EP1317627A1 - Pump comprising a water supply - Google Patents
Pump comprising a water supplyInfo
- Publication number
- EP1317627A1 EP1317627A1 EP01980376A EP01980376A EP1317627A1 EP 1317627 A1 EP1317627 A1 EP 1317627A1 EP 01980376 A EP01980376 A EP 01980376A EP 01980376 A EP01980376 A EP 01980376A EP 1317627 A1 EP1317627 A1 EP 1317627A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- pump chamber
- pump according
- pressure
- pressure connection
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/19—Temperature
Definitions
- the invention relates to a pump for generating pressure and / or negative pressure, with a pump chamber which has a high-pressure connection and a low-pressure connection, and two at least two-bladed rotors which are mounted on two parallel, mutually offset shafts in the pump chamber. roll without contact as they rotate, forming cells with internal compression. Pumps of this type are also known as claw compressors.
- the resulting ner seal heat is dissipated by a cooling air flow on the outer surface of the housing provided with cooling fins or by a cooling water circuit integrated in the housing.
- the invention further develops a pump of the type specified above in such a way that at least a substantial proportion of the
- Ner seal heat is dissipated via a cooling medium introduced into the ner poet space.
- a feed of a cooling medium into the pump chamber which is regulated according to the temperature on the side of the high-pressure connection is provided.
- the temperature-dependent control of the coolant volume flow fed in reliably prevents the pump from overheating under harsh operating conditions.
- the pump according to the invention is therefore particularly suitable for use in connection with fuel cells in motor vehicles.
- Water is particularly suitable as the cooling medium.
- At least one injection nozzle for the cooling medium preferably a two-substance atomizing nozzle, is arranged in the pump chamber, which, in addition to the liquid cooling medium, is supplied with a gaseous nolumen flow which is branched off from the high-pressure connection.
- the two-component atomizer nozzle is provided with a flow regulating element, which an actuator engages.
- Figure 1 is a schematic diagram of the inventive pump with temperature-controlled water feed directly into the nerêtrraum using an adjustable two-component atomizer nozzle.
- FIG. 2 shows a schematic sectional view of a claw compressor with temperature-controlled water feed according to the basic scheme of FIG. 1;
- FIG. 3 shows a variant of the claw compressor according to FIG. 2, in which the outlet-side system pressure is used to atomize the cooling water fed in;
- Fig. 4 shows schematically in section a claw compressor with temperature-controlled water feed directly into the compressor chamber using a controllable injection pump.
- Electric motor M operated pump 12 shown which is connected on the input side to a suction line 14 and on the output side to a pressure line 16.
- a gaseous medium can be added via the suction line 14 Pressure Po and temperature To are supplied to the pump 12 and a gaseous medium with pressure P2 and temperature T2 is discharged from the pump via the pressure line 16.
- a two-substance atomizer nozzle 18 opens into the suction line 14 and can be supplied with cooling water 21 via a coolant inlet 20 and compressed air via a compressed air connection 22.
- the two-component atomizer nozzle 18 is provided with a flow regulating element which can be actuated via an actuating actuator 24.
- the amount of cooling water to be fed is determined via a control loop.
- a temperature sensor is provided in the pressure line 16, which measures the temperature T2 of the gaseous medium emerging from the pump 12.
- the measured temperature T2 is compared with a target value T s , and the temperature difference T2-T s is corrected via the flow of the liquid coolant by actuating the actuator 24.
- FIG. 2 shows the pump according to the invention from FIG. 1 in a schematic sectional view.
- the pump 12 has a housing 30 in which a pump chamber 32 is formed.
- Two double-bladed rotors 34, 36 are each mounted on a shaft 38, 40 in the pump chamber 32.
- the shafts 38, 40 are arranged in parallel and offset from one another.
- the rotors 34, 36 roll on each other in a contactless manner during a rotation and thereby form cells 42 of variable size, with an internal compression taking place.
- the heat generated during the operation of this so-called claw compressor 12 is essentially dissipated by the temperature-controlled water feed described in FIG.
- the amount of water required for cooling is sprayed directly into the pump chamber 32 via the two-substance atomizing nozzle 18.
