EP3371458A1 - Trockenvakuumpumpe - Google Patents
TrockenvakuumpumpeInfo
- Publication number
- EP3371458A1 EP3371458A1 EP16790952.2A EP16790952A EP3371458A1 EP 3371458 A1 EP3371458 A1 EP 3371458A1 EP 16790952 A EP16790952 A EP 16790952A EP 3371458 A1 EP3371458 A1 EP 3371458A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- side bearing
- vacuum pump
- dry vacuum
- pump according
- pump
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000005086 pumping Methods 0.000 claims description 66
- 238000005192 partition Methods 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000010943 off-gassing Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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
- 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
- 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
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/126—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
-
- 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
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
- F04C27/009—Shaft sealings specially adapted for pumps
-
- 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
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- 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
- F04C2220/10—Vacuum
- F04C2220/12—Dry running
-
- 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
- F04C2240/00—Components
- F04C2240/50—Bearings
Definitions
- the dry vacuum pump according to the invention has a pump housing. Through the pump housing several Schöpfschreib are formed. Rotor elements are arranged in the pump chamber for conveying a pumping medium from a high-vacuum-side inlet to an outlet. At least one rotor element is arranged in each pumping chamber. Preferably, two rotor elements are arranged in at least one pump chamber, which cooperate suitably for conveying the pumping medium from the inlet to the outlet.
- the high vacuum side bearing is exposed to a pressure which is lower than in the at least one high vacuum side bearing adjacent pump chamber.
- This makes it possible to use other lubricants and thus also to use cheaper bearings, as they must meet lower requirements for high vacuum compatibility.
- the problem of outgassing of the lubricant is reduced.
- a pressure of less than 1 mbar, preferably less than 0.001 mbar and particularly preferably less than 0.0001 mbar is generated by the dry vacuum pump.
- the sealing device is preferably designed as a dry seal, that a sealing material can be used, which does not have to be additionally wetted with oil.
- a sealing material can be used, which does not have to be additionally wetted with oil.
- it is a contactless shaft seal with a very small sealing gap.
- the sealing device has at least two lip seals, wherein an intermediate chamber between the at least two lip seals is connected via a second channel to a region of the dry vacuum pump in which a pressure prevails which is higher than the pressure in the at least one pump chamber adjacent to the high vacuum side bearing , but at the same time lower than the pressure in the recess.
- a pressure prevails which is higher than the pressure in the at least one pump chamber adjacent to the high vacuum side bearing , but at the same time lower than the pressure in the recess.
- the adjustment of this pressure difference is preferably carried out stepwise over the intermediate chamber.
- a pressure of from 100 ⁇ m to 0 ⁇ m is prevailing.
- the pump housing has a parting plane extending in the longitudinal direction of the rotor shaft.
- the pump housing is formed in two parts.
- the parts of the pump housing preferably have contact surfaces through which the parting plane runs.
- the first channel and / or the second channel is formed as a groove in one of the contact surfaces.
- the course of the first and / or second channel can be formed in a simple manner.
- Figure 1 is a schematic representation of an inventive
- Dry vacuum pump cut along a parting plane of the pump housing
- a first pumping chamber 34 is in this case immediately adjacent to the high-vacuum-side bearing 32.
- the inlet is connected to the first pumping chamber 34 so that a low pressure prevails in the first pumping chamber 34.
- a sealing device 36 is arranged, which is shown in detail in Figure 2.
- the sealing device 36 has a first lip seal 38 and a second lip seal 40. These are separated by a spacer 43. Both the first lip seal 38 and the second lip seal 40 abuts against the rotor shaft 18.
- the second channel 56 it is advisable, for example, to connect the second channel 56 to a connecting channel 26 which lies in the flow direction in front of the connecting channel 26 to which the first channel 44 is connected.
- the illustrated dry vacuum pump is shown in section, wherein the sectional plane coincides with the parting plane of the pump housing 10. Shown is the lower pump housing half, which has a contact surface 58, with which the lower half of the pump housing 10 with an upper Half of the pump housing 10 is joined together.
