Abstract: A motor or converting fluid pressure to rotational motivation and pump for moving fluid, comprising an outer race centered about a first axis and an inner race centered about a second axis. The first axis is different from, but parallel to, the second axis. A plurality of vanes is coupled for movement relative to the inner race and a fluid is provided into the vane at a pressure sufficient to cause the vane to rotationally drive the inner race relative to the outer race. Alternatively, the inner race may be driven directly to pump fluid between the inner race and the outer race.

Abstract: The scroll-type compressor with an integrated motor of the present invention comprises a housing 1, a fixed scroll 21 fixed to the housing 1, a movable scroll 31 installed eccentrically to the fixed scroll 21, and a motor portion 5, and is characterized in that the housing 1 comprises a high pressure chamber 25 to which compressed gases are supplied, a first cooling chamber 26′ installed contiguous to the high pressure chamber 25 and to which cooling fluid is supplied, a second cooling chamber 42 which cools the motor portion 5 and is supplied with the cooling fluid, and a fluid passage 7 that connects the first cooling chamber 26′ and the second cooling chamber 42 and passes the cooling fluid in the direction from the first cooling chamber 26′ to the second cooling chamber 42.

Abstract: To provide a gear pump for carrying high viscous liquid, which keeps a bearing in a free state and enhances reliability relative to a leakage of cooling medium and a leakage of molten resins.

Abstract: In a trochoidal design rotary piston engine, side disks are intended to be assembled from one cast side section and a cover disk, where the side section and the cover disks are used in a sealing function. The side section includes cast in reinforcing ribs on a side thereof facing away from the engine combustion chamber.

Abstract: An improved housing for scroll compressor has the end cap housing formed integrally with the fixed scroll member. The end cap housing is preferably welded to a tubular housing enclosing the scroll compressor. Most preferably, the end housing has inner and outer tubular portions and the tubular housing extends upwardly into a channel between the inner and outer tubular portions. A muffler is preferably formed integrally with the end cap and extends to a side of the end cap. The present invention further includes heat transfer fins extend from the end cap. The positioning of the muffler to the side decreases the overall length of the compressor. The use of the fins increases the efficiency of compression as heat is removed from the compression chambers. The use of the unique combined end cap and fixed scroll which is welded to the tubular housing simplifies assembly.

Abstract: The rotary piston machine with an axial direction of delivery from the top downwards, in particular of screw spindle-type construction, with cooling ducts (12) for the motors (8), bearings (7) and sensors (9), through which ducts a cooling fluid flows, and with a cooling device for the pump space (3) is characterized in that the casing (2) of the pump space (3) has a closed annular space (15) which is partially filled with a liquid, which is cooled by the cooling fluid via heat exchanger surfaces (18).

Abstract: In accordance with the invention, the vacuum pump cooling system includes tubes expanded along their entire length in bores through the vacuum pump body. The tubes can be made of stainless steel, and inserted into a vacuum pump body made of cast iron. This prevents the risk of corrosion of the vacuum pump body by a cooling liquid passing through the tubes to cool the vacuum pump body.

Abstract: A scroll compressor includes a non-orbiting scroll wherein the base is sealed to the housing. That is, the non-orbiting scroll provides the function of the scroll member, and also the function typically provided by a separator. A heat shield is positioned between the discharge pressure chamber and the base of the non-orbiting scroll. Leakage paths are provided to allow refrigerant to communicate between the discharge pressure chamber and spaces between the heat shield and the non-orbiting scroll.

Abstract: A method stabilizes the temperature in a gear pump lubricated with material to be delivered. At least one housing part has at least two slide bearings in which shafts are mounted and are lubricated by medium to be delivered. A medium is adjusted in a temperature stabilizer to a predetermined temperature and then flows firstly through the housing part and secondly through shafts and/or slide bearings to stabilize the temperature.

