, and forming compression chambers between the first and second wraps while performing an orbiting motion relative to the first scroll by receiving a rotational force of the driving motor;a rotation shaft having one end connected to a rotor of the driving motor and another end eccentrically coupled to the second scroll to transfer the rotational force of the driving motor to the second scroll;a balance weight coupled to the rotation shaft, one surface of the balance weight facing a rear surface of the second scroll;a sealing member provided between the rear surface of the second scroll and the one surface of the balance weight to form a back pressure space between the rear surface of the second scroll and the one surface of ...

CO-ROTATING SCROLL COMPRESSOR

This co-rotating scroll compressor is provided with: a first side plate () which is arranged on the side of a drive-side rotational axis direction (CL) with respect to a drive-side scroll member () and a driven-side scroll member (), a second side plate () fixed at a predetermined gap in the direction of the drive-side rotational axis (CL) with respect to the first side plate (), and a center plate () arranged between the first side plate () and the second side plate (). The first side plate () is fixed to the driven-side scroll member (), and the center plate () is fixed to the drive-side scroll member (). A synchronization drive mechanism equipped with a crank pin () is disposed between the first side plate () and second side plate () and the center plate (). 1. A co-rotating scroll compressor comprising:a drive-side scroll member driven to rotate around a rotational axis by a drive unit and having a spiral drive-side wall body disposed on a drive-side end plate;a driven-side scroll member in which a spiral driven-side wall body corresponding to the drive-side wall body is disposed on a driven-side end plate and the driven-side wall body meshes with the drive-side wall body to form a compression space;a synchronization drive mechanism transmitting a drive force of the drive unit to the driven-side scroll member such that the drive-side scroll member and the driven-side scroll member perform rotating motions in the same direction and at the same angular velocity;a first side plate disposed on the rotational axis direction side with respect to the drive-side scroll member and the driven-side scroll member;a second side plate fixed at a predetermined gap in the rotational axis direction with respect to the first side plate; anda center plate disposed between the first side plate and the second side plate, whereinthe first side plate is fixed to one of the drive-side scroll member and the driven-side scroll member,the center plate is fixed to the other of the drive- ...

Fluid-injected compressor installation

Fluid-injected compressor installation ( 1 ) which is provided with: a screw compressor ( 2 ) with a compression housing ( 4 ) in which a pair of compressor rotors ( 6 a, 6 b ) are mounted; a drive motor ( 3 ) with a motor housing ( 9 ) in which a motor shaft ( 11 ) is mounted which drives the compressor rotors ( 6 a, 6 b ); an inlet ( 7 ) and an outlet ( 8 ) on the screw compressor ( 2 ) for the supply of a gas and for the discharge of compressed gas; with the compression housing ( 4 ) and the motor housing ( 9 ) being directly joined to each other; characterised in that the compressor installation ( 1 ) is provided with: a gear transmission ( 20 ) between the shaft ( 16 ) of one of the compressor rotors ( 6 a, 6 b ) and the motor shaft ( 11 ), consisting of a driven gear ( 18 ) and a driving gear ( 19 ); a motor bearing ( 21 ) on the motor shaft ( 11 ) next to the driving gear ( 19 ), and a dynamic seal ( 25 ) next to the aforementioned motor bearing ( 21 ), on the drive motor ( 3 ) side, such that the motor bearing ( 21 ) is between the driving gear ( 19 ) and the seal ( 25 ).

Scroll compressor

A scroll compressor includes a housing having therein a discharge pressure region, a compression pressure region and a suction pressure region; a fixed scroll to form a discharge chamber as the discharge pressure region; and a movable scroll cooperating with the fixed scroll to form a compression chamber as the compression pressure region. The discharge pressure region includes an oil separation chamber connected to at least one of the compression pressure region and the suction pressure region through an oil supply passage having a flow restrictor. The flow restrictor is provided by a gap between an oil supply hole formed in the fixed scroll and an insertion member inserted in the oil supply hole. The gap is in the form of a spiral groove provided in at least one of an inner peripheral surface of the oil supply hole and an outer peripheral surface of the insertion member.

RESIN COMPOSITION AND SEAL MEMBER USING SAME

According to the present invention, a resin composition preferable for molding a sealing member superior in abrasion resistance at a high temperature, mountability on an axis and seal groove with deformation, and sealability can be provided. 1. A resin composition for a resin sealing member , comprising(b) 1 part by weight-7 parts by weight of a powder of a compound having a layer crystal structure, and(c) 8 parts by weight-27 parts by weight of a native polytetrafluoroethylene powder, per(a) 100 parts by weight of polyether sulfone.2. The resin composition according to claim 1 , whereinthe (b) powder of the compound having a layer crystal structure is a graphite powder.3. The resin composition according to claim 1 , which has a flexural modulus of not more than 3000 MPa claim 1 , as measured according to ASTM D790.4. The resin composition according to claim 1 , which shows an endurance time of not less than 6 hr and an abrasion amount of not more than 0.7 mm claim 1 , as measured according to a pin disc abrasion test under the conditions of atmospheric temperature: 120° C. and a rotation speed=3 m/s.5. The resin composition according to claim 1 , which shows a slide aspect temperature of not more than 220° C. under the pressure of 3 MPa claim 1 , as measured according to a pin disc abrasion test under the conditions of atmospheric temperature: 120° C. and a rotation speed=3 m/s.6. A resin sealing member obtained by molding the resin composition according to .7. The resin sealing member according to claim 6 , which is a seal ring.8. The resin sealing member according to claim 7 , wherein the seal ring is a square ring.9. The resin sealing member according to claim 7 , wherein the seal ring is a U seal.10. The resin sealing member according to claim 7 , which is a seal ring for a scroll compressor for air conditioners.11. The resin sealing member according to claim 6 , which is a dust seal.12. The resin composition according to claim 2 , which has a flexural modulus ...

Scroll fluid machine

In this scroll fluid machine, a tip seal ( 7 ) that is in contact with facing end plates ( 5 a ) and that is for sealing in a fluid is provided to a tip seal groove ( 3 d ) formed on the tooth tip of a wall ( 3 b ). The tooth bottoms of the end plates ( 5 a ) have a shape in which a central section is deeper than a side section ( 5 d 3 ) in a width direction orthogonal to the spiral direction of a wall ( 5 b ). During operation, the protrusion amount (δ) when the tip seal ( 7 ) protrudes from the tooth tip of the wall ( 3 b ) in an inclined section and is in contact with the facing end plates is greater than the protrusion amount (δ) when the tip seal ( 7 ) protrudes from the tooth tip of the wall ( 3 b ) in a flat section and is in contact with the facing end plates.

Scroll pump tip sealing

A scroll pump tip seal to be fitted to a tip face of a scroll wall of a first scroll of a scroll pump to seal between the tip face and a base plate of a second scroll of the scroll pump has a first end, a second end and a plurality of flexure formations. The flexure formations are at least partial discontinuities in the tip seal disposed at spaced apart intervals between the first and second ends of the tip to facilitate lateral flexure of the tip seal.

LIQUID COOLING OF A SCROLL TYPE COMPRESSOR WITH LIQUID SUPPLY THROUGH THE CRANKSHAFT

Scroll devices with cooling fluid supplied through a crankshaft are provided. The device may comprise an orbiting scroll operably connected to a fixed scroll and a crankshaft operably connected to the orbiting scroll. A first seal may be positioned about an outer surface of the crankshaft to form a seal with the outer surface. A second seal may be positioned about an outer surface of the crankshaft to form a seal with the outer surface. A first channel and a second channel extend through the crankshaft and are in fluid communication with the orbiting scroll and a fluid source and a fluid reservoir. 1. A scroll device comprising:an orbiting scroll operably connected to a fixed scroll;a crankshaft operably connected to the orbiting scroll, wherein the crankshaft extends along a longitudinal axis between a first end and a second end;a first seal positioned about an outer surface of the crankshaft to form a seal with the outer surface;a second seal positioned about an outer surface of the crankshaft to form a seal with the outer surface, wherein a first volume is at least partially defined by the first seal, and wherein a second volume is defined between the first seal and the second seal;a first channel extending through the crankshaft from the first end to the second end, the first channel comprising an opening in fluid communication with the first volume; anda second channel extending through the crankshaft from the first end to the second end, the second channel comprising an opening in fluid communication with the second volume.2. The scroll device of claim 1 , further comprising one or more idler shafts through which a cooling fluid can be transported to or from the orbiting scroll and at least one of the first channel and the second channel.3. The scroll device of claim 1 , further comprising one or more flexible conduits to transport a cooling fluid to or from the orbiting scroll and at least one of the first channel and the second channel.4. The scroll device ...

OIL-FREE SCREW COMPRESSOR

The oil-free screw compressor includes: a screw rotor including a screw and a shaft; a bearing; a first shaft seal device disposed between the screw and the bearing, the first shaft seal device including: a first seal and a first communication section configured to communicate the bearing side with respect to between the shaft and the first seal, and an outer peripheral face of the first shaft seal device; a second shaft seal device disposed between the first shaft seal device and the bearing, the second shaft seal device including: a second seal and a second communication section configured to communicate the screw side with respect to between the shaft and the second seal, and an outer peripheral face of the second shaft seal device; and a first seal member including a seal between the first communication section and the second communication section. The casing includes an atmosphere communication section configured to communicate the first communication section and the second communication section with an atmosphere. A sectional area in the first communication section is larger than a sectional area between the seal of the first seal member and the shaft. 1. An oil-free screw compressor comprising:a screw rotor including a screw and a shaft;a bearing supporting the shaft; a first seal opposite to the shaft, and', 'a first communication section configured to communicate the bearing side with respect to between the shaft and the first seal, and an outer peripheral face of the first shaft seal device;, 'a first shaft seal device fitted on the shaft, the first shaft seal device disposed between the screw and the bearing, the first shaft seal device including a second seal opposite to the shaft, and', 'a second communication section configured to communicate the screw side with respect to between the shaft and the second seal, and an outer peripheral face of the second shaft seal device;, 'a second shaft seal device fitted on the shaft, the second shaft seal device ...

SCREW COMPRESSOR, COMPRESSOR ELEMENT AND GEARBOX APPLIED THEREBY

A screw compressor comprising a compressor element with a housing in which two helical rotors are mounted on bearings by their shafts, and a gearbox—with a housing with a mounting surface that is built onto a mounting surface of the housing of the compressor element, and which is coupled in a torque-transmitting way to a shaft of at least one of the aforementioned rotors, whereby the compressor element is provided with an oil circuit with an input and an output for oil and a cooling jacket with an input and output for a coolant, wherein the aforementioned inputs and outputs for the oil and for the coolant are located in the aforementioned mounting surface of the housing of the compressor element, whereby these inputs and outputs connect to channels for the respective supply and removal of the oil and the coolant. 122-. (canceled)23. A screw compressor comprising a compressor element with a housing in which two helical rotors are mounted on bearings by their shafts , and a gearbox with a housing with a mounting surface that is built onto a mounting surface of the housing of the compressor element , and which is coupled in a torque-transmitting way to a shaft of at least one of the aforementioned rotors , whereby the compressor element is provided with an oil circuit with an input and an output for oil and a cooling jacket with an input and output for a coolant , wherein the aforementioned inputs and outputs for the oil and for the coolant are located in the aforementioned mounting surface of the housing of the compressor element , whereby these inputs and outputs are configured to connect to channels for the respective supply and removal of the oil and the coolant that are at least partially integrated internally in the gearbox.24. The screw compressor according to claim 23 , wherein the aforementioned mounting surfaces surround the shaft ends of the rotors at the side of the gearbox.25. The screw compressor according to claim 23 , wherein the shaft ends of the ...

