ДВУХСЕКЦИОННЫЙ ЦЕНТРОБЕЖНЫЙ КОМПРЕССОР

Двухсекционный центробежный компрессор, содержащий корпус, размещенные в нем статор первой и второй секции, ротор с рабочими колесами и улиткой компрессора, в котором в статоре первой секции на валу жестко закреплено первое рабочее колесо, симметрично во второй секции на подшипниках вала расположено второе рабочее колесо, которое вращается в противоположную сторону относительно первого рабочего колеса первой секции. Вращение осуществляется приводом, включающим вал с закрепленной на нем ведущей шестерней редуктора и ведомые шестерни, вращающиеся на осях, закрепленных в корпусе редуктора, причем корпус редуктора жестко связан шлицевым соединением со вторым рабочим колесом второй секции. Изобретение направлено на повышение КПД компрессора. 1 ил.

КОМПРЕССОРНОЕ КОЛЕСО С УСТРАНЕНИЕМ ДИСБАЛАНСА И ПОЗИТИВНЫМ РЕГУЛИРОВАНИЕМ

... 1. Турбонагнетатель, содержащий:турбинное колесо (10);вал (111), прикрепленный к турбинному колесу (10);компрессорное колесо (132), расположенное на вале (111) напротив турбинного колеса (10), причем компрессорное колесо (132) включает заднюю стенку (134) и осевое отверстие (137); инаправляющую шайбу (150), размещенную смежно с задней стенкой (134) компрессорного колеса, включающую внутренний диаметр (162), наружный диаметр (160) и конусовидное направляющее кольцо (154), которое проходит в осевое отверстие (137).2. Турбонагнетатель по п. 1, отличающийся тем, что компрессорное колесо (132) включает фаску (138), размеры и конфигурация которой предназначены принимать конусовидное направляющее кольцо (154).3. Турбонагнетатель по п. 2, отличающийся тем, направляющая шайба (150) включает прорезь (164), проходящую от внутреннего диаметра (162) к наружному диаметру (160).4. Турбонагнетатель по п. 3, дополнительно содержащий гайку (113), навинченную на вал (111) и способную обеспечивать осевое сжимающее ...

МАСЛЯНОЕ УПЛОТНЕНИЕ МАСЛООТБОЙНОГО КОЛЬЦА И ТУРБОНАГНЕТАТЕЛЬ, СОДЕРЖАЩИЙ ТАКОЕ МАСЛЯНОЕ УПЛОТНЕНИЕ

... 1. Масляное уплотнение компрессора, содержащее:упорный подшипник (59), предназначенный для размещения в полости (33) корпуса турбонагнетателя концентрично валу (11) компрессорного колеса турбонагнетателя;вставляемую деталь (360), предназначенную для размещения в полости (33), смежной с упорным подшипником (59), при этом упорный подшипник (59) и вставляемая деталь (360) выполнены с возможностью образования между ними полости (35) для слива масла;маслоотбойное кольцо (340), содержащее фланец (382) маслоотбойного кольца и часть (383) втулки, выходящую из него, при этом фланец (382) маслоотбойного кольца выходит между упорным подшипником (59) и вставляемой деталью (360) и при этом часть (383) втулки проходит в осевом направлении в отверстие (385) вставляемой детали, выполненное в центральной части вставляемой детали (360); инесколько сегментов (74) спиральной лопатки, расположенных по окружности с шагом вокруг фланца (382) маслоотбойного кольца.2. Масляное уплотнение компрессора по п. 1, отличающееся ...

ТУРБОМАШИНА

... 1. Турбомашина (1), содержащая корпус (2), электрическую часть (3) турбомашины, вал (4) ротора, установленный в опорах корпуса, ротор электрической части (3) турбомашины, расположенный на валу (4) ротора и радиальная крыльчатка (5), установленная на, по меньшей мере, одном конце вала (4) ротора, характеризующаяся тем, что для осевой фиксации вала (4) ротора используется вкладыш (6) магнитного подшипника, взаимодействующий с внутренней торцевой частью (7) радиальной крыльчатки (5), и установленный на стенке корпуса (2) со стороны крыльчатки. ! 2. Турбомашина (1), по п.1, характеризующаяся тем, что вал (4) ротора установлен в магнитных подшипниках (11, 12). ! 3. Турбомашина (1), по п.1 или 2, характеризующаяся тем, что соответствующие радиальные крыльчатки (5, 8) установлены консольно на концах вала (4) ротора, а для осевой фиксации вала (4) ротора используются соответствующие вкладыши (6, 9) магнитного подшипника, которые взаимодействуют с внутренними торцевыми частями (7, 10) радиальных ...

СНИЖЕНИЕ НАГРУЗКИ ОТ ОСЕВОГО УСИЛИЯ В ТУРБОКОМПРЕССОРЕ

Устройство для создания динамического осевого усилия, предназначенное для уравновешивания общего осевого усиления радиальной вращающейся машины

Вращающаяся установка по меньшей мере с одним активным магнитным подшипником и вспомогательными подшипниками качения

КОМПРЕССОР СО ВСТРОЕННЫМИ ДВИГАТЕЛЯМИ И РАБОЧИМИ КОЛЕСАМИ, ОБЪЕДИНЕННЫМИ С РОТОРАМИ ДВИГАТЕЛЕЙ

Vakuumpumpe

Die Erfindung betrifft eine Vakuumpumpe mit einem Rotor und einer Welle (10; 110; 210; 310; 510; 610), einem Wälzlager (12; 112; 212; 312; 412; 612) und einem von dem Wälzlager beabstandeten Permanentmagnetlager (14; 114; 214; 314), welches einen Lagerstator (16; 116; 216; 316) und einen an der Welle angeordneten Lagerrotor (18; 118; 218; 318) umfasst. Um die negativen Auswirkungen von auf das Wälzlager einwirkenden Axialkräften zu vermeiden, wird vorgeschlagen, dass sie einen Krafterzeuger (30, 30'; 130; 230; 330; 430; 530; 630) beinhaltet, der eine in die Welle eingeleitete Kraft erzeugt. Die Erfindung stellt außerdem ein Verfahren zum Betrieb einer Vakuumpumpe vor, welches dadurch gekennzeichnet ist, dass eine Betriebsgröße der Vakuumpumpe bestimmt und abhängig von der Betriebsgröße mit einem Krafterzeuger eine Kraft in einen Rotor eingeleitet wird.

Axial retention of the fan shaft in a gas turbine engine

Gas turbine engine 10’ comprising a fan 14 driven by a fan shaft 14b and retractable axial retention means (32, fig. 4) for the fan shaft, slidingly mounted in a cavity 26 on a stator element and movable from a retracted, non-operational position (fig. 4) to an extended operational position (fig. 5) under the pressure of a fluid supplied to the cavity. The axial retention means may comprise at least one finger movable radially with respect to the fan’s rotation axis, biased into the retracted position by a spring (41, fig. 4). The stator element is preferably a support 24 for a rolling bearing 51 having at its radially outer periphery the aforementioned cavity and being surrounded by a downstream part of a fan disc 14a. The fluid which pushes the finger radially outwards to its extended position may be pressurised air or lubricating oil. The finger is extended while the engine is running, able to engage with an edge (36, fig. 4) extending radially inwards from the fan disc if the fan shaft ...

Fan Retention Shaft

Retaining the fan of a turbofan gas turbine engine in the event of an axial overload such as caused by an impact. The fan retention shaft having a connection between coaxial shafts 3 and 5 comprising an annular passage 7 between the shafts, the passage containing threads or flanges attached to the shafts and an energy absorbing medium 15a and 15b such as foam, a honeycomb structure or a liquid placed between the threads. Retaining formations such as a pin 17 and a key 9 are used to prevent the shafts moving with respect to each other, wherein the pin 17 is configured to allow relative axial movement between the shafts when a threshold axial overload is applied and the pin deforms or shears. The energy absorbing medium absorbs kinetic energy as the shafts, and threads or flanges, move axially relative to each other either crushing the foam or honeycomb structure or displacing the liquid.

Preload force tool

VACCUM PUMP

ROTOR OF A TURBOMACHINE

Two-piece labyrinth seal for a centrifugal compressor balance piston

A METHOD IN CONNECTION WITH A REFRIGERATION APPARATUS AND A REFRIGERATION APPARATUS

Motor-compressor with stage impellers integrated in the motor-rotors

A shaftless motor-compressor (1) is disclosed, comprising a casing (3) and at least one compressor stage (9A, 9B) arranged in the casing. Each compressor stage comprises a respective impeller (11A, 11B) arranged for rotation in the casing (3) around a rotation axis (A-A). Each impeller (11A, 11B) is combined with an embedded electric motor (13A, 13B) housed in the casing (3) and comprised of a motor stator (15A, 15B) and a motor rotor (17A, 17B). The motor stator (15A, 15B) of each compressor stage (9A, 9B) circumferentially surrounds the impeller (11A, 1B) and the motor rotor (17A, 17B), integral with the impeller. The motor rotor (17A, 17B) of each stage (9A, 9B) is arranged inside the respective motor stator.

CENTRIFUGAL REFRIGERANT VAPOUR COMPRESSORS

A centrifugal compressor for compressing a refrigerant vapour in a refrigeration cycle. The compressor comprises an impeller drive shaft (28)supported by first and second radial bearings (32) for rotation within the compressor housing and an impeller assembly including at least one centrifugal impeller wheel mounted on the impeller drive shaft to rotate with the impeller drive shaft. The first and second radial bearings are hydrodynamic fluid bearings in which the bearing fluid is the refrigerant vapour. The compressor further comprising a conduit (36) for supplying a portion of the refrigerant vapour from the impeller assembly to the first and second fluid bearings.

Uber ein Zahnradvorgelege angertiebener Kreiselverdichter bezw. Kreiselpumpe.

Uber ein Zahnradvorgelege angetriebener Kreiselverdichter bezw. Kreiselpumpe.

Lageranordnung für Molekularpumpen und Turbomolekularpumpen

A TURBOMACHINE.

Rotor of turbine

CONTROLLING AN AXIAL THRUST BY GUIDING AIR WHICH HAS BEEN TAKEN FROM A CENTRIFUGAL COMPRESSOR

TURBOMACHINE AND METHOD OF ASSEMBLING THE SAME

Cette turbomachine comporte un rotor avec un disque de butée (6) ainsi qu'au moins un carter (24, 26, 28) dans le(s)quel(s) le rotor est monté sur des paliers de manière à pouvoir pivoter autour d'un axe de rotation longitudinal (12), une butée fixe (34) coopérant avec le disque de butée (6) pour réaliser un maintien dans le sens longitudinal du rotor dans le(s) carter(s) (24, 26, 28), au moins une cale étant montée de manière amovible contre la butée fixe (34) entre cette dernière et un carter (26).

METHOD FOR REDUCING AERO CLEARANCE WITH BALL BEARING TURBOCHARGER

A product and method for use with a turbocharger system comprises a housing with a shaft rotationally supported by the housing. The shaft extends in an axial direction. A bearing assembly supports the shaft in the housing. A wheel is connected to the shaft and rotates with respect to the housing. A clearance opening is defined in the axial direction between the wheel and the housing. A thrust washer is engaged with the bearing assembly. The thrust washer has an outer circumference and is moved with respect to the housing. An efficiency washer is disposed around the outer circumference of the thrust washer and determines the clearance opening by defining a space within which the thrust washer moves with respect to the housing in the axial direction. COPYRIGHT KIPO 2016 ...

Impeller for centrifugal pumps

An impeller for centrifugal pumps has a first disk element, functionally arranged toward the inlet, which is coaxial to and faces a second disk element, which is functionally arranged toward the delivery and is connected rigidly to the first disk element by virtue of a series of angularly spaced vanes and is provided centrally with a means for fixing to a transmission shaft, The particularity of the present invention resides in that the impeller includes a series of openings formed in the substantially peripheral region of the second disk element, between pairs of adjacent vanes, substantially at the areas subjected to the greatest axial thrust.

AXIAL BEARING FOR AN ELECTRIC DRIVE

The invention relates to an axial bearing (12) for retaining a rotor (7) on a shaft (10) of an electric drive (6). The axial bearing (12) has a multi-sided outer contour.

STATIONARY SEAL RING FOR A CENTRIFUGAL COMPRESSOR

A stationary seal ring is adapted to cooperate with a housing and an impeller to define a seal. The impeller is rotatable about an axis and includes a first seal portion and a plurality of blades that define an outside diameter. The stationary seal ring includes an alignment surface engageable with the housing, and a plurality of teeth. Each tooth is spaced axially from an adjacent tooth to define a cavity therebetween. Each tooth includes a tooth tip that cooperates with the first seal portion to define a seal point. A first tooth disposed nearest to the blades has a first tip diameter. Each subsequent tooth has a tip diameter that is smaller than the first tip diameter.

AXIAL BEARING FOR AN ELECTRIC DRIVE

The invention relates to an axial bearing (12) for retaining a rotor (7) on a shaft (10) of an electric drive (6). The axial bearing (12) has a multi-sided outer contour.

IMPROVED THRUST BEARING FOR MULTISTAGE CENTRIFUGAL PUMPS

A pump has a thrust bearing has a casing with an inlet port and a discharge port. A shaft is positioned within the pump. A thrust bearing is coupled to the shaft. A pressure alterable bearing cavity is located within the casing. The pressure alterable cavity allows the axial thrust on the shaft from the impellers to be counteracted. The thrust bearing has an annular seal coupled with respect to the casing disc is coupled to the shaft and positioned adjacent the seal and the disc have a gap therebetween. A feedback pipe couples the bearing cavity to the inlet port. As the axial thrust acting on the shaft changes, the gap between the seal and the disc also changes. The changing of the gap changes the pressure within the bearing cavity. The disc and thus the shaft are repositioned in response to the change in the bearing cavity pressure change.

AXIAL VENTILATOR WITH EXTERNAL-ROTOR DRIVE MOTOR

L'invention concerne un ventilateur axial comprenant un moteur d'entraînement à induit extérieur. Le rotor externe a un aimant permanent qui coopère avec la matière ferromagnétique du stator pour produire une force magnétique (K) sur le rotor. Le stator abrite un tube support de palier (26) qui, à son tour, abrite un palier lisse radial (28) qui supporte un arbre (30) du rotor. Un palier lisse axial est formé entre l'extrémité libre de l'arbre de rotor (30) et un pendant solidaire du stator. Ce pendant solidaire du stator présente un élément épaulement (56; 156) réalisé dans un matériau antifriction, cet élément épaulement étant maintenu dans un élément élastomère moulé (70) qui, de son côté, s'appuie sur un élément carter (16) du ventilateur axial. L'élément élastomère moulé (70) permet d'atténuer et de réduire la retransmission de bruits de claquement au carter de ventilateur (16).

Vacuum Side-Channel Compressor

A vacuum side channel compressor ( 10 ) comprises a pump stator ( 14 ) and a pump rotor ( 12 ), which surround a side channel ( 31,32,33,34 ). An axial bearing ( 22 ) is provided for mounting the pump rotor ( 12 ). A sealing gap ( 40 ) is formed next to the side channel between the pump stator ( 14 ) and the pump rotor ( 12 ), part of which forms a conical ring whose imaginary cone apex ( 50 ) lies in the vicinity of the axial bearing ( 22 ).

Plastic steel bearing for blade rotor shaft of cooling fan

A bearing structure for the blade of cooling fan, comprises a hollow cylindrical body and an outward extended seat whose diameter is larger than the body. The seat has a recess at the bottom. The body forms a long cavity and upward flange. This bearing is placed in the hub of the cooling fan; the blade rotor shaft is inserted into the cavity of the bearing, and the flange of the body works as a C-clamp buckling the round groove on the blade rotor shaft to confine the motion of the rotor shaft. The bearing design renders easy fabrication and assembly, good dust shield to keep the dust off the rotor and reduce the rotary friction and resistance to the minimum. In addition, the magnetic force is limited for the self-adjustment, which further alleviates the frictional resistance sop the service life the cooling fan is extended longer.

Oil-retaining bearing structure for rotary machine

The present invention relates to an oil-retaining bearing for a rotary machine. In the oil-retaining bearing for a rotary machine according to the present invention, a first lock section is provided in a bearing housing; a first thrust spacer is relatively rotatably mounted in the vicinity of the end face of the oil-retaining bearing for a rotary machine; the first thrust spacer is provided with a second lock section, in engagement with the first lock section; a second thrust spacer is relatively non-rotatably mounted on the rotating shaft; and a third thrust spacer having elasticity is relatively rotatably mounted on the rotating shaft; the third thrust spacer being interposed between the first thrust spacer and the second thrust spacer. Furthermore, in the oil-retaining bearing structure for a rotary machine according to the present invention, a small hole is provided in the bearing housing through which the rotating shaft is mounted; at least one axial groove is formed in the inner surface ...

TURBOMACHINE WITH FAILURE PROTECTION

A turbomachine has a housing, a rotor shaft extending along and rotatable about an axis in the housing, and a pair of axially spaced axial-thrust bearings in the housing carrying the shaft and normally only permitting a predetermined small axial displacement of the shaft in the housing. An impeller is rotationally fixed on the shaft. An axially fixed transmission gear is rotationally coupled to the shaft and has an axially directed gear face. A collar fixed axially on the shaft has an axially directed collar face confronting the gear face and normally spaced from the gear face by a clearance equal to more than the predetermined axial displacement. Thus on failure of one of the bearings and axial overtravel of the shaft the gear face and collar face engage each other and limit axial movement of the shaft.

Coupling apparatus

A coupling apparatus (4) for connecting two rotatable shafts (2a, 3a) of a turbocompressor (1) includes a first and a second coupling part (4a, 4b) which form part of the shaft (2a, 3a) or are designed for firm connection to one end section of the shafts (2a, 3a) each. A third coupling part (4c) is designed in disc-shape and is arranged between the first and the second coupling part (4a, 4b). The first, second and third coupling part (4a, 4b, 4c) are firmly connectable to one another. The third coupling part (4c) has a section (41) which projects beyond the first or second coupling part (4a, 4b) in the radial direction and is designed as a bearing disc of an axial bearing (7).

Rotating machine with axial thrust

Axial thrust rotary steam or gas turbine The machine has a rotary thrust element (32) and a coupling wall (34) connected to its rotor shaft (16) by a single tubular connector (30). The machine itself consists of a stator (2), a rotor (4) which turns about a horizontal axis and a coupling balancer (8). The stator has two bearings (10,12) to support the rotor, and an axial thrust member (14), while the rotor has a shaft (16) with two bearing supports (18,20) and a working section (22) between them.

СНИЖЕНИЕ НАГРУЗКИ ОТ ОСЕВОГО УСИЛИЯ В ТУРБОКОМПРЕССОРЕ

Изобретение может быть использовано в турбокомпрессорах. Система турбокомпрессора имеет центробежный компрессор (901), содержащий рабочее колесо с множеством радиально расположенных лопаток, соединенных с неполным задним диском (952), и вал (904). Неполный задний диск (952) содержит множество вырезных секций. Каждая вырезная секция расположена между двумя лопатками на наружной окружности рабочего колеса. Вал (904) соединяет рабочее колесо компрессора с приводным блоком (960). Поворотный диск (974) расположен внутри полости (973) центрального корпуса (910) вала. Поворотный диск (974) соединен с валом (904). Полость (973) задана центральным корпусом (910) вала и стенками полости и ограничивает пространство, которое по меньшей мере частично окружает поворотный диск (974). Канал (970) соединяет выход (972) компрессора с полостью (973). Канал (970) соединяет по текучей среде выход (972) компрессора с пространством полости (973). Полость (973) полностью закрыта, кроме места соединения указанной ...

КРЫЛЬЧАТКА ДЛЯ ЦЕНТРОБЕЖНЫХ НАСОСОВ

Querstromventilator mit einem Laufrad sowie Verfahren zum Betreiben eines Querstromventilators

Querstromventilator mit einem Laufrad, das mittels einer Lagerung drehbar gelagert ist und das mindestens zwei Stützeinrichtungen aufweist, die mehrere, sich zwischen ihnen erstreckende Lüfterschaufeln halten, gekennzeichnet durch eine Spanneinrichtung (72) zur axialen Zug- oder Druckbeaufschlagung der Lüfterschaufeln (36).

ZENTRIFUGALKOMPRESSOR.

Vacuum pump

A vacuum pump comprising rotor assembly which is rotatable supported by a first bearing 28 and a second bearing 30, wherein at least one bearing is a ball bearing, the vacuum pump comprises a preload force compensator unit 38, which generates a force to adjust the preload force on the at least one ball bearing, a control unit 36 is connected to at least one sensor detect a pumping parameter, then further connected to the preload force compensator unit to generate a force dependent on the detected pump parameter. The preload force generator may be mechanical, electromagnetic or smart material. The controller may consider more than one parameter of the pump when determining the appropriate preload force. The controller may operate a machine learning module to determine the appropriate preload force.

Centrifugal compressors

Leveling plate and thrust bearing device using the same

Fan retention shaft

Improvements in centrifugal compressors

... 485,383. Bearings. BRISTOL AEROPLANE CO., Ltd., and FEDDEN, A. H. R. Nov. 19, 1936, No. 31733. [Class 12 (i)] [Also in Group XXVI] A centrifugal compressor has an impeller supported by two bearings, one race of each being fixed to the impeller shaft and the other two races being movable axially and spring pressed in opposite axial directions. The inner race 15 is fixed to the shaft 10 by means of the rings 14, 16 and the nut 17. The outer race 30 is slidable in the recess 29 of the housing 25 bolted to the casing 22. The outward movement of this race is limited by the wall of the cover 27, which is formed with local hollow cylindrical enlargements 31 housing spring loaded plungers 32, which act on the outer race 30. A similar bearing is located at the right-hand end of the shaft, the outer race 41 of which is spring pressed by plungers 40 in the opposite direction. The outward movement of this race is limited by the cover wall 38. Open sides 45, 46 in the outer races allow the ball bearings ...

DRIVESHAFT FOR A MAGNETIC BEARING MECHANISM

ENGINE-CLAIMANT DEVICE FOR CENTRIFUGAL LIQUID CIRCULATION, LIKE A MOTORPUMPE OR A COMPRESSOR

A compressor unit and a method to process a working fluid

A compressor unit for processing a working fluid comprising a compressor (3) inside a housing (7) to compress the working fluid, wherein a collection chamber (19) is fluidly coupled with a working fluid inlet (71) of said housing (7).