Abstract: A scroll fluid machine requiring no crank shaft to orbitably support an orbiting scroll member and capable of being reduced in overall size in the axial direction. In a casing, two fixed scroll members are provided on the axis of the casing, and an electric motor is provided between the fixed scroll members. Eccentric bearings each having an outer ring, an intermediate ring and an inner ring are provided between the electric motor and the fixed scroll members. The inner periphery of each intermediate ring is formed with an axis eccentric with respect to the axis of the casing. Orbiting scroll members are integrated with the inner rings through an orbiting shaft. The orbiting shaft is caused to orbit by rotating a rotating shaft with the electric motor, thereby causing the orbiting scroll members to orbit relative to the fixed scroll members.

Abstract: A refrigerating apparatus comprising a refrigeration cycle comprising at least a compressor, a condenser, a dryer, an expansion mechanism and an evaporator, a refrigerant composed mainly of a fluorocarbon type refrigerant containing no chlorine and having a critical temperature of 40° C. or higher, and a refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids which contains at least two ester linkages in the molecule and has a viscosity at 40° C. of 2 to 70 cSt and a viscosity at 100° C. of 1 to 9 cSt.

Abstract: A rotary compressor includes a cylinder having a slot, an eccentric shaft disposed in the cylinder, a roller formed around the shaft, a vane inserted into the slot and having grooves on its surface, and a sealing material inserted into the grooves. The sealing material prevents leakage and influx of gas through a gap between the cylinder and the vane, improving the efficiency of a rotary compressor.

Abstract: A temperature control system for a vacuum pump comprising means through which can flow a temperature control fluid, and a thermal resistor located between said means and a surface of the vacuum pump whose temperature is to be controlled.

Abstract: A first lubricating oil passage and a second lubricating oil passage, extended from a contacting surface between a partition wall and a fixed scroll are formed in the partition wall (middle housing). A recess for communicating the first lubricating oil passage with the second lubricating oil passage is formed on the fixed scroll. Accordingly, the lubricating oil amount between the first lubricating oil passage and the second lubricating oil passage is easily controlled by adjusting the size of the recess.

Abstract: It is an improvement of a package-type compressor that is used for the air compression, refrigerating and air conditioning. The compressor is a double scroll compressor that a laps are formed on both sides of an end plate of orbiting scroll. A scroll compressor element is disposed above a motor and a dryer is disposed further above the scroll compressor element. A cooling fan is installed in the motor. A cooler that cools operation gas through the compressor element is disposed above the cooling fan. A partition plate defines a first flow passage for cooling the motor and the compressor element and a second flow passage for cooling the cooler. A first suction port sucking external air to the first and second flow passages is provided on a casing side wall locating in a direction extending from the motor shaft. A suction partitioning plate is attached to a casing side wall opposite to the casing side wall having the first suction port. The second suction port is lower than the first suction port.

Abstract: A rotary device (11) has a first rotor (12) rotatable about a first axis and having at its periphery a recess (14). A second rotor (13) is counter-rotatable to said first rotor (12) about a second axis, parallel to said first axis, and has a radial lobe (15). The first and second rotors (12,13) are coupled for rotation and are intermeshed such that, for a portion of the rotation of the rotors (12,13), there is defined between the first and second rotors (12,13) a transient chamber of volume which progressively decreases on rotation of the rotors (12,13). Means (27,28) are provided for monitoring the clearance between the rotors (12,13). Means for adjusting the clearance between the rotors (12,13) are provided.

Abstract: Methods of sealing a planetary rotor engine, and the resulting seals, are described which improve the engine's efficiency and solves each of three main problem areas. A first method and resulting dynamic seal for sealing the rotor face surfaces as they translate across one another to constantly reform the contact between each other includes the key step of moving the shaft centerlines of each of the rotors, thereby radially positioning the rotors along diametric axes at positions which compensate for varying thermodynamic conditions (e.g. thermal expansion or contraction of rotor materials). A second method and resulting dynamic seal for effectively minimizing leakage between the end space formed between the rotor end and the case includes the key step of introducing a surface depression of any shape on one, or both, of the rotor end and opposing casing, thereby eliminating the need for a frictional seal and, in essence, forming a pressure wave plug.