- the first channel 44 and the second channel 56 are formed as a groove in the contact surface 58.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202015007606.8U DE202015007606U1 (de) | 2015-11-03 | 2015-11-03 | Trockenvakuumpumpe |
PCT/EP2016/076223 WO2017076803A1 (de) | 2015-11-03 | 2016-10-31 | Trockenvakuumpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3371458A1 true EP3371458A1 (de) | 2018-09-12 |
EP3371458B1 EP3371458B1 (de) | 2019-12-04 |
Family
ID=57233426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16790952.2A Active EP3371458B1 (de) | 2015-11-03 | 2016-10-31 | Trockenvakuumpumpe |
Country Status (8)
Country | Link |
---|---|
US (1) | US10851783B2 (de) |
EP (1) | EP3371458B1 (de) |
JP (1) | JP2018532943A (de) |
KR (1) | KR20180070704A (de) |
CN (1) | CN108431422B (de) |
DE (1) | DE202015007606U1 (de) |
MY (1) | MY193264A (de) |
WO (1) | WO2017076803A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3079886B1 (fr) * | 2018-04-05 | 2020-04-24 | Pfeiffer Vacuum | Pompe a vide de type seche |
FR3087504B1 (fr) * | 2018-10-17 | 2020-10-30 | Pfeiffer Vacuum | Procede de controle de la temperature d’une pompe a vide, pompe a vide et installation associees |
CN116624392B (zh) * | 2023-04-24 | 2024-05-17 | 北京通嘉宏瑞科技有限公司 | 定子、真空泵及真空泵的装配方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01108379U (de) * | 1988-01-12 | 1989-07-21 | ||
JP2001329979A (ja) * | 2000-05-24 | 2001-11-30 | Toyota Industries Corp | スクロール型圧縮機における潤滑構造 |
JP2002213464A (ja) | 2001-01-24 | 2002-07-31 | Toyota Industries Corp | 真空ポンプにおける軸封構造 |
JP2003013876A (ja) | 2001-06-29 | 2003-01-15 | Toyota Industries Corp | 真空ポンプにおける油洩れ防止構造 |
US6969242B2 (en) * | 2003-02-28 | 2005-11-29 | Carrier Corpoation | Compressor |
JP2004293377A (ja) * | 2003-03-26 | 2004-10-21 | Aisin Seiki Co Ltd | 多段式ドライポンプ |
JP2008255797A (ja) | 2007-03-30 | 2008-10-23 | Anest Iwata Corp | オイルフリーロータリコンプレッサのロータ軸シール装置 |
CN101392751B (zh) * | 2008-10-31 | 2011-10-26 | 东北大学 | 大抽速型高真空干式真空泵 |
GB0922564D0 (en) * | 2009-12-24 | 2010-02-10 | Edwards Ltd | Pump |
CN102242714A (zh) * | 2010-05-10 | 2011-11-16 | 北京朗禾科技有限公司 | 爪型干式真空泵复合密封装置 |
FR2962173B1 (fr) | 2010-06-30 | 2012-08-03 | Alcatel Lucent | Pompe a vide de type seche |
DE102010045881A1 (de) | 2010-09-17 | 2012-03-22 | Pfeiffer Vacuum Gmbh | Vakuumpumpe |
DE202012000611U1 (de) | 2012-01-21 | 2013-04-23 | Oerlikon Leybold Vacuum Gmbh | Turbomolekularpumpe |
CN103267015A (zh) * | 2013-04-03 | 2013-08-28 | 威海智德真空科技有限公司 | 热管内冷却干式螺杆真空泵 |
-
2015
- 2015-11-03 DE DE202015007606.8U patent/DE202015007606U1/de active Active
-
2016
- 2016-10-31 KR KR1020187015760A patent/KR20180070704A/ko unknown
- 2016-10-31 EP EP16790952.2A patent/EP3371458B1/de active Active
- 2016-10-31 CN CN201680063046.5A patent/CN108431422B/zh active Active
- 2016-10-31 MY MYPI2018701632A patent/MY193264A/en unknown
- 2016-10-31 US US15/771,776 patent/US10851783B2/en active Active
- 2016-10-31 WO PCT/EP2016/076223 patent/WO2017076803A1/de active Application Filing
- 2016-10-31 JP JP2018522757A patent/JP2018532943A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2018532943A (ja) | 2018-11-08 |
US20180340535A1 (en) | 2018-11-29 |
KR20180070704A (ko) | 2018-06-26 |
MY193264A (en) | 2022-09-29 |
US10851783B2 (en) | 2020-12-01 |
CN108431422A (zh) | 2018-08-21 |
EP3371458B1 (de) | 2019-12-04 |
CN108431422B (zh) | 2019-07-23 |
DE202015007606U1 (de) | 2017-02-06 |
WO2017076803A1 (de) | 2017-05-11 |
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