Abstract: A magnetic pump comprises a front casing (1) for forming an interior pump space (2) and having an inlet (3) for drawing in a fluid to be pumped and an outlet (4) for discharging the fluid, a rear casing (6) for forming a cylindrical space (5) extending from the pump space (2), a supporting shaft (7) having a rear end supported by a rear end of the rear casing (6) and a front end facing to the pump space (2), and a rotator (10) rotatably supported by the supporting shaft (7). The rotator (10) includes a totally cylindrical magnetic can (13) having an inner circumference on which a cylindrical rotary bearing mounted and an outer circumference on which a driven magnet is mounted, and an impeller (14) secured on a front end of the magnetic can (13) and accommodated in the pump space (2) so as to rotate integrally with the magnetic can (13). A rear bearing (19) is located at a rear end of the rotary bearing (11) via a cushion member (18).

Abstract: A balancing arrangement which is used to relieve or take up axial thrust in a multistage centrifugal pump, having a balancing device with at least one axial gap (8) and at least one radial gap (6,7) and in which a balancing flow is conducted through the gaps, and having an axial bearing which receives remaining axial thrust. Associated with the axial bearing is a cardanic ring (10) which serves to offset alignment errors. Highly reliable operation with only low leakage losses is achieved by configuring the balancing device such that a residual thrust in the direction of the suction side of the pump exists in all operating conditons and the cardanic ring is designed such that it is elastically deformed by the residual thrust and has a spring constant such that the axial gap (s) will close from a maximum width position when the pump is at rest to a minimum width position during operation while still avoiding contact between the surfaces which define the axial gap.

Abstract: A shaft load balancing system includes a housing divided into a first chamber at a first operating pressure and a second chamber at a second, lower operating pressure. A shaft passes from the first chamber into the second chamber. The shaft includes a first end in the first chamber, a second end in the second chamber, and a substantially axial channel connecting the first end and the second end. The first end is in fluid communication with a fluid reservoir in the housing. A reaction member engages the second end. The reaction member includes a compression volume in fluid communication with the channel. A pressure differential between the chambers forces fluid from the fluid reservoir through the channel and into the compression volume. The reaction member transmits the fluid force to the housing, allowing the fluid to create a force on the second end of the shaft. In one embodiment, the reaction member is axially movable on the shaft and rotatable with respect to the housing.

Abstract: A compressor that generates relatively little noise and prevents partial clutch engagement and gas leakage when the inclination of a cam plate is suddenly decreased by a great amount. The compressor includes a control valve that electrically controls the compressor displacement based on external information. The rear end of a drive shaft is supported by a shaft bore formed in a cylinder block. A stopper is located endwise of the drive shaft to limit axial movement of the drive shaft. The stopper may be very stiff spring or a rigid member.

Abstract: A water-cooled pump motor for delivering potable water in a demand system includes a centrifugal pump including a volute and an impeller in the volute, an electric motor driving the impeller having a hollow rotor shaft, a rotor on the shaft, bearings supporting the rotor shaft, a stator coaxially outward of the rotor, two water impervious liners, one located within the stator and the other coaxially outside the rotor, the liners being spaced to define a cylindrical passageway across the rotor and a cooling and lubricating water passageway for water to flow through the motor including flow from the impeller between the rotor shaft and the bearings, across the cylindrical passageway and through the hollow rotor shaft back into the volute.

Abstract: A thrust compensation apparatus for high-speed rotating machinery includes an electromagnetic thrust bearing having a thrust rotor and a thrust stator, a first chamber filled with a pressurized medium on one side of the bearing, and a second chamber on the other side of the bearing. The pressure differential across the bearing augments the electromagnetic force between the rotor and stator in order to counteract the axial thrust load of the high-speed rotating machinery.

