EP0975875B1 - Vakuumpumpsystem mit einer flüssigringpumpe - Google Patents
Vakuumpumpsystem mit einer flüssigringpumpe Download PDFInfo
- Publication number
- EP0975875B1 EP0975875B1 EP98922706A EP98922706A EP0975875B1 EP 0975875 B1 EP0975875 B1 EP 0975875B1 EP 98922706 A EP98922706 A EP 98922706A EP 98922706 A EP98922706 A EP 98922706A EP 0975875 B1 EP0975875 B1 EP 0975875B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- liquid ring
- liquid
- pumping system
- vacuum pumping
- 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.)
- Expired - Lifetime
Links
Images
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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
-
- 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
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
- F04C19/004—Details concerning the operating liquid, e.g. nature, separation, cooling, cleaning, control of the supply
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- 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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/005—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of dissimilar working principle
Definitions
- the invention relates to a vacuum pump system with a liquid ring pump for pumping gases, e.g. against Atmospheric pressure.
- Liquid ring pumps have been used for many years. They contain one in a cylindrical housing eccentrically housed rotor, the blades of which are one Liquid along the cylindrical wall of the housing Relocate and due to the eccentric rotor position Dip more or less deeply into this liquid ring. This results within the liquid ring between the blades spaces of variable volume, so that a Gas sucked into one of these rooms in the course the rotation of the rotor is compressed and finally ejected becomes.
- the object of the invention is to provide a suction system to specify a liquid ring pump in which contamination the working fluid of the pump is avoided even then if the gases to be conveyed contain substances at atmospheric pressure and the temperature of the liquid ring condense would.
- this object is achieved by that the liquid of the liquid ring pump from an inert Fluid is formed and that the liquid ring pump with a Diaphragm-type backing pump interacts and on the inlet side a suction valve that is controlled so that it can only be opened when the temperature of the liquid ring in the pump exceeded a lower limit Has.
- the liquid ring pump operated higher temperature, so that already due to the higher Temperature the risk of condensation from the liquid contaminating substances at the outlet of the liquid ring pump is reduced.
- the liquid ring pump long maintenance-free operation guaranteed.
- the inlet 1 is via a suction valve 3 and possibly a Cold trap 4 with the suction connection 5 of a liquid ring pump 6 connected.
- the liquid ring preferably consists of perfluorinated polyether.
- the pressure connection 7 of the pump leads to a via a temperature-controlled separator 8 Diaphragm pump 9, which acts as a backing pump in the system and is connected on the outlet side to outlet 2 to the atmosphere. If necessary, the diaphragm pump on the inlet and / or On the outlet side, a cold trap 10 or 11 have to remove foreign matter before releasing it into the atmosphere withhold.
- the valve 3 is controlled by a processor 12, the temperature measurement signals from a thermocouple 16 in the liquid ring the pump 6 and possibly a thermocouple 17 recycled in the separator 8.
- the processor opens 12 the valve 3 only when the liquid ring Minimum operating temperature above room temperature from e.g. Has reached 45 ° C.
- the temperature measurement in the Separator 8 can serve to prevent overheating and close valve 3 (and turn off the pumping system), when the gases entering the separator 8 an upper limit temperature of e.g. Exceed 90 ° C.
- valve 3 starts Liquid ring pump 6 to work, which quickly increases the temperature of the liquid ring rises. Is the temperature of e.g. Reached 45 ° C, then the processor 12 opens the valve 3, see above that the pumping process begins. The extracted gases are via the diaphragm pump 9 to the atmosphere-side outlet 2 promoted.
- the pressure relief valve 13 remains blocked until until the diaphragm pump is no longer able to increase the throughput to process the liquid ring pump, so that on Inlet of the diaphragm pump builds up a pressure that exceeds the limit pressure of the pressure relief valve 13 exceeds. Then briefly this valve is opened and the pressure in question is released.
