Abstract: An improved supercharging apparatus combines the elements of a rotary electric machine and an air compressor, such as in a turbocharger. A plurality of permanent magnets are encapsulated by a multi-layer carbon filament winding wound around the plurality of permanent magnets for retention of the plurality of magnets as the rotor of an electric motor for driving a charge air compressor for an internal combustion engine. The plurality of permanent magnets are preferably located on an inner core and on a magnet mounting surface formed on the rear face of the compressor wheel of the charge air compressor and spaced intermediately of the shaft portion and periphery of the compressor wheel before encapsulation by winding a carbon filament in a multi-layer coil over the plurality of magnets and the magnet mounting surface of the compressor wheel.

Abstract: A thrust bearing arrangement for a turbocharger including a thrust bearing unit having separate normal and reverse thrust bearings, and a thrust member provided on a turbine shaft and interposed between the normal and reverse thrust bearings. Both the normal and reverse thrust bearings are spaced from the turbine shaft in a radial direction of the turbine shaft and a lubrication oil is supplied to a first contact area between the normal thrust bearing and the thrust member. An oil guide portion is formed on a bearing housing for further supplying the lubrication oil to a second contact area between the thrust member and the reverse thrust bearing. A seal member is provided on the turbine shaft in slidable contact with an inner peripheral face of the normal thrust bearing.

Abstract: A hydraulic turbine mounted in-line between a gas production facility and the inlet of the sales lines for boosting pressure sufficiently to insert natural gas from the production facility into the sales line when the sale line pressure is at a high level. The turbine includes a compact turbine pump having several stages of compression with each compression stage including a 15-horse power motor that drives a hydraulic pump. A variable speed control is attached to the motor to allow the user to control the speed of the pump. Each pump stage has its own hydraulic motor that drives a turbine blade inside an enclosure. Pressure at each stage is controlled by means of an adjustable vane that has a stationary plate with a succession of fixed openings. The stationary plate is in face to face contact with a moving plate of similar design. The moving plate rotates at the center and may be adjusted by means of an elongated bolt assembly which adjusts the moving plate clockwise or counterclockwise.

Abstract: A device for producing a flow of fluid such as water or air in a whirlpool tub, having a rotatable impeller, which aspirates water from the space of the tub via intake openings, and ejects a jet of water or a jet of water and air into the space of the tub via outlet openings. The device further has a drive means for driving the impeller via a drive shaft. The driving means is arranged on the driving axle of the impeller but behind the impeller as viewed within the tub. In addition, the device further comprises a driving means such as a hydromotor, a pneumatic drive or a mechanical drive, that are driven by at least one central power drive, and can be serviced and repaired from within the whirlpool tub.

Abstract: A low speed high pressure ration turbocharger incorporates a compressor impeller having impeller blades for a first stage of compression mounted on a first side of the wheel and impeller blades for a second stage of compression mounted on a second side of the wheel. Driving the dual sided compressor impeller on a common shaft from the turbine wheel allows reduction in rotational speeds while increasing compression ratio of the turbine. The scroll inlet and outlet volute for the second stage inducer are integrated with the compressor housing or other portions of the turbocharger case for compact packaging.

Abstract: A radial-flow exhaust-gas turbocharger turbine is provided with a row of adjustable guide blades which are rotatable via adjusting shafts mounted in a casing. The guide blades are each provided with sealing discs on their longitudinal sides running at right angles to the adjusting-shaft axes. The diameter of the sealing discs is a multiple of the thickness of the guide blades. The sealing discs which are located on the side remote from the adjusting shafts form bearing points for the guide blades in the casing.

Abstract: A particularly efficient and reliable motor-assisted turbocharger for internal combustion engines includes an assisting electric motor, a combination flow turbine wheel which may be inserted and removed from the turbocharger assembly through the exhaust opening of the turbine casing, and a divided volute turbine casing designed in a unique way so that the tips of the turbine blades can be extended to be closely adjacent to the turbine casing divider wall without complicating the mechanical design of the turbine, thereby providing an economical assembly with high-turbine efficiency compared with conventional, radial turbines used in turbochargers, and by providing in preferred embodiments, improved bearing support for the shaft, including reliable, stable shock- and vibration-resistant, high efficient, simple and economical bearing systems that are insertable and, permit inexpensive manufacture, maintenance, and repair of the turbochargers in which they are used.

