EP0347706B1 - Dispositif de pompe à vide multiétagé - Google Patents
Dispositif de pompe à vide multiétagé Download PDFInfo
- Publication number
- EP0347706B1 EP0347706B1 EP89110607A EP89110607A EP0347706B1 EP 0347706 B1 EP0347706 B1 EP 0347706B1 EP 89110607 A EP89110607 A EP 89110607A EP 89110607 A EP89110607 A EP 89110607A EP 0347706 B1 EP0347706 B1 EP 0347706B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- gas ring
- unit according
- ring pump
- oil
- 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
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 23
- 239000002826 coolant Substances 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
-
- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
-
- 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
-
- 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
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
- F04D17/168—Pumps specially adapted to produce a vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D23/00—Other rotary non-positive-displacement pumps
- F04D23/008—Regenerative pumps
Definitions
- the invention relates to a multi-stage vacuum pump unit in which an oil-lubricated or dry-running mechanical displacement pump is provided in the last, atmospheric stage and this is preceded by at least one further pump on the vacuum side.
- Roots pumps are characterized by an outstanding efficiency due to the contact-free rotation of their Roots compared to other mechanical vacuum pumps.
- an overall efficiency can be improved by connecting a Roots pump.
- Roots pump of less than 50 mbar The many narrow gaps of this pump do not allow larger pressure differences, because the greater heating associated with higher pressure differences causes thermal expansions which, due to the narrow gaps, can easily cause the roots to jam.
- US Pat. No. 4,090,815 discloses a high-vacuum unit which consists of a molecular pump and an oil-sealed rotary pump.
- Oil-sealed rotary pumps are used in vacuum technology for the pressure range from 1013 mb (760 Torr) to a maximum of 10 ⁇ 4 mbar (approx. 10 ⁇ 4 Torr) and are not able to generate a high vacuum.
- a molecular pump is therefore connected upstream of the oil-sealed rotary pump in order to generate a high vacuum.
- Molecular pumps work on the principle of pulse transmission on solid surfaces.
- the molecular pump according to US-A-4 090 815 has a rotating, circular disk which is rotatably mounted in a two-part housing.
- Each housing part is provided with a spiral conveyor groove, the cross section of which tapers in the direction of increasing pressure, i.e. increasing molecular density.
- Each conveyor groove forms a working channel together with the disc.
- the rotating disc forms the moving wall of the working channel on which the molecules hit. Due to the rotation of the disk, the isotropic velocity distribution of the individual gas molecules (corresponding to the wall temperature) is superimposed on a drift velocity. This leads to a flow and thus to a pumping action.
- a vacuum pump unit in which a side-channel compressor is connected upstream of a liquid ring vacuum pump in order to reduce the negative influence of the steam pressure of the process water and the associated underperformance in the suction pressure range between approximately 20 and approximately 60 mb to compensate for the liquid ring vacuum pump. Without the connection of a side channel compressor, a liquid ring vacuum pump in the pressure range below 40 mb would no longer be operational.
- the invention has for its object to develop a multi-stage vacuum pump unit of the type described in such a way that on the one hand the oil consumption and thus the contaminated amount of oil is significantly reduced and on the other hand the efficiency compared to known multi-stage vacuum pump units is still improved.
- the upstream pump is a gas ring pump.
- the efficiency of a gas ring pump is only half as high as the efficiency of a Roots pump, tests have shown that the use of a gas ring pump in a multi-stage vacuum pump unit can significantly reduce both the energy requirement and the cost, with no losses in terms of the operational safety of the unit must be accepted.
- gas ring pumps work oil-free in the compressor chamber, the amount of oil otherwise required when using a mechanical displacement pump is completely eliminated. Because of the higher pressure ratio that can be achieved with a gas ring pump, the size of the downstream positive displacement pump is reduced. Smaller sizes of these pumps also require smaller amounts of lubricating oil, and the power requirement also decreases.
- Appropriate cooling of the medium compressed by the gas ring pump or the gas ring pump itself also contributes to reducing the amount of lubricating oil.