CONICALLY JOINTED TURBOCHARGER ROTOR

TURBOMACHINE WITH ACTIVE TIP CLEARANCE SYSTEM

A turbomachine including a case, a rotor, a plurality of rotor blades on the rotor each having a blade tip, a shroud around the rotor blade tips, and means mounting the rotor on the case for rotation about a centerline of the case and for bodily shiftable movement in the direction of the centerline. The rotor blade tips and an inside wall of the shroud flare radially outward in the direction of the centerline so that when the rotor moves in the direction of the centerline toward the shroud a clearance gap between the blade tips and the inner wall of the shroud decreases and vice versa. An electromagnetic actuator on the case magnetically attracts a thrust plate on the rotor against a net dynamic force on the rotor. A control system of the actuator controls the magnetic attraction of the actuator in response to signals from a position sensor measuring the actual magnitude of the clearance gap to maintain the actual clearance gap at a predetermined magnitude.

TURBOCHARGER HAVING THRUST BEARING ASSEMBLY

Radiator fan

The invention discloses a radiator fan which comprises a bearing support, a bearing assembly, a stator and a rotor, wherein the rotor comprises a rotating shaft which is held in the bearing support; the bearing assembly comprises a ball bearing, an elastic element, an oil-retaining bearing and an oil-storing element; the ball bearing and the oil-retaining bearing are held in the bearing support; the rotating shaft is arranged in the ball bearing and the oil-retaining bearing in a penetrating way; the elastic element is arranged close to the ball bearing and provides pretightening force for the ball bearing; and the oil-storing element is arranged close to the oil-retaining bearing and provides lubrication for the oil-retaining bearing. In the invention, the ball bearing is pretightened and the oil-retaining bearing limits the radial motion of the rotating shaft, thus reducing the vibration of the rotating shaft when the radiator fan works and reducing the noise; and the oil-storing element ...

EXPANDER-INTEGRATED COMPRESSOR, FREEZER, AND FREEZER OPERATION METHOD

Turbocharger with thrust bearing providing combined journal and thrust bearing functions

Turbochargers typically have separate hydrodynamic journal and thrust bearings. A turbocharger thrust bearing for a turbocharger is provided that merges the function of a journal bearing into a thrust bearing while maintaining the thrust bearing function to produce a turbocharger with a reduced axial space envelope. Such a thrust bearing includes a bore contoured to have a plurality of taper-land pairs distributed circumferentially about the bore. As a result, the axial length of the turbocharger bearing housing and shaft can be reduced.

Shaft seal

The aim of the invention is to improve sealing of a storage chamber of turbochargers in relation to the rear chamber of a compressor. The seal is extended about a collecting chamber (51) in the bearing housing (5). Subsequently, the seal comprises, adjacent to the collecting chamber, a type of labyrinth which is formed, for example, by at least one protruding projection (42). Finally, the seal system comprises a collecting groove (52) in the bearing housing.

Compressor drive gear with central wheel - has pinion shafts equipped with thrust rings

RADIAL TURBOCOMPRESSOR SEVERAL STAGES

EXHAUST GAS TURBOCHARGER

The invention relates to an exhaust gas turbocharger (1) with a shaft (2) on which a turbo turbine (4) and a compressor turbine (3) are mounted and which is guided in radial bearings (5, 6) and at least one axial bearing (9). The inventive turbocharger is characterized in that the radial bearings (5, 6) are configured as passive magnetic bearings comprising permanent magnets (23 to 31) that produce axial magnetic fluxes and the axial bearing (9) is configured as an active magnetic bearing comprising a solenoid (55), an axial sensor and a control for controlling the electric power impinging the solenoid (55).

Venting device for magnetically supported vacuum pumps

A venting arrangement for a magnetically supported vacuum pump which has a high speed rotor, wherein the load carrying capacity of the axial magnetic bearing is increased in the course of the venting process by reducing the gap between the axial support disk and the axial magnet in order to carry the additional forces caused by the venting process. In normal operation, the gap is adjusted to an upper limit value.

MOTOR AND BEARING COOLING PATHS

A compressor includes a rotor configured to compress air and driven by a shaft. A motor is drives the shaft. The first and second journal bearings facilitate rotation of the shaft. The first journal bearing is upstream from the motor and the second journal bearing is downstream from the motor. The transfer tube is configured to provide cooling air from a bearing cooling air inlet to the first journal bearing. A method for cooling a compressor is also disclosed.

Turbomachine

A turbomachine includes: a rotational shaft; a pair of thrust collars disposed around the rotational shaft; a thrust bearing disposed around the rotational shaft at an axial directional position between the pair of thrust collars; and an oil-drain channel disposed around the rotational shaft, for draining lubricant oil after lubricating a sliding portion between the thrust bearing and the thrust collars. The oil-drain channel includes: an oil-drain port portion for discharging the lubricant oil inside the oil-drain channel downward; and an oil-guide channel portion disposed above the oil-drain port portion and configured to guide the lubricant oil from the sliding portion in a circumferential direction of the rotational shaft to the oil-drain port portion. The oil-guide channel portion has an asymmetric shape with respect to a rotational direction of the rotational shaft, the oil-guide channel portion having a minimum flow-path cross sectional area at a first position on an upstream side ...

Multistage radial turbocompressor

A multistage radial turbocompressor has at least first, second, and third intake parts each forming a respective intake spaced along an axis and first, second, and third output parts each forming a respective output axially juxtaposed with the respective intakes. Respective first, second, and third fans having axially directed vanes are rotatable in the housing formed by the parts between the intakes and outputs. A shaft centered on the axis carries the first, second, and third fans. One of the fans is back-to-back with another of the fans with the vanes of the one fan facing axially oppositely away from the vanes of the other of the fans. Radial bearings support the shaft in the housing, and an axial bearing between the one fan and the other fan supports the shaft in the housing.

Motor and electrically-driven fan employing the same

An electrically-driven fan 1 comprises a base portion 2 ; a bearing portion 11 ; a stator 13 including iron core portions 15 and coils 16 ; a rotor 4 including a rotary shaft 20 and a cylindrical magnet 22 ; blowing blades 5 ; and a rotor position detector 23 which is disposed on a side of the cylindrical magnet 22 near to the base portion 2 , with a gap of predetermined width relative to the cylindrical magnet 22 ; wherein the cylindrical magnet 22 includes a thin-walled portion 24 in which an effective thickness of one end part thereof near to the rotor position detector 23 is made smaller than an effective thickness of the other end part thereof.

METHOD AND DEVICE FOR REDUCING AXIAL THRUST AND RADIAL OSCILLATIONS AND ROTARY MACHINES USING SAME

SIDE-CHANNEL COMPRESSOR WITH SYMMETRIC ROTOR DISC WHICH PUMPS IN PARALLEL

Apparatus for mounting, and for maintaining running clearance in, a double entry radial compressor

A gas generator having a double entry low pressure centrifugal compressor, a single entry high pressure centrifugal compressor and a radial inflow turbine positioned coaxially and coupled for interdependent rotation by a single shaft assembly for the double entry compressor mounted to the generator frame using a plurality of rigid hollow cross-over ducts which also carry diffused compressed air to the high pressure compressor, where the single shaft assembly uses two shaft portions connected by an expansible coupling having a helical spline torque transmitting device to allow the double entry compressor rotor to "follow" compressor housing axial position changer and to maintain a close running clearance despite thermal expansion in the structure between the low pressure (LP) and high pressure (HP) compressor portions of the gas generator.

РАБОЧЕЕ КОЛЕСО ДЛЯ ЦЕНТРОБЕЖНЫХ НАСОСОВ

Группа изобретений относится к центробежным насосам. Рабочее колесо центробежного насоса содержит первый дисковый элемент, функционально расположенный навстречу впуску и являющийся коаксиальным и обращенным ко второму дисковому элементу, который функционально расположен навстречу нагнетанию. Дисковые элементы жестко соединены между собой лопастями, размещёнными через угловыеинтервалы. Второй дисковый элемент закреплен по центру на трансмиссионном валу крепежным средством. В периферийной зоне второго дискового элемента, между парами соседних лопастей в зонах, на которые действует самое большое осевое усилие, имеются проемы. Проемы образованы оконтуренными щелями. Радиально периферийная сторона каждой из оконтуренных щелей имеет дугообразный профиль с выпуклостью, обращенной к оси вращения. Изобретение обеспечивает значительное уменьшение осевых усилий, но одновременно обеспечивает максимальный КПД и напор. 8 н. и 4 з.п. ф-лы, 18 ил.

ВЫСОКОЭФФЕКТИВНОЕ ЦЕНТРОБЕЖНОЕ РАБОЧЕЕ КОЛЕСО

Описано использование балансировочного груза, устанавливаемого в балансировочном отверстии вращающегося компонента, состоящего из цилиндрического корпуса, имеющего желаемый вес. В части корпуса сформировано отверстие для образования полого прохода, а механизм соединяет цилиндрический корпус с внутренностью балансировочного отверстия. 2 н. и 17 з.п. ф-лы, 6 ил.

Компрессор с уравновешиванием осевого усилия и способ уравновешивания

... 1. Компрессор для установки двигатель-компрессор, содержащий на вращающемся валу (2) уравновешивающий поршень (7), группу облопаченных колес (R), заднюю полость (11) поршня, расположенную смежно с уравновешивающим поршнем (7) на стороне, противоположной группе облопаченных колес (R), регулирующий клапан (14), выполненный с возможностью соединения указанной задней полости (11) со входом группы облопаченных колес (R), камеру (20) давления всасывания, соединенную со входом группы облопаченных колес (R), при этом указанная задняя полость (11) расположена между уравновешивающим поршнем (7) и камерой (20) давления всасывания, отличающийся тем, что он содержит камеру (18) давления нагнетания, расположенную между задней полостью (11) поршня и камерой (20) давления всасывания, причем камера (18) давления нагнетания соединена через нагнетательную линию (19) с областью (10) нагнетания, расположенной между группой облопаченных колес (R) и уравновешивающим поршнем (7).2. Компрессор по п. 1, содержащий ...

Strömungsmaschine für einen Energiewandler, insbesondere eine Brennstoffzelle

Die Erfindung betrifft eine Strömungsmaschine (10) für einen Energiewandler, insbesondere eine Brennstoffzelle, mit einem Verdichter (12) zum Verdichten von dem Energiewandler zuzuführender Luft, mit einem Laufzeug (20), welches ein Verdichterrad (14) des Verdichters (12) umfasst, und mit einer Lagereinrichtung (52), welche wenigstens ein als Punktlager (58) ausgebildetes Axiallager umfasst, mittels welchem das Laufzeug (20) an wenigstens einer Lagerstelle (87) in axialer Richtung gelagert ist, wobei ein Ferrofluid (88) zum Schmieren der Lagerstelle (87) vorgesehen ist.

Turboverdichter

Bei der erfindungsgemäßen Ausführung handelt es sich um einen Turboverdichter, der zur Luftversorgung einer Brennstoffzelle geeignet ist, umfassend ein Gehäuse, eine Welle mit einem ersten und zweiten Ende, die gegenüber dem Gehäuse drehbar gelagert ist, und einer in dem Gehäuse angeordneten elektrischen Maschine, wobei die Welle mittels der elektrischen Maschine antreibbar ist.Zur Verbesserung des Turboverdichters wird vorgeschlagen, dass zur Lagerung der Welle ein erstes und ein zweites Lagerkonzept vorgesehen sind, wobei zumindest das erste Lagerkonzept eine Magnetlagerung umfasst, wobei zur Lagerung das Magnetfeld der elektrischen Maschine genutzt wird.

Magnetic bearing for high speed rotor - has permanent magnets and solenoids adjusting rotor axial position for stabilising during critical speed range

The magnetic bearing of high speed rotor has a stator with two magnetic systems interacting with ferromagnetic rotor parts. The rotor is actively stabilised axially and passively in the radial direction. The first magnetic system (8) has a permanent magnetic ring (9). The second magnetic system (20) or rotor has two parts between which is arranged a ferromagnetic part (32) of the rotor or stator with pole rings. The second magnetic system has round solenoids. The axial position of the rotor is adjusted by these solenoids in relation to axial displacement signals.

Vakuumpumpe

Vakuumpumpe, insbesondere Turbomolekularpumpe, mit einer in einem Pumpengehäuse (12) angeordneten von zwei Lageranordnungen (14) gelagerten Rotorwelle (10), wobei eine der Lageranordnungen (14) ein Wälzlager (16) aufweist, dadurch gekennzeichnet, dass das Wälzlager (16) von einer Hülse (22) umgeben ist, die in dem Pumpengehäuse (12) über eine radiale Verschiebung des Wälzlagers (16) ermöglichende Wälzkörper (28) angeordnet ist.

Vacuum pump

A catcher ring assembly

Motor-compressor with stage impellers integrated in the motor-rotors

A shaftless motor-compressor (1) is disclosed, comprising a casing (3) and at least one compressor stage (9A, 9B) arranged in the casing. Each compressor stage comprises a respective impeller (11A, 11B) arranged for rotation in the casing (3) around a rotation axis (A-A). Each impeller (11A, 11B) is combined with an embedded electric motor (13A, 13B) housed in the casing (3) and comprised of a motor stator (15A, 15B) and a motor rotor (17A, 17B). The motor stator (15A, 15B) of each compressor stage (9A, 9B) circumferentially surrounds the impeller (11A, 1B) and the motor rotor (17A, 17B), integral with the impeller. The motor rotor (17A, 17B) of each stage (9A, 9B) is arranged inside the respective motor stator.

METHODS AND APPARATUS FOR CONTROLLING BEARING LOADS WITHIN BEARING ASSEMBLIES

An orifice plate assembly (82) for a gas turbine engine (10) that facilitates extending a useful life of bearing assemblies (70) within the gas turbine engine is described. Each orifice plate assembly is coupled in flow communication with an engine air source (74), and includes a first body portion (100) and a second body portion (102). The first body portion includes a channel (108) and a flow opening (130). The channel is sized to receive the second body portion, such that the second body portion may slide with respect to the first body portion. The orifice plate assembly is adjustable after engine shutdown to regulate bearing loading.

ROTARY MACHINE WITH IMPROVED SHAFT

A rotary machine (3) is disclosed, which comprises comprising: a rotary shaft (7) having a rotation axis (A-A), a first shaft end (7A), and a second shaft end (7B); a first bearing arrangement (10) at the first shaft end (7A); a second bearing arrangement (11) at the second shaft end (7B); a coupling flange (31) mechanically connected to the first shaft end (7A). The coupling flange (31) is mechanically connected to the first shaft end (7A) by means of a first axial-contact coupling (35), such as a Hirth joint, for instance.

COMPRESSOR WITH THRUST BALANCING AND METHOD THEREOF

Compressor for a motor-compressor set, comprising, on a rotating shaft (2), a balancing piston (7), a set of bladed wheels (R), a rear cavity (11) of the piston adjacent to the balancing piston (7) on a side opposite to the set of bladed wheels (R), a regulation valve (14) suitable for coupling the rear cavity (11) to the input of the set of bladed wheels (R), a suction pressure chamber (20) coupled to the input of the set of bladed wheels (R), the rear cavity (11) being arranged between the balancing piston (7) and the suction pressure chamber (20). The compressor comprises a discharge pressure chamber (18) arranged between the rear cavity (11) of the piston and the suction pressure chamber (20), the discharge pressure chamber (18) being coupled via a discharge line (19) to a discharge area (10) situated between the set of bladed wheels (R) and the balancing piston (7).

A DEVICE FOR DETECTING THE AXIAL POSITION OF A ROTARY SHAFT AND ITS APPLICATION TO A TURBO-MOLECULAR PUMP

A device for detecting the axial position of a rotary shaft (10) of a rotary machine, the device comprising a target (12) of ferromagnetic material placed at the end of the rotary shaft, an induction coil (31) associated with a stationary magnetic circuit (32) secured to a structure of the rotary machine and placed facing the target while leaving an airgap (60), and a power supply circuit for powering the induction coil, in which device the power supply circuit comprises an AC voltage source (1) connected between a first end (7) of the induction coil and a zone (6) situated at a reference voltage (0 V), at least one capacitor (2) connected between said first end of the induction coil and a second end (8) of the induction coil, and a detector device (4) interposed between the second end and the zone situated at the reference voltage (0 V), in order to deliver on a line (5) information (i L) about the magnitude of the current flowing between said second end and said zone situated at the reference ...

A DEVICE FOR DETECTING THE AXIAL POSITION OF A ROTARY SHAFT, AND ITS APPLICATION TO A TURBO-MOLECULAR PUMP

A device for detecting the axial position of a rotary shaft (10) of a rotary machine, the device comprising a target (12) of ferromagnetic material placed at the end of the rotary shaft, an induction coil (31) associated with a stationary magnetic circuit (32) secured to a structure of the rotary machine and placed facing the target while leaving an airgap (60), and a power supply circuit for powering the induction coil, in which device the power supply circuit comprises an AC voltage source (1) connected between a first end (7) of the induction coil and a zone (6) situated at a reference voltage (0 V), at least one capacitor (2) connected between said first end of the induction coil and a second end (8) of the induction coil, and a detector device (4) interposed between the second end and the zone situated at the reference voltage (0 V), in order to deliver on a line (5) information (i L) about the magnitude of the current flowing between said second end and said zone situated at the reference ...

Pressure equalizer in thrust chamber electrical submersible pump assembly having dual pressure barriers.

A well pump assembly has a rotary pump with an electrical motor that contains a motor lubricant. A thrust chamber is mounted between the motor and the pump, the thrust chamber containing a thrust chamber lubricant. Seals prevent the entry of thrust chamber lubricant into the motor chamber. A pressure equalizing chamber is mounted to the motor for admitting well fluid. A first pressure barrier in the equalizing chamber equalizes the pressure of the thrust chamber lubricant with that of the well fluid. A second pressure barrier contained within the first pressure barrier equalizes the pressure of the motor lubricant with thrust chamber lubricant.

PRESSURE EQUALIZER IN THRUST CHAMBER ELECTRICAL SUBMERSIBLE PUMP ASSEMBLY HAVING DUAL PRESSURE BARRIERS

A well pump assembly has a rotary pump with an electrical motor that contains a motor lubricant. A thrust chamber is mounted between the motor and the pump, the thrust chamber containing a thrust chamber lubricant. Seals prevent the entry of thrust chamber lubricant into the motor chamber. A pressure equalizing chamber is mounted to the motor for admitting well fluid. A first pressure barrier in the equalizing chamber equalizes the pressure of the thrust chamber lubricant with that of the well fluid. A second pressure barrier contained within the first pressure barrier equalizes the pressure of the motor lubricant with thrust chamber lubricant.

Radiator fan

A heat radiating fan includes a fan frame the center of which is formed with a middle column; at least one bearing is arranged in the middle column; a stator is sheathed in the periphery of the middle column; a rotor can rotate relatively to the stator; the rotor includes a hub annularly arranged on the periphery of the stator, a plurality of fan vanes annularly arranged on the periphery of the hub, a permanent magnet ring closely arranged on the inner side of the hub as well as a rotating shaft vertically extending from the center of the hub and being accepted in the bearing; the stator includes the iron core of the stator, a coil twisted on the iron core of the stator as well as a circuit board electrically connected with the coil; the iron core of the stator includes an annular part and a plurality of claw poles extending from the periphery of the annular part to the external radical direction; at least one column body is upwards and convexly arranged on the circuit board; the column ...

Thrust bearing cooling path

Thrust bearing shaft for fan

A thrust shaft for a fan has a shaft body with an enlarged disk adjacent one axial end to provide a rotating surface in a pair of thrust bearings. A first cylindrical portion extends from the disk in a first direction, and a second cylindrical portion extending from the disk in a second opposed direction. The second cylindrical portion has a hollow bore, and there is a plurality of holes extending through the second cylindrical portion to communicate an outer periphery with the bore. A ratio of the diameter of the bore to a diameter of the plurality of air holes is between 6.60 and 7.00. A ratio of an overall length of the second cylindrical portion, and a distance from a face of the enlarged disk to a center of the holes is between 14.4 and 15.2. A thrust bearing assembly, a fan, a cabin air supply system, and a method are also disclosed.

DEVICE OF DETECTION OF the AXIAL POSITION Of a ROTATING SHAFT AND APPLICATION HAS a PUMP TURBO-MOLECULAIRE

Centrifugal compressor for overhanging centrifugal compressor unit of machine, has conduit and cavity that compensate axial push created by effort exerted by gas on impeller and applied on rotor, when compressor stops

Ce compresseur centrifuge comprend un ensemble d'au moins une roue à aubes (38) de compression montée sur un rotor (28) destiné à être entraîné en rotation par un moyen moteur dans un corps statorique (30, 32) et des moyens de compensation (44,48) de la poussée axiale qui est engendrée par l'effort exercé par le gaz sur la roue à aubes et qui est appliquée sur le rotor. Les moyens de compensation sont adaptés pour compenser la poussée axiale supportée par le rotor à l'arrêt du compresseur.

PUMP TURBOMOLECULAIRE

Pompe turbomoléculaire comprenant un stator (1, 9) et un rotor (2) supporté dans le stator par le moyen de deux paliers à roulements (6, 8) dont l'un (8) au moins est en appui sur au moins une portée (16) du stator (9-1) servant de butée axiale pour le rotor (2), caractérisée en ce que ledit appui dudit roulement (8) sur ladite portée (16) est un appui en flexion et non pas en cisaillement.

Centrifugal compressor or pump controlled via a gear train

FUEL PUMP

conjunto de bomba de poço submergível contendo equalizador de pressão de câmara de propulsão tendo duplas barreiras de pressão

SYSTEM AND APPARATUS FOR REDUCING THRUST FORCES ACTING ON A COMPRESSOR ROTOR

A system and method of counterbalancing an aerodynamic thrust force generated by the impellers of a centrifugal compressor is disclosed. A rotor assembly includes a rotatable shaft disposed within a housing, and having a plurality of impellers axially-spaced from each other and coupled to the rotatable shaft for rotation therewith. Adjacent impellers along the rotatable shaft are each separated from each other with a stationary wall having one or more magnets coupled thereto. The magnets are disposed axially-adjacent a hub-side of each impeller such that the one or more magnets magnetically-attract each impeller toward the adjacent stationary wall, thereby reducing a net impeller thrust of the rotor assembly.