- the claw compressor 112 shown in FIG. 3 corresponds to the claw compressor 12 shown in FIG. 2. In contrast to that in FIG. 3
- the cooling control circuit shown in FIG. 2 is branched off from the pressure line 116 here and the gaseous volume flow fed to the two-substance atomizer nozzle 118 is returned to the two-substance atomizer nozzle 118 via a line 144.
- the system pressure on the outlet side is thus used to atomize the cooling water 121 fed in.
- the cooling water 221 is fed into the pump chamber 232 of the claw Compressor 212 directly via a controllable injection pump 250.
- the amount of cooling water to be fed in by the pump is readjusted via the temperature T2 of the gaseous medium emerging from the pump chamber 232 analogously to the basic scheme of FIG.
- the liquid cooling medium is not fed directly from the controllable injection pump into the pump chamber, but is fed in via an injection nozzle connected between the pump chamber and the injection pump.
- the injection nozzle opens into the pump chamber in the region of the pressure line or that an injection nozzle opens into the pump chamber in the region of the pressure line in addition to the injection nozzle.
- the temperature-controlled feeding of the cooling water directly into the pump chamber reliably prevents the pump from overheating even under harsh operating conditions.
- the pump according to the invention has the advantage over pumps with external cooling known from the prior art that its compact design means that it requires less space. Since the heat of compression is dissipated directly at the point of its generation, namely in the pump chamber, there are only small temperature differences between the housing and the rotors compared to the pump with external cooling. As a result, the thermal expansion of the rotors that occurs during operation is minimal, so that the pump can be designed with very small gaps between the rotor and the housing. Due to the gap reduction, backflows are minimized and the efficiency is optimized.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20015744U | 2000-09-12 | ||
DE20015744U DE20015744U1 (en) | 2000-09-12 | 2000-09-12 | Pump with water feed |
PCT/EP2001/010536 WO2002023046A1 (en) | 2000-09-12 | 2001-09-12 | Pump comprising a water supply |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1317627A1 true EP1317627A1 (en) | 2003-06-11 |
EP1317627B1 EP1317627B1 (en) | 2004-10-06 |
Family
ID=7946355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01980376A Expired - Lifetime EP1317627B1 (en) | 2000-09-12 | 2001-09-12 | Pump comprising a water supply |
Country Status (9)
Country | Link |
---|---|
US (1) | US7077635B2 (en) |
EP (1) | EP1317627B1 (en) |
JP (1) | JP2004509271A (en) |
KR (1) | KR20030032018A (en) |
CN (1) | CN1252389C (en) |
AT (1) | ATE278875T1 (en) |
CA (1) | CA2421988A1 (en) |
DE (2) | DE20015744U1 (en) |
WO (1) | WO2002023046A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE0202111D0 (en) * | 2002-07-05 | 2002-07-05 | Delaval Holding Ab | An arrangement and a method for the treatment of a vacuum pump |
DE10258363A1 (en) * | 2002-12-12 | 2004-06-24 | Daimlerchrysler Ag | Device for supplying air to fuel cells has claw compressor with at least two mutually engaged compressor wheels, claw expansion device with at least two mutually engaged expansion device wheels |
US7375719B2 (en) | 2003-12-29 | 2008-05-20 | Lg. Philips Lcd. Co., Ltd | Method and apparatus for driving liquid crystal display |
DE102008030788A1 (en) * | 2008-06-28 | 2009-12-31 | Oerlikon Leybold Vacuum Gmbh | Method for cleaning vacuum pumps |