SCROLL FLUID MACHINE, AND METHOD FOR PROCESSING SCROLL MEMBER

Provided is a scroll fluid machine which is capable of inhibiting contact between tooth tip corners and tooth bottom corners. The present invention is provided with: a wall inclined portion () of which a facing surface has a distance to an end plate which continuously decreases from the outer circumferential side to the inner circumferential side; and an end plate inclined portion (). Chamfered portions () are provided to tooth tip corners () of a tooth tip of a wall () which face tooth bottom corners () of bases of mating walls (). The chamfered portions () have a shape which avoids contact with step parts () which are formed at the tooth bottom, and which are adjacent to the tooth bottom corners (). 1. A scroll fluid machine comprising:a first scroll member in which a spiral first wall is provided on a first end plate;a second scroll member in which a spiral second wall is provided on a second end plate disposed to face the first end plate and the second wall meshes with the first wall such that the second scroll member performs a revolution orbiting movement relative to the first scroll member; andan inclined portion in which an inter-facing surface distance between the first end plate and the second end plate facing each other continuously decreases from outer peripheral sides of the first wall and the second wall toward inner peripheral sides thereof,wherein in a tooth tip of the wall, a chamfered portion is provided at a tooth tip corner facing a tooth bottom corner of a base of a meshing wall.2. The scroll fluid machine according to claim 1 ,wherein the chamfered portion has a shape which avoids a contact with a step portion formed at the tooth bottom corner.3. The scroll fluid machine according to claim 1 , further comprising:a wall flat portion which is provided on outermost peripheral portions and/or innermost peripheral portions of the first wall and the second wall and has a height which is not changed;an end plate flat portion which is provided on the ...

SCROLL COMPRESSOR

A scroll compressor includes fixed and movable scrolls, a crank shaft and a housing. An outer peripheral portion of a top surface of the housing has an accommodation portion recessed and accommodating an Oldham coupling preventing rotations of the movable scroll around an axis. The housing has inner and outer seal ring grooves in a top surface. Inner and outer seal rings are fitted in the grooves. A portion of the top surface of the housing defined by the inner and outer seal ring grooves is higher than a surface that is closer to the inner periphery of the housing than the inner seal ring groove, and a surface that is closer to an outer periphery of the housing than the outer seal ring groove. The portion of the top surface serves as a tilt limiting surface. 1. A scroll compressor , comprising:a fixed scroll;a movable scroll provided on a lower end of the fixed scroll and engaged with the fixed scroll;a crank shaft coupled to a back surface side of the movable scroll; anda housing disposed under the movable scroll and rotatably supporting the crank shaft,the movable scroll being movable due to rotations of the crank shaft while being pushed toward the fixed scroll due to a high pressure acting on the back surface side of the movable scroll,an outer peripheral portion of a top surface of the housing having an accommodation portion formed therein, the accommodation portion being recessed and accommodating an Oldham coupling preventing rotations of the movable scroll around an axis thereof, an inner seal ring groove with an inner seal fitted therein, and', 'an outer seal ring groove with an outer seal ring fitted therein,', 'the inner and out seal rings having different outer diameters,, 'the housing having, in a top surface thereof that is closer to an inner periphery of the housing than the accommodation portion, with'}a space on the back surface side of the movable scroll defined by the inner seal ring and the outer seal ring serving as a back pressure chamber into ...

TIP SEAL

A tip seal for scroll wraps in a scroll compressor is provided. The tip seal may include surface features to form a tortuous flow path in a seal groove of a scroll wrap. The surface features can help form one or more contraction and/or expansion areas in the tortuous flow path. The tortuous flow path can help provide resistance to fluid flow and help reduce leakage through the seal groove. 1. A tip seal for a scroll member in a scroll compressor , comprising:a first side along a length of the tip seal; anda second side along the length of the tip seal;wherein the first side includes surface features configured to provide resistance to a fluid flow when the fluid flow flows along the length of the tip seal, and the second side is configured to be pushed against a scroll member during operation of the scroll compressor to provide sealing.2. The tip seal of claim 1 , wherein the first side has a relatively rough side providing a tortuous path in a direction of the length of the first side.3. The tip seal of claim 1 , wherein the second side is relatively smooth compared to the first side.4. The tip seal of claim 1 , wherein the surface features include a plurality of protruding structural elements.5. The tip seal of claim 4 , wherein the plurality of structural elements have a width claim 4 , and the width of the plurality of protruding structural elements are perpendicular to the length of the tip seal claim 4 , and the plurality of protruding structural elements are spaced apart along the length of the tip seal.6. The tip seal of claim 4 , wherein the plurality of protruding structural elements include a rectangular shaped cross section.7. The tip seal of claim 4 , wherein the plurality of protruding structural elements include a tapered portion.8. The tip seal of claim 4 , wherein a cross section of the plurality of protruding structural elements includes a sloped first side and a sloped second side claim 4 , and the sloped first side is steeper than the sloped ...

ROTARY COMPRESSOR

In a rotary compressor, a refrigerant path hole communicates with a lower discharge chamber concave portion while at least a part thereof overlaps the lower discharge chamber concave portion, is positioned between a lower vane groove and a first insertion hole in a lower cylinder, and is configured of a plurality of holes which are disposed between the upper vane groove and the first insertion hole in the upper cylinder, and a sectional area of a cross section which is closest to the lower vane groove and the upper vane groove of the plurality of holes is the smallest compared to the sectional area of the cross section of the other holes. 1. A rotary compressor which includes a sealed vertically-placed cylindrical compressor housing which is provided with a discharge pipe that discharges a refrigerant in an upper portion thereof , which is provided with an upper inlet pipe and a lower inlet pipe that suction the refrigerant in a lower portion of a side surface thereof , an accumulator which is connected to the upper inlet pipe and the lower inlet pipe that are fixed to a side portion of the compressor housing , a motor which is disposed in the compressor housing , and a compressing unit which is disposed below the motor in the compressor housing , is driven by the motor , suctions and compresses the refrigerant from the accumulator via the upper inlet pipe and the lower inlet pipe , and discharges the refrigerant from the discharge pipe , and in which the compressing unit includes an annular upper cylinder and an annular lower cylinder , an upper end plate which blocks an upper side of the upper cylinder and a lower end plate which blocks a lower side of the lower cylinder , an intermediate partition plate which is disposed between the upper cylinder and the lower cylinder and blocks the lower side of the upper cylinder and the upper side of the lower cylinder , a rotation shaft which is supported by a main bearing unit provided on the upper end plate and a sub- ...

Scroll-Type Fluid Machine with Grease-Lubricated Orbiting Bearing

A scroll-type fluid machine reduces intrusion of abrasion powders, generated by sliding of a conductor causing an orbiting scroll side and a fixed scroll side to be conducted, into a compression chamber, and improves reliability of a compressor. The scroll-type machine includes a casing, a fixed scroll having a flange surface attached to the casing, and a wrap portion provided at an end plate, an orbiting scroll having a wrap portion provided at the end plate, and provided in an opposed relationship with the fixed scroll, a drive shaft connected through a crank portion to the orbiting scroll, an orbiting bearing, a face seal portion arranged between the orbiting scroll and the fixed scroll, a cooling fan, and an orbiting scroll side conductive brush. 1. A scroll-type fluid machine comprising:a casing;a fixed scroll having a flange surface attached to the casing, and a wrap portion provided on a surface of an end plate;an orbiting scroll having a wrap portion provided on a surface of the end plate, and provided in an opposed relationship with the fixed scroll, and orbiting with respect to the casing;a back surface plate provided at the back surface of the orbiting scroll,a drive shaft connected through a crank portion to the orbiting scroll and performing rotation-drive;an orbiting bearing causing the drive shaft to be supported on the orbiting scroll;a face seal portion arranged between the orbiting scroll and the fixed scroll;a cooling fan supplying cooling air into an interior of the casing;a plurality of compression chambers which are defined between the wrap portion of the fixed scroll and the wrap portion of the orbiting scroll; anda conductor causing the orbiting scroll and the casing to be conducted by causing the back surface plate and the casing to be conducted.2. The scroll-type fluid machine according to claim 1 , wherein the conductor is arranged at a position except a position at which abrasion powders produced by the conductor sliding relative to a ...

COMPRESSOR HAVING SOUND ISOLATION FEATURE

Scroll compressor designs are provided to minimize vibration, sound, and noise transmission. The scroll compressor has a bearing housing, and orbiting and non-orbiting scroll members. The non-orbiting scroll member has a radially extending flanged portion with at least one aperture substantially aligned with the axially extending bore. At least one fastener is disposed within the aperture and the bore. A sound isolation member contacts at least one of the non-orbiting scroll member, the fastener, or the bearing housing, to reduce or eliminate noise transmission. The sound isolation member may be formed of a polymeric composite having an acoustic impedance value greater than the surrounding materials. The sound isolation member may be an annular washer, an O-ring, or a biasing member, by way of non-limiting example. In other variations, fluid passages are provided within the fastener and/or bearing housing to facilitate entry of lubricant oil to further dampen sound and noise. 1. A scroll compressor comprising:a bearing housing including at least one radially extending arm having an axially extending bore;an orbiting scroll member including a first end plate and a first scroll wrap extending from the first end plate;a non-orbiting scroll member having a first acoustic impedance value, and including a second end plate, a second scroll wrap extending from the second end plate and meshingly engaged with the first scroll wrap, and a radially extending flanged portion comprising at least one axially extending aperture substantially aligned with the axially extending bore;at least one fastener disposed within the at least one axially extending aperture and the axially extending bore; and{'sup': '−3', 'a sound isolation member disposed between at least a portion of the fastener and at least a portion of the non-orbiting scroll member, wherein the sound isolation member comprises a composite material comprising a polymer and a plurality of particles, the composite material ...

Compressor Having Capacity Modulation Assembly

A compressor may include a shell, first and second scrolls, a seal assembly, a modulation control chamber, and a modulation control valve. The first scroll may include a first end plate having a biasing passage extending therethrough. The seal assembly may isolate a discharge pressure region from a suction pressure region. The seal assembly and the first scroll may define an axial biasing chamber therebetween that communicates with the axial biasing chamber and a first pocket between the first and second scrolls. The modulation control chamber may be fluidly coupled with the biasing chamber by a first passage. The modulation control valve may be fluidly coupled with the modulation control chamber by a second passage and movable between a first position allowing communication between the second passage and the suction pressure region and a second position restricting communication between the second passage and the suction pressure region. 1. A compressor comprising:a shell assembly defining a suction-pressure region and a discharge-pressure region, said shell assembly including a partition separating said suction-pressure region from said discharge-pressure region;a first scroll member disposed within said shell assembly and including a first end plate having a discharge passage, a modulation port, and a first spiral wrap extending from said first end plate;a second scroll member disposed within said shell assembly and including a second end plate having a second spiral wrap extending therefrom, said first and second spiral wraps meshingly engaged and forming a series of pockets during orbital displacement of said second scroll member relative to said first scroll member, said modulation port in communication with a first one of said pockets;a floating seal assembly engaged with said partition and isolating said discharge-pressure region from said suction-pressure region, said floating seal assembly defining an axial biasing chamber containing intermediate-pressure ...

LIQUID RING VACUUM PUMP

The present invention relates to a two-stage liquid ring vacuum pump in which two-stage impellers are attached to an axial end portion of a main shaft (rotating shaft) of a motor. The two-stage liquid ring vacuum pump includes a first-stage impeller () provided in a first-stage pump chamber (), a second-stage impeller () provided in a second-stage pump chamber (), a single rotating shaft () to which the first-stage impeller () and the second-stage impeller () are fixed, and an exhaust port (Pd) of the first-stage pump chamber () and an intake port (Ps) of the second-stage pump chamber () which communicate with each other. An outer diameter of the first-stage impeller () is larger than an outer diameter of the second-stage impeller (). 1. A two-stage liquid ring vacuum pump comprising:a first-stage impeller provided in a first-stage pump chamber;a second-stage impeller provided in a second-stage pump chamber;a single rotating shaft to which the first-stage impeller and the second-stage impeller are fixed; andan exhaust port of the first-stage pump chamber and an intake port of the second-stage pump chamber which communicate with each other;wherein an outer diameter of the first-stage impeller is larger than an outer diameter of the second-stage impeller.2. The two-stage liquid ring vacuum pump according to claim 1 , wherein an axial width of the first-stage impeller is equal to or larger than an axial width of the second-stage impeller.3. The two-stage liquid ring vacuum pump according to claim 1 , wherein an outer diameter of a housing portion of a casing for housing the first-stage impeller is larger than an outer diameter of a housing portion of the casing for housing the second-stage impeller.4. The two-stage liquid ring vacuum pump according to claim 1 , wherein an outer diameter of a boss portion of the first-stage impeller is equal to or larger than an outer diameter of a boss portion of the second-stage impeller.5. The two-stage liquid ring vacuum pump ...