- the diaphragm pump normally holds the pressure connection 7 of the liquid ring pump 6 to a negative pressure of approximately 100 mbar absolutely, so vapors that are in the pumped gas can be and at atmospheric pressure and ambient temperature would condense, remain in vapor form and into the Diaphragm pump are discharged. This also collects no toxic or aggressive substances in the liquid ring, so the lifespan and maintenance periods of the pumping system compared to known water ring pumps be extended.
- the invention is not in detail on all features of the illustrated embodiment limited. So can, for example, instead of a perfluorinated polyether other possibly even inorganic fluid can be used regarding the pumped gases and vapors in question is inert (such as long-chain silanes). You can also individual or all of the cold traps shown saved if the gases to be pumped are not foreign components contain that must be prevented by cold traps, to get into the atmosphere.
- inert such as long-chain silanes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Reciprocating Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Description
Claims (7)
- Vakuumpumpsystem mit einer Flüssigringpumpe zum Abpumpen von Gasen z.B. gegen Atmosphärendruck, wobei die Flüssigkeit der Flüssigringpumpe von einem inerten Fluid gebildet wird, dadurch gekennzeichnet, daß die Flüssigringpumpe (6) mit einer Vorpumpe (9) vom Membrantyp zusammenwirkt und einlaßseitig mit einem Saugventil (3) versehen ist, das so gesteuert wird, daß es sich erst öffnen läßt, wenn die Temperatur des Flüssigkeitsrings in der Pumpe (6) einen unteren Grenzwert überschritten hat.
- Vakuumpumpsystem nach Anspruch 1, dadurch gekennzeichnet, daß das Saugventil (3) außerdem von einem Thermoelement (17) in den geschlossenen Zustand gesteuert wird, das die Gastemperatur am Ausgang der Flüssigringpumpe (6) mißt, wenn diese Temperatur einen oberen Grenzwert überschreitet.
- Vakuumpumpsystem nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß ein temperaturgesteuerter Abscheider (8) zwischen dem Auslaß (7) der Flüssigringpumpe (6) und dem Einlaß der Membranpumpe (9) eingefügt ist.
- Vakuumpumpsystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß ein Überdruckventil (13) parallel zur Membranpumpe angeordnet ist.
- Vakuumpumpsystem nach einem der Ansprüche 3 und 4, dadurch gekennzeichnet, daß eine mit einem Drosselventil (14) versehene Leitung vom Auslaß der Membranpumpe zum Einlaß (5) der Flüssigringpumpe (6) führt.
- Vakuumpumpsystem nach Anspruch 5, dadurch gekennzeichnet, daß ein akustischer Kavitationssensor der Flüssigringpumpe (6) zugeordnet ist und auf das Drosselventil (14) einwirkt.
- Vakuumpumpsystem nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Flüssigkeit der Flüssigringpumpe (6) von perfluoriertem Polyäther gebildet wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19715480A DE19715480C2 (de) | 1997-04-14 | 1997-04-14 | Vakuumpumpsystem mit einer Flüssigringpumpe |
DE19715480 | 1997-04-14 | ||
PCT/EP1998/002174 WO1998046885A1 (de) | 1997-04-14 | 1998-04-14 | Vakuumpumpsystem mit einer flüssigringpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0975875A1 EP0975875A1 (de) | 2000-02-02 |
EP0975875B1 true EP0975875B1 (de) | 2003-02-26 |
Family
ID=7826432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98922706A Expired - Lifetime EP0975875B1 (de) | 1997-04-14 | 1998-04-14 | Vakuumpumpsystem mit einer flüssigringpumpe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0975875B1 (de) |