Side-channel pump with axial gas bearing

The present invention provides a pump comprising a regenerative pumping mechanism. A rotor of the pump has a generally disc-shaped pump rotor mounted on an axial driveshaft for rotation relative to a stator, the pump rotor having rotor formations disposed in a surface and defining at least a portion of a flow path for pumping gas from an inlet to an outlet. The rotor formations are formed between the pump rotor and the stator of the pumping mechanism. The pump rotor and the stator comprise an axial gas bearing arrangement for controlling axial clearance between the rotor and the stator during pump operation. Thus, this configuration of pump provides a gas bearing disposed on the rotor which enables an improved control of axial clearance between the pump's rotor and stator components.

Axial gas thrust bearing for rotors in rotating machinery

An axial gas thrust bearing for rotors in rotating machinery includes at least one radial disk, integral with or fastened to the rotor and one fixed seal facing each disk or two fixed seals positioned to surround each disk, lower portions of the seals being situated at a distance from the rotor to allow the inflow of compressed fluid passing in the gap between the respective disk and seals, thereby combining the properties of a balance piston and thrust bearing disk.

Ultra high pressure turbomachine for waste heat recovery

A turbine-driven alternator (i.e., a turbomachine) suitable for generating electrical power from process gas waste energy. In particular suitable for very high density process gases such as super critical CO2, R134a, R245fa, etc. The turboalternator comprises two separate machines, specifically, a turbine device and an alternator device operatively connected together by a coupling shaft. The rotating shaft assemblies for each machines on the turbine side and the alternator side are supported by hydrodynamic foil gas bearings. The foil gas bearings use process gas at the turbine side, enabling high-pressure operation (˜3000 psia) and thrust load balancing. At the alternator side, cooling fluid is used in the foil gas bearings, enabling high-speed (˜40,000 rpm), low-windage, oil-free operation with closed-loop shaft cooling.

Heat-dissipation fan

A heat-dissipation fan comprises a hollow cylinder body, a fixing pillar, a stator, a fan wheel, a bearing and bearing plate. The fixing pillar comprises a free end and a fixing end fixed at the hollow cylinder body. The stator is installed at the hollow cylinder body being installed at the bearing plate. The fan wheel comprises a top plate, an outer ring wall, an inner ring wall and a penetration hole formed at the top plate. The inner ring wall surrounds the penetration hole, the hollow cylinder body and the stator are located between the outer ring wall and the inner ring wall, and the bearing is coupled to the inner ring wall. The free end of the fixing pillar is protruded to a top surface of the top plate, which results a supporting surface and the top surface being spaced apart by a first spacing.

Fan

A fan includes a motor and an impeller. The motor includes a stationary portion and a rotating portion rotatably supported by the stationary portion. The stationary portion includes a stator and a bearing portion arranged inside of the stator. The rotating portion includes a rotor magnet arranged radially outside the stator; a shaft inserted in the bearing portion, and having an upper portion fixed to the impeller directly or through one or more members; and a thrust portion arranged axially opposite the bearing portion, and including an annular surface arranged around the shaft.

Hybrid bearing turbomachine

A turbomachine includes a housing and a rotatable shaft, where at least a portion of the rotatable shaft is located in the housing. The turbomachine also includes a magnetic thrust bearing that axially positions the rotatable shaft and a radial bearing that centers the rotatable shaft. The turbomachine includes a flexure including a first portion secured to the housing and a second portion axially moveable relative to the first portion. The second portion of the flexure is connected to the radial bearing, and the second portion moves axially to eliminate thrust loads on the radial bearing and allow the magnetic thrust bearing to carry axial loads.

Thrust Bearing Cooling Path

A compressor rotor compresses and delivers compressed air across a turbine rotor. The turbine rotor is connected to the compressor rotor such that rotation of the turbine rotor drives the compressor rotor. A shaft is connected to rotate with the turbine rotor and the compressor rotor. A thrust bearing is provided by a member extending perpendicular and radially outwardly of the shaft. The member rotates with the shaft and faces a first housing wall. A hollow chamber is formed on an opposed side of the first housing wall. A cooling air path supplies air across a thrust bearing surface, and between the member and the first housing wall. The first housing wall has a communication hole for communicating cooling air from the cooling air path into the hollow cavity to drive air within the hollow chamber. Also, a housing incorporating the communication hole is disclosed. 1. An air machine comprising:a compressor rotor for compressing air and delivering compressed air to a downstream inlet, air from said downstream inlet passing across a turbine rotor to drive said turbine rotor to rotate, and said turbine rotor being connected to said compressor rotor such that rotation of said turbine rotor drives said compressor rotor to rotate and compress the air;a shaft connected to rotate with said turbine rotor and said compressor rotor and to define a center line; anda thrust bearing provided by a member extending perpendicular and radially outwardly of said shaft, said member rotating with said shaft, and facing a first housing wall, a hollow chamber being formed on an opposed side of said first housing wall, and a cooling air path for supplying air across a surface of the thrust bearing, and between said member and said first housing wall, said first housing wall having a communication hole for communicating cooling air from the cooling air path into said hollow chamber to drive air within said hollow chamber.2. The air machine as set forth in claim 1 , wherein a downstream use ...

Electric centrifugal compressor for vehicles

A compact electric centrifugal compressor particularly suitable for a heat ventilation air conditioning system for vehicles provides a motor portion ( 20 ) and a centrifugal compressor portion ( 10 ) driven by the motor portion ( 20 ) through a shaft ( 15 ). The motor portion includes first and second radial bearingless motors ( 140, 150 ). An active axial magnetic bearing or an axial bearingless motor ( 130 ) is located between the first and second radial bearingless motors ( 140, 150 ). The motor portion is further equipped with auxiliary landing bearings ( 8 ).

Turbocharger system with reduced thrust load

An exemplary compressor is provided. The compressor includes a plurality of blades, a hub defining a front surface and a back surface, and a first flow restriction structure provided at the back surface of the hub. The plurality of blades are arranged in a predefined manner on the front surface for receiving input air flow at a first pressure and compressing the input air flow to provide an output air flow at a second pressure higher than the first pressure. The first flow restriction member is configured for preventing at least a portion of the output air flow at the second pressure from entering into the back surface of the hub to reduce an air pressure at the back surface of the hub.

Cryogenic Liquid Rotary Machinery

An improvement for a turbine generator or pump having main bearings separated by a span of shaft and a thrust equalizing mechanism adjacent one of said main bearings, the improvement comprising a stationary length compensator interposed between the thrust equalizing mechanism and its adjacent main bearing to reduce the span between said main bearings. Preferably the length compensator is composed of material that shrinks less than the shaft of the generator, and the height of the length compensator, i.e., the compensating dimension, is selected according to desired thrust equalizing mechanism operating parameters over a temperature range. 1. For cryogenic liquid rotary machinery in a vertical orientation with vertical rotational axis having product-lubricated main bearings separated by a span of shaft and a thrust equalizing mechanism which includes a stationary thrust plate adjacent one of the main bearings and a variable orifice defined between the thrust plate and a throttle plate affixed to the shaft , an improvement comprising a stationary length compensator interposed between the thrust plate and its adjacent main bearing to space said adjacent main bearing from the thrust plate in order to reduce the span between said main bearings , wherein the stationary length compensator is composed of material having low thermal linear contraction such that the stationary length compensator shrinks less than the shaft of the rotary machinery , the height of the length compensator selected such that it is operative between 70 K and 140 K , the operating temperature range of the cryogenic liquid rotary machinery.2. The cryogenic liquid rotary machinery of in which the rotary machinery is a turbine generator.3. The cryogenic liquid rotary machinery of in which the rotary machinery is a pump.4. The cryogenic liquid rotary machinery of in which the stationary length compensator is composed of material having less than 1% of thermal linear contraction.5. For cryogenic liquid ...

Pressure generating device

A pressure generating device ( 1 ), such as a boost pressure generator of an internal combustion engine, includes a housing ( 2 ), in which a rotor ( 3 ) is axially and radially supported by a bearing assembly ( 5 ). A gap ( 4 ) extends in the radial direction ( 4 ) between the housing ( 2 ) and the rotor ( 3 ) at at least one axial position of the rotor ( 3 ). In order to ensure a minimal and constant gap between the housing and the rotor, an axial bearing ( 5′ ) is provided exclusively for supporting axial forces.

COMPACT FAN ASSEMBLY WITH THRUST BEARING

A fan assembly for a computing device is disclosed. The device can include an impeller having a number of blades and a motor for turning the blades. The motor can turn the blades via a magnetic interaction between the impeller and the motor. A fluid dynamic thrust bearing can be used to control a position of the impeller relative to the motor. In particular, the impeller can be configured to rotate around an axis and the thrust bearing can be used to control movement of the impeller in a direction aligned with the rotational axis. In one embodiment, the thrust bearing can be configured to stabilize the impeller when vibratory forces act upon the fan assembly. More particularly, parameters associated with the thrust bearing can be selected to counteract vibratory forces emitted by a speaker system. 1. A computer system , comprising:an enclosure;a vibration source disposed within the enclosure; and a housing, and', 'a rotational fan assembly disposed within the housing, the rotational fan assembly comprising a thrust bearing comprising at least one grooved fluid dynamic bearing, wherein the thrust bearing is configured to limit relative axial motion between the rotational fan assembly and the housing., 'a cooling assembly disposed within the enclosure, comprising2. The computer system as recited in claim 1 , wherein the rotational fan assembly comprises two grooved fluid dynamic bearings acting in opposing axial directions.3. The computer system as recited in claim 1 , wherein the cooling assembly is a mixed flow fan configured to exhaust air having both centrifugal and axial components.4. The computer system as recited in claim 1 , wherein the vibration source is a speaker system.5. The computer system as recited in claim 1 , wherein the cooling fan is a centrifugal flow fan.6. The computer system as recited in claim 1 , wherein the thrust bearing includes a single magnetically preloaded grooved fluid dynamic bearing.7. The computer system as recited in claim 6 , ...

CENTRIFUGAL COMPRESSOR

Disclosed is a centrifugal compressor having improved operation performance to improve durability. The centrifugal compressor includes an impeller connected to a rotary shaft and configured to radially eject a fluid suctioned in an axial direction upon rotation thereof; a shroud configured to cover front and rear sides of the impeller and having a suction port formed to face one surface of the impeller at a center of one side thereof; a volute chamber formed at an outer periphery of the shroud in a circumferential direction thereof and configured to guide the fluid ejected by the impeller to an ejection port; and a regulator installed at one side of the shroud and configured to selectively communicate a space formed at the other surface of the impeller with the outside. 1. A centrifugal compressor comprising:a rotary shaft having a main flow path formed therein in an axial direction thereof to be rotated;an impeller connected to a first end of the rotary shaft, and configured to suction a fluid in an axial direction and eject the fluid in a radial direction;a thrust bearing disk having a thrust cooling flow path formed therein in the radial direction, and integrally formed with a second end of the rotary shaft to keep a rotation balance with the impeller; anda gas bearing including a radial bearing and a thrust bearing disposed at the rotary shaft and an outer surface of the thrust bearing disk, wherein an air gap is formed to support a rotating load.2. The centrifugal compressor according to claim 1 , wherein the thrust cooling flow path is branched at least once in a circumferential direction of the thrust bearing disk claim 1 , and having an inner end in communication with the main flow path and an outer end formed to pass through the gas bearing.3. The centrifugal compressor according to claim 2 , wherein the main flow path is in communication with a through-hole of the thrust bearing installed to pass through the second end of the rotary shaft in a ...

Axial bearing for an electric drive

The invention relates to an axial bearing for retaining a rotor on a shaft of an electric drive. The axial bearing has a multi-sided outer contour.

BALANCE PISTON WITH A SEALING MEMBER

A balance piston for a compressor is provided. The balance piston may include an annular body and a seal extending from an axial surface of the annular body. The annular body may be configured to be disposed about and coupled with a rotary shaft of the compressor. The seal may be configured to form a sealing engagement with at least one component of the compressor to prevent a flow of a process fluid from an impeller of the compressor to a seal cavity of the compressor. 1. A balance piston for a compressor , comprising:an annular body configured to be disposed about and coupled with a rotary shaft of the compressor; anda seal extending from an axial surface of the annular body and configured to form a sealing engagement with at least one component of the compressor to prevent a flow of a process fluid from an impeller of the compressor to a seal cavity of the compressor.2. The balance piston of claim 1 , wherein the annular body is integral with an impeller of the compressor.3. The balance piston of claim 1 , wherein the seal comprises a protrusion extending from the axial surface of the annular body.4. The balance piston of claim 3 , wherein the protrusion is configured to form a sealing engagement with a shaft seal assembly of the compressor to prevent the flow of the process fluid from the impeller to the seal cavity.5. The compressor of claim 4 , wherein the protrusion is configured to form the sealing engagement with a labyrinth seal of the shaft seal assembly.6. The compressor of claim 5 , wherein the protrusion and the labyrinth seal define a tortuous path therebetween.7. The compressor of claim 3 , wherein the protrusion extends annularly about the axial surface of the annular body.8. The compressor of claim 3 , wherein an inner radial surface and an outer radial surface of the protrusion are substantially parallel with one another.9. The compressor of claim 3 , wherein an inner radial surface of the protrusion is arcuate.10. The compressor of claim 3 , ...

BEARING DEVICE FOR TURBOCHARGER, AND TURBOCHARGER

A bearing device for a turbocharger according to one embodiment of the present invention includes: a rotational shaft; a journal bearing device including a compressor-side journal bearing and a turbine-side journal bearing; a bearing housing including a compressor-side bearing supporting portion, a turbine-side bearing supporting portion, and a bearing housing main body; and a lubricant oil guide member extending along a circumference direction of the rotational shaft, at an outer circumference side of at least one of the compressor-side bearing supporting portion and the turbine-side bearing supporting portion. When a virtual line extending vertically downward from a rotational center CL of the rotational shaft is defined as a reference line VL in a state where an oil discharge port is orientated downward, the lubricant oil guide member extends from the reference line VL along the circumference direction toward each of one side and another side of the reference line VL over a predetermined angle θ about the rotational center CL of the rotational shaft. 1. A bearing device for a turbocharger , the bearing device comprising:a rotational shaft having one end side and another end side provided with a compressor wheel and a turbine wheel, respectively; a compressor-side journal bearing rotatably supporting the rotational shaft; and', 'a turbine-side journal bearing disposed closer to the turbine wheel than the compressor-side journal bearing and rotatably supporting the rotational shaft;, 'a journal bearing device including a compressor-side bearing supporting portion having on an inner circumference side thereof a supporting surface supporting the compressor-side journal bearing;', 'a turbine-side bearing supporting portion having on an inner circumference side thereof a supporting surface supporting the turbine-side journal bearing, the turbine-side bearing supporting portion being disposed to be separated from the compressor-side bearing supporting portion; and', an ...

Thrust magnetic bearing and turbo compressor equipped with same

A thrust magnetic bearing includes a stator having a coil that produces a magnetic flux, and a rotor. The magnetic flux supports the rotor in a non-contact manner. The stator has main and auxiliary stator magnetic pole surfaces. The rotor has main and auxiliary rotor magnetic pole surfaces. The main and auxiliary rotor magnetic pole surfaces face the main and auxiliary stator magnetic pole surfaces. The auxiliary stator magnetic pole surface includes at least one first stator surface and at least one second stator surface, alternately arranged. The auxiliary rotor magnetic pole surface includes at least one first rotor surface, and at least one second rotor surface, alternately arranged. Nr≥1 and Nt≥2, with Nr representing a number of pairs of the first stator and rotor surfaces facing each other, and Nt representing a number of pairs of the second stator and rotor surfaces facing each other.

AIR FOIL BEARING

Disclosed herein is an air foil bearing capable of adjusting stiffness of single bumps by varying widths of the single bumps. Since the bumps have the same height in an initial stage, a wedging effect is implemented only when a load is applied thereto by an oil film. Therefore, the air foil bearing is advantageous in terms of height management thereof. In addition, it is possible to stably dampen shocks applied in the direction of rotation of a rotor, to improve a support capability, and to reduce shocks due to damping. Therefore, it is possible to enhance durability of the air foil bearing. 1. An air foil bearing for rotatably supporting a rotary shaft , comprising: 'wherein each of the bump foils comprises a plurality of foils extending from the coupled ends, and', 'a disc-shaped plate, a plurality of bump foils coupled to the plate, and a top foil disposed above each of the bump foils while one end of the top foil is coupled to the plate and the other end thereof is a free end,'}wherein a leading ridge (A) of each of the plurality of foils, which is adjacent to the free end, has a height different from another adjacent bump ridge.2. The air foil bearing according to claim 1 , wherein the bump foil is divided into first to fourth foils disposed radially from inside to outside by a plurality of slits.3. The air foil bearing according to claim 2 , wherein stiffness of the first to fourth foils is adjusted according to a width of each of the slits and a bump width of the bump foil.4. The air foil bearing according to claim 3 , wherein some of the first to fourth foils have different bump widths from one end thereof to the other end thereof.5. The air foil bearing according to claim 1 , wherein stiffness of the plurality of the foils increases from radially inside to outside.6. The air foil bearing according to claim 2 , wherein the plurality of slits have different shapes.7. An air foil bearing for rotatably supporting a rotary shaft claim 2 , comprising: 'wherein ...

ELECTRICALLY HEATED BALANCE PISTON SEAL

A balance piston seal assembly for a balance piston of a compressor is provided. The balance piston seal assembly may include a balance piston seal configured to be disposed about the balance piston such that an inner radial surface of the balance piston seal and an outer radial surface of the balance piston define a radial clearance therebetween. The balance piston seal assembly may also include a plurality of heaters in thermal communication with the balance piston seal and configured to heat and thermally expand the balance piston seal and thereby increase a radial length of the radial clearance. 1. A balance piston seal assembly for a balance piston of a compressor , comprising:a balance piston seal configured to be disposed about the balance piston such that an inner radial surface of the balance piston seal and an outer radial surface of the balance piston define a radial clearance therebetween; anda plurality of heaters in thermal communication with the balance piston seal and configured to heat and thermally expand the balance piston seal and thereby increase a radial length of the radial clearance.2. The balance piston seal assembly of claim 1 , wherein the balance piston seal defines a plurality of bores at least partially extending therethrough from a first axial end surface toward a second axial end surface thereof.3. The balance piston seal assembly of claim 2 , wherein each heater of the plurality of heaters is disposed in a respective bore of the plurality of bores.4. The balance piston seal assembly of claim 3 , wherein the plurality of bores and the respective heaters disposed therein are circumferentially spaced about the balance piston seal at substantially equal intervals.5. The balance piston seal assembly of claim 3 , wherein the plurality of bores and the respective heaters disposed therein are circumferentially spaced about the balance piston seal at varying intervals.6. The balance piston seal assembly of claim 1 , wherein each heater of the ...

TURBOMACHINE FOR COMPRESSING A FLUID

A turbomachine for use as a compressor has a tubular housing centered on an axis, a rotor at least generally centered on the axis in the housing, and bearings supporting the rotor in the housing for rotation about the axis. The rotor is formed by a small-diameter shaft extending along and centered on the axis, formed with at least one mounting collar, and carried by the bearings, and by a plurality of annular disks fitted axially together and formed with radially outwardly extending vanes. At least one of the disks is fitted with and secured to the mounting collar. 2. The turbomachine defined in claim 1 , wherein the shaft is formed with two of the collars offset axially from each other and each fitted with a respective one of the disks.3. The turbomachine defined in claim 2 , wherein the disks between the disks fitted to the collars are out of engagement with the shaft.4. The turbomachine defined in claim 2 , wherein the collars are axially between the bearings.5. The turbomachine defined in claim 4 , wherein the bearings include two magnetic axial-thrust bearings and two magnetic radial-thrust bearings.6. The turbomachine defined in claim 1 , the vanes are constructed to advance a fluid axially through the housing on rotation of the rotor.7. The turbomachine defined in claim 1 , wherein the disks have end flanges forming axially and radially directed annular surfaces that fit complementarily together between adjacent disks.8. The turbomachine defined in claim 1 , wherein the disks have between the respective vanes outer surfaces centered on the axis and of different diameters from disk to disk.9. The turbomachine defined in claim 8 , wherein the outer surfaces are flush with one another and form a frustocone centered on the axis.10. The turbomachine defined in claim 1 , wherein at least one of the bearings is a magnetic bearing.11. The turbomachine defined in claim 1 , wherein at least one of the bearings is a hydrodynamic bearing.12. The turbomachine defined in ...

Turbocharger Compressor Oil Deflector and Method

A turbocharger includes a two-piece thrust collar that includes inner and outer portions disposed around a rotatable shaft. The inner portion is engaged with a bushing disposed in and connected to the center housing by a retainer. The outer portion is disposed adjacent the inner portion along the rotatable shaft and connected to the rotatable shaft such that it rotates therewith. The outer portion forms an annular channel that extends in a radial direction relative to the rotatable shaft and peripherally around the shaft. An oil deflector is connected to the compressor back-plate and includes a base flange and a raised portion disposed at least partially over the annular channel. 1. A turbocharger , comprising:a turbine;a center housing connected to the turbine, the center housing forming at least one oil passage and an oil collection gallery therein;a compressor back-plate connected to the center housing;a rotatable shaft extending through the center housing and the compressor back-plate;at least one bushing disposed within the center housing and configured to rotatably support the rotatable shaft, the bushing being in fluid communication with the at least one oil passage and the collection gallery such that, during operation, oil flowing through the at least one passage flows over and through the at least one bushing and collects in the oil collection gallery;a thrust collar disposed around the rotatable shaft, the thrust collar engaged with the at least one bushing and connected to the center housing by a retainer, the thrust collar configured to rotate with the rotatable shaft when the rotatable shaft rotates, the thrust collar accommodating at least one radial seal that sealably and rotatably engages a shaft bore formed in the compressor back-plate through which the rotatable shaft extends, the thrust collar further forming an annular channel adjacent the back-plate that extends in a radial direction relative to the rotatable shaft, the annular channel ...