Vapor injection device and compressor

Provided are a vapor injection device and a compressor. The vapor injection device includes an injector valve plate, an injector plate, and an injector reed valve. One side of the injector plate facing toward the injector valve plate is provided with an avoidance groove. A guide post is disposed protruding from one side of the injector plate facing away from the injector valve plate. The guide post is inserted into a fixed scroll of the compressor and provided with an injection channel. A vapor injection inlet cavity is formed between the rear housing, the injector valve plate, and the fixed scroll. The injector reed valve is disposed between the injector valve plate and the injector plate and attaches to the injector valve plate, the injector reed valve is provided with a movable sheet, and the movable sheet, the injector valve plate and the avoidance groove form a one-way valve structure.

SCROLL COMPRESSOR

A scroll compressor includes a housing, a fixed scroll, and a movable scroll. A compression chamber is formed between the movable scroll and the fixed scroll. An opposing wall is located in and fixed to the housing. A back pressure region is formed between the opposing wall and the movable scroll, and a back pressure in the back pressure region urges the movable scroll toward the fixed scroll. An annular sealing member is arranged between the movable scroll and the opposing wall. The movable scroll includes a holding portion that holds the sealing member. The sealing member includes a rubber portion, which elastically deforms in the holding portion, and a resin portion, which is made of a material harder than the rubber portion. The resin portion at least partially projects out of the holding portion toward the opposing wall. The resin portion is in contact with the opposing wall. 1. A scroll compressor comprising:a housing;a fixed scroll located in and fixed to the housing;a movable scroll that orbits with respect to the fixed scroll, wherein a compression chamber is formed between the movable scroll and the fixed scroll;an opposing wall located in and fixed to the housing, wherein a back pressure region is formed between the opposing wall and the movable scroll, and a back pressure in the back pressure region urges the movable scroll toward the fixed scroll; andan annular sealing member arranged between the movable scroll and the opposing wall, whereinthe movable scroll includes an end surface that faces the opposing wall and includes a holding portion, wherein the holding portion holds the sealing member,the sealing member includes a rubber portion, which elastically deforms in the holding portion, and a resin portion, which is made of a material harder than the rubber portion,the resin portion at least partially projects out of the holding portion toward the opposing wall, andthe resin portion is in contact with the opposing wall.2. The scroll compressor ...

Scroll type device having liquid cooling through idler shafts

A scroll device is disclosed having a housing, a motor having a shaft, an orbiting scroll connected to the shaft for moving the orbiting scroll, a fixed scroll mated to the orbiting scroll, an idler shaft for aligning the orbiting scroll and the fixed scroll, an inlet formed in the housing and/or the fixed scroll for receiving a cooling liquid, and a channel formed in the idler shaft for receiving the cooling liquid. 1. A scroll device comprising:a housing;a motor having a shaft;an orbiting scroll connected to the shaft for moving the orbiting scroll;a fixed scroll mated to the orbiting scrollan idler shaft for aligning the orbiting scroll and the fixed scroll;an inlet formed in the housing for receiving a cooling liquid; anda channel formed in the idler shaft for receiving the cooling liquid.2. A scroll device comprising:a housing;a motor having a shaft;an orbiting scroll connected to the shaft for moving the orbiting scroll;a fixed scroll mated to the orbiting scrollan idler shaft for aligning the orbiting scroll and the fixed scroll;an inlet formed in the fixed scroll for receiving a cooling liquid; anda channel formed in the idler shaft for receiving the cooling liquid.3. A scroll device comprising:a housing;a motor having a shaft;an orbiting scroll connected to the shaft for moving the orbiting scroll;a fixed scroll mated to the orbiting scroll;an idler shaft for aligning the orbiting scroll and the fixed scroll;a bearing for supporting the idler shaft;an inlet formed in the housing for receiving a cooling liquid;a channel formed in the idler shaft for receiving the cooling liquid; anda radial shaft seal for preventing any cooling liquid to leak into the bearing.4. A scroll device comprising:a housing;a motor having a shaft;an orbiting scroll connected to the shaft for moving the orbiting scroll;a fixed scroll mated to the orbiting scroll;an idler shaft for aligning the orbiting scroll and the fixed scroll;a bearing for supporting the idler shaft;an inlet ...

SCROLL COMPRESSOR

This scroll compressor is a scroll compressor provided with a housing and a scroll compression mechanism provided inside the housing, the interior of the housing being provided with an discharge cavity for discharge high-pressure gas compressed by the scroll compression mechanism, wherein: the housing is configured from a front housing and a rear housing for closing the rear-end opening of the front housing; a fixed scroll is integrally molded on the rear housing with a rib part interposed therebetween; the discharge cavity, into which an discharge port for discharging high-pressure gas opens, is provided around the periphery of the rib part; and an discharge valve for opening and closing the discharge port is installed in the discharge cavity. 1. A scroll compressor comprising: a housing; and a scroll compression mechanism which is accommodated and installed inside the housing ,wherein an discharge cavity for discharging a high-pressure gas compressed by the scroll compression mechanism is formed inside the housing,wherein the housing is configured of a front housing and a rear housing which closes a rear-end opening of the front housing,wherein a fixed scroll configuring the scroll compression mechanism is integrally molded on the rear housing via a rib part, andwherein an discharge cavity to which an discharge port for discharging the high-pressure gas opens is provided around the rib part, and an discharge valve for opening and closing the discharge port is provided inside the discharge cavity.2. The scroll compressor according to claim 1 ,wherein the discharge cavity is separated from an intake cavity side by a first seal member which is interposed between an end-plate outer periphery of the fixed scroll and an inner periphery of the front housing, and the discharge cavity is separated from the atmosphere side by a second seal member which is interposed between the rear housing and the rear-end opening of the front housing, or a welding structure which is ...

ELECTRIC COMPRESSOR

An electric compressor includes a housing including a compression part housing, a shaft support housing, and a motor housing fastened by a plurality of fastening members. A peripheral wall has a plurality of thick-walled portions that protrudes inwardly in a radial direction and through which their associated fastening members are inserted. The fixed scroll base plate has a plurality of protruded portions each protruding outwardly in the radial direction and disposed between the thick-walled portions in a circumferential direction. The fixed scroll base plate has a plurality of pillar portions each extending from the protruded portions toward the shaft support housing in the axial direction and spaced from each other in the circumferential direction. The elastic plate is held at a plurality of spots by the plurality of pillar portions and the shaft support housing. 1. An electric compressor comprising:a housing;a drive shaft rotatably supported in the housing;an electric motor rotating the drive shaft;a fixed scroll fixed to the housing, the fixed scroll including a fixed scroll base plate and a fixed scroll wall extending from the fixed scroll base plate;a movable scroll connected to the drive shaft and supported in the housing so as to make an orbital motion around a drive shaft axis, the movable scroll including a movable scroll base plate facing the fixed scroll base plate and a movable scroll wall meshed with the fixed scroll wall;a compression chamber defined between the fixed scroll and the movable scroll;an elastic plate having a ring shape and urging the movable scroll toward the fixed scroll;the housing including a compression part housing that has a peripheral wall having a tubular shape and extending in the axial direction of the drive shaft so as to surround the fixed scroll, a shaft support housing that supports the drive shaft, and a motor housing that accommodates the electric motor; anda plurality of fastening members extending in the axial ...

SCROLL PUMP

The present invention provides a scroll pump comprising: a scroll mechanism having an orbiting scroll and a fixed scroll; a drive shaft having a concentric shaft portion and an eccentric shaft portion connected to the orbiting scroll. The shaft is arranged to be driven by a motor so that rotation of the shaft imparts an orbiting motion to the orbiting scroll relative to the fixed scroll for pumping fluid along a flow path from an inlet to an outlet of the scroll mechanism. An axial lip seal is located between the orbiting scroll and the fixed scroll for resisting leakage of fluid from outside the scroll mechanism into the flow path. 1. A scroll pump comprising:a scroll mechanism comprising an orbiting scroll and a fixed scroll; anda drive shaft comprising a concentric shaft portion and an eccentric shaft portion connected to the orbiting scroll, the drive shaft being arranged to be driven by a motor so that rotation of the drive shaft imparts an orbiting motion to the orbiting scroll relative to the fixed scroll for pumping fluid along a flow path from an inlet to an outlet of the scroll mechanism, wherein an axial lip seal is located between the orbiting scroll and the fixed scroll for resisting leakage of fluid from outside the scroll mechanism into the flow path.2. The scroll pump of claim 1 , wherein the axial lip seal is fixed relative to one of the orbiting scroll or the fixed scroll and seals against the other of the orbiting scroll or the fixed scroll so that an orbiting motion is imparted to the lip seal relative to the other scroll.3. The scroll pump of claim 1 , wherein the axial lip seal extends across an axial gap between the orbiting scroll and the fixed scroll.4. The scroll pump of claim 1 , wherein the inlet of the scroll mechanism is located at a radially outer portion of the scroll mechanism and the outlet of the scroll mechanism is located at a radially inner portion of the scroll mechanism claim 1 , and wherein the axial lip seal is located ...

SCROLL COMPRESSOR

A scroll compressor includes: a frame configured to support a second scroll by being coupled to a first scroll; a sealing member insertion groove formed in a ring shape, on at least one of one side surface of the second scroll and one side surface of the frame contacting the second scroll; and a sealing member formed in a ring shape, inserted into the sealing member insertion groove, and configured to divide an interval between the second scroll and the frame in a radial direction, wherein the sealing member is formed such that a sectional surface of an inner circumferential surface thereof is smaller than that of an outer circumferential surface thereof, and such that a second gap between the outer circumferential surface of the sealing member and an outer side wall surface of the sealing member insertion groove is smaller than or equal to a first gap between the inner circumferential surface of the sealing member and an inner side wall surface of the sealing member insertion groove. 1. A scroll compressor , comprising:a first scroll;a second scroll which forms a compression chamber together with the first scroll while performing an orbiting movement with respect to the first scroll;a frame configured to support the second scroll by being coupled to the first scroll;a sealing member insertion groove formed in a ring shape, on at least one of one side surface of the second scroll and one side surface of the frame contacting the second scroll; anda sealing member formed in a ring shape, inserted into the sealing member insertion groove, and configured to divide an interval between the second scroll and the frame in a radial direction,wherein the sealing member is formed such that a sectional surface of an inner circumferential surface thereof is smaller than that of an outer circumferential surface thereof, and such that a second gap between the outer circumferential surface of the sealing member and an outer side wall surface of the sealing member insertion groove ...

POLYMERIC COMPOSITE INSERT COMPONENT FOR A SCROLL COMPRESSOR

A polymeric composite insert component for a scroll compressor comprises a polymer and at least one reinforcing or lubricating particle. The insert component comprises an annular body and an axial projection. The annular body comprises a first annular inner surface defining a first centrally-disposed opening having a central axis. The annular body has a first side configured to engage a partition plate and a second side configured to engage a floating seal assembly. The axial projection extends from the first side of the annular body. The axial projection is configured to engage the partition plate. The insert component is configured to fluidly seal first and second interfaces during operation of the compressor. The first interface is defined between the first contact surface and the partition plate. The second interface defined between the second contact surface and the floating seal assembly. 1. A polymeric composite insert component for a scroll compressor comprising a polymer and at least one reinforcing or lubricating particle , the polymeric composite insert component comprising:an annular body comprising a first annular inner surface defining a first centrally-disposed opening that has a central axis extending therethrough, the annular body having a first side and a second side opposite the first side, the first side comprising a first contact surface configured to engage a partition plate and the second side comprising a second contact surface configured to engage a floating seal assembly; andan axial projection extending from the first side of the annular body, the axial projection being configured to engage the partition plate, wherein the polymeric composite insert component is configured to fluidly seal both a first interface defined between the first contact surface and the partition plate, and a second interface defined between the second contact surface and the floating seal assembly during operation of the scroll compressor.2. The polymeric composite ...

