US20070031267A1 - Machine with a rotatable rotor - Google Patents
Machine with a rotatable rotor Download PDFInfo
- Publication number
- US20070031267A1 US20070031267A1 US11/497,564 US49756406A US2007031267A1 US 20070031267 A1 US20070031267 A1 US 20070031267A1 US 49756406 A US49756406 A US 49756406A US 2007031267 A1 US2007031267 A1 US 2007031267A1
- Authority
- US
- United States
- Prior art keywords
- machine
- pump
- suction device
- housing
- suction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/20—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
Definitions
- This invention relates to a machine with a rotor that is located so that it can rotate in a housing.
- the rotor is located at least partly in fluid, such as a coolant.
- a housing pressure of at least 1.5 bar is built up in the housing by means of suitable resistances in an outlet line that leads from the housing to a reservoir.
- fluid such as coolant, for example
- the rotor rotates partly or completely in the fluid.
- High heat removal and, thus, high cooling capacity can be achieved and, thus, the machine can be operated at high output.
- high losses occur, in particular churning losses, on account of the viscous friction of the fluid, which, in turn, results in low efficiency of the machine.
- An object of this invention is to provide a machine of the general type described above but that has lower losses and higher cooling capacity than known machines.
- the invention teaches that the housing pressure can be reduced such that the fluid transitions into the two-phase range. According to the invention, therefore, the internal pressure in the housing is reduced, for example, to a value of less than approximately 0.8 bar, so that the fluid which is saturated at the ambient temperature transitions to super-saturation and releases gas.
- This resulting two-phase fluid having a liquid phase and a gas phase, where the area of separation of the phases is in the vicinity of the rotor, has significantly lower viscous friction.
- reduced losses, in particular churning losses occur on the rotating rotor and, thus, the machine has a higher level of efficiency.
- the cooling capacity remains almost unchanged on account of the almost uniform and unchanging quantity of fluid.
- the housing pressure can be reduced by means of a suction device.
- a suction device With a suction device, it is possible to easily generate a vacuum to reduce the pressure inside the housing.
- the pressure side of the suction device can be connected with a reservoir.
- the suction device can easily be located in the outlet line that runs from the housing to the reservoir and is already present.
- the pressure side of the suction device is realized in the form of a delivery line.
- a suction line of this type an additional user can therefore be supplied with fluid. If hydraulic fluid is used as the fluid, it thereby becomes possible with the suction device to supply another user with hydraulic fluid, e.g., a feed circuit or a steering device.
- a stop valve such as a check valve, that opens in the delivery direction. It thereby becomes possible for the suction device to produce a vacuum to reduce the housing pressure.
- a bypass line is provided, which is in communication with the outlet line, and bypasses the suction device, and which can be used to equalize the pressure if the housing is totally evacuated by the suction device.
- the suction device has a pump.
- a pump is a simple and easy way to generate a vacuum to reduce the pressure inside the housing.
- the suction device has a vacuum limiting device.
- a vacuum limiting device an excessive vacuum, which can cause the liquid to foam, can be easily prevented. It thereby becomes possible to guarantee a satisfactory and reliable lubrication of the roller bearings that support the rotor by the fluid.
- the vacuum choke is thereby advantageously realized in the form of a control valve, which is associated with the suction side of the pump, and is pushed toward a closed position by a spring and toward an open position by the housing pressure.
- the vacuum limiting device is formed by a pressure compensator that is associated with the pump.
- the pressure compensator can be preferably realized in the form of a control valve, which is located in a pump bypass line, and is pushed toward an open position by a spring and toward a closed position by the housing pressure.
- the vacuum produced by the pump can also be easily and reliably limited by adjusting the spring on a pressure compensator of this type.
- the suction device can be in a drive connection with the machine, as a result of which no separate drive device needs to be provided for the drive of the suction device.
- the pump of the suction device can be formed by a separate pump, which is used only for the generation of a vacuum in the housing.
- a machine incorporating features of the invention is used in a drive system with a booster pump, with the booster pump realized in the form of a pump of the suction device. Consequently, the booster pump of the drive system, which is already present, such as, for example, a feed pump for the supply of a feed circuit or a steering pump for the supply of a steering device, can be used to generate the vacuum in the housing, whereby there is a low construction expense for the machine.