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 turbocharger includes a main housing (1) for housing a turbine rotor (2) and a compressor impeller (4). An independent bearing box (23) is provided in the main housing (1). The main housing (1) is comprised of a turbine housing (3) and a compressor housing (5). A rotating shaft (7) connecting the turbine rotor (2) with the compressor impeller (4) is supported by a semi-float metal bearing (24) placed in the bearing box (23). An oil passage (26) is formed in the main housing (1) for feeding an oil to inside and outside of the semi-float metal bearing (24) in the bearing box (23). Oil grooves (37) are formed in end faces of the metal bearing (24) and another grooves (34) are formed at end faces of the bearing box (23) for discharging the oil from the semi-float metal bearing (24). Oil flow in the turbocharger housing (1) is controlled by the oil grooves (34, 37).

Abstract: The present pump design with the elimination of a separate hydraulic fluid path from the cylinder dramatically improves the efficiency and pressure achieved by the pump by 15% as a result of reducing the number of chambers provided in the pump interior. It is, however, imperative for reasons not completely understood that in order for these efficiencies to be obtained that a reservoir of oil be located adjacent the main oil intake volume to ensure quick filling of the main oil intake volume as the piston cycles to its pressure stroke. This prevents cavitation of the pump.

Abstract: A turbocharger includes a main shaft carrying a turbine wheel and an impeller. The shaft is supported in a housing by means of a floating bearing and a ball bearing which is particularly effective in resisting axial loads tending to move the shaft toward the impeller. A preload spring positioned between the stationary race of the ball bearing and a thrust plate fixed to the housing provides a force urging said ball bearing against a shoulder on the main shaft against thrust forces tending to move the shaft toward the turbine wheel.

Abstract: A pressure balanced turbocharger rotating seal is provided by two piston rings mounted on the shaft of the turbocharger, one of the rings engaging a circumferential surface of the shaft bore in the center housing and the second ring engaging a circumferential surface of the shaft bore in the turbine wheel shroud, with a passage for introducing pressurizing gas intermediate the two rings, the passage including a circumferential channel in the inner face of the turbine wheel shroud, and a compression seal engaged between the center housing and turbine wheel shroud outboard of the channel.

Abstract: An improved machine includes a combination of elements of a rotary electric machine and an air compressor, such as in a turbocharger, and provides an improved turbocharging device for enhancing turbocharged internal combustion engine performance. The improved turbocharger includes a plurality of magnets which are mounted in a generally circumferential arrangement about the back face of the compressor wheel. A stator winding is mounted in opposing relation to the motor magnets. Torque can be applied to the magnets and hence to the compressor wheel when the stator is energized by an appropriate energizing circuit, thereby improving engine performance especially at low engine speeds.

Abstract: In a unique turbocharger shaft bearing system, a thrust bearing is provided inboard of the compressor end shaft bearing. Removable parts of the turbocharger housing permit assembly of a first thrust bearing part with an outwardly extending flange forming at least one thrust bearing interface to be fastened to the rotating shaft for rotation therewith and a separate stationary thrust bearing part to be carried by the housing, providing thrust bearing interface for the thrust bearing interface of the rotating first thrust bearing part inboard of the compressor end of shaft bearing. The removable parts can include a separate supporting member for the compressor end shaft bearing. The remainder of the turbocharger housing supports the second shaft bearing adjacent its turbine end and, through the separate bearing supporting member, the first shaft bearing.

Abstract: A system to hydrostatically augment the thrust load capacity of a bilateral compliant foil hydrodynamic fluid film thrust bearing for a turbomachine is disclosed. A plurality of channels and fixed orifices are provided in the bearing thrust plate to deliver and regulate compressor bleed air flow to the compressor side of the bilateral compliant foil hydrodynamic fluid film thrust bearing which includes additional channels and orifices to direct the bleed air against the bearing rotor thrust disk. After impinging on the rotor thrust disk, the bleed air flow exits the thrust bearing through a plurality of variable orifices comprised of the hydrodynamic thrust bearing elements which are controlled in their flow conductance by the axial position of the rotor thrust disk. The bleed air may then pass through the adjacent journal bearing which functions as a fixed orifice.

Abstract: A turbocharged diesel engine is described. The engine has a two stage turbocharger assembly including low pressure turbochargers coupled and parallel and arranged in series with a single high pressure turbocharger. This allows all turbochargers to be of comparable dimensions for interchangeability of parts. The turbochargers may be mounted on an enclosure which encloses the turbines and the exhaust gas duct work which communicates with the exhaust pipe to insure that any leaking exhaust gas escapes to the atmosphere via the exhaust pipe. A cartridge is also described which contains the moving parts which can be removed without disturbing the turbine housing.