Abstract: A tube pump in which the rotor is axially supported by permanent magnets at each end, so arranged as to apply attractive force across the gap between the rotor and a stator such that permanent magnets provide the sole radial support for the rotor. The axially effective permanent magnets are provided in conjunction with an electromagnetic stabilizer restoring the axial position of the rotor upon a shaft toward one or the other of the opposite ends thereof.

Abstract: A magnet pump with bi-directional axial self-alignment comprises an inner chamber (12), provided with a suction duct (13) and a delivery duct (14); an impeller (25) located in said chamber (12) in a rotatably and axially movable manner, and having, a front portion (26) oriented towards the suction duct (13); a driven rotor (31) integral with the motor spindle (51), located outside said chamber (12) and bearing magnets (34) cooperating with as many driven magnets (35) facing the same, located in the rear portion (27) of impeller (25), and a magnet (41) fixed in the inside of said chamber (12) and cooperating with a second magnet (42), incorporated in said impeller (25) so as to realize a linear magnetic coupling.

Abstract: A rotary pump (PP) for taking in a liquid such as a hydrocarbon comprises a pump wheel (1) secured to a rotor (4) which is immersed in a portion of the liquid taken in by the pump. A motor (11) having a stator element (111) mounted in a case (5) and a rotor element (110) mounted on the rotor (4) serves to cause the rotor (4) to rotate about an axis (40). Radial magnetic bearings (7, 8) and axial magnetic bearings (9, 10) support and guide the rotor (4) inside an enclosure (6). A jacket (61) is provided to protect the stator element (111) of the motor (11) from the liquid. The pump is characterized in that the rotor (4) has at least one groove (45, 46) in an outer surface that is covered by the liquid, particularly to reduce the inertial effects due to the liquid.

Abstract: A hydraulic pressure booster includes a housing having a pump portion, a shaft portion and a turbine portion. The pump portion has a pump inlet and a pump outlet. The turbine portion has a turbine inlet and a turbine outlet. The turbine portion and pump portion are fluidically separated by the shaft portion. A shaft is supported by a bearing within the shaft support portion. The shaft extends between the pump portion and turbine portion and has a pump impeller and a turbine impeller located in its respective portion. The shaft defines an axis of the housing. A thrust load reducer is provided within the turbine portion to reduce axial thrust toward the thrust bearing.

Abstract: Air-bearing fan includes a dust-proof cover, a fan blade structure, a magnet, a stator, a sleeve, an electronic circuit board, a housing and a thrust disk. While the fan blade structure is rotating, air can be induced into a ring-shaped gap so that an air-bearing is formed. And, air is also induced into a thrust gap and forms a thrust bearing. Therefore, this invention significantly reduces the noise and increases the fan's rotating speed, fan capacity and life.

Abstract: A pump includes a front casing and a rear casing for defining a space therebetween. An end of the shaft extends into the space with an impeller is supported by a bushing which makes the impeller is rotatable in the space. A wearing ring is attached to a front side of the impeller. The front casing defines a bore in which a buffer is received so as to be axially movable with respect thereto. A thrust ring is attached to the buffer for contactingly engaging the wearing ring whereby when the impeller rotates, the axial movement of the buffer maintains a fluid film between the thrust ring and the wearing ring. An O-ring is mounted to the buffer for providing a buffer function between the buffer and the bore thereby helping maintaining the fluid film.

Abstract: In accordance with a preferred embodiment of the invention, a centrifugal pump includes a housing having a housing cavity, an inlet, and an outlet. A shaft is located in the housing cavity. A radial bearing coaxially surrounds the shaft. The shaft and the radial bearing are rotatable with respect to one another. The impeller includes an impeller hub within an opening and an impeller recess for receiving the radial bearing. A thrust balancing valve is associated with the impeller hub to define a variable orifice for fluidic communication with the inlet. A wall for containing the pumped fluid has an interior surface with different elevations for inhibiting rotational flow and reducing angular velocity of the fluid. The interior surface is disposed adjacent to a rear portion of the impeller.

