РОТОРНАЯ ВИНТОВАЯ МАШИНА ОБЪЕМНОГО ТИПА И СПОСОБ ПРЕОБРАЗОВАНИЯ ДВИЖЕНИЯ В ОБЪЕМНОЙ ВИНТОВОЙ МАШИНЕ

Изобретение относится к роторной винтовой машине объемного типа. Машина содержит корпус (30), имеющий основную ось X, и два элемента (10, 20), при этом первый элемент (20) окружает второй элемент (10). Первый элемент (20) шарнирно установлен в корпусе (30) и сам может поворачиваться вокруг своей оси (Xf), совпадающей с основной осью X, согласно поворотному движению, в то время как ось (Хm) второго элемента (10) обращается вокруг оси первого элемента (Xf) согласно движению обращения с длиной Е в качестве радиуса. Машина дополнительно содержит синхронизатор (34; 36; 38; 40), синхронизирующий поворотное движение и движение обращения так, что рабочая среда совершает объемное перемещение, по меньшей мере, в одной рабочей камере (11), ограниченной наружной поверхностью (22) первого элемента (20) и внутренней поверхностью (12) второго элемента (10). Задача изобретения - расширение технического и функциональных потенциалов, уменьшение угловой протяженности термодинамических циклов, повышение КПД ...

ТОПЛИВНЫЙ НАСОС ВЫСОКОГО ДАВЛЕНИЯ

Изобретение относится к двигателестроению, в частности к топливным насосам высокого давления для двигателей внутреннего сгорания. Изобретение позволяет снизить трение и шум при работе насоса. Топливный насос содержит насосно-распределительное звено. Привод осуществляется через муфту Ольдгема от приводного вала. Передача момента в муфте Ольдгема осуществляется на выполненных по принципу опоры качения плоскостях передачи. 5 з.п. ф-лы, 1 ил.

Коловратный двигатель или насос

Axialkugellager

SPIRALVERDICHTER

SPIRALVERDICHTER, INSBESONDERE ZUM EINSATZ BEI DER DRUCKLUFTERZEUGUNG FÜR SCHIENENFAHRZEUGE

Co-rotational scroll apparatus with optimized coupling between scroll wraps.

In a co-rotational scroll apparatus having two interleaving scroll wraps secured to end plates rotating about parallel, non-concentric axes to produce a relative orbital motion, a coupling for causing concurrent rotation and for enhancing the nutational stability of the scroll element. In the preferred embodiment, the nutation reducing means is comprised of an Oldham-type coupling engaging extension members on one of the scroll end plates and drive keys on the other respective end plate. The angular disposition thereof is optimized to cause the Oldham coupling to generate during rotation a moderating moment load in opposition to the tipping moment load of at least one of the scroll elements and thereby enhance the nutational stability of the scroll elements. The moderating moment load of the coupling imposed on the scroll elements may be altered by varying the angular and radial disposition of the center of gravity of the coupling.

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 ...

SCROLL-TYPE POSITIVE-DISPLACEMENT ROTARY FLUID-MACHINE

Positive displacement rotary pump

A displacement machine for a fluid comprising a housing including a spiral wall containing a displacement body including a spiral wall engaged with the spiral wall of the housing to form chambers therewith. The spiral wall of the displacement body extends over an angle greater than 360 DEG to provide overlapping first and second ends and the spiral wall extends axially on both sides of a transverse disc. The center of the displacement body is rotated around a closed circular path, and a crank arm is pivotably connected to the housing at a first pivot axis and to the displacement body at a second pivot axis in the region of the spiral wall of the displacement body. The transverse disc has a radial terminal edge extending between the overlapping first and second ends of the spiral wall of the displacement body. The disc travels in a slot in the spiral wall of the housing and the terminal edge is shaped in correspondence with the path of movement of the disc relative to the housing so that ...

SCROLL TYPE FLUID DISPLACEMENT APPARATUS

Scroll compressor

POSITIVE-DISPLACEMENT ENGINE ACCORDING TO THE SPIRAL PRINCIPLE

ROTARY-PISTON ENGINE TROCHOIDENBAUART, IN PARTICULAR INTERNAL-COMBUSTION ENGINE

ROTARY-PISTON ENGINE TROCHOIDENBAUART, IN PARTICULAR INTERNAL-COMBUSTION ENGINE

ROTATION-PREVENTING DEVICE FOR A SCROLL COMPRESSOR

HERMETIC SCROLL TYPE COMPRESSOR

AXIAL BEARINGS FOR SCROLL PUMPS

MINIMISING VIBRATION IN SCROLL COMPRESORS

Rotating piston machine

SCROLL PUMP BEARINGS

Oldham coupling for scroll machine

SCROLL-TYPE MACHINE

Scroll hydraulic machine

ROTARY MACHINE FOR MINIMAL CHAMBER VOLUME

SCROLL-TYPE FLUID DISPLACEMENT APPARATUS

PRE-TESTABLE AND REPAIRABLE HERMETIC SCROLL TYPE COMPRESSOR

PRE-TESTABLE AND REPAIRABLE HERMETIC SCROLL TYPE COMPRESSOR A hermetic type scroll compressor includes a hermetically sealed compressor housing formed by first and second cup shaped casings. The first casing houses a compression mechanism, while the second casing houses a drive mechanism. The compression mechanism includes a fixed scroll affixed to the first cup shaped casing, an orbiting scroll interfitted atan angular and radial offset with the fixed scroll, and a rotation preventing device disposed between the orbiting scroll and the center block. The movement of both the compression and driving mechanisms may be inspected or tested and those mechanisms may be readily disassembled so that component parts thereof may be adjusted or replaced before hermetically securing the first casing to the second casing. Furthermore, each casing is provided with a center block forming, in part, an alignment mechanism for aligning the drive mechanism drive shaft with the orbiting scroll of the compression ...

SCROLL TYPE FLUID MACHINERY

A scroll type fluid machinery capable of preventing effectively fluid leakage caused by a meshing error between a solid scroll and a turning scroll and improving the lives of parts constituting a rotation-on-axis prevention mechanism and a design freedom, the rotation-on-axis prevention mechanism comprising a plurality of turning pins (31) provided at the end plate of a turning scroll (15) so as to project therefrom, as many housing pins (32) as the number of the turning pins (31), provided at a front end plate (11b) disposed facing the above end plate, so as to project therefrom, and a projection restricting member (33) having a plurality of holes (34) to which these pins (31), (32) are individually inserted, the holes (34) being formed to have diameters sufficiently larger than those of the turning pines (31) and the housing pins (32). The rotation-on-axis prevention mechanism restricts a maximum radial displacement with the pins (31), (32) kept in sliding contact with the inner peripheral ...

FLUID MACHINE

A fluid machine (14, 102, 108) is provided with: fluid units (16, 20) which have rotating bodies (40, 66) and into which and from which an operating fluid flows as the rotating bodies (40, 66) rotate; and a drive shaft (72) to which the rotating bodies (40, 66) of the fluid units (16, 20) are connected. An Oldham's coupling (85) is provided to a shaft section of the drive shaft (72), the shaft section being located between the rotating bodies (40, 66).

CO-ROTATIONAL SCROLL APPARATUS WITH OPTIMIZED COUPLING

METHOD OF DYNAMICALLY BALANCING NESTED COUPLING MECHANISMS FOR SCROLL MACHINES

SCROLL HYDRAULIC MACHINE

A scroll hydraulic machine comprising a housing having a key groove, a fixed scroll disposed in said housing, a swirling scroll having a key groove disposed in said housing, engaging with said fixed scroll, and moving in a swirling motion, and an Oldham ring provided with a swirling key engaging, in a freely sliding manner, with said key groove formed on said swirling scroll, and a fixed key engaging, in a freely sliding manner, with the key groove formed on said housing, and Sn plated on at least one side surface of the swirling key and the fixed key.

POSITIVE DISPLACEMENT PUMP

A compressor assembly including a compression mechanism, a rotating cranksha ft operably coupled to the compression mechanism, the crankshaft provided with a longitudinally-extending oil conveyance passageway, the oil conveyance passageway in fluid communication with relatively moving interfacing bearing surfaces of the compression mechanism, and an oil pump assembly. The oil pump assembly includes an oil pump body having an interior surface and being rotatable relative to the crankshaft, a vane disposed within the pump body and rotating with the crankshaft, the vane having at least one end in sliding engagement with the interior surface of the oil pump body, and a por t plate disposed within the pump body and having rotatably opposite first and second position s. The vane is in sliding engagement with an adjacent surface of the port plate, and the po rt plate is provided with an inlet and an outlet. The pump body receives oil from a source of oil , the oil received in the pump body directed ...

STEPPED ANNULAR INTERMEDIATE PRESSURE CHAMBER FOR AXIAL COMPLIANCE IN A SCROLL COMPRESSOR

A scroll compressor having a suction pressure chamber into which fluid is received substantially at suction pressure and a discharge pressure chamber from which the fluid is discharged substantially at discharge pressure, including a first scroll member having a first involute wrap element projecting from a first substantially planar surface, a second scroll member having a second involute wrap element projecting from a second substantially planar surface, and third and fourth surfaces opposite the second substantially planar surface, the third and fourth surfaces respectively located in first and second planes which are spaced apart from each other and substantially parallel with the second substantially planar surface. The first and second scroll members are mutually engaged with the first involute wrap element projecting towards the second surface and the second involute wrap element projecting towards the first surface, the first surface positioned substantially parallel with the second ...

OLDHAM COUPLING FOR A SCROLL COMPRESSOR

A scroll compressor including a fixed scroll member having a substantially planar surface and an involute wrap element projecting therefrom, and provided with a first pair of offset, parallel elongate recesses, and an orbiting scroll member having a substantially planar surface and an involute wrap element projecting therefrom, and provided with a second pair of offset, parallel elongate recesses, the first and second pairs of recesse s aligned in substantially perpendicular directions, the fixed and orbiting scroll member s mutually engaged. An Oldham coupling is disposed in a first plane located between and substantially parallel with the substantially planar surfaces, the Oldham coupling having a first pair of axially extending tabs slidably engaged in the first pair of recesses and a second pair of axially extending tabs slidably engaged in the second pair of recesses, whereby relative rotation between the fixed and orbiting scroll members is prevented. The Oldham coupling has an outer ...

Umlaufverdichter für höhere Drücke mit zylindrischem Gehäuse und zylindrischem, exzentrisch gelagertem Kolben.

Drehkolbenmaschine.

Accouplement élastique de deux arbres rotatifs

ANORDNUNG MIT MINDESTENS ZWEI TEILEN, DIE IN BEZUG AUFEINANDER IN EINER GEFUEHRTEN, KREISENDEN BEWEGUNG BEWEGBAR SIND.

VOLUMETRIC FLUID MACHINE SCROLL-TYPE.

POSITIVE-DISPLACEMENT ENGINE ACCORDING TO THE SPIRAL PRINCIPLE.

CLUTCH ARRANGEMENT AT A TWO-STAGE ROTARY VANE PUMP.

Displacement machine with spiral displacement member

The positive-displacement machine for compressible media has a spiral chamber (11) in a housing (7), accommodating a mating spiral displacement member (1) mounted on an eccentrically driven rotor disc (3) to bear at all times against inner and outer peripheral walls of the chamber. To guide the disc w.r.t. to the housing, a second eccentric mechanism (26, 27) is provided at a distance from a first one (23, 24). Its guide shaft (27) in bearings in the housing is driven by gear train from that (24) of the first mechanism. The guide shaft works in plain bearings (28) in the housing, with the lubricant outlet from the bearings connected by a passage (30) to the lubricant supply for the drive shaft (24).

Scroll compressor

Scroll compressor

MACHINE DU TYPE A VOLUTES, SON DISPOSITIF D'ENTRAINEMENT, ET COMPRESSEUR DE FLUIDE DU TYPE A VOLUTES

ON DECRIT UNE MACHINE DU TYPE A VOLUTES SE PRETANT PARTICULIEREMENT A UNE UTILISATION EN TANT QUE COMPRESSEUR DE REFRIGERANT 30 ET COMPORTANT UN SYSTEME DE SUSPENSION POUR LA SPIRE NON-TOURNANTE 36, PERMETTANT A CETTE DERNIERE D'ETRE SOUMISE A UNE FORCE DE PRESSION DANS LE BUT D'AUGMENTER L'ETANCHEITE DES EXTREMITES. LA MACHINE PRESENTE EGALEMENT UN PROFIL MODIFIE DES EXTREMITES DES SPIRES ET DES PLAQUES D'EXTREMITE, AFIN D'EN ACCROITRE LES PERFORMANCES, AINSI QU'UN SYSTEME DE LUBRIFICATION AMELIORE POUR LE DISPOSITIF D'ENTRAINEMENT, ET UN DISPOSITIF A CHICANE FOURNISSANT UN ORIFICE D'ADMISSION PAR ASPIRATION DIRIGEE. LA MACHINE COMPORTE EGALEMENT UN COUPLAGE DE OLDHAM 38 UTILISANT UN NOUVEL ELEMENT ANNULAIRE QUI EST NON CIRCULAIRE ET PERMET D'AUGMENTER LA TAILLE DU PALIER DE BUTEE, OU DE DIMINUER LES DIMENSIONS DE LA MACHINE. ON DECRIT EGALEMENT UN PROCEDE DE FABRICATION D'UNE MACHINE DU TYPE A VOLUTES.

Improvements to elastic couplings

ELEMENT D'ACCOUPLEMENT, NOTAMMENT POUR MACHINE A MOUVEMENT ORBITAL

L'invention concerne un élément d'accouplement, notamment pour machine à mouvement orbital. Ledit élément, qui permet d'accoupler deux composants en relation angulaire predéterminée, dont l'un décrit une orbite par rapport à l'autre, comporte une couronne présentant des paires de clavettes diamétralement opposées sur ses faces annulaires opposées, une paire de clavettes étant décalée de 90 degrés par rapport à l'autre. Les clavettes sont maintenues sur des goujons de pivotement fixés à la couronne, ces goujons présentant des brides qui sont logées dans des contre-alésages de la couronne. Plusieurs disques stabilisateurs sont également incrustés dans les surfaces de la couronne annulaire. Application à des machines telles que des compresseurs à volutes de réfrigérateur.

MACHINE OF THE TYPE HAS SPIRAL

MACHINE OF REPRESSION OF FLUIDS, OF THE TYPE HAS SPIRAL

Turbo machine has elliptic rotor.

DEVICE TO PREVENT the ROTATION OF the ORBITAL ELEMENT Of an APPARATUS DEDEPLACEMENT OF FLUID

VOLUMETRIC MACHINE HAS FLUID

MECHANISM HAS THRUST BEARING AND Of COUPLING FOR MACHINE OF the TYPE HAS VOLUTES AND HAS ORBITAL MOVEMENT AND MACHINE EQUIPEE OF THE AFORESAID MECHANISM

ROTATON PREVENTING DEVICE FOR AN ORBITING MEMBER OF FLUID DISPLACEMENT APPARATUS

A scroll type fluid displacenent apparatus including a housing, fixed scroll fixedly disposed within the housing and having a circular end plate from which a first wrap extends, an orbiting scroll having a circular end plate from which a second wrap extends, the first and second wraps interfitting at an angular and radial offset to form a plurality of line contacts to define at least one pair of sealed off fluid pockets, a driving means operatively connected to the orbiting scroll to effect orbital motion of the orbiting scroll, and a rotation preventing/thrust bearing means for preventing rotation of the orbiting scroll during orbital motion. Copyright 1997 KIPO ...

COMPRESSOR

Stationary and orbiting scrolls (1,2) are housed in a shell, which also carries a frame (6) for part of the orbiting scroll. The stationary scroll is fixed to the frame and a second frame (7) also mounted in the shell. A balancer chamber (705) is provided between the frames, in which a shaft (4)-mounted balancer (402) turns. The shaft has a large dia. Section (409) away from it, extending between the frames for driving the orbiting scroll. A bearing (602) is provided between the main shaft at the orbiting scroll side of the balancer. A second bearing (702) between the main shaft and second frame supports the shaft opposite the orbiting scroll side of the balancer. Copyright 1997 KIPO ...

ROTARY SCREW MACHINE AND METHOD OF TRANSFORMING A MOTION IN SUCH A MACHINE

The invention relates to a rotary screw machine of volume type comprising a body (30) having a main axis X, two members (10, 20), wherein a first one (20) surrounds a second one (10). Said first member (20) is hinged in said body (30) and is able to swivel on itself about its axis (Xf), aligned with said main axis X, according to swiveling motion, whereas the axis (Xm) of said second member (10), revolves about the axis of said first member (Xf) according to an revolution motion having said length E as a radius. The machine further comprises a synchronizer (34, 36, 38, 40) synchronizing said swiveling motion and said revolution motion, such that a working medium performs a volumetric displacement in at least one working chamber (11) delimited by an outer surface (22) of said first member (20) and a inner surface (12) of said second member (10). © KIPO & WIPO 2007 ...

[...] apparatus for a motor cycle [...] near-isothermal

ROLL COMPRESSOR AND METHOD TO BALANCE IT "

SCROLL-TYPE MACHINE

Scroll hydraulic machine

A scroll hydraulic machine comprising a housing having a key groove, a fixed scroll disposed in said housing, a swirling scroll having a key groove disposed in said housing, engaging with said fixed scroll, and moving in a swirling motion, and an Oldham ring provided with a swirling key engaging, in a freely sliding manner, with said key groove formed on said swirling scroll, and a fixed key engaging, in a freely sliding manner, with the key groove formed on said housing, and Sn plated on at least one side surface of the swirling key and the fixed key.

NON SYMMETRICAL KEY COUPLING CONTACT AND SCROLL COMPRESSOR HAVING SAME

A scroll compressor includes a movable scroll compressor body and a fixed scroll compressor body that are arranged for relative orbital movement relative to one another to facilitate compression of refrigerant. To guide the orbital movement, a Oldham key coupling is provided that may include four keys spaced in separate quadrants for guiding movement of the scroll compressor body along a linear translational path along a lateral axis. Additionally, running clearances may be unequally and non-symmetrically arranged so as to prevent unwanted rotation of one of the scroll compressor bodies and thereby prevent unwanted edge loading.

LOCATING DEVICE OF ROTARY PISTON MECHANISM

The invention relates to a locating device of a rotary piston mechanism, by means of which, rotational motions of a moving piston (2) and a power transmission part (4) on a centre axis (Kl) of the piston or on its extension are supported by a locating joint in a rotation support point of the piston or in its immediate vicinity, closable and openable according to piston positions and controlled centrically to a cardan shaft (1) by a crank arm (Tl) formed between the cardan shaft and the centre axis of the piston such that a statically stable support structure is provided for the motions of the piston, for the rotational motions around the rotation support point of the power transmission part (4) on the centre axis of the piston or on its extension and for the rotation around the centre axis of the piston, and an eccentric shaft (14) is disconnected.

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.

Scroll fluid machine having surface coating layers on wraps thereof

A wrap of an orbiting scroll member and a wrap of a fixed scroll member are each provided with a non-rigid surface coating layer having a predetermined thickness. An orbiting radius varying mechanism is provided between a driving shaft and the orbiting scroll member, thereby gradually increasing the orbiting radius of the orbiting scroll member at the initial stage of running, and thus positively allowing the surface coating layers to wear by rubbing against each other. A stopper mechanism is provided between the driving shaft and the orbiting scroll member to regulate the rotation angle of a variable crank relative to the driving shaft to a predetermined rotation angle, thereby preventing the surface coating layers from being excessively worn as the orbiting radius of the orbiting scroll member increases.

High displacement rate, scroll-type, fluid handling apparatus

A positive displacement fluid handling apparatus has a first, high volumetric displacement rate scroll pump of nested interacting pairs of fixed and movable spiral-shaped blades supported in a housing between an inlet and an outlet. Each adjacent blade pair is of sufficient angular extent, preferably only about 360°, to close an inter-blade pocket. In a preferred form for a vacuum pump, a second scroll pump mounted in the housing has its fluid inlet in direct fluid communication with the first scroll outlet. The second scroll has a single pair of co-acting fixed and movable blades with multiple revolutions with a relatively short axial height. The low back leakage of this second pump allows the first pump to omit tip seals on the free spiral edges of the blades. The volumetric displacement rate of the first pump exceeds that of the second pump. An orbiting plate carries the movable blades of both scroll pumps. The drive has a small crank radius which reduces seal velocity and wear, and ...

Oldham coupling mechanism of a scroll type fluid displacement apparatus

A fluid displacement apparatus includes a housing having a fluid inlet and fluid outlet, and a pair of grooves disposed on an inner surface thereof. A fixed scroll is fixedly disposed within the housing and has a circular end plate from which a first spiral element extends into the interior of the housing. An orbiting scroll has a circular end plate from which a second spiral element extends and has a pair of grooves formed on the circular end plate. An Oldham coupling disposed between the orbiting scroll and the housing includes a ring, a pair of first engaging portions formed on the ring for engaging with the grooves on the end plate of the orbiting scroll and a pair of second engaging portions formed on the ring for engaging with the grooves disposed on the inner surface of the housing. The ring further comprises at least one ring portion subject to a compressive stress and at least one ring portion subject to a tensile stress. A cross sectional area of the at least one ring portion ...