- the pump can be in communication by means of a suction line with a reservoir. As a result of which, it is possible to easily achieve an additional suction-side connection of the booster pump, which is already present, to the reservoir to supply the users that are supplied by the pump with hydraulic fluid.
- the machine is realized in the form of an electrical machine, for example in the form of a synchronous or asynchronous machine.
- the machine can be realized in the form of a hydraulic machine, for example in the form of an axial piston machine, utilizing the swashplate construction with a cylinder drum that forms the rotor.
- FIG. 1 shows a machine of the invention in a schematic illustration
- FIG. 2 a shows a first embodiment of a suction device
- FIG. 2 b shows a second embodiment of a suction device
- FIG. 2 c shows an additional embodiment of a suction device.
- FIG. 1 shows a machine 1 of the invention in the form of an electrical machine or a hydraulic machine, having a rotor 3 which is located so that it can rotate in a housing 2 .
- the interior of the housing 2 is at least partly and preferably completely filled with fluid, for example with coolant in the form of hydraulic fluid.
- the interior of the housing 2 is connected to an outlet line 5 which runs to a reservoir 6 .
- the section of the outlet line 5 that is in communication with the interior of the housing 2 is connected to the suction side of a suction device 7 .
- the section of the outlet line 5 that is connected to the pressure side of the suction device 7 leads to the reservoir 6 .
- a stop valve 8 In the outlet line 5 , downstream of the suction device 7 , there is a stop valve 8 , which can be realized in the form of a check valve that opens toward the reservoir 6 .
- a cooler device 9 and a filter device 10 Downstream of the stop valve 8 , in the outlet line 5 , are a cooler device 9 and a filter device 10 .
- a bypass line 5 a is connected to the outlet line 5 .
- FIG. 2 a shows a first embodiment of a suction device 7 .
- the suction device 7 has a pump 11 which is connected on the suction side to the section of the outlet line 5 that is connected with the housing 2 , and with the pressure side emptying into the section of the outlet line 5 that leads to the reservoir 6 .
- the suction device 7 has a vacuum limiting device 12 , which is formed by a vacuum choke 13 that is associated with the pump 11 .
- the vacuum choke 13 is formed by a control valve that acts as a choke in intermediate positions, is associated with the suction side of the pump 11 , and is pushed toward a closed position 13 a by a spring 14 and toward an open position 13 b by the housing pressure that is present in the outlet line 5 .
- a control pressure line 15 is provided which runs from the section of the outlet line 5 that is in connection with the housing to a control surface of the vacuum choke 13 that acts toward the open position 13 b.
- the vacuum limiting device 12 is formed by a pressure compensator 16 that is associated with the pump 11 .
- the pressure compensator 16 is realized in the form of a control valve that acts as a choke in intermediate positions, and is located in a pump bypass line 17 that is connected to the outlet line 5 .
- the pressure compensator 16 that is realized in the form of a control valve is pushed toward an open position 16 a by a spring 19 and toward a closed position 16 b by the housing pressure.
- a control surface of the pressure compensator 16 that acts toward the closed position 16 b is connected to a control pressure line 18 , which is connected to the section of the pump bypass line 17 , and which is in communication with the section of the outlet line 5 that is in communication with the housing 2 .
- the pump 11 is realized in the form of a separate pump, which is provided exclusively for the production of a vacuum in the interior of the housing 2 of the machine 1 .
- the pump 11 is formed by a booster pump which is already present, for example a feed pump for the supply of a feed circuit or of a steering pump for the supply of a steering system or a hydraulic pump for the supply of additional users, for example of a hydraulic system, for the operation of a mobile industrial truck.
- the section of the outlet line 5 that is connected to the pressure side of the suction device 7 is realized in the form of the delivery line of the pump 11 .
- the suction side of the pump 11 is connected to a suction line 20 , which is in communication with the reservoir 6 .
- the suction line 20 is connected with the section of the outlet line 5 that leads to the suction side of the pump 11 downstream of the vacuum limiting device 12 .
- the pump 11 can be associated with a vacuum limiting device 12 as illustrated in FIG. 2 a. It is also possible to provide a vacuum limiting device 12 as illustrated in FIG. 2 b.
- the pump 11 of the suction device 7 can be in a drive connection with the machine 1 . It is also possible to provide a separate driver motor, such as an electric motor for example, a hydraulic motor, or an internal combustion motor.