Abstract: An internal combustion engine cooling system incorporating a motor-assisted turbofan is disclosed. The turbine-driven fan is increased in rotational speed by energizing a motor attached to the turbine fan shaft from an outside power source to provide required cooling air flow. The cooling air system of the invention also includes a ducted fan for supplying cooling air for one or more heat exchangers, and is controlled via inputs from an engine speed sensor for providing a motor operating signal, a flow sensor downstream of the heat exchangers for providing a motor operating signal, and temperature sensors located throughout the cooling circuits.

Abstract: A turbocharger compressor impeller structured as a combination elevated auxiliary blades fan surrounded by a curved inducer which provides a high gas volume low speed turbocharger compressor to deliver pressured gas into a combustion engine.

Abstract: A method and device for the autolubrication of the rolling bearings of turbomachines. The method and device utilize pressure differences present in the turbomachine for sucking in the lubricating oil. Moreover, a pressure is built up in centrifuges arranged on a shaft, and is used for the direct injection of the lubricating oil into the rolling bearings. For this purpose, an annular element imparting a negative pressure is arranged stationarily on the shaft, and is designed as a negative pressure chamber. The negative pressure chamber is connected via an oil suction conduit to an oil sump holding the lubricating oil and via a first air conduit to a negative pressure region of the turbomachine. The oil sump is connected via a second air conduit to an overpressure region of the turbomachine. A separating point is arranged between the oil suction conduit and the negative pressure region, preferably in the first air conduit.

Abstract: An exhaust gas-driven turbine drives a compressor to charge an internal combustion engine. An integral motor is positioned on the connecting shaft to add power to the turbocharging shaft, especially at low exhaust gas volume. Cooling for this motor includes circulation of engine oil therearound and may include insulation to limit heat inflow from the turbine and may include air flow through the motor to carry away heat inflow from the turbine.

Abstract: A turbocharged diesel engine is described. The engine has a two stage turbocharger assembly including two low pressure turbochargers coupled in parallel and arranged in series with a single high pressure turbocharger. This allows all turbochargers to be of comparable dimensions for inter-changeability of parts. The turbochargers may be mounted on an enclosure which encloses the turbines and the exhaust gas duckwork which communicates with the exhaust pipe to insure that any leaking exhaust gas escapes to the atmosphere via the exhaust pipe. A cartridge is also described which contains the moving parts and which can be removed without disturbing the turbine housing.

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: In a turbo, pump according to the present invention, blades 3e and a shroud 3f are continuously formed with a boss 3c of a turbine wheel 3, a meridian plane configuration of the shroud 3f is formed as an concave arcing rotatable surface. A boss shroud 3f.sub.1 is formed substantially parallel to the axis of rotation O. A portion 3e.sub.2 of a blade outlet edge 3e.sub.1 is smoothly continuous to the boss shroud 3f.sub.1 and largely projects downstream. A portion 3e.sub.3 of the blade outlet edge 3e.sub.1 is formed substantially perpendicular to the axis of rotation O. The blade outlet edge 3e.sub.1 is formed with a smooth arc-like curve projecting convexly downstream between the portion 3e.sub.3 and the portion 3e.sub.2. An angle of the blade outlet edge 3e.sub.1 is set to an angle of substantially 0.degree. at the portion 3e.sub.2 of the blade outlet edge 3e.sub.1 and to substantially the conventional degree of angle at the portion 3e.sub.3 of the blade outlet edge 3e.sub.1.

Abstract: A support housing for the fastening of the exhaust gas turbochargers of an internal-combustion engine is provided. The support housing encloses a hollow space which is used for receiving the turbines of the exhaust gas turbochargers while the compressors are situated outside the hollow space. In order to simplify the manufacturing and assembly and to reduce the costs, bearing housings of the exhaust gas turbochargers are integrated in the support housing. The manufacturing and the assembly may also be simplified and rendered less expensive by the fact that the support housing is divided into two symmetrical housing parts along a plane extending through the perpendicular axis in the center of the support housing. In this case, the two housing parts are preferably constructed to be centrically symmetrical with respect to the central perpendicular axis.