Scroll-type fluid machine

A scroll-type fluid machine including: a scroll unit (4) having a fixed scroll (2) and a movable scroll (3) in which a bottom plate center (3c) and a wrap spiral center (3d) are made eccentric; and a rotation-inhibiting mechanism (30) with multiple rotating-inhibiting parts (33), each part (33) being composed of a circular hole (31) and a pin (32), wherein the rotation-inhibiting mechanism (30), a straight line A connecting the bottom plate center (3c) and the wrap spiral center (3d) is rotated on the bottom plate center by 90° in a direction opposite to a wrapping direction of the wrap (3b), a point at which the rotated straight line A intersects a pitch circle is set as a center position of one of the rotation-inhibiting parts (33), the other rotation-inhibiting parts (33) are arranged on the pitch circle at even intervals based on one of the rotation-inhibiting part (33).

COMPRESSOR

Disclosed is a scroll type compressor having an Oldham's ring having an asymmetrical structure with respect to a long or minor axis thereof.

Scroll type hydraulic machine

A scroll type hydraulic machine is provided with a scroll unit received in a housing, and a thrust bearing arranged between a movable scroll of the scroll unit and a support surface of the housing and receiving a thrust load of the movable scroll, and the thrust bearing includes a plurality of circular retention holes formed in the support surface, and sliding discs rotatably fitted into these retention holes and sliding with respect to both inner surfaces of the retention holes and the movable scroll.

Scroll type fluid displacement apparatus

A fluid displacement apparatus includes a housing having a fluid inlet and fluid outlet, and a pair of grooves disposed on an inner surface thereof. A fixed scroll is fixedly disposed within the housing and has a circular end plate from which a first spiral element extends into the interior of the housing. An orbiting scroll has a circular end plate from which a second spiral element extends and has a pair of grooves formed on the circular end plate. An Oldham coupling disposed between the orbiting scroll and the housing includes a ring, a pair of first engaging portions formed on the ring for engaging with the grooves on the end plate of the orbiting scroll and a pair of second engaging portions formed on the ring for engaging with the grooves disposed on the inner surface of the housing. The ring further comprises at least one ring portion subject to a compressive stress and at least one ring portion subject to a tensile stress. A cross sectional area of the at least one ring portion ...

Orbiting piston type fluid displacement apparatus with a rotation preventing device

SCROLL COMPRESSOR

PURPOSE: To prevent a flow-out oil from mixing into an intake gas by placing a ring member in between the end plate of a swinging scroll and a bearing support, and fitting steel balls into holes provided in an equal interval on the circumferential direction of said ring member to form a rotation preventing mechanism. CONSTITUTION: Holes 113 are formed on a ring member 112 provided in between the end plate 2a of a swinging scroll and a bearing support, being placed at an equal interval in its circumferential direction, and a steel ball 114 having a slightly smaller diameter than that of the hole is fitted in each of the holes 113. And, the steel ball 114 is fitted in an Oldham's groove 10a of a bearing support 10 on one side while also fitted in the Oldham's groove 2d of the swinging-scroll end plate 2a on the other side. Due to such a rotation preventing mechanism, the ring member 112 can be singly machined securing the flatness of its surface, thereby, preventing oil from flowing out from ...

SCROLL COMPRESSOR

PROBLEM TO BE SOLVED: To provide a structure in which an efficient oil supply to a sliding part between an Oldham's ring key and a frame side key groove side face can be performed in an Oldham's mechanism for preventing a swivel scroll from self-turning with a scroll compressor. SOLUTION: An oil reservoir 19 and an oil route 20 for connecting the oil reservoir 19 and a frame side Oldharm's key groove 8a are provided in a back pressure chamber, and an oil groove 21 and a gate 8e are provided from an Oldham's ring key 10b and the bottom part of an actual sliding face 8c of a frame side key groove side face toward a key groove bottom face 8d and at a one-side cutout part of the key groove bottom face, respectively. In addition, the key groove is constituted by connecting the key groove side face and bottom face by means of a continuous, smooth curve face or a flat face forming a small angle of 90 degrees or less. COPYRIGHT: (C)1997,JPO ...

SCROLL TYPE COMPRESSOR

PURPOSE: To decrease a number of movable members and part items and to prevent a movable scroll from tilting by providing a means for guiding a housing side lace of a revolving on its axis-preventing mechanism to only a rotational axial line direction and a member for press-energizing the lace to a movable scroll side. CONSTITUTION: A revolving on its axis-preventing mechanism 16, which permits orbital motion rotation of a movable scroll 9 and prevents the movable scroll 9 from revolving on its axis, is interposed between the movable scroll 9 and a front housing 2. Here, a guide surface 2b, for guiding a guide ring 17a integrally formed with a housing side lace 17 of the revolving on its axis-preventing mechanism 16 in the axial line direction, is formed in the front housing 2. Further, an annular elastic unit 23, opposed to the guide ring 17a and formed of a leaf spring, is housed in an annular recessed groove 2c opposedly formed to the front housing 2 and the lace 17, revolving on its ...

SCROLL TYPE FLUID MACHINERY

PURPOSE: To suppress the rotation of a movable scroll member with high precision by the simple structure and reduce the power loss, abrasion, etc., due to the sliding friction of an Oldham's coupling. CONSTITUTION: As for a rotation preventing mechanism such as Oldham's coupling which is used fur allowing only revolution by suppressing the rotation of the movable scroll member of the scroll type fluid machinery such as scroll compressor, when the dynamic loss due to friction and the abrasion are reduced by removing a slidable part, a key 12c formed on a retainer ring 12 is engaged with the groove part 11a of a movable race 11 installed on the movable scroll member, and a recess 11b is formed at the engagement part, and a ball 14 which rolls inside is interposed, and the direct side contact between the key 12c and the groove part 11a is prevented, and the friction is reduced, and also the slip-off of the ball 14 is prevented. COPYRIGHT: (C)1994,JPO&Japio ...

PLATE INTERPOSING METHOD IN SCROLL COMPRESSOR

PROBLEM TO BE SOLVED: To reduce the number of assembling process, change only a plate and prevent abnormal sound and abrasion by pressing pins of a specified number which are projected to the rear surface of a front housing or the front surface of a movable side plate in short width parts of slots of a specified number which are passed through the plate and extend in the orthogonally crossing direction with each other. SOLUTION: Two slots 30a, 30b which are located by holding a shaft center by the slots 30a, 30b each other are passed through a ring-shaped plate 30. The slot 30a extends in the shaft center direction and the slot 30b extends in the direction which is orthogonally crossed with the long hole 30a. Two pins 1a, 1b which are solid and have complete round in cross section are pressed in the rear surface of a front housing 1 by being axially projected to a location where the shaft center is held by the pins 1a, 1b each other. By pressing the pins 1a, 1b of the front housing 1 in ...

SCROLL COMPRESSOR

PURPOSE: To prevent the occurrence of seizure and excessive wear between a key part and a relative slide part by mounting the key part by means of intermediate members inserted in respective holes, formed in the upper and under surfaces of a ring body, in a manner to protrude from a side to the outside, in the Oldham's ring of a scroll compressor for an air-conditioner. CONSTITUTION: Holes are formed in four equally divided positions in an annular ring body 21 of an Oldham's ring 20 and intermediate members 24 are inserted therein and protruded from a side. A key part 22 is engaged, as shown in a figure, in the upper surface of a ring body 21 and other key part 23 is engaged in the under surface of the ring body 21, the key parts being alternately engaged therein. The end parts on the key parts 22 and 23 side of the intermediate members 24 are plastically deformed in a disc-shape 26, and the ends on the other side are plastically deformed in a square shape 25 for fixing. In this case, a ...

ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ С КАЧАЮЩИМСЯ РОТОРОМ-ПОРШНЕМ

Изобретение относится к двигателям внутреннего сгорания. Двигатель внутреннего сгорания содержит корпус как минимум с двумя радиальными перегородками и со свечами зажигания, боковые крышки, как минимум двухлопастной ротор-поршень, выходной вал. Ротор-поршень имеет ступицу с выемками. Выемки образуют с перегородками корпуса каналы для перепуска рабочей смеси, а с лопастями ротора-поршня - камеры нагнетателей и рабочие камеры сгорания. Двигатель содержит соосно расположенные в ряд как минимум один дополнительный корпус с промежуточной боковой крышкой и качающимся ротором-поршнем, а также стационарно установленную в центральных опорах боковых и промежуточных крышек опорную ось с качающимися на ней роторами-поршнями. В полости роторов-поршней размещены устройства кривошипно-кулисных механизмов. Кулисные пазы расположены в области ступиц роторов-поршней и сопряжены подвижно с ползунами. Ползуны качаются на кривошипных шейках выходного как минимум двухкривошипного коленчатого вала. Коленчатый ...

МАШИНА ОБЪЕМНОГО РАСШИРЕНИЯ С КАЧАЮЩИМСЯ РАБОЧИМ ОРГАНОМ

Изобретение относится к машиностроению. Машина объемного расширения с качающемся поршнем выполнена в виде неподвижного цилиндрического корпуса, соосно расположенного в нем внутреннего цилиндрического поршня, коленвала, ползуна и маятникового рычага. Корпус разделен на сектора внутренними перегородками. Поршень выполнен с внешними перегородками, образующими камеры сгорания. Коленвал соосно расположен с корпусом и поршнем. Маятниковый рычаг связывает между собой коленвал и внутренний цилиндрический поршень и имеет опору на ползуне с возможностью изменения своей геометрии вдоль оси. Техническим результатом является повышение компактности, экономичности и экологичности двигателя с изменяемой степенью сжатия. 3 ил.

РОТОРНАЯ МАШИНА

Изобретение относится к объемным роторным машинам и может быть использовано в качестве двигателя внутреннего сгорания, компрессора или насоса. Роторная машина содержит полый корпус, эксцентрично установленный в полости корпуса ротор и лопатки. Образующая корпуса выполнена по конхоиде. Лопатки кинематически связаны с установленным в корпусе внутри коленчатым валом. Ротор выполнен в виде диска, во взаимно перпендикулярных направляющих которого расположены лопатки. Лопатки установлены на мотылевых шейках коленчатого вала, оси вращения которых расположены на образующей конхоиды. Ось вращения ротора расположена в точке полюс образующей окружности конхоиды, через которую одновременно проходят оси симметрии лопаток. Каждая пара лопаток снабжена уплотнительными пластинами и ленточными пружинами, установленными на концах лопаток. Техническим результатом является упрощение конструкции, улучшение эксплутационных характеристик и повышение надежности работы. 3 ил.

ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ

ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ

Изобретение относится к машиностроению. Двигатель внутреннего сгорания состоит, по меньшей мере, из одной роторной секции, механизм которой состоит из силовой цевочной муфты и размещен внутри ротора. Ротор имеет радиальный наружный профиль в форме гипоциклоиды. При этом силовой вал секции состоит из двух соосных и взаимно оппозитных валов, внутри ротора соединенных друг с другом тремя цевками силовой цевочной муфты. Цевки параллельно оси вала закреплены на оппозитных дисках валов. Диск вала в профиле имеет форму с закругленными вершинами, по числу вершин повторяющую форму наружного профиля ротора. На каждой цевке своим эксцентрическим отверстием с возможностью вращения и скольжения установлен круговой ролик с противовесом. Своей наружной цилиндрической поверхностью каждый ролик установлен с возможностью вращения и скольжения по внутренней цилиндрической поверхности одного из сквозных круговых отверстий среднего силового диска ротора, являющегося для цевочных дисков вала ответной частью ...

РОТОРНАЯ ВИНТОВАЯ МАШИНА ОБЪЕМНОГО ТИПА И СПОСОБ ПРЕОБРАЗОВАНИЯ ДВИЖЕНИЯ В ОБЪЕМНОЙ ВИНТОВОЙ МАШИНЕ

... 1. Роторная винтовая машина объемного типа, содержащая корпус (30), имеющий основную ось Х, два элемента, состоящие из охватываемого элемента (10; 110; 500; 600; 700) и охватывающего элемента (20; 120; 600; 700; 800), окружающего охватываемый элемент, в которой наружная поверхность охватываемого элемента (10; 110; 500; 600; 700) определяет охватываемую поверхность (12; 112), а внутренняя поверхность охватывающего элемента определяет охватывающую поверхность (22; 122), при этом охватываемая (12;112) и охватывающая (22; 122) поверхности представляют собой спиральные поверхности, имеющие соответствующие оси Хm и Хf, которые параллельны и отстоят друг от друга на длину Е, причем охватываемая (12; 112) и охватывающая (22; 122) поверхности образуют, по меньшей мере, одну рабочую камеру (11) посредством формирования линейных контактов (А1, А2, А3) охватываемой (12; 112) и охватывающей (22; 122) поверхностей и относительного перемещения охватываемого (10; 110; 500; 600; 700) и охватывающего (20 ...

INTERFITTING MECHANISM OF SPIRAL ELEMENTS FOR SCROLL TYPE FLUID DISPLACEMENT APPARATUS

KUPPLUNGSANORDNUNG FUER 2-STUFIGE DREHSCHIEBERPUMPEN

SPIRALVERDICHTER MIT OPTIMIERTER KUPPLUNG

VERDRAENGERMASCHINE FUER INKOMPRESSIBLE MEDIEN.

HERMETISCHER SPIRALVERDICHTER.

Spiral compressor

A spiral compressor with at least one displacer disc moved by an eccentric shaft in a compressor casing opposite a chamber casing is proposed, having at least two journals (29, 31) to absorb the forces acting axially on the displacer disc (5). ...

Fluid Machine

Purpose: To provide a fluid machine, the production efficiency and maintenance characteristics of which can be improved while performance is ensured. Means to attain the purpose: A fluid machine ( 14, 102, 108 ) has a plurality of fluid units ( 16, 20 ) that include rotating bodies ( 40, 66 ) and suck/discharge a working fluid along with the rotation of the rotating bodies, and a drive shaft ( 72 ) connected with the rotating bodies of the fluid units; and an Oldham's coupling ( 85 ) is mounted on a shaft portion between each two adjacent rotating bodies of the drive shaft.

Scroll Fluid Machine

Disclosed is a scroll fluid machine configured from inexpensive materials and provided with a rotation prevention mechanism with excellent durability. In the scroll fluid machine, a fixed scroll, the spiral body of which has been vertically disposed on one end surface of an endplate, and a movable scroll, the spiral body of which has been vertically disposed on one end surface of the endplate, are arranged eccentrically to and out of phase with each other such that the spiral bodies engage with each other and the movable scroll turns relative to the fixed scroll. The scroll fluid machine is characterized by being provided with a rotation prevention mechanism comprising a movable-side pin that protrudes from the other surface of the endplate of the movable scroll, a fixed-side pin that protrudes from the housing side towards the other surface of the endplate of the movable scroll, and a rotation prevention member held from both sides by the movable-side pin and the fixed-side pin.

Scroll compressor

A scroll compressor including a fixed scroll having a fixed wrap; and an orbiting scroll having an orbiting wrap engaged with the fixed wrap to form compression chambers, and performing an orbital motion with respect to the fixed scroll, wherein at least one of the fixed wrap and the orbiting wrap has a first constant section, a variable section, and a second constant section consecutively formed in a direction from a wrap final end to a wrap initial end.

Scroll compressor

The present disclosure relates to a scroll compressor. According to the present disclosure, an oldham ring for preventing the rotation movement of a orbiting scroll may be fabricated by sintering metal powder to have a yield stress above 300 MPa, and thus even when a gas force is eccentrically generated it may be possible to prevent the oldham ring supporting the circular movement of the orbiting scroll from being damaged due to this, thereby enhancing the compressor performance.

Scroll fluid machine

A disc-like spacer arranged below a first roller bearing rotatably supporting a driven crankshaft that forms an anti-rotation system is formed with a plurality of notches in the circumferential direction. A spot face is provided to face the outer circumferential surface of the spacer, and communication holes and are drilled on the outer circumferential side of the spot face to extend in the axial direction of the scroll. Also formed is a communication hole communicating the communication hole with the first roller bearing via the notches. A grease nipple is mounted to the communication hole. To replenish grease, the fixed scroll is removed from the housing such that the orbiting scroll is exposed, and grease is injected from the grease nipple into the first roller bearing with a grease gun.

SCROLL COMPRESSOR

In a scroll compressor of the present invention, a fixed scroll and an orbiting scroll are meshed with each other such that spiral laps of the fixed scroll and the orbiting scroll inwardly face each other, an Oldham ring is provided between the main bearing member and the orbiting scroll and a key portion of the Oldham ring is inserted into a key groove of the main bearing member Grooves are formed in Oldham ring sliding surfaces on both sides of the key groove . According to this configuration, the Oldham ring and the main bearing member can be restrained from coming into contact with each other in the vicinity of the bearing key groove , and restrained from vibrating, and it is possible to provide an inexpensive scroll compressor of low noise. 1. A scroll compressor in which an orbiting scroll is provided between a main bearing member and a fixed scroll ,the fixed scroll and the orbiting scroll are meshed with each other such that spiral laps of the fixed scroll and the orbiting scroll inwardly face each other,an Oldham ring is provided between the main bearing member and the orbiting scroll, anda key portion of the Oldham ring is inserted into a key groove of the main bearing member, whereingrooves are formed in Oldham ring sliding surfaces on both sides of the key groove.2. The scroll compressor according to claim 1 , wherein a portion of each of the grooves in a sliding direction of the Oldham ring has a slope shape.3. The scroll compressor according to claim 1 , wherein relief grooves are formed in both sides of the key portion claim 1 , and the grooves are separated from the key groove.4. The scroll compressor according to claim 1 , wherein the grooves are laterally symmetrically formed in ranges of 60% or less of a diameter of the Oldham ring with respect to the key groove.5. The scroll compressor according to claim 1 , wherein the grooves are laterally symmetrically formed in ranges of 45° or less on left and right sides with respect to the key groove. The ...

SCROLL COMPRESSOR

A scroll compressor includes a high-pressure space capable of communicating with a discharge port and a back pressure space capable of communicating with an intermediate port. A fluid passage includes a seal ring that closes the fluid passage when the pressure of the back pressure space is lower than that of the high-pressure space, and opens the fluid passage when the pressure of the back pressure space is higher than that of the high-pressure space. 1. A scroll compressor , comprising:a casing;a rotary compression mechanism housed in the casing, and including a compression chamber formed by engaging a fixed scroll and an orbiting scroll with each other;a discharge port located in the compression mechanism and being open at a discharge position of the compression chamber;an intermediate port located in the compression mechanism and being open at an intermediate position of the compression chamber;a forming member located in the casing and including a back pressure space and at least part of a fluid passage, the back pressure space facing a back surface of the orbiting scroll and communicating with the intermediate port, the fluid passage allowing a high-pressure space communicating with the discharge port and the back pressure space to communicate with each other; andan opening/closing mechanism configured to close the fluid passage when a pressure of the back pressure space is lower than that of the high-pressure space, and open the fluid passage when the pressure of the back pressure space is higher than that of the high-pressure space.2. The scroll compressor of claim 1 , whereinthe opening/closing mechanism is held by a ring groove that is open to the fluid passage of the forming member,the opening/closing mechanism is configured to freely expand and contract between an inner peripheral wall and an outer peripheral wall of the ring groove,the opening/closing mechanism is constituted by a seal ring including: an outer peripheral sealing surface that seals a gap ...

SCROLL-TYPE FLUID MACHINE

Provided is a scroll-type fluid machine which can reduce deformation of a rotary scroll caused when fixing a bearing into a boss part. A scroll compressor, in which a sealed chamber confining a fluid is formed by a fixed scroll and the rotary scroll meshed together, each of the scrolls having a spiral wall erected on one side face of an end plate, includes: a metallic boss part (C) protruding from the other side face of the end plate of the rotary scroll; a metallic rotary bearing () inserted into the boss part (C); a crankshaft rotating around an axis and including a bush part inserted in the rotary bearing () and rotatably supported by the rotary bearing (); and an insert member () disposed between the boss part (C) and the rotary bearing () and having a thermal expansion coefficient greater than those of the boss part (C) and the rotary bearing (). 1. A scroll-type fluid machine , in which a sealed chamber confining a fluid is formed by a fixed scroll and a rotary scroll meshed together , each of the scrolls having a spiral wall erected on one side face of an end plate , the scroll-type fluid machine comprising:a metallic boss part protruding from the other side face of the end plate of the rotary scroll;a metallic bearing inserted into the boss part;a crankshaft rotating around an axis and including a bush part inserted in the bearing and rotatably supported by the bearing; andan insert member disposed between the boss part and the bearing and having a thermal expansion coefficient greater than those of the boss part and the bearing.2. The scroll-type fluid machine according to claim 1 , whereinthe insert member has a ring shape and is disposed along an inner face of the boss part. The present invention relates to a scroll-type fluid machine in which a sealed chamber confining a fluid is formed by a pair of fixed scroll and rotary scroll meshed together.A scroll compressor, in which a compression chamber is formed by a pair of fixed scroll and rotary scroll ...