Abstract: The invention relates to a mounting for a turbo-machine rotor. Said mounting is characterized in that radial support of the rotor is assured by one or more permanent magnet bearings. One or more single-thrust sliding bearings provide axial support. The permanent magnet bearings also serve as a lifting device for the sliding surfaces of the hydrodynamic sliding bearings. A force, acting in the opposite direction from the axial force, is generated by axial displacement of the rotor-sided bearing elements of the permanent magnet bearing, in relation to the housing-sided bearing elements, counter to the direction of axial force. This force separates the sliding surfaces of the hydrodynamic sliding bearings from each other in the stopping phases of the rotor. Once it has come to a stop, and when it is in the starting and stopping phases, the rotor is guided by one or more sliding or rolling bearings.

Abstract: A thrust control system for use with a turbocompressor having gas bearings. More specifically, the system concerns an arrangement of gas bearings for use in a turbocompressor or other device where a large temperature difference between the turbine and the compressor housing could cause unacceptable performance of the turbocompressor thrust bearings if located in proximity of the turbine and compressor wheels. This danger is obviated in the system by relocating the gas thrust bearings so as to minimize the axial distance between them. This configuration affords the additional advantage that gasses of different composition may be separately used as a seal gas in cases where the process gas in the turbine and compressor are incompatible.

Abstract: A magnetically levitated blood pump having a single inlet for accepting blood and tangential volute. The pump includes an impeller formed on a hub that is suspended radially by permanent magnet bearings and axially adjusted via and thrust coil. The hub is rotated by an axial gap permanent magnet DC motor having motor magnets mounted on the hub adjacent to the impeller, a stator formed in the area opposite to the motor magnets, and motor coils formed on the stator. The axial air gap of the motor is formed in the impeller blade path. The motor may have two separate stator members. The current in the thrust coil is controlled by feedback of the impeller axial position measured by sensors. The pump components are compactly configured within a housing.

Abstract: A low pressure-side first-stage compressor impeller and a high pressure-side second-stage compressor impeller are mounted respectively on opposite ends of a rotation shaft. A rotor of an electric motor for driving the two impellers is formed at a central portion of the rotation shaft. A stator of the motor is held by a motor casing. The motor casing, a first-stage compressor casing, which cooperates with the first-stage compressor impeller to form a first-stage compressor, and a second-stage compressor casing, which cooperates with the second-stage compressor impeller to form a second-stage compressor, are cast into an integral construction. This integral casing is further formed integrally with an intermediate cooler, disposed downstream of the first-stage compressor, and a discharge cooler disposed downstream of the second-stage compressor.

Abstract: A cooling system is simple in structure, efficient, and durable due to a lowered burden on bearings and reduced loss of drive power. The cooling system includes a compressor having a first rotor for compressing air, a cooler for cooling high-temperature, high-pressure air delivered form the compressor, and an expander having a second rotor for effecting adiabatic expansion of air cooled by the cooler. The expander has a speed change mechanism for transmitting drive torque of a prime mover to the compressor and a common shaft that extends through the first and second rotors. The expander is interposed between the speed change mechanism and the compressor.

Abstract: A submersible centrifugal pump is claimed which includes an inner downthrust washer for receiving the downthrust load from the upward movement of the produced fluid, and an outer sealing washer, which is a non-load bearing washer, for allowing the repositioning of the impeller to prevent gaps that create recirculation.

Abstract: A magnetically coupled pump comprising a housing partitioned into a pump chamber and a motor chamber by a partition wall. An impeller is mounted in the pump chamber. The stator of the motor is mounted in the motor chamber. The rotating shaft of the impeller is received in a recess formed in the partition wall. The rotating shaft is held by a bearing mounted in the recess. An annular permanent magnet is mounted to the side of the body of the impeller which faces the partition wall and arranged about the rotating shaft. An annular sliding contact portion is formed at an end of the bearing and makes a sliding contact with the side of the body of the impeller facing the partition wall. A pair of annular auxiliary sliding contact portions are formed in a part of the rotating shaft and in a part of the bearing, respectively. The auxiliary sliding contact portions start to make a sliding contact with each other when the annular sliding contact portion is worn by a given amount.

