EP1119710B1 - Reibungsvakuumpumpe - Google Patents
Reibungsvakuumpumpe Download PDFInfo
- Publication number
- EP1119710B1 EP1119710B1 EP99938360A EP99938360A EP1119710B1 EP 1119710 B1 EP1119710 B1 EP 1119710B1 EP 99938360 A EP99938360 A EP 99938360A EP 99938360 A EP99938360 A EP 99938360A EP 1119710 B1 EP1119710 B1 EP 1119710B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- stator
- pump according
- unit
- housing
- 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
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
-
- 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
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
- F04D19/044—Holweck-type pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/668—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps damping or preventing mechanical vibrations
Definitions
- the invention relates to a friction vacuum pump, which has a stator, a rotor and a housing and with which during their operation a tight
- the gap between the stator and rotor must be observed got to.
- the characteristics of this type of machine depend largely depends on the size of the gap between the stator and rotor off.
- Machines of the type concerned here are built usually such that the rotor to avoid of vibration transmissions from the stator elastic is decoupled. It is customary to use elastomer rings for the bearings supported in the housing. From DE-U-80 27 697 (see also FR-A-2 310 481) is known, the rotor with a spindle bearing equip and this overall via O-rings in Support the housing. In constructions of this type a minimal gap between stator and rotor of some Tenths of a millimeter should not be undershot because the elastomers used the technical limit to Set narrowing of the column.
- the present invention is based on the object to design a machine of the type concerned here in such a way that they have narrower gaps between stator and rotor can be operated as before.
- stator and rotor are coupled to one another in terms of vibration and that consists of the stator and rotor System together via vibrating elements in the housing is supported.
- "Coupled with each other in terms of vibration technology” is supposed to mean that rotor unit and stator unit execute essentially identical vibrations, so the size of the column between the stator and Rotor components much smaller than previously executed can be.
- the common vibrations of the systems consisting of rotor and stator are used by Vibrating elements added, over which this system supported in the housing.
- a rigid coupling of the rotor is particularly advantageous and stator.
- the pumps 1 according to FIGS. 1 and 2 each exist of an outer housing 2 and one located therein Rotor / stator system 3, which is based on vibrating elements 4, 5 is supported in the housing 2.
- the housing 2 carries On the suction side the connection flange 6 and one on the pressure side Connection cover 7.
- the rotor-stator system 3 comprises the rotor unit 8 and the stator unit 9.
- the central shaft is part of the rotor unit 8 11, the suction side of the substantially bell-shaped designed rotor 12 carries.
- the shaft is on the pressure side 11 equipped with the motor rotors 13 of the drive motor.
- the stator of the drive motor is designated 14. It is supported in the housing 2.
- Components of the stator unit 9 are three sleeve components 15, 16, 17, one of which (15) on the pressure side, the the other two (16, 17) on the suction side (inside and outside the wall 18 of the bell-shaped rotor 12) are arranged.
- the pressure side end of the sleeve 15 is equipped with an inward edge 21, the inside as a sliding fit 22 for the pressure side Shaft bearing 23 is formed.
- the edge 21 is equipped with a receptacle for an O-ring 24 equipped with an elastomeric material.
- a corresponding one Recording is on the connection cover 7 of the housing 2 provided.
- the recordings are designed such that the O-ring 24 next to the Function of sealing the function of a first, pressure side located vibrating element 5, about the supports the rotor-stator system 3 in the housing 2.
- Other oscillating elements can also be used in place of the O-ring 23 (e.g. Simmerrings, flat rings, piston seals) be provided.
- the connecting flange 6 is on the suction side with an inward directed stage 31 for the inclusion of another O-ring 32 or another vibrating element. There is a recording corresponding to this recording itself in the area of the end face of the sleeve 16.
- the O-ring 32 forms the second in addition to the sealing function Vibrating element 4, over which the rotor-stator system 3 supported in the housing 2.
- the housing 2 forms a Adapter sleeve together with cover 7 and connection flange 6 clamps the rotor-stator system 3. With appropriate Housing 2 and connection flange can be dimensioned 6 can also be in one piece. additionally the sleeve 16 is supported on a step-like extension 29 in the sleeve 15.
- the suction end of the inner sleeve 16 is with a equipped inward edge 34, the inside a sliding fit 35 for the suction side Shaft bearing 36 forms. Furthermore is in this Area an annular spring 37, the necessary bearing contact forces generated.
- the rotor unit 8 and the stator unit 9 via the bearings 23, 36 and Sliding fits 22, 35 rigidly coupled together. This will reduce the game size you want between Stator and rotor reached.
- the rotor-stator system 3 is supported in the housing 2 from.
- the design of the vibrating elements as O-rings has the advantage of being a sealing function at the same time can take over. They ensure a vacuum tight Separation of the delivery rooms located in the inner housing and the atmosphere. Appropriately surrounds another O-ring 38 the outer periphery of the rim 28 which is the inner Sleeve 16 carries, so that in the area of the union nut 27 vacuum tightness is guaranteed.