Abstract: A positive displacement pump is provided which is high both in reliability and in durability being durable in a continuous operation for a long period of time with the suction side of the pump temperature-controlled. In the positive displacement pump, rotors (21, 22) are accommodated in a pump housing (10) to form a plurality of operating chambers (31, 32), in such a manner that the operating chambers (31, 32) are increased on the suction side and decreased on the discharge side. A temperature control system (40) for controlling the temperature (12) of the suction inlet (12) of the pump is provided.

Abstract: A gear pump has a housing, a pump shaft supported in a housing wall by a bearing, and a pumping gear supported on the pump shaft which is operable to pump newtonian and non-newtonian liquid of different densities. A relief collection zone is arranged on a low-pressure side of the bearing for collecting leakage liquid passing through the bearing along the shaft. At least two return ducts or bores are provided which connect the collection or relief zone with a suction side of the pump in order to return the collected leakage liquid.

Abstract: In order to cool the slide bearing area for the slidable bearing of a gear pump shaft, a slide bearing bush with a slide bearing area and, in the case of the guiding-through of a shaft, a sealing area extends in one piece integrally to the outside, and a cooling-medium guiding system provided in the bush is connected from the outside. This eliminates all sealing problems for the cooling medium feeding to the slide bearing area.

Abstract: At least two progressing cavity pumps or pump sections are connected in series. The flow volume rate of the second pump or pump section is less than the flow volume rate of the first pump or pump section. If there are more than two pumps or pumps sections, the flow volume rate of the third pump or pump section would be less than the flow volume rate of the second pump or pump section, and so on. The cascade arrangement of progressing cavity pumps can be achieved by interconnecting separate pump assemblies end to end. The cascade arrangement of progressing cavity pump sections can be achieved by the attachment of the rotor/stator pairs of each pump section in series with suitable universal mechanisms and housings. Such a cascade arrangement of progressing cavity pumps or pump sections allows and compensates for the compressibility of the gas in the two-phase or multi-phase fluid being pumped, especially in pumping operations requiring high differential pressures.

Abstract: A gear pump for conveying fluid media, particularly viscous media, has tube or collar-type sections on the suction side and/or delivery side for connecting the pump in a weldable manner with additional system components.

Abstract: A scroll compressor includes a drive shaft and an auxiliary drive shaft which are rotatably supported by stationary scrolls, and an orbiting scroll rotatably supported on these drive shafts through cranks. A resilient member is provided on the crank so as to allow thermal expansion of the orbiting scroll in a direction, along which the drive shafts are lined. With this construction, a distance between bearings for the orbiting scroll and the stationary scrolls is adjusted in accordance with the thermal expansion, and therefore even when the thermal expansion occurs, a smooth motion of the scroll will not be affected.

Abstract: A heat shield is disposed in a hermetic compressor between a discharge port and a local area on an interior surface of the outer shell toward which relatively hot compressed gas is directed. The local area of the outer shell is thereby insulated from the high temperature of the discharge gas.

Abstract: A method of operating a claw-type vacuum pump with two or more stages, each of which has a suction chamber with a pair of claw rotors and end-located suction and discharge ports. To avoid the possibility of liquids affecting operation of the pump, the invention proposes that the pump is operated without internal compression and that the gases emerging from at least one stage are cooled.

Abstract: A heat shield is disposed in a hermetic compressor between a discharge port and a local area on an interior surface of the outer shell toward which relatively hot compressed gas is directed. The local area of the outer shell is thereby insulated from the high temperature of the discharge gas and the noise and vibrations that are often associated with hot gas impinging on the shell.

Abstract: In a sealed-type scroll compressor having a stationary scroll member and an orbiting scroll member, the stationary scroll member is fixed after rotating it in an orbiting direction of the orbiting scroll member by a predetermined angle from a phase angle position where a possible orbiting radius between both scroll members is made maximum at the temperature before driving the scroll compressor.