Abstract: A compressor having a rotating member, which includes a drive shaft and a swash plate. A piston compresses gas and torsionally vibrates the rotating member. A damper is coupled to the shaft to reduce torsional vibrations of the rotating member. The natural frequency of the damper is substantially equal to that of the rotating member. The damper includes a metal pin coupled to the shaft, a weight coupled to the rotating member, and a rubberlike body arranged between the shaft and the weight. The pin functions as a spring acting in the direction of the torsional vibrations and has a spring constant that remains substantially the same within the operating temperature range of the compressor. The weight is vibrated torsionally with the rotating member by the pin to offset the torsional vibrations of the rotating member. The natural frequency of the damper is determined mainly by the mass of the weight and the spring constant of the pin.

Abstract: The invention provides a submersible pumping system which includes a motor containing self-centering rotor bearing assemblies. Each rotor bearing assembly in accordance with the present invention includes a sleeve, a journal, and at least two seals. The journal is preferably disposed about the sleeve which is keyed to the power transmission shaft of the motor. The journal has a peripheral surface which is configured to have at least two circumferential support regions which are spaced apart from one another. Each of these circumferential support regions supports a corresponding seal. Each seal includes an interface member and an activating member. When in place in a rotor section of a submersible pump motor, the seals frictionally engage the inner surface of the stator and exert a centering force against the journal and thus against the bearing sleeve and the power transmission shaft.

Abstract: A centrifugal fluid pump assembly includes a housing having fluid inlet and outlet ports and an impeller having magnetic pieces disposed therein and accommodated for rotation in the housing for feeding the fluid, typically blood by a centrifugal force developed during rotation. A rotational torque generating mechanism including a rotor having magnets for attracting the magnetic pieces in the impeller and a motor for rotating the rotor serves to impart a rotational torque to the impeller in a non-contact relationship for thereby rotating the impeller. The impeller has vanes which define radially outwardly extending fluid passages therebetween. The magnetic pieces are embedded in the vanes.

Abstract: An electric motor turbine-type fuel pump has an impeller driven to rotate by the motor and received between opposed faces of a first body and a second body defining a pumping channel about the periphery of the impeller, each face has a plurality of circumferentially spaced and separate cavities disposed radially inwardly of the pumping channel and constructed to contain pressurized fuel adjacent the impeller to balance the axial forces across the impeller and center the impeller between the first body and second body. If desired, to ensure communication between a cavity and the pumping channel, a shallow groove or flow passage can be provided extending between the cavity and the pumping channel. The cavities in both the first body and second body are complementarily sized and arranged to provide a surface area adjacent the impeller and a pressure therein sufficient to balance the forces acting on each side of the impeller.

Abstract: An integrated bearing system with journal and thrust bearings is incorporated in a single unit centrally pinned to the bearing housing and having integral thrust surface and journal surface lubrication grooves in combination with turbine and compressor wheel thrust surfaces. The bearing employs a first aperture substantially equidistant from the ends to engage the locating pin to prevent rotation of the bearing within the bearing case bore, while allowing the bearing to be free to symmetrically wobble within the bearing case bore.

Abstract: A submerged motor pump (4) has an auxiliary bearing assembly (19, 20) for supporting a rotatable main shaft (9) when the submerged motor pump is not in an operating condition or operates in a transient condition. The submerged motor pump includes a pump casing (6), at least one impeller (12), a motor (10,11), and a thrust balancing mechanism (15) for balancing thrust forces. The submerged motor pump further includes hydrostatic bearings (16, 17, 18) for supporting the main shaft at axially spaced locations by a pressurized fluid pumped by the submerged motor pump. The auxiliary bearing assembly has tapered support surfaces (FL, FU) for supporting the main shaft at the axially spaced locations.

