Abstract: A turbo compressor is provided which includes a motor having a stator with a rotor which rotates in the inside of the stator. A rotation shaft is press-fitted into the rotor and is integrally rotated with the rotor. A bearing is provided for supporting the rotation shaft of the motor. At least one impeller is attached to the rotation shaft of the motor and rotated therewith. A foil bearing including a plurality of foils is provided. First ends of the foils are respectively fitted into a multitude of engaging grooves defined on a circumferential inner surface of the stator, and second ends of the foils make contact with a circumferential outer surface of the rotor.

Abstract: A molecular drag vacuum pump configured for pumping a gas stream from an inlet to an outlet, the pump including a high-speed spinning disk having a channel formed in its edge, disposed within a housing. A passageway is formed on the inside of the housing adjacent the disk, and gas comes in contact with surfaces of the spinning disk in successive stages, conformable wipers being disposed adjacent the spinning disk to direct the gas stream to the successive stages. The disk can be powered by an integral motor, comprising permanent magnets associated with the disk and cooperating coils associated with the housing.

Abstract: A two-stage, permanent-magnet, integral disk-motor centrifugal pump, has a housing having first and second suction ports and first and second discharge ports, the first discharge port being connected to the second suction port. A first impeller is rotatably disposed on a shaft between the first suction port and the first discharge port and a second impeller is placed back-to-back with the first impeller and rotatably disposed on a shaft between the second suction port and the second discharge port, each of the first and second impellers having a back shroud with an array of permanent magnets fixed thereto. A first stator and a second stator are interposed between and adjacent to the first and second impellers, respectively, the rotational speed of the impellers being controlled by invertors acting upon the stators. Provisions are also included for extracting motor heat from the pump.

Abstract: The invention is a two-phase compression device and a process which provides energy to fluids including an essentially liquid fluid and an essentially gaseous fluid or a fluid having a liquid phase and a gas phase, at least one of the fluids or phases being miscible in at least one other of the fluids or phases which allows mixing of the fluids or phases. A device in accordance with the invention includes at least one two-phase compression element having at least one inlet stage and at least one outlet stage, each one of the stages having an impeller and a diffuser, which mixes the essentially liquid fluid and the essentially gaseous fluid or the phases and which provides energy to each of the essentially liquid and gaseous fluids or phases with the mixture provided from the at least one two-phase compression element being a pressurized liquid or essentially a pressurized liquid.

Abstract: The invention is a two-phase compression device and a process which provides energy to fluids including an essentially liquid fluid and an essentially gaseous fluid or a fluid having a liquid phase and a gas phase, at least one of the fluids or phases being miscible in at least one other of the fluids or phases which allows mixing of the fluids or phases. A device in accordance with the invention includes at least one two-phase compression element having at least one inlet stage and at least one outlet stage, each one of the stages having an impeller and a diffuser, which mixes the essentially liquid fluid and the essentially gaseous fluid or the phases and which provides energy to each of the essentially liquid and gaseous fluids or phases with the mixture provided from the at least one two-phase compression element being a pressurized liquid or essentially a pressurized liquid.

Abstract: A motor pump group has a plurality of centrifugal pumps of the same nominal port diameter including a plurality of impellers having stepwise greater outside diameters for stepwise higher pump heads, and a plurality of respective motors for actuating the pumps. The pump heads are classified into a low head section and a high head section. The low head section is handled by a single-stage impeller, and the high head section is handled by multi-stage impellers. The centrifugal pumps have respective pressed-sheet pump casings. The outside diameters of the impellers are not required to be increased in the high head section, and the outside diameters of the pump casings fall in a relatively small range.

Abstract: A motor pump group has a plurality of centrifugal pumps of the same nominal port diameter including a plurality of impellers having stepwise greater outside diameters for stepwise higher pump heads, and a plurality of respective motors for actuating the pumps. The pump heads are classified into a low head section and a high head section. The low head section is handled by a single-stage impeller, and the high head section is handled by multi-stage impellers. The centrifugal pumps have respective pressed-sheet pump casings. The outside diameters of the impellers are not required to be increased in the high head section, and the outside diameters of the pump casings fall in a relatively small range.

Abstract: A vacuum pump includes a plurality of rotors accommodated in a housing, a plurality of bearings for supporting the shafts of the rotors, respectively, a fluid-suction opening and a fluid-discharge opening formed in the housing, and a motor for driving at least one of the rotors. The pump has a first pump structure section for suction and discharge of gas, the pressure of which is in a viscous flow region, by utilizing change in volume of a space formed by the rotors and the housing. A second pump structure section is provided for transporting gas, a pressure of which is in an intermediate flow region, and gas, the pressure of which is lower than a pressure of the intermediate flow region, by utilizing movement of the space from a suction side to a discharge side of the second pump structure section.