- the machine can be an electrical machine, e.g., in the form of a synchronous or asynchronous machine, or in the form of a hydraulic machine, for example in the form of an axial piston machine that utilizes a swashplate construction, whereby the cylinder drum forms the rotor.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
- This application claims priority to German Application No. 10 2005 038 273.8, filed Aug. 12, 2005, and German Application No. 10 2005 036 307.5, filed Aug. 2, 2005, both of which applications are herein incorporated by reference in their entirety.
- 1. Field of the Invention
- This invention relates to a machine with a rotor that is located so that it can rotate in a housing. The rotor is located at least partly in fluid, such as a coolant.
- 2. Technical Considerations
- On similar machines of the known art, a housing pressure of at least 1.5 bar is built up in the housing by means of suitable resistances in an outlet line that leads from the housing to a reservoir. On machines of this type where the housing is partly or completely filled with fluid, such as coolant, for example, the rotor rotates partly or completely in the fluid. High heat removal and, thus, high cooling capacity can be achieved and, thus, the machine can be operated at high output. At high speeds of rotation, however, high losses occur, in particular churning losses, on account of the viscous friction of the fluid, which, in turn, results in low efficiency of the machine.
- An object of this invention is to provide a machine of the general type described above but that has lower losses and higher cooling capacity than known machines.
- The invention teaches that the housing pressure can be reduced such that the fluid transitions into the two-phase range. According to the invention, therefore, the internal pressure in the housing is reduced, for example, to a value of less than approximately 0.8 bar, so that the fluid which is saturated at the ambient temperature transitions to super-saturation and releases gas. This resulting two-phase fluid having a liquid phase and a gas phase, where the area of separation of the phases is in the vicinity of the rotor, has significantly lower viscous friction. As a result of which, reduced losses, in particular churning losses, occur on the rotating rotor and, thus, the machine has a higher level of efficiency. The cooling capacity remains almost unchanged on account of the almost uniform and unchanging quantity of fluid.
- In one preferred non-limiting embodiment of the invention, the housing pressure can be reduced by means of a suction device. With a suction device, it is possible to easily generate a vacuum to reduce the pressure inside the housing.
- Preference is thereby given to a connection between an outlet line that is in communication with the housing and a suction side of the suction device.
- In one embodiment of the invention, the pressure side of the suction device can be connected with a reservoir. As a result, the suction device can easily be located in the outlet line that runs from the housing to the reservoir and is already present.
- In an additional advantageous embodiment of the invention, the pressure side of the suction device is realized in the form of a delivery line. With a suction line of this type, an additional user can therefore be supplied with fluid. If hydraulic fluid is used as the fluid, it thereby becomes possible with the suction device to supply another user with hydraulic fluid, e.g., a feed circuit or a steering device.
- In one development of the invention, in the outlet line downstream of the suction line there is a stop valve, such as a check valve, that opens in the delivery direction. It thereby becomes possible for the suction device to produce a vacuum to reduce the housing pressure.
- Preferably, a bypass line is provided, which is in communication with the outlet line, and bypasses the suction device, and which can be used to equalize the pressure if the housing is totally evacuated by the suction device.
- In one preferred embodiment of the invention, the suction device has a pump. A pump is a simple and easy way to generate a vacuum to reduce the pressure inside the housing.
- In one development of the invention, the suction device has a vacuum limiting device. With a vacuum limiting device, an excessive vacuum, which can cause the liquid to foam, can be easily prevented. It thereby becomes possible to guarantee a satisfactory and reliable lubrication of the roller bearings that support the rotor by the fluid.
- The vacuum choke is thereby advantageously realized in the form of a control valve, which is associated with the suction side of the pump, and is pushed toward a closed position by a spring and toward an open position by the housing pressure. With a vacuum choke of this type, the vacuum in the housing produced by the pump can be limited easily and reliably by the adjustment of the spring.
- In an additional preferred embodiment of the invention, the vacuum limiting device is formed by a pressure compensator that is associated with the pump.
- The pressure compensator can be preferably realized in the form of a control valve, which is located in a pump bypass line, and is pushed toward an open position by a spring and toward a closed position by the housing pressure. The vacuum produced by the pump can also be easily and reliably limited by adjusting the spring on a pressure compensator of this type.
- The suction device can be in a drive connection with the machine, as a result of which no separate drive device needs to be provided for the drive of the suction device.