Abstract: A journal bearing for use with a turbocharger includes a free floating bushing rotatable between a shaft and housing. In one embodiment, a single oil feed passage is provided at an angle in the housing, and a number of radially disposed oil transfer passages are provided in the free floating bushing. The angle of the housing passage relative the bushing passages is such that oil flowing between the passages imparts an angular momentum to the bushing opposite the shaft rotation to slow the rotational velocity of the bushing. Alternately, the housing passage may be radially disposed and the bushing passages may be inclined at an angle relative to the housing passage to similarly impart an angular momentum to the floating bushing in a direction opposite the directing of rotation of the shaft, or both the housing passage and the bushing passages may be inclined relative one another to impart an angular momentum to the bushing in a direction opposite the direction of rotation of the shaft.

Abstract: An exhaust-gas turbocharger for an internal-combustion engine, the exhaust-gas turbine of which comprises a rotor with an at leash partially diagonal throughflow direction and a spiral guide channel surrounding this and having a mouth region in the form of an angular nozzle, and a variable guide blade cascade with guide blades being arranged in the mouth region. In order to design guide blade cascades with a simpler construction than that of known versions, at the same time with an increase in their operational reliability, according to the invention the guide blades are divided in such a way that they form a divided guide blade cascade with a stationary guide-blade cascade part and with a guide-blade cascade part assigned to this and rotatable concentrically relative to the axis of rotation of the rotor.

Abstract: A combination turbine and air compressor apparatus comprises a housing having first and second air inlet and first and second compressed air outlets, an operating gas inlet, and an operating gas outlet. Ends of a turbine-air compressor shaft are rotatably mounted in bearings mounted in the housing. A turbine wheel is fixed to central regions of the shaft intermediate the operating gas inlet and outlet. First and second symmetrical air compressors are fixed to the shaft on opposite sides of the turbine wheel with the compressors in air flow communication with corresponding ones of the air inlets and pressurized air outlets.

Abstract: A thrust bearing for a turbocharger includes a main body portion which defines a central bore for receipt of a thrust collar, an oil reservoir in the shape of a blind, oblong slot disposed in the main body portion and an oil passageway connecting the oil reservoir with the central bore. As oil is drained from the turbocharger by a siphoning action as the engine oil level drops, oil which is stored in the oil reservoir will remain and after the engine has completely stopped this stored oil is available to drain into the interface between the thrust collar and central bore of the thrust bearing in order to provide lubricating oil to this interface upon restart of the engine. Oil is also provided by the reservoir to the turbine and compressor journal bearings where it is held in small clearances on the inner and outer surfaces of the journal bearings.

Abstract: The invention is in an oil drain and turbo assembly support that includes a tubular body that is open longitudinally to pass a flow of oil draining from a turbocharger bearing assembly through an engine valley pan and back into the engine oiling system. The tubular body is bent to accommodate an offset of the bearing assembly housing oil drain to the hole through the engine valley pan and provides a top end coupling for rigid mounting across which bearing assembly housing oil drain. The opposite tubular body end is necked into a smooth cylindrical surface for telescoping into the valley pan hole and includes an O-ring seal fitted thereto for travel through the valley pan hole and is pulled upwardly into sealing engagement with the hole edge when the tubular body top end coupling is secured to the bearing assembly housing.

Abstract: An exhaust gas turbocharger having rotor runners disposed in roller bearings protects the roller bearings from shocks and vibrations by a pressure-oil-filled oil film damper. By a shut-off device arranged in the main lubricating oil duct, the lubricating oil supply of the roller bearings is shut off when the rotor runners are stopped. However, the pressure oil supply of the oil film damper remains operative so that the oil film damper retains its operability.

Abstract: An expander driven compressor assembly is disclosed comprising a scroll-type expander having at least one pair of meshed axially extending involute spiral wraps wherein one of the wraps orbits relative to the other wrap and a scroll-type compressor having at least one pair of relatively orbiting meshed axially extending involute spiral wraps. The orbital wrap of the expander is drivingly connected to the orbital wrap of the compressor through a common synchronizer and counterweight assembly. Auxiliary drive power developed by the expander and not required to drive the compressor is used to drive a power take-off shaft. In addition, expansion struts are proved to compensate for thermal expansion or contraction of the relatively orbiting scroll wraps. By this arrangement, a compact and efficient expander driven compressor assembly is achieved.

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 centrifugal supercharger is provided with a supporting system for supporting a shaft. The supporting system includes at least one outer bearing and at least one inner bearing. The outer bearing is fitted in the housing so as to form a small clearance between its outer circumferential surface and the housing. The inner bearing is fitted in the outer bearing so as to form a small clearance between its outer circumferential surface and the inner circumferential surface of the outer bearing. In the inner bearing, the shaft is inserted so as to form a small clearance between its outer circumferential surface and the inner circumferential surface of the inner bearing. At least one outer oil supply hole and at least one inner oil supply hole are formed in the outer and inner bearings, respectively and oil is supplied from the oil supply passage to each small clearance through the oil supply holes.