DE (2) | DE19715480C2 (de) |
WO (1) | WO1998046885A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020078471A1 (en) * | 2018-10-18 | 2020-04-23 | Changxin Memory Technologies, Inc. | A degassing system, a degassing tower, and a water system having the same |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19959068A1 (de) * | 1999-12-08 | 2001-06-21 | Siemens Ag | Vorrichtung und Verfahren zur (vibro-)akustischen Überwachung eines verfahrens- und/oder fertigungstechnischen Prozesses mit einem Klopfsensor |
DE10043783A1 (de) * | 2000-09-06 | 2002-03-14 | Leybold Vakuum Gmbh | Verfahren und Vorrichtung zur Regelung des Vakuums in einer Kammer |
DE102009058838A1 (de) | 2009-12-18 | 2011-06-22 | BARTEC BENKE GmbH, 21465 | Messanordnung für eine Flüssigkeit, insbesondere zur Verwendung in einer Milchannahmeanordnung, und Verfahren zum Betrieb einer Milchannahmeanordnung |
GB2571969B (en) | 2018-03-14 | 2020-10-07 | Edwards Tech Vacuum Engineering Qingdao Co Ltd | A liquid ring pump manifold with an integrated spray nozzle |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2971691A (en) * | 1955-08-16 | 1961-02-14 | Heraeus Gmbh W C | Pumping system |
DE1103514B (de) * | 1958-12-24 | 1961-03-30 | Klein Schanzlin & Becker Ag | Rotationskompressor mit Fluessigkeitsring zum Verdichten von Gasen, vorzugsweise von aggressiven Medien |
US3642384A (en) * | 1969-11-19 | 1972-02-15 | Henry Huse | Multistage vacuum pumping system |
US4050851A (en) * | 1975-11-10 | 1977-09-27 | The Nash Engineering Company | Liquid ring pumps and compressors using a ferrofluidic ring liquid |
DE2927797A1 (de) * | 1979-07-10 | 1981-02-05 | Leybold Heraeus Gmbh & Co Kg | Verdraenger-vakuumpumpe mit saugstutzenventil |
US4315717A (en) * | 1979-11-19 | 1982-02-16 | The Nash Engineering Company | Evacuation system with precondenser |
DE3204784A1 (de) * | 1982-02-11 | 1983-08-25 | Siemens AG, 1000 Berlin und 8000 München | Fluessigkeitsringvakuumpumpe mit vorgeschaltetem vorverdichter |
DE3420144A1 (de) * | 1984-05-30 | 1985-12-05 | Loewe Pumpenfabrik GmbH, 2120 Lüneburg | Regelungs- und steuerungssystem, insbes. fuer wassering-vakuumpumpen |
DE3425616A1 (de) * | 1984-07-12 | 1986-01-23 | Loewe Pumpenfabrik GmbH, 2120 Lüneburg | Anordnung zur minimierung des kuehlfluessigkeitsverbrauches insbes. bei fluessigkeitsring-vakuumpumpen o.dgl. |
DE3710782A1 (de) * | 1987-03-31 | 1988-10-20 | Vacuubrand Gmbh & Co | Verfahren und vorrichtung zum abpumpen von daempfen und/oder dampfhaltigen gemischen und/oder gas-dampf-gemischen oder dgl. medien |
-
1997
- 1997-04-14 DE DE19715480A patent/DE19715480C2/de not_active Expired - Fee Related
-
1998
- 1998-04-14 WO PCT/EP1998/002174 patent/WO1998046885A1/de active IP Right Grant
- 1998-04-14 EP EP98922706A patent/EP0975875B1/de not_active Expired - Lifetime
- 1998-04-14 DE DE59807317T patent/DE59807317D1/de not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020078471A1 (en) * | 2018-10-18 | 2020-04-23 | Changxin Memory Technologies, Inc. | A degassing system, a degassing tower, and a water system having the same |
Also Published As
Publication number | Publication date |
---|---|
WO1998046885A1 (de) | 1998-10-22 |
DE19715480A1 (de) | 1998-10-15 |
EP0975875A1 (de) | 2000-02-02 |
DE59807317D1 (de) | 2003-04-03 |
DE19715480C2 (de) | 1999-01-14 |
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