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 1:1.25 or greater. 1. A scroll compressor comprising:an orbiting 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; andan 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, wherein 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 wherein the first seal or the second seal has an aspect ratio of axial length to radial width which is 1:1.25 or greater.2. The scroll compressor of claim 1 , wherein the aspect ratio of the first seal or the second seal is 1:1.25 or greater over an entire involute from a pump inlet to a pump outlet.3. The scroll compressor of claim 1 , wherein ...

REFRIGERANT SCROLL COMPRESSOR FOR MOTOR VEHICLE AIR CONDITIONING SYSTEMS

A refrigerant scroll compressor for a motor vehicle air conditioning system having a fixed scroll, an orbiting scroll engaging with the fixed scroll, wherein the fixed scroll and the orbiting scroll cooperate to compress a refrigerant gas. An intermediate pressure chamber is disposed adjacent the orbiting scroll, an oil return duct provides fluid communication between the intermediate pressure chamber and a high pressure area of the refrigerant scroll compressor, and at least one intermediate pressure duct is formed in one of the orbiting scroll and fixed scroll and is in fluid communication with the intermediate pressure chamber. 1. A refrigerant scroll compressor for a motor vehicle air conditioning system comprising:a fixed scroll;an orbiting scroll engaging with the fixed scroll, wherein the fixed scroll and the orbiting scroll cooperate to compress a refrigerant gas;an intermediate pressure chamber disposed adjacent the orbiting scroll;an oil return duct providing fluid communication between the intermediate pressure chamber and a high pressure area of the refrigerant scroll compressor; andat least one intermediate pressure duct formed in one of the orbiting scroll and the fixed scroll and in fluid communication with the intermediate pressure chamber.2. The refrigerant scroll compressor of claim 1 , wherein the fixed scroll and the orbiting scroll cooperate to define a plurality of cavities intermediate the fixed scroll and the orbiting scroll claim 1 , wherein the at least one intermediate pressure duct is in fluid communication with at least one of the plurality of cavities and is configured to facilitate a flow of the refrigerant gas between the at least one of the plurality of cavities and the intermediate pressure chamber.3. refrigerant scroll compressor of claim 1 , further comprising an oil extraction duct in fluid communication with the intermediate pressure chamber.4. The refrigerant scroll compressor of claim 3 , further comprising an expansion device ...

SCROLL COMPRESSOR HAVING ADJUSTABLE SPACERS

A scroll compressor comprises: housing orbiting scroll and fixed scroll The drive shaft has 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. Axial spacers are located between the fixed scroll and the housing for spacing the fixed scroll relative to the orbiting scroll. When the scroll compressor is assembled and tested and it is desired to perform shimming, the fixed scroll can be removed and a selected spacer placed in position prior to re-assembling the fixed scroll. 1. A method comprising:removing a fixed scroll from a housing of a scroll compressor comprising a fixed scroll and an orbiting scroll;replacing a first axial spacer from a plurality of axial spacers between the housing and the fixed scroll with a replacement axial spacer, wherein the replacement axial spacer defines a different axial thickness than the first axial spacer, and wherein the plurality of axial spacers and the replacement axial spacer define a spacing in at least one of an axial direction or an angular alignment between a fixed scroll and an orbiting scroll of a scroll compressor; andfixing the fixed scroll to the housing.2. The method of claim 1 , wherein respective axial spacers of the plurality of axial spacers are located at generally equal angles with respect to a central axis of the compressor.3. The method of claim 1 , wherein at least one of the housing or the fixed scroll comprises means for locating the plurality of axial spacers in position between the fixed scroll and the housing claim 1 , and wherein replacing the first axial spacer from the plurality of axial spacers between the housing and the fixed scroll with the replacement axial spacer comprises removing the first axial spacer from a respective one of the means for location the plurality of axial spacers and locating the replacement axial spacer4. The method of claim 1 , wherein each of the plurality of axial spacers ...

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;a first scroll member disposed within said shell assembly and including a first end plate having a discharge passage, a first spiral wrap extending from said first end plate and a biasing passage extending through 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 with each other and forming a series of pockets therebetween;a seal assembly engaging said first scroll member and isolating said discharge pressure region from said suction pressure region, said seal assembly and said first scroll member defining an axial biasing chamber therebetween, said biasing passage being in communication with a first of said pockets and said axial biasing chamber;a modulation control chamber fluidly coupled with said axial biasing chamber by a first passage; anda modulation ...

SCROLL COMPRESSOR

A scroll compressor includes a compression mechanism having fixed and orbiting scrolls engaged with each other to form a compression chamber. Each of the fixed and orbiting scrolls includes an end plate and a spiral wall-shaped wrap extending from the end plate. The fixed scroll has an injection port configured to communicate with the compression chamber through a communication passageway located in the fixed-side end plate. The orbiting-side wrap has a thick portion located at a position corresponding to the injection port and having an increasing tooth thickness portion. A tooth thickness of the increasing tooth thickness portion increases from a start of winding to an end of winding of the orbiting-side wrap. The thick portion has a thickness greater than or equal to a dimension of an opening of the injection port measured along a tooth thickness of the orbiting-side wrap. 1. A scroll compressor comprising: a fixed scroll including a fixed-side end plate and a spiral wall-shaped fixed-side wrap extending from the fixed-side end plate, and', 'an orbiting scroll including an orbiting-side end plate and a spiral wall-shaped orbiting-side wrap extending from the orbiting-side end plate,, 'a compression mechanism including'}the fixed-side wrap and the orbiting-side wrap being engaged with each other to form a compression chamber between the fixed and orbiting scrolls,the fixed scroll having an injection port configured to communicate with the compression chamber through a communication passageway located in the fixed-side end plate,the orbiting-side wrap having a thick portion thicker than an adjacent portion, the thick portion having an increasing tooth thickness portion, and the thick portion being located at a position corresponding to the injection port,a tooth thickness of the increasing tooth thickness portion increasing from a start of winding to an end of winding of the orbiting-side wrap, andthe thick portion having a thickness greater than or equal to a ...

SCROLL COMPRESSOR

A scroll compressor in which refrigerant gas is sucked into a hermetic container and is then compressed in a compression chamber. The scroll compressor includes an orbiting scroll including a second end plate having a second surface. The second end plate has an annular groove having an opening that opens into the second surface facing a frame and serving as a back-pressure chamber with the opening being closed by the frame, a gas communication path through which the groove communicates with the compression chamber in which the refrigerant gas is being compressed, and a first oil supply passage having a first opening that opens into at least one of a region inside the groove and a region outside the groove in the second surface and through which the refrigerating machine oil is supplied to a gap between the second surface and the frame. 1. A scroll compressor comprising:a fixed scroll including a first end plate and a first wrap located on the first end plate;an orbiting scroll including a second end plate and a second wrap located on a first surface of the second end plate that faces the fixed scroll, the orbiting scroll being disposed to define a compression chamber to compress refrigerant between the first wrap and the second wrap and orbiting relative to the fixed scroll;a frame facing a second surface opposite the first surface in the orbiting scroll and supporting a load on the orbiting scroll during compression of refrigerant gas; anda hermetic container containing the fixed scroll, the orbiting scroll, and the frame and including an oil sump in which refrigerating machine oil is held,the scroll compressor being configured to suck the refrigerant gas into the hermetic container and then compress the refrigerant gas in the compression chamber, an annular groove having an opening that opens into the second surface and serving as a back-pressure chamber with the opening being closed by the frame,', 'a gas communication path through which the groove communicates ...

SCROLL COMPRESSOR

A scroll compressor includes: a shell forming an outer case, the shell forming an oil reservoir in which lubricating oil is reserved; a fixed scroll stored in the shell; an orbiting scroll stored in the shell, the orbiting scroll forming a compression chamber together with the fixed scroll; a frame holding the orbiting scroll; a thrust plate disposed between the orbiting scroll and the frame; and a thrust oil return pipe fixed to the frame, the thrust oil return pipe being a pipe through which the lubricating oil flows to return to the oil reservoir, in which: a hole portion is formed on the thrust plate, the hole portion passing from a first surface portion to a second surface portion, the first surface portion slidably contacting with the orbiting scroll, the second surface portion facing the frame; and the thrust oil return pipe is inserted into the hole portion and is fit in the thrust plate, and an upper end portion of the thrust oil return pipe does not protrude from the first surface portion of the thrust plate. 1. A scroll compressor comprising:a shell forming an outer case, the shell forming an oil reservoir in which lubricating oil is reserved;a fixed scroll stored in the shell;an orbiting scroll stored in the shell, the orbiting scroll forming a compression chamber together with the fixed scroll;a frame holding the orbiting scroll;a thrust plate disposed between the orbiting scroll and the frame; anda thrust oil return pipe fixed to the frame, the thrust oil return pipe being a pipe through which the lubricating oil flows to return to the oil reservoir, wherein:a hole portion is formed on the thrust plate, the hole portion passing from a first surface portion to a second surface portion, the first surface portion slidably contacting with the orbiting scroll, the second surface portion facing the frame; andthe thrust oil return pipe is inserted into the hole portion and is fit in the thrust plate, and an upper end portion of the thrust oil return pipe does ...

SCROLL COMPRESSOR

Disclosed herein is a scroll compressor in which refrigerant is compressed in a compression chamber while the volume of the compression chamber is gradually decreased due to relative rotation of a fixed scroll and an orbiting scroll. In accordance with the disclosure, the scroll compressor is provided in which a pressure in a back-pressure chamber is managed in connection with a discharge refrigerant pressure so that the orbiting scroll is supported by the pressure in the back-pressure chamber without a power loss or an inner leak in an overall pressure section of a scroll. 1. A scroll compressor comprising:a housing including a suction port and a discharge port formed in an outer peripheral surface of the housing, the housing defining a suction chamber and a discharge chamber, the suction chamber communicating with the suction port and the discharge chamber communicating with the discharge port;a fixed scroll disposed in a first portion of the housing and having an outlet formed therein communicating with the discharge chamber;a drive motor mounted to a second portion of the housing including a rotary shaft coupled thereto;an orbiting scroll eccentrically coupled to an end of the rotary shaft and configured to revolve about the fixed scroll, the orbiting scroll cooperating with the fixed scroll to define a plurality of compression chambers;a back-pressure chamber defined by the housing between the orbiting scroll and the rotary shaft, the back-pressure chamber configured to urge the orbiting scroll towards the fixed scroll;a back-pressure regulation passage comprising a first passage through which the discharge chamber communicates with the back-pressure chamber and a second passage through which the back-pressure chamber communicates with the suction chamber; anda pressure regulation unit in communication with the back-pressure regulation passage configured to regulate a pressure in the back-pressure chamber in response to a pressure in the discharge chamber.2. ...

SCROLL COMPRESSOR

A scroll compressor includes a refrigerant suction pipe coupled to a discharge cover or a fixed scroll through a casing in a radial direction, a suction passage communicating the refrigerant suction pipe with a compression chamber, and a suction passage opening and closing valve disposed inside the suction passage to be slidable in an axial direction so as to selectively open or close the suction passage. Accordingly, when the compressor is stopped, oil or refrigerant in the casing can be restricted quickly so as not to flow back to the refrigerant suction pipe through a compression unit. 1. A scroll compressor comprising:a casing;a main frame provided in the casing;a fixed scroll having (i) a fixed end plate coupled to the main frame, (ii) a fixed wrap defined at a first side surface of the fixed end plate, and (iii) a discharge port defined through the fixed end plate at a side of the fixed wrap;an orbiting scroll having (i) an orbiting end plate located between the main frame and the fixed scroll, and (ii) an orbiting wrap defined at a side surface of the orbiting end plate, the orbiting wrap being configured to engage with the fixed wrap to thereby define a compression chamber in engagement with the fixed wrap;a discharge cover defining a discharge space that accommodates an outlet of the discharge port, the discharge cover being coupled to a second side surface of the fixed end plate opposite to the first side surface of the fixed end plate;a refrigerant suction pipe coupled to the discharge cover or the fixed scroll through the casing in a radial direction;a suction passage in fluid communication with the refrigerant suction pipe and the compression chamber; anda suction passage opening and closing valve provided inside the suction passage and configured to slide in an axial direction to thereby selectively open or close the suction passage.2. The scroll compressor of claim 1 , wherein the refrigerant suction pipe is coupled to the discharge cover or the fixed ...

SCROLL COMPRESSOR

A scroll compressor includes a first chamfered portion formed at a distal end potion of a spiral blade of a fixed scroll, a second chamfered portion formed at a distal end portion of a spiral blade of an orbiting scroll, a third chamfered portion formed at a bottom portion of the spiral blade of the fixed scroll, and a fourth chamfered portion formed at a bottom portion of the spiral blade of the orbiting scroll. An expression of 0<{(Av+Av)/2}/Ac<1×10is satisfied where a sectional area of a space between the first chamfered portion and the fourth chamfered portion is defined as Av, a sectional area of a space between the second chamfered portion and the third chamfered portion is defined as Av, and a sectional area of a compression chamber is defined as Ac. 1. A scroll compressor , comprising:a fixed scroll including a first base plate portion and a first spiral blade provided to stand on one surface of the first base plate portion;an orbiting scroll including a second base plate portion and a second spiral blade provided to stand on a surface of the second base plate portion opposite to the fixed scroll, and is configured to perform an orbiting motion with respect to the fixed scroll, the first spiral blade and the second spiral blade being in mesh with each other to form a compression chamber;a first chamfered portion formed at each of both corner portions of a distal end portion of the first spiral blade;a second chamfered portion formed at each of both corner portions of a distal end portion of the second spiral blade;a third chamfered portion formed on each of both sides of a bottom portion of the first spiral blade, the third chamfered portion having a same shape as a shape of the second chamfered portion; anda fourth chamfered portion formed on each of both sides of a bottom portion of the second spiral blade, the fourth chamfered portion having a same shape as a shape of the first chamfered portion,a chamfer dimension of the first chamfered portion and a ...

SCROLL COMPRESSOR

A scroll compressor includes a housing, an Oldham ring slidable on the housing by a first key mechanism, a fixed scroll, and an orbiting scroll slidable on the Oldham ring by a second key mechanism. The first key mechanism includes a first key provided to the Oldham ring and a first key groove formed in the housing. The first key protrudes toward the housing and radially inwardly from a ring portion. The housing includes a flange with a facing portion. The fixed scroll is fixed to the flange. The facing portion has an orbiting scroll facing surface, and an annular opening formed around the orbiting scroll facing surface and movably housing the ring portion. The first key groove is formed adjacent to a back surface of the facing portion opposite to the orbiting scroll facing surface so as to extend radially inwardly from the annular opening. 1. A scroll compressor comprising:a housing into which a drive shaft is inserted;an Oldham ring configured to be slidable on the housing by a first key mechanism in a first direction perpendicular to an axial center of the drive shaft;a fixed scroll fixed to the housing; andan orbiting scroll meshing with the fixed scroll and configured to be slidable on the Oldham ring by a second key mechanism in a second direction perpendicular to the axial center of the drive shaft,the first key mechanism including a first key provided to the Oldham ring and a first key groove formed in the housing,the first key protrudes from a ring portion of the Oldham ring toward the housing, and further protrudes in a radially inward direction from the ring portion, an orbiting scroll facing surface facing the orbiting scroll, and', 'an annular opening formed around the orbiting scroll facing surface and movably housing the ring portion, and, 'the housing including a flange to which the fixed scroll is fixed and which includes a facing portion having a predetermined thickness and having'}the first key groove being formed at a position adjacent to a back ...

ELECTRIC COMPRESSOR

The present disclosure relates to an electrical compressor, comprising a housing, a compression part, a motor part, a first journal bearing coupled between a frame and a rotating shaft, a second journal bearing coupled between an eccentric part and an orbit scroll, and a ball bearing coupled to another end of the rotating shaft. The compression part comprises a fixed scroll disposed at an internal side of the housing, an orbit scroll configured to compress a refrigerant while orbiting the fixed scroll, and a frame configured to support the fixed scroll. The motor part comprises a rotating shaft comprising an eccentric part coupled to the orbit scroll at one end thereof, a stator disposed at another internal side of the housing, and a rotor rotatably disposed with respect to the stator and configured to rotate around the rotating shaft. 1. An electric compressor , comprising:a housing; a fixed scroll and disposed at an internal side of the housing,', 'an orbit scroll configured to compress a refrigerant while orbiting the fixed scroll, and', 'a frame configured to support the fixed scroll;, 'a compression part comprising a rotating shaft comprising an eccentric part coupled to the orbit scroll at one end thereof,', 'a stator disposed at another internal side of the housing, and', 'a rotor rotatably disposed with respect to the stator and configured to rotate around the rotating shaft;, 'a motor part comprisinga first journal bearing coupled between the frame and the rotating shaft;a second journal bearing coupled between the eccentric part and the orbit scroll; anda ball bearing coupled to another end of the rotating shaft.2. The electric compressor of claim 1 , further comprisinga ball bearing coupling part,wherein the ball bearing is press-fitted and coupled to the ball bearing coupling part.3. The electric compressor of claim 2 , wherein the rotating shaft is coupled to the ball bearing while the ball bearing is coupled inside the ball bearing coupling part claim ...

SCROLL COMPRESSOR

A scroll compressor including an orbiting scroll having a small diameter compared to a case in which an oil groove is provided in a ring shape and constantly communicates with an outlet of an oil passage. The scroll compressor includes a fixed scroll and an orbiting scroll configured to orbit in engagement with the fixed scroll. The fixed scroll includes an outlet of an oil passage configured to communicate with an oil tray storing lubricant, the outlet of the oil passage connected to a sliding surface of the orbiting scroll. The orbiting scroll includes a plurality of oil grooves configured not to communicate with each other so as to supply the lubricant to a sliding surface of the fixed scroll, the plurality of oil grooves configured to communicate with the outlet at least once and not to communicate with the outlet at least once while the orbiting scroll rotates once. 1. A scroll compressor comprising:a fixed scroll fixed to an inside of a main body; andan orbiting scroll configured to orbit in engagement with the fixed scroll;wherein the fixed scroll comprises an outlet of an oil passage configured to communicate with an oil tray configured to store a lubricant, the outlet of the oil passage connected to a sliding surface of the orbiting scroll,wherein the orbiting scroll comprises a plurality of oil grooves, each of the plurality of oil grooves configured to supply the lubricant to a sliding surface of the fixed scroll and to not communicate with another of the plurality of oil grooves, andwherein each of the plurality of oil grooves is configured to communicate with the outlet at least once and to not communicate with the outlet at least once while the orbiting scroll rotates once.2. The scroll compressor of claim 1 , wherein each of the plurality of oil grooves is sealed by a sliding surface of the fixed scroll and the sliding surface of the orbiting scroll while in communication with the outlet.3. The scroll compressor of claim 1 , wherein claim 1 , among ...

Scroll-Type Expander And Fluid Machine Provided With Same

To provide a scroll-type expander having a relatively simple structure, small energy loss, and high durability and reliability. A pump-integrated expander 27 includes an expansion unit 50 configured as a scroll-type expander. In the expansion unit 50, a working fluid passage 51 e extending from a suction port 51 c open to the outside to an inlet 51 d open to an expansion chamber 54 is formed in a base 51 a of a fixed scroll 51. A working fluid supplied from the outside is guided to the expansion chamber 54 by the working fluid passage 51 e. In order to receive a thrust force acting on an orbiting scroll 53 and to prevent the rotation of the orbiting scroll 53, a ball-coupling anti-rotation mechanism 56 using balls as rolling members is disposed between a stepped face 52 c of an expander housing 52 and a base 53 a of the orbiting scroll 53.

OLDHAM COUPLING FOR A SCROLL COMPRESSOR

An Oldham coupling includes an annular ring having a first side and a second side opposite to the first side, a first and a second engaging groove that are diametrically opposed and located on the first side, and a third and a fourth engaging groove that are diametrically opposed and located on the second side. The first and second engaging grooves are configured to be engaged with a first and a second engaging projection provided on a fixed element. The third and fourth engaging grooves are configured to be engaged with a third and a fourth engaging projection provided on an orbiting scroll. The first and third engaging grooves are located in a first angular sector, and the second and fourth engaging grooves are located in a second diametrically opposed angular sector of the annular ring, the first and second angular sectors have an opening angle less than 40°. 1. An Oldham coupling for a scroll compressor , the Oldham coupling being configured to prevent relative rotation of an orbiting scroll and a non-orbiting scroll of the scroll compressor , the Oldham coupling including:an annular ring having a first side and a second side opposite to the first side;a first and a second engaging groove configured to be slidably engaged with a first and a second complementary engaging projection provided on a non-orbiting element, the first and second engaging grooves are diametrically opposed to each other and provided on the first side of the annular ring; wherein the first and third engaging grooves are located in a first angular sector of the annular ring, and the second and fourth engaging grooves are located in a second angular sector of the annular ring, diametrically opposed to the first angular sector, the first and second angular sectors each having an opening angle less than 40°; and', 'wherein a depth of the first engaging groove is less than a depth of the third engaging groove, and a depth of the second engaging groove is less than a depth of the fourth engaging ...