Abstract: A scroll compressor has a compression mechanism accommodated in a closed container and comprising a stationary scroll and an orbiting scroll. The stationary scroll includes a frame and a separate wrap element secured to the frame or otherwise movable relative to the frame. The orbiting scroll has a wrap element allowed to undergo circular translation with respect to the wrap element of the stationary scroll to compress gas. The wrap element of the stationary scroll is made of a readily machinable abrasion-resistant material to reduce the manufacturing cost of the scroll compressor.

Abstract: A rotor assembly in which the front and back ends of the rotor are coupled by a shaft assembly extending therethrough. Preferably, the shaft assembly includes a slip joint, such that the shaft is able to accommodate for thermal expansion of the assembly, while maintaining a torsional and bending moment coupling between the front and back ends of the rotor. The rotor assembly is particularly advantageous for use in superchargers having large acceleration and pressure increase requirements, such as superchargers utilized in drag racing. However, the rotor assembly may also be utilized in other devices such as blowers, compressors, or vacuum pumps which may have large acceleration requirements.

Abstract: A gear pump comprises rotors disposed in roller bearings. For the delivery of very viscous polymer meltings, bearings surfaces of at least one of inner races, outer races of the bearings and bearing surfaces of roller elements are made of a steel with a high-temperature stability. Bearing takes place on material pairings consisting of one of S6-5-2 high-speed steel and silicon nitride Si.sub.3 N.sub.4. The roller bearings are either unlubricated or lubricated by a lubricant remaining in the bearing, preferably a solid-substance lubrication. A distance of supported shafts, from a gearwheel face to a supporting area of the shafts, determined by the outer contact point in the roller bearing, is smaller than twice the median diameter of the shafts therealong.

Abstract: The purpose of regenerative heat exchangers is to transfer the heat from one step or process of a cycle or system to an earlier step or process in the cycle or system such that the transferred heat is usefully absorbed rather than being discarded. The gas being heated is moved in a counter flow relative to the hotter fluid while being trapped between moving partitions (vanes) such that the gas so trapped is heated with a fixed volume with an increase in pressure as well as temperature. In some embodiments, the hotter as well as the cooler fluid is moved while trapped between moving partitions (vanes) so, as the cooler fluid being heated is thermally pressurized, the hotter fluid being cooled with a fixed volume is thermally pressurized. Materials and design details are selected to enhance the heat transfer between the two streams.

Abstract: The scroll wrap section of an orbitally operating scroll comprises a flat outer circumferential section, a flat inner circumferential section, and a linearly inclined section. During the initial period of compression operation, a very small axial gap is formed between the flat outer circumferential surface of the flat outer circumferential section and the bottom of the other scroll component to allow the air to be reliably contained in the outermost circumferential compression chamber. When the compressor is warmed, the compression heat generated by the air sucked from the suction port causes the inclined section to substantially reduce the axial gap between the inclined section and the bottom of the fixed scroll component and between the inner circumferential flat section and the bottom of the fixed scroll component.

Abstract: A single-stage vane compressor is provided which includes a casing that has a bore hole running from one end to another end, an outer contour, a water-cooled jacket, a rotor eccentrically arranged in the casing borehole and a rotational axis symmetric with the outer contour of the casing. The rotor has a top dead center position and a bottom dead center position, and the bore hole is arranged in the casing so as to be eccentric to the rotor axis toward the top dead center. A suction flange and an ejection flange are arranged opposite one another in the casing jacket along a common axis normal to the rotor axis, which common axis forms an axis of symmetry with the outer contour of the casing. Two axially parallel walls are arranged in the jacket in a vertical plane of symmetry so as to divide the cooling jacket relative to a suction side and an ejection side. Additionally, two water-cooled covers are provided, one of the covers being arranged on each end of the casing so as to cover the bore hole.

Abstract: Apparatus and process for handling thermoplastic liquified material is disclosed. A system including an extruder feeding into a degasifying chamber is disposed upstream of a gear pump for pressurizing the material. The extruder gravity delivering, by way of a multiple-billet die, billets to the gears outside of the gear meshing area.

Abstract: A heat shield is disposed in a hermetic compressor between a discharge port and a local area on an interior surface of the outer shell toward which relatively hot compressed gas is directed. The local area of the outer shell is thereby insulated from the high temperature of the discharge gas.