Abstract: An axial flow-type pump for separating immiscible fluids having different specific gravities and a discharge manifold fluid connected to the fluid pump for drawing of the fluid having the heavier specific gravity. The fluid pump employs a rotatable impeller mechanism having a hollow core and a decreasing axial pitch in the direction of fluid flow. The fluid interface between the pump and the discharge manifold is adjustable, so that the discharge of the fluid having the heavier specific gravity can be adjusted. The fluids are introduced into the inlet end of the rotatable impeller to produce a high velocity swirling action in the fluids and a low pressure area along the longitudinal axis of the flow line, to generate a high centrifugal force as the fluids move axially and cause the fluid having the heavier specific gravity to migrate to the perimeter. The discharge manifold is then used to draw off the fluid having a heavier specific gravity.

Abstract: The invention includes a compressor unit with a connected drive by a high-frequency motor for compressing gases and which is suitable for great ocean depths and for natural gas conveyance from the ocean floor where the low temperature obtaining in the water is effectively utilized. The compressor unit is supported by magnetic bearings in a housing. The compressor includes a plurality of compressor stages connected by pipe lines which form a surface cooler on the suction side arranged around the housing.

Abstract: A vacuum pump producing ultra high vacua has a housing containing a first set of rotor blades provided around a first rotor for producing ultra high vacua and a second set of rotor blades provided around a second rotor for producing low to high vacua wherein the first rotor and the second rotor are magnetically suspended during pump operation. The first rotor is disconnected from the second rotor during pump operation in a low to high vacuum range, and it is connected with the second rotor as the pump operation shifts from a high vacuum range to an ultra high vacuum range. Because of this feature, the pump operation ranging from a low vacuum range up to an ultra high vacuum range can be performed by a single pump.

Abstract: A two-stage vacuum pump apparatus has a first stage of vacuum pump constituted by a screw-type vacuum pump and a second stage vacuum pump constituted by an oil-sealed rotary vacuum pump operative to maintain the back pressure of the first stage vacuum pump at a level ranging from 1 to 100 Torr., whereby a high level of vacuum can be attained in a system to be evacuated without any risk of contamination of the evacuated system by oil. Also disclosed is a method of operating the two-stage vacuum pump apparatus.

Abstract: A pump is disclosed for pumping a volatile fluid having a given vapor pressure. The pump of this invention comprises a pump housing comprising an inlet for introducing the liquid at a relatively low static pressure level into the pump housing and an outlet for discharging the liquid from the pump housing at a relatively high static pressure level. A fluid path extends from the inlet to the outlet. A booster stage impeller is rotatively mounted for drawing the fluid through the inlet and for pumping the fluid along the fluid path with an increased kinetic pressure. A diffuser is affixedly disposed within the pump housing to intercept the fluid directed along the fluid path by the booster stage impeller for converting the kinetic pressure imparted to the fluid into increased static pressure.

Abstract: An aggregate for delivering fuel from a fuel supply tank to an internal combustion engine of a motor vehicle comprises an electric drive motor, on the output shaft of which an inner rotor, having teeth on the peripheral surface, is positioned, and a ring-shaped outer rotor surrounding the inner rotor and having inner teeth meshing with the teeth of the inner rotor to form a gear pump. Fuel-conveying vanes are provided on at least one rotor to form a regenerative-type pump. The regenerative-type pump is connected in series to the gear pump as seen in the direction of the fuel supply.

Abstract: A rotary compressor machine comprises at least one rotary compressor member, gearing for driving the member(s), a drive shaft for coupling to a drive motor, and an auxiliary shaft extending axially parallel to the rotary compressor axis and connected coaxially to the drive shaft, said auxiliary shaft having coupling means at its free end opposite the drive shaft for torque transmission. This enables good matching of each machine to operating conditions, even when two machines are coupled in series connection, in respect of efficiency, induction volume flow, and further parameters without incurring special assembly or manufacturing costs.

Abstract: A rotary vane evacuating pump having two series connected pumping stages is disclosed. Each pumping stage is provided as an exchangeable unit and has a housing which is detachably connected to one face of an interface flange. The housings of the pumping stages are contained in a chamber defined between the interface flange and an outer shell which is detachably mounted thereto. The chamber is filled with water surrounding and contacting the two housings. Each pumping stage is readily dismantled for the purpose of service or replacement.