SCROLL COMPRESSOR

A scroll compressor includes: a scroll unit ; a crank mechanism ; a housing in which the scroll unit is accommodated and which has a suction port of refrigerant provided in an outer peripheral wall located on the outer peripheral side of the scroll unit ; and a sealing device which seals between the housing and a rotary shaft , wherein the housing includes: a crank chamber in which the crank mechanism is positioned; a seal chamber in which the sealing device is positioned; a communication hole which communicates the crank chamber with the seal chamber ; and a first guide groove which extends from an opening of the communication hole in the seal chamber to the vicinity of the sealing device 2. The scroll compressor according to claim 1 , whereinthe housing further includes a second guide groove in which an opening of the communication hole in the crank chamber is positioned.3. (canceled)4. The scroll compressor according to claim 1 , whereinthe communication hole is inclined along a circling direction of the counterweight with respect to a radial direction of the rotary shaft.5. The scroll compressor according to claim 1 , whereinthe counterweight has an inclined surface inclined with respect to an axis of the rotary shaft.6. The scroll compressor according to claim 1 , whereinthe counterweight has a stepped surface protruding in a radial direction of the rotary shaft. The present invention relates to a scroll compressor, and particularly to a scroll compressor for use in a refrigeration circuit of an air conditioner for vehicles.Patent Document 1 discloses a scroll compressor including: a fixed scroll and a movable scroll accommodated in a housing, the housing supporting a rotary shaft via a bearing; and a shaft seal mechanism fitted between the rotary shaft and the housing, in which a communication passage for communicating the seal chamber with the side of a suction chamber of refrigerant is formed as lubricating means of the shaft seal mechanism.Patent Document 1 ...

HERMETIC COMPRESSOR

A hermetic compressor is provided that may include a cylinder having an inner circumferential surface which forms a compression chamber formed in an elliptical shape; a roller provided to be eccentric from the inner circumferential surface of the cylinder, and configured to change a volume of the compression chamber by being rotated; and at least one vane formed to be withdrawn towards the inner circumferential surface of the cylinder when the roller is rotated, and configured to divide the compression chamber into a plurality of spaces. When it is assumed that on the basis of a contact point where the inner circumferential surface of the cylinder and an outer circumferential surface of the roller are closest to each other, and a first center line passing through a center of the cylinder, an ellipse positioned at a first side of the first center line and forming the inner circumferential surface of the cylinder is defined as a first ellipse, a center point of the first ellipse is defined as a first center point, an ellipse positioned at a second side of the first center line and forming the inner circumferential surface of the cylinder is defined as a second ellipse, a center point of the second ellipse is defined as a second center point, under these assumptions, the first center point and the second center point are spaced apart from the center of the cylinder. 1. A hermetic compressor , comprising:a cylinder having an inner circumferential surface, which forms a compression chamber, formed in an elliptical shape;a roller provided to be eccentric from the inner circumferential surface of the cylinder, and configured to change a volume of the compression chamber by being rotated; andat least one vane formed to be withdrawn towards the inner circumferential surface of the cylinder when the roller is rotated, and configured to divide the compression chamber into a plurality of spaces, wherein when it is assumed that on the basis of a contact point where the inner ...

Scroll Vacuum Pump and Method of Maintenance Including Replacing a Tip Seal of a Scroll Vacuum Pump

A scroll pump has a tip seal between an axial end of the scroll blade of one of stationary and orbiting plate scrolls of the pump and the plate of the other of the stationary plate and orbiting plate scrolls. The scroll pump may have a ballast gas supply system and use the operation of the ballast gas supply system to assess the condition of the tip seal. Alternatively, the scroll pump may have two pressure sensors that sense pressure at two locations spaced along a compression mechanism of the pump to assess the condition of the tip seal. 1. A method of operating and maintaining a scroll vacuum pump , the method comprising:running the scroll pump while the pump is connected to a system, at an inlet of the scroll pump, to discharge fluid from the system;while the scroll pump is discharging fluid from the system, sensing a first pressure proportional to a first fraction of the compression ratio of the pump and a second pressure proportional to a second fraction of the compression ratio of the pump;calculating a monitored pressure value based on both the first and second sensed pressures;comparing the monitored pressure value based on the first and second sensed pressures with a reference pressure value; andchanging a tip seal, interposed between an axial end of a scroll blade of one of stationary and orbiting plate scrolls and a plate of the other of the stationary plate and orbiting plate scrolls of the scroll pump, at a point in time after the monitored pressure value and the reference pressure value differ by at least a predetermined amount.2. The method of claim 1 , further comprising periodically supplying a ballast gas into a compression mechanism of the scroll pump at a location adjacent a downstream end of the compression mechanism with respect to the direction of fluid flow through the pump claim 1 , while the scroll pump is being run to discharge fluid from the system claim 1 ,the compression mechanism constituted by a series of pockets of the scroll pump ...

SCROLL COMPRESSOR AND REFRIGERATION CYCLE APPARATUS

A scroll compressor includes a crank shaft, an orbiting scroll, and a frame. The crank shaft has a lubricant channel allowing lubricant to flow through the lubricant channel. The orbiting scroll is attached to the crank shaft and includes a base plate that is discoidal. The frame has a thrust surface against which the orbiting scroll slides. The thrust surface has an annular shape and faces an outer circumferential region of one surface of the base plate of the orbiting scroll. The orbiting scroll has an inner channel and a lubricant channel groove. The inner channel allows the lubricant supplied through the crank shaft to flow outward. The lubricant channel groove has an annular shape in the outer circumferential region of the one surface of the base plate facing the thrust surface and allows the lubricant supplied through the inner channel to be supplied to the thrust surface. The lubricant channel groove is formed such that the lubricant channel groove stays within a region of the thrust surface while the orbiting scroll is orbiting. 1. A scroll compressor comprising:a crank shaft having a lubricant channel allowing lubricant to flow through the lubricant channel;an orbiting scroll attached to the crank shaft and including a base plate that is discoidal; anda frame having a thrust surface against which the orbiting scroll slides,the thrust surface having an annular shape and facing an outer circumferential region of one surface of the base plate of the orbiting scroll,the orbiting scroll having an inner channel allowing the lubricant supplied through the crank shaft to flow outward and a lubricant channel groove having an annular shape in the outer circumferential region of the one surface of the base plate facing the thrust surface and allowing the lubricant supplied through the inner channel to be supplied to the thrust surface, andthe lubricant channel groove being formed such that the lubricant channel groove stays within a region of the thrust surface while ...

HIGH SUCTION PRESSURE SINGLE SCREW COMPRESSOR WITH THRUST BALANCING LOAD USING SHAFT SEAL PRESSURE AND RELATED METHODS

A high suction pressure thrust load balance assembly configured for use with a single screw compressor includes comprises a sealing baffle that is keyed to, so as to be rotatable along with, a main rotor drive shaft of the single screw compressor. The sealing baffle is configured to create a force or load to counteract the axial force of the main rotor drive shaft created during rotation of the main rotor drive shaft using the pressurized oil used to lubricate the mechanical shaft seal of the compressor. 1. A high suction pressure thrust load balance assembly configured for use with a single screw compressor comprising a sealing baffle that is keyed to , so as to be rotatable along with , a main rotor drive shaft of the single screw compressor , wherein the sealing baffle is configured to create a force or load to counteract an axial force of the main rotor drive shaft created during rotation of the main rotor drive shaft.2. The high suction pressure thrust load balance assembly of claim 1 , wherein the assembly is positioned in an area between one or more roller bearings and one or more seals.3. The high suction pressure thrust load balance assembly of claim 2 , wherein the single screw compressor comprises one or more shaft bearings and the high suction pressure load balance assembly is structured to aid in preventing excessive load on the one or more shaft bearings during operation of the compressor under a high input or suction pressure condition.4. The high suction pressure load balance assembly of claim 3 , wherein the high input or suction pressure condition is about greater than or equal to 300 psi.5. The high suction pressure load balance assembly of claim 4 , wherein the high input or suction pressure condition is from about greater than or equal to 300 psi to about 800 psi.6. The high suction pressure load balance assembly of claim 4 , wherein the high input or suction pressure condition is about greater than or equal to 500 psi.7. The high suction ...

SCROLL COMPRESSOR

A scroll compressor in which a winding angle of a first lap is larger than a winding angle of a second lap, a plurality of compression chambers are formed between the first lap and the second lap, the compression chambers include at least a first compression chamber and a second compression chamber that has a volume smaller than the first compression chamber, a first base plate is provided with a first injection port for injection of refrigerant into the first compression chamber and a second injection port for injection of refrigerant into the second compression chamber, and an injection flow rate of the second injection port is higher than an injection flow rate of the first injection port. 1. A scroll compressor comprising:a shell configured as a hermetic container forming an enclosure;a compression mechanism section provided in the shell and configured to compress refrigerant; andan injection pipe configured to inject the refrigerant to inside of the shell,the compression mechanism section including a stationary scroll and an orbiting scroll, the stationary scroll including a first base plate and a first wrap, the first wrap being provided to erect along an involute curve on one surface of the first base plate, the orbiting scroll including a second base plate and a second wrap, the second wrap being provided to erect along an involute curve on one surface of the second base plate,the first wrap having a winding angle larger than a winding angle of the second wrap,the first wrap and the second wrap being configured to form a plurality of compression chambers between the first wrap and the second wrap, each of the compression chambers having a volume smaller than volumes of compression chambers formed radially outward thereof,the compression chambers including at least a first compression chamber and a second compression chamber, the second compression chamber having a volume smaller than a volume of the first compression chamber,the first base plate being ...

SCROLL COMPRESSOR

A scroll compressor may include an orbiting scroll having an orbiting scroll wall extending axially from an orbiting scroll plate towards a fixed scroll; a fixed scroll having a fixed scroll wall extending axially from a fixed scroll plate towards the orbiting scroll; and an axially extending drive shaft having an eccentric shaft portion so that rotation of the eccentric shaft portion imparts an orbiting motion to the orbiting scroll relative to the fixed scroll. An axial end portion of the orbiting scroll wall has a first seal for sealing between the orbiting scroll wall and the fixed scroll plate, and an axial end portion of the fixed scroll wall has a second seal for sealing between the fixed scroll wall and the orbiting scroll plate; and the first seal or the second seal has an aspect ratio of axial length to radial width which is 1.25:1 or greater. 1. A scroll compressor comprising:an orbiting scroll having an orbiting scroll wall extending axially from an orbiting scroll plate towards a fixed scroll;a fixed scroll having a fixed scroll wall extending axially from a fixed scroll plate towards the orbiting scroll, wherein the orbiting scroll has an orbiting scroll wall extending axially from an orbiting scroll plate towards the fixed scroll; and an axial end portion of the orbiting scroll wall has a first seal for sealing between the orbiting scroll wall and the fixed scroll plate, and an axial end portion of the fixed scroll wall has a second seal for sealing between the fixed scroll wall and the orbiting scroll plate;', 'a first portion of at least one of the first or second seal has a first aspect ratio of an axial length to a radial width and a second portion of the at least one of the first or second seal has a second aspect ratio of the axial length to the radial width; and', 'both the first aspect ratio and the second aspect ratio are at least 1.25:1., 'an axially extending drive shaft having an eccentric shaft portion so that rotation of the eccentric ...

ROTARY COMPRESSOR

The present disclosure may provide a compressor in which an outer circumferential side cross-sectional area of a vane slot is formed to be smaller than an inner circumferential side cross-sectional area thereof to decrease an area receiving a force in a roller direction by a vane so as to reduce a contact force between the roller and the vane, and a gas accommodation portion capable of selectively forming a suction pressure and an intermediate pressure is formed between the vane and the vane slot to appropriately control a contact force between the vane and the roller, and a contact surface of the vane facing the roller is broadly formed at a side of a compression chamber to appropriately reduce a contact force between the roller and the vane, and a space portion forming a discharge pressure is formed at least either one side of a side surface of the vane and a cylinder corresponding thereto to decrease a side directional reaction force applied to the vane, thereby reducing a mechanical friction loss between the vane and the cylinder. 1. A compressor , comprising:a drive motor;a rotating shaft configured to transfer a rotational force of the drive motor;a cylinder provided at one side of the drive motor;a roller provided on the rotating shaft to rotate, and allow at least two or more portions on an outer circumferential surface thereof to face an inner circumferential surface of the cylinder to form at least two compression spaces in the cylinder; andat least two or more vanes configured to face an outer circumferential surface of the roller to partition the two or more compression spaces into a suction chamber and a compression chamber, respectively,wherein at least two or more vane slots having an inner surface are formed in the cylinder to face both side surfaces of the vane, anda space portion recessed by a predetermined depth is formed between the vane slot and a side surface of the vane corresponding thereto.2. The compressor of claim 1 , wherein a slot side ...