- It is also possible to provide a separate drive motor for the drive of the suction device, such as an electric motor or a hydraulic motor or an internal combustion motor. As a result of which, the suction device can be driven in a simple manner.
- The pump of the suction device can be formed by a separate pump, which is used only for the generation of a vacuum in the housing.
- It is particularly advantageous if a machine incorporating features of the invention is used in a drive system with a booster pump, with the booster pump realized in the form of a pump of the suction device. Consequently, the booster pump of the drive system, which is already present, such as, for example, a feed pump for the supply of a feed circuit or a steering pump for the supply of a steering device, can be used to generate the vacuum in the housing, whereby there is a low construction expense for the machine.
- The pump can be in communication by means of a suction line with a reservoir. As a result of which, it is possible to easily achieve an additional suction-side connection of the booster pump, which is already present, to the reservoir to supply the users that are supplied by the pump with hydraulic fluid.
- In one preferred embodiment of the invention, the machine is realized in the form of an electrical machine, for example in the form of a synchronous or asynchronous machine. As a result of the reduction of the churning losses of the rotor in accordance with the invention, a high output can be achieved with low losses, and, thus, high efficiency, on an electrical machine of the invention.
- In an additional preferred embodiment, the machine can be realized in the form of a hydraulic machine, for example in the form of an axial piston machine, utilizing the swashplate construction with a cylinder drum that forms the rotor. As a result of the reduction of the churning losses of the rotating cylinder drum of the invention, it is thereby possible to operate the axial piston machine at high speeds of rotation and low losses, and thereby with high efficiency.
- Additional advantages and details of the invention are explained in greater detail below on the basis of the exemplary embodiments which are illustrated in the accompanying schematic figures, in which like reference numbers identify like parts throughout.
-
FIG. 1 shows a machine of the invention in a schematic illustration; -
FIG. 2 a shows a first embodiment of a suction device; -
FIG. 2 b shows a second embodiment of a suction device; and -
FIG. 2 c shows an additional embodiment of a suction device. -
FIG. 1 shows a machine 1 of the invention in the form of an electrical machine or a hydraulic machine, having a rotor 3 which is located so that it can rotate in ahousing 2. The interior of thehousing 2 is at least partly and preferably completely filled with fluid, for example with coolant in the form of hydraulic fluid. The interior of thehousing 2 is connected to anoutlet line 5 which runs to areservoir 6. - The section of the
outlet line 5 that is in communication with the interior of thehousing 2 is connected to the suction side of asuction device 7. The section of theoutlet line 5 that is connected to the pressure side of thesuction device 7 leads to thereservoir 6. In theoutlet line 5, downstream of thesuction device 7, there is astop valve 8, which can be realized in the form of a check valve that opens toward thereservoir 6. Downstream of thestop valve 8, in theoutlet line 5, are a cooler device 9 and afilter device 10. - To bypass the
suction device 7, abypass line 5 a is connected to theoutlet line 5. -
FIG. 2 a shows a first embodiment of asuction device 7. Thesuction device 7 has apump 11 which is connected on the suction side to the section of theoutlet line 5 that is connected with thehousing 2, and with the pressure side emptying into the section of theoutlet line 5 that leads to thereservoir 6. - The