SCALLOP STEP FOR A SCROLL COMPRESSOR

A scroll member for a scroll compressor is disclosed. The scroll member includes a base member and a wrap member formed on a major surface of the base member. The wrap member includes a modified portion. The modified portion includes a base, a step, and a scallop. The base extends a first distance from the major surface. The step extends a second distance from the base. The scallop extends a third distance from the scallop. The scallop is located at a wrap surface of the wrap member. The wrap surface is disposed relatively away from the major surface relative to the step. 1. A scroll member for a scroll compressor , comprising:a base member; anda wrap member formed on a major surface of the base member;wherein the wrap member includes a modified portion, the modified portion including a base, a step, and a scallop, the base extending a first distance from the major surface, the step extending a second distance from the base, the scallop extending a third distance from the step, the scallop being located at a wrap surface of the wrap member, the wrap surface being disposed relatively away from the major surface relative to the step.2. The scroll member according to claim 1 , wherein a thickness of the base is relatively greater than a thickness of the step.3. The scroll member according to claim 2 , wherein the thickness of the step is relatively greater than a thickness of the scallop.4. The scroll member according to claim 1 , wherein the modified portion is disposed at a tip portion of the wrap member claim 1 , the tip portion being disposed adjacent to a discharge port of the scroll compressor.5. The scroll member according to claim 1 , wherein the base member and the wrap member are formed of a single piece claim 1 , unitary construction.6. The scroll member according to claim 1 , wherein the scroll member further includes a groove in the wrap surface of the wrap member.7. A scroll compressor claim 1 , comprising:a compressor housing;a non-orbiting scroll member ...

SCROLL COMPRESSOR

A scroll compressor is provided, comprising: a compression mechanism comprising a non-orbiting scroll member and an orbiting scroll member, wherein the orbiting scroll member is axially displaceable between an engagement position and a disengagement position; a main bearing housing adapted to support the compression mechanism; a back pressure chamber formed between the orbiting scroll member and the main bearing housing, wherein the back pressure chamber is in communication with at least one of the compression chambers via a communication passage provided in the orbiting scroll member or the non-orbiting scroll member and is adapted to apply a back pressure to the orbiting scroll member to bias the orbiting scroll member toward the engagement position; and a first sealing means provided between the back pressure chamber and a suction zone of the compression mechanism and capable of maintaining sealing when the orbiting scroll member is axially displaced. 1. A scroll compressor , comprising:a compression mechanism comprising a non-orbiting scroll member and an orbiting scroll member, wherein the orbiting scroll member is axially displaceable between an engagement position, in which the orbiting scroll member and the non-orbiting scroll member are axially engaged with each other to form a series of compression chambers for compressing fluid, and a disengagement position, in which the orbiting scroll member is axially separated from the non-orbiting scroll member;a main bearing housing adapted to support the compression mechanism;a back pressure chamber formed between the orbiting scroll member and the main bearing housing, wherein the back pressure chamber is in communication with at least one of the compression chambers via a communication passage provided in the orbiting scroll member or the non-orbiting scroll member and is adapted to apply a back pressure to the orbiting scroll member to bias the orbiting scroll member toward the engagement position; anda first ...

COMPRESSOR HAVING CENTRIFUGATION STRUCTURE FOR SUPPLYING OIL

A scroll compressor is provided which is capable of supplying oil stored in an oil storage chamber upward through a rotary shaft to lubricate a bearing portion. The scroll compressor may include a casing in which oil is stored in an oil storage chamber formed at a lower portion of the casing, a drive motor provided in an inner space of the casing, a rotary shaft coupled to the drive motor and including an oil supply path configured to guide the oil stored in the oil storage chamber and at least one oil hole that passes from the oil supply path to an outer circumferential surface of the rotary shall a main frame coupled to the rotary shaft and provided under the drive motor, a fixed scroll coupled to the rotary shaft and provided under the main frame, and an orbiting scroll provided between the main frame and the fixed scroll, into which the rotary shaft is inserted and to which the rotary shaft is eccentrically coupled, the orbiting scroll performing an orbiting movement to form a compression chamber with the fixed scroll. The oil guided upward through the oil supply path may be discharged through the at least one oil hole and supplied to the outer circumferential surface of the rotary shaft. 1. A scroll compressor , comprising:a casing in which oil is stored in an oil storage chamber formed at a lower portion of the casing;a drive motor provided in an inner space of the casing;a rotary shaft coupled to the drive motor and including an oil supply path configured to guide the oil stored in the oil storage chamber upward and at least one oil hole that passes from the oil supply path to an outer circumferential surface of the rotary shaft;a main frame coupled to the rotary shaft and provided under the drive motor;a fixed scroll coupled to the rotary shaft and provided under the main frame; andan orbiting scroll provided between the main frame and the fixed scroll and into which the rotary shaft is inserted and to which the rotary shaft is eccentrically coupled, 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 ...

ORBITING SCROLL DEVICE LUBRICATION

A scroll device includes a fixed scroll with an idler shaft bearing, an orbiting scroll with another idler shaft bearing; and an eccentric idler shaft having first and second arms extending in opposite directions and ending at first and second ends, the first and second arms supported by the fixed scroll idler shaft bearing and the orbiting scroll idler shaft bearing, respectively. The eccentric idler shaft has a hollow core extending from the first end to the second end, with at least one channel extending through the first arm and enabling fluid communication between the hollow core and the at least one first bearing, and at least one second channel extending through the second arm and enabling fluid communication between the hollow core and the least one second bearing. 1. A scroll device comprising:a fixed scroll comprising at least one first bearing;an orbiting scroll comprising at least one second bearing;an eccentric idler shaft having a first arm terminating at a first end and supported by the at least one first bearing and a second arm terminating at a second end and supported by the least one second bearing, the eccentric idler shaft comprising a hollow core extending from the first end to the second end;at least one first channel extending through the first arm and enabling fluid communication between the hollow core and the at least one first bearing; andat least one second channel extending through the second arm and enabling fluid communication between the hollow core and the least one second bearing.2. The scroll device of claim 1 , further comprising an idler shaft cap secured to the fixed scroll claim 1 , the idler shaft cap defining a central passageway in fluid communication with the hollow core.3. The scroll device of claim 1 , further comprising an orifice plug removably secured within the central passageway.4. The scroll device of claim 1 , further comprising a plug removably secured within the hollow core proximate the second end claim 1 , the ...

SCROLL COMPRESSOR

A scroll compressor includes a casing, a low-pressure space and a compression mechanism. The compression mechanism includes fixed and movable scrolls, a fluid chamber including first and second compression chambers, and an adjustment mechanism. The fluid chamber has different discharge start points between the first and second compression chambers. An oil inflow groove is formed in one sliding surface, and an oil relief passage is formed in the other sliding surface. The oil relief passage includes a communication portion that communicates with the oil inflow groove in a predetermined angular range, lubricating oil flowing from the oil inflow groove into the low-pressure space through the communication portion. The predetermined angular range is from a position between a discharge start point of the first compression chamber and a discharge start point of the second compression chamber to a position after the discharge start of the second compression chamber. 1. A scroll compressor comprising:a casing;a low-pressure space inside the casing; and a fixed scroll including a fixed-side end plate having a disk shape, and a fixed-side wrap having a spiral shape and rising from the fixed-side end plate, the fixed scroll being fixed to the casing,', 'a movable scroll including a movable-side end plate having a disk shape that substantially slides on the fixed-side end plate, and a movable-side wrap having a spiral shape that rises from the movable-side end plate and has a different circumferential length from the fixed-side wrap, the movable scroll being configured to make an eccentric rotational motion with respect to the fixed scroll while meshing with the fixed scroll,', 'a fluid chamber including a first compression chamber formed between an inner peripheral surface of the fixed-side wrap and an outer peripheral surface of the movable-side wrap, and a second compression chamber formed between an outer peripheral surface of the fixed-side wrap and an inner peripheral ...

SCROLL COMPRESSOR AND AIR CONDITIONING APPARATUS INCLUDING THE SAME

A scroll compressor includes a fixed scroll and a movable scroll. The fixed scroll has a spiral fixed-side wrap positioned upright on a surface of a fixed-side plate. The movable scroll is orbitably disposed to face the fixed scroll. The movable scroll has a spiral movable-side wrap positioned upright on a surface of a movable-side plate, with the movable-side wrap being configured to mesh with the fixed-side wrap. A side clearance is formed between a side surface of the fixed-side wrap and a side surface of the movable-side wrap so as to increase from an outer peripheral side toward an inner peripheral side of each of the wraps. 1. A scroll compressor , comprising:a fixed scroll having a spiral fixed-side wrap positioned upright on a surface of a fixed-side plate; anda movable scroll orbitably disposed to face the fixed scroll, the movable scroll having a spiral movable-side wrap positioned upright on a surface of a movable-side plate, the movable-side wrap being configured to mesh with the fixed-side wrap,a side clearance being formed between a side surface of the fixed-side wrap and a side surface of the movable-side wrap so as to increase from an outer peripheral side toward an inner peripheral side of each of the wraps.2. The scroll compressor according to claim 1 , whereinthe increase in the side clearance is set such that the side clearance approaches a uniform state from the outer peripheral side to the inner peripheral side during an orbiting operation of the movable scroll.3. The scroll compressor according to claim 1 , whereinthe increase in the side clearance is set such that an increase rate of the side clearance becomes larger from the outer peripheral side toward the inner peripheral side.4. The scroll compressor according to claim 1 , whereinthe increase in the side clearance is obtained by decreasing a tooth thickness of at least one of the fixed-side wrap and the movable-side wrap from the outer peripheral side toward the inner peripheral side.5. ...

SCROLL COMPRESSOR AND METHOD OF MANUFACTURING THE SCROLL COMPRESSOR

A scroll compressor includes an orbiting scroll, a fixed scroll, and a shell. The fixed scroll is configured to form a compression chamber together with the orbiting scroll. The shell accommodates the orbiting scroll and the fixed scroll. The fixed scroll includes a base plate and a scroll body. The base plate is fixed to the shell. The scroll body projects from the base plate toward the orbiting scroll. The base plate has a stress absorber that is formed outside the scroll body in a radial direction and that is configured to absorb stress from an outer region in the radial direction. A weld joint is formed in an overlap region where the shell and the base plate are fixed to each other and overlap each other. The stress absorber is provided on a line that passes through a center of the base plate and the weld joint. 1. A scroll compressor , comprising:an orbiting scroll;a fixed scroll configured to form a compression chamber together with the orbiting scroll; anda shell that accommodates the orbiting scroll and the fixed scroll,the fixed scroll includinga base plate fixed to the shell, anda scroll body that projects from the base plate toward the orbiting scroll,the base plate having a plurality of stress absorbers that are formed outside the scroll body in a radial direction and that are each configured to absorb stress from an outer region in the radial direction,a plurality of weld joints being formed in an overlap region where the shell and the base plate are fixed to each other and overlap each other,the plurality of stress absorbers each being provided on a line that passes through a center of the base plate and a corresponding one of the plurality of weld joints.2. The scroll compressor of claim 1 ,wherein the shell has a first inner wall surface and a first projection that projects from the first inner wall surface and that serves as a location at which the fixed scroll is positioned, andwherein the fixed scroll is fixed to the first inner wall surface.3. ...

SCROLL COMPRESSOR

A scroll compressor includes a fixed scroll and an orbiting scroll. Each of the fixed and orbiting scrolls includes an end plate and a spiral wrap standing on a front surface of the end plate. The scrolls are arranged such that the front surfaces of the end plates face each other and the wraps are engaged with each other. The orbiting scroll eccentrically rotates, without turning on an axis thereof, with respect to the fixed scroll to compress fluid in compression chambers respectively formed inside and outside the wrap of the orbiting scroll. Each wrap is formed in a shape such that at least one of the compression chambers serves as a rate-reduced compression chamber where a volume change rate thereof is reduced in a middle of a compression phase. 1. A scroll compressor comprising:a fixed scroll; andan orbiting scroll an end plate and', 'a spiral wrap standing on a front surface of the end plate,, 'each of the fixed scroll and the orbit in scroll including'}the fixed scroll and the orbiting scroll being arranged such that the front surfaces of the end plates face each other and the wraps are engaged with each other,the orbiting scroll eccentrically rotates, without turning on an axis thereof, with respect to the fixed scroll to compress fluid in compression chambers respectively formed inside and outside the wrap of the orbiting scroll, andeach wrap of the fixed scroll and the orbiting scroll being formed in a shape such that at least one of the compression chambers serves as a rate-reduced compression chamber where a volume change rate thereof is reduced in a middle of a compression phase.2. The scroll compressor of claim 1 , whereineach wrap of the fixed scroll and the orbiting scroll is formed in an involute curve shape, anda side surface of each wrap facing the rate-reduced compression chamber is formed in a shape of a modified involute curve such that a base circle radius decreases in a stepwise manner from an outer end to an inner end of each wrap.3. The ...

Oldham coupling with enhanced key surface in a scroll compressor

An Oldham coupling structure for a scroll compressor decreases Oldham coupling pressure loading without increasing compressor diameter or significantly increasing orbiting scroll or Oldham coupling inertia. The Oldham coupling key height and area are increased by recessing the key face into the ring portion of the Oldham coupling, increasing the key height and adding pads to the involute side of the orbiting scroll base plate to extend the key slot, potentially resulting in reduced compressor diameter and/or reduced orbiting scroll and Oldham coupling inertia.

Axially Compliant Orbiting Plate Scroll and Scroll Pump Comprising the Same

An orbiting plate scroll of a scroll pump includes an orbiting plate having a first side and a second side, an orbiting scroll blade projecting in an axial direction from the first side of the orbiting plate, and a flexure whose compliance is in the axial direction. The flexure is coupled to the orbiting plate at the second side of the orbiting plate, and couples the orbiting plate and orbiting scroll blade to bearings that allow for free rotation of the orbiting plate scroll about a longitudinal axis, while constraining motion of the orbiting plate scroll in the remaining degrees of freedom. 1. An orbiting plate scroll , comprising:an orbiting plate having a first side and a second side;an orbiting scroll blade projecting in an axial direction from the first side of the orbiting plate; anda flexure coupled to the orbiting plate at the second side of the orbiting plate, and wherein the compliance of the flexure is substantially only in the axial direction.2. The orbiting plate scroll of claim 1 , wherein the flexure comprises a cylindrical hub whose central longitudinal axis extends in the axial direction claim 1 , and a flange that extends from the hub and connects the hub to the orbiting plate claim 1 , andwherein the flange comprises a web that is spaced axially from the orbiting plate with the flexure relaxed such that a gap exists between the web and the orbiting plate, and a union integral with the web and by which the flexure is integrated with the orbiting plate.3. The orbiting plate scroll of claim 2 , wherein the web has the form of a disc that spans the hub and the union claim 2 , the union is an annular member claim 2 , and the thickness of the web in the axial direction is less than that of the union.4. The orbiting plate scroll of claim 2 , wherein the web extends from the hub to the union in a direction perpendicular to the axial direction.5. The orbiting plate scroll of claim 2 , wherein an interference fit couples the flange and the orbiting plate ...

Scroll Fluid Machine

A scroll fluid machine is provided that includes: a fixed scroll; an orbiting scroll opposed to the fixed scroll, the orbiting scroll orbiting with a plurality of compression chambers formed between the orbiting scroll and the fixed scroll; a drive shaft driving the orbiting scroll; and a backside plate provided between the drive shaft and the orbiting scroll, an alignment hole being provided in each of the orbiting scroll and the backside plate, and an alignment pin for alignment and a seal member for sealing the compression chambers being provided in the alignment holes. 1. A scroll fluid machine comprising:a fixed scroll;an orbiting scroll opposed to the fixed scroll, the orbiting scroll orbiting with a plurality of compression chambers formed between the orbiting scroll and the fixed scroll;a drive shaft driving the orbiting scroll; anda backside plate provided between the drive shaft and the orbiting scroll,wherein an alignment hole is provided in each of the orbiting scroll and the backside plate, and an alignment pin for alignment and a seal member for sealing the compression chambers are provided in the alignment holes.2. The scroll fluid machine according to claim 1 , whereinthe alignment holes are provided on an inner side than the drive shaft is.3. The scroll fluid machine according to claim 1 , whereinthe alignment pin has no screw groove or protrusion thereon.4. The scroll fluid machine according to claim 1 , whereinthe seal member includes a screw groove or a protrusion thereon.5. The scroll fluid machine according to claim 1 , whereinthe seal member has a larger diameter than the alignment pin.6. The scroll fluid machine according to claim 1 , whereina sealant is filled between the seal member and the alignment holes.7. The scroll fluid machine according to claim 1 , whereinthe seal member has a tapered end.8. The scroll fluid machine according to claim 1 , whereinthe alignment pin and the seal member are formed integrally.9. The scroll fluid machine ...

Scroll -Type Compressor

A housing forms one portion of a compressor case and supports a bearing for a main shaft has an opening through which gas Is sucked; a suction space extending from the opening to inside of the compressor; a first gas passageway extending from the suction space in the direction of the axis of the main shaft; a second gas passageway connecting the first gas passageway and the space in which the main shaft bearing is disposed. A shell forms the other portion of the compressor case and is fastened to the housing has a third gas passageway connecting the first gas passageway and the internal space of a compression mechanism. The first gas passageway and the third gas passageway are connected to each other further on the outer side of the main shaft in the rotation radius direction than the movable region of the bottom plate of a movable scroll. 1. A scroll-type compressor comprising: a shell which forms the other portion of the compressor case and which is fastened to the housing having a third gas passageway communicating with the first gas passageway and an internal space of a compression mechanism, characterized in that', 'the first gas passageway and the third gas passageway communicate with each other at an outer side than a region where a bottom plate of a movable scroll can move with respect to a direction of a turning radius of the main shaft., 'a housing which forms one portion of a compressor case and which supports a bearing for a main shaft having an opening through which a gas to be compressed is sucked, a suction space extending with a cylindrical-shape from the opening into the compressor, a first gas passageway extending from the suction space along a rotation axis of the main shaft, and a second gas passageway communicating with the first gas passageway and a space in which the bearing is disposed; and'}2. The scroll-type compressor according to claim 1 , wherein the housing has a lubricating oil passageway which is independent from the first gas ...

Co-rotating scroll compressor and assembly method therefor

Provided is a co-rotating scroll compressor comprising a synchronous drive mechanism that can achieve a long life. The compressor comprises a driving side scroll member ( 90 ) driven to rotate about a driving side rotation axis CL 1, a driven side scroll member ( 70 ) driven to rotate about a driven side rotation axis CL 2, a hollowed drive shaft ( 6 ) that is connected to the driving side scroll member ( 90 ), and driven by a motor ( 5 ) to rotate, and a driven shaft ( 20 ) that is disposed inside the drive shaft ( 6 ), and has one end connected to the drive shaft ( 6 ) via a first flexible coupling ( 21 ) and the other end connected to the driven side scroll member ( 70 ) via a second flexible coupling ( 22 ).

SCROLL COMPRESSOR

According to a scroll compressor associated with the present disclosure, the entire cross-sectional area of bypass holes formed at a compression chamber with a larger volume reduction gradient between the both compression chambers may be formed to be larger than that of bypass holes at the other compression chamber to prevent over-compression at the compression chamber with a larger volume reduction gradient, thereby enhancing the entire efficiency of the compressor. 1. A scroll compressor having both compression chambers with different volume reduction gradients , wherein the entire cross-sectional area of bypass holes formed at a compression chamber with a larger volume reduction gradient between the both compression chambers is formed to be larger than that of bypass holes at the other compression chamber.2. The scroll compressor of claim 1 , wherein the number of bypass holes formed at a compression chamber with a larger volume reduction gradient between the both compression chambers is formed to be greater than that of bypass holes formed at the other compression chamber.3. The scroll compressor of claim 1 , wherein the individual cross-sectional area of bypass holes formed at a compression chamber with a larger volume reduction gradient between the both compression chambers is formed to be larger than that of bypass holes formed at the other compression chamber.4. A scroll compressor claim 1 , comprising:a fixed scroll having a fixed wrap;a orbiting scroll tooth-coupled to the fixed wrap to have a orbiting wrap forming a first and a second compression chamber on an outer and an inner surface thereof, and a rotating shaft coupling portion is formed at a central portion thereof to perform orbiting movement with respect to the fixed scroll;a rotating shaft having an eccentric portion in which the eccentric portion is coupled to a rotating shaft coupling portion of the orbiting scroll to be overlapped with the orbiting wrap in a radial direction; anda driving unit ...