SCROLL COMPRESSOR

A scroll compressor is provided. The scroll compressor may include a casing including a rotational shaft, a discharge cover fixed at an inside of the casing to partition the inside of the casing into a suction space and a discharge space, a first scroll rotated by the rotational shaft to perform an orbiting motion, a second scroll disposed on or at a side of the first scroll to define a plurality of compression chambers together with the first scroll, the second scroll having an intermediate pressure discharge hole that communicates with a compression chamber having an intermediate pressure among the plurality of compression chambers, a back pressure plate coupled to the second scroll, the back pressure plate having an intermediate pressure suction hole that communicates with the intermediate pressure discharge hole, a floating plate movably disposed on or at a side of the back pressure plate to define a back pressure chamber together with the back pressure plate, and a discharge guide defined in the first scroll or the second scroll to guide discharge of a refrigerant within the back pressure chamber. 1. A scroll compressor , comprising:a casing comprising a rotational shaft;a discharge cover fixed at an inside of the casing to partition the inside of the casing into a suction space and a discharge space;a first scroll rotated by the rotational shaft to perform an orbiting motion;a second scroll disposed at a side of the first scroll to define a plurality of compression chambers together with the first scroll, the second scroll having an intermediate pressure discharge hole that communicates with a compression chamber having an intermediate pressure of the plurality of compression chambers;a back pressure chamber assembly coupled to the second scroll, the back pressure chamber assembly having an intermediate pressure suction hole that communicates with the intermediate pressure discharge hole and defining a back pressure chamber; anda discharge guide defined in the ...

COMPRESSOR

A compressor includes a casing with an oil retention space, an electric motor, a driveshaft, a compression mechanism, an oil supply passage, an oil discharge passage, an oil supply pump, and an oil discharge pump. The compression mechanism has a movable part, and an upper housing forming a crank chamber. The upper housing has an upper bearing that pivotally supports the driveshaft below the crank chamber. The oil supply passage leads oil in the oil retention space to the crank chamber. The oil discharge passage includes a main oil discharge passage, and a first inflow passage communicating between the main oil discharge passage and the crank chamber. An oil-recovery space is formed in a lower part of the upper housing below the crank chamber. The oil discharge passage includes a second inflow passage communicating between the main oil discharge passage and the oil-recovery space. 1. A compressor , comprising:a casing with an oil retention space being formed at a bottom of the casing;an electric motor accommodated in the casing;a driveshaft extending vertically and connected to the electric motor; a movable part connected to the drive shaft to be driven by the electric motor, and', 'an upper housing forming a crank chamber internally accommodating a connecting portion that connects an eccentric part of the driveshaft and the movable part, and the upper housing having an upper bearing that pivotally supports the driveshaft below the crank chamber;, 'a compression mechanism, accommodated in the casing, and having'}an oil supply passage leading oil in the oil retention space to the crank chamber, the oil supply passage being formed in the driveshaft; a main oil discharge passage that extends in an axial direction in the driveshaft, and', 'a first inflow passage communicating between the main oil discharge passage and the crank chamber;, 'an oil discharge passage including'}an oil supply pump configured to supply oil in the oil retention space to the oil supply passage; ...

Scroll Vacuum Pump and Method of Maintenance Including Replacing a Tip Seal of a Scroll Vacuum Pump

A scroll pump has a tip seal between an axial end of the scroll blade of one of stationary and orbiting plate scrolls of the pump and the plate of the other of the stationary plate and orbiting plate scrolls. The scroll pump may have a ballast gas supply system and use the operation of the ballast gas supply system to assess the condition of the tip seal. Alternatively, the scroll pump may have two pressure sensors that sense pressure at two locations spaced along a compression mechanism of the pump to assess the condition of the tip seal.

Motor operated compressor

An electric compressor includes a first scroll, a second scroll engaged with the first scroll and configured to form a compression chamber between portions of the second scroll and the first scroll during orbiting motion of the second scroll relative to the first scroll, and a frame fixed on an opposite side of the second scroll from the first scroll. A back-pressure space is formed between the frame and the second scroll, and pressure in the back-pressure space pushes the second scroll toward the first scroll. A back-pressure passage connects the compression chamber and the back-pressure space, and a valve member is disposed in the back-pressure passage and selectively blocks movement of a fluid from the back-pressure space to the compression chamber.

Method And Device For Fixing And Synchronising Rotary Pistons In A Rotary Piston Pump

A method and a device for fixing and synchronising rotary pistons in a rotary piston pump are disclosed. The rotary pistons are introduced into the pump space of the rotary piston pump. A shaft stub of each rotary piston is then pushed through a pump rear wall onto a driveshaft provided for the respective rotary piston. The rotary pistons are aligned and synchronised in the pump space by means of a template, the template being fixed detachably to a pump housing. The shaft stubs of the respective rotary piston are connected, after the synchronisation, in each case by means of a clamping device in a friction-locked manner to the respective driveshaft, outside the pump space. 1. A method for fixing and synchronising rotary pistons in a rotary piston pump , characterised in thatthe rotary pistons are introduced into a pump space of the rotary piston pump;a shaft stub of each rotary piston is pushed through a pump rear wall and onto a driveshaft provided for the respective rotary piston;the rotary pistons are aligned and synchronised with a template, the template being fixed detachably to a pump housing andthe shaft stubs of the respective rotary piston are connected, after the synchronisation, in each case by means of a clamping device in a friction-locked manner to the respective driveshaft outside the pump space.2. The method according to claim 1 , characterised in that claim 1 , before the introduction of the rotary pistons into the pump space claim 1 , seals are pushed detachably onto the shaft stubs of the rotary pistons and are fixed there.3. The method according to claim 1 , characterised in that the template is placed on the rotary pistons by means of guides.4. The method according to claim 1 , characterised in that the spacing that is required for a lining and for a pump lid after installation of the rotary pistons is simulated by at least two spacers on the inner side of the template and by protrusions on the guides.5. The method according to claim 1 , ...

Scroll compressor

A compressor may include non-orbiting scroll, an orbiting scroll, and a bearing housing. The non-orbiting scroll may include a recess. The orbiting scroll may be intermeshed with the non-orbiting scroll to from a plurality of compression pockets therebetween. The orbiting scroll may include first and second apertures. The first aperture may communicate with one of the compression pockets. The second aperture may communicate with the recess. The bearing housing may support the orbiting scroll and cooperate with the orbiting scroll to define a chamber therebetween. The chamber may communicate with the first and second apertures.

A 3 DIRECTIONAL ROTARY SEAL FOR FLUID HANDLING MACHINES

A rotary seal () for a fluid handling machine comprising first circular body () with circumferential surface () and second circular body () with similar surface (), such that the bodies when coaxially assembled, the circumferential surface () and similar surface () mate with each other forming a sealing surface contact. An internal end face () of rotary seal () is exposed to fluids with an inclination, such that the fluid pressure on internal end face () adds to contact force at sealing contact surface. The first circular body () is continuous and second circular body () with a split () has a spring characteristic such that two ends formed by the split (), force away from each other, hence exerting a radial force on circumferential surface when assembled with first circular body () and compensating for circumferential wear during operation. The second circular body () exerts combination of axial, radial and tangential forces on circumferential surface () which results in force closure at sealing surface contact. 110. A rotary seal () for a fluid handling machine comprising:{'b': 12', '28', '12', '16', '27', '16', '16', '12', '28', '27', '12', '16', '30', '36', '33', '10', '33, 'a first circular body () with a circumferential surface () that has an inclination to the central axis of said first circular body () and a second circular body () with a similar surface () that is inclined to the central axis of said second circular body () such that said second circular body () when assembled with said first circular body () coaxially, said circumferential surface () and said similar surface () mate with each other forming a sealing surface contact, wherein said first circular body () and said second circular body () is mounted on said fluid handling machine that constitute a rotor part () and a stator part (), such that an internal end face () of said rotary seal () when assembled on fluid handling machine is exposed to fluids handled by said fluid handling machine, ...

COMPRESSOR

A compressor includes a rotary shaft, a rotating body, which rotates together with the rotary shaft, and a fixed body, which does not rotate together with the rotary shaft. The rotating body has a rotating body surface, and the fixed body has a fixed body surface facing the rotating body surface in the axial direction. The compressor includes a vane, which is inserted in a vane groove provided in the rotating body, and a compression chamber, which is defined by the rotating body surface and the fixed body surface. The vane includes a vane body, which is inserted in the vane groove, and a tip seal, which is movable in the axial direction relative to the vane body. 1. A compressor comprising:a rotary shaft;a rotating body that is configured to rotate together with the rotary shaft and includes a rotating body surface, which intersects with an axial direction of the rotary shaft, and a vane groove and;a fixed body that is configured not to rotate together with the rotary shaft and includes a fixed body surface, which faces the rotating body surface in the axial direction;a vane that is inserted in the vane groove and configured to rotate together with the rotating body while moving in the axial direction; anda compression chamber that is defined by the rotating body surface and the fixed body surface and in which suction and compression of fluid is performed when the vane rotates while moving in the axial direction, wherein a vane body inserted in the vane groove, and', 'a sealing member attached to an end face in the axial direction of the vane body so as to be movable in the axial direction relative to the vane body,, 'the vane includes'}a back pressure space is located between the sealing member and the vane body, andthe sealing member is configured to be pressed by the back pressure space toward the fixed body surface so as to be in contact with the fixed body surface.2. The compressor according to claim 1 , wherein a first part chamber located on a trailing side ...

AIR GAP MAGNETIC COUPLING WITH COUNTERBALANCED FORCE

A magnetic coupling assembly includes a first balancing magnet positioned and surrounding drive magnets and, across a gap, a second balancing magnet and surrounding driven magnets. The drive magnets when rotated drive the driven magnets to rotate. The balancing magnets generate a repulsive force, which counterbalances an attractive force generated by the drive magnets and driven magnets. The assembly may be utilized in a pump for contactless coupling of a motor shaft to a pump shaft. The driven side of the assembly may be hermetically sealed, such as with a liquid crystal polymer boundary interposed in the gap. 1. A magnetic coupling assembly , comprising:a drive shaft rotatable on a drive axis;a driven shaft rotatable on the drive axis;a drive magnet assembly coupled to the drive shaft and rotatable therewith, the drive magnet assembly comprising a first balancing magnet positioned on the drive axis, and a drive magnet coaxially positioned with the first balancing magnet; anda driven magnet assembly coupled to the driven shaft and rotatable therewith, the driven magnet assembly comprising a second balancing magnet disposed on the drive axis, and a driven magnet coaxially positioned with the second balancing magnet, wherein:the drive magnet assembly is spaced from the driven magnet assembly by an axial gap, with the first balancing magnet facing the second balancing magnet across the axial gap, and the drive magnet facing the driven magnet across the axial gap;the drive magnet and the driven magnet are configured to drive rotation of the driven magnet in response to rotation of the drive magnet, and to generate a tangential drive force and an axial attractive force between the drive magnet and the driven magnet; andthe first balancing magnet and the second balancing magnet are configured to generate an axial repulsive force between the first balancing magnet and the second balancing magnet that counterbalances the axial attractive force.2. The magnetic coupling ...

Motor-driven compressor and cooling system

A motor-driven compressor is installed in a fuel cell vehicle to supply air to a fuel cell. The motor driven compressor includes a rotation shaft, an electric motor, a compression unit that compresses air, a housing that includes a motor chamber and a compression chamber, and a seal member that restricts a flow of a fluid between the motor chamber and the compression chamber. The housing includes an inlet and an outlet. The inlet draws, into the motor chamber, the air-conditioning refrigerant that has passed through the evaporator but has not reached the air-conditioning compressor as a low-temperature refrigerant. The outlet discharges the low-temperature refrigerant, which is drawn from the inlet into the motor chamber, out of the motor chamber.