- a further, very effective cooling of the gas ring pump is achieved in that cooling ducts for jacket cooling are provided on its housing and these cooling ducts are connected to a coolant circuit. Because the gas ring pump is connected to the coolant circuit of the rotary vane pump, a single cooler or heat exchanger for the unit is sufficient.
- the speed of each pump can be optimally adapted to the prevailing operating conditions. If only one drive motor is used for both pumps, the different speeds that may be necessary for an optimal adaptation of both pumps can be achieved in that one of the two pumps is coupled to the drive motor directly and the other is coupled to the drive motor via a belt drive or a gear.
- a gas ring pump 2 driven by its own electric motor 1 has an intake pipe 3, via which the gas ring pump 2 is connected to a container (not shown in the drawing) to be evacuated. With its outlet 4, the gas ring pump 2 is connected via a connecting pipe 5 to the inlet opening 6 of a rotary vane pump 7. Through this rotary vane pump 7, the medium pre-compressed by the gas ring pump 2 is further compressed and expelled through the outlet opening 8.
- the size of the rotary vane pump, which compresses to atmosphere can be selected to be considerably smaller as a result of the precompression by the gas ring pump, as a result of which the amount of lubricating oil produced is significantly reduced compared to a multi-stage vacuum pump unit consisting only of rotary vane pumps. Since the gas ring pump 2 works completely oil-free in the compression chamber, the amount of oil otherwise required for the preliminary stage is also eliminated. In addition, a gas ring pump with only one shaft and without gear can be inexpensively built in multiple stages, so that a large pressure difference, i.e. high pre-compression, can be achieved.
- a gas ring pump is considerably less sensitive due to the fact that the gap is two to three times larger than Roots pumps, whereby the gap losses are not higher or even lower due to the division into several stages. Furthermore, due to its mode of operation (freely rotating impeller), the gas ring pump is only limited in the permissible speed by the type of material used for the impeller. With a multi-stage version of the gas ring pump, particularly good and intensive cooling can be achieved due to the larger surface area compared to a Roots pump, which contributes to an improvement in efficiency.
- Injection cooling is another advantageous cooling option.
- a coolant is injected into the gas ring pump 2.
- the cooling of the volume of the medium to be compressed, which can be handled by the downstream rotary vane pump 7, is reduced, so that the downstream rotary vane pump 7 can be designed correspondingly smaller.
- a very intensive cooling of the medium to be compressed is achieved by jacket cooling of the gas ring pump 2.
- cooling channels 10 are formed on the housing of the gas ring pump 2, through which a cooling liquid flows.
- the cooling ducts 10 of the gas ring pump 2 are connected via pipes 12 to a cooling jacket 11 of the rotary vane pump 7 which also has the cooling liquid flowing through it.
- the cooling ducts 10 of the gas ring pump 2 are connected to one connection of a cooler 13 and the cooling jacket 11 of the rotary vane pump 7 to the other connection of the cooler 13 via further pipelines 12a and 12b.
- the cooler 13 has a fan 15 which is driven by an electric motor 14.
- a circulation pump 16 can be arranged in the course of the pipes 12a or 12b.
- a series connection of the coolant circuits of the two pumps 2 and 7 is shown.
- a parallel connection of these cooling circuits is also possible.
- a cooler for the two pumps 2 and 7 is sufficient, so that the construction work is kept to a minimum.
- the intermediate cooler 9 can be dispensed with in case of jacket cooling of the gas ring pump 2.
- a reduction in the cost of materials is also possible in that the rotary vane pump 7 is connected directly to the outlet of the gas ring pump 2 with its inlet opening 6. This also results in a compact design of the compressor unit.
- each of the two pumps 2 and 7 with its own drive motor offers the possibility of optimal power control, since each pump can be regulated in its speed so that optimal conditions arise.