Abstract: A scroll compressor includes a fixed scroll member and an orbiting scroll. The orbiting scroll member is operatively connected to a motor to be driven in an orbiting motion by the motor. The scroll members each include a plate having an inboard surface and an outboard surface. A spiral involute or wrap is formed on the inboard surface of each scroll member plate. The involutes mate to define suction zones at outer ends of the involutes and fluid pockets. The fixed scroll member defines a fluid outlet at the center of the involutes and two inlets positioned proximate the suction zones. At least two idler crank assemblies are provided to maintain the phase relationship and running clearance between the scroll members. The idler crank assemblies each include two operatively connected cranks, one being in the fixed scroll and one being in the orbiting scroll. The fixed scroll crank is externally accessible so that its rotational motion may be harnessed to drive a fan or another compressor stage, for example.

Abstract: A gear pump comprising a housing for housing gear pump rotors in a housing interior, said housing having a housing end at an end face side of the housing through which at least one pump rotor shaft is guided from the housing interior to outside the housing, a shaft bearing in the housing end for rotatably supporting the rotor shaft, and a labyrinth seal in the housing end which in use surrounds the rotor shaft, wherein the shaft bearing is arranged separately from the labyrinth seal at a position spaced axially inward toward the housing interior with respect to the labyrinth seal.

Abstract: An air-cooled oil-free rotary-type compressor in accordance with the invention includes a first air cooler including a plurality of cooling pipes, a check valve, and a second air cooler. The first air cooler, the check valve and the second air cooler are provided in a passage of compressed air discharged from a compressor body. The second air cooler is disposed in a first cooling air flow direction and the second air cooler is disposed in a second cooling air flow direction substantially perpendicular to the first cooling air flow direction. The plurality of cooling pipes of the first air cooler are arranged along the second cooling air flow direction.

Abstract: A positive displacement, recirculating Roots-type rotary gas compressor which operates on the basis of flow work compression is disclosed. The compressor includes a pair of large diameter recirculation conduits (30 and 32) which return compressed discharge gas to the compressor housing (16), where it is mixed with low pressure inlet gas, thereby minimizing adiabatic heating of the gas. The compressor includes a pair of involutely lobed impellers (12 and 14) and an associated port configuration which together result in uninterrupted flow of recirculation gas. The large diameter recirculation conduits equalize and accelerate gas flow velocities within the compressor and minimize gas flow losses. The compressor is particularly suited to applications requiring sustained operation at higher gas compression ratios than have previously been feasible with rotary pumps, for example continuous pumping of natural gas in gas transmission facilities.

Abstract: The present invention is to prevent heat exchange between sucked gas in a portion of a suction duct and hot gas within a casing, the portion of the suction duct extending in a closed casing. A gas compressed in a cylinder is introduced into an outer intermediate radiator, and the cooled compressed gas is refluxed to a closed casing through a return duct. A duplex connection duct which has an inner duct and an outer duct coaxially combined is connected to a connection end portion of the suction duct on the compressor side, the inner duct communicating to the suction duct whereas the outer duct communicates to the return duct. The return duct is connected to the outer duct on the outside of the closed casing, and this outer duct is formed open at one end in the inside of the closed casing.

Abstract: An oil-free scroll compressor comprising a plurality of oil-free scroll compressing mechanism blocks, each for compressing a gas, and a motor or motors for driving the plurality of oil-free scroll compressing mechanism blocks. In operation, an air is suctioned into the compressor through a filter and a throttle valve and then divided and sucked into first and second oil-free scroll compressing mechanism blocks, which act to increase the pressure of the air to a predetermined pressure. The compressed air is cooled by an after-cooler and supplied to the compressed air user side. The scroll compressing mechanism blocks are driven by a dual-shaft motor through belts. Under no-load condition, the throttle valve is closed and a release valve is opened, whereby the compressed air held between the blocks and check valves is released.

