EP0972938A2 - Gasballasteinrichtung für eine mehrstufige Verdrängerpumpe - Google Patents
Gasballasteinrichtung für eine mehrstufige Verdrängerpumpe Download PDFInfo
- Publication number
- EP0972938A2 EP0972938A2 EP99112217A EP99112217A EP0972938A2 EP 0972938 A2 EP0972938 A2 EP 0972938A2 EP 99112217 A EP99112217 A EP 99112217A EP 99112217 A EP99112217 A EP 99112217A EP 0972938 A2 EP0972938 A2 EP 0972938A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- stage
- pumps
- pump
- gas ballast
- 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
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 8
- 239000012528 membrane Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 2
- 206010010774 Constipation Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
Images
Classifications
-
- 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
- F04B25/00—Multi-stage pumps
- F04B25/005—Multi-stage pumps with two cylinders
-
- 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
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
-
- 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
- F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
- F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
- F04B37/18—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use for specific elastic fluids
- F04B37/20—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use for specific elastic fluids for wet gases, e.g. wet air
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/06—Pressure in a (hydraulic) circuit
- F04B2205/061—Pressure in a (hydraulic) circuit after a throttle
-
- 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
- F04C2220/00—Application
- F04C2220/50—Pumps with means for introducing gas under pressure for ballasting
Definitions
- the invention relates to a gas ballast device for a multi-stage positive displacement pump according to the preamble of the first claim.
- Multi-stage positive displacement pumps with one inlet and one outlet valve are becoming today increasingly as backing pumps for high vacuum pumps - such as Turbomolecular pumps - used.
- high vacuum pumps such as Turbomolecular pumps - used.
- the associated backing pump must reach a pressure of approx. 1-5 mbar.
- the vapors can in during the compression process the backing pump condense and are therefore no longer pumped.
- gas ballast devices are used in rotary vane pumps used. Gas is released from the atmosphere into the Pump let in.
- Rotary vane pumps are due to the fact that the scoops with oil are sealed, in many cases not an optimal solution as backing pumps for turbomolecular pumps.
- turbomolecular pumps which as last stage - e.g. have a molecular pump in the manner of a Holweck pump, has succeeded in increasing the working range of such a pump combination Pushing to expand. This makes it possible to generate the effort of the backing vacuum according to the criteria of pump size and final pressure.
- oil-sealed vacuum pumps dry pumps - e.g. Diaphragm pumps - to be replaced. These have become special proven where oil-free vacuum is required.
- diaphragm pumps as backing pumps is particularly useful in this context if the High vacuum pump is a magnetically mounted turbomolecular pump.
- the gas to be pumped does not come along in any phase of the pumping process Lubricant in contact, and it cannot contain volatiles like those in Lubricants are mostly included, diffuse to the high vacuum side and contaminate them.
- the object of the invention is to provide a gas ballast system for multi-stage vacuum pumps - e.g. Diaphragm pumps or reciprocating pumps - to develop.
- the seal remains Vacuum chamber is obtained when the backing pump is switched off or by increasing pressure in the scooping chamber still improved. This is for interval operation sensible. By continuously pumping gas through the exhaust valve of the first Stage this valve is prevented from sticking.
- an effective gas ballast system for the Provided above forevacuum pumps in which the gas in the Intermediate vacuum space is taken in and metered in via throttling points so that no significant impairment of the pump properties and the final pressure takes place.
- the invention is illustrated by the example of a two-stage on the basis of the single figure Displacement pump, which is shown here as a reciprocating pump, explained in more detail become.
- Displacement pump which is shown here as a reciprocating pump, explained in more detail become.
- the conditions apply accordingly to diaphragm pumps.
- the illustration shows a two-stage positive displacement pump with two stages 1 and 2 shown.
- the inlet valve is 3 and the outlet valve designated with 4.
- the two stages are over the intermediate vacuum space 5 connected with each other.
- There is a first one for the gas inlet into the intermediate vacuum space Arrangement 6 is provided, which is provided with a throttle point 9.