Abstract: A pressure exchanger for transfer of pressure energy from one fluid flow to another with direct mounting of a rotor in a housing. The rotor has a central supply manifold for lubricating fluid and step-shaped bearing surfaces with reduced gap clearance towards each rotor end. The lubricating medium flows towards a manifold at each end and from there to the low pressure side via the axial gap clearance. During axial movement of the rotor the manifold pressure increases when the gap clearance decreases at one end while the opposite occurs at the other end, resulting in an axially centering force in the gap surfaces. In the same way steps in the radial bearing surfaces generate a centering force, since a radial movement will cause an increased pressure gradient when there is a reduction of the gap clearance and a decreased pressure gradient when there is an increase in the gap clearance. The end pieces also have a curved countersink at each low pressure port which increases the drainage from the manifold.

Abstract: The magnetic-drive assembly has an axial bearing which is strategically located to minimize compressive forces on a primary shaft. The axial bearing functions both as an ordinary thrust bearing and an inefficient impeller for circulating fluid internally within the magnetic-drive assembly. The axial bearing circulates lubricating fluid to a radial bearing to promote bearing longevity. The magnetic-drive assembly has a shaft adjustment mechanism for adjusting the axial orientation of a primary shaft and impellers with respect to a housing. The shaft adjustment mechanism retains its fixed axial orientation despite exposure to vibration and shock produced by the pump.

Abstract: A thrust bearing assembly for a surface mounted centrifugal pump utilizes the pump liquid for lubrication of a thrust bearing and radial bearings. The thrust bearing mounts to the rearward end of the intake chamber. A communication passage extends between the thrust chamber and the intake chamber. A circulation tube leads from the intake chamber to the rearward end of the thrust chamber. A portion of the water being delivered to the intake chamber is diverted through the circulation tube, where it circulates through the thrust bearing and back to the intake of the pump. The shaft passes through the thrust chamber to an electrical motor. A mechanical seal seals the shaft at the rearward end of the thrust chamber.

Abstract: A magnetically coupled pump comprising a housing whose interior is partitioned into a pump chamber and a motor chamber by a partition wall. An impeller is mounted in the pump chamber. The stator of the motor is mounted in the motor chamber. The rotating shaft of the impeller is received in a recess formed in the partition wall. The rotating shaft is held by a bearing mounted in the recess. An annular permanent magnet is mounted to the side of the body of the impeller which faces the partition wall and arranged about the rotating shaft. An annular sliding contact portion is formed at an end of the bearing and makes a sliding contact with the side of the body of the impeller facing the partition wall. A pair of annular auxiliary sliding contact portions are formed in a part of the rotating shaft and in a part of the bearing, respectively. The auxiliary sliding contact portions start to make a sliding contact with each other when the annular sliding contact portion is worn by a given amount.

Abstract: A pump having an improved fluid passage has an inner casing which houses at least one impeller and an outer casing which houses the inner casing. The pump also has a communicating pipe disposed outside of the outer casing for guiding a main flow of a fluid being handled from a space defined in the outer casing into another space defined in the outer casing.

Abstract: A thrust load compensating system for a compliant foil hydrodynamic fluid film thrust bearing is disclosed. The system includes an end cap over the free end of a rotary machine shaft, a compliant foil hydrodynamic fluid film journal bearing located at the free end of the shaft, and a source of air whose pressure varies with the square of turbomachine speed. The compliant foil hydrodynamic fluid film journal bearing located at the free end of the shaft serves as a non-contacting rotary shaft seal and, together with the end cap and free end of the shaft forms a thrust piston chamber. The thrust load compensating system of the present invention can be utilized in high speed rotary machines that have a compressor wheel and a turbine wheel that generate large axial aerodynamic forces that increase with speed.