Abstract: A turbocharger bearing is disclosed containing a sleeve (26) which is floatingly disposed in a bore (18) of a bearing case (6) for radially mounting a shaft (14). To prevent rotation of the sleeve an element is disposed in the bearing case (6), which engages both a notch in the sleeve (26) and a recess (48) in the bearing case (6). This arrangement prevents high surface pressures between the element and the sleeve (26) and between the element and the bearing case (6). The element is constructed as a retaining ring (30) having a tongue (48) and at least one boss (54, 56). The tongue (48) engages the recess (46) in the bearing case. The boss (54, 56) is pointed toward the end face (74) of the sleeve (26) where its outside surface (70, 72) contacts at least one surface of the notch (76) formed in the end face (74) of the sleeve (26).

Abstract: A turbocharger includes a turbine housing with a variable geometry mechanism which controls the flow area of the throat through which motive exhaust gasses are communicated to the turbine wheel. The turbine housing is provided with an insert which defines one wall of the throat and which is cast in place as part of the turbine housing. The insert may be made of a relative expensive, high nickel content material to assure that a non-corrosive surface is provided adjacent to the vanes which are pivotally actuated to vary the area of the throat. The remainder of the housing is made of a standard ductile iron which is substantially less expensive than the more expensive corrosive resistant high nickel content material from which the insert is manufactured.

Abstract: A turbocharger includes a compressor wheel and shaft assembly in which a threaded connection is provided between the shaft and the compressor wheel. A pair of pilot surfaces on the shaft and on the compressor wheel are located on either end of the threaded sections of the shaft and compressor wheel, and are displaced radially from the threads. Accordingly, the piloting functions which assure concentricity between the shaft and compressor wheel are kept entirely separate from the attachment function provided by the threads, thereby permitting the concentricity between the compressor wheel and shaft to be held to tighter tolerances than would be possible if the threads also performed a piloting function.

Abstract: A relatively displacing apparatus including a movable member and a stationary member which has a coating layer disposed adjacent to the movable member, formed by flame spray coating and including at least one selected from the group consisting of hexagonal system boron nitride and ceric oxide. Since the coating layer is easily machined with the movable member, the coating layer comes to have a surface generated by machining with the movable member and the clearance between the movable member and the stationary member is made zero (0) substantially when the movable member and the stationary member displace relatively at a high temperature. Thus, the efficiency of the relatively displacing apparatus has improved. In addition, since the coating layer has a high thermal shock resistance, the durability of the relatively displacing apparatus has improved.

Abstract: An improved compressor wheel assembly for a a turbocharger or the like includes a centrifugal compressor wheel having a boreless hub to substantially improve wheel fatigue life. The compressor wheel is formed as by casting from an aluminum alloy to include an integral mounting sleeve extending coaxially from the boreless hub and adapted for connection as by threading with a turbocharger shaft. An annular spacer ring of wear resistant material is mounted on the wheel mounting sleeve and defines wear resistant surfaces for supporting one or more seal rings within the bore of a compressor backplate opening, and for axially engaging an adjacent thrust bearing unit associated with the turbocharger shaft.

Abstract: A turbocharger for an automotive vehicle includes a rotatable shaft having a cup-shaped section to which an axial projection of a turbine wheel is fitted under a shrinkage fit. The rotatable shaft is rotatably supported by ball bearings. A nut is screwed on the rotatable shaft in a manner to clamp the ball bearings together with a compressor wheel between the nut and the cup-shaped section. The inner race of the ball bearing on the turbine wheel side is in axially tight contact with an abutting surface formed in the rotatable shaft. In this arrangement, a setting is made to satisfy the following formula. l/P.gtoreq.0.002 where l is a distance (mm) in the rotatable shaft, between a bottom inner surface of the cup-shaped section and the abutting surface; and P is an axial tensile force developed by screwing up the nut in the direction of the cup-shaped section.

Abstract: A ceramic turbo charger rotor having a bearing structure in which an inner race of an angular ball bearing and a spacer are assembled to a journal shaft as one unit in such a manner that one end of the spacer is assembled to a turbine-side connecting portion of the journal shaft by a pressure inserting manner and the other end of the spacer is assembled to a compressor-side connecting portion of the journal shaft by a clearance fitting manner. Therefore, the deviation between a center axis and a rotational axis of the rotor caused by the pressure insertion of the spacer is released at the compressor side and the amount of the unbalance before correcting of the rotor is remarkably reduced.