VARIABLE PRELOADED DUPLEX THRUST BEARING SYSTEM FOR A GEARED TURBOFAN ENGINE

A bearing system for a gas turbine engine includes an outer housing and a first ball bearing assembly disposed radially inward from the outer housing relative a center axis of the outer housing. The bearing system also includes a second ball bearing assembly disposed radially inward from the outer housing and positioned axially aft of the first ball bearing assembly. The bearing system also includes a resilient member that is connected to the outer housing and compressed against at least one of a first outer race of the first ball bearing assembly and a second outer race of the second ball bearing assembly in an axial direction parallel to the center axis. 1. A bearing system for a gas turbine engine comprises:an outer housing comprising a forward end and an aft end; a first outer race disposed radially inward from the outer housing;', 'a first inner race disposed radially inward from the first outer race; and', 'a first plurality of ball bearing elements disposed between the first outer race and the first inner race;, 'a first ball bearing assembly disposed radially inward from the outer housing relative a center axis of the outer housing, wherein the first ball bearing assembly comprises a second outer race disposed radially inward from the outer housing;', 'a second inner race disposed radially inward from the second outer race; and', 'a second plurality of ball bearing elements disposed between the second outer race and the second inner race;, 'a second ball bearing assembly disposed radially inward from the outer housing and positioned axially aft of the first ball bearing assembly, wherein the second ball bearing assembly comprises a flange that extends radially relative the center axis;', 'a body that extends axially parallel to the center axis; and', 'a curved bow disposed radially inward from the flange and the body and connecting the flange to the body., 'a resilient member connected to the outer housing, wherein the resilient member is compressed against ...

TURBINE ENGINE EJECTOR THROAT CONTROL

An apparatus and method for providing a pressurized air supply to a balance piston assembly to balance an axial load on a gas turbine engine compressor. The pressurized air supply can be supplied by mixing valve mixing a primary and secondary pressure bleed air supply relative to feedback received from the balance piston assembly to maintain a predetermined pressure at the balance piston assembly. 1. A turbine engine comprising:a drive shaft;a compressor section mounted to the drive shaft;a turbine section mounted to the drive shaft aft of the compressor section;a bearing abutting the compressor section;a pressure-operated balance piston assembly applying an axial force to the compressor section to urge the compressor section axially forward to reduce an axial load on the bearing; andan air-pressure supply comprising a primary bleed air supply fluidly coupled to a first portion of the compressor having a first pressure, a secondary bleed air supply fluidly coupled to a second portion of the compressor having a second pressure lower than the first pressure, a mixed air supply fluidly coupled to the pressure-operated balance piston assembly having a third pressure, and a mixing valve proportionally coupling the primary and secondary bleed air supplies to the mixed air supply in response to first, second, and third pressures to maintain a predetermined third pressure.2. The turbine engine as claimed in wherein the third pressure is maintained within a predetermined range.3. The turbine engine as claimed in wherein air-pressure supply comprises an ejector having a secondary conduit extending from the second portion to the pressure-operated balance piston assembly claim 1 , and a primary conduit having an outlet located within the secondary conduit.4. The turbine engine as claimed in comprising a variable area ejector throat defining the outlet.5. The turbine engine as claimed in wherein the variable area ejector throat comprises at least one movable portion having a ...

ELECTRIC MOTOR FOR A FLUID CIRCULATOR

The invention relates to an improved electric motor for a fluid circulator comprising a permanent magnet rotor (), a stator (), in which a supporting and containing hollow body () for the rotor () is housed, an impeller (), a shaft () of the electric motor kinematically coupled to the rotor () and to the impeller () for activating the impeller () in rotation. Advantageously, the rotor () comprises an axial thrust bearing member (), made of anti-friction material and adapted for supporting axil loads produced during the fluid circulation in the circulator, said thrust bearing member being integrated inside the rotor itself, so that the thrust bearing member does not separate from the rotor during a motor disassembly. 1. An electric motor for a circulator pump comprising{'b': '2', 'a permanent magnet rotor (),'}{'b': '3', 'a stator (),'}{'b': 4', '2, 'a supporting and containing hollow body () for the rotor () located centrally of the stator;'}{'b': '5', 'an impeller ();'}{'b': 6', '2', '5', '2', '5, 'a shaft () firmly coupled at one end to the rotor () and at a second end to the impeller (), such that rotation of the rotor () activates the impeller () to rotate;'}{'b': 2', '7', '10, 'said rotor () comprising an axial thrust bearing member (; ) made of anti-friction material and adapted for supporting axial loads that would otherwise cause the rotor and the shaft to move towards the impeller end of the circulator, the axial loads are produced during the fluid circulation in the circulator during rotation of the impeller;'}said thrust bearing member being integrated inside the rotor itself, so that the thrust bearing member does not separate from the rotor during a motor disassembly and is so integrated that it cannot move axially relative to the shaft and the rotor; the thrust bearing member rotates together with the rotor and the shaft, without slip; the electric motor further comprising:{'b': 20', '2', '5', '20', '2, 'a bushing bearing () interposed between the ...

THRUST BEARING AS A SEAL

A porous media ventless thrust bearing seal is disclosed. The porous media thrust bearing may include a primary porous media thrust bearing also serving as a seal ring including porous media positioned over a plenum and a port connected to the plenum, and conductive passages for communicating pressurized fluid to the plenums through the ports of the primary ring. The porous media ventless thrust bearing may also include a treated process gas supplied to a port which is closest to the untreated process gas, at a pressure which is higher than the untreated process gas. An inert gas (or fluid in a liquid state) may be supplied to the remaining port, at a pressure which is the same as the untreated process gas. A certain amount of treated process gas may flow into the untreated process gas, and may prevent the untreated gas from entering the porous media seal. 1. A rotating equipment comprising:an assembly having a first end and a second end, wherein the second end is configured to prevent leakage of a process side gas;a rotating shaft entering the assembly at the first end; andan externally pressurized thrust bearing configured to support the rotating shaft and to seal the process side gas inside the assembly at the first end.2. The rotating equipment of wherein the second end of the assembly is capped.3. The rotating equipment of wherein the externally pressurized thrust bearing is a ventless seal.4. The rotating equipment of wherein in no additional shaft seals are required.5. The rotating equipment of further comprising radial bearings claim 1 , wherein the radial bearings are externally pressurized gas bearings.6. The rotating equipment of wherein the externally pressurized thrust bearing is configured to serve as a balance piston and wherein the externally pressurized thrust bearing further comprises four porous media rings positioned over a plurality of plenums and having conductive passages for communicating pressurized gas to the plurality of plenums through ...

RESILIENT BEARING MOUNT WITH INTEGRAL DAMPER FLUID PASSAGE FOR A GEARED TURBOFAN ENGINE

A gas turbine engine includes a bearing support ring with a first annular body and a second annular body disposed radially inward of the first annular body. A radial spring is connected to the first annular body and the second annular body. The gas turbine engine includes a frame with a case that extends around the first annular body. The frame includes an annular member connected to the case and positioned radially between the radial spring and the second annular body. A fluid port extends radially through the annular member. A seal is disposed around the annular member and forward of the fluid port. A first fluid passage extends through the case. A second fluid passage is formed between the bearing support ring and the frame and extends from the first fluid passage to the fluid port. A bearing outer race is disposed inward of the second annular body. 1. A gas turbine engine comprises: a first annular body;', 'a second annular body disposed radially inward of the first annular body relative a center axis of the gas turbine engine; and', 'a radial spring connected to the first annular body and the second annular body, wherein the radial spring extends circumferentially about the center axis and extends radially between the first annular body and the second annular body;, 'a bearing support ring, wherein the bearing support ring comprises a case extending circumferentially around the first annular body of the bearing support ring;', 'an annular member connected to the case and positioned radially between the radial spring and the second annular body of the bearing support ring, wherein the annular member extends circumferentially around the second annular body; and', 'a fluid port extending radially through the annular member;, 'a frame comprising;'}a seal disposed around the annular member of the frame, disposed axially forward of the fluid port, and extending radially between the annular member and the radial spring of the bearing support ring;a first fluid passage ...

CENTRIFUGAL COMPRESSOR

A centrifugal compressor includes a rotary shaft, an electric motor, which has a rotor, a tubular boss, through which the rotary shaft extends, and a radial bearing. The rotor has a rotor end face, which is an end face in an axial direction of the rotary shaft. The boss has a boss end face, which is an end face in the axial direction of the rotary shaft. The rotor end face and the boss end face face each other in the axial direction of the rotary shaft. A thrust bearing is arranged between the rotor end face and the boss end face to receive thrust force generated by rotation of the impeller. 1. A centrifugal compressor comprising:a rotary shaft;an electric motor, which includes a rotor attached to the rotary shaft and rotates the rotary shaft;an impeller, which rotates as the rotary shaft rotates, thereby compressing fluid;a housing, which accommodates the rotary shaft, the electric motor, and the impeller;a tubular boss, which is provided in the housing and through which the rotary shaft extends; anda radial bearing, which is provided between the boss and the rotary shaft and rotationally supports the rotary shaft, whereinthe rotor has a rotor end face, which is an end face in an axial direction of the rotary shaft,the boss has a boss end face, which is an end face in the axial direction of the rotary shaft,the rotor end face and the boss end face face each other in the axial direction of the rotary shaft, andthe centrifugal compressor comprises a thrust bearing, which is arranged between the rotor end face and the boss end face and receives thrust force generated by rotation of the impeller.2. The centrifugal compressor according to claim 1 , whereinthe boss is a first boss,the centrifugal compressor further comprises a second boss, which makes a pair with the first boss,the first boss and the second boss are arranged to face each other in the axial direction of the rotary shaft with the rotor in between,the rotor has a first rotor end face as the rotor end face ...

TURBO COMPRESSOR AND TURBO CHILLER USING SAME

The purpose of the present invention is to provide: a turbo compressor which is provided with an open impeller and has the minimal gap between the shroud and the impeller such that efficiency is improved and the safe operating region is enlarged; and a turbo chiller using the same. The turbo compressor is provided with an open impeller with a shroud provided on the side of a casing, and the rotary shaft is supported by a radial magnetic bearing and a magnetic thrust bearing. The turbo compressor is provided with a control unit that comprises: a load calculating means that calculates the axial thrust load generated by the pressure distribution of the compressor; and an axial support position control means that controls a gap between the impeller and the shroud to be a target gap by varying, on the basis of the axial thrust load, the axial support position of the rotary shaft due to the magnetic thrust bearing. 17-. (canceled)8. A turbo compressor comprising:an open impeller with a shroud provided on a casing side;a rotary shaft which is supported by a radial magnetic bearing and a thrust magnetic bearing; and load calculating means for calculating an axial direction thrust load generated by a pressure distribution of the compressor, and', {'b': 1', '2', '1, 'axial direction support position controlling means for controlling a gap between the impeller and the shroud to at least two different target gaps including a minimum gap S and a gap S which is greater than the gap S by changing an axial direction support position of the rotary shaft determined by the thrust magnetic bearing on the basis of the axial direction thrust load.'}], 'a controller which includes'}9. The turbo compressor according to claim 8 ,{'b': 1', '2', '1, 'wherein the axial direction support position controlling means has a function of, when an operation condition in which the axial direction thrust load is rapidly changed is detected, correcting and controlling the axial direction support position ...

Load Bearing Direct Drive Fan System With Variable Process Control

The present invention is directed to a load bearing direct-drive system for driving a fan in a cooling system such as a wet-cooling tower, air-cooled heat exchanger, HVAC system, hybrid cooling tower, mechanical tower or chiller system. The present invention includes a variable process control system that is based on the integration of key features and characteristics such as tower thermal performance, fan speed and airflow, motor torque, fan pitch, fan speed, fan aerodynamic properties, and pump flow. The variable process control system processes feedback signals from multiple locations in order to control a high torque, low variable speed, load bearing motor to drive the fan. 1. A heating ventilation and air-conditioning system (HVAC) comprising:a condenser coil;a fan;a variable speed, load bearing permanent magnet motor comprising a casing having an interior, a stator and rotor located in the interior of the casing for creating flux, and a rotatable shaft connected to the fan, the motor comprising a bearing system for bearing fan loads and enabling the variable speed, load bearing motor to rotate the fan in a forward direction or reverse direction, wherein rotation of the fan causes air-flow through the condenser coil, the bearing system comprising a spherical roller thrust bearing for absorbing the thrust loads resulting from the weight of the fan and the airflow produced by rotation of the fan, a cylindrical roller bearing for opposing the radial loads at the thrust end of the rotatable shaft, and a tapered roller output bearing for opposing the reverse thrust loads resulting from reverse rotation of the fan and yaw loads; anda device to generate electrical signals that cause rotation of the rotatable shaft of the motor in order to rotate the fan.2. The heating ventilation and air-conditioning system according to further comprising a first bearing housing for housing the tapered roller output bearing and a second bearing housing for housing the cylindrical ...

AXIAL THRUST BALANCING DEVICE

An axial thrust balancing mechanism for a rotating shaft apparatus such as a rotary pump provides self-regulating thrust compensation while avoiding contact and wear between rotating and static elements. A rotor fixed to the shaft includes a cylindrical male section proximal to but not extending within a cylindrical female section of a non-rotating stator, such that a gap formed therebetween is varied in width by shaft displacements caused by axial thrusts. Pressurized fluid within the female section applies a thrust-compensating force to the rotor that is controlled by the gap size. The female section is larger in diameter than the male section, thereby preventing any contact therebetween. The disclosed mechanism can be combined with a thrust-compensating drum so as to reduce the thrust to a residual level that can be regulated. The rotor and stator can be stepwise varied to provide a plurality of gaps and intermediate chambers therebetween. 1. A thrust regulating mechanism for an apparatus having a shaft that is subject to an axial displacement caused by an axial thrust , the mechanism comprising:a first segment that is longitudinally fixed to and coaxial with the rotatable shaft, and a second segment that surrounds but is not longitudinally fixed to the shaft, the first and second segments being configured such that there is a relative rotation therebetween during operation of the apparatus, the second segment being in fluid communication with a high pressure fluid region; anda cylindrical male section included on one of the first and second segments, and a cylindrical female section included on the other of the first and second segments, the male section being terminated by a circular leading edge and the female section being terminated at a front edge thereof by a circular opening that is larger in diameter than circular leading edge of the male section,the leading edge of the male section being proximal to the front edge of the female section without entering ...

VENTILATION FAN HAVING AIR BEARING SYSTEM

A ventilation fan includes a shaft assembly, a rotor, a motor housing, and a bearing housing. The shaft assembly defines a first port and a second port. The rotor has a rotor first portion disposed about a first portion of the shaft assembly and a rotor second portion that extends from the rotor first portion. The rotor first portion defines a rotor port. The motor housing is disposed about a second portion of the shaft assembly. The motor housing defines a housing port. The bearing housing is operatively connected to the motor housing. The bearing housing is disposed about a third portion of the shaft assembly. 1. A ventilation fan , comprising:a shaft assembly extending along an axis and disposed within a housing assembly, the shaft assembly including a first shaft having a first shaft first portion, defining a first port, and a first shaft second portion, defining a second port, operatively connected to a second shaft having a second shaft first portion, defining a third port, and a second shaft second portion;a rotor having a rotor first portion disposed about the first shaft first portion and a rotor second portion extending from the rotor first portion, the rotor first portion defining a rotor port;a motor housing disposed about the first shaft second portion, the motor housing having a housing arm, a housing leg extending from the housing arm, a housing extension extending from the housing leg, and a vane platform extending from the housing extension;a first opening being defined between respective ends of the rotor second portion and the vane platform; anda bearing housing operatively connected to the motor housing and disposed about the second shaft second portion, the bearing housing having a bearing arm, a bearing leg extending from the bearing arm, and a bearing extension extending from the bearing leg.2. The ventilation fan of claim 1 , further comprising:a first journal air bearing that rotatably supports the shaft assembly, the first journal air ...

VENTILATION FAN HAVING A HYBRID BEARING SYSTEM

A ventilation fan includes a shaft, a rotor, a motor housing, a bearing housing, and an air bearing. The shaft has a shaft body that extends between a first shaft end and a second shaft end. The shaft body defines a first port and a bore. The rotor is disposed about the shaft. The motor housing is disposed about the shaft and is axially spaced apart from the rotor. The bearing housing is disposed about the shaft. The air bearing is disposed proximate the second shaft end and is disposed between the bearing arm and the second shaft end. 1. A ventilation fan , comprising:a shaft having a shaft body extending between a first shaft end and a second shaft end, the shaft body defining a first port and a bore;a rotor disposed about the shaft;a motor housing disposed about the shaft and axially spaced apart from the rotor, the motor housing having a mounting portion, a housing extension extending from the mounting portion, and a vane platform extending from the housing extension;a bearing housing disposed about the shaft, the bearing housing having a bearing arm, a bearing leg extending from the bearing arm, and a bearing extension extending from the bearing leg and operatively connected to the housing extension; andan air bearing disposed proximate the second shaft end and disposed between the bearing arm and the second shaft end.2. The ventilation fan of claim 1 , wherein the shaft body defines an exhaust port that is disposed proximate the first shaft end.3. The ventilation fan of claim 2 , wherein the air bearing rotatably supports the shaft.4. The ventilation fan of claim 3 , wherein an inner surface of the air bearing and an outer surface of the shaft define an air bearing flow path.5. The ventilation fan of claim 4 , wherein the bearing housing defines a bearing opening.6. The ventilation fan of claim 5 , wherein the bearing opening is in fluid communication with the air bearing flow path claim 5 , the first port claim 5 , the bore claim 5 , and the exhaust port to ...

THRUST BEARING ASSEMBLY INCLUDING LINED BEARING SURFACES

A turbocharger () includes compressor and turbine wheels () and a shaft () that connects the compressor wheel () to the turbine wheel (). The shaft () is supported by a thrust bearing assembly () that includes a pair of thrust washers () mounted on the shaft (), a hollow, cylindrical spacer () disposed on the shaft () between and abutting first faces () of the thrust washers (), and a thrust bearing () supported on the spacer () between the thrust washers (). One of the thrust bearing () or the first and second thrust washers () includes a copper-alloy lining () where the lining () is provided in a first region () and in a second region (), and the remainder of the thrust bearing () or the first and second thrust washers () is lining free. 1. A washer formed of a first material , the washer comprisinga first face,a second face opposed to the first face,a peripheral edge extending between the first face and the second face along a circumference of the washer, anda through-opening surrounded by the peripheral edge and defining an inner edge, whereinthe first face includes a lining of a second material that is different from the first material, andthe second face is free of a lining of the second material.2. The washer of wherein the lining extends between the peripheral edge and an annular claim 1 , lining-free region that adjoins the inner edge.3. The washer of wherein{'b': '1', 'the peripheral edge has a radius of r,'}{'b': '2', 'the lining-free region has a radius of r,'}{'b': 2', '1, 'r is less than r,'}{'b': '3', 'the inner edge has a radius of r,'}{'b': 3', '2, 'r is less than r, and'}{'b': 1', '2', '2', '3, '(r−r) is approximately 3*(r−r).'}4. The washer of wherein the second material is softer than the first material and has a lower coefficient of friction than the first material.5. A thrust bearing formed of a first material claim 1 , the thrust bearing comprisinga first face,a second face opposed to the first face,a peripheral edge extending between the ...

TURBOCHARGER

A turbocharger includes: a bearing provided in a turbocharger body, and configured to rotatably support a turbine shaft in an insertion hole formed in the bearing; and an opposing portion which faces an end surface of the bearing in an axial direction of the turbine shaft. An end-surface guide portion is provided to any one of an opposing surface of the bearing which faces the opposing portion, and an opposing surface of the opposing portion which faces the bearing. The end-surface guide portion configured to make the insertion hole and an outer peripheral edge of the end surface of the bearing in radial directions of the turbine shaft communicate with each other extends forward in a rotational direction of the turbine shaft from a part of the end surface of the bearing which communicates with the insertion hole. 1. A turbocharger comprising:a turbocharger body;a turbine shaft rotatably housed in the turbocharger body with a turbine impeller provided to one end of the turbine shaft and a compressor impeller provided to an opposite end of the turbine shaft;a bearing provided in the turbocharger body and configured to rotatably support the turbine shaft in an insertion hole formed in the bearing; andan opposing portion facing an end surface of the bearing in an axial direction of the turbine shaft, whereinan end-surface guide portion configured to make the insertion hole and an outer peripheral edge of the end surface of the bearing in radial directions of the turbine shaft communicate with each other is provided to any one of an opposing surface of the bearing which faces the opposing portion, and an opposing surface of the opposing portion which faces the bearing, andthe end-surface guide portion extends forward in a rotational direction of the turbine shaft from a part of the end surface of the bearing which communicates with the insertion hole.2. The turbocharger according to claim 1 , whereinthe end-surface guide portion forms a passage configured to discharge a ...

CENTRIFUGAL COMPRESSOR

A centrifugal compressor includes a casing, a first compression mechanism and a second compression mechanism. The casing has a first inlet portion, a first outlet portion, a second inlet portion and a second outlet portion. The first compression mechanism includes a first inlet guide vane disposed in the first inlet portion, a first impeller disposed downstream of the first inlet guide vane, a first diffuser disposed in the first outlet portion downstream from the first impeller, and a first motor. The second compression mechanism includes a second inlet guide vane disposed in the second inlet portion, a second impeller disposed downstream of the second inlet guide vane, a second diffuser disposed in the second outlet portion downstream from the second impeller, and a second motor. The first and second motors are arranged to rotate first and second shafts in order to rotate the first and second impellers. 1. A centrifugal compressor comprising:a casing having a first inlet portion, a first outlet portion, a second inlet portion and a second outlet portion; a first inlet guide vane disposed in the first inlet portion,', 'a first impeller disposed downstream of the first inlet guide vane, the first impeller being attached to a first shaft rotatable about a first rotation axis,', 'a first diffuser disposed in the first outlet portion downstream from the first impeller, and', 'a first motor arranged to rotate the first shaft in order to rotate the first impeller; and, 'a first compression mechanism including'} a second inlet guide vane disposed in the second inlet portion,', 'a second impeller disposed downstream of the second inlet guide vane, the second impeller being attached to a second shaft rotatable about a second rotation axis,', 'a second diffuser disposed in the second outlet portion downstream from the second impeller, and', 'a second motor arranged to rotate the second shaft in order to rotate the second impeller., 'a second compression mechanism including'} ...