Abstract: A thrust bearing assembly for a surface mounted centrifugal pump utilizes the pump liquid for lubrication of a thrust bearing and radial bearings. The thrust bearing mounts to the rearward end of the intake chamber. A communication passage extends between the thrust chamber and the intake chamber. A circulation tube leads from the intake chamber to the rearward end of the thrust chamber. A portion of the water being delivered to the intake chamber is diverted through the circulation tube, where it circulates through the thrust bearing and back to the intake of the pump. The shaft passes through the thrust chamber to an electrical motor. A mechanical seal seals the shaft at the rearward end of the thrust chamber.

Abstract: A centrifugal well pump has modules of pumping stages, each module having a separate thrust bearing. The thrust bearing for each module is supported by an uppermost diffuser of the module. A thrust runner rotates with the shaft and engages the stationary thrust bearing. A tension member engages the runner and extends downward through the stages. The tension member has a number of upward facing load shoulders, one for each impeller within the module. Each of the load shoulders supports the hub of one of the impellers. Downthrust on each impeller transfers through the load shoulder to the tension member, and from there to the thrust runner.

Abstract: A compressor includes a housing body and a drive shaft rotatably supported in the housing body. A drive plate is mounted on the drive shaft. Cylinder bores are defined in the housing body. Pistons are operably coupled to the drive plate and are disposed in the cylinder bores. The drive plate converts rotation of the drive shaft to reciprocating movement of the pistons in the cylinder bores. Each piston compresses gas supplied from a suction chamber to the associated cylinder bore and discharges the compressed gas to a discharge chamber. Force to minimize displacement of the drive shaft in the axial direction thereof adjusts in accordance with at least one of pressure in the discharge chamber and a rotation speed of the drive shaft.

Abstract: A method and apparatus is disclosed which reduces or removes axial loads on the drive string of a rotary downhole pump, i.e. tensile loads due to the hydrostatic load of the pumped liquid on the pump rotor, and/or at least part of the weight of the drive string, or thrust loads caused during pressurized fluid injection operations by backpressure of injected fluid on the pump rotor. This substantially prevents drive string/production tubing friction, wear and/or buckle in downhole rotary pumping arrangements operated in straight or curved well bores. When used in connection with fluid production pumping arrangements, the apparatus reduces the friction between the drive string and the production tubing of a downhole rotary pump for the pumping of well fluids which pump has a pump rotor connected to the drive string and is operated in a well bore. When used in connection with fluid injection pumping arrangements, the apparatus prevents drive string buckle, especially in curved well bore situations.

Abstract: A pressure compensation system for a rotary pump prevents axial displacement of the pump shaft. The pump includes a shaft rotatable about a major axis extending centrally of the shaft, at least one impeller attached to the shaft, and a pump housing for enclosing the shaft and at least one pump impeller for generating fluid pressure for pumping upon rotation of the shaft and the at least one impeller. In these pumps, the fluid pressure can exert an axial thrust along the major axis of the shaft. Therefore, such pumps include means for thrust compensation during rotation of the shaft. The improvement in the means for thrust compensation includes a first set of permanent magnets arrayed around and attached to the shaft and a second set of permanent magnets arrayed on the pump housing. The second set of permanent magnets magnetically attracts the first set of permanent magnets to hold the shaft and the at least one impeller at a fixed position along the major axis of the shaft with respect to the pump housing.

Abstract: A multistage canned motor pump comprising a pump section including a plurality of pump chambers and a motor section behind the pump section, both the sections having in common a single rotation shaft, and further a balance disk between the pump and motor sections, wherein an external circulation system is provided so that a part of a treating liquid discharged from a last stage pump chamber is circulated from a front rotor chamber through a pressure chamber accommodating the balance disk to a rear rotor chamber while the remaining part of the treating liquid is supplied to a rear bearing section for lubrication of the bearing section and further circulated through an external pipe to a pump section port for cooling of the motor section, and wherein an annular balance sheet is provided a verge at a high pressure side of the balance disk in the pressure chamber to control a flow rate of the treating liquid to thereby reduce a pressure of a circulation flow of the treating liquid toward the motor section.