Abstract: A compound turbocharger system for an engine/compressor unit is disclosed including a pair of conventional turbochargers including turbine components connected in series to convert exhaust gas energy from the engine cylinders into mechanical energy for driving a pair of impeller-type compressor components arranged to supply sufficient quantities of air to the intake manifold of the engine cylinders and to the intake manifold of the compressor cylinders. In one embodiment, the impeller-type compressor components are arranged in parallel. In a second embodiment, the impeller-type compressor components are arranged in series with the air supplied to the intake manifold of the engine cylinders being provided by the first compressor component.

Abstract: A compound turbocharger system (2, 2', 112) for an engine/compressor unit (4, 4') is disclosed including a pair of conventional turbochargers (14, 16, 111, 113) including turbine components (18, 22, 114, 116) connected in series to convert exhaust gas energy from the engine cylinders (6, 104, 106, 108, and 110) into mechanical energy for driving a pair of impeller-type compressor components (26, 28, 118 and 120) arranged to supply sufficient quantities of air to the intake manifold (42, 122) of the engine cylinders (6, 104, 106, 108, 110) and to the intake manifold (40, 124) of the compressor cylinders (8, 100, 102). In one embodiment, the impeller-type compressor components (26, 28) are arranged in parallel. In a second embodiment, the impeller-type compressor components (118, 120) are arranged in series with the air supplied to the intake manifold (122) of the engine cylinders (104, 106, 108, 110) being provided by the first compressor component (118).

Abstract: An improved power fluid driven turbo pump is provided for pumping oil wells of the type having, from time-to-time, significant quantities of gas included in the oil so that wide variations in the density of the medium to be pumped may be expected to be encountered. Two separate pumping units driven by the same power fluid are employed, one of which is designed to efficiently compress and pump gas, and the other is designed to efficiently pump normal density fluids. Since the pumps are disposed in series, the combined efficiency of the pumps is substantially unchanged due to changes in density of the fluid to be pumped and remains at a uniformly high level.

Abstract: A pump set comprising a compressor followed by a liquid ring vacuum pump with the two pumps matched to each other so that a relatively small liquid ring vacuum pump can draw and maintain vacuum under 40 Torr.

Abstract: A vacuum cleaning apparatus is disclosed having a suction head adapted for use on a collection tank. The suction head includes a base, at least one blower-motor unit mounted on the base and having a suction intake and an exhaust outlet. The exhaust outlet of the unit is connected to a baffled sound chamber within which a plurality of sound absorbing elements are positioned. Another blower-motor unit may be mounted on the base with the units interconnected in series. A cover carried by the base encloses the blower-motor unit or units and also defines a baffled cooling air intake passage for each blower-motor unit. The suction inlet is connected to an intake aperture through a transfer chamber.

Abstract: An exhaust-gas turbocharger includes a low pressure stage having a compressor wheel and a turbine wheel mounted on one shaft and a high pressure stage having a compressor wheel and a turbine wheel mounted on another shaft. The two shafts are arranged coaxially one within the other, and the compressor and turbine units of either stage can be located on the inner or outer shaft.

Abstract: A method of regulating the output of a multistage axial compressor having two coaxial rotors in series. The regulation of the compressor output is effected by varying the head of the medium to be compressed, the variation of the head of the medium being effected, after the medium leaves the stator, by changing the rotational speed of the first rotor, the speed of the second rotor being kept constant. The first rotor is connected to a variable-speed drive motor and the second rotor is connected to a constant-speed drive motor.

Abstract: A waterjet propulsion system having at least two pumps in series so that low from a hull or other intake is directed through a first waterjet propulsion pump; and then via a two-position diverter valve, either out to a thrust nozzle, or to and through a second waterjet propulsion pump having a thrust nozzle. Subsequent series-pump units and diverter valves may follow to provide as many propulsion stages as required for power requirements. Each pump unit is driven by its own power unit which may be shut down when flow is diverted to the preceding unit's thrust nozzle. Good efficiencies are thereby attained over a wide range of power and speed requirements.

Abstract: Submersible electric motor driven inducer equipped centrifugal pump units, especially suitable for the pumping of cryogenic fluids or fluids at their boiling point, and capable of maintaining full flow under low submergence conditions are provided by disconnecting the inducers from co-rotation with the main impeller shaft while still retaining the main shaft for support and are powered by a source in the unit such as a slip coupling, a hydraulic turbine driven by pumpage from the pump impeller, or a separate electric motor. These power sources drive the inducer at speeds slower than the pump impeller to develop the desired suction head for the impeller without drawing excessive power or producing undesirable thrusts and reduce pump-out time for the last few feet of cargo. A hydraulic or magnetic clutch coupling with the main electric motor drive may be used in combination with the turbine power source for the inducer to start the pumping action.