suction device 7 has avacuum limiting device 12, which is formed by avacuum choke 13 that is associated with thepump 11. Thevacuum choke 13 is formed by a control valve that acts as a choke in intermediate positions, is associated with the suction side of thepump 11, and is pushed toward a closed position 13 a by aspring 14 and toward an open position 13 b by the housing pressure that is present in theoutlet line 5. For this purpose, acontrol pressure line 15 is provided which runs from the section of theoutlet line 5 that is in connection with the housing to a control surface of thevacuum choke 13 that acts toward the open position 13 b. - In the embodiment illustrated in
FIG. 2 b, thevacuum limiting device 12 is formed by apressure compensator 16 that is associated with thepump 11. Thepressure compensator 16 is realized in the form of a control valve that acts as a choke in intermediate positions, and is located in apump bypass line 17 that is connected to theoutlet line 5. The pressure compensator 16 that is realized in the form of a control valve is pushed toward an open position 16 a by aspring 19 and toward a closed position 16 b by the housing pressure. For this purpose, a control surface of thepressure compensator 16 that acts toward the closed position 16 b is connected to acontrol pressure line 18, which is connected to the section of thepump bypass line 17, and which is in communication with the section of theoutlet line 5 that is in communication with thehousing 2. - The
pump 11, as illustrated inFIGS. 2 a and 2 b, is realized in the form of a separate pump, which is provided exclusively for the production of a vacuum in the interior of thehousing 2 of the machine 1. - In the embodiment illustrated in
FIG. 2 c, thepump 11 is formed by a booster pump which is already present, for example a feed pump for the supply of a feed circuit or of a steering pump for the supply of a steering system or a hydraulic pump for the supply of additional users, for example of a hydraulic system, for the operation of a mobile industrial truck. The section of theoutlet line 5 that is connected to the pressure side of thesuction device 7 is realized in the form of the delivery line of thepump 11. For the connection of thepump 11 with thereservoir 6, the suction side of thepump 11 is connected to asuction line 20, which is in communication with thereservoir 6. Thesuction line 20 is connected with the section of theoutlet line 5 that leads to the suction side of thepump 11 downstream of thevacuum limiting device 12. - The
pump 11 can be associated with avacuum limiting device 12 as illustrated inFIG. 2 a. It is also possible to provide avacuum limiting device 12 as illustrated inFIG. 2 b. - The
pump 11 of thesuction device 7 can be in a drive connection with the machine 1. It is also possible to provide a separate driver motor, such as an electric motor for example, a hydraulic motor, or an internal combustion motor. - The machine can be an electrical machine, e.g., in the form of a synchronous or asynchronous machine, or in the form of a hydraulic machine, for example in the form of an axial piston machine that utilizes a swashplate construction, whereby the cylinder drum forms the rotor.
- It will be readily appreciated by those skilled in the art that modifications may be made to the invention without departing from the concepts disclosed in the foregoing description. Accordingly, the particular embodiments described in detail herein are illustrative only and are not limiting to the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalents thereof.
Claims (19)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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DE102005036307.5 | 2005-08-02 | ||
DE102005036307 | 2005-08-02 | ||
DE102005038273.8 | 2005-08-12 | ||
DE102005038273A DE102005038273A1 (en) | 2005-08-02 | 2005-08-12 | Machine with a rotatable rotor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070031267A1 true US20070031267A1 (en) | 2007-02-08 |
Family
ID=37670095
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/497,564 Abandoned US20070031267A1 (en) | 2005-08-02 | 2006-08-01 | Machine with a rotatable rotor |
Country Status (3)
Country | Link |
---|---|
US (1) | US20070031267A1 (en) |
DE (1) | DE102005038273A1 (en) |
FR (1) | FR2890253A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3739209A1 (en) * | 2019-05-13 | 2020-11-18 | ESAM S.p.A. | Piston compressor for medical use |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011103026A1 (en) | 2011-06-01 | 2012-12-06 | Linde Material Handling Gmbh | Rotor machine, particularly hydrostatic machine or electric machine, comprises rotor, which is rotatably arranged in housing inner space of housing, where housing is partially filled with fluid |