- optimal operation is ensured by regulating the speed of the electric motor 1 assigned to it so that the current consumption remains constant over the entire speed range.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Non-Positive Displacement Air Blowers (AREA)
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89110607T ATE75007T1 (de) | 1988-06-24 | 1989-06-12 | Mehrstufiges vakuumpumpenaggregat. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3821437 | 1988-06-24 | ||
DE3821437 | 1988-06-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0347706A1 EP0347706A1 (fr) | 1989-12-27 |
EP0347706B1 true EP0347706B1 (fr) | 1992-04-15 |
Family
ID=6357218
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89110607A Expired - Lifetime EP0347706B1 (fr) | 1988-06-24 | 1989-06-12 | Dispositif de pompe à vide multiétagé |
EP89907120A Pending EP0420899A1 (fr) | 1988-06-24 | 1989-06-12 | Agregat de pompe a vide a plusieurs etages |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89907120A Pending EP0420899A1 (fr) | 1988-06-24 | 1989-06-12 | Agregat de pompe a vide a plusieurs etages |
Country Status (7)
Country | Link |
---|---|
US (1) | US5244352A (fr) |
EP (2) | EP0347706B1 (fr) |
JP (1) | JPH0545827Y2 (fr) |
AT (1) | ATE75007T1 (fr) |
DE (1) | DE58901145D1 (fr) |
ES (1) | ES2030561T3 (fr) |
WO (1) | WO1989012751A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004010061B3 (de) * | 2004-03-02 | 2005-10-13 | Friedhelm Gevelhoff | Seitenkanal-Drehschieberpumpe |
DE102004038924A1 (de) * | 2004-03-02 | 2006-03-02 | Friedhelm Gevelhoff | Seitenkanal-Drehschieberpumpe |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3386202B2 (ja) * | 1993-09-08 | 2003-03-17 | 株式会社アルバック | 2段式油回転真空ポンプ |
DK9300484U4 (da) * | 1993-11-02 | 1994-07-22 | Apv Rosista | Hygiejnisk tankvognspumpe samt tankvogn forsynet med en sådan |
DE19500823A1 (de) * | 1995-01-13 | 1996-07-18 | Sgi Prozess Technik Gmbh | Vakuum-Pumpstand |
DE19710098A1 (de) * | 1997-03-12 | 1998-09-17 | Paul Stehning Gmbh | Verfahren zur Erzeugung von PET-Recyclat aus Flakes, sowie nach dem Verfahren erzeugtes PET-Produkt |
US6692234B2 (en) * | 1999-03-22 | 2004-02-17 | Water Management Systems | Pump system with vacuum source |
DE19929519A1 (de) | 1999-06-28 | 2001-01-04 | Pfeiffer Vacuum Gmbh | Verfahren zum Betrieb einer Mehrkammer-Vakuumanlage |
US7033137B2 (en) | 2004-03-19 | 2006-04-25 | Ametek, Inc. | Vortex blower having helmholtz resonators and a baffle assembly |
US20090142212A1 (en) * | 2007-12-03 | 2009-06-04 | Paul Xiubao Huang | Rotary blower with noise abatement jacket enclosure |
FR2978214B1 (fr) * | 2011-07-21 | 2013-08-16 | Adixen Vacuum Products | Pompe a vide multi-etagee de type seche |
DE202012008133U1 (de) * | 2012-08-25 | 2013-11-27 | Oerlikon Leybold Vacuum Gmbh | Vakuumpumpe |
CN105756936A (zh) * | 2016-04-29 | 2016-07-13 | 东莞市佛尔盛智能机电股份有限公司 | 一种气环式真空泵 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3545982A1 (de) * | 1985-12-23 | 1987-07-02 | Busch Gmbh K | Drehschieber-vakuumpumpe |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE414133C (de) * | 1922-07-05 | 1925-05-23 | Der Maschinenfabriken Escher A | Mehrstufige Kreiselverdichteranlage |
US2936107A (en) * | 1956-06-14 | 1960-05-10 | Nat Res Corp | High vacuum device |
GB1248031A (en) * | 1967-09-21 | 1971-09-29 | Edwards High Vacuum Int Ltd | Two-stage rotary vacuum pumps |