DE102009017887A1 (en) * | 2009-04-17 | 2010-10-21 | Oerlikon Leybold Vacuum Gmbh | Coarse pumping process for a positive displacement pump |
DE102009043133B4 (en) * | 2009-09-23 | 2012-08-09 | Roth & Rau Ag | Device and method for cleaning a pump chamber of a vacuum pump |
JP5765862B2 (en) * | 2013-08-30 | 2015-08-19 | 株式会社アンレット | Low pressure steam recycling equipment |
CN104632630B (en) * | 2013-11-13 | 2017-01-11 | 中国科学院沈阳科学仪器股份有限公司 | System and method for controlling thermal expansion of Roots dry pump |
CN105443391A (en) * | 2015-12-26 | 2016-03-30 | 广州市心德实业有限公司 | Anti-corrosion device for alleviating corrosion of Roots compressor |
GB2557681A (en) * | 2016-12-15 | 2018-06-27 | Edwards Ltd | A claw pump and method of operation |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2906448A (en) * | 1954-10-28 | 1959-09-29 | W C Heraus G M B H | Roots type vacuum pumps |
GB1172993A (en) | 1966-02-23 | 1969-12-03 | Plessey Co Ltd | Improvements in or relating to Rotary-Positive Displacement Machines |
US3759348A (en) * | 1971-11-08 | 1973-09-18 | Maekawa Seisakusho Kk | Method of compressing chlorine gas |
US3795117A (en) * | 1972-09-01 | 1974-03-05 | Dunham Bush Inc | Injection cooling of screw compressors |
FR2401338B1 (en) * | 1977-06-17 | 1980-03-14 | Cit Alcatel | |
DE3427117A1 (en) * | 1984-07-23 | 1986-02-20 | Aerzener Maschinenfabrik Gmbh, 3251 Aerzen | METHOD FOR COOLING A SCREW COMPRESSOR AND SCREW COMPRESSOR FOR CARRYING OUT THE METHOD |
JPS6368793A (en) * | 1986-09-10 | 1988-03-28 | Mazda Motor Corp | Supercharger for engine |
US4861246A (en) * | 1988-01-07 | 1989-08-29 | Bernard Zimmern | Injected compressor with liquid switch |
DE59402988D1 (en) * | 1993-08-11 | 1997-07-10 | Siemens Ag | Mechanical compressor system |
DE4447097A1 (en) * | 1994-12-29 | 1996-07-04 | Guenter Kirsten | Compressor system |
DE19806346C2 (en) | 1998-02-12 | 2000-05-18 | Gardner Denver Wittig Gmbh | Device for cooling and shaft sealing of a compressor |
JP2000291579A (en) * | 1998-10-16 | 2000-10-17 | Toyota Autom Loom Works Ltd | Water-cooled type gas feeding device |
DE10153459B9 (en) * | 2001-10-30 | 2004-09-09 | Kaeser Kompressoren Gmbh | Arrangement for controlling the flow of cooling fluid in compressors |
-
2000
- 2000-09-12 DE DE20015744U patent/DE20015744U1/en not_active Expired - Lifetime
-
2001
- 2001-09-12 WO PCT/EP2001/010536 patent/WO2002023046A1/en active IP Right Grant
- 2001-09-12 AT AT01980376T patent/ATE278875T1/en not_active IP Right Cessation
- 2001-09-12 US US10/363,130 patent/US7077635B2/en not_active Expired - Fee Related
- 2001-09-12 DE DE50104032T patent/DE50104032D1/en not_active Expired - Fee Related
- 2001-09-12 CA CA002421988A patent/CA2421988A1/en not_active Abandoned
- 2001-09-12 JP JP2002527662A patent/JP2004509271A/en active Pending
- 2001-09-12 KR KR10-2003-7003507A patent/KR20030032018A/en not_active Application Discontinuation
- 2001-09-12 EP EP01980376A patent/EP1317627B1/en not_active Expired - Lifetime
- 2001-09-12 CN CNB018155243A patent/CN1252389C/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0223046A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE278875T1 (en) | 2004-10-15 |
CN1455849A (en) | 2003-11-12 |
CN1252389C (en) | 2006-04-19 |
DE50104032D1 (en) | 2004-11-11 |
EP1317627B1 (en) | 2004-10-06 |
JP2004509271A (en) | 2004-03-25 |
KR20030032018A (en) | 2003-04-23 |
US20040037727A1 (en) | 2004-02-26 |
DE20015744U1 (en) | 2001-01-25 |
WO2002023046A1 (en) | 2002-03-21 |
CA2421988A1 (en) | 2003-03-11 |
US7077635B2 (en) | 2006-07-18 |
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