Citations (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4047561A (en) * | 1974-10-18 | 1977-09-13 | General Electric Company | Cooling liquid de-gassing system |
US4435193A (en) * | 1980-04-07 | 1984-03-06 | Kamyr Ab | Controlling operation of a centrifugal pump |
US4459085A (en) * | 1981-07-17 | 1984-07-10 | Diesel Kiki Company, Ltd. | Pressure control system for automotive pneumatic pressure supply line |
US4681508A (en) * | 1984-11-14 | 1987-07-21 | Kim Choong W | Supercavitation centrifugal pump |
US5078630A (en) * | 1988-10-28 | 1992-01-07 | Nissan Motor Co., Ltd. | Engine cooling system induction arrangement for marine inboard-outboard and outboard engines |
US5085561A (en) * | 1989-12-12 | 1992-02-04 | Mitsubishi Oil Co., Ltd. | Gas removal pump for liquid |
US5217357A (en) * | 1992-09-10 | 1993-06-08 | Welch Robert E | Rotary vane pump with removable particulate collection chamber |
US5536147A (en) * | 1994-08-26 | 1996-07-16 | Paco Pumps, Inc. | Vacuum priming system for centrifugal pumps |
US5622621A (en) * | 1994-03-29 | 1997-04-22 | United Technologies Corporation | Fluid/liquid separator |
US5639224A (en) * | 1993-07-03 | 1997-06-17 | Wabco Vermogensverwaltungs-Gmbh | Device for monitoring pressure or temperature in a compressor |
US5688111A (en) * | 1994-09-06 | 1997-11-18 | Sanden Corporation | Valved suction mechanism of a refrigerant compressor |
US5711789A (en) * | 1990-09-25 | 1998-01-27 | A. Ahlstrom Corporation | Apparatus for pumping gas-containing fiber suspensions |
US5984626A (en) * | 1997-03-26 | 1999-11-16 | Abs Pump Production Ab | Evacuation means for pumps |
US6019947A (en) * | 1998-06-22 | 2000-02-01 | Cavitech, Inc. | Method and apparatus for sterilization of a continuous liquid flow |
US6036449A (en) * | 1998-03-24 | 2000-03-14 | Cummins Engine Company, Inc. | Air compressor control |
US6109886A (en) * | 1997-10-02 | 2000-08-29 | Wabco Gmbh | Compressed-air supply installation with reduced idling power |
US6142748A (en) * | 1999-08-18 | 2000-11-07 | Eastman Chemical Company | Degas piping for pumps |
US6142743A (en) * | 1998-01-28 | 2000-11-07 | Institut Francais Du Petrole | Wet gas compression device and method with evaporation of the liquid |
US6152689A (en) * | 1996-07-26 | 2000-11-28 | Kabushiki Kaisha Yokota Seisakusho | Self-priming type cetrifugal pump |
US6179568B1 (en) * | 1994-02-14 | 2001-01-30 | Phillips Engineering Co. | Piston pump and method of reducing vapor lock |
US6401472B2 (en) * | 1999-04-22 | 2002-06-11 | Bitzer Kuehlmaschinenbau Gmbh | Refrigerant compressor apparatus |
US6428284B1 (en) * | 2000-03-16 | 2002-08-06 | Mobile Climate Control Inc. | Rotary vane compressor with economizer port for capacity control |
US20030039555A1 (en) * | 2001-08-11 | 2003-02-27 | Pioneer Pump Inc. | Self-priming centrifugal pump |
US6629821B1 (en) * | 1999-07-05 | 2003-10-07 | Kabushiki Kaisha Yokota Seisakusho | Pump apparatus |
US20040018099A1 (en) * | 2001-08-01 | 2004-01-29 | Berger Terry A. | Converting a pump for use in supercritical fluid chromatography |
US6692234B2 (en) * | 1999-03-22 | 2004-02-17 | Water Management Systems | Pump system with vacuum source |
US20040151602A1 (en) * | 2001-07-17 | 2004-08-05 | Ivo Daniels | Screw compressor |
US6923007B1 (en) * | 2003-10-16 | 2005-08-02 | Daniel D. Holt | System and method of pumping liquified gas |
US20060035127A1 (en) * | 2002-06-17 | 2006-02-16 | Grasso Albert P | Coolant mixture separator assembly for use in a polymer electrolyte membrane (PEM) fuel cell power plant |
US20060222523A1 (en) * | 2004-12-17 | 2006-10-05 | Dominique Valentian | Compression-evaporation system for liquefied gas |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3294991A (en) * | 1963-01-07 | 1966-12-27 | Task Corp | Induced vaporization cooling of rotary electrical machines |
FR2497019A1 (en) * | 1980-12-18 | 1982-06-25 | Cem Comp Electro Mec | Cooling system for high-speed rotating electrical machine - uses cooling liquid to obtain partial evacuation of machine interior |