- For A connection serves between the intermediate space 5 and the scooping space 8 Arrangement 7, which is provided with a throttle point 10.
- the gap 5 can also be connected to the suction area 12 the arrangement 7 'can be connected to the throttle point 10'.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Reciprocating Pumps (AREA)
- Non-Positive Displacement Air Blowers (AREA)
- Compressor (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims (3)
- Gasballasteinrichtung für eine mehrstufige Verdrängerpumpe, wobei die erste Stufe (1) aus einer oder mehreren parallel geschalteten Verdrängerpumpstufen besteht und mit Einlaßventil (3) und Auslaßventil (4) ausgestattet ist und mit den nachfolgenden Stufen über Zwischenvakuumräume (5) verbunden ist, dadurch gekennzeichnet, daß eine erste Anordnung (6) zum Gaseinlaß so angebracht ist, daß Gas in den Zwischenvakuumraum (5) eingelassen werden kann und daß eine zweite Anordnung (7) so angebracht ist, daß Gas aus dem Zwischenvakuumraum (5) in den Schöpfraum (8) der ersten Stufe (1) eingelassen werden kann.
- Gasballasteinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die zweite Anordnung (7') so angebracht ist, daß Gas aus dem Zwischenvakuumraum (5) anstatt in den Schöpfraum (8) der ersten Stufe in den Ansaugbereich (12) der ersten Stufe (1) eingelassen werden kann.
- Gasballasteinrichtung nach Anspruch 1 oder 2 , dadurch gekennzeichnet, daß mindestens eine der Anordnungen (6, 7) bzw. (6, 7') mit einer Drosselstelle (9, 10) bzw. (9, 10') ausgerüstet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19831123 | 1998-07-11 | ||
DE19831123A DE19831123A1 (de) | 1998-07-11 | 1998-07-11 | Gasballasteinrichtung für mehrstufige Verdrängerpumpen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0972938A2 true EP0972938A2 (de) | 2000-01-19 |
EP0972938A3 EP0972938A3 (de) | 2000-06-28 |
EP0972938B1 EP0972938B1 (de) | 2004-03-03 |
Family
ID=7873738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99112217A Expired - Lifetime EP0972938B1 (de) | 1998-07-11 | 1999-06-25 | Gasballasteinrichtung für eine mehrstufige Verdrängerpumpe |
Country Status (5)
Country | Link |
---|---|
US (1) | US6071085A (de) |
EP (1) | EP0972938B1 (de) |
JP (1) | JP4159183B2 (de) |
AT (1) | ATE261063T1 (de) |
DE (2) | DE19831123A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9921983D0 (en) * | 1999-09-16 | 1999-11-17 | Boc Group Plc | Improvements in vacuum pumps |
DE10021454C2 (de) * | 2000-05-03 | 2002-03-14 | Knf Neuberger Gmbh | Vorrichtung zum Fördern feuchter Gase |
DE10255792C5 (de) * | 2002-11-28 | 2008-12-18 | Vacuubrand Gmbh + Co Kg | Verfahren zur Steuerung einer Vakuumpumpe sowie Vakuumpumpensystem |
US7329105B2 (en) * | 2003-12-03 | 2008-02-12 | Haldex Brake Corporation | Multi-directional pump |
US7399345B2 (en) * | 2006-05-09 | 2008-07-15 | Rheodyne Llc | Capillary flow restrictor apparatus |
US20080063551A1 (en) * | 2006-09-13 | 2008-03-13 | R. Conrader Company | Head Discharging Compressor System |
JP6150477B2 (ja) * | 2012-08-16 | 2017-06-21 | 株式会社アルバック | 往復動式ポンプ |
KR20170054708A (ko) * | 2015-11-10 | 2017-05-18 | 엘지이노텍 주식회사 | 멀티 코일 무선 충전 방법 및 그를 위한 장치 및 시스템 |