OIL-FREE SCREW COMPRESSOR AND DESIGN METHOD THEREFOR

The oil-free screw compressor includes: a casing having a rotor chamber; a bearing supporting rotary shafts of screw rotors; a shaft seal device with an oil seal portion and an air seal portion; a ventilation gap positioned between the oil seal portion and the air seal portion; and an atmosphere open passage communicating an atmosphere side of the casing with the ventilation gap communicate. A most narrowed portion, an air seal portion, and oil seal portions are set such that the followings is established: 1. An oil-free screw compressor comprising:a pair of female and male screw rotors which meshes with each other in a non-contact manner;a casing having a rotor chamber in which the screw rotors are housed;a bearing which supports rotary shafts of the screw rotors;a shaft seal device which includes an oil seal portion disposed on a bearing side and an air seal portion disposed on a rotor chamber side and shaft-seals the rotary shaft;a ventilation gap which is positioned between the oil seal portion and the air seal portion and is formed between an outer peripheral surface of the rotary shaft and an inner peripheral surface of the shaft seal device; andan atmosphere open passage which makes an atmosphere side of the casing and the ventilation gap communicate with each other, whereinassuming an effective open cross-sectional area as Sh and an effective narrowed length as Lh in a most narrowed portion where the atmosphere open passage is most narrowed, andassuming a shaft seal cross-sectional area in a direction orthogonal to a rotary shaft as Sa and an effective shaft seal length as La in a fine gap in the air seal portion,assuming an absolute value of a negative pressure in the rotor chamber during an unloading operation as |P2|, andassuming a minimum differential pressure in the oil seal portion during the unloading operation as ΔPb, {'br': None, 'i': La/Sa', 'Lh/Sh', 'P', 'Pb, 'sup': 2.5', '2.5, '()/()>|2|/Δ'}, 'the most narrowed portion, the air seal portion and ...

SCROLL COMPRESSOR

A scroll compressor according to the present invention includes a partition plate that partitions a sealed container into a high-pressure space and a low-pressure space, a fixed scroll adjacent to the partition plate, a orbiting scroll, a rotation restrictor, and a main bearing. The sealed scroll compressor further includes a pillar member having a lower end portion secured in a bearing-side engagement portion provided in the main bearing, and an upper end portion inserted in a scroll-side engagement portion provided in the fixed scroll. The axial distance from the upper end portion of the pillar member to the partition plate is smaller than the length by which the pillar member and the bearing-side engagement portion are coupled together. 1. A scroll compressor comprising:a partition plate that partitions an inside of a sealed container into a high-pressure space and a low-pressure space;a fixed scroll adjacent to the partition plate;an orbiting scroll that meshes with the fixed scroll to form a compression chamber;a rotation restrictor that prevents rotation of the orbiting scroll;a main bearing that supports the orbiting scroll, the fixed scroll, the orbiting scroll, the rotation restrictor, and the main bearing being disposed in the low-pressure space, and the fixed scroll and the orbiting scroll being disposed between the partition plate and the main bearing;a bearing-side engagement portion provided in the main bearing;a scroll-side engagement portion provided in the fixed scroll; anda pillar member having a lower end portion secured in the bearing-side engagement portion and an upper end portion inserted in the scroll-side engagement portion,wherein an axial distance from the upper end portion of the pillar member to the partition plate is smaller than a length by which the pillar member and the bearing-side engagement portion are coupled together.2. The scroll compressor according to claim 1 , wherein the pillar member is securely press fit in the bearing- ...

Internal Gear Pump

An internal gear pump for a hydraulic vehicle brake system comprises a pump shaft, a pinion positioned on the pump shaft, an annulus configured to mesh with the pinion, a shaft bearing positioned on one side of the pinion, and an axial disk. The pinion is configured to conjointly rotate with the pump shaft. The pump shaft is rotatable mounted in the shaft bearing. The axial disk is positioned between the shaft bearing on one end side, and the pinion and the annulus on an opposite end side, and bears sealingly against the pinion and the annulus. The shaft bearing is configured to center the axial disk.

High Suction Pressure Single Screw Compressor with Thrust Balancing Load Using Shaft Seal Pressure and Related Methods

A high suction pressure thrust load balance assembly configured for use with a single screw compressor includes comprises a sealing baffle that is keyed to, so as to be rotatable along with, a main rotor drive shaft of the single screw compressor. The sealing baffle is configured to create a force or load to counteract the axial force of the main rotor drive shaft created during rotation of the main rotor drive shaft using the pressurized oil used to lubricate the mechanical shaft seal of the compressor. 1. A high suction pressure thrust load balance assembly configured for use with a single screw compressor , the high suction pressure thrust load balance assembly comprising a sealing baffle that is keyed to , so as to be rotatable along with , a main rotor drive shaft of the single screw compressor , wherein the sealing baffle is configured to create a force or load to counteract an axial force of the main rotor drive shaft created during rotation of the main rotor drive shaft.2. The high suction pressure thrust load balance assembly of claim 1 , wherein the assembly is positioned in an area between one or more roller bearings and one or more seals.3. The high suction pressure thrust load balance assembly of claim 2 , wherein the single screw compressor comprises one or more shaft bearings and the high suction pressure load balance assembly is structured to aid in preventing an excessive load on the one or more shaft bearings during an operation of the compressor under a high input or suction pressure condition.4. The high suction pressure load balance assembly of claim 3 , wherein the high input or suction pressure condition is greater than or equal to about 300 psi.5. The high suction pressure load balance assembly of claim 4 , wherein the high input or suction pressure condition is from greater than or equal to about 300 psi to about 800 psi.6. The high suction pressure load balance assembly of claim 4 , wherein the high input or suction pressure condition is ...

SCROLL COMPRESSOR

Disclosed is a scroll compressor including stationary and movable scroll members engaged with each other. The stationary scroll member defines first and second air inlets and first and second air outlets. A first compression path is formed between the first air inlet outlet, and a second compression path is formed between the second air inlet outlet. The scroll compressor further includes a bypass passage for selectively communicating, at least one of the first and second compression paths with a suction pressure area of the compressor. First and second back pressure cavities are formed on a side of the stationary scroll member facing away from the movable scroll member. The first back pressure cavity is in communication with the first compression path by means of a first back pressure passage. The second back pressure cavity is in communication with the second compression path by means of a second back pressure passage 1. A scroll compressor comprising a non-orbiting scroll member and an orbiting scroll member intermeshing with each other , the non-orbiting scroll member being provided with a first suction port , a second suction port , a first discharge port and a second discharge port , a first compression path being formed between the first suction port and the first discharge port , and a second compression path being formed between the second suction port and the second discharge port , whereinthe compressor further comprises a bypass passage for selectively communicating at least one of the first compression path and the second compression path with a suction pressure region of the compressor, anda first back pressure chamber and a second back pressure chamber are formed on a side of the non-orbiting scroll member facing away from the orbiting scroll member, wherein the first back pressure chamber communicates with the first compression path through a first back pressure passage, and the second back pressure chamber communicates with the second compression ...

SCROLL COMPRESSOR

A scroll compressor is provided that may include a casing including a rotational shaft, a cover fixed inside of the casing to partition the inside of the casing into a suction space and a discharge space, a first scroll revolved by rotation of the rotational shaft, a second scroll disposed on or at one side of the first scroll to define a compression chamber together with the first scroll, the second scroll including a discharge, through which a refrigerant pressed in the compression chamber may be discharged, a switching device movably disposed on or at one side of the discharge to selectively open and close the discharge, a back pressure portion including a moving guide that accommodates at least a portion of the switching device, and a top surface that covers one side of the switching device; and an adhesion preventer that reduces a contact area between the switching device and at least a portion of the back pressure portion. 1. A scroll compressor , comprising:a casing comprising a rotational shaft;a cover fixed inside of the casing to partition an inner space of the casing into a suction space and a discharge space;a first scroll that is revolved by rotation of the rotational shaft;a second scroll disposed on or at one side of the first scroll to define a compression chamber together with the first scroll, wherein the second scroll comprises a discharge hole through which a refrigerant compressed in the compression chamber is discharged;a switching device movably disposed on or at one side of the discharge hole to selectively open and close the discharge hole;a back pressure portion comprising a moving guide that accommodates at least a portion of the switching device and a top surface that covers one side of the switching device; andan adhesion preventer to reduce a contact area between the switching device and at least a portion of the back pressure portion.2. The scroll compressor according to claim 1 , wherein the adhesion preventer comprises a recess ...

SCROLL COMPRESSOR

A scroll compressor is provided that may include a first scroll, a second scroll that defines a plurality of compression chambers together with the first scroll, the second scroll having a discharge hole that communicates with a compression chamber among the plurality of compression chambers, a back pressure plate that defines a back pressure chamber to accommodate a refrigerant discharged from the discharge hole, a floating plate to define the back pressure chamber, and a sealing member to prevent the refrigerant from flowing between a first surface, which may be a sliding surface of the floating plate, and a second surface, which may face the first surface, of the back pressure plate. The sealing member may include a seal cover that contacts the other one of the first and second surfaces, and a seal, a portion of which may be accommodated in the seal cover. The seal cover may have a friction coefficient less than a friction coefficient of the seal. 1. A scroll compressor , comprising:a casing comprising a rotational shaft;a discharge cover fixed inside of the casing to partition the inside of the casing into a suction space and a discharge space;a first scroll that is revolved by rotation of the rotational shaft;a second scroll that defines a plurality of compression chambers together with the first scroll, the second scroll having an intermediate pressure discharge hole that communicates with a compression chamber having an intermediate pressure of the plurality of compression chambers;a back pressure plate that defines a back pressure chamber that accommodates a refrigerant discharged from the intermediate pressure discharge hole;a floating plate movably disposed on or at a side of the back pressure plate to define the back pressure chamber together with the back pressure plate; anda sealing member disposed on one of first and second surfaces to prevent the refrigerant from flowing between the first surface, which is a sliding surface of the floating plate, and ...

SCROLL COMPRESSOR

A scroll compressor is provided that may include a motor; an orbiting scroll; a fixed scroll coupled to the orbiting scroll, and forming a compression chamber together with the orbiting scroll; a frame coupled to the fixed scroll, and configured to support the orbiting scroll; a sealing member mounting groove having a ring shape, and formed on a first surface of the frame contacting the orbiting scroll, or a second surface of the orbiting scroll contacting the frame; and a sealing member including a first sealing portion formed in a ring shape, inserted into the sealing member mounting groove so as to be moveable in an axial direction, and configured to perform a sealing operation between the frame and the orbiting scroll in the axial direction and including a second sealing portion extending from the first sealing portion in the axial direction, and configured to perform a sealing operation between the frame and the orbiting scroll in a radial direction by contacting an outer side wall surface of the sealing member mounting groove A thickness of the second sealing portion in the radial direction may be smaller than a thickness of the first sealing portion in the axial direction. 1. A scroll compressor , comprising:a motor that provides a drive force;an orbiting scroll driven by the motor to perform an orbiting motion;a fixed scroll coupled to the orbiting scroll, and forming a compression clamber together with the orbiting scroll;a frame coupled to the fixed scroll, and configured to support the orbiting scroll;a sealing member mounting groove, having a ring shape, and formed on a first surface of the frame that contacts the orbiting scroll, or a second surface of the orbiting scroll that contacts the frame; anda sealing member including a first sealing portion formed in a ring shape, inserted into the sealing member mounting groove so as to be moveable in an axial direction, and configured to perform a sealing operation between the frame and the orbiting scroll in ...