Compressor High-Side Axial Seal And Seal Assembly Retainer

A compressor may include a non-orbiting scroll, an orbiting scroll, a drive shaft, a bearing housing and an annular seal. The non-orbiting scroll includes a first spiral wrap. The orbiting scroll includes an end plate having a second spiral wrap ending from a first side of the end plate and an annular hub extending from a second side of the end plate. The first and second spiral wraps cooperate to compress working fluid from a suction pressure to a discharge pressure. The drive shaft includes a crankpin received in the hub and drives the orbiting scroll. The bearing housing rotatably supports the drive shaft and may define a biasing chamber containing working fluid biasing the orbiting scroll toward the non-orbiting scroll in an axial direction. The annular seal may engage a diametrical surface of the hub and engage the bearing housing, thereby defining the biasing chamber. 1. A compressor comprising:a non-orbiting scroll including a first spiral wrap;an orbiting scroll including an end plate having a second spiral wrap ending from a first side of said end plate and an annular hub extending from a second side of said end plate, said first and second spiral wraps cooperating to compress working fluid from a suction pressure to a discharge pressure;a drive shaft having a crankpin received in said hub and driving said orbiting scroll in an orbital path relative to said non-orbiting scroll;a bearing housing rotatably supporting said drive shaft and defining a biasing chamber containing working fluid biasing said orbiting scroll toward said non-orbiting scroll in an axial direction; anda first annular seal engaging a diametrical surface of said hub and engaging said bearing housing, thereby defining said biasing chamber.2. The compressor of claim 1 , wherein said working fluid disposed within said biasing chamber is at an intermediate pressure between said suction pressure and said discharge pressure claim 1 , and wherein said first annular seal separates said ...

SCROLL COMPRESSOR

A scroll compressor is provided with a stationary scroll, an orbiting scroll, and a discharge port () through which a fluid that has been compressed by both the scrolls is discharged. An end plate of the orbiting scroll is provided with an end-plate side stepped portion formed in such a way that, along a spiral of a spiral wrap (B), the height thereof increases toward a central side of the spiral and decreases toward an outer end side thereof. A spiral wrap (B) of the stationary scroll is provided with a wall-portion side stepped portion formed corresponding to the end-plate side stepped portion in such a way that the height thereof decreases toward the central side of the spiral and increases toward the outer end side thereof. Of a pair of compression chambers (A, B) which face each other on either side of the center of the stationary scroll, the ventral side compression chamber (A) in which the pressure is higher communicates with the discharge port () before the dorsal side compression chamber (B) in which the pressure is lower communicates with the discharge port (). 14-. (canceled)5. A scroll compressor comprising:a stationary scroll including a spiral wall portion erected on one side surface of an end plate;an orbiting scroll that includes a spiral wall portion erected on one side surface of an end plate and is supported so as to be capable of orbital revolution movement while being prevented from self-rotation by the wall portions being engaged with each other; anda discharge port through which a fluid that has been compressed by both the scrolls is discharged;an end-plate side stepped portion being provided on the one side surface of the end plate of one of the scrolls, the end-plate side stepped portion being formed in such a way that, along a spiral of the wall portion, a height of the end-plate side stepped portion increases toward a central side of the spiral and decreases toward an outer end side of the spiral; anda wall-portion side stepped portion ...

SCROLL COMPRESSOR

A scroll compressor according to the present disclosure includes a fixed scroll, an orbiting scroll forming first and compression chambers with the fixed scroll, first and second compression chamber oil supply holes formed through the orbiting scroll to communicate with the first compression chamber and the second compression chamber, respectively, wherein when a section in which the first compression chamber oil supply hole is opened toward the first compression chamber is a first oil supply section and a section in which the second compression chamber oil supply hole is opened toward the second compression chamber, a non-overlap section between the first oil supply section and the second oil supply section may be longer than an overlap section between the first oil supply section and the second oil supply section, so as to prevent communication between the first and second compression chambers, thereby suppressing leakage between the compression chambers. 1. A scroll compressor comprising:a casing;a driving motor provided in the casing;a fixed scroll disposed at a side of the driving motor, the fixed scroll including a fixed end plate and a fixed wrap positioned at the fixed end plate;an orbiting scroll including (i) an orbiting end plate facing the fixed end plate, and (ii) an orbiting wrap positioned at the orbiting end plate and configured to be engaged with the fixed wrap to define a first compression chamber and a second compression chamber;a first compression chamber oil supply hole that is defined at the orbiting end plate and configured to be in fluid communication with the first compression chamber; anda second compression chamber oil supply hole that is defined at the orbiting end plate and configured to be in fluid communication with the second compression chamber,wherein the first compression chamber oil supply hole is configured to be opened toward the first compression chamber during a first oil supply stage,wherein the second compression chamber oil ...

Compressor

A compressor may include first and second scrolls, a hub plate and a valve. The first scroll may include an end plate defining first and second sides, a primary discharge passage extending therethrough, and a secondary discharge passage extending therethrough and located radially outward from the primary discharge passage. The hub plate may be mounted to the first scroll and may include first and second opposite sides and a hub discharge passage in fluid communication with the primary discharge passage. The first side of the hub plate may face the second side of the end plate and may include a valve guide extending axially toward the end plate adjacent the hub discharge passage. The valve member may be secured on the valve guide for axial movement between open and closed positions to respectively allow and restrict fluid communication between the secondary discharge passage and the hub discharge passage. 1. A compressor comprising:a non-orbiting scroll member including a first end plate and a first spiral wrap, said first end plate including a primary discharge passage and a secondary discharge passage located radially outward relative to said primary discharge passage;an orbiting scroll member including a second end plate having a second spiral wrap extending therefrom and meshingly with said first spiral wrap;a hub plate mounted to said non-orbiting scroll member and having a hub discharge passage extending therethrough and in fluid communication with said primary discharge passage, said hub plate including a valve guide disposed adjacent said hub discharge passage;a valve member disposed radially outward relative to said valve guide and movable relative to said valve guide between open and closed positions, said valve member restricting fluid flow through said secondary discharge passage when in the closed position to restrict fluid communication between said secondary discharge passage and said hub discharge passage, said valve member allowing fluid flow through ...

LIQUID REFRIGERANT PUMP

A pump as provided includes an inlet, an outlet, and a scroll pumping element. The scroll pumping element includes a fixed scroll component having one or more fixed scrolls and orbiting scroll component having one or more orbiting scrolls for fluid pumping. The fixed scroll component and the orbiting scroll component are arranged so as to be capable of providing pressurized fluid to a thrust bearing and prevent contact between the fixed scroll component and the orbiting scroll component. 1. A pump , comprising:an inlet, an outlet, and a scroll pumping element, wherein said scroll pumping element comprises:a fixed scroll component having one or more fixed scrolls and orbiting scroll component having one or more orbiting scrolls for fluid pumping wherein said fixed scroll component and said orbiting scroll component are arranged so as to be capable of providing pressurized fluid to a thrust bearing and prevent contact between said fixed scroll component and said orbiting scroll component.2. The pump of wherein a wrap length of said one or more orbiting scrolls is 0.75 wraps to 1.25 wraps long claim 1 , and a wrap length of said one or more fixed scrolls is 1.75 wraps to 2.25 wraps long.3. The pump of wherein a wrap length of said one or more orbiting scrolls is one wrap long and a wrap length of said one or more fixed scrolls is two wraps long.4. The pump of claim 1 , further comprising an Oldham coupling associated with said orbiting scroll component.5. The pump of claim 4 , wherein said Oldham coupling comprises a wear-resistant coating.6. The pump of claim 5 , wherein said wear-resistant coating is hard anodized aluminum.7. The pump of claim 1 , further comprising an orbital drive mechanism in fluid communication with said outlet claim 1 , said orbital drive mechanism comprising a drive shaft claim 1 , two drive shaft bearings that support said drive shaft claim 1 , and a radially compliant crank mechanism associated with said drive shaft.8. The pump of claim 7 , ...

COMPRESSOR

A compressor includes a discharge guide provided to communicate a discharge port and a bypass port to a discharge cover so that refrigerant discharged from the discharge port and the bypass port is guided to the discharge cover and a middle-pressure chamber formed by the fixed scroll, the back-pressure cover, and the discharge guide. The compressor according to the embodiments guarantees the space in which the bypass valve can be installed by a discharge guide mounted to a discharge portion of the fixed scroll, and at the same time forms the middle pressure portion, resulting in efficiency improvement of the compressor. The compressor according to the embodiments reduces noise and vibration generated from the discharge portion of the fixed scroll by the discharge guide. 1. A compressor comprising:a main body including a high-pressure chamber and a low-pressure chamber;a discharge cover fixable to an interior space of the main body to divide the interior space of the main body into a suction space and a discharge space;a fixed scroll;an orbiting scroll;a compression chamber formed by the fixed scroll and the orbiting scroll to compress a refrigerant;a discharge port formed in the fixed scroll to discharge the compressed refrigerant to an outside of the compression chamber;a bypass port formed in the fixed scroll to discharge a refrigerant being compressed in the compression chamber to the outside of the compression chamber;a discharge guide provided on the fixed scroll to guide the refrigerant discharged from the discharge port and the bypass port to the discharge cover;a back-pressure cover provided over the discharge guide to separate the high-pressure chamber from the low-pressure chamber; anda middle-pressure chamber formed by the fixed scroll, the back-pressure cover, and the discharge guide.2. The compressor according to claim 1 , wherein the discharge guide includes:a first cover portion configured to cover an uppermost surface of the fixed scroll;a second ...

Scroll compressor and refrigeration apparatus including same

A scroll compressor includes a casing, compression mechanism housed in the casing, and drive shaft. The compression mechanism includes fixed and movable scrolls, and a housing. The housing includes a bearing portion configured to rotatably support the drive shaft, a body portion continuous with the bearing portion and extending radially outward, a pressing portion provided radially outside the body portion to press the casing, and a supporting portion extending from a face of the body portion near the fixed scroll. An end face of the supporting portion near the fixed scroll is a fastening face to which the fixed scroll is fastened. A gap is formed between an inner peripheral surface of the casing and outer peripheral surfaces of the body and supporting portions. An axial length of the gap is greater than or equal to an axial length of an inner peripheral surface of the supporting portion.

COMPRESSOR

A compressor including a casing having a cylindrical shape, and a compression mechanism housed in the casing. The compression mechanism having a housing including a pressing portion pressed against the casing and a weld portion welded to the casing. At least part of the pressing portion and at least part of the weld portion being arranged side by side in a circumferential direction of the casing.

COMPRESSOR

A compressor includes a compression mechanism, a drive shaft, a bearing, and an oil supply passage configured to supply lubrication oil to a clearance between the drive shaft and the bearing. The drive shaft includes a large-diameter shaft part supported by the bearing, and a small-diameter shaft part connected to a lower end part of the large-diameter shaft part. A sealing part is configured to reduced or prevent oil leakage from the bearing includes an oil receiving surface formed in the bearing housing so as to face a stepped surface formed at a boundary between the large-diameter shaft part and the small-diameter shaft part. A clearance is formed between the oil receiving surface and the stepped surface so as to surround an outer periphery of the small-diameter shaft part. 1. A compressor comprising:a casing;a compression mechanism housed in the casing and configured to compress fluid by rotational movement;a rotary drive shaft housed in the casing and connected to the compression mechanism at an upper end part of the rotary drive shaft;a bearing with the rotary drive shaft penetrating therethrough;an oil supply passage formed in the rotary drive shaft to supply lubrication oil to a clearance between the rotary drive shaft and the bearing;a sealing part configured to reduce or prevent downward oil leakage from the bearing; anda bearing housing formed with an insertion hole, the bearing being inserted in the insertion hole and the bearing housing being fixed to the casing, a large-diameter shaft part supported by the bearing, and', 'a small-diameter shaft part connected to a lower end part of the large-diameter shaft part so as to be coaxial with the large-diameter shaft part,, 'the rotary drive shaft including'}the sealing part including an oil receiving surface formed in the bearing housing so as to face a stepped surface formed at a boundary between the large-diameter shaft part and the small-diameter shaft part with a clearance being formed between the oil ...

SCROLL COMPRESSOR

A back pressure chamber forming portion forms a back pressure chamber configured to accumulate a high pressure refrigerant discharged from a working chamber and thereby generate a refrigerant pressure, which urges a movable scroll against a stationary scroll. A balancer is placed at an inside of the back pressure chamber and is configured to be rotated by a rotatable shaft. The back pressure chamber forming portion has a discharge hole that communicates between a radially outer side of the back pressure chamber, which is located radially outward in a radial direction of an axis of the rotatable shaft, and a suction chamber to discharge a liquid phase refrigerant from the back pressure chamber into the suction chamber when the liquid phase refrigerant flows from the working chamber into the back pressure chamber. 1. A scroll compressor comprising:a stationary scroll; the movable scroll is configured to revolve relative to the stationary scroll when the movable scroll is driven by a rotatable shaft; and', 'when the movable scroll revolves, a volume of the working chamber progressively changes, so that a refrigerant is suctioned from a suction chamber into the working chamber and is discharged from the working chamber as a high pressure refrigerant after compression of the suctioned refrigerant in the working chamber;, 'a movable scroll that forms a working chamber between the stationary scroll and the movable scroll, whereina back pressure chamber forming portion that forms a back pressure chamber, wherein the back pressure chamber is configured to accumulate the high pressure refrigerant discharged from the working chamber and thereby generate a refrigerant pressure, which urges the movable scroll against the stationary scroll; anda balancer that is placed at an inside of the back pressure chamber, wherein the balancer is configured to be rotated by the rotatable shaft and alleviate weight unbalance generated at the rotatable shaft due to presence of the movable ...

Scroll type device incorporating spinning or co-rotating scrolls

A co-rotating scroll is disclosed having a motor having a shaft, a drive scroll connected to the shaft for moving the drive scroll, a driven scroll connected to the drive scroll to be moved by the drive scroll, and an idler shaft for aligning the drive scroll and the driven scroll and for allowing the driven scroll to be moved by the drive scroll.

Scroll compressor

A scroll compressor includes a rotation shaft, a fixed scroll, a movable scroll, a compression chamber, and a shaft support. A movable member is movable in an axial direction of the rotation shaft toward and away from the movable scroll. A rotation restriction mechanism includes a pin and a hole that is loosely fitted into the hole. An orbital radius switching mechanism moves the movable member in a first direction when a rotation speed of the rotation shaft is increased, which decreases an orbital radius of the pin relative to the hole so that an orbital radius of the movable scroll is decreased, and moves the movable member in a second direction when the rotation speed of the rotation shaft is decreased, which increases the orbital radius of the pin relative to the hole so that the orbital radius of the movable scroll is increased.

SCROLL COMPRESSOR

A scroll compressor includes a rotation shaft, a fixed scroll, a movable scroll, a compression chamber, a shaft support, a housing, a movable member arranged in the shaft support, and a rotation restriction mechanism configured to restrict rotation of the movable scroll. The rotation restriction mechanism includes pins, recesses into which the respective pins are loosely fitted, and the movable member. The movable member includes the pins or the recesses. A switching mechanism is configured to switch the movable member between a state in which movement of the movable member in a radial direction of the rotation shaft is restricted and a state in which the restriction is canceled and the movable member can move freely, which changes a movable range of the movable member in the radial direction so that an orbital radius of the movable scroll is changed. 1. A scroll compressor comprising:a rotation shaft;a fixed scroll including a fixed spiral wall;a movable scroll including a movable spiral wall engaged with the fixed spiral wall, wherein the movable scroll orbits when the rotation shaft is rotated;a compression chamber defined between the fixed spiral wall and the movable spiral wall, wherein the compression chamber has a volume that is decreased when the movable scroll orbits, and refrigerant is compressed in the compression chamber when the volume is decreased;a shaft support that supports the rotation shaft, wherein the shaft support and the fixed scroll are arranged at opposite sides of the movable scroll;a housing that accommodates the rotation shaft, the fixed scroll, the movable scroll, and the shaft support;a movable member arranged in the shaft support;a rotation restriction mechanism configured to restrict rotation of the movable scroll, wherein the rotation restriction mechanism includes a plurality of pins, a plurality of recesses into which the respective pins are loosely fitted, and the movable member, and wherein the movable member includes one of the ...

Fluid Machine

The present invention relates to a fluid machine. A pump integrated expander (A) includes a pump unit () and an expansion unit (). In the pump unit (), a casing member () supports a gear pump (), a rotating shaft () and a driven crank mechanism (). In the expansion unit (), a casing including a main body (a) and a casing member () supports an expander () including a fixed scroll () and an orbiting scroll (). The pump integrated expander (A) is divided into the pump unit () and the expansion unit () by separating at the fitted portion of a tubular portion (c) on the pump unit () side and a smaller inner diameter portion (b) on the expansion unit () side and by pulling the eccentric bush () out of a drive bearing (). 1. A fluid machine comprising:a first rotating unit that rotates about a main shaft;a second rotating unit that includes a fixed scroll, an orbiting scroll and a rotation restricting mechanism; anda driven crank mechanism that is disposed between the main shaft and the orbiting scroll, converts between rotational motion of the main shaft and orbiting motion of the orbiting scroll, and is capable of changing an orbiting radius of the orbiting scroll,wherein a first casing supports the first rotating unit and supports the driven crank mechanism via the main shaft,wherein a second casing supports the second rotating unit, andwherein the first casing and the second casing are capable of being separated from each other.2. The fluid machine according to claim 1 , wherein the driven crank mechanism comprises:a crankpin that is eccentrically disposed with respect to a larger diameter portion of the main shaft; andan eccentric bush that is inserted in an oscillatable manner with respect to the crankpin and held by a bearing which is disposed on the orbiting scroll,wherein the first casing includes a bearing which supports the larger diameter portion of the main shaft.3. The fluid machine according to claim 2 ,wherein an outer periphery of a fitted portion of the ...

SCROLL COMPRESSOR

A scroll compressor includes a scroll compression element including a movable scroll, a drive shaft configured to allow the movable scroll to rotate, a boss portion, and a sliding bearing. The boss portion is connected to a back surface of the movable scroll. The boss portion is configured to rotatably support an upper end portion of the drive shaft. The upper end of the drive shaft is configured as an eccentric shaft portion. The sliding bearing is provided between the boss portion and the eccentric shaft portion. An axially central portion of the boss portion is more rigid than a connection portion of the boss portion connected to the movable scroll. The boss portion is shaped so that the central portion projects outward. 1. A scroll compressor comprising:a scroll compression element including a movable scroll;a drive shaft configured to allow the movable scroll to rotate;a boss portion connected to a back surface of the movable scroll, the boss portion being configured to rotatably support an upper end portion of the drive shaft, and the upper end of the drive shaft being configured as an eccentric shaft portion; anda sliding bearing provided between the boss portion and the eccentric shaft portion,an axially central portion of the boss portion being more rigid than a connection portion of the boss portion connected to the movable scroll,the boss portion being shaped so that the central portion projects outward.2. The scroll compressor of claim 1 , whereinthe central portion of the boss portion is more rigid than a distal end portion of the boss portion.3. The scroll compressor of claim 1 , whereinthe central portion of the boss portion is thicker than the connection portion of the boss portion.4. The scroll compressor of claim 2 , whereinthe central portion of the boss portion is thicker than the connection portion of the boss portion.5. The scroll compressor of claim 1 , wherein{'claim-text': ['an inner portion made of a first material, and the connection ...

ROTARY PISTON INTERNAL COMBUSTION ENGINE

A rotary-piston internal-combustion engine comprises a rotating block with three radially situated cylinders with pistons and an outside placed stationary case with two intake ports and two exhaust ports. Between the rotating block and the stationary case there are sealing parts and connecting rods, connected to one crank pin of a crankshaft. Between the crankshaft and the rotating block there is gearing for three times higher revolutions of the crankshaft in the opposite direction with respect to the rotating block. In the stationary case there are at least two spark plugs placed on the opposite sides. The bore of cylinders is 2 to 3.5 times higher than the stroke of pistons and all sealing parts with pressure springs that seal spaces of cylinders to the outer stationary case are placed in cavities in the stationary case. 121651672181112131733243211516589161101. A rotary-piston internal-combustion engine comprises a rotating block () with three radially placed cylinders () with pistons () and an outside placed stationary case () with two intake ports () and two exhaust ports () , while between the rotating block () and the stationary case () there are sealing parts () , and connecting rods () , () , () are connected to one crank pin () of a crankshaft () and between the crankshaft () and the rotating block () there is gearing () for three times higher revolutions of the crankshaft () in the opposite direction with respect to the rotating block () and in the stationary case () there are at least two spark plugs () placed on the opposite sides , characterized in that the cylinder bore () is 2 to 3.5 times higher than the stroke of pistons () and all sealing parts () with pressure springs () that seal space of cylinders () to the outer stationary case () are placed in cavities () in the stationary case ().21112131213111112131417. The rotary-piston internal-combustion engine defined in claim 1 , wherein all three connecting rods () claim 1 , () claim 1 , () have a ...