Compressor wheel-shaft assembly

A turbocharger ( 1 ) includes a compressor wheel ( 50 ) disposed in a compressor housing ( 12 ), a turbine wheel ( 40 ) disposed in a turbine housing ( 11 ), and a shaft ( 60 ) that connects the compressor wheel ( 50 ) to the turbine wheel ( 40 ). The shaft ( 60 ) includes a journal portion ( 63 ) that adjoins one end and supports journal bearings ( 7 a, 7 b ), a thrust portion ( 64 ) that adjoins the journal portion ( 63 ) that supports a thrust bearing ( 20 ), a connection portion ( 66 ) that adjoins the thrust portion ( 64 ) that has surface features ( 72 ) formed on an outer surface thereof, and a guide portion ( 69 ) that adjoins the connection portion ( 66 ). The guide portion ( 69 ) and the connection portion ( 66 ) are received within a blind bore ( 58 ) of the compressor wheel ( 50 ) and are configured to connect the shaft ( 60 ) to the compressor wheel ( 50 ).

INTEGRATED TURBOMACHINE WITH AN AXIAL LOCKING DEVICE

An integrated turbomachine is described, comprising: a casing; an electric motor and a driven turbomachine component housed in the casing; a rotating shaft drivingly connecting the electric motor and the driven turbomachine component; a thrust bearing and a radial bearing rotatingly supporting the shaft; an axial locking device housed inside the casing, for applying a thrust to the shaft, parallel to the rotation axis (A-A) of the shaft, and comprised of an actuator member, configured to selectively activate and/or deactivate the axial locking device. 1. An integrated turbomachine comprising:a casing;an electric motor housed in the casing;a driven turbomachine component housed in the casing;a rotating shaft drivingly connecting the electric motor and the driven turbomachine component, said shaft housed in the casing and having a longitudinal rotation axis (A-A);at least one thrust bearing and at least one radial bearing rotatingly supporting the shaft; andan axial locking device housed inside the casing, arranged and configured for applying a thrust to the shaft, parallel to the rotation axis (A-A) of the shaft, and comprised of an actuator member, configured to selectively activate and/or deactivate the axial locking device;wherein the actuator member comprises a cylinder-piston actuator operated by a pressurized fluid.2. The integrated turbomachine of claim 1 , wherein the axial locking device comprises a pusher controlled by said actuator member claim 1 , said pusher being substantially co-axial to the shaft.3. The integrated turbomachine of claim 1 , wherein the actuator member is arranged inside the casing and is controlled from the exterior of the casing.4. The integrated turbomachine of claim 1 , wherein the at least one radial bearing is arranged at or near an end of the shaft.5. The integrated turbomachine of claim 1 , wherein the at least one thrust bearing is arranged at or near an end of the shaft.6. The integrated turbomachine of claim 1 , wherein the ...

TURBOCHARGER THRUST BEARING AND MANUFACTURING METHOD

A thrust bearing, particularly for a turbocharger, having unique configurations on the thrust pad faces, including free-form curvatures or non-linear configurations defined by a geometric equation. The thrust pad faces can be configured by a programmed linear actuator system and cutting tool. 1. A fluid-film thrust bearing comprising:a disc member having a first surface on one side and a second surface on the opposite side from said first surface;said first surface having a plurality of thrust pad members thereon, each of said thrust pad members having an outer axial oriented surface;each of said outer surfaces having a curved profile configuration on at least a portion thereof;said curved profile configurations being defined by a non-linear geometric equation.2. The fluid-film thrust bearing as set forth in further comprising a central opening in said disc member claim 1 , wherein said disc member can be positioned on a shaft member claim 1 , and wherein said thrust pad members have a wedge-shaped configuration.3. The fluid-film thrust bearing as set forth in wherein said pad members are arranged in a circular orientation on said first surface claim 1 , and said thrust bearing is a turbocharger thrust bearing.4. The fluid-film thrust bearing as set forth in further comprising a plurality of fluid channels positioned on said first surface claim 1 , wherein a fluid can be applied to said pad members on said first surface.5. The fluid-film thrust bearing as set forth in further comprising a plurality of thrust pad members on said second surface.6. The fluid-film thrust bearing as set forth in wherein each of said thrust pad members on said second surface has a wedge-shape configuration with an outer surface having a curved profile configuration.7. The fluid-film thrust bearing as set forth in wherein said curved profile configures on the outer surfaces of said thrust pad members on said second surface is defined by the same equation defining the curved profile ...

TURBOCHARGER THRUST BEARING AND MANUFACTURING METHOD

A thrust bearing, particularly for a turbocharger, having unique configurations on the thrust pad faces, including free-form curvatures or non-linear configurations defined by a geometric equation. The thrust pad faces can be configured by a programmed linear actuator system and cutting tool. 1. A fluid-film thrust bearing for a turbocharger having a housing , a compressor wheel , a turbine wheel and a rotating elongated shaft member , said thrust bearing comprising:a one-piece disc shaped body member having a first substantially planar surface on one side and a second substantially planar surface on the opposite side from said first surface;each of said first and second surfaces oriented to face axially in the longitudinal direction of a turbocharger shaft member;said first surface having a plurality of thrust pad members thereon, each of said thrust pad members having an outer axial oriented surface thereon;each of said axially oriented outer surfaces having a curved profile configuration on at least a portion thereof;said curved profile configurations being defined by a non-linear equation.2. The fluid-film thrust bearing as set forth in further comprising a central opening in said disc member claim 1 , wherein said disc member can be positioned on a shaft member claim 1 , and wherein said thrust pad members have a wedge-shaped configuration.3. The fluid-film thrust bearing as set forth in wherein said pad members are arranged in a circular orientation on said first surface.4. The fluid-film thrust bearing as set forth in further comprising a plurality of fluid channels positioned on said first surface claim 1 , wherein a fluid can be applied to said pad members on said first surface.5. The fluid-film thrust bearing as set forth in further comprising a plurality of thrust pad members on said second surface.6. The fluid-film thrust bearing as set forth in wherein each of said thrust pad members on said second surface has a wedge-shape configuration with an outer ...

COMPRESSOR

A compressor includes a thrust force adjusting part which is configured to adjusts a thrust force between a back surface of a disc part in an impeller and a casing. The thrust force adjusting part includes an outer sealing part which seals a gap between the back surface and the casing, an inner sealing part which seals the gap at a position away inward in a radial direction, and a throttle formation part which has a throttle part in which the gap in an axial direction is formed to be narrowed inward in the radial direction. An outer space sandwiched by the outer sealing part and the inner sealing part and an inner space sandwiched by the inner sealing part and the throttle part are formed the gap The width of the throttle part is narrower than the width of the inner space. 1. A compressor , comprising:a rotary shaft which is configured to rotate about an axis;impellers which have a disc part rotating together with the rotary shaft;a casing which covers the rotary shaft and the impellers; anda thrust force adjusting part which are configured to adjust a thrust force in an axial direction in which the axis extends between a back surface of the disc part facing one side in the axial direction and the casing,wherein the thrust force adjusting part includes:an outer sealing part which seals a gap between the back surface and the casing;an inner sealing part which is disposed at a position away from the outer sealing part inward in a radial direction centered on the axis and seals the gap between the back surface and the casing; anda throttle formation part which has a throttle part in which the gap between the back surface and the casing in the axial direction is formed to be narrowed and formed at a position away from the inner sealing part inward in the radial direction,an outer space sandwiched by the outer sealing part and the inner sealing part and an inner space sandwiched by the inner sealing part and the throttle part are formed in the gap between the back ...

Fuel pump

There is provided a fuel pump ( 10 ) which includes an impeller ( 20 ) in a disk-like shape; a casing ( 18 ) comprised of a pump cover ( 14 ) and a pump body ( 16 ) that rotatably accommodate the impeller; and a motor section ( 70 ) that drives to rotate the impeller; wherein, on at least one of seal portions of the casing ( 18 ) and in its place facing to a series of recesses ( 20 b, 20 c ) of the impeller, a recessed shape ( 35,36 ) in a micron order is formed in expectation of a swelling amount of the series of recesses ( 20 b, 20 c ) of the impeller ( 20 ).

MAGNETIC THRUST LOAD SUPPORT FOR DOWNHOLE-TYPE SYSTEM

A downhole-type system includes a rotatable shaft; a sensor that can sense an axial position of the shaft and generate a first signal corresponding to the axial position of the shaft; a controller coupled to the sensor, in which the controller can receive the first signal generated by the sensor, determine an amount of axial force to apply to the shaft to maintain a target axial position of the shaft, and transmit a second signal corresponding to the determined amount of axial force; and multiple magnetic thrust bearings coupled to the shaft and the controller, in which each magnetic thrust bearing can receive the second signal from the controller and modify a load, corresponding to the second signal, on the shaft to maintain the target axial position of the shaft. 1. A downhole-type system comprising:a shaft; sense an axial position of the shaft, and', 'generate a first signal corresponding to the axial position of the shaft;, 'a sensor configured to receive the first signal generated by the sensor,', 'determine an amount of axial force to apply to the shaft to maintain a target axial position of the shaft, and', 'transmit a second signal corresponding to the determined amount of axial force; and, 'a controller coupled to the sensor, the controller configured to receive the second signal from the controller, and', 'modify a load, corresponding to the second signal, on the shaft to maintain the target axial position of the shaft., 'a plurality of magnetic thrust bearings coupled to the shaft and the controller, each magnetic thrust bearing configured to2. The system of claim 1 , wherein the plurality of magnetic thrust bearings is sealed from a downhole environment.3. The system of claim 1 , wherein the plurality of magnetic thrust bearings is lubricant-free.4. The system of claim 1 , wherein critical components of the plurality of magnetic thrust bearings are sealed from a downhole environment.5. The system of claim 1 , wherein the load is transmitted on the shaft ...

GAS TURBINE ENGINE

A gas turbine engine for an aircraft. The engine comprising: an engine core comprising a turbine, a compressor, a fan located upstream of the compressor and comprising a plurality of fan blades, and a core shaft connecting the turbine to the compressor; a gearbox which receives an input from the core shaft and outputs drive, via a driveshaft, to the fan so as to drive the fan at a lower rotational speed than the turbine, the drive shaft and core shaft forming a shaft system. The shaft system provides: a first portion which extends forward from a first thrust bearing to the fan, the first thrust bearing supporting the shaft system and being located between the turbine and the gearbox, and a second portion extending rearward from the first thrust bearing to the turbine, such that in the event of a shaft break within the second portion of the shaft system, said shaft break dividing the shaft system into a front portion axially located by the first thrust bearing and a rear portion no longer axially located by the first thrust bearing, the rear portion is free to move axially rearwardly under a gas load; and wherein the engine further comprises a shaft break detector, configured to detect a shaft break in the shaft system. 1. A gas turbine engine for an aircraft comprising:an engine core comprising a turbine, a compressor, a fan located upstream of the compressor and comprising a plurality of fan blades, and a core shaft connecting the turbine to the compressor; a first portion which extends forward from a first thrust bearing to the fan, the first thrust bearing supporting the shaft system and being located between the turbine and the gearbox, and', 'a second portion extending rearward from the first thrust bearing to the turbine, such that in the event of a shaft break within the second portion of the shaft system, said shaft break dividing the shaft system into a front portion axially located by the first thrust bearing and a rear portion no longer axially located by ...

Compressor wheel device and supercharger

A compressor wheel device comprises a compressor wheel attached to a rotary shaft and a thrust collar attached to the rotary shaft at a back surface of the compressor wheel. The compressor wheel includes: a wheel body part with a hub and at least one blade provided on an outer peripheral surface of the hub; and a sleeve part having a cylindrical shape projecting along an axis direction from a back surface of the hub and having an outer peripheral surface on which a sealing groove extending along a peripheral direction is formed. The thrust collar has a circular plate-like shape including: one surface including an abutting surface abutting on an end surface of the sleeve part and extending along a radial direction; and the other surface including a slidably-contacting surface slidably contacting a thrust bearing supporting the rotary shaft in a thrust direction and extending along the radial direction.

AXIAL RETENTION OF A FAN SHAFT IN A GAS TURBINE ENGINE

A gas turbine engine, comprising a fan driven by a fan shaft and retractable axial retainer of the shaft mounted on a stator element and movable between a first operational position and a second non-operational position. The retainer may comprise a fluid supply configured for supplying at least one cavity with fluid. In some examples, the retainer is mounted movable or slidingly so as to generate movement of the retainer between the operation and non-operational positions. 1. A gas turbine engine , comprising a fan driven by a fan shaft and retractable axial retention means for said shaft mounted on a stator element and movable between a first operational position and a second non-operational position , wherein said retention means comprises means for supplying fluid to at least one cavity wherein said retention means is movably mounted so as to generate movement of the retention means between said first operational position and said second non-operational position.2. The engine according to claim 1 , wherein said retention means comprises at least one finger claim 1 , movable between said positions claim 1 , in a substantially radial direction with respect to an axis of rotation of said fan shaft.3. The engine according to claim 2 , wherein said finger is biased into the non-operational position.4. The engine according to claim 1 , wherein said stator element is a bearing support.5. The engine according to claim 4 , wherein said bearing support comprises a downstream truncated part and an upstream cylindrical part which surrounds a rolling bearing and comprises claim 4 , at the outer periphery thereof claim 4 , said at least one cavity.6. The engine according to claim 5 , wherein said cylindrical part is surrounded by a downstream part of a fan disc.7. The engine according to claim 5 , further comprising means for pressurizing a seal claim 5 , and means for removing and conveying pressurized air to said at least one cavity.8. The engine according to claim 5 , ...

FAN MOTOR

This fan motor includes a motor and an impeller arranged to rotate together with a rotating portion of the motor. The motor includes a stationary portion including a stator, and the rotating portion, which includes a magnet arranged opposite to the stator and which is supported through a bearing portion to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion. The stationary portion includes a shaft arranged to extend along the central axis, and an upper thrust portion arranged to extend radially outward from an upper portion of the shaft. The rotating portion includes a sleeve portion arranged radially opposite to the shaft and axially opposite to the upper thrust portion; and a rotor hub portion arranged to extend in an annular shape around the sleeve portion, and arranged to have the impeller fixed thereto. An upper end of the stationary portion is arranged at a level higher than that of an upper end of the rotating portion. 1. A fan motor comprising:a motor including a stationary portion including a stator, and a rotating portion supported through a bearing portion to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion, the rotating portion including a magnet arranged opposite to the stator; andan impeller arranged to rotate together with the rotating portion of the motor; wherein a shaft arranged to extend along the central axis; and', 'an upper thrust portion arranged to extend radially outward from an upper portion of the shaft;, 'the stationary portion includes a sleeve portion arranged radially opposite to the shaft and axially opposite to the upper thrust portion; and', 'a rotor hub portion arranged to extend in an annular shape around the sleeve portion, and arranged to have the impeller fixed thereto; and, 'the rotating portion includesan upper end of the stationary portion is arranged at a level higher than that of an upper end of the rotating ...

Cooling device

A cooling device includes: a fan motor including a rotation shaft, an impeller supported by the rotation shaft, and a sleeve bearing unit pivotally supporting the rotation shaft; and a heat sink including heat radiation pins extending from a base portion. The fan motor is placed on the heat sink. The impeller includes a blade support element supported by the rotation shaft and a fan blade extending from the blade support element in an outer peripheral direction of the rotation shaft. The heat radiation pins extend from the base portion toward the sleeve bearing unit in a direction along the rotation shaft. The impeller is spaced apart from the heat radiation pins between the sleeve bearing unit and the heat radiation pins. The blade support element and at least one of the heat radiation pins overlap with each other as viewed in a direction of the rotation shaft.

AIR MOVER CIRCUITRY AND COMPLIANT MEMBER

A blower () comprising: (a) a rotor () including: (i) a magnet () and (ii) a shaft () including a recess on an end of the shaft (); (b) a stator () that at least partially extends within the rotor (); and (c) a compliant member (); wherein the compliant member () extends into the recess and the compliant member () is compliant so that the compliant member () allows the shaft () to move. 1) A blower comprising: i. a magnet and', 'ii. a shaft including a recess on an end of the shaft;, 'a. a rotor includingb. a stator that at least partially extends within the rotor; andc. a compliant member,wherein the compliant member extends into the recess and the compliant member is flexible so that the compliant member allows the shaft to move, at least partially moves with the shaft, or both.2) The blower of claim 1 , wherein the compliant member is at least partially made of an elastomeric material and/or include an elastomer.3) The blower of claim 1 , wherein the compliant member has a Shore hardness of about 20 A to about 100 A when measured according to ASTM D2240.4) The blower of claim 1 , wherein the compliant member allows the shaft to move axially along the axis of the shaft.5) The blower of claim 1 , wherein the compliant member allows the shaft to move so that vibrations claim 1 , noise claim 1 , harshness claim 1 , or a combination thereof are prevented from passing from the shaft to the impeller claim 1 , the stator claim 1 , a blower housing claim 1 , or a combination thereof.6) The blower of claim 1 , wherein the compliant member substantially reduces and/or eliminates acceleration of the shaft axially so that a force between the shaft claim 1 , the compliant member claim 1 , or both and an adjacent blower component is substantially reduced and/or eliminated.7) The blower of claim 6 , wherein deceleration of the of the shaft claim 6 , the compliant member claim 6 , or both is exponential as the shaft claim 6 , the compliant member claim 6 , or both approach the ...

DRIVE DEVICE AND BLOWER DEVICE

A drive device includes: a board including an opening; and a motor including: a rotational shaft; a housing supporting the rotational shaft for rotation, fixed to the board so as to surround the opening, and having a cylindrical shape; a bearing supporting the rotational shaft for rotation and press-fitted onto an inner peripheral surface of the housing; and a thrust cover supporting an end of the rotational shaft and fixed onto the inner peripheral surface of the housing by an adhesive. 1. A drive device comprising:a board including an opening; and a rotational shaft;', 'a housing supporting the rotational shaft for rotation, fixed to the board so as to surround the opening, and having a cylindrical shape;', 'a bearing supporting the rotational shaft for rotation and press-fitted onto an inner peripheral surface of the housing; and', 'a thrust cover supporting an end of the rotational shaft and fixed onto the inner peripheral surface of the housing by an adhesive,, 'a motor includingwherein a first recessed portion recessed radially outwardly from the opening; and', 'a first projection portion projecting radially inwardly from the opening,, 'an inner edge of the opening includes a second recessed portion recessed radially inwardly from the thrust cover; and', 'a second projection portion projecting radially outwardly from the thrust cover,, 'an outer edge of the thrust cover includesat least the first and second projection portions partially overlap each other when viewed in an axial direction of the rotational shaft,a first gap is defined between the second recessed portion and the inner peripheral surface of the housing in a radial direction of the rotational shaft,a second gap is defined between the first and second projection portions in the axial direction of the rotational shaft, andthe adhesive is filled in the first and second gaps.2. The drive device of claim 1 , whereinbefore the thrust cover is fixed to the housing by the adhesive, the thrust cover is ...

COMPRESSOR THRUST BEARING SURGE PROTECTION

The present invention provides a method and apparatus of inhibiting a thrust bearing capacity of a compression system from being exceeded during a surge event in which a thrust bearing is biased with a biasing force to increase the thrust bearing overload margin between the capacity of thrust bearing to absorb axial forces and the greatest force produced during the surge event. This biasing force can be produced by appropriately sizing the high pressure seal on the side of the impeller opposite to the inlet of a compressor of the compression system so that the back disk force produced in the high pressure region of the high pressure seal and the low pressure region located inwardly of the high pressure region creates the desired bias force value and direction. 1. A compressor system with thrust bearing surge protection comprising:a first compressor having a first compressor shaft and at least one impeller;a second compressor having a second compressor shaft and at least one impeller;a motor shaft directly coupled to the first compressor shaft and the second compressor shaft;an electric motor configured for driving the motor shaft and the at least one impeller of the first compressor and the at least one impeller of the second compressor through rotation of first and second compressor shafts;a thrust bearing coupled to the motor shaft between the at least one impeller of the first compressor and the at least one impeller of the second compressor, the thrust bearing having a first thrust bearing capacity to absorb axial loads acting upon the thrust bearing in a first axial direction and a second thrust bearing capacity to absorb axial loads acting upon the thrust bearing in a second axial direction opposite to the first axial direction; andwherein the thrust bearing is biased with a preloaded biasing force acting in the first or second axial direction such that in a two-phase surge event characterized by an initial phase where the sudden loss of discharge pressure ...

TURBOCHARGER THRUST BEARING DEBRIS TRAP

A turbocharger for an internal combustion engine includes a bearing housing and a rotating assembly arranged therein. The rotating assembly includes a shaft with a turbine wheel and a compressor wheel. The turbocharger also includes a thrust bearing assembly operatively connected to the shaft, lubricated by pressurized oil from the engine, and configured to transmit thrust forces developed by the turbine wheel to the bearing housing. The thrust bearing assembly includes a thrust plate having a first thrust face and a thrust washer having a second thrust face. An oil film is generated between the first and second thrust faces, and the first and second thrust faces rotate relative to each other and transmit the thrust forces to the bearing housing. The thrust plate and/or the thrust washer include a circumferential groove configured to trap oil-borne debris and minimize an amount of the debris in the oil film. 1. An internal combustion engine comprising:an engine block defining a combustion chamber configured to receive an air-fuel mixture for combustion therein and configured to exhaust post-combustion gasses therefrom;an oil pump configured to supply pressurized oil; and a bearing housing;', 'a rotating assembly arranged within the bearing housing and having a shaft with a turbine wheel configured to be driven by the post-combustion gasses and a compressor wheel configured to pressurize the airflow for delivery to the combustion chamber; and', 'a thrust bearing assembly operatively connected to the shaft, lubricated by the pressurized oil, and configured to transmit thrust forces developed by the turbine wheel to the bearing housing;', the thrust bearing assembly includes a thrust plate fixed to the bearing housing and having a first thrust face, and a thrust washer fixed to the shaft and having a second thrust face;', 'the pressurized oil generates an oil film between the first and second thrust faces;', 'the second thrust face is configured to rotate relative to ...

Electrical submersible pumping systems

Systems and methods facilitate pumping of various fluids such as well fluids. An electric submersible pumping system is constructed with an outer housing that contains an integrated pump and motor. The pump may include an impeller disposed within a stator of the motor. The integration of the pump and the motor enables elimination of various components of traditional electric submersible pumping systems to thus provide a simpler and more compact system for pumping fluids.