COMPRESSOR HAVING CAPACITY MODULATION SYSTEM

A compressor may include first and second scrolls, a seal assembly and a valve ring. The first scroll may include a first end plate having a discharge passage, a modulation port, and a biasing passage. The modulation port may be in communication with a first pocket formed between spiral wraps of the first and second scrolls. The biasing passage may be in communication with a second pocket formed between spiral wraps of the first and second scrolls. The modulation valve ring is axially displaceable relative to the seal assembly and the first scroll between first and second positions. The valve ring may abut an end plate of the first scroll and close the modulation port when in the first position. The valve ring may abut an axially-facing surface of the seal assembly and is spaced apart from the end plate to open the modulation port when in the second position. 1. A compressor comprising:a shell assembly defining a suction-pressure region and a discharge-pressure region, the shell assembly including a partition separating the suction-pressure region from the discharge-pressure region;a first scroll member disposed within the shell assembly and including a first end plate having a discharge passage, a modulation port, a biasing passage, and a first spiral wrap extending from the first end plate;a second scroll member disposed within the shell assembly and including a second end plate having a second spiral wrap extending therefrom, the first and second spiral wraps meshingly engaged and forming a series of pockets during orbital displacement of the second scroll member relative to the first scroll member, the modulation port in communication with a first one of the pockets, the biasing passage in communication with a second one of the pockets;a floating seal assembly engaged with the partition and the first scroll member and isolating the discharge-pressure region from the suction-pressure region; anda modulation valve ring located axially between the floating seal ...

Scroll compressor

A scroll compressor includes a fixed scroll, an orbiting scroll, a suction section, a discharge section, and an electric motor. A sliding surface of a scroll is formed outside a wrap with a depression section depressed with respect to a sliding surface and a flange section elevated with respect to the depression section. The flange section is a remaining region in a protruding region disposed outside a referential perfect circle, the remaining region being other than a region continuing to an end of an involute curve of a scroll formed with the flange section, the referential perfect circle having a radius set to a distance between the center of the scroll formed with the flange section and the end of the involute curve. The scroll compressor enhances reduction of the sliding loss with a simple structure and reduction of the refrigerant leakage loss in the entire compression chambers.

SCROLL COMPRESSOR

A scroll compressor includes a housing and a compression mechanism accommodated in the housing. The housing includes a first housing member having an annular partition wall and a second housing member. The partition wall includes a fastened portion that is thicker than other portions in a circumferential direction of the partition wall. The compression mechanism includes a fixed scroll member and an orbiting scroll member. The fixed scroll member includes a fixed spiral wall extending spirally and an outer circumferential wall that surrounds the fixed spiral wall. The outer circumferential wall includes a recess forming portion having a recess recessed inward in the radial direction. The recess is located at a part of the outer circumferential wall opposed to the fastened portion in the radial direction. 1. A scroll compressor comprising:a housing having a suction port and a discharge port; anda compression mechanism accommodated in the housing, wherein the compression mechanism is configured to compress fluid drawn in from the suction port and discharge the fluid out of the discharge port, wherein a first housing member having an annular partition wall, and', 'a second housing member fastened to the first housing member by a fastener, wherein the first housing member and the second housing member internally define a space,, 'the housing includes'}the partition wall includes a fastened portion through which the fastener is inserted, wherein the fastened portion is thicker than other portions in a circumferential direction of the partition wall,the fastened portion protrudes inward in a radial direction in the space, a fixed scroll member accommodated in the space, and', 'an orbiting scroll member accommodated in the space, wherein the orbiting scroll member is engaged with the fixed scroll member to define a compression chamber,, 'the compression mechanism includes'} a fixed spiral wall extending spirally, and', 'an outer circumferential wall that surrounds the ...

COMPRESSOR HAVING CAPACITY MODULATION SYSTEM

A compressor may include first and second scrolls, a seal assembly and a valve ring. The first scroll may include a first end plate having a discharge passage, a modulation port, and a biasing passage. The modulation port may be in communication with a first pocket formed between spiral wraps of the first and second scrolls. The biasing passage may be in communication with a second pocket formed between spiral wraps of the first and second scrolls. The modulation valve ring is axially displaceable relative to the seal assembly and the first scroll between first and second positions. The valve ring may abut an end plate of the first scroll and close the modulation port when in the first position. The valve ring may abut an axially-facing surface of the seal assembly and is spaced apart from the end plate to open the modulation port when in the second position. 1. A compressor comprising:a shell assembly defining a suction-pressure region and a discharge-pressure region, the shell assembly including a partition separating the suction-pressure region from the discharge-pressure region;a first scroll member disposed within the shell assembly and including a first end plate having a discharge passage, a modulation port, a biasing passage, and a first spiral wrap extending from the first end plate;a second scroll member disposed within the shell assembly and including a second end plate having a second spiral wrap extending therefrom, the first and second spiral wraps meshingly engaged and forming a series of pockets during orbital displacement of the second scroll member relative to the first scroll member, the modulation port in communication with a first one of the pockets, the biasing passage in communication with a second one of the pockets;a floating seal assembly engaged with the partition and the first scroll member and isolating the discharge-pressure region from the suction-pressure region;a modulation valve ring located axially between the floating seal ...

SCROLL COMPRESSOR

A scroll compressor includes a housing, a rotary shaft, a movable scroll, an eccentric shaft, an opposed wall, a looped elastic plate, a looped support portion, an annular protrusion, a back pressure chamber, and a back pressure supplying groove. The distance in the radial direction of the rotary shaft from the rotation axis of the rotary shaft to then outer end of the back pressure supplying groove in the radial direction of the rotary shaft is shorter than or equal to the distance obtained by subtracting the distance in the radial direction of the rotary shaft between the rotation axis of the rotary shaft and the axis of the eccentric shaft from the distance in the radial direction of the rotary shaft from the axis of the eccentric shaft to the part of the protrusion that contacts the elastic plate. 1. A scroll compressor comprising:a housing;a rotary shaft that is rotationally supported by the housing;a stationary scroll that includes a stationary base plate and a stationary volute wall extending from the stationary base plate, the stationary scroll being fixed to the housing; a movable base plate that is opposed to the stationary base plate, and', 'a movable volute wall that extends from the movable base plate toward the stationary base plate and meshes with the stationary volute wall,', 'wherein the movable scroll is capable of orbiting with respect to the stationary scroll;, 'a movable scroll including'}an eccentric shaft that protrudes toward the movable scroll from a position in the rotary shaft eccentric from a rotation axis, the eccentric shaft supporting the movable scroll;an opposed wall that is located on an opposite side of the movable base plate to the stationary base plate;an elastic plate that is disposed between the movable base plate and the opposed wall and urges the movable scroll toward the stationary scroll;a looped support portion that is provided on an opposed surface of the opposed wall that is opposed to the elastic plate, the support ...

Compressor Having Bushing

A compressor includes a non-orbiting scroll, an orbiting scroll, a driveshaft, a bearing housing and a bushing. The non-orbiting scroll includes a first spiral wrap. The orbiting scroll includes an end plate having a first side and a second side. The first side has a second spiral wrap that extends therefrom and meshingly engages with the first spiral wrap of the non-orbiting scroll. The second side has a hub extending therefrom. The driveshaft has a crankpin that is received in the hub and that drives the orbiting scroll. The bushing includes a first member and a second member. The first member is disposed within the hub of the orbiting scroll between the hub and the crankpin of the driveshaft. The second member extends radially from the first member and is disposed between the hub and the bearing housing. 1. A compressor comprising:a non-orbiting scroll including a first spiral wrap;an orbiting scroll including an end plate having a first side and a second side, the first side having a second spiral wrap extending therefrom and meshingly engaged with the first spiral wrap of the non-orbiting scroll to create fluid pockets therebetween; the second side having a hub extending therefrom;a driveshaft having a crankpin received in the hub and driving the orbiting scroll;a bearing housing; anda bushing including a first member and a second member, the first member disposed within the hub of the orbiting scroll between the hub and the crankpin of the driveshaft, the second member extending radially from an axial end of the first member and disposed between an axial end of the hub and a surface of the bearing housing.2. The compressor of claim 1 , wherein the orbiting scroll and the bearing housing cooperate to define a biasing chamber.3. The compressor of claim 2 , wherein the bearing housing includes an annular recess formed in the surface thereof claim 2 , and wherein a sealing member is received in the annular recess formed in the surface of the bearing housing.4. The ...

SCROLL COMPRESSION DEVICE HAVING A SEALING DEVICE, AND SCROLL COMPRESSOR INCLUDING SUCH A SCROLL COMPRESSION DEVICE

The scroll compression device includes a first scroll element () having a first base plate () and a first spiral wrap (); a second scroll element () having a second base plate () and a second spiral wrap (), one of the first and second scroll elements () being configured to perform an orbiting movement in relation to the other one of the first and second scroll elements, the first and second scroll elements () intermeshing with each other and delimiting compression chambers (); and a sealing device () arranged in an end face () of the first spiral wrap () and having a sealing surface configured to cooperate with the second base plate (). The sealing device () is configured to allow fluid flow from an upstream compression chamber to a downstream compression chamber through the sealing surface when the pressure in the upstream compression chamber exceeds the pressure in the downstream compression chamber, and the sealing device () is configured to prevent fluid flow from a downstream compression chamber to an upstream compression chamber through the sealing surface when the pressure in the downstream compression chamber exceeds the pressure in the upstream compression chamber. 1. A scroll compression device including at least:a first scroll element having a first base plate and a first spiral wrap extending from the first base plate,a second scroll element having a second base plate and a second spiral wrap extending from the second base plate, at least one of the first and second scroll elements being configured to perform an orbiting movement in relation to the other one of the first and second scroll elements, the first and second scroll elements intermeshing with each other and delimiting compression chambers,a sealing device arranged in an end face of the first spiral wrap of the first scroll element and having a sealing surface configured to cooperate with the second base plate of the second scroll element,wherein the sealing device is configured to allow fluid ...

POLYMERIC COMPOSITE INSERT COMPONENT FOR A SCROLL COMPRESSOR

An insert component for a scroll compressor comprises a polymer and at least one reinforcing or lubricating particle. The insert component comprises an annular body and an axial projection. The annular body defines a first centrally-disposed opening having has a central axis extending therethrough. The annular body has a first side comprising a first contact surface configured to engage a partition plate and a second side a second contact surface configured to engage a floating seal assembly. The first contact surface defines a slope between first and second radial locations. The axial projection extends from the annular body and can be received in a second centrally-disposed opening of the partition plate. The insert component can fluidly seal both a first interface between the first contact surface and the partition plate and a second interface between the second contact surface and a floating seal assembly during operation of the scroll compressor. 1. A polymeric composite insert component for a scroll compressor comprising a polymer and at least one reinforcing or lubricating particle , the polymeric composite insert component comprising:an annular body comprising a first annular inner surface defining a first centrally-disposed opening that has a central axis extending therethrough, the annular body having a first side and a second side opposite the first side, the first side comprising a first contact surface configured to engage a partition plate and the second side comprising a second contact surface configured to engage a floating seal assembly, the first contact surface defining a slope between a first radial location and a second radial location; andan axial projection extending from the annular body, the axial projection being configured to be received in a second centrally-disposed opening of the partition plate, wherein the polymeric composite insert component is configured to fluidly seal both a first interface defined between the first contact ...

MOTOR VEHICLE VACUUM PUMP ARRANGEMENT

An electrical motor vehicle vacuum pump arrangement includes a housing assembly which includes an inlet opening arrangement having an inlet opening, an outlet opening arrangement having an outlet opening and an outlet channel, a pump unit having a pump rotor housing with an inlet-side end wall, an outlet side end wall, and a pump rotor housing part arranged therebetween, a drive motor having a motor rotor and a motor stator, sound absorption elements, and a sealing connected to the pump rotor chamber and directed towards the outlet opening. The outlet opening arrangement is connected to one of the sound absorption elements. The outlet channel of the outlet opening arrangement is closed relative to the drive motor and the pump unit. The outlet channel of the outlet opening arrangement, when viewed in a direction of the outlet opening, comprises at least one abrupt change in cross-section. 112-. (canceled)13. An electrical motor vehicle vacuum pump arrangement comprising a housing assembly which comprises:an inlet opening arrangement comprising an inlet opening;an outlet opening arrangement comprising an outlet opening and an outlet channel;a pump unit comprising a pump rotor housing which comprises an inlet-side end wall, an outlet-side end wall, and a pump rotor housing part which is arranged between the inlet-side end wall and the outlet-side end wall, the pump rotor housing part being configured to enclose a pump rotor chamber in which a pump rotor is arranged;a drive motor comprising a motor rotor and a motor stator;at least one sound absorption element which is configured to provide for a noise reduction; anda sealing which is connected to the pump rotor chamber and which is directed towards the outlet opening,wherein,the outlet opening arrangement is connected to one of the at least one sound absorption element,the outlet channel of the outlet opening arrangement is closed relative to the drive motor and the pump unit, and{'sub': 2', '1', '2', '1, 'the outlet ...