SCROLL COMPRESSOR

A scroll compressor includes a fixed scroll including a fixed scroll lap, and a movable scroll including a movable scroll lap. A first scroll lap is one of the fixed scroll lap and the movable scroll lap. A second scroll lap is an other of the fixed scroll lap and the movable scroll lap. A second thickness of the second scroll lap is larger than a first thickness of the first scroll lap. A first side face gap is formed between an inner line of the first scroll lap and an outer line of the second scroll lap. A second side face gap is formed between an outer line of the first scroll lap and an inner line of the second scroll lap. The second side face gap is larger than the first side face gap. 1. A scroll compressor comprising:a fixed scroll including a fixed scroll lap; anda movable scroll including a movable scroll lap,a first scroll lap being one of the fixed scroll lap and the movable scroll lap, second scroll lap being an other of the fixed scroll lap and the movable scroll lap, and a second thickness of the second scroll lap being larger than a first thickness of the first scroll lap,a first side face gap being is formed between an inner line of the first scroll lap and an outer line of the second scroll lap,a second side face gap being formed between an outer line of the first scroll lap and an inner line of the second scroll lap, andthe second side face gap being is larger than the first side face gap.2. The scroll compressor according to claim 1 , whereinthe second thickness is equal to or larger than 130% of the first thickness.3. The scroll compressor according to claim 1 , whereinthe second side face gap is equal to or larger than 110% of the first side face gap.4. The scroll compressor according to claim 3 , whereinthe second side face gap is equal to or larger than 120% of the first side face gap.5. The scroll compressor according to claim 1 , whereina height of the first scroll lap is equal to or larger than seven times the first thickness.6. The scroll ...

SCROLL COMPRESSOR

Provided is a scroll compressor including a sealed case, a fixed scroll portion fixed at an inside of the sealed case and provided with a fixed scroll vane, an orbiting scroll portion provided with an orbiting scroll vane that is coupled to the fixed scroll vane, and a rotating shaft formed to allow the orbiting scroll portion to orbit. The orbiting scroll portion is provided at a center thereof with a shaft support portion such that the orbiting scrolling portion is coupled to the rotating shaft. The shaft support portion includes a closing portion provided to cover an end portion of the rotating shaft, and slide while in contact with an inner surface of the fixed scroll portion, and a high-pressure space formed in an outer surface of the closing portion that faces the inner surface of the fixed scroll portion, and on which a discharge pressure acts. 1. A scroll compressor comprising:a sealed case;a fixed scroll portion fixed at an inside of the sealed case and provided with a fixed scroll vane;an orbiting scroll portion provided with an orbiting scroll vane that is coupled to the fixed scroll vane; anda rotating shaft formed to allow the orbiting scroll portion to orbit,wherein the orbiting scroll portion includes a shaft support portion provided at a center portion thereof and formed to allow the orbiting scrolling portion to be coupled to the rotating shaft, and a closing portion provided to cover an end portion of the rotating shaft and configured to slide while in contact with an inner surface of the fixed scroll portion, and', 'a high-pressure space formed in an outer surface of the closing portion that faces the inner surface of the fixed scroll portion and on which a discharge pressure is configured to act., 'wherein the shaft support portion includes2. The scroll compressor of claim 1 , wherein the closing portion is provided to face the inner surface of the fixed scroll portion in a direction in which the orbiting scroll portion is coupled to the fixed ...

Scroll Compressor With Unloader Assembly

A compressor may include a shell, orbiting and non-orbiting scrolls, an unloader bushing assembly and a drive shaft. The unloader bushing assembly may include a drive bushing and a spring. The drive bushing includes an outer surface engaged with the orbiting scroll and may define an opening extending from a first bushing end to a second bushing end. The spring may include a body disposed within the opening of the drive bushing and may include first and second spring ends with at least a portion of the first spring end extending laterally from the body and overlapping the first bushing end. At least a portion of the second spring end may extend laterally from a body and overlap the second bushing end to secure the spring within the drive bushing. The drive shaft may include a crank pin disposed within the opening of the drive bushing and engaging the spring. 1. A compressor comprising:an orbiting scroll;a non-orbiting scroll meshingly engaged with said orbiting scroll;a drive bushing having an outer surface engaged with said orbiting scroll and defining a longitudinally extending opening extending from a first longitudinal bushing end to a second longitudinal bushing end, said drive bushing including a ramped inner surface at least partially defining said longitudinally extending opening;a spring including a longitudinally extending body disposed within said longitudinally extending opening of said drive bushing and having first and second longitudinal spring ends, said first longitudinal spring end including a first tab extending from said body and out of said longitudinally extending opening, said second longitudinal spring end including a second tab extending from said body and out of said longitudinally extending opening, said first and second tabs retaining said spring within said drive bushing, said spring including a third tab disposed between said first and second tabs and extending outward from said body; anda drive shaft including an eccentric crank pin ...

Scroll Compressor with Unloader Assembly

A compressor may include a shell, orbiting and non-orbiting scrolls, an unloader bushing assembly and a drive shaft. The unloader bushing assembly may include a drive bushing and a spring. The drive bushing includes an outer surface engaged with the orbiting scroll and may define an opening extending from a first bushing end to a second bushing end. The spring may include a body disposed within the opening of the drive bushing and may include first and second spring ends with at least a portion of the first spring end extending laterally from the body and overlapping the first bushing end. At least a portion of the second spring end may extend laterally from a body and overlap the second bushing end to secure the spring within the drive bushing. The drive shaft may include a crank pin disposed within the opening of the drive bushing and engaging the spring.

Water Injected Scroll Air Compressor

A high reliability water injected scroll air compressor is provided with an orbiting scroll, a fixed scroll corresponding to the orbiting scroll, a motor that generates driving force for making the orbiting scroll orbit the fixed scroll, a compressing path from a suction port to a discharge port, and a portion for injecting water into the compressing path. The operation is controlled by a switching operation in which water is injected into the compressing path and then no water is injected. Corrosion, failure of activation, and concerns about wrap contact when water is injected into an air end are avoided by switching the operation with water injection and the operation without water injection so as to prevent water from remaining in the air end. 1. (canceled)2. A water injected air compressor comprising:an air end comprising a compressing member and a compressing path from a suction port to a discharge port, into which water is injected,a pressure detector that detects pressure of compressed gas discharged from the compressing path: anda driving unit that generates driving force for the compressing member; whereinoperation is controlled by switching operation in which water is injected into the compressing path and operation in which no water is injected according to detection of the predetermined pressure value by the detector; andafter the operation in which water is injected is switched to the operation in which no water is injected, the driving unit is stopped after a certain period of time lapses.3. The water injected air compressor according to claim 2 , wherein after the operation of the driving unit is initiated claim 2 , the injection of water is initiated.4. The water injected air compressor according to claim 2 , wherein when a stop instruction is issued claim 2 , the operation in which water is injected is switched to the operation in which no water is injected and the driving unit is stopped after the certain period of time lapses.5. The water injected ...

SCROLL FLUID MACHINE AND SCROLL MEMBER USED THEREIN

In a scroll compressor () provided with a fixed scroll () and an orbiting scroll (), an inclined portion is provided in which the inter-facing surface distance (L) between an end plate () and an end plate () that face each other decreases continuously from the outer peripheral side towards the inner peripheral side. The inclined portion is configured from wall inclined portions () in which the height of a wall () decreases continuously from the outer peripheral side towards the inner peripheral side, and end plate inclined portions () in which a tooth bottom surface is inclined in accordance with the incline of the wall inclined portions (). The inclined portion is provided across a range of no less than 180° around the center of the spiral. 1. A scroll fluid machine comprising:a first scroll member having a first end plate on which a spiral first wall is provided;a second scroll member having a second end plate on which a spiral second wall is provided, the second end plate being disposed to face the first end plate and the second wall meshing 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 an outer peripheral sides of the first wall and the second wall toward inner peripheral sides thereof,wherein the inclined portion is provided over a range of 180° or more around a center of the spiral.2. The scroll fluid machine according to claim 1 ,wherein at least one of the first wall and the second wall has a wall inclined portion in which a height of the wall continuously decreases from the outer peripheral side toward the inner peripheral side so as to form the inclined portion, andwherein at least one of the first end plate and the second end plate has an end plate inclined portion in which a tooth bottom surface facing a ...

ELECTRIC COMPRESSOR

The present disclosure relates to an electric compressor capable of fixing a shaft seal without a retainer for fixing the shaft seal, and includes a shaft which is rotatably coupled inside a main housing, and a shaft seal which is press-fitted between the shaft and the main housing, seals between the shaft and the main housing by an elastic structure, prevents deformation in the elastic structure with a rigid structure formed integrally with the elastic structure, and maintains the coupled position by a frictional force of the elastic structure. 1. An electric compressor comprising:a shaft which is rotatably coupled inside a main housing; anda shaft seal which is press-fitted between the shaft and the main housing, seals between the shaft and the main housing by an elastic structure, prevents deformation in the elastic structure with a rigid structure formed integrally with the elastic structure, and maintains the coupled position by a frictional force of the elastic structure.2. The electric compressor of claim 1 ,wherein a double stepped structure into which the shaft seal is inserted is formed on the inner wall of the main housing, andwherein the double stepped structure comprises:a first stepped part which protrudes in an insertion direction of the shaft seal to lock and maintain the shaft seal; anda second stepped part which is perpendicular to the first stepped part.3. The electric compressor of claim 2 ,wherein the second stepped part comprises an end which protrudes from the end of the side into which the shaft seal is inserted to the insertion direction of the shaft seal.4. The electric compressor of claim 3 ,wherein the first stepped part is formed to protrude further toward the shaft than the end.5. The electric compressor of claim 3 ,wherein the shaft seal comprises:an elastic part which is inserted between the first stepped part and the second stepped part and the shaft;a rigid part which is inserted into the elastic part; anda sealing part which is ...

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.

SCROLL COMPRESSOR

A scroll compressor is provided that may include a first compression chamber, a second compression chamber separated from the first compression chamber, and having a greater compression ratio than the first compression chamber, a first discharge port that communicates with the first compression chamber and provided with a first discharge inlet and a first discharge outlet, and a second discharge port separated from the first discharge port, communicating with the second compression chamber, and provided with a second discharge inlet and a second discharge outlet, the second discharge inlet having a larger sectional area than the first discharge inlet. This configuration may prevent a discharge delay in advance in each compression chamber, and thus, preventing a compression loss. 1. A scroll compressor , comprising:a first compression chamber;a second compression chamber separated from the first compression chamber, and having a greater compression ratio than the first compression chamber;a first discharge port that communicates with the first compression chamber and provided with a first discharge inlet and a first discharge outlet; anda second discharge port separated from the first discharge port, that communicates with the second compression chamber, and provided with a second discharge inlet and a second discharge outlet, the second discharge inlet having a larger sectional area than the first discharge inlet.2. The compressor of claim 1 , wherein a sectional area of each of the discharge outlets is larger than a sectional of each of the discharge inlets.3. The compressor of claim 2 , wherein the first discharge inlet and the first discharge outlet have different shapes from each other.4. The compressor of claim 3 , wherein a portion of the first discharge outlet is stepped between the first discharge inlet and the first discharge outlet claim 3 , to protrude further outward than an inner circumferential surface of the first discharge inlet in a radial direction ...

SCROLL COMPRESSOR

A scroll compressor is provided that may include a first compression chamber, a second compression chamber separated from the first compression chamber and having a greater compression ratio than the first compression chamber, a first discharge port that communicates with the first compression chamber and provided with a first discharge inlet and a first discharge outlet, and a second discharge port separated from the first discharge port, that communicates with the second compression chamber, and provided with a second discharge inlet and a second discharge outlet, the second discharge inlet having a larger sectional area than the first discharge inlet. The first discharge inlet and the first discharge outlet may have a same cross section, and the second discharge inlet and the second discharge outlet may have a same cross section. Accordingly, a discharge delay in each compression chamber may be prevented in advanced, and thus, compression loss may be suppressed. 1. A scroll compressor , comprising:a first compression chamber;a second compression chamber separated from the first compression chamber, and having a greater compression ratio than the first compression chamber;a first discharge port that communicates with the first compression chamber and provided with a first discharge inlet and a first discharge outlet; anda second discharge port separated from the first discharge port, that communicates with the second compression chamber, and provided with a second discharge inlet and a second discharge outlet, the second discharge inlet having a larger sectional area than the first discharge inlet, wherein the first discharge inlet and the first discharge outlet have a same cross section, and the second discharge inlet and the second discharge outlet have a same cross section.2. The compressor of claim 1 , wherein the discharge inlet and the discharge outlet of at least one of the first discharge port or the second discharge port have a same sectional area.3. The ...

SCROLL COMPRESSOR

A scroll compressor includes a fixed scroll including a fixed mirror-like surface and a fixed wrap that is extended from the fixed mirror-like surface, formed in a hybrid curve, and includes a thick portion thicker than other portions; an orbiting scroll including an orbiting mirror-like surface and an orbiting wrap extended from the orbiting mirror-like surface and formed in a hybrid curve; and a rotating shaft configured to rotate the orbiting scroll, wherein the orbiting scroll revolves relative to the fixed scroll. A center of a curve of a center portion of the fixed wrap is located at a position offset by a predetermined distance in a direction of reducing a thickness of the thick portion of the fixed wrap from a center of the fixed mirror-like surface, and a center of a curve of a center portion of the orbiting wrap is offset to correspond to the fixed wrap. 1. A scroll compressor comprising:a fixed scroll including a fixed mirror-like surface and a fixed wrap that is extended from the fixed mirror-like surface, is formed in a hybrid curve, and includes a thick portion that is thicker than other portions;an orbiting scroll including an orbiting mirror-like surface and an orbiting wrap that is extended from the orbiting mirror-like surface and is formed in a hybrid curve; anda rotating shaft configured to rotate the orbiting scroll, wherein the orbiting scroll revolves relative to the fixed scroll,wherein a center of a curve of a center portion of the fixed wrap is located at a position that is offset by a predetermined distance in a direction of reducing a thickness of the thick portion of the fixed wrap from a center of the fixed mirror-like surface, andwherein a center of a curve of a center portion of the orbiting wrap is offset to correspond to the fixed wrap.2. The scroll compressor of claim 1 , whereinthe center of the curve of the center portion of the fixed wrap is offset from the center of the fixed mirror-like surface by ½ or less of an eccentric ...

SCROLL COMPRESSOR AND METHOD FOR PRODUCING SAME

A scroll compressor includes a drive bush () disposed in one end portion in an axial direction of a main shaft () rotated around an axis, and eccentrically rotated, a pair of angular bearings ( and ) arranged back-to-back, and respectively clearance-fitted to an outside of the drive bush (), a compression unit () that has a boss portion (C) which protrudes from an end plate (A) of a movable scroll and in which the pair of angular bearings ( and ) are interference-fitted to an inner peripheral surface of the boss portion, and a preload application unit () that applies a preload to the pair of angular bearings ( and ) in a direction in which the pair of angular bearings ( and ) moves close to each other. 1. A scroll compressor comprising:a main shaft rotated around an axis;a drive bush disposed in one end portion in an axial direction of the main shaft, and eccentrically rotated in accordance with rotation of the main shaft;a pair of angular bearings arranged back-to-back, and respectively clearance-fitted to an outside of the drive bush;a compression unit that has a fixed scroll and a movable scroll, and that has a boss portion which protrudes from an end plate of the movable scroll and in which the pair of angular bearings are interference-fitted to an inner peripheral surface of the boss portion; anda preload application unit that is configured to apply a preload to the pair of angular bearings in a direction in which the pair of angular bearings moves close to each other.2. The scroll compressor according to claim 1 ,wherein the preload application unit has a preload metal fitting which is clearance-fitted to an inside of one of the pair of angular bearings and which has a first through-hole at a position overlapping the drive bush, and a preload bolt which is fitted into the first through-hole, andwherein a side wall of the drive bush has a protruding portion which supports the other of the pair of angular bearings.3. The scroll compressor according to claim 2 , ...

SCROLL COMPRESSOR

A compression mechanism of a scroll compressor has a back-pressure chamber defined on a back face of an end plate of a movable scroll. The compression mechanism has an annular space defined at an outer periphery of the end plate of the movable scroll. The movable scroll has a movable-side passage through which a compression chamber intermittently communicates with the back-pressure chamber in accordance with eccentric rotation of the movable scroll. The end plate of the movable scroll has a communication space through which the movable-side passage communicates with the annular space. The communication space includes first and second communication portions located forward and rearward of the movable-side passage in a direction of eccentric rotation, respectively. A first circumferential width of a first opening in the first communication portion is larger than a second circumferential width of a second opening in the second communication portion. 1. A scroll compressor comprising:a compression mechanism including a movable scroll and a fixed scroll and a compression chamber defined between the movable scroll and the fixed scroll,the compression mechanism having a back-pressure chamber defined on a back face of an end plate of the movable scroll,the compression mechanism having an annular space defined at an outer periphery of the end plate of the movable scroll,the movable scroll having a movable-side passage through which the compression chamber intermittently communicates with the back-pressure chamber in accordance with eccentric rotation of the movable scroll, a first communication portion located forward of the movable-side passage in a direction of eccentric rotation, and', 'a second communication portion located rearward of the movable-side passage in the direction of eccentric rotation, and, 'the end plate of the movable scroll having a communication space through which the movable-side passage communicates with the annular space, the communication space ...

SCROLL COMPRESSOR

A scroll compressor is provided, including: a compression mechanism, a driving mechanism, a suction fitting and a lubrication system. The compression mechanism is adapted to compress working fluid and includes a movable scroll component, a fixed scroll component and a suction window, the working fluid flows into the compression mechanism via the suction window. The driving mechanism includes a driving shaft and is adapted to drive the compression mechanism. The working fluid flows into the scroll compressor via the suction fitting and then flow into the compression mechanism. The lubrication system includes a lubricant source and a compression mechanism oil supply device adapted to supply the lubricant to the compression mechanism from the lubricant source. The compression mechanism oil supply device has an oil supply passage and an outflow opening of the oil supply passage is located between an opening of the suction fitting and the suction window. 1. A scroll compressor , comprising:a compression mechanism adapted to compress a working fluid and comprising an orbiting scroll set, a non-orbiting scroll set and a suction window, the working fluid flowing into the compression mechanism via the suction window;a drive mechanism comprising a drive shaft and adapted to drive the compression mechanism;a suction fitting via which the working fluid flows into the scroll compressor and further flows to the compression mechanism; anda lubrication system comprising a lubricant source and a compression mechanism oil supply device adapted to supply a lubricant from the lubricant source to the compression mechanism,wherein the compression mechanism oil supply device has an oil supply passage, and an outflow opening of the oil supply passage is located between an opening of the suction fitting and the suction window.2. The scroll compressor according to claim 1 , wherein the outflow opening is located on a working fluid flow path extending from the opening of the suction fitting ...

HORIZONTAL TYPE SCROLL COMPRESSOR

A horizontal type scroll compressor includes a motor housing with a driving motor therein, a main scroll coupled to one side of the motor housing and having a fixed wrap for forming compression chambers, an orbiting scroll having an orbiting wrap and coupled to a crankshaft inserted through the main scroll, the orbiting scroll forming a first compression chamber and a second compression chamber on an outer surface and an inner surface of the orbiting wrap while performing an orbiting motion, and a front housing hermetically coupled to the main scroll. With the configuration, the number of components and assembly parts may be reduced, resulting in reduction of fabricating costs. Also, an inclination of the orbiting scroll can be prevented as the crankshaft is inserted through the fixed wrap and the orbiting wrap. 1. A horizontal type scroll compressor comprising:a motor housing having an inner space for installation of a driving motor therein;a main scroll coupled to one side of the motor housing to seal the inner space of the motor housing, and having a fixed wrap for forming compression chambers;an orbiting scroll having an orbiting wrap engaged with the fixed wrap of the main scroll and coupled to a crankshaft inserted through the main scroll, the orbiting scroll forming a first compression chamber and a second compression chamber on an outer surface and an inner surface of the orbiting wrap while performing an orbiting motion; anda front housing hermetically coupled to the main scroll, the front housing accommodating the orbiting scroll.2. The compressor of claim 1 , wherein an inlet is formed on an outer circumferential surface of the main scroll claim 1 , and a discharge port is formed on one side surface of the main scroll facing the inner space of the motor housing.3. The compressor of claim 2 , wherein a bearing for supporting the crankshaft is disposed on one side surface of the main scroll claim 2 , andwherein the bearing is installed on a bearing guide ...