Abstract: A thrust control system for use with a turbocompressor having gas bearings in which the average static pressure in the compressor housing differs substantially from the average static pressure in the expander housing which, during operation of the turbocompressor, will reduce the net resulting thrust to nearly zero without compromising the performance of the turbocompressor. In one embodiment of the invention, the thrust control system includes a pair of gas-dynamic thrust bearings and one compensation chamber with prescribed area and pressure ratios such that under static conditions the equilibrium position of the rotating assembly portion of the turbocompressor is in the center of the axial clearance range and under dynamic conditions the maximum displacement from center does not exceed the existing clearance.

Abstract: A piston-reciprocating type compressor has a disk mounted on a rotary drive shaft and operably coupled to a piston. The piston compresses refrigerant gas in a cylinder bore with a compressive force according a cooling load. A retaining chamber formed in the vicinity of an end of the drive shaft. A partition is housed in the retaining chamber. Two recesses are formed with the opposite sides of the partition in the moveable manner. The compressed gas is supplied to the recesses under pressure in proportion to the cooling load. A thrust bearing which connects with the partition supports an end of the drive shaft. The drive that is biased in the direction counter to a thrust load acting on the drive shaft.

Abstract: Highly-miniaturized rotary artificial hearts small enough to be implanted within the natural heart are provided. The entire radial load of a high-speed pump rotor and most of the axial load is carried by a radially stable arrangement of high-energy-product permanent magnets. The rotor is fully suspended and rotated magnetically, with the exception of a single thrust-bearing contact point which utilizes ultra-hard, wear-resistant material, preferentially diamond, located at the axis of rotation in a high-flow region of the pump. No sensors or electromagnets are required for the bearings. One preferred embodiment utilizes dual mirror-image axial or mixed flow impellers mounted on a single axis so as to pump from a central inflow port out both ends of the device.

Abstract: A positive displacement pump and thrust bearing assembly having a housing defining an internal fluid chamber having front and rear inner walls. A rotor having a front face and a rear face is positioned in the fluid chamber. Each of the faces of the rotor is spaced apart from a corresponding inner wall of the fluid chamber to define predetermined clearances therebetween. A shaft is connected at a first end to the rotor to effect rotation thereof. A sealed container surrounds and encloses a second end of the shaft and is in fluid communication with the fluid chamber. The thrust bearing assembly is positioned within the container and includes an adjusting sleeve and an adjusting plate. The adjusting sleeve is attachable to the housing and includes a central bore through which the shaft extends. The adjusting plate is connectable to the shaft such that the sleeve is located between the housing and the adjusting plate.

Abstract: An improvement in a fuel pump for an internal combustion engine in which the fuel pump comprises an electric motor over which fuel is pumped to cool the motor, and a pump mechanism, constituted as a side-channel pump driven by the electric motor, pumps the fuel. The pump mechanism has a pump impeller provided with two opposite radial surfaces each provided with an annular ring of blades respectively cooperating with side channels provided in a pump wall to constitute first and second pump stages. A connecting channel connects an inlet region of the side channel of the second pump stage with a discharge region of the side channel of the first pump stage in an arrangement to substantially eliminate torsional moments acting on the impeller during a fuel pumping operation. A first flat region is formed on the radial surface of the pump impeller in the first pump stage and a second flat region is formed on the radial surface of the pump impeller in the second pump stage.