SCROLL COMPRESSOR

A scroll compressor () comprises an orbiting scroll component (); a fixed scroll component (); sealing components (PS, PS, PS, PS, PS, PS), wherein the sealing components match a concave part () on the orbiting scroll component () so as to form a back pressure chamber (BC) together, and the sealing components are constructed to separate the back pressure chamber from a high-pressure side and a low-pressure side in the scroll compressor (); and a leakage path (L), wherein the leakage path (L) is constructed to allow fluid in the back pressure chamber (BC) to leak. 1. A scroll compressor comprising:an orbiting scroll component, wherein the orbiting scroll component comprises an orbiting scroll end plate, and a spiral orbiting scroll vane formed at one side of the orbiting scroll end plate;a non-orbiting scroll component, wherein the non-orbiting scroll component comprises a non-orbiting scroll end plate, a spiral non-orbiting scroll vane formed at one side of the non-orbiting scroll end plate, and a concave portion formed at the other side of the non-orbiting scroll end plate, and wherein the concave portion is in fluid communication with one of a series of compression chambers formed between the orbiting scroll vane and the non-orbiting scroll vane via a medium pressure channel;a seal assembly, wherein the seal assembly is fitted with the concave portion to jointly form a back pressure chamber, and wherein the seal assembly is configured to separate the back pressure chamber from a high-pressure side and a low-pressure side in the scroll compressor; anda leakage channel configured to allow fluid in the back pressure chamber to leak.2. The scroll compressor according to claim 1 , wherein the leakage channel is configured to allow the fluid in the back pressure chamber to leak to the high-pressure side.3. The scroll compressor according to claim 2 , wherein the leakage channel is formed in the seal assembly.4. The scroll compressor according to claim 3 , wherein the ...

COMPRESSOR BEARING AND UNLOADER ASSEMBLY

A compressor is provided that may include a drive shaft, a compression mechanism, a bearing and an unloader. The drive shaft may include a main body and a crank pin extending from the main body. The compression mechanism may include first and second members. The crank pin may drivingly engage the second member and cause motion of the second member relative to the first member. The bearing may rotatably supporting the main body of the drive shaft. The unloader may rotatably engage the bearing and slidably engage the main body. 1. A compressor comprising:a drive shaft including a main body and an eccentric portion, said main body including a recess;a compression mechanism including a first member and a second member, said eccentric portion drivingly engaging said first member and causing motion of said first member relative to said second member;a bearing axially spaced apart from said first and second members, said bearing rotatably supporting and engaging said main body of said drive shaft; andan unloader rotatably engaging said bearing and slidably received in said recess of said main body.2. The compressor of claim 1 , wherein said recess is defined by a flat surface of said drive shaft that is substantially parallel to a rotational axis of said main body claim 1 , and said unloader includes a flat surface that slidably engages said flat surface of said driveshaft.3. The compressor of claim 1 , wherein said recess is defined by first and second flat surfaces of said drive shaft that are substantially parallel to a rotational axis of said main body.4. The compressor of claim 3 , wherein said unloader includes first and second flat surfaces claim 3 , said first flat surface of said unloader engages said first flat surface of said drive shaft claim 3 , said second flat surface of said unloader faces said second flat surface of said drive shaft.5. The compressor of claim 4 , wherein said first and second flat surfaces of said unloader are substantially perpendicular ...

Compressor Having A Sleeve Guide Assembly

A compressor may include a shell, a bearing housing, an orbiting scroll, and a non-orbiting scroll. The bearing housing is supported within the shell and includes a central body and a plurality of arms. Each arm extends radially outwardly from the central body and has a first aperture. The orbiting scroll is supported on the bearing housing. The non-orbiting scroll is meshingly engaged with the orbiting scroll and includes a plurality of second apertures. Each second aperture receives a plurality of bushings and a fastener. The fastener extends through the bushings and into a corresponding one of the first apertures in the bearing housing to rotatably secure the non-orbiting scroll relative to the bearing housing while allowing relative axial movement between the non-orbiting scroll and the bearing housing. 1. A compressor comprising:a shell;a bearing housing supported within the shell, the bearing housing including a central body and a plurality of arms extending radially outward from the central body, each of the arms having a first aperture;an orbiting scroll supported on the bearing housing; anda non-orbiting scroll meshingly engaged with the orbiting scroll and including a plurality of second apertures, each second aperture receiving a plurality of bushings and a fastener, the fastener extending through the bushings and into a corresponding one of the first apertures in the bearing housing to rotatably secure the non-orbiting scroll relative to the bearing housing while allowing relative axial movement between the non-orbiting scroll and the bearing housing.2. The compressor of claim 1 , wherein one of the plurality of bushings inside each second aperture extends axially out of the second aperture and abuts a corresponding arm of the bearing housing.3. The compressor of claim 2 , wherein another one of the plurality of bushings inside each second aperture extends axially out of the second aperture and axially separates a head of the fastener from a flange of ...

SEPARATOR PLATE WITH INLET CURVE

A scroll compressor includes a housing comprising a cylindrical shell arranged about a vertically-extending axis, and scroll compressor bodies, including a fixed scroll compressor body and a movable scroll compressor body. The scroll compressor bodies are disposed in the housing and have respective bases and respective scroll ribs that project from the respective bases and which mutually engage for compressing fluid. An electrical motor has a stator and rotor. There is a drive shaft and rotor that acts upon the drive shaft that acts upon the scroll compressor bodies to facilitate relative movement between the scroll compressor bodies. A separator plate is disposed in the housing to separate a high-pressure region from a lower pressure region. The separator plate has a central opening. A perimeter of the central opening is defined by a curved inner wall. The curved inner wall is joined to an outer wall via an annular plate. 1. A scroll compressor comprising:a housing comprising a cylindrical shell section arranged about an axis that is vertically extending;scroll compressor bodies, including a fixed scroll compressor body and a movable scroll compressor body, the scroll compressor bodies being disposed in the housing and having respective bases and respective scroll ribs that project from the respective bases and which mutually engage for compressing fluid;a drive unit having a rotor and a stator;a drive shaft for rotation, the rotor acting upon the drive shaft, which, in turn, acts upon the scroll compressor bodies to facilitate relative orbiting movement between the scroll compressor bodies; anda separator plate disposed in the housing and arranged to separate a high-pressure region from a relatively lower pressure region, the separator plate having a central opening, a perimeter of the central opening defined by a curved inner wall, the curved inner wall joined to an outer wall via an annular plate.2. The scroll compressor of claim 1 , wherein the curved inner ...

Compressor

In order to optimise a compressor, including a compressor housing, a scroll compressor unit that is arranged in the compressor housing and has a first compressor body and a second compressor body that is movable in relation to the first compressor body, an axial guide that supports the movable compressor body to prevent movements in the direction parallel to the centre axis of the stationary compressor body and, in the event of movements, guides it in the direction transverse to the centre axis, parallel to a plane perpendicular to the centre axis, an eccentric drive for the scroll compressor unit, wherein the eccentric drive has an entrainer that is driven by the drive motor, that revolves on a path about the centre axis and that, for its part, cooperates rotatably with an entrainer receptacle in the second compressor body, and a coupling that prevents the second compressor body from rotating freely, it is proposed that the axial guide should have a carrier element, which serves as a base for supporting a compressor body base, which carries the scroll vane, of the second compressor body against an axial support face, that the axial support face should be arranged radially outward of the entrainer, and that the coupling that prevents free rotation should have at least two coupling element sets that, for their part, include at least two coupling elements, and that the coupling element sets should be arranged radially outward of the axial support face. 1. A compressor , includinga compressor housing,a scroll compressor unit that is arranged in the compressor housing and has a first, stationary compressor body and a second compressor body that is movable in relation to the stationary compressor body, whereof first and second scroll vanes, in the shape of a circle involute, engage in one another to form compressor chambers when the second compressor body is moved in relation to the first compressor body on an orbital path running around a centre axis of the stationary ...

Compressor having integrated flow path structure

A compressor is provided having an integrated flow path structure in which an oil flow path and an intermediate pressure flow path are integrated into one in a compression unit, thereby simplifying a flow path of the compression unit. The compressor may include at least one integrated flow path in which the oil flow path and the refrigerant gas flow are integrated into one in a fixed scroll. The at least one integrated flow path may connect an intermediate pressure chamber and a compression chamber in a compressors unit. The at least one integrated flow path may provide a compressed refrigerant in the compression chamber to the intermediate pressure chamber and provide oil in the intermediate pressure chamber to the compression chamber, simplifying the flow path of the compression unit.

Screw Compressor

A screw compressor includes: a screw rotor including a rotor section and a shaft section; a casing having a shaft hole through which the shaft section is inserted, the casing housing the screw rotor; and a delivery side shaft sealing unit configured to seal a clearance between the shaft section and the shaft hole against leakage of a working fluid. The delivery side shaft sealing unit includes an annular groove provided in the shaft section, a seal ring disposed movably in an axial direction of the shaft section within the annular groove, the seal ring being capable of sliding contact with the shaft hole and a side wall surface of the annular groove, and a shaft sealing fluid supply passage communicating with the shaft hole and supplying a fluid to one side, in an axial direction, of the seal ring. The pressure of the fluid that is supplied to the one side, in the axial direction, of the seal ring via the shaft sealing fluid supply passage is set higher than pressure that acts on another side, in the axial direction, of the seal ring. Thus, high shaft sealing performance can be exerted even when the working fluid on the delivery side of the screw rotor has a pressure distribution in a circumferential direction. 1. A screw compressor comprising:a screw rotor having a screw-shaped rotor section and shaft sections each arranged at respective end portions on both sides, in an axial direction, of the rotor section;a casing having shaft holes through which the shaft sections are inserted, the casing housing the screw rotor; anda delivery side shaft sealing unit configured to seal a clearance between a shaft section on a delivery side and a shaft hole on the delivery side against leakage of a working fluid, an annular groove provided in an outer circumferential portion in the shaft section on the delivery side, the outer circumferential portion being opposed to the shaft hole on the delivery side,', 'a seal ring disposed movably in an axial direction of the shaft section ...

Pump sealing

A pump includes a first housing part defining a first portion of a bore extending within the first housing part and shaped to receive a rotor; and a second housing part defining a second portion of the bore extending within the second housing part and shaped to receive the rotor. The first housing part has a first face abutable against an opposing second face of the second housing part to position the first portion of the bore with the second portion of the bore to receive the rotor. The first portion of the bore has a first circular cross-section portion centered along the first face and the second portion of the bore having a second circular cross-section portion centered, within the second housing part, at a distance from the second face.

MOTOR-OPERATED COMPRESSOR

The present disclosure provides a motor-operated compressor comprising a compression module configured to compress a fluid by an orbiting motion of a scroll, an inverter module configured to control an operation of the compression module, a driving motor disposed in the compression module and configured to provide a rotational force for the orbiting motion of the scroll, a power element disposed in the inverter module and configured to provide power to the driving motor, and a three-phase airtight terminal comprising columnar conductors and columnar insulators disposed in an alternating manner along concentric circles. The three-phase airtight terminal may be configured to electrically connect the power element and the driving motor. 1. A motor-operated compressor comprising:a compression module configured to compress a fluid by an orbiting motion of a scroll;an inverter module configured to control an operation of the compression module;a driving motor disposed in the compression module and configured to provide a rotational force for the orbiting motion of the scroll;a power element disposed in the inverter module and configured to provide power to the driving motor; anda three-phase airtight terminal comprising columnar conductors and columnar insulators disposed in an alternating manner along concentric circles, the terminal being configured to electrically connect the power element and the driving motor.2. The compressor of claim 1 , wherein the three-phase airtight terminal comprises:a first conductor having a cylindrical shape disposed at a center of the concentric circles;a first insulator having a hollow cylindrical shape configured to surround the first conductor;a second conductor having a hollow cylindrical shape configured to surround the first insulator;a second insulator having a hollow cylindrical shape configured to surround the second conductor;a third conductor having a hollow cylindrical shape configured to surround the second insulator; anda ...