FLINGER OIL SEAL AND TURBOCHARGER INCORPORATING THE SAME

A compressor oil seal comprising a thrust bearing () adapted for insertion into a turbocharger housing cavity (), concentric with the turbocharger's compressor wheel shaft (). An insert () is adapted for insertion into the cavity () adjacent the thrust bearing (), wherein the thrust bearing () and insert () are configured to provide an oil drain cavity () therebetween. The oil seal also includes an oil flinger () that includes a flinger flange () and a sleeve portion () extending therefrom. The flinger flange () extends between the thrust bearing () and the insert (). A plurality of spiral vane segments () are circumferentially spaced about the flinger flange (). Each spiral vane segment () extends arcuately from a first end () to a second end (). The spiral vane segments () are disposed between the flinger flange () and the insert (). The spiral vane segments () may extend into a recess () formed into the insert (), and the recess () may include at least one discharge port (). 1. A compressor oil seal , comprising:{'b': 59', '33', '11, "a thrust bearing () adapted for insertion into a turbocharger housing cavity (), concentric with the turbocharger's compressor wheel shaft ();"}{'b': 360', '33', '59', '59', '360', '35, 'an insert () adapted for insertion into the cavity () adjacent the thrust bearing (), wherein the thrust bearing () and insert () are configured to provide an oil drain cavity () therebetween;'}{'b': 340', '382', '383', '382', '59', '360', '383', '385', '360, 'an oil flinger () including a flinger flange () and a sleeve portion () extending therefrom, wherein the flinger flange () extends between the thrust bearing () and the insert (), and wherein the sleeve portion () extends axially into an insert bore () formed through a central portion of the insert (); and'}{'b': 74', '382, 'a plurality of spiral vane segments () circumferentially spaced about the flinger flange ().'}274382360. The compressor oil seal according to claim 1 , wherein the spiral ...

SYSTEMS AND METHODS TO CLAMP AN IMPELLER TO A COMPRESSOR SHAFT

Systems and methods to clamp an impeller on a shaft in a centrifugal compressor. The embodiments as disclosed herein may include clamping individual impeller independently to the shaft, which may reduce the tolerance stack-up effect of a plurality of impellers. The impeller can be clamped to the shaft by positioning, for example, a relatively stiff support (e.g. a shaft locknut) on a front side of the impeller. The impeller can also be clamped to the shaft by a relatively flexible support to compensate for e.g. thermal expansion/contraction of the impeller. The embodiments as disclosed herein are particularly suitable for a multi-stage impeller. 1. A system to clamp an impeller to a shaft in a compressor , comprising:a relatively stiff support to support a front side of the impeller; anda relatively flexible support to support a backside of the impeller, wherein the front side of the impeller receives a fluid in operation, and the backside is opposite to the front side with the respect to the impeller; andthe relatively stiff support is positioned to relieve at least a portion of thrust load on the impeller during operation.2. The system of claim 1 , wherein the relatively stiff support includes a locknut.3. The system of claim 2 , wherein the relatively stiff support further includes a washer between the locknut and the front side of the impeller.4. The system of claim 1 , wherein the relatively flexible support includes a shim member claim 1 , a spring member and a spacing member; and the shim member is configured to be in contact with the backside of the impeller.5. The system of claim 4 , wherein the spring member is a conical washer.6. A compressor claim 4 , comprising:an impeller including a front side and a backside;a relatively stiff support to support the front side of the impeller; anda relatively flexible support to support the backside of the impeller,wherein the front side of the impeller receives a fluid in operation, and the backside is opposite to ...

SUPERCHARGED INTERNAL COMBUSTION ENGINE WITH COMPRESSOR

Methods and systems are provided for a turbocharger. In one example, the turbocharger may include one or more cooling devices for cooling a compressor. The cooling devices may include a ventilation system arranged in a compressor impeller and shaft, the ventilation system configured to allow ambient air to flow into the shaft without being compressed. 1. A supercharged internal combustion engine comprising:an intake system for the supply of a charge-air flow, an exhaust-gas discharge system for the discharge of exhaust gas, at least one compressor arranged in the intake system, which compressor comprises at least one impeller which is mounted, in a compressor housing, on a rotatable shaft, and a bearing housing for the accommodation and mounting of the rotatable shaft of the at least one compressor, and where the rotatable shaft of the at least one compressor is equipped with a ventilation system which comprises at least one duct which is formed so as to be open to the intake system upstream of the at least one compressor and from which at least one line branches off which emerges from the shaft between the at least one compressor and the bearing housing.2. The supercharged internal combustion engine of claim 1 , wherein the at least one duct opens out into the intake system at a compressor-side end side of the shaft.3. The supercharged internal combustion engine of claim 1 , wherein the at least one duct is of rectilinear form and is coaxial with the shaft.4. The supercharged internal combustion engine of claim 1 , wherein the at least one line is of rectilinear form and extends in a radially outward direction perpendicular to the duct and the shaft.5. The supercharged internal combustion engine of claim 1 , wherein the shaft has claim 1 , at the impeller side claim 1 , a thickened shaft end for accommodating the at least one impeller.6. The supercharged internal combustion engine of claim 1 , wherein the at least one compressor which can be driven by means of an ...

ROTOR AND VACUUM PUMP EQUIPPED WITH SAME

A rotor of a vacuum pump has first and second cylindrical bodies and a connecting portion for connecting the end portions of the cylindrical bodies together. The first cylindrical body has a plurality of rotor blades on an outer circumferential surface thereof, and configures a blade exhaust portion when the rotor blades are arranged along an axial center of the vacuum pump alternately with a plurality of stator blades. The second cylindrical body configures a threaded groove exhaust portion when a threaded groove exhaust flow passage is formed at least on an inner circumference of the second cylindrical body. In this rotor, a balancing portion for the rotor is provided on an inner circumferential surface of the first cylindrical body or the connecting portion, and mass adding means is provided in the balancing portion. 1. A rotor of a vacuum pump for exhausting gas from a chamber , the rotor comprising:a first cylindrical body;a second cylindrical body; anda connecting portion that connects end portions of the first and second cylindrical bodies together, wherein:the first cylindrical body comprises a plurality of rotor blades on an outer circumferential surface thereof, and further comprises a blade exhaust portion when the rotor blades are arranged along an axial center of the vacuum pump alternately with a plurality of stator blades,the second cylindrical body comprises a threaded groove exhaust portion when a threaded groove exhaust flow passage is formed at least on an inner circumference of the second cylindrical body,the connecting portion comprises an annular plate provided integrally with a lower end of the first cylindrical body and an annular convex portion provided integrally with an outer circumferential portion of the annular plate, the first and second cylindrical bodies being connected to each other by fitting the second cylindrical body into the annular convex portion, andan anti-corrosion mass adding means is provided on an inner circumferential ...

MOTOR HAVING SHOCK-PROOF DESIGN

A motor includes a shaft, a shell, a sleeve, an abrasion-resistance piece, a bearing, an oil seal, and several compressed springs. The shaft has an axial line. The shell is connected to the shaft. The sleeve has an accommodating space, and the wall of the accommodating space forms a first inclined surface which is inclined at an angle with respect to the axial line. The abrasion-resistance piece is disposed at the bottom of the accommodating space. The bearing is disposed in the accommodating space, and the outer wall of the bearing forms a second inclined surface corresponding to the first inclined surface. The shaft passes through the bearing and abuts the abrasion-resistance piece. The oil seal is affixed to the wall of the accommodating space and covers the bearing. The compressed springs are connected between the oil seal and the bearing. 1. A motor , comprising:a shaft having an axial line;a rotor shell connected to the shaft;a sleeve having an accommodating space, wherein the wall of the accommodating space forms a first inclined surface which is inclined at an angle with respect to the axial line;an abrasion-resistance piece disposed at the bottom of the accommodating space;a bearing disposed in the accommodating space, and the outer wall of the bearing forms a second inclined surface which corresponds to the first inclined surface, and the shaft passes through the bearing and abuts the abrasion-resistance piece;an oil seal affixed to the wall of the accommodating space and covering the bearing; anda plurality of compressed springs connected between the oil seal and the bearing.2. The motor as claimed in claim 1 , wherein when the bearing and the shaft are subjected to an external force along a first direction to move parallel to the axial line of the shaft so that the shaft is separated from the abrasion-resistance piece claim 1 , the compressed springs are deformed by force and exert an elastic restoring force along a second direction on the bearing to ...

AXIAL BEARING OFFLOADING IN FLUID PROCESSING MACHINES

The axial reaction force generated by a subsea pump or compressor is partially counteracted by a pressure differential in a barrier fluid across a thrust element. The pressure differential is created using impellers or other structures on the thrust element that increases the barrier fluid pressure on one side of the thrust element when the main shaft of the pump or compressor is rotated. The pressure differential across the thrust element partially offloads the bearing surface of the thrust element. 1. A fluid pressure increasing machine , comprising:a fluid processing chamber configured to contain a process fluid and including an inlet and an outlet;a first member rotatable about a central longitudinal axis;a motor system mechanically engaged to the first member so as to rotate the member about the longitudinal axis in a rotation direction;a plurality of impellers being fixedly mounted to the first member and exposed to the process fluid within the fluid processing chamber such that when the first member is rotated in the rotation direction the impellers act on the process fluid thereby increasing pressure of the process fluid towards the outlet and a reaction force is imparted on the first member in an axial direction from the outlet toward the inlet; anda first rotating element surrounded by a barrier fluid and fixedly attached to the first member, the rotating element having a higher pressure surface exposed to the barrier fluid at a higher pressure and a lower pressure surface exposed to the barrier fluid at a lower pressure, the difference between the higher and lower pressures acting on the respective higher and lower pressure surfaces generating a force on the first member that at least partially counteracts the reaction force.2. The fluid processing machine of wherein the difference between the higher and lower pressure is at least partially caused by structures on the first member configured to increase the barrier fluid pressure when rotating the first ...

Rotary machine

A centrifugal compressor includes an impeller fixed to a rotary shaft, and a casing accommodating the impeller. The impeller includes a disc-shaped disc portion, a plurality of blade portions provided to be separated from one another in a circumferential direction, and a cover portion facing the disc portion with a gap interposed therebetween and covering the plurality of blade portions from one of two sides in the axial direction. The casing includes a perforated face, which faces the cover portion with a gap interposed therebetween, is provided at an inner peripheral side area in relation to an outer peripheral side end of the cover portion, and is provided with a plurality of holes.

GAS TURBINE ENGINE

A gas turbine engine for an aircraft. The engine including: an engine core with a turbine, a compressor, a fan located upstream of the compressor and including a plurality of fan blades, and a core shaft connecting the turbine to the compressor; a gearbox which receives an input from the core shaft and outputs drive, via a driveshaft, to the fan so as to drive the fan at a lower rotational speed than the turbine, the drive shaft and core shaft forming a shaft system. 1. A gas turbine engine for an aircraft comprising:an engine core comprising a turbine, a compressor, a fan located upstream of the compressor and comprising a plurality of fan blades, and a core shaft connecting the turbine to the compressor; a first portion which extends forward from a first thrust bearing to the fan, the first thrust bearing supporting the shaft system and being located between the turbine and the gearbox, and', 'a second portion extending rearward from the first thrust bearing to the turbine, such that in the event of a shaft break within the second portion of the shaft system, said shaft break dividing the shaft system into a front portion axially located by the first thrust bearing and a rear portion no longer axially located by the first thrust bearing, the rear portion is free to move axially rearwardly under a gas load; and, 'a gearbox which receives an input from the core shaft and outputs drive, via a driveshaft, to the fan so as to drive the fan at a lower rotational speed than the turbine, the drive shaft and core shaft forming a shaft system, wherein the shaft system provideswherein the engine further comprises a shaft break detector, configured to detect a shaft break in the shaft system.2. The gas turbine engine as claimed in claim 1 , wherein the core shaft is supported by one or more non-thrust bearings located rearwards of the first thrust bearing.3. The gas turbine engine as claimed in claim 1 , wherein the first thrust bearing is located such that the pathway for ...

TURBOCHARGER BEARING ASSEMBLY AND METHOD FOR PROVIDING THE SAME

An integrated bearing assembly includes a thrust bearing disposed along a face of a turbocharger casing in a turbocharger and extending circumferentially around an axis of rotation of a rotor of the turbocharger, and a dual film journal bearing radially disposed between the rotor and the turbocharger casing which can be semi-floating or fully floating. The journal bearing includes a shoulder step radially extending away from the rotor. The shoulder step of the journal bearing engages one or more of the thrust bearing or the turbocharger casing to prevent axial movement of the dual film journal bearing relative to the turbocharger casing. 1. An integrated bearing assembly comprising:a thrust bearing disposed along a face of a turbocharger casing in a turbocharger and extending circumferentially around an axis of rotation of a rotor of the turbocharger; anda dual film journal bearing radially disposed between the rotor and the turbocharger casing, wherein the journal bearing includes a shoulder step radially extending away from the rotor, the shoulder step of the journal bearing engaging one or more of the thrust bearing or the turbocharger casing to prevent axial movement of the journal bearing relative to the turbocharger casing, is spaced apart from the turbocharger casing along axial directions that are parallel to the axis of rotation of the rotor with a portion of the thrust bearing disposed between the shoulder step of the journal bearing and the turbocharger casing along the axial directions;', 'radially extends away from the rotor and into a recess in the turbocharger casing; or', 'radially extends away from the rotor and along a surface of the thrust bearing that also engages the turbocharger casing., 'wherein the shoulder step of the journal bearing one or more of2. The bearing assembly of claim 1 , wherein the thrust bearing includes a recess radially extending into the thrust bearing away from the rotor claim 1 , and wherein the shoulder step of the ...

Blower fan

A lower plate includes a lower air inlet arranged radially outward of a bearing portion. In a plan view, a plane is divided into four regions by a first straight line which is parallel to an air outlet and crosses a central axis and a second straight line which is perpendicular to the air outlet and crosses the central axis, and one of the four regions in which a tongue portion is arranged is a first region, followed by a second region, a third region, and a fourth region in this order in a rotation direction of the blades. The air outlet is arranged to extend over both the first and fourth regions.

TURBO COMPRESSOR

A turbo compressor comprises a rotary shaft including a rotor; a first impeller coupled to one side of the rotary shaft, a thrust bearing runner coupled between the first impeller and the rotary shaft, an impeller sleeve compressed and coupled between the first impeller and the thrust bearing runner, a second impeller coupled to the other side of the rotary shaft, and a tie rod passing through the first impeller and a thrust bearing and fastened to the rotary shaft. 1. A turbo compressor , comprising:a rotary shaft comprising a rotor and a groove formed at a first side of the rotary shaft;a first impeller provided at the first side of the rotary shaft such that a base of the first impeller faces the groove;a thrust bearing runner provided between the first impeller and the rotary shaft;a second impeller provided at a second side of the rotary shaft opposite to the first side, the second impeller having a smaller maximum diameter than that of the first impeller; anda tie rod having an outer diameter that is smaller than an inner diameter of the groove, wherein the tie rod is configured to be coupled to the groove when a preload is applied to the first impeller and the thrust bearing runner.2. The turbo compressor of claim 1 , further comprising a coupling sleeve provided between the first impeller and the thrust bearing runner.3. The turbo compressor of claim 2 , wherein the first impeller and the thrust bearing runner comprise coupling shafts configured to be inserted into the coupling sleeve so as to couple the first impeller and the thrust bearing runner.4. The turbo compressor of claim 3 , wherein outer diameters of the coupling shafts are equal to or greater than an inner diameter of the coupling sleeve such that the coupling shafts are coupled to the coupling sleeve by press fitting.5. The turbo compressor of claim 4 , wherein a sum of lengths of the coupling shafts inserted into the coupling sleeve is smaller than a length of the coupling sleeve such that the ...

A CENTRIFUGAL CONPRESSOR HAVING AN INTER-STAGE SEALING ARRANGEMENT

The centrifugal compressor includes an hermetic housing; a drive shaft (); a first and a second compression stage () configured to compress a refrigerant, the first and second compression stages () respectively including a first and a second impeller (), the first and second impellers () being connected to the drive shaft () and being arranged in a back-to-back configuration; a radial annular groove () formed between the back-sides () of the first and second impellers (); an inter-stage sealing arrangement () provided between the first and second compressor stages () and in the radial annular groove (); a radial bearing arrangement configured to rotatably support the drive shaft (); and a thrust bearing arrangement configured to limit an axial movement of the drive shaft () during operation. The diameter of the inter-stage sealing arrangement () is configured to minimize the amplitude of the axial load applying on the thrust bearing arrangement during operation of the centrifugal compressor (). 1. A centrifugal compressor including:an hermetic housing,a drive shaft rotatably arranged within the hermetic housing,a first and a second compression stage configured to compress a refrigerant, the first and second compression stages respectively including a first and a second impeller, each of the first and second impellers having a front-side and a back-side, the first and second impellers being connected to the drive shaft and being arranged in a back-to-back configuration,a radial annular groove formed between the back-sides, of the first and second impellers,a circular inter-stage sealing arrangement provided between the first and second compressor stages and in the radial annular groove,a radial bearing arrangement configured to rotatably support the drive shaft, anda thrust bearing arrangement configured to limit an axial movement of the drive shaft during operation,wherein the diameter of the inter-stage sealing arrangement is configured to minimize the amplitude of ...

Turbocharger

A turbocharger includes: an oil drainage path formed in a radial bearing support, one end of the oil drainage path being opened on at least one of a surface facing a thrust bearing and a surface facing a supported portion in the radial bearing support, the other end of the oil drainage path being opened on a bottom surface of the radial bearing support, an entire projected surface of the oil drainage path projected along a central axis thereof to an oil outlet being included within the oil outlet; and an oil drainage space provided between the thrust bearing and an impeller and connected to an oil chamber.

LEVELING PLATE AND THRUST BEARING DEVICE USING THE SAME

A leveling plate including a main body and an end protrusion. The end protrusion is provided at both ends in a longer side direction of the main body, and protrudes from the main body in a thickness direction, the end protrusion having an end circumferential surface whose central axis extends in parallel with a shorter side direction of the main body. 1. A leveling plate , comprising:a main body including a surface extending in first and second directions orthogonal to each other; andan end protrusion which is provided respectively at both ends of the main body in the first direction, and protrudes from the main body in a third direction perpendicular to the surface, the end protrusion having an end circumferential surface whose central axis extends in the second direction of the main body.2. The leveling plate according to claim 1 , further comprising:an intermediate protrusion which is provided between the end protrusions of the main body in the first direction, and protrudes from the main body to an opposite side of the end protrusions in the third direction, the intermediate protrusion having an intermediate circumferential surface whose central axis extends in the second direction of the main body.3. The leveling plate according to claim 2 , whereinthe end protrusions are provided symmetrically across the intermediate protrusion, and extend in parallel with the intermediate protrusion.4. The leveling plate according to wherein{'b': 1', '2', '1', '2, 'letting an imaginary line connecting a central axis of the intermediate circumferential surface with a central axis of the end circumferential surface be a line L, and an imaginary line which is tangent to each tip end of the end protrusions be a line L in a section perpendicular to the central axis of the end protrusion, an angle α formed by the line L and the line L is α≦55°.'}5. The leveling plate according to claim 2 , wherein{'b': 1', '2', '1', '2, 'letting a radius of the intermediate circumferential surface ...

Turbocharger Having Thrust Bearing Oil Retainer

A turbocharger includes a turbine wheel, a compressor wheel, and a shaft coupled to the turbine wheel and the compressor wheel. The turbocharger additionally includes a bearing housing containing a thrust bearing through which the shaft extends. The bearing housing receives oil and drains the oil therefrom. The bearing housing includes a reservoir that maintains a retained portion of the oil received in the bearing housing after the oil is drained from the bearing housing. The retained portion of the oil lubricates the thrust bearing. 1. A turbocharger comprising:a turbine wheel, a compressor wheel, and a shaft coupled to the turbine wheel and the compressor wheel; anda bearing housing containing a thrust bearing through which the shaft extends, wherein the bearing housing receives oil and drains the oil therefrom;wherein the bearing housing includes a reservoir that maintains a retained portion of the oil received in the bearing housing after the oil is drained from the bearing housing, the retained portion of the oil lubricating the thrust bearing.2. The turbocharger according to claim 1 , wherein the thrust bearing is arranged in the reservoir in contact with the retained portion of the oil.3. The turbocharger according to claim 1 , wherein the thrust bearing has a lower portion that protrudes into the reservoir. The turbocharger according to claim 1 , wherein the thrust bearing has an outer periphery that includes a truncated portion with a central region claim 1 , wherein the central region defines the lower portion.54. The turbocharger according to claim claim 1 , wherein the central region has a constant radius that is concentric with an axis of rotation of the shaft.64. The turbocharger according to claim claim 1 , wherein the reservoir includes a lower wall having ends at an elevation above the lower portion of the thrust bearing.74. The turbocharger according to claim claim 1 , wherein the truncated portion of the outer periphery of the thrust bearing ...

TURBOCHARGER

This turbocharger (A) is provided with: a rotating shaft (); a turbine wheel (); a compressor wheel (); a bearing housing () provided with journal bearings (A, B) for rotatably supporting a shaft (), and a thrust bearing () for supporting the rotating shaft () in the center axis (C) direction thereof; and a turbine housing () in which the turbine wheel () is accommodated. A fluid supply section (A) for supplying a fluid to the turbine wheel () is provided within the turbine housing () and said fluid presses the turbine wheel () toward a first end () side. 14-. (canceled)5. A turbocharger comprising:a rotating shaft which extends along a center axis;a turbine wheel which is provided on a first end side of the rotating shaft;a compressor wheel which is provided on a second end side of the rotating shaft;a bearing housing which includes a radial bearing for rotatably supporting the rotating shaft and a thrust bearing for supporting the rotating shaft in the center axis direction;a turbine housing which receives the turbine wheel; anda fluid supply section for supplying a fluid which presses the turbine wheel toward the first end side to the turbine wheel in the turbine housing,wherein the fluid supply section extracts a gas from an upstream side of the turbine wheel in a flow direction of the gas supplied to the turbine wheel, and supplies the gas to a back surface of the turbine wheel on the second end side.6. The turbocharger comprising:a rotating shaft which extends along a center axis;a turbine wheel which is provided on a first end side of the rotating shaft;a compressor wheel which is provided on a second end side of the rotating shaft;a bearing housing which includes a radial bearing for rotatably supporting the rotating shaft and a thrust bearing for supporting the rotating shaft in the center axis direction;a turbine housing which receives the turbine wheel; anda fluid supply section for supplying a fluid which presses the turbine wheel toward the first end ...