SCROLL COMPRESSOR

A posture control unit (contact portion ) that controls a posture of a balance weight-equipped slider so that a slider portion of the balance weight-equipped slider maintains the posture parallel to an orbiting bearing is provided at a position corresponding to a central portion in an axial direction of the orbiting bearing between an eccentric direction-side side surface of an eccentric shaft portion of a rotary shaft and an inner wall surface of a slide hole facing the side surface. 1: A scroll compressor comprising:a fixed scroll provided in a container;an orbiting scroll configured to orbit relative to the fixed scroll;a rotary shaft configured to transmit rotational drive force to the orbiting scroll;an eccentric shaft portion provided on one end side of the rotary shaft to be eccentric to the rotary shaft;a balance weight-equipped slider integrated of a slider portion having a slide hole and a balance weight portion, in a plane perpendicular to an axis of the rotary shaft, movable along the slide hole relative to the eccentric shaft portion inserted in the slide hole, and having centrifugal force set to be greater than centrifugal force of the orbiting scroll;an orbiting bearing provided to the orbiting scroll and rotatably supporting the slider portion of the balance weight-equipped slider, anda convex portion having a curved surface with one vertex, provided to one of an eccentric direction-side side surface of the eccentric shaft portion and an inner wall surface of the slide hole facing the side surface, configured to act as a posture control unit provided at a position corresponding to a central portion in an axial direction of the orbiting bearing between the eccentric direction-side side surface of the eccentric shaft portion and the inner wall surface of the slide hole facing the side surface, and configured to control a posture of the balance weight-equipped slider so that the slider portion of the balance weight-equipped slider maintains the posture ...

Compressor including laser-hardened bearing surfaces

This disclosure is directed to compressors with hardened bearing surfaces, particularly laser-hardened bearing surfaces. Laser hardening can be used to precisely harden selected areas of the bearing surfaces of the compressor components. By hardening those selected areas, wear resistance can be improved and sliding wear can be reduced. This can result in thrust plates having different material structures configured to contact one another, such as one having a primarily pearlitic microstructure with the opposing thrust plate having a primarily martensitic microstructure. This can reduce adhesive wear by providing dissimilarity on the wearing surfaces.

MOTOR DRIVEN COMPRESSOR APPARATUS INCLUDING SWING PIN

A motor driven compressor apparatus includes a rotary shaft rotatably supported in a housing, an eccentric bushing eccentrically coupled to the rotary shaft, and a swing pin configured to connect the eccentric bushing and the rotary shaft with each other, wherein the rotary shaft is provided with a flow path configured to pass through the center of a cross-section in the longitudinal direction and, in one direction at which the eccentric bushing is disposed, a first pin insertion hole which communicates with the flow path and into which the swing pin is inserted, the eccentric bushing is provided with a second pin insertion hole into which the swing pin is inserted in the other direction at which the rotary shaft is disposed, and refrigerant leaks between the swing pin and the first pin insertion hole. 1. A motor driven compressor apparatus comprising:a rotary shaft rotatably supported in a housing;an eccentric bushing eccentrically coupled to the rotary shaft; anda swing pin configured to connect the eccentric bushing and the rotary shaft with each other, wherein the rotary shaft is provided with a flow path configured to pass through a center of a cross-section in the longitudinal direction and, in one direction in which the eccentric bushing is disposed, a first pin insertion hole that communicates with the flow path and into which the swing pin is inserted,wherein the eccentric bushing is provided with a second pin insertion hole into which the swing pin is inserted in the other direction in which the rotary shaft is disposed, andwherein refrigerant is configured to leak between the swing pin and the first pin insertion hole.2. The motor driven compressor apparatus of claim 1 , further comprising:a center plate fixed to an inside of the housing;an orbiting scroll disposed in one direction of the eccentric bushing and s configured to orbit by the rotary shaft; anda back pressure chamber surrounded by the center plate between the center plate and the orbiting ...

MOTOR-OPERATED COMPRESSOR

A motor-operated compressor includes a compression unit including a compression chamber formed by a plurality of scrolls engaged with each other. The compressor includes a rotation shaft having one end coupled to one of the scrolls and a rotor coupled with another end of the rotation shaft. The compressor includes a stator radially separated from the rotor by a predetermined gap. The compressor includes a casing having a motor chamber. The stator is inserted in the motor chamber and divides the motor chamber into a first space and a second space. The casing includes an inlet port coupled to the first space to guide a refrigerant toward the motor chamber. The casing also includes a suction guide passage coupled to the second space to guide the refrigerant sucked through the inlet port toward the compression unit. A communication passage portion in the rotation shaft communicates the first and second spaces. 1. A motor-operated compressor , comprising:a compression unit including a compression chamber formed by a plurality of scrolls engaged with each other;a rotation shaft having one end coupled to one of the plurality of scrolls;a rotor coupled with another end of the rotation shaft;a stator provided at an outer circumferential surface of the rotor and separated from the rotor by a predetermined gap; a motor chamber, the stator being inserted into the motor chamber and dividing the motor chamber into a first space and a second space;', 'an inlet port fluidly coupled with the first space to guide a refrigerant toward the motor chamber; and', 'a suction guide passage formed in the second space to guide the refrigerant sucked through the inlet port toward the compression unit; and, 'a casing, includinga communication passage portion in the rotation shaft configured to communicate the first space and the second space.2. The compressor of claim 1 , wherein the communication passage portion comprises:a first communication hole formed within the rotation shaft in an axial ...

SCROLL PUMP AND SCROLL PUMP ANTI-ROTATION DEVICE

A scroll pump anti-rotation device for resisting relative rotational movement between two scrolls and a scroll pump comprising such a device is disclosed. The anti-rotation device comprises: an elongate member forming an inner ring; an elongate member forming an outer ring surrounding the inner ring; a plurality of connecting members extending between adjacent elongate members; and at least one fixing point for fixing the outer ring to the scroll pump in a fixed relation to one of the scrolls and at least one further fixing point for fixing the inner ring to the scroll pump in a fixed relation to the other of the scrolls. 1. A scroll pump anti-rotation device configured to resist relative rotational movement between two scrolls , the anti-rotation device comprising:a first elongate member forming an inner ring;a second elongate member forming an outer ring surrounding the inner ring;a plurality of connecting members extending between adjacent first and second elongate members; andat least one fixing point configured to fix the outer ring to the scroll pump in a fixed relation to one of the two scrolls and at least one further fixing point for fixing the inner ring to the scroll pump in a fixed relation to the other of the two scrolls.2. The scroll pump anti-rotation device according to claim 1 , further comprising at least one further elongate member extending around the inner ring and located between the inner and outer rings.3. The scroll pump anti-rotation device according to claim 1 , further comprising a plurality of further elongate members each extending around the inner ring and located at different positions between the inner and outer rings.4. The scroll pump anti-rotation device according to claim 1 , wherein at least one of the first or second elongate members has a circular ring form.5. The scroll pump anti-rotation device according to claim 1 , wherein at least one of the first or second elongate members has a polygonal ring form.6. The scroll pump ...

Scroll Type Fluid Machine

A scroll type fluid machine, for improving a dimensional accuracy with easy working, includes a fixed scroll, an orbiting scroll arranged so as to oppose to the fixed scroll and executing an orbiting motion, a driving shaft driving the orbiting scroll, an eccentric shaft decentered from the driving shaft and connected to the orbiting scroll, and an eccentric bush connecting the driving shaft and the eccentric shaft to each other, in which the eccentric bush includes a main hole into which the driving shaft is fitted and an eccentric hole into which the eccentric shaft is fitted, and the eccentric hole is decentered with respect to the main hole. 1. A scroll type fluid machine , comprising:a fixed scroll;an orbiting scroll arranged so as to oppose to the fixed scroll and executing an orbiting motion;a driving shaft driving the orbiting scroll;an eccentric shaft decentered from the driving shaft and connected to the orbiting scroll; andan eccentric bush connecting the driving shaft and the eccentric shaft to each other,wherein the eccentric bush has a main hole into which the driving shaft is fitted and an eccentric hole into which the eccentric shaft is fitted, and the eccentric hole is decentered with respect to the main hole.2. The scroll type fluid machine according to claim 1 , wherein the main hole and the eccentric hole penetrate the eccentric bush.3. The scroll type fluid machine according to claim 1 , wherein the main hole and the eccentric hole are formed at a position where one thereof does not protrude from the other thereof outward in a radial direction as viewed in a direction where the driving shaft extends.4. The scroll type fluid machine according to claim 1 , wherein claim 1 , when a diameter of one of the main hole and the eccentric hole is made A claim 1 , a diameter of the other is made B claim 1 , and an eccentricity amount of the orbiting scroll is made ε claim 1 , (A/2-ε)>B/2 is achieved.5. The scroll type fluid machine according to claim 1 , ...

Compressor Having Damped Scroll

A compressor may include a shell assembly, orbiting and non-orbiting scrolls, a bearing housing, a bushing, a damper, and a fastener. The bearing housing includes a first aperture. The bushing may include an axial end abutting the bearing housing. The bushing may extend through a second aperture of the non-orbiting scroll. The bushing may include a third aperture. The damper may be received in a pocket that may be defined by and disposed radially between an outer diametrical surface of the bushing and an inner diametrical surface of the non-orbiting scroll. The damper may be at least partially disposed within the second aperture and may encircle the second portion of the bushing. The fastener may include a shaft portion and a flange portion. The shaft portion may extend through the third aperture and into the first aperture. The flange portion may contact a first axial end of the damper.

SCROLL COMPRESSOR HAVING SEALED-OIL INTERCEPTION STRUCTURE

A scroll compressor having a sealed-oil interception structure, comprising: a partition plate unit which has an orifice, and a first sealing surface located at a bottom side of the partition plate unit and surrounding the orifice; a sealing assembly which is arranged below the partition plate unit and comprises a second sealing surface configured to surround a center hole of the sealing assembly, wherein the second sealing surface abuts against the first sealing surface to form a seal that separates a high-pressure side from a low-pressure side; and an oil interception device provided at the orifice of the partition plate unit. The present compressor may re-introduce a part of lubricating oil to an inner part of a scroll and/or to a low-pressure oil pool side, thereby improving the compression performance and operating stability of the compressor, and reducing the oil circulation rate.

FLUID COMPRESSOR

A fluid compressor includes a closed container having an inlet, a compression mechanism including a compression chamber in which fluid flowing into the closed container through the inlet is compressed, a discharge port through which the fluid compressed in the compression chamber is allowed to flow, a discharge valve opening and closing the discharge port, and a valve retainer limiting an amount of lift of the discharge valve. The discharge valve includes a curved portion whose shape is defined by one or more curvatures. When the discharge port is closed by the discharge valve, the valve retainer and the discharge valve are spaced apart from each other. 114-. (canceled)15. A fluid compressor comprising:a closed container having an inlet;a compression mechanism including a compression chamber in which fluid flowing into the closed container through the inlet is compressed;a discharge port through which the fluid compressed in the compression chamber is allowed to flow;a discharge valve opening and closing the discharge port; anda valve retainer limiting an amount of lift of the discharge valve,the discharge valve includinga curved portion having an annular shape defined by one or more curvatures, anda tongue portion fixed to the compression mechanism and projecting inward from an inner periphery of the curved portion,a part of the curved portion provided at a position toward which the tongue portion projects being positioned above the discharge port,when the discharge port is closed by the discharge valve, the valve retainer and the discharge valve being spaced apart from each other.16. The fluid compressor of claim 15 , wherein the curved portion has a U shape.17. The fluid compressor of claim 15 , wherein the curved portion has a helical shape.18. The fluid compressor of claim 15 , further comprising:a fixed scroll including a first helical portion; andan orbiting scroll including a second helical portion whose whirling direction is opposite to a whirling direction ...

SCROLL COMPRESSOR

A scroll compressor of the present invention includes a partition plate , a fixed scroll , an orbiting scroll , a rotation-restraining member and a main bearing . An inner wall of a fixed spiral lap of the fixed scroll is formed up to a location close to an ending-end of an orbiting spiral lap of the orbiting scroll , thereby differentiating, from each other, a containment capacity of one (A) of compression chambers and a containment capacity of the other compression chamber B, the fixed scroll can move in an axial direction of the fixed scroll between the partition plate and a main bearing , and high pressure is applied to a discharge space H formed between the partition plate and the fixed scroll . According to this, the fixed scroll can be pressed against the orbiting scroll 1. A 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;a 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, andthe fixed scroll can move in an axial direction of the fixed scroll between the partition plate and the main bearing, whereinan inner wall of a fixed spiral lap of the fixed scroll is formed up to a location close to an ending-end of an orbiting spiral lap of the orbiting scroll, thereby differentiating, from each other, a containment capacity of one of compression chambers formed by the inner wall of the fixed spiral lap and an outer wall of the orbiting spiral lap, and a containment capacity of the other compression chamber ...

SCROLL COMPRESSOR

A scroll compressor includes an orbiting scroll including an end plate and a spiral element on the end plate, a fixed scroll including an end plate and a spiral element on the end plate, and an Oldham ring including a support. The scroll compressor satisfies a relation of δ1>δ2, where δ1 denotes each of the axial length of a gap between the tip of the spiral element of the orbiting scroll and the end plate of the fixed scroll and a gap between the tip of the spiral element of the fixed scroll and the end plate of the orbiting scroll, and δ2 denotes the axial length of a gap between the end plate of the orbiting scroll and the support of the Oldham ring. 1. A scroll compressor , comprising:a fixed scroll including an end plate and a spiral element on the end plate;an orbiting scroll including an end plate and a spiral element on the end plate of the orbiting scroll, the spiral element of the orbiting scroll engaging with the spiral element of the fixed scroll to define a compression chamber;a crankshaft configured to drive the orbiting scroll;a frame supporting the orbiting scroll across the orbiting scroll from the fixed scroll; andan Oldham ring disposed between the end plate of the orbiting scroll and the frame, the Oldham ring being configured to prevent the orbiting scroll from rotating to allow the orbiting scroll to orbit against the fixed scroll,the Oldham ring including a ring portion that is annular, a surface of the ring portion facing the end plate of the orbiting scroll including a support to contact the orbiting scroll when the orbiting scroll tilts during an orbiting motion of the orbiting scroll,{'b': 1', '2', '1', '2, 'the scroll compressor satisfying a relation of δ>δ, where δ denotes an axial length of each of a gap between a tip of the spiral element of the orbiting scroll and the end plate of the fixed scroll and a gap between a tip of the spiral element of the fixed scroll and the end plate of the orbiting scroll, and δ denotes an axial length ...

SCROLL COMPRESSOR

In a scroll compressor, breakage of a spiral end portion of a spiral wall () of a scrolls is prevented. 1. A scroll compressor comprising:a fixed scroll including an end plate and a spiral wall extending upright from the end plate;an orbiting scroll arranged so as to oppose the fixed scroll and including an end plate and a spiral wall extending upright from the end plate; anda drive shaft configured to transmit a rotational power to the orbiting scroll, the orbiting scroll making an orbital motion and compressing a compressed fluid by moving a compression chamber formed by the fixed scroll and the orbiting scroll toward a center side while reducing a volume thereof, whereinthe spiral wall of at least one of the fixed scroll and the orbiting scroll is provided with an extending portion which does not come into contact with the spiral wall of the counterpart from a spiral end portion at a terminal end of a wall surface that forms the compression chamber.2. The scroll compressor according to claim 1 , wherein the extending portion forms a non-contact state with respect to the spiral wall of the counterpart by retracting an inner wall surface thereof from the spiral wall of the counterpart opposing thereto.3. The scroll compressor according to claim 1 , wherein the extending portion forms a non-contact state with respect to the spiral wall of the counterpart by retracting an outer wall surface thereof from the spiral wall of the counterpart opposing thereto.4. The scroll compressor according to claim 1 , wherein a height of the extending portion from the end plate is set to be lower than a height of the spiral wall.5. The scroll compressor according to claim 4 , wherein a height of a transition part from the spiral end portion to the extending portion is gradually reduced.6. The scroll compressor according to claim 4 , wherein a suction port configured to introduce the compressed fluid to the compression chamber is provided on a peripheral wall of the fixed scroll ...

SCROLL COMPRESSOR

This scroll compressor () includes a first fixed scroll (), an orbiting scroll arrangement (), a drive shaft () adapted for driving the orbiting scroll arrangement () in an orbital movement, a driving unit coupled to the drive shaft () and arranged for driving in rotation the drive shaft () about a rotation axis, and guide elements for guiding in rotation the drive shaft (), the guide elements comprising at least a first guide bearing () and a second guide bearing () arranged to respectively guide a first portion () and a second portion () of the drive shaft (). The drive shaft () extends across the orbiting scroll arrangement () such that the first and second portions () of the drive shaft () are located on either side of the orbiting scroll arrangement (), the first and second guide bearings () being located on either side of the orbiting scroll arrangement (). 1. A scroll compressor including:a first fixed scroll comprising a first fixed spiral wrap,an orbiting scroll arrangement including at least a first orbiting spiral wrap, the first fixed spiral wrap and the first orbiting spiral wrap forming a plurality of first compression chambers,a drive shaft extending across the orbiting scroll arrangement, the drive shaft including a first portion and a second portion located on either side of the orbiting scroll arrangement, and a driving portion located between the first and second portions and adapted for driving the orbiting scroll arrangement in an orbital movement,a driving unit coupled to the drive shaft and arranged for driving in rotation the drive shaft about a rotation axis, andguide elements for guiding in rotation the drive shaft, the guide elements comprising at least a first guide bearing and a second guide bearing located on either side of the orbiting scroll arrangement and arranged to respectively guide the first and second portions of the drive shaft,wherein the drive shaft comprises a first end portion and a second end portion opposite to the first ...

Motor operated compressor

A motor operated compressor includes: a main housing having a motor chamber; a frame provided on one side of the motor chamber and coupled to the main housing; a fixed scroll coupled to one side surface of the frame; an orbiting scroll provided to perform an orbiting movement between the frame and the fixed scroll, and form a compression chamber along with the fixed scroll; a sealing member provided on one side surface of the orbiting scroll to form a back pressure chamber between the orbiting scroll and the frame; and a plate provided between the frame and the fixed scroll and between the frame and the orbiting scroll, where the plate includes a sealing portion at least part of which is positioned between the frame and the fixed scroll; and a sliding portion extended from the sealing portion and positioned between the frame and the orbiting scroll.

COMPRESSOR WITH UNLOADER COUNTERWEIGHT ASSEMBLY

A compressor is provided and may include a shell, an orbiting scroll, a driveshaft and an unloader counterweight. The orbiting scroll may be disposed within the shell and include a boss portion. The driveshaft may include an eccentric pin and rotate about a longitudinal axis. The unloader counterweight assembly may include a first, a second end, and a longitudinal opening extending therebetween. The eccentric pin of the driveshaft may be disposed within the longitudinal opening at the first end of the unloader counterweight assembly. The boss portion of the orbiting scroll may be disposed within the longitudinal opening at the second end of the unloader counterweight assembly 1. A compressor comprising:a shell;an orbiting scroll disposed within said shell and including a boss portion;a driveshaft having an eccentric pin extending from a first end thereof, said driveshaft operable to rotate about a longitudinal axis; andan unloader counterweight assembly having a first end, a second end, and a longitudinal opening extending from said first end to said second end, wherein said eccentric pin is disposed within said longitudinal opening at said first end, and the boss portion of said orbiting scroll is disposed within said longitudinal opening at said second end.2. The compressor of claim 1 , wherein said unloader counterweight assembly includes a bearing assembly disposed within said longitudinal opening claim 1 , and wherein said boss portion of said orbiting scroll is further disposed within said bearing assembly.3. The compressor of claim 1 , wherein said eccentric pin includes a substantially D-shaped cross-section extending from a first end of said driveshaft claim 1 , and said longitudinal opening includes a substantially D-shaped portion claim 1 , and wherein the D-shaped cross-section of said eccentric pin is disposed within the D-shaped portion of said longitudinal opening.4. The compressor of claim 3 , wherein said unloader counterweight assembly includes a ...

OLDHAM COUPLING

Oldham couplings are disclosed, for example, for use in electric camshaft adjusters. The Oldham coupling may include a first outer connecting disk and a second outer connecting disk having axes of rotation extending parallel to each other and a central connecting disk including one or more through-bores. One or more connecting elements may couple the first outer connecting disk to the central connecting disk via the through-bore(s). A sleeve may be arranged in the through-bore(s) such that the connecting element(s) contacts the sleeve and wear of the central connecting disk is reduced. For example, the sleeve may prevent direct contact of the connecting element(s) with the central connecting disk, such as by a spacer or flange. The sleeve may be made of metal, while the central connecting disk may be plastic or metal. 1. An Oldham coupling for compensating an axial offset between two parallel shafts , comprising:two outer connecting disks having axes of rotation extending parallel to each other and a central connecting disk;one of the two outer connecting disks being coupled to the central connecting disk by a plurality of connecting elements;each of the connecting elements being movably guided in the central connecting disk in a through-bore; anda sleeve arranged in each of the through-bores as a wear insert.2. The Oldham coupling as claimed in claim 1 , wherein the sleeve has a through-slot.3. The Oldham coupling as claimed in claim 1 , wherein the sleeve has a spacer at one end.4. The Oldham coupling as claimed in claim 1 , wherein the sleeve has a flange at one end.5. The Oldham coupling as claimed in claim 1 , wherein the sleeve is composed of metal.6. The Oldham coupling as claimed in claim 1 , wherein the sleeve is pressed or fitted into the through-bore of the central connecting disk.7. The Oldham coupling as claimed in claim 1 , wherein the central connecting disk is composed of plastic.8. The Oldham coupling as claimed in claim 1 , wherein the central ...