Abstract: A multistage centrifugal pump for increasing the pressure of a product fluid passing through it. The pump includes a casing, an impeller shaft mounted for rotation within the casing and a plurality of impellers mounted back-to-back on the impeller shaft. A canned magnetic radial bearing is mounted around the outboard end of the impeller shaft and a magnetic thrust bearing and a magnetic radial bearing are mounted around the drive end of the impeller shaft. The pump is free of any product fluid return line connecting the product fluid chambers at the drive and outboard ends of the shaft.

Abstract: A thrust control system for fluid handling rotary machines, such as turbo expanders equipped with a magnetic thrust bearing, includes a magnetic thrust control circuit for providing a thrust signal which is a measure of the magnitude and direction of the thrust force on the thrust bearing. The rotor and stator of the machine have generally axially opposed thrust areas separated by a thrust cavity. Valves are connected between the thrust cavity and high and low pressure fluid sources. A controller, responsive to the thrust signal, controls the valves to selectively conduct fluid between the cavity and the high and low pressure sources to increase or decrease the fluid pressure in the cavity to minimize variations of the thrust force from a preset value which could be zero, for example.

Abstract: A pump integral with an electric motor has an integral rotor and impeller assembly that rotates within a stator casing and is supported on hydrostatic radial and thrust bearings. The pump avoids having to provide external seals or friction type bearings. The unit has a stator with windings therein contained within a pump casing which has an axial liquid entry and a liquid outlet. An integral rotor and impeller assembly is mounted for rotation on a fixed axial shaft within the stator. The integral rotor and impeller assembly is positioned axially relative to the stator casing by hydrostatic thrust bearings where the pressure for the thrust bearing fluid is generated by radial ducts located within the integral rotor and impeller assembly.

Abstract: In a magnetically driven pump so designed that a drive power of an electric motor is transmitted from a magnets-embedded drive rotor to a magnets-embedded follower rotor opposed to one another by way of a magnetic coupling, the follower rotor and an impeller are secured respectively to the opposite ends of a rotating shaft to which a thrust bearing of ceramic material is fastened for receiving an axial load, wherein a cushioning member is mounted on the rotating shaft so as to push the thrust bearing from the rear, in the position between the thrust bearing and a flange provided on the rotating shaft for determining the position of the follower rotor.

Abstract: The Oldam-ring of the rotational force transmitting mechanism of a fluid compressor is engaged with the rectangular section formed on the base portion of the main shaft of the rotary rod in the direction perpendicular to the axial direction of the main shaft to achieve an easy assembling of the Oldam-ring to the rectangular section. If the fluid compressor employs a thrust force canceling system wherein the thrust force acting on the rotary rod from the discharge side toward the suction side of a cylinder is canceled by a counter thrust force, the diameter of the main shaft located at the suction side is increased compared with that of the conventional fluid compressor to increase the counter thrust force acting on the edge surface of the main shaft whereby the thrust force can be effectively canceled.

Abstract: A submersible motor housing comprising: a base plate securely disposed between a motor device and a gear casing; a lower housing member disposed about the motor device and affixed to the base plate; a first gasket means disposed between the base plate and the lower housing member to ensure a water-tight seal therebetween; an upper housing member disposed about the top portion of the motor device and removably affixed to the lower housing member; and a second gasket means disposed between the lower housing member and the upper housing member to ensure a water-tight seal therebetween.

Abstract: The invention is directed to an energy recovery pump turbine for use in industrial processes where a fluid is pumped at a high pressure to the process and at least a portion of the fluid is discharged from the process at a high pressure. A turbine is positioned to receive the high pressure discharge from the process. The turbine has an impeller positioned on a shaft and the discharged fluid engages the impeller and causes the impeller and shaft to rotate. A pump is position adjacent to the turbine to receive the fluid being pumped to the process. The pump has an impeller mounted on a shaft and the shaft of the pump is operatively connected to the shaft of the turbine. Rotation of the turbine shaft causes the impeller and the shaft of the pump to rotate whereby the pump assists in supplying the fluid under pressure to the process and to recover energy from the high pressure fluid discharged from the process.