MAGNETIC BEARING CENTRIFUGAL COMPRESSOR AND CONTROLLING METHOD THEREOF

A magnetic bearing centrifugal compressor includes a magnetic bearing spindle having a thrust disk, front and rear axial bearings, an impeller and at least one labyrinth seal. The front and the rear axial bearings are disposed individually to opposing sides of the thrust disk. First and second clearances exist axially between the rear and front axial bearings, respectively, and the thrust disk. The impeller connects a front end of the magnetic bearing spindle. The labyrinth seal pairs the magnetic bearing spindle into an oblique arrangement with respect to the axial direction, and each the labyrinth seal is spaced from the magnetic bearing spindle or the impeller by a labyrinth-seal clearance. By controlling the thrust disk axially, a clearance ratio of the first clearance to the second clearance can be varied to adjust the labyrinth-seal clearance. In addition, a magnetic bearing centrifugal compressor controlling method is also provided. 1. A magnetic bearing centrifugal compressor , comprising:a magnetic bearing spindle, movable in an axial direction, including an axial thrust-reducing ring;a thrust disk, sleeving fixedly the magnetic bearing spindle in a radial direction;a front axial bearing and a rear axial bearing, disposed individually to two opposing sides of the thrust disk, wherein a first clearance exists between the rear axial bearing and the thrust disk in the axial direction, wherein a second clearance exists between the front axial bearing and the thrust disk in the axial direction;an impeller, connected to a front end of the magnetic bearing spindle; andat least one labyrinth seal, pairing the magnetic bearing spindle into an oblique arrangement with respect to the axial direction, each of the at least one labyrinth seal being spaced from the magnetic bearing spindle or the impeller by a labyrinth-seal clearance;wherein, by controlling a position of the thrust disk in the axial direction, a clearance ratio of the first clearance to the second ...

SYSTEMS AND METHODS TO CLAMP AN IMPELLER TO A COMPRESSOR SHAFT

Systems and methods to clamp an impeller on a shaft in a centrifugal compressor. The embodiments as disclosed herein may include clamping individual impeller independently to the shaft, which may reduce the tolerance stack-up effect of a plurality of impellers. The impeller can be clamped to the shaft by positioning, for example, a relatively stiff support (e.g. a shaft locknut) on a front side of the impeller. The impeller can also be clamped to the shaft by a relatively flexible support to compensate for e.g. thermal expansion/contraction of the impeller. The embodiments as disclosed herein are particularly suitable for a multi-stage impeller. 119-. (canceled)20. A system to clamp an impeller to a shaft in a refrigerant compressor in a heating , ventilation , and air conditioning (HVAC) system , the impeller being fitted onto the shaft , comprising: an inner tab fitted into a slot on the shaft, and', 'an outer tab bent towards the front side of the impeller; and, 'a relatively stiff support configured to be fitted onto an outside of the shaft and to support a front side of the impeller, the relatively stiff support including a locknut and a washer, the washer being disposed between the locknut and the front side of the impeller, the washer includinga relatively flexible support configured to be fitted onto the shaft and to support a backside of the impeller, whereinthe front side of the impeller receives a flow of refrigerant gas during operation, and the backside of the impeller is opposite to the front side of the impeller, andthe relatively stiff support being positioned to relieve at least a portion of a thrust load on the impeller during operation, the thrust load being in a direction from the backside of the impeller to the front side of the impeller.21. the system of claim 20 , wherein the outer tab of the washer is bent into a slot in the front side of the impeller.22. the system of claim 20 , wherein the relatively stiff support is configured to abut the ...

TURBOCHARGER ASSEMBLY

A compressor assembly can include a shaft sleeve that includes a bore that extends between a first end and a second end and an outer shoulder; a shaft received by the bore of the shaft sleeve where the shaft includes a compressor end; a compressor wheel disposed on the shaft; and a thrust collar disposed on the shaft and seated between the outer shoulder of the shaft sleeve and the compressor wheel where the thrust collar includes a stem portion and a cap portion that includes a sacrificial portion. 1. A compressor assembly comprising:{'b': 450', '451', '452', '454', '453, 'a shaft sleeve () that comprises a bore () that extends between a first end () and a second end () and an outer shoulder ();'}{'b': 400', '451', '450', '400', '402, 'a shaft () received by the bore () of the shaft sleeve () wherein the shaft () comprises a compressor end ();'}{'b': 250', '400, 'a compressor wheel () disposed on the shaft (); and'}{'b': 540', '400', '453', '450', '250', '540', '552', '554', '556, 'a thrust collar () disposed on the shaft () and seated between the outer shoulder () of the shaft sleeve () and the compressor wheel () wherein the thrust collar () comprises a stem portion () and a cap portion () that comprises a sacrificial portion ().'}2. The compressor assembly of wherein the sacrificial portion of the thrust collar comprises at least one balance cut.3. The compressor assembly of wherein the cap portion of the thrust collar comprises a sensor notch.4. The compressor assembly of wherein the sensor notch extends through the sacrificial portion.5. The compressor assembly of wherein the thrust collar comprises an annular groove about an exterior of the stem portion.6. The compressor assembly of wherein the sacrificial portion comprises a triangular cross-sectional shape.7. The compressor assembly of wherein the sacrificial portion extends to an outermost perimeter of the thrust collar.8. The compressor assembly of wherein the sacrificial portion extends axially to an ...

TURBOCHARGER ASSEMBLY

A turbocharger assembly can include a shaft sleeve that includes a bore that extends between a first end and a second end; a shaft received by the bore of the shaft sleeve where the shaft includes a compressor end and a turbine wheel that defines a turbine end; and a balance collar disposed on the shaft and seated axially between the end of the shaft sleeve and the turbine wheel wherein the balance collar includes a stem portion and a flared portion that includes a sacrificial portion. 1. A turbocharger assembly comprising:{'b': 450', '451', '452', '454, 'a shaft sleeve () that comprises a bore () that extends between a first end () and a second end ();'}{'b': 400', '451', '450', '400', '402', '270', '404, 'a shaft () received by the bore () of the shaft sleeve () wherein the shaft () comprises a compressor end () and a turbine wheel () that defines a turbine end (); and'}{'b': 1240', '400', '454', '450', '270', '1240', '1252', '1254', '1256, 'a balance collar () disposed on the shaft () and seated axially between the end () of the shaft sleeve () and the turbine wheel () wherein the balance collar () comprises a stem portion () and a flared portion () that comprises a sacrificial portion ().'}2. The turbocharger assembly of wherein the sacrificial portion of the balance collar comprises at least one balance cut.3. The turbocharger assembly of wherein the balance collar comprises a balance cut defined at least in part by a chord of a circle wherein the circle has a radius defined by an outermost perimeter of the balance collar.4. The turbocharger assembly of wherein the balance collar comprises a stepped bore that comprises an annular axial face.5. The turbocharger assembly of wherein an axial face surface of a hub portion of the shaft seats against the annular axial face.6. The turbocharger assembly of wherein the balance collar is loaded by an axial load between the second end of the shaft sleeve and the axial face surface of the hub portion of the shaft.7. The ...

TURBOCHARGER ASSEMBLY

A turbocharger assembly can include a shaft sleeve that includes a bore that extends between a compressor end and a turbine end, outer threads that extend to a first axial position from the compressor end, and an outer shoulder at a second, greater axial position from the compressor end; a lock nut that includes inner threads that mate with the outer threads of the shaft sleeve and an axial length that is less than a distance between the compressor end and the first axial position; and a bearing assembly that includes at least one inner race axially located by the outer shoulder of the shaft sleeve and axially located by the lock nut. 1. A turbocharger assembly comprising:{'b': '450', 'a shaft sleeve () that comprises a bore that extends between a compressor end and a turbine end, outer threads that extend to a first axial position from the compressor end, and an outer shoulder at a second, greater axial position from the compressor end;'}{'b': '650', 'a lock nut () that comprises inner threads that mate with the outer threads of the shaft sleeve and an axial length that is less than a distance between the compressor end and the first axial position; and'}{'b': 620', '630, 'a bearing assembly (, ) that comprises at least one inner race axially located by the outer shoulder of the shaft sleeve and axially located by the lock nut.'}2. The turbocharger assembly of wherein the lock nut comprises a set screw that is rotatable to contact the outer threads of the shaft sleeve.3. The turbocharger assembly of wherein the bearing assembly comprises a first inner race claim 1 , a second inner race and an inner ring disposed axially between the first inner race and the second inner race.4. The turbocharger assembly of comprising a shaft received in the bore of the shaft sleeve.5. The turbocharger assembly of comprising a thrust collar and a compressor wheel disposed on the shaft wherein the thrust collar is disposed between the compressor wheel and the shaft sleeve.6. The ...

Method for controlling at least one radial blower in a cooling system, and radial blower

A method for controlling at least one radial blower in a cooling system, wherein the radial blower comprises a housing in which a shaft is rotationally mounted, which receives at least one impeller wheel of a compressor at one end, which is secured to the housing, and the housing comprises at least one radial bearing and at least one axial bearing via which the shaft is rotationally mounted in the housing, and said radial blower also comprises a motor which is driven by a rotor and a stator and which drives the shaft, wherein, by means of at least one laser Doppler vibrometer assigned to the shaft, operating points of the shaft are detected and forwarded to a controller for determining an operating status of the radial blower.

SEAL ARRANGEMENT FOR SUPERCHARGERS

Disclosed is an embodiment of a dual seal arrangement for the high-speed shaft of a supercharger with a centrifugal compressor and a mechanical speed step-down transmission to the shaft. A ring located about the shaft splits the rotational speed of the shaft between two seals, so that each seal spins at a speed of roughly half the speed of the shaft. The arrangement can also be used to split the shaft speed between two bearings in the same manner. The high-speed shaft may also have a turbine attached, to form a driven turbocharger. 1. A supercharger comprising:a shaft;a compressor attached to said shaft;a mechanical speed step-down transmission that transfers power to and from said shaft;a ring located around said shaft and between said mechanical speed step-down transmission and said compressor, said ring being driven by said mechanical speed step-down transmission wherein said ring rotates at a lower speed than, and in a same direction as, said shaft;a first seal located between said ring and a housing of said supercharger,a second seal located between said shaft and said ring;wherein said first seal and said second seal inhibit fluid flow between said compressor and said mechanical speed step-down transmission.2. The supercharger of further comprising:a turbine attached to said shaft.3. The supercharger of further comprising:a second ring located around said shaft and between said mechanical speed step-down transmission and said turbine, said second ring being driven by said mechanical speed step-down transmission, wherein said second ring rotates at a lower speed than, and in a same direction as, said shaft;a third seal located between said second ring and said housing of said supercharger;a fourth seal located between said shaft and said second ring;wherein said third seal and said fourth seal inhibit fluid flow between said turbine and said mechanical speed step-down transmission.4. The supercharger of further comprising:a first bearing located between said ...

DUAL THRUST BEARING FOR A TURBOCHARGER

A dual thrust bearing is disclosed. The dual thrust bearing may have a shell. The shell may extend from a compressor end to a turbine end opposite the compressor end. The shell may have a shell bore extending from the compressor end to the turbine end. The shell bore may be configured to receive a journal bearing. The shell may also have a first thrust bearing face disposed adjacent the compressor end. In addition, the shell may have a second thrust bearing face disposed adjacent the turbine end. 1. A dual thrust bearing , comprising: a shell bore extending from the compressor end to the turbine end, the shell bore being configured to receive a journal bearing;', 'a first thrust bearing face disposed adjacent the compressor end; and', 'a second thrust bearing face disposed adjacent the turbine end., 'a shell extending from a compressor end to a turbine end opposite the compressor end, the shell including2. The dual thrust bearing of claim 1 , whereinthe shell further includes a flange disposed adjacent the compressor end,the flange is configured to attach the dual thrust bearing to a bearing housing, andthe first thrust bearing face is disposed on the flange.3. The dual thrust bearing of claim 2 , wherein the first thrust bearing face includes a plurality of thrust pad sections disposed circumferentially on the first thrust bearing face claim 2 , each thrust pad section extending circumferentially from a leading end to a trailing end and extending radially from an inner wall to an outer wall.4. The dual thrust bearing of claim 3 , wherein the thrust pad sections include:a first thrust pad section;a second thrust pad section; anda drain separating the first thrust pad section from the second thrust pad section, the drain extending radially from adjacent the inner wall to a flange outer surface.5. The dual thrust bearing of claim 4 , wherein the drain has a first axial depth adjacent the inner wall and a second axial depth smaller than the first axial depth adjacent ...

TURBO MACHINE

A turbo machine includes a rotation shaft that comprises a first taper portion and a first cylinder portion, the first taper portion decreasing in diameter toward one end of the rotation shaft, the first cylinder portion being constant in diameter in an axial direction of the rotation shaft; a first impeller that is fixed to the rotation shaft and that is used for compressing or expanding working fluid; a first bearing that rotatably supports the first taper portion and the first cylinder portion; and a second bearing that is positioned on an opposite side of the first impeller from the first bearing in the axial direction of the rotation shaft and that supports the rotation shaft both in the axial direction and a radial direction of the rotation shaft. 1. A turbo machine comprising:a rotation shaft that comprises a first taper portion and a first cylinder portion, the first taper portion decreasing in diameter toward one end of the rotation shaft, the first cylinder portion being constant in diameter in an axial direction of the rotation shaft;a first impeller that is fixed to the rotation shaft and that is used for compressing or expanding working fluid;a first bearing that rotatably supports the first taper portion and the first cylinder portion; anda second bearing that is positioned on an opposite side of the first impeller from the first bearing in the axial direction of the rotation shaft and that supports the rotation shaft both in the axial direction and a radial direction of the rotation shaft.2. The turbo machine according to claim 1 , whereinthe rotation shaft further comprises:a thrust bearing member that is located on the opposite side of the first impeller from the first bearing in the axial direction of the rotation shaft and that comprises a supporting surface which extends toward the radial direction of the rotation shaft; anda second cylinder portion that is located on the opposite side of the first impeller from the first bearing in the axial ...

THREADED CONNECTION FOR TANDEM MOTORS OF ELECTRICAL SUBMERSIBLE PUMP

An electrical submersible pump assembly has modules including a pump, at least one motor, and a pressure equalizer coupled to the motor. First and second ones of the modules have a threaded connection including a first adapter having threads. A second adapter mounted to the second module has a tubular body, a neck of smaller diameter than the body, an external shoulder at a base of the neck, a rim on the neck, and an external groove between the external shoulder and the rim. A collar is rotatably carried and axially movable on the neck, the collar being in threaded engagement with the threads of the first adapter, the collar having an internal groove. A split shoulder ring carried partly in the external groove and partly in the internal groove retains the collar on the neck and is biased into one of the grooves. 1. An electrical submersible pump assembly , comprising:a plurality of modules including a pump, at least one motor, and a pressure equalizer coupled to the motor for reducing a pressure differential between lubricant in the motor and hydrostatic pressure of well fluid;a drive shaft subassembly extending from the at least one motor into the pump along a longitudinal axis of the pump assembly;a threaded connection between first and seconds ones of the modules, comprising:a first adapter mounted to the first one of the modules and having threads;a second adapter mounted to the second one of the modules, the second adapter having a tubular body, a neck of smaller diameter than the body extending from the body, an external shoulder at a base of the neck, a rim on the neck, and an external groove between the external shoulder and the rim;a collar rotatably carried and axially movable on the neck, the collar being in threaded engagement with the threads of the first adapter, the collar having an internal groove; anda shoulder ring carried partly in the external groove and partly in the internal groove to retain the collar on the neck, the shoulder ring being split ...

THRUST COMPENSATION SYSTEM FOR FLUID TRANSPORT DEVICES

A fluid transport device defining a centerline axis therethrough includes at least one rotatable member including a first portion and a second portion axially opposite the first portion. The fluid transport device also includes at least one stationary member positioned proximate the at least one rotatable member. The at least one rotatable member and the at least one stationary member define at least one stage. The at least one rotatable member defines at least one pressure balance port extending from the second portion to the first portion. The at least one pressure balance port is configured to substantially equalize a fluid pressure proximate the second portion with a pressure of a fluid proximate the first portion. 1. A fluid transport device defining an axial centerline therethrough , said fluid transport device comprising:at least one rotatable member comprising a first portion and a second portion axially opposite said first portion; andat least one stationary member positioned proximate said at least one rotatable member, wherein said at least one rotatable member and said at least one stationary member define at least one stage, said at least one rotatable member defining at least one pressure balance port extending from said second portion to said first portion, said at least one pressure balance port configured to substantially equalize a fluid pressure proximate said second portion with a pressure of a fluid proximate said first portion.2. The fluid transport device in accordance with claim 1 , wherein said fluid transport device comprises a single stage.3. The fluid transport device in accordance with claim 1 , wherein said fluid transport device is a multi-stage fluid transport device comprising:a first stage comprising a first rotatable member and a first stationary member, said first rotatable member comprising a first inlet portion and a first outlet portion axially opposite said first inlet portion; and a pressure balance port extending between ...

BALANCING SYSTEM AND METHOD FOR TURBOMACHINE

The balancing system has a balancing body to be mounted on a rotor of a turbomachine and a sealing ring to be mounted on a stator of the turbomachine; the sealing ring is arranged around the balancing body so that the balancing body can rotate about a rotation axis, thus there is a clearance between the body and the ring; furthermore, there is an arrangement for changing an axial position of the sealing ring during operation of the turbomachine so that the clearance can be adjusted. The possibility of adjusting clearance during operation of the turbomachine, such balancing system provides a good balancing action with a small leakage and a small risk of mechanical interference at any time during operation of the turbomachine. 2. The balancing system of claim 1 , wherein an inner surface of the sealing ring is frustum shape.3. The balancing system of claim 1 , wherein an outer surface of the portion of the balancing body is frustum shape.4. The balancing system of claim 1 , further comprising a control unit arranged to control the arrangement so to adjust the clearance.5. The balancing system of claim 4 , wherein the control unit is arranged to perform an open-loop control or a closed-loop control.6. The balancing system of claim 1 , wherein the arrangement comprises an actuator being electric-type or a magnetic-type or a hydraulic-type or a pneumatic-type.7. The balancing system of claim 1 , wherein the balancing body has a first surface and a second surface claim 1 , wherein the balancing body is arranged so that a fluid at a first pressure exerts a force on the first surface and pushes the balancing body axially in a first sense and a fluid at a second pressure exerts a force on the second surface and pushes the balancing body axially in a second sense claim 1 , the second sense being opposite to the first sense.8. A turbomachine comprising a balancing system according to claim 1 , wherein the balancing body is fixed to a shaft of the turbomachine.9. A method of ...

Threaded Connectors Between Submersible Well Pump Modules

An electrical submersible pump assembly has modules including a pump, a motor, and a pressure equalizer. A first adapter having threads is mounted to one of the modules. A second adapter is mounted to an adjacent one of the modules, the second adapter having a tubular body, a neck, and an external shoulder at a base of the neck. A collar is rotatably carried on the neck and in threaded engagement with the threads of the first adapter. A clamp secures around the neck between the external shoulder and the collar after the collar is fully engaged with the threads on the first adapter. A pair of flanges are mounted to and extend outward from the clamp. A motor lead locates between the flanges. 1. An electrical submersible pump assembly , comprising:a plurality of modules including a pump, a motor, and a pressure equalizer mounted to the motor for reducing a pressure differential between lubricant in the motor and hydrostatic pressure of well fluid;a threaded connection between at least two of the modules, comprising:a first adapter having threads;a second adapter having a tubular body, a neck of smaller diameter than the body, and an external shoulder at a junction of the neck with the body;an external shoulder ring on the neck;a collar rotatably carried on the neck and in threaded engagement with the threads of the first adapter, the collar having an abutment surface that abuts against the shoulder ring; anda collar retainer that secures to the neck between the external shoulder and the collar after the collar is fully engaged with the threads of the first adapter to prevent the collar from unscrewing from the threads during operation of the assembly.2. The assembly according to claim 1 , wherein:the collar retainer comprises a clamp that secures around the neck.3. The assembly according to claim 1 , wherein:the collar has a second adapter end axially spaced from the external shoulder by a selected distance when the collar is fully engaged with the threads; andthe ...

METHOD FOR MOMENTARY HYDROSTATIC OPERATION OF HYDRODYNAMIC THRUST BEARINGS IN A VERTICAL FLUID DISPLACEMENT MODULE

A method for axial support of a pump or compressor rotor shaft during start-up or shut-down of a vertical fluid displacement module for subsea operation including a motor and a pump or compressor. Lubrication fluid is momentarily supplied for hydrostatic operation of hydrodynamic thrust bearing(s) from a topside or land-based fluid supply via a flow control module arranged in conjunction with a subsea pressure control unit configured for controlling the supply and discharge of barrier and lubrication fluids to/from the fluid displacement module. 110-. (canceled)11. A method for axial support of a pump or compressor rotor shaft during start-up or shut-down of a vertical fluid displacement module for subsea operation comprising a motor and a pump or compressor , the method comprising:momentarily supplying lubrication fluid for hydrostatic operation of hydrodynamic thrust bearing(s) from a topside or land-based fluid supply via a flow control module arranged in cooperation with a subsea pressure control unit configured for controlling the supply and discharge of barrier and lubrication fluids to/from said fluid displacement module.12. The method according to claim 11 , wherein the pressure control unit is operated to generate a fluid film flow between tilted pads of the thrust bearing and opposing axial faces on rotors in the pump or compressor claim 11 , and wherein operation of the pressure control unit comprises discharge of barrier/lubrication fluid from the pressure control unit to a process fluid flow.13. The method according to claim 11 , further comprising:temporarily operating a flow control valve arranged in a thrust bearing lubrication fluid supply line connected to the hydrodynamic thrust bearing(s) in the pump or compressor.14. The method according to claim 11 , further comprising:electrically controlling the flow control module from a topside control.15. The method according to claim 11 , further comprising:controlling the supply pressure in the thrust ...