SCROLL COMPRESSOR

[Problem] A scroll compressor is provided which effectively suppresses the occurrence of localized contact caused by deformation of a fixed scroll or a movable scroll due to the influence of a compressive reaction force or thermal expansion and shortens a break-in time. [Solution] Laps and of a fixed scroll and a movable scroll are constituted to have a plurality of step portions between a winding end portion at an outermost periphery and a winding start portion at an innermost periphery and decrease stepwise in height toward the winding start portion from the winding end portion. The position and height of each step portion are set so that when the spiral laps and are expanded on a predetermined plane, a base point of each step portion is placed on a predetermined arc drawn on the plane. 1. A scroll compressor comprising:a compression mechanism including a fixed scroll and a movable scroll respectively formed on surfaces of mirror plates with spiral laps facing each other,wherein the movable scroll is revolved and turned with respect to the fixed scroll to move a compression chamber formed between the laps of both scrolls from the outside to the inside while reducing the compression chamber to thereby compress a working fluid,wherein the laps of the fixed scroll and the movable scroll are configured to have a plurality of step portions between a winding end portion at an outermost periphery and a winding start portion at an innermost periphery and decrease stepwise in height toward the winding start portion from the winding end portion, andwherein the position and height of each of the step portions are set so that a base point of each step portion is placed on a predetermined arc drawn on a predetermined plane upon expanding each of the spiral laps on the predetermined plane.2. The scroll compressor according to claim 1 , wherein each of the step portions has a concentric arc shape.3. The scroll compressor according to claim 2 , wherein each of the step portions ...

SCROLL COMPRESSOR

A scroll compressor includes fixed and movable scrolls forming a compression chamber, a back pressure chamber, and outer and inner oil supply mechanisms that supply oil to outer and inner chambers of the compression chamber. The inner oil supply mechanism includes an oil supply portion formed in a sliding surface of the fixed scroll to communicate with a suction region of the compression chamber and a communication port passing through the sliding surface of the movable scroll to communicate with the back pressure chamber. The communication port communicates with the oil supply portion within a predetermined period in which a center position of a suction-side end of the wrap of the movable scroll in a thickness direction is located radially outward of a center position of a space between adjacent turns of a wrap of the fixed scroll, during one rotation of the movable scroll. 1. A scroll compressor comprising:a fixed scroll;a movable scroll forming a compression chamber with the fixed scroll;a back pressure chamber allowing an intermediate pressure between a suction pressure and a discharge pressure of the compression chamber to act on a surface of the movable scroll opposite to a sliding surface of the movable scroll;an outer oil supply mechanism configured to supply oil to an outer chamber of the compression chamber located radially outward of a wrap of the movable scroll; andan inner oil supply mechanism configured to supply oil to an inner chamber of the compression chamber located radially inward of the wrap of the movable scroll, the inner oil supply mechanism including an oil supply portion and a communication port,the oil supply portion being formed in a sliding surface of the fixed scroll to communicate with a suction region of the compression chamber,the communication port passing through the sliding surface of the movable scroll to communicate with the back pressure chamber, andthe communication port communicating with the oil supply portion within a ...

SCROLL COMPRESSOR

A scroll compressor includes a partition plate a refrigerant intake tube and a straightening plate and a shielding plate is provided at a height position between the partition plate and an intake portion of a fixed scroll According to this, refrigerant sucked from the refrigerant intake tube flows toward the partition plate by the straightening plate the refrigerant which flows toward the partition plate collides against the shielding plate before it is sucked by a compression mechanism and therefore, it is possible to prevent refrigerant from coming into contact with the partition plate having high temperature. According to this, the refrigerant is not heated by the partition plate volumetric efficiency is enhanced and high efficiency of the compressor can be realized. 1. A scroll compressor comprising:a partition plate for dividing an interior of an airtight 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 a compression chamber;a rotation-suppressing 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-suppressing member and the main bearing are placed in the low-pressure space, andthe fixed scroll and the orbiting scroll are placed between the partition plate and the main bearing, whereina refrigerant intake tube for making the low-pressure space suck refrigerant is provided in the airtight container, andthe scroll compressor includes a straightening plate against which refrigerant introduced from the refrigerant intake tube collides, and a shielding plate provided at a height position between the partition plate and an intake portion of the fixed scroll.2. The scroll compressor according to claim 1 , wherein the shielding plate is provided on an inner wall of the airtight container.3. The scroll compressor ...

Scroll compressor and vehicle having the same

Scroll compressor and a vehicle having the same. The scroll compressor includes: a support and an orbiting scroll assembly, the orbiting scroll assembly being movably provided on the support; a partition structure, provided between the support and the orbiting scroll assembly, a first bearing chamber being formed between the partition structure and the orbiting scroll assembly, a second bearing chamber being formed between the partition structure and the support, the orbiting scroll assembly being provided with a first through hole in communication with the first bearing chamber, and the support being provided with a second through hole in communication with the second bearing chamber; and a first crankshaft), passing through the partition structure, a first communication passage through which the first bearing chamber is in communication with the second bearing chamber is formed between the first crankshaft and the partition structure.

Scroll compressor

A compression mechanism can include a first scroll member, a second scroll member, and an Oldham coupling. The first scroll member can include a base plate. The second scroll member can meshingly engaged with the first scroll member, and include a first radially extending slot. The Oldham coupling can include a ring portion disposed about the base plate and a first radially extending key portion disposed in the first radially extending slot. The ring portion and the key portion can include a pair of upper surfaces and a pair of lower surfaces. At least one pair of upper surfaces or lower surfaces can be substantially coplanar.

RADIALLY COMPLIANT SCROLL COMPRESSOR

A compressor may include a compression mechanism, a driveshaft, and a lever. The compression mechanism may include orbiting and non-orbiting scroll members meshingly engaging each other. The driveshaft may include an eccentric crank pin engaging the orbiting scroll member such that rotation of the driveshaft about a first axis causes orbital motion of the orbiting scroll relative to the non-orbiting scroll. The lever may be mounted for rotation with the driveshaft about the first axis and may be rotatable relative to the driveshaft about a second axis. 1. A compressor comprising:a compression mechanism including orbiting and non-orbiting scroll members meshingly engaging each other;a driveshaft having an eccentric crank pin engaging said orbiting scroll member such that rotation of said driveshaft about a first axis causes orbital motion of said orbiting scroll relative to said non-orbiting scroll; anda lever mounted for rotation with said driveshaft about said first axis and rotatable relative to said driveshaft about a second axis.2. The compressor of claim 1 , wherein at least a portion of said lever is disposed between a hub of said orbiting scroll and said eccentric pin in a radial direction.3. The compressor of claim 1 , wherein at least a portion of said lever is disposed between an unloader bushing and said eccentric crank pin in a radial direction.4. The compressor of claim 3 , wherein said eccentric crank pin moves in a radial direction relative to said unloader bushing in response to rotation of said lever about said second axis.5. The compressor of claim 1 , wherein at least a portion of said lever is disposed within a groove formed in said driveshaft.6. The compressor of claim 5 , wherein the groove is formed in the eccentric crank pin.7. The compressor of claim 6 , wherein the groove extends into a concentric portion of the driveshaft.8. The compressor of claim 7 , wherein said lever includes a generally vertically extending portion and a generally ...

MULTI-BEARING SCROLL COMPRESSOR TO ENHANCE LOAD MANAGEMENT

A scroll compressor including a first bearing rotatably supporting a rotary shaft relative to a casing at one side of the rotary shaft with respect to a motor, a second bearing rotatably supporting the rotary shaft relative to the casing at the other side of the rotary shaft with respect to the motor, and a third bearing rotatably supporting the rotary shaft relative to an orbiting scroll at the opposite side of the first bearing with respect to the second bearing. The distance between a first bearing center and a third bearing center is a predetermined distance, the distance between a motor center and the third bearing center is longer than the distance between the motor center and the first bearing center, and the distance between a second bearing center and the motor center is longer than the distance between the second bearing center and the third bearing center. 1. A scroll compressor comprising:a casing;a motor to generate a driving force in the casing;a rotary shaft rotated by the motor;an orbiting scroll orbiting around the rotary shaft;a fixed scroll defining a compression chamber together with the orbiting scroll;a first bearing rotatably supporting the rotary shaft relative to the casing at one side of the rotary shaft with respect to the motor;a second bearing rotatably supporting the rotary shaft relative to the casing at the other side of the rotary shaft with respect to the motor; anda third bearing rotatably supporting the rotary shaft relative to the orbiting scroll at an opposite side of the first bearing with respect to the second bearing,wherein assuming that the center of the first bearing is a first bearing center, the center of the second bearing is a second bearing center, and the center of the third bearing is a third bearing center, in an extension direction of the rotary shaft, a distance between the second bearing center and the third bearing center is shorter than a distance between the second bearing center and the first bearing center. ...

SCROLL FLUID MACHINE AND METHOD FOR PRODUCING SAME

Provided is a scroll fluid machine capable of effectively achieving performance of a tip seal installed in a tooth crest of a wall including an inclined portion. The inclined portion in which a distance between opposing surfaces of end plates facing each other gradually decreases from an outer peripheral side toward an inner peripheral side is provided. A tip seal () configured to make contact with a tooth base facing the tip seal () to perform sealing against fluid is provided in tip seal groove () formed in a tooth crest of a wall () corresponding to the inclined portion. In a stop state where a scroll () does not perform compression of fluid, an inclination height (Ls′) of the tip seal () is smaller than an inclination height (Ls) of the wall (). 1. A scroll fluid machine comprising:a first scroll member including a first end plate and a first wall provided on the first end plate, the first wall having a spiral shape; anda second scroll member including a second end plate that is disposed to face the first end plate, and a second wall provided on the second end plate, the second scroll member being configured to relatively rotate in orbital motion with the second wall engaged with the first wall, the second wall having a spiral shape, whereinan inclined portion in which a distance between opposing surfaces of the first end plate and the second end plate facing each other gradually decreases from an outer peripheral side toward an inner peripheral side of the first wall and the second wall is provided,a tip seal is provided in groove portions formed in tooth crests of the first wall and the second wall corresponding to the inclined portion, the tip seal being configured to make contact with a tooth base facing the tip seal to perform sealing against fluid, andin a stop state where the scroll members do not perform compression of fluid, an inclination height of the tip seal is smaller than an inclination height of the wall.2. The scroll fluid machine according to ...

SCROLL FLUID MACHINE

A scroll expander includes: a driving scroll body having a first axis line as a rotary shaft line; a driven scroll body having, as a rotary shaft, a second axis line shifted with respect to the first axis line; a bearing plate having the second axis line as a rotary shaft; a cylindrical driving pin attached to the driving scroll body; and a cylindrical guide ring attached to the bearing plate and having an inner diameter larger than an outer diameter of the driving pin. Four driving pins are disposed on the circumference of a circle around the first axis line at an equal interval. Four guide rings are disposed on the circumference of a circle around the second axis line at the equal interval so as to correspond to the four driving pins. 1. A scroll fluid machine comprising:a driving scroll body that includes a pair of driving end plates and a driving wrap formed on each of the pair of driving end plates, and has a first axis line as a rotary shaft line;a driven scroll body that includes a driven end plate and a driven wrap formed on each of both surfaces of the driven end plate, is disposed between the pair of driving end plates, and has, as a rotary shaft line, a second axis line shifted with respect to the first axis line;a bearing plate that is disposed on each of both sides of the driven scroll body, includes a pair of plates coupled to the driven scroll body, and has the second axis line as a rotary shaft line;a cylindrical driving pin that is attached to the driving scroll body, and protrudes from the driving end plate to the bearing plate; anda cylindrical guide ring that is attached to the bearing plate, and includes an inner diameter larger than an outer diameter of the driving pin,wherein n driving pins (n≧4) or more are disposed on a circumference of a circle around the first axis line at an equal interval, andm guide rings (m=n≧4) or more are disposed on a circumference of a circle around the second axis line at the equal interval so as to correspond to ...

SCROLL COMPRESSOR AND AIR CONDITIONER INCLUDING A SCROLL COMPRESSOR

A scroll compressor and an air conditioner including a scroll compressor are provided. The scroll compressor may include a casing, a fixed scroll, an orbiting scroll, and an injection passage. The fixed scroll may further include a first injection hole and a second injection hole formed on a spiral flow passage, and a third injection hole and a fourth injection hole formed on the spiral flow passage at a position inwardly rotated by about 360 degrees from the first injection hole and the second injection hole along the spiral flow passage. The first injection hole and the third injection hole may be formed on an outer lane of the spiral flow passage, and the second injection hole and the fourth injection hole may be formed on an inner lane of the spiral flow passage. 1. A scroll compressor , comprising:a casing forming an enclosed space;a fixed scroll comprising a fixed wrap that defines a spiral flow passage;an orbiting scroll rotatably disposed in the casing, and comprising an orbiting wrap adapted to mutually engage with the fixed wrap to form a plurality of compression chambers; andat least one injection passage provided in the fixed scroll to inject refrigerant into the plurality of compression chambers, wherein the fixed scroll comprises a plurality of injection holes in fluid communication with the spiral flow passage, wherein the plurality of injection holes includes a first injection hole and a second injection hole, and a third injection hole and a fourth injection hole positioned approximately one spiral turn away from the first and the second injection hole along the spiral flow passage, wherein the first injection hole and the third injection hole are formed on an outer lane of the spiral flow passage, and wherein the second injection hole and the fourth injection hole are formed on an inner lane of the spiral flow passage.2. The scroll compressor of claim 1 , wherein the at least one injection passage is in fluid communication with the first injection ...

SCROLL COMPRESSOR WITH OIL MANAGEMENT SYSTEM

A compressor () is provided and may include a shell (), a main bearing housing () disposed within the shell (), a driveshaft (), a non-orbiting scroll member (), and an orbiting scroll member (). The driveshaft () may be supported by the main bearing housing (). The non-orbiting scroll member () may be coupled to the main bearing housing () and may include a first lubricant supply path in fluid communication with a lubricant source. The orbiting scroll member () may be rotatably coupled to the driveshaft () and may be meshingly engaged with the non-orbiting scroll member (). The orbiting scroll member () may include a recess () that is moved between a first position in fluid communication with the first lubricant supply path and a second position fluidly isolated from the first lubricant supply path. 1. A compressor comprising:a shell;a main bearing housing disposed within said shell;a driveshaft supported by said main bearing housing;a non-orbiting scroll member coupled to said main bearing housing and including a first lubricant supply path, said first lubricant supply path in fluid communication with a lubricant source; andan orbiting scroll member rotatably coupled to said driveshaft and meshingly engaged with said non-orbiting scroll member, said orbiting scroll member having a recess formed therein that is moved between a first position in fluid communication with said first lubricant supply path and a second position fluidly isolated from said first lubricant supply path.2. The compressor of claim 1 , wherein said recess is moved between said first position and said second position based on a relative position of said orbiting scroll member and said non-orbiting scroll member.3. The compressor of claim 2 , wherein said relative position of said orbiting scroll member and said non-orbiting scroll member is based on rotation of said driveshaft.4. The compressor of claim 1 , wherein said lubricant source is a lubricant supply region disposed adjacent to said ...

Scroll Compressor With Scroll Bolt Clamp Joint

A scroll compressor can include a housing, a rod member, and a nut. The housing can define a first bore. The non-orbiting scroll can include a flange. The flange can define a second bore. The rod member can have a first axial end that is coupled to the housing. The rod member can extend from the first bore and through the second bore to a second axial end of the rod member. The rod member can include at least one set of external threads. The at least one set of external threads can be disposed about the second axial end of the rod member. The nut can be threadably engaged with the second axial end of the rod member. The second bore can be disposed axially between the nut and the housing. The primary forces acting within the rod member are tensile forces, while torsional shear forces are minimized. 1. A compressor comprising:a housing defining a first bore;a first scroll supported by said housing for orbital motion relative to said housing and including a first endplate having a first spiral wrap extending therefrom;a second scroll supported by said housing and including a second endplate and a flange, said second endplate having a second spiral wrap extending therefrom and meshingly engaged with said first spiral wrap to form a series of compression pockets, said flange extending radially outwardly from said second endplate and defining a second bore;a rod member having a first axial end that is coupled to said housing, said rod member extending from said first bore and through said second bore to a second axial end of said rod member, said rod member including at least one set of external threads, said at least one set of external threads being disposed about said second axial end of said rod member; anda nut threadably engaged with said second axial end of said rod member, said second bore being disposed axially between said nut and said housing.2. The compressor of claim 1 , further comprising a bushing claim 1 , said bushing extending through said second bore ...

EXPANSION DEVICE FOR USE IN A WORKING MEDIUM CIRCUIT AND METHOD FOR OPERATING AN EXPANSION DEVICE

In an expansion device for use in a working medium circuit, for performing a process sequence corresponding to that of a Clausius Rankine cycle or an Organic Rankine cycle, a working unit comprising two interleaved scroll elements is provided of which one is stationary whereas the other is supported for orbiting relative to the stationary scroll element so as to form separate expansion regions between the scrolls moving, upon orbiting of the movable scroll, from the center of the interleaved scroll elements circularly outwardly with increasing volumes in which a working medium admitted at the center can expand for driving the movable scroll element. 111. An expansion device () for use in a working medium circuit (AK) for performing a process sequence within the working medium circuit , said process sequence corresponding to a Clausius Rankine cycle or Organic Rankine cycle , said expansion device () comprising a scroll-type working unit , through which a working medium (AM) flowing in the working medium circuit (AK) is conducted in the expansion direction , with an expansion ratio of the scroll-type working unit and an adjustable supply of working medium (AM) delivered to the scroll-type working unit.212324543787859195323291959195. The expansion device () according to claim 1 , further comprising a fixed scroll element () claim 1 , a movable scroll element () and an eccentric drive claim 1 , with the fixed scroll element () having a fixed scroll base plate () and a fixed scroll spiral wall () extending from the fixed scroll base plate () claim 1 , the movable scroll element () comprising a movable scroll base plate () and a scroll spiral wall () claim 1 , supported by a crank scroll base plate () so as to be movable therewith claim 1 , the movable scroll spiral wall () and the fixed scroll spiral wall () being in engagement with each other claim 1 , so that at least one expansion region (. to .) is formed between the movable scroll element () and the fixed scroll ...

CAPACITY MODULATED SCROLL COMPRESSOR

A capacity modulation assembly is provided and may include a control valve and a first line extending between the control valve and a suction pressure region disposed within a compressor shell, whereby the suction pressure region is in communication with a suction inlet gas fitting extending through a shell of a compressor. The capacity modulation assembly may additionally include a second line extending between the control valve and an intermediate pressure region disposed within the compressor shell, whereby the intermediate pressure region is in communication with compression pockets defined between an orbiting scroll and a non-orbiting scroll. 1. A compressor comprising:a shell defining an opening that receives a suction gas inlet fitting in communication with a suction pressure region disposed within the shell;a bearing housing fixed relative to the shell;a compression mechanism located within the shell, supported on the bearing housing and in communication with the suction pressure region, the compression mechanism including an orbiting scroll and a non-orbiting scroll that include spiral wraps defining compression pockets therebetween, at least one of the orbiting scroll and the non-orbiting scroll defining an intermediate passage that provides communication between the compression pockets and an intermediate pressure region disposed within the shell; anda capacity modulation assembly including a first control valve, a first line, and a second line, the first line extending between the suction pressure region and the first control valve, the second line extending between the intermediate pressure region and the first control valve, the first control valve selectively opening to provide communication between the intermediate pressure region and the suction pressure region and thereby separate the orbiting scroll and the non-orbiting scroll to reduce the capacity of the compressor.2. The compressor of claim 1 , wherein the first control valve is disposed ...

COMPRESSOR BEARING 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 a crank pin extending from said main body;a compression mechanism including a first member and a second member, said crank pin drivingly engaging said second member and causing motion of said second member relative to said first member;a bearing rotatably supporting said main body of said drive shaft; andan unloader rotatably engaging said bearing and slidably engaging said main body.2. The compressor of claim 1 , wherein said main body includes a flat surface that is substantially parallel with a longitudinal axis of said main body claim 1 , and said unloader includes a flat surface that slidably engages said flat surface of said main body.3. The compressor of claim 1 , wherein said main body includes a recess having first and second flat surfaces that are substantially parallel to a longitudinal axis of said main body.4. The compressor of claim 3 , wherein said unloader is at least partially received in said recess and includes first and second flat surfaces that engage said first and second flat surfaces claim 3 , respectively claim 3 , of said main body.5. The compressor of claim 4 , wherein said first and second flat surfaces of said unloader are substantially perpendicular to each other.6. The compressor of claim 4 , further comprising a biasing member disposed between said first flat surface of said main body and said first flat surface of said unloader claim 4 , said ...