Abstract: A turbocharger is provided with a tubular insert that carries engine coolant to an area adjacent the bearing supporting the end of the shaft upon which the turbine wheel is attached to provide cooling so that the temperature of the bearing does not increase to an unacceptable level.

Abstract: A turbocharger includes a rotating shaft which is supported within the turbocharger center housing by rotational bearing elements. The bearing cartridge is located axially within the housing 14 by a pin which extends through orifices drilled in the center housing and in the bearing outer ring. The pin is relatively smooth, so that excursions of the bearing cartridge assembly with the shaft is permitted when the shaft is accelerated through critical rotational speeds. These excursions are damped by lubricating fluid communicated into grooves circumscribing the bearing outer ring through lubrication passages extending through the pin. The lubricating fluid in the grooves communicates into the intersticial space defined between the outer ring of the bearing cartridge assembly and the center housing to thereby dampen the excursions of the bearing cartridge assembly.

Abstract: A rotary blood pump includes an impeller in a pump chamber driven by a fluid motor. In a first preferred embodiment, the fluid motor includes a rotary member having a series of cupped fluid reactive surfaces that receive a tangential inlet pressurized fluid flow. The cupped surfaces direct the fluid to opposite sides of the rotary member. Passages extending through the rotary member convey fluid from one side of the rotary member to the other. In a second preferred arrangement, the fluid motor is defined by a positive displacement motor. In a third embodiment, the fluid motor is separated from the pump chamber by a wall. Both biocompatible and non-biocompatible fluids can be used to drive the fluid motor.

Abstract: In a method of manufacturing a ceramic turbo charger rotor, wherein an inner race of an angular ball bearing and a spacer are integrally secured to a journal portion of a metal shaft for connecting a ceramic turbine rotor and a metal compressor rotor, the inner race and the spacer are inserted to the journal portion of the metal shaft under a condition such that a tensile load is applied to the metal shaft.

Abstract: A fan inlet and diffuser apparatus (30) is provided with a lobed mixer (60) for intermixing fan bypass air (25) with a flow of fan discharge air (27). The fan inlet and diffuser apparatus (30) is particularly adapted for use in a inducing a flow of cooling air (21) through an upstream heat exchanger (20) and thence directing a portion (23) of the cooling air passing from the heat exchanger to the inlet side of the fan (14) of an air cycle machine (10), while directing the remaining portion (25) to bypass the fan (14) and pass into the central outlet flow passage (52) flowing over the mixing ejector (60) which imparts a directional swirl to the bypass flow (25) and a counter swirl to the fan discharge flow (27) passing from the fan outlet through the interior of the mixer (60), thereby enhancing the mixing of these two flows within the passage (52).

Abstract: An inertial filter includes a pitot or probe extending into the main stream of a turbomachinery scroll, an open end portion of the probe being directed downstream. The probe also includes a cowling to orient or inertially swirl the airflow about the probe.

Abstract: In air cycle machines with hydrodynamic bearings, the mass flow rate of coolant (36) passing through a series of bearings (32, 28, 30) is metered before the coolant passes through the final bearing (30). The final bearing operates at an internal pressure equivalent to that present in the region (72) into which coolant exhausts after exiting the final bearing. Since coolant in the final bearing is at the same pressure as air immediately downstream from the bearing, no rotating seal is required at the outlet of the bearing cooling flowpath.

Abstract: A turbomachine having a unitary ceramic rotating assembly mounted within a split housing. The rotating assembly includes at least a turbine and integral shaft, the shaft providing a cooled bearing support surface for a fluid film foil bearing.

Abstract: A new turbine comprising a combination-flow turbine wheel and a divided volute turbine casing, including a dividing wall that is canted away from the exhaust opening and adapted to direct the gases from both volute passages to flow through the turbine substantially axially with less flow losses than prior turbines.

Abstract: The rotating components of an exhaust gas driven turbocharger are supported by a pair of axially separated ball bearings having an outer race and an inner race. A spacer between the bearings engages the outer race of both bearings and exerts a preload bias on the outer races of the bearings urging the outer races away from one another. Accordingly the bearings are preloaded so that centrifugal forces generated during high speed operation will not force the ball bearing away from the inner races.