US3642384A (en) * | 1969-11-19 | 1972-02-15 | Henry Huse | Multistage vacuum pumping system |
DE2138383A1 (de) * | 1971-07-31 | 1973-02-08 | Siemens Ag | Pumpenaggregat zur mehrstufigen verdichtung von gasen |
US3922110A (en) * | 1974-01-28 | 1975-11-25 | Henry Huse | Multi-stage vacuum pump |
DE2430314C3 (de) * | 1974-06-24 | 1982-11-25 | Siemens AG, 1000 Berlin und 8000 München | Flüssigkeitsring-Vakuumpumpe mit vorgeschaltetem Verdichter |
US3956072A (en) * | 1975-08-21 | 1976-05-11 | Atlantic Fluidics, Inc. | Vapor distillation apparatus with two disparate compressors |
JPS5267810A (en) * | 1975-12-03 | 1977-06-04 | Aisin Seiki Co Ltd | High vacuum pump |
DE2614176A1 (de) * | 1976-04-02 | 1977-10-13 | Gutehoffnungshuette Sterkrade | Mehrstufiger kompressor |
DE2841906C2 (de) * | 1978-09-26 | 1980-02-21 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Flüssigkeitsringverdichter oder -vakuumpumpe |
US4588358A (en) | 1984-07-02 | 1986-05-13 | Werner Rietschle Maschinen-Und Apparatebau Gmbh | Rotary vane evacuating pump |
JPS62119946A (ja) * | 1985-11-19 | 1987-06-01 | Mitsubishi Cable Ind Ltd | ヒ−トシンクの製造方法 |
JPH0733834B2 (ja) * | 1986-12-18 | 1995-04-12 | 株式会社宇野澤組鐵工所 | ロータ内蔵ハウジングの外周温度が安定化された内部分流逆流冷却多段式の三葉式真空ポンプ |
US5020969A (en) * | 1988-09-28 | 1991-06-04 | Hitachi, Ltd. | Turbo vacuum pump |
FR2647853A1 (fr) * | 1989-06-05 | 1990-12-07 | Cit Alcatel | Pompe primaire seche a deux etages |
US5131817A (en) * | 1990-03-22 | 1992-07-21 | The Nash Engineering Company | Two-stage pumping system |
-
1989
- 1989-06-12 WO PCT/EP1989/000659 patent/WO1989012751A1/fr not_active Application Discontinuation
- 1989-06-12 US US07/635,148 patent/US5244352A/en not_active Expired - Fee Related
- 1989-06-12 AT AT89110607T patent/ATE75007T1/de not_active IP Right Cessation
- 1989-06-12 DE DE8989110607T patent/DE58901145D1/de not_active Expired - Fee Related
- 1989-06-12 EP EP89110607A patent/EP0347706B1/fr not_active Expired - Lifetime
- 1989-06-12 JP JP1991600004U patent/JPH0545827Y2/ja not_active Expired - Lifetime
- 1989-06-12 EP EP89907120A patent/EP0420899A1/fr active Pending
- 1989-06-12 ES ES198989110607T patent/ES2030561T3/es not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3545982A1 (de) * | 1985-12-23 | 1987-07-02 | Busch Gmbh K | Drehschieber-vakuumpumpe |
Non-Patent Citations (1)
Title |
---|
"Auswahlkriterien für Pumpen zum Erzeugen von Vakuum", Maschinenmarkt, Würzburg 88(1982), S. 286-289 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004010061B3 (de) * | 2004-03-02 | 2005-10-13 | Friedhelm Gevelhoff | Seitenkanal-Drehschieberpumpe |
DE102004010061B9 (de) * | 2004-03-02 | 2006-02-16 | Friedhelm Gevelhoff | Seitenkanal-Drehschieberpumpe |
DE102004038924A1 (de) * | 2004-03-02 | 2006-03-02 | Friedhelm Gevelhoff | Seitenkanal-Drehschieberpumpe |
DE102004038924B4 (de) * | 2004-03-02 | 2007-03-01 | Friedhelm Gevelhoff | Seitenkanal-Drehschieberpumpe |
Also Published As
Publication number | Publication date |
---|---|
EP0420899A1 (fr) | 1991-04-10 |
WO1989012751A1 (fr) | 1989-12-28 |
JPH0545827Y2 (fr) | 1993-11-26 |
ES2030561T3 (es) | 1992-11-01 |
ATE75007T1 (de) | 1992-05-15 |
DE58901145D1 (de) | 1992-05-21 |
US5244352A (en) | 1993-09-14 |
EP0347706A1 (fr) | 1989-12-27 |
JPH03500007U (fr) | 1991-12-05 |
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