- the Stator unit 9 practically forms a second inner one Casing. It is vacuum tight, so the outer casing 2 can be equipped with louvers 39.
- the embodiment of Figure 1 is a single flow Turbomolecular vacuum pump with one from the suction side to the pressure side tapering delivery chamber 40 is formed.
- the outer sleeve 17 carries on its inside Stator blade rows 42, the outside of the rotor wall 18 rows of rotor blades 41.
- the path of the extracted gases is indicated by arrows 43.
- You step through the connecting flange 6 in the with the blades 41, 42nd equipped conveying space and get through openings 44 in the inner sleeve 16 along the shaft 11 and through openings 45 in the edge 21 to the outlet opening 46.
- the embodiment of Figure 2 is a three-stage Molecular pump.
- the inside of the sleeve 17 and the outside of the sleeve 16 are each in the amount of Wall 18 of the rotor 12 equipped with a thread 47, 48, which together with the cylindrical rotor wall 18 effect the desired gas production in two stages.
- the outside of the shaft 11, which is in the range of Sleeve 16 has an enlarged diameter, is with equipped with a thread 49 and forms together with the inside of the sleeve 16, the third pump stage.
- the path of the extracted gases is indicated by arrows 51. They come in through the connecting flange 6 the outer pump stage. This pump stage is useful a filling stage consisting of a blade ring 52 upstream.
- FIG. 2 can in simpler Modified to a single-stage friction vacuum pump become. Without sleeve 17, rotor bell 18 and union nut 27 only the third pump stage would be present and effective. The edges 26 and 28 as well as the thread 48 could be omitted. Another requirement would be that the diameter of the vibrating and sealing element 4,32 and the end face of the sleeve 16 each other correspond so that the rotor-stator system 3 elastic can be supported in the housing 2.7.
- stator 9 and rotor unit 8 rigid in terms of vibration coupled with each other (sliding fits 35, 22).
- At the Embodiment according to Figure 2 is between the upper bearing 36 and the inside of the rim 34 in the O-ring 63 with a compared to the diameter of the O-rings 24.32 much smaller diameter.
- This o-ring 63 only serves to bridge the fit game. A major influence on the choice of The O-ring has gaps between the rotor and stator units 63 not.
- the implementation of the invention is for small turbomolecular pumps of particular advantage. As it gets smaller The damaging part of the backflow takes up the size based on the gas flow to and thereby disproportionately worsens the vacuum technology Characteristics of a pump. By the invention Reduction of the gap between the rotor and Stator with the present new concept can be significantly improve the vacuum data. The conversely means that this creates a pump in this size still with economically reasonable effort can produce. The fact also contributes to this at that the pump is made from relatively few parts can be.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Non-Positive Displacement Air Blowers (AREA)
Description
- Figur 1 einen Schnitt durch eine Turbomolekularvakuumpumpe nach der Erfindung und
- Figur 2 einen Schnitt durch eine Molekularvakuumpumpe.
Claims (14)
- Reibungsvakuumpumpe, die eine Statoreinheit (9), eine Rotoreinheit (12) und ein Gehäuse (2, 7) aufweist und bei der während ihres Betriebes ein enger Spalt zwischen Stator und Rotor eingehalten werden soll, dadurch gekennzeichnet, dass Stator (9) und Rotor (8) schwingungstechnisch miteinander gekoppelt sind und dass das aus Statoreinheit (9) und Rotoreinheit (8) bestehende System (3) gemeinsam über Schwingelemente (4, 5) im Gehäuse (2, 7) gehaltert ist.
- Pumpe nach Anspruch 1, dadurch gekennzeichnet, dass mechanische Lager (23, 36) vorgesehen sind und dass Rotor und Stator über die mechanischen Lager miteinander gekoppelt sind.
- Pumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass Stator (9) und Rotor (8) schwingungstechnisch starr miteinander gekoppelt sind.
- Pumpe nach Anspruch 3, dadurch gekennzeichnet, dass zwischen Rotoreinheit (8) und Lager (23, 36) und/oder Lager (23, 36) und Statoreinheit (9) eine axiale Schiebepassung (22, 35) vorgesehen ist.
- Pumpe nach Anspruch 2, dadurch gekennzeichnet, dass sich zwischen einem der Lager und der Statoreinheit ein der Überbrückung eines Passungsspieles dienender O-Ring (63) befindet.
- Pumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet dass das Gehäuse (2) eine Spannhülse bildet, die zusammen mit einem stirnseitigen Deckel (7) das Rotor-Stator-System (3) verspannt.
- Pumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass Bestandteile der Rotoreinheit (8) eine zentrale Welle (11) sowie ein Rotor (12) sind und dass sich die Rotoreinheit (8) über die Lager (23, 36) in der Statoreinheit (9) abstützt.
- Pumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass Bestandteile der Statoreinheit (9) Hülsen (15, 16, 17) sowie Aufnahmen für Schwingelemente (4, 5, 24, 32) sind, über die sich das Rotor-Stator-System (3) im Gehäuse (2, 7) abstützt.