US11873802B2 (en) * | 2020-05-18 | 2024-01-16 | Graco Minnesota Inc. | Pump having multi-stage gas compression |
CN112049769B (zh) * | 2020-08-11 | 2022-09-02 | 珠海格力节能环保制冷技术研究中心有限公司 | 活塞压缩机和制冷设备 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US272730A (en) * | 1883-02-20 | Thomas w | ||
US688520A (en) * | 1901-10-09 | 1901-12-10 | Ebenezer Hill | Air-compressor. |
US1724934A (en) * | 1926-12-01 | 1929-08-20 | Sulzer Ag | Compound-reciprocating compressor |
US2205793A (en) * | 1936-08-10 | 1940-06-25 | Liquid Carbonic Corp | Compressor |
US2812771A (en) * | 1953-08-31 | 1957-11-12 | Arthur E Mcfarland | Hydraulic testing equipment |
DE1865607U (de) * | 1962-08-17 | 1963-01-17 | Dieteg G M B H | Vakuumpumpe, insbesondere fuer melkmaschinen. |
US3835874A (en) * | 1967-12-22 | 1974-09-17 | F Dellasala | Method of introducing liquid doses |
CH470589A (de) * | 1968-10-11 | 1969-03-31 | Balzers Patent Beteilig Ag | Anordnung zur Evakuierung von Rezipienten |
FR2423656A1 (fr) * | 1978-04-19 | 1979-11-16 | Hunsinger Emile | Pompe a vide autoregulatrice |
DE2927797A1 (de) * | 1979-07-10 | 1981-02-05 | Leybold Heraeus Gmbh & Co Kg | Verdraenger-vakuumpumpe mit saugstutzenventil |
US4784579A (en) * | 1986-12-19 | 1988-11-15 | Allied-Signal Inc. | Hydraulic-pneumatic power transfer unit |
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 |
DE4136950A1 (de) * | 1991-11-11 | 1993-05-13 | Pfeiffer Vakuumtechnik | Mehrstufiges vakuumpumpsystem |
DE4442174A1 (de) * | 1994-11-26 | 1996-05-30 | Leybold Ag | Lecksuchgerät mit Vakuumpumpen und Betriebsverfahren dazu |
DE19524609A1 (de) * | 1995-07-06 | 1997-01-09 | Leybold Ag | Vorrichtung zum raschen Evakuieren einer Vakuumkammer |
US5547347A (en) * | 1995-09-21 | 1996-08-20 | The Boc Group, Inc. | Gas injection apparatus and method |
DE19634519A1 (de) * | 1996-08-27 | 1998-03-05 | Leybold Vakuum Gmbh | Kolbenvakuumpumpe mit Eintritt und Austritt |
US5820354A (en) * | 1996-11-08 | 1998-10-13 | Robbins & Myers, Inc. | Cascaded progressing cavity pump system |
DE19704234B4 (de) * | 1997-02-05 | 2006-05-11 | Pfeiffer Vacuum Gmbh | Verfahren und Vorrichtung zur Regelung des Saugvermögens von Vakuumpumpen |
-
1998
- 1998-07-11 DE DE19831123A patent/DE19831123A1/de not_active Withdrawn
-
1999
- 1999-06-17 JP JP17117299A patent/JP4159183B2/ja not_active Expired - Fee Related
- 1999-06-25 AT AT99112217T patent/ATE261063T1/de not_active IP Right Cessation
- 1999-06-25 DE DE59908691T patent/DE59908691D1/de not_active Expired - Lifetime
- 1999-06-25 EP EP99112217A patent/EP0972938B1/de not_active Expired - Lifetime
- 1999-07-12 US US09/351,735 patent/US6071085A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
None |
Also Published As
Publication number | Publication date |
---|---|
JP4159183B2 (ja) | 2008-10-01 |
JP2000038986A (ja) | 2000-02-08 |
ATE261063T1 (de) | 2004-03-15 |
US6071085A (en) | 2000-06-06 |
DE59908691D1 (de) | 2004-04-08 |
EP0972938A3 (de) | 2000-06-28 |
DE19831123A1 (de) | 2000-01-13 |
EP0972938B1 (de) | 2004-03-03 |
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