-
2005
- 2005-08-12 DE DE102005038273A patent/DE102005038273A1/en not_active Withdrawn
-
2006
- 2006-08-01 US US11/497,564 patent/US20070031267A1/en not_active Abandoned
- 2006-08-01 FR FR0653229A patent/FR2890253A1/en not_active Withdrawn
Patent Citations (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4047561A (en) * | 1974-10-18 | 1977-09-13 | General Electric Company | Cooling liquid de-gassing system |
US4435193A (en) * | 1980-04-07 | 1984-03-06 | Kamyr Ab | Controlling operation of a centrifugal pump |
US4459085A (en) * | 1981-07-17 | 1984-07-10 | Diesel Kiki Company, Ltd. | Pressure control system for automotive pneumatic pressure supply line |
US4681508A (en) * | 1984-11-14 | 1987-07-21 | Kim Choong W | Supercavitation centrifugal pump |
US5078630A (en) * | 1988-10-28 | 1992-01-07 | Nissan Motor Co., Ltd. | Engine cooling system induction arrangement for marine inboard-outboard and outboard engines |
US5085561A (en) * | 1989-12-12 | 1992-02-04 | Mitsubishi Oil Co., Ltd. | Gas removal pump for liquid |
US5711789A (en) * | 1990-09-25 | 1998-01-27 | A. Ahlstrom Corporation | Apparatus for pumping gas-containing fiber suspensions |
US5217357A (en) * | 1992-09-10 | 1993-06-08 | Welch Robert E | Rotary vane pump with removable particulate collection chamber |
US5639224A (en) * | 1993-07-03 | 1997-06-17 | Wabco Vermogensverwaltungs-Gmbh | Device for monitoring pressure or temperature in a compressor |
US6179568B1 (en) * | 1994-02-14 | 2001-01-30 | Phillips Engineering Co. | Piston pump and method of reducing vapor lock |
US5622621A (en) * | 1994-03-29 | 1997-04-22 | United Technologies Corporation | Fluid/liquid separator |
US5536147A (en) * | 1994-08-26 | 1996-07-16 | Paco Pumps, Inc. | Vacuum priming system for centrifugal pumps |
US5688111A (en) * | 1994-09-06 | 1997-11-18 | Sanden Corporation | Valved suction mechanism of a refrigerant compressor |
US6152689A (en) * | 1996-07-26 | 2000-11-28 | Kabushiki Kaisha Yokota Seisakusho | Self-priming type cetrifugal pump |
US5984626A (en) * | 1997-03-26 | 1999-11-16 | Abs Pump Production Ab | Evacuation means for pumps |
US6109886A (en) * | 1997-10-02 | 2000-08-29 | Wabco Gmbh | Compressed-air supply installation with reduced idling power |
US6142743A (en) * | 1998-01-28 | 2000-11-07 | Institut Francais Du Petrole | Wet gas compression device and method with evaporation of the liquid |
US6036449A (en) * | 1998-03-24 | 2000-03-14 | Cummins Engine Company, Inc. | Air compressor control |
US6019947A (en) * | 1998-06-22 | 2000-02-01 | Cavitech, Inc. | Method and apparatus for sterilization of a continuous liquid flow |
US6692234B2 (en) * | 1999-03-22 | 2004-02-17 | Water Management Systems | Pump system with vacuum source |
US6401472B2 (en) * | 1999-04-22 | 2002-06-11 | Bitzer Kuehlmaschinenbau Gmbh | Refrigerant compressor apparatus |
US6629821B1 (en) * | 1999-07-05 | 2003-10-07 | Kabushiki Kaisha Yokota Seisakusho | Pump apparatus |
US6142748A (en) * | 1999-08-18 | 2000-11-07 | Eastman Chemical Company | Degas piping for pumps |
US6428284B1 (en) * | 2000-03-16 | 2002-08-06 | Mobile Climate Control Inc. | Rotary vane compressor with economizer port for capacity control |
US20040151602A1 (en) * | 2001-07-17 | 2004-08-05 | Ivo Daniels | Screw compressor |
US20040018099A1 (en) * | 2001-08-01 | 2004-01-29 | Berger Terry A. | Converting a pump for use in supercritical fluid chromatography |
US20030039555A1 (en) * | 2001-08-11 | 2003-02-27 | Pioneer Pump Inc. | Self-priming centrifugal pump |
US20060035127A1 (en) * | 2002-06-17 | 2006-02-16 | Grasso Albert P | Coolant mixture separator assembly for use in a polymer electrolyte membrane (PEM) fuel cell power plant |
US6923007B1 (en) * | 2003-10-16 | 2005-08-02 | Daniel D. Holt | System and method of pumping liquified gas |
US20060222523A1 (en) * | 2004-12-17 | 2006-10-05 | Dominique Valentian | Compression-evaporation system for liquefied gas |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3739209A1 (en) * | 2019-05-13 | 2020-11-18 | ESAM S.p.A. | Piston compressor for medical use |
Also Published As
Publication number | Publication date |
---|---|
FR2890253A1 (en) | 2007-03-02 |
DE102005038273A1 (en) | 2007-02-08 |
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