Abstract: A heat shield is disposed in a hermetic compressor between a discharge port and a local area on an interior surface of the outer shell toward which relatively hot compressed gas is directed. The local area of the outer shell is thereby insulated from the high temperature of the discharge gas.

Abstract: A rotating spiral pump comprises a housing in which two displacement disks are rotatably disposed. The two displacement disks are provided on one side with ribs that extend in spiral fashion and interlock for the purpose of forming pumping chambers, and seal against the opposite displacement disk with their free face ends. The spirally extending ribs are embodied in several steps. The plurality of steps are spatially separated from each other by the formation of an space, and the radially outer step has at least twice as many pumping chambers as the radially inner step. Cooling means in the form of cooling ribs are preferably provided in the space, between the outlet of the radially outer step and the inlet of the radially inner step.

Abstract: A rotary blade air conditioner compressor is provided which includes a compressor housing having a cylindrical chamber. Chamber covers are mounted to respective ends of the cylindrical chamber. A reservoir is fluidly connected to an outlet and an inlet of the cylindrical chamber. A drive shaft is eccentrically mounted within the cylindrical chamber, with a rotor mounted on the drive shaft which is axially movable along the drive shaft. A plurality of radial slots are formed in the rotor which receive blade members that move radially in the slots to continuously contact the inner wall of the cylindrical chamber for expelling a mixture of gas and oil from the chamber. The gas and oil mixture comes from the reservoir and is supplied through a conduit to each end of the cylindrical chamber to axially displace the rotor with respect to the chamber covers.

Abstract: In a compressor where an oil pump is driven by a crankshaft through a drive tang with oil passing through the drive tang. The bolts holding the drive tang in place tend to agitate the oil and create foam. To prevent foam from being drawn into the oil pump, the agitation is isolated by a sub-chamber defined in part by a spring retainer while oil is supplied via a tube extending through the sub-chamber.

Abstract: A thermal isolation arrangement for use in a co-rotating scroll refrigerant compressor includes various thermal insulation elements adapted to minimize heat transfer between hot rotating members of the scroll fluid device and the return refrigerant to be compressed, and between hot lubricant in the compressor and the return refrigerant. The thermal isolation elements of the present invention may be used individually or collectively to minimize the preheating of the inlet refrigerant so as to maintain the density of the return refrigerant being compressed to thereby increase the total efficiency of the scroll fluid device.

Abstract: A pressurized fluid-driven engine includes an engine chamber defined by a housing having one or more endplates which include serpentine channels for the flow of temperature-regulating fluid. Preferably, each endplate has a pair of channels that each has a scroll pattern. The temperature-regulating fluid may be the same fluid that is employed in driving the engine. The fluid is utilized both to preheat the engine and to cool the engine during use. The engine may be coupled to a generator for the production of electrical energy.

Abstract: An air-cooled oil-free screw compressor is provided with a first lubricating oil circulating flowpassage 1 which extends from an oil tank 20 via an oil pump 21 and an air heat exchanger 22 to cooling jackets 15 and 16 for cooling compressor bodies 12 and 13. A second such passage is connected between the cooling jackets and the oil tank and includes an oil filter 23, lubricating oil.

Abstract: A scroll fluid apparatus has a revolving scroll and an auxiliary crank as a rotation prevention mechanism. The revolving scroll has a two-layer structure including an auxiliary member having an annular plate portion, and an end plate member having an end plate, the two members being superposed axially. A positioning mechanism is provided between the auxiliary member and the end plate member to position and unite them in a circumferential direction. When the end plate member expands radially due to a rise in temperature, the end plate is displaced radially while being in sliding contact with the annular plate portion. The end plate is fastened to the annular plate portion through a bolt portion at the center thereof, where the amount of radial displacement due to the thermal expansion is the smallest. Accordingly the annular plate portion is not displaced radially and thus, no radial load acts on the auxiliary crank.

Abstract: A machine of the fluid entrainment or the positive displacement type, such as a compressor or a vacuum pump, in which injection of dry gas is effected in the discharge region of said machine or of one of its stages, wherein said injection is effected in a distributed manner over a surface.