DOWNHOLE BLOWER SYSTEM WITH PIN BEARING

This disclosure describes various implementations of a downhole-blower system that can be used to boost production in a wellbore. The downhole-blower system includes a blower and an electric machine coupled to the blower that can be deployed in a wellbore, and that can, in cooperation, increase production through the wellbore. 1. A downhole-type blower system comprising:a housing;a stator within the housing;a rotor carried by and supported to rotate within the housing;a plurality of bearings supporting the rotor to rotate within the stator;a thrust bearing at an end of the rotor; and a lubrication reservoir configured to contain a bearing lubricant; and', 'a flow path fluidically connecting the lubrication reservoir and the thrust bearing, the lubrication reservoir configured to be pressurized to provide the bearing lubricant to the thrust bearing., 'a lubrication system within the housing to lubricate the thrust bearing, the lubrication system comprising;'}2. The downhole-type blower system of claim 1 , wherein the plurality of radial bearings comprise passive magnetic repulsion bearings.3. The downhole-type blower system of claim 2 , wherein the passive magnetic repulsion bearings are biased to provide an axial pre-load on the thrust bearing.4. The downhole-type blower system of claim 1 , wherein the thrust bearing comprises a pin bearing.5. The downhole-type blower system of claim 4 , wherein the pin bearing comprises;a curve-shaped rotor extension positioned axially on an end of the rotor; anda curved recess configured to receive the rotor extension.6. The downhole-type blower system of claim 4 , wherein the pin bearing comprises:a ball;a rotor indentation on an end of the rotor, the rotor indentation configured to receive the ball; anda thrust indentation opposite the rotor indentation configured to receive the ball.7. The downhole-type blower system of claim 1 , wherein the lubrication system further comprises:a spring configured to apply pressure to the ...

DOWNHOLE BLOWER SYSTEM WITH BEARINGS AND SEALS

This disclosure describes various implementations of a downhole-blower system that can be used to boost production in a wellbore. The downhole-blower system includes a blower and an electric machine coupled to the blower that can be deployed in a wellbore, and that can, in cooperation, increase production through the wellbore. 1. A downhole-type blower system comprising: a segmented fluid stator comprising a plurality of axially stacked, clamped together stator segments defining an exterior surface of the blower;', 'a fluid rotor within the stator; and', 'a plurality of bearing assemblies axially arranged along the rotor, the bearing assemblies supporting the rotor to rotate within the stator., 'a blower configured to be placed in a wellbore, the blower comprising2. The downhole-type blower system of claim 1 , further comprising a plurality of seals configured to seal the plurality of bearing assemblies from a downhole environment claim 1 , the plurality of seals comprising a labyrinth seal.3. The downhole-type blower system of claim 2 , wherein the labyrinth seal comprises grease packed within a gap in the labyrinth seal.4. The downhole-type blower system of claim 3 , wherein the grease is configured to maintain lubrication and sealing properties in a downhole environment.5. The downhole-type blower system of claim 1 , wherein the plurality of bearing assemblies comprise ball bearing assemblies.6. The downhole-type blower system of claim 5 , wherein a ball bearing assembly comprises a thrust bearing or a radial bearing.7. The downhole-type blower system of claim 6 , wherein a ball bearing assembly of the plurality of ball bearing assemblies comprises a soft material configured to lubricate the ball bearing assembly.8. The downhole-type blower system of claim 7 , wherein the soft material comprises a lead alloy or graphite.9. The downhole-type blower system of claim 7 , wherein the ball bearing assemblies are unsealed.10. The downhole-type blower system of claim 1 , ...

Recirculation Stall in Compressor Insert or Backplate

In a turbocharger for receiving exhaust gas from an internal combustion engine and for delivering compressed air to the internal combustion engine, a backplate may include a lubricant stall protrusion, such as a rib, may be placed in recirculation or collection recesses of the backplate to stall recirculating lubricant flow and direct the lubricant into a bearing housing lubricant core and drain to reduce an amount of lubricant proximate piston rings and leaking into a compressor housing of the turbocharger. When an lubricant deflector is used, the lubricant stall protrusion stalls recirculating lubricant that is outboard of the lubricant deflector, and may have an outer protrusion edge closely matching the outboard contour of the lubricant deflector to minimize a flow gap there between.

TURBINE AND THRUST LOAD ADJUSTING METHOD

According to an embodiment, a turbine comprises: a casing; a rotor shaft; turbine stages; a thrust bearing which receives thrust load in the axial direction generated by a flow of a working fluid supplied to the turbine stages; a balance piston which is formed on the rotor shaft along a circumferential direction and projects in a radial direction from the rotor shaft, for adjusting a thrust contact pressure; and a thrust load adjusting mechanism which applies pressures of a pressure-increasing side and a pressure-decreasing side to at least one of a balance piston inner-side chamber and a balance piston outer-side chamber which sandwich the balance piston in the axial direction. 1. A turbine comprising:a casing;a rotor shaft penetrating the casing;a plurality of turbine stages arranged in the casing along an axial direction of the rotor shaft;a thrust bearing which receives thrust load in the axial direction generated by a flow of a working fluid supplied to the turbine stages;a balance piston which is formed on the rotor shaft along a circumferential direction and projects in a radial direction from the rotor shaft, for adjusting a thrust contact pressure applied to the thrust bearing; anda thrust load adjusting mechanism which applies pressures of a pressure-increasing side and a pressure-decreasing side to at least one of a balance piston inner-side chamber and a balance piston outer-side chamber which sandwich the balance piston in the axial direction.2. The turbine according to claim 1 ,wherein the thrust load adjusting mechanism comprises:a low pressure-side pipe connected to a low-pressure region;a high pressure-side pipe connected to a high-pressure region;a low pressure-side control valve disposed on the low pressure-side pipe;a high pressure-side control valve disposed on the high pressure-side pipe; anda controller which outputs an opening/closing command to the low pressure-side control vale and the high pressure-side control valve,wherein the low ...

Centrifugal compressor and turbocharger including the same

A centrifugal compressor includes: a housing; an impeller rotatably disposed within the housing; a rotational shaft connected to the impeller; and a bearing member supporting the rotational shaft in the housing. An oil flow passage through which oil flows is formed in the housing. The oil flow passage includes a lubricating oil passage through which the oil flows as lubricating oil to be supplied to the bearing member, and a cooling oil passage through which the oil flows as cooling oil for heat exchange with a fluid compressed by the impeller. The cooling oil passage is configured so that the oil flows into the cooling oil passage as the cooling oil without passing through the bearing member.

DEVICE FOR GENERATING A DYNAMIC AXIAL THRUST TO BALANCE THE OVERALL AXIAL THRUST OF A RADIAL ROTATING MACHINE

An impeller wheel assembly for a radial rotating machine, comprises a bladed hub portion of an impeller wheel, with a first radially outward facing, fluid deflecting surface having a curvature profile designed to deflect an axial fluid flow into a radial centrifugal flow, and comprising a deflector portion with a second radially outward facing, fluid deflecting surface. The second radially outward facing surface has a curvature profile designed to deflect a radial centripetal fluid flow into an axial fluid flow. 1. A radial rotating machine for processing a fluid , the radial rotating machine comprising:one or more impeller wheels attached to a same shaft, each with a bladed hub portion, each bladed hub portion comprising a first radially outward facing, fluid deflecting surface having a curvature profile designed to deflect an axial fluid flow into a radial centrifugal flow;a shroud assembled around each hub portion so as to trap an axial fluid flow reaching the bladed hub portion and to force the axial fluid flow along the first outward facing surface;a stator comprising a guiding passage for a fluid coming from between the shrouds and the first outward facing surface, the guiding passage comprising, after each impeller wheel, a centrifugal diffuser portion followed by a bend, then followed by a centripetal return channel portion; andat least a at least one deflector portion with a second radially outward facing, fluid deflecting surface inserted into a fluid flow path, rotating together with the shaft, and having a curvature profile designed to deflect a radial centripetal fluid flow into an axial fluid flow,wherein the number of the at least one deflector, portion is the same as the total number of the one or more impeller wheels attached to the shaft.2. The radial rotating machine according to claim 1 , wherein a deflector portion is placed upstream of each bladed hub portion.3. The radial rotating machine according to claim 1 , wherein at least a deflector ...

FAN

A blower fan includes a heat source contact portion. A side wall portion includes a tongue portion. In a plan view, The heat source contact portion is arranged to cover a portion of a region surrounded by a third imaginary straight line tangent to an outer circumferential surface of a blade support portion and extending in parallel with the second imaginary straight line toward the air outlet in the first region, a fourth imaginary straight line tangent to the outer circumferential surface of the blade support portion and extending in parallel with the first imaginary straight line in the third region, the outer circumferential surface of the blade support portion, and the air outlet. 1. A blower fan comprising:an impeller including a plurality of blades arranged to rotate about a central axis extending in a vertical direction and arranged in a circumferential direction, and an annular blade support portion arranged to support the blades;a motor portion arranged to rotate the impeller; anda housing arranged to contain the impeller; wherein a lower plate portion arranged to cover a lower side of the impeller, and arranged to support the motor portion;', 'a side wall portion arranged to cover a lateral side of the impeller, and including at least one opening each of which opens into an exterior space outside the blower fan, each of the at least one opening extending over a circumferential extent; and', 'an upper plate portion arranged to cover an upper side of the impeller, and including an air inlet;, 'the housing includesthe upper plate portion, the side wall portion, and the lower plate portion are arranged to together define an air outlet on the lateral side of the impeller;a space joining a space above the impeller and a space between the impeller and the lower plate portion to each other in an axial direction is defined between adjacent ones of the blades of the impeller;the blower fan further comprises a heat source contact portion with which a heat source is ...

TURBOCHARGER HAVING THRUST BEARING WITH BIASED OIL FLOW

A turbocharger includes a turbine wheel, a compressor wheel, a shaft coupled to the turbine wheel and the compressor wheel, and a thrust bearing. The thrust bearing includes a loaded side and an unloaded side. The loaded side bears a majority of axial loading caused by force imbalances between the turbine wheel and the compressor wheel during engine startup. The thrust bearing restricts oil flow to the unloaded side as compared to the loaded side during engine startup. 1. A turbocharger comprising:a turbine wheel, a compressor wheel, and a shaft coupled to the turbine wheel and the compressor wheel; anda thrust bearing having a loaded side and an unloaded side, the loaded side bearing a majority of axial loading caused by force imbalances between the turbine wheel and the compressor wheel during engine startup, wherein the thrust bearing restricts oil flow to the unloaded side as compared to the loaded side during engine startup.2. The turbocharger according to claim 1 , wherein the thrust bearing includes an oil inlet claim 1 , one or more loaded side outlets claim 1 , a loaded side circumferential channel configured to distribute oil from the oil inlet to the loaded side outlets claim 1 , one or more unloaded side outlets claim 1 , and an unloaded side circumferential channel configured to distribute oil from the oil inlet to the unloaded side outlets claim 1 , wherein the unloaded side circumferential channel is a flow restricting channel.3. The turbocharger according to claim 2 , wherein the unloaded side circumferential channel is at least one of elongated or smaller in cross-sectional size as compared to the loaded side circumferential channel.4. The turbocharger according to claim 3 , wherein the unloaded side circumferential channel is elongated in a serpentine manner.5. The turbocharger according to claim 3 , wherein the unloaded side circumferential channel is smaller in cross-sectional size as compared to the loaded side circumferential channel.6. The ...

TURBO COMPRESSOR

A turbo compressor includes a first compressor stage, which has a first compressor wheel, and a second compressor stage, which has a second compressor wheel, the first compressor wheel and the second compressor wheel being situated on a common shaft (), the shaft being supported without contact. To reduce the complexity of the turbo compressor, a contactless bearing of the shaft is situated between the first compressor wheel and the second compressor wheel. 111-. (canceled)12. A turbo compressor , comprising:a first compressor stage having a first compressor wheel;a second compressor stage having a second compressor wheel;wherein the first compressor wheel and the second compressor wheel are situated on a common shaft, which is supported without contact, andwherein a contactless bearing of the shaft is situated between the first compressor wheel and the second compressor wheel.13. The turbo compressor of claim 12 , wherein the contactless bearing is a magnetic bearing.14. The turbo compressor of claim 12 , wherein the shaft is only supported with the aid of the contactless bearing.15. The turbo compressor of claim 12 , wherein the first compressor wheel and the second compressor wheel are aligned so that the respective inlets of the compressor stages are situated on diametrically opposed sides of the shaft.16. The turbo compressor of claim 15 , wherein the compressor wheels have essentially the same distance to the bearing.17. The turbo compressor of claim 12 , wherein the bearing includes a combined claim 12 , contactless radial and axial bearing.18. The turbo compressor of claim 17 , wherein the bearing has a radially projecting flange on the shaft side claim 17 , the flange being at least partly enclosed axially by housing-side bearing components.19. The turbo compressor of claim 12 , wherein at least one of an electrical drive and a generator are integrated into the bearing.20. The turbo compressor of claim 19 , wherein the shaft has a cavity claim 19 , which is ...

SUBSEA CENTRIFUGAL COMPRESSOR WITH HORIZONTAL SHAFT AND WITH ONLY ONE AXIAL THRUST BEARING

A centrifugal compressor unit including a motor having a rotor, at least one compressor having a shaft driven by the rotor; and a set of bladed wheels fitted on the driven shaft, the motor and the compressor being mounted in a common watertight casing. It further includes cooling means for cooling the motor, the cooling means having a gas cooler outside the casing. In operation, the motor, the compressor and the casing having the motor and the compressor are arranged horizontally, one axial thrust bearing only being provided on a compressor side. 1. A subsea centrifugal compressor unit , comprising:a motor having a rotor,at least one compressor having a shaft driven by the rotor; anda set of bladed wheels fitted on the driven shaft,the motor and the compressor being mounted in a common watertight casing, and further comprising cooling means for cooling the motor, the cooling means having a gas cooler outside the casing,wherein, in operation, the motor, the compressor and the casing having the motor and the compressor are arranged horizontally, and in that it further comprises one axial thrust bearing only on a compressor side.2. The subsea centrifugal compressor unit according to claim 1 , wherein the rotor and the driven shaft form one common shaft claim 1 , the compressor unit having a set of three radial bearings for supporting the shaft claim 1 , two bearings being provided on the motor side and one bearing being provided on the compressor side.3. The subsea centrifugal compressor unit according to claim 1 , wherein the rotor and the driven shaft are connected by means of a flexible coupling that is tortionally flexible and axially unflexible claim 1 , and further comprising a set of four radial bearings for supporting each end of the rotor and the driven shaft.4. The subsea centrifugal compressor unit according to claim 2 , wherein the radial bearings for supporting the driven shaft or the rotor are magnetic bearings.5. The subsea centrifugal compressor unit ...

CENTRIFUGAL COMPRESSOR

Provided is a centrifugal compressor, including: a impeller; a wall portion having an opposed surface that is spaced apart from and opposed to a back surface of the impeller; an insertion hole, which is formed in the wall portion, and is configured to receive a shaft inserted to the insertion hole; a bearing, which is provided in the insertion hole or apart from the impeller with respect to the insertion hole, and is configured to axially support the shaft through interposition of grease being a lubricant inside; an electric motor which is provided on a side opposite to the impeller over the wall portion; and an opposed hole, which is formed in the wall portion, and has one end opened in the opposed surface and another end opened at a position opposed to a stator of the electric motor on a side opposite to the impeller. 1. A centrifugal compressor , comprising:an impeller which is provided to a shaft;a wall portion having an opposed surface that is spaced apart from and opposed to a back surface of the impeller;an insertion hole, which is formed in the wall portion, and is configured to receive the shaft inserted to the insertion hole;a bearing, which is provided in the insertion hole or apart from the impeller with respect to the insertion hole, and is configured to axially support the shaft through interposition of grease being a lubricant inside;an electric motor which is provided on a side opposite to the impeller over the wall portion; andan opposed hole, which is formed in the wall portion, and has one end opened in the opposed surface and another end opened at a position opposed to a stator of the electric motor on a side opposite to the impeller.2. A centrifugal compressor according to claim 1 , wherein the opposed hole has a plurality of opening portions on the opposed surface side claim 1 , and the plurality of opening portions are formed apart in a circumferential direction of the shaft.3. A centrifugal compressor according to claim 1 , wherein the ...

Thrust bearing placement for compressor

A compressor includes a shaft, a motor configured to drive the shaft into rotation, and a thrust bearing configured to permit rotation of the shaft and support an axial load of the shaft. The thrust bearing is positioned about the shaft and between the motor and an impeller of the compressor.

TURBOCHARGER THRUST BEARING AND MANUFACTURING METHOD

A thrust bearing, particularly for a turbocharger, having unique configurations on the thrust pad faces, including free-form curvatures or non-linear configurations defined by a geometric equation. The thrust pad faces can be configured by a programmed linear actuator system and cutting tool. 1. A fluid-film thrust bearing comprising:a disc member having a first surface on one side and a second surface on an opposite side from said first surface;said first surface having a plurality of thrust pad members thereon, each of said thrust pad members having an outer axial oriented surface;each of said outer axial oriented surfaces having a curved profile configuration on at least a portion thereof; said curved profile configuration extending perpendicular to said first surface and being defined by a non-linear geometric equation.2. The fluid-film thrust bearing as set forth in further comprising a central opening in said disc member claim 1 , wherein said disc member can be positioned on a shaft member claim 1 , and wherein said thrust pad members have a wedge-shaped configuration.3. The fluid-film thrust bearing as set forth in wherein said thrust pad members are arranged in a circular orientation on said first surface claim 1 , and said thrust bearing is a turbocharger thrust bearing.4. The fluid-film thrust bearing as set forth in further comprising a plurality of fluid channels positioned on said first surface claim 1 , wherein a fluid can be applied to said thrust pad members on said first surface.5. The fluid-film thrust bearing as set forth in wherein said second surface has said thrust pad members thereon.6. The fluid-film thrust bearing as set forth in wherein each of said thrust pad members on said second surface has a wedge-shape configuration with an outer surface having a curved profile configuration.7. The fluid-film thrust bearing as set forth in wherein said curved profile configuration on the outer surfaces of said thrust pad members on said second ...

Rotary machine

A rotary machine is provided with a plurality of impellers ( 3 ) which have a disk ( 31 ) rotating with a rotary shaft ( 2 ), the impellers being arranged side by side; and a casing ( 4 ) in which a casing flow passage ( 43 ) is formed to distribute a working medium therein. An impeller ( 3 ) disposed farthest away from a second side in the axial direction is disposed in a space communicating with an upstream part of the casing flow passage ( 43 ), and a protrusion portion ( 5 ) protruding from a back side ( 311 ) of the disk ( 31 ). The protrusion portion ( 5 ) has a sealing surface ( 51 ) which is formed to be parallel to an outer surface ( 21 ) of the rotary shaft ( 2 ) to seal a gap between itself and the casing ( 4 ), and a pressure receiving surface ( 51 ) which extends from the outer surface ( 21 ) to the sealing surface ( 51 ).

Compressor configured to control pressure against magnetic motor thrust bearings

A method of controlling, by a controller for a compressor (200), pressure at plurality of magnetic motor thrust bearings (360, 370) for a motor (280) disposed within a housing (220) for the compressor (200), wherein the motor (280) and an impeller (270) are disposed on a compressor shaft (260) within the housing, the method including: monitoring current at each of the plurality of magnetic motor thrust bearings (360, 370), controlling a flow regulator (400) in a bypass loop (380) for the impeller (270) to decrease flow through the bypass loop when a first current in a first of the plurality of magnetic motor thrust bearings (360, 370) exceeds a second current in a second of the plurality of magnetic motor thrust bearings (360, 370), and controlling the flow regulator (400) to increase flow through the bypass loop (380) when the second current exceeds the first current.

ROTOR AND VACUUM PUMP EQUIPPED WITH SAME

A rotor of a vacuum pump has first and second cylindrical bodies and a connecting portion for connecting the end portions of the cylindrical bodies together. The first cylindrical body has a plurality of rotor blades on an outer circumferential surface thereof, and configures a blade exhaust portion when the rotor blades are arranged along an axial center of the vacuum pump alternately with a plurality of stator blades. The second cylindrical body configures a threaded groove exhaust portion when a threaded groove exhaust flow passage is formed at least on an inner circumference of the second cylindrical body. In this rotor, a balancing portion for the rotor is provided on an inner circumferential surface of the first cylindrical body or the connecting portion, and mass adding means is provided in the balancing portion. 1: A rotor of a vacuum pump for exhausting gas from a chamber , the rotor comprising:a first cylindrical body;a second cylindrical body; anda connecting portion that connects end portions of the first and second cylindrical bodies together, wherein:the first cylindrical body comprises a plurality of rotor blades on an outer circumferential surface thereof, and configures a blade exhaust portion when the rotor blades are arranged along an axial center of the vacuum pump alternately with a plurality of stator blades,the second cylindrical body configures a threaded groove exhaust portion when a threaded groove exhaust flow passage is formed at least on an inner circumference of the second cylindrical body, anda balancing portion for the rotor is provided on an inner circumferential surface of the first cylindrical body or the connecting portion, the balancing portion being provided with mass adding means.2: The rotor according to claim 1 , wherein the balancing portion has an inner diameter larger than that of the first cylindrical body claim 1 , the inner diameter of the balancing portion being constant or becoming greater toward a lower portion ...

Bearing structure and turbocharger

A bearing structure S includes: a bearing hole formed in a housing; a main body portion of a bearing provided in the bearing hole and inserted with a shaft therethrough; damper surface and provided on an outer circumferential surface of the main body portion, the damper surface facing an inner circumferential surface of the bearing hole; thrust surface provided at end portions of the main body portion in an axial direction of the shaft; and thrust back surface portions provided in the main body portion and having an outer diameter larger than those of the damper surface, the thrust back surface portions spaced apart from the damper surface by a distance farther than a distance between each of the damper surface and the inner circumferential surface of the bearing hole and positioned on back sides of the thrust surface.

Orifice plate bearing lubrication system

A thrust control assembly for use in a horizontal pumping system includes a thrust bearing chamber that is filled with a fluid lubricant, a thrust bearing assembly contained within the thrust bearing chamber, a first radial bearing chamber, a first radial bearing assembly contained within the first radial bearing chamber and a first metering assembly. The first metering assembly controls the flow of lubricant from the thrust bearing chamber to the first radial bearing chamber. The first metering assembly may include an orifice plate.