- Pumpe nach Anspruch 8, dadurch gekennzeichnet, dass die Statoreinheit (9) ein zweites inneres Gehäuse bildet.
- Pumpe nach Anspruch 9, dadurch gekennzeichnet, dass das innere Gehäuse vakuumdicht ist und dass das äußere Gehäuse (2) mit Luftschlitzen (39) ausgerüstet ist.
- Pumpe nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass ihr Rotor (12) glockenförmig ausgebildet ist und dass drei Pumpstufen vorhanden sind.
- Pumpe nach Anspruch 11, dadurch gekennzeichnet, dass der Stator (9) drei Hülsen (15, 16, 17) umfasst, von denen eine druckseitig und zwei saugseitig angeordnet sind, und zwar je eine außerhalb und innerhalb der Rotorwand (18).
- Pumpe nach Anspruch 12, dadurch gekennzeichnet, dass die druckseitige (15) und die innere saugseitige Hülse (16) mit äußeren Rändern (26, 28) ausgerüstet sind, die mit Hilfe einer auf die Druckseite der äußeren Hülse anschraubbaren Überwurfmutter (27) miteinander verspannt sind.
- Pumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Rotor (12) stirnseitig mit einer Füllstufe (52) ausgerüstet ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19846189 | 1998-10-07 | ||
DE19846189A DE19846189A1 (de) | 1998-10-07 | 1998-10-07 | Reibungsvakuumpumpe |
PCT/EP1999/005395 WO2000020763A1 (de) | 1998-10-07 | 1999-07-28 | Reibungsvakuumpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1119710A1 EP1119710A1 (de) | 2001-08-01 |
EP1119710B1 true EP1119710B1 (de) | 2002-09-04 |
Family
ID=7883695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99938360A Expired - Lifetime EP1119710B1 (de) | 1998-10-07 | 1999-07-28 | Reibungsvakuumpumpe |
Country Status (5)
Country | Link |
---|---|
US (1) | US6641376B1 (de) |
EP (1) | EP1119710B1 (de) |
JP (1) | JP2002526721A (de) |
DE (2) | DE19846189A1 (de) |
WO (1) | WO2000020763A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004050743A1 (de) * | 2004-10-19 | 2006-04-20 | Pfeiffer Vacuum Gmbh | Vibrationsarme Vakuumpumpe |
US7550881B1 (en) | 2006-01-17 | 2009-06-23 | Honeywell International Inc. | Vibration damper for generator or motor stator |
GB0618745D0 (en) * | 2006-09-22 | 2006-11-01 | Boc Group Plc | Molecular drag pumping mechanism |
EP2088327B1 (de) * | 2008-02-11 | 2011-08-31 | Agilent Technologies Italia S.p.A. | Stütze für Wälzlager |
DE102013214662A1 (de) * | 2013-07-26 | 2015-01-29 | Pfeiffer Vacuum Gmbh | Vakuumpumpe |
GB2588146A (en) * | 2019-10-09 | 2021-04-21 | Edwards Ltd | Vacuum pump |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2215473C3 (de) * | 1972-03-29 | 1980-12-18 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Eigenschwingungsgedämpfter, geräuscharmer Radiallüfter |
IT1032818B (it) * | 1975-05-06 | 1979-06-20 | Rava E | Perfezionamento alle pompe turbomo lecolari |
DE8027697U1 (de) * | 1980-10-17 | 1982-04-01 | Leybold-Heraeus GmbH, 5000 Köln | Turbomolekular-vakuumpumpe |
DE3039196A1 (de) * | 1980-10-17 | 1982-05-13 | Leybold-Heraeus GmbH, 5000 Köln | Verfahren zur montage einer einflutigen turbomolekular-vakuumpumpe und nach diesem verfahren montierte turbomolekular-vakuumpumpe |
DE3204750C2 (de) * | 1982-02-11 | 1984-04-26 | Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh, 6334 Asslar | Magnetisch gelagerte Turbomolekularpumpe |
JPS59168295A (ja) * | 1983-03-16 | 1984-09-21 | Hitachi Ltd | タ−ボ分子ポンプ |
US4806075A (en) * | 1983-10-07 | 1989-02-21 | Sargent-Welch Scientific Co. | Turbomolecular pump with improved bearing assembly |
DE3410905A1 (de) * | 1984-03-24 | 1985-10-03 | Leybold-Heraeus GmbH, 5000 Köln | Einrichtung zur foerderung von gasen bei subatmosphaerischen druecken |
JPS61294191A (ja) * | 1985-06-24 | 1986-12-24 | Seiko Seiki Co Ltd | タ−ボ分子ポンプの装着装置 |
JPS63128286U (de) * | 1987-02-16 | 1988-08-22 | ||
JPH0641566Y2 (ja) * | 1987-09-04 | 1994-11-02 | 昭一 水村 | ゴルフのクラブやゲートボールのスティック等における変形シャフトの取付構造 |
JPH0759955B2 (ja) * | 1988-07-15 | 1995-06-28 | ダイキン工業株式会社 | 真空ポンプ |
JPH07117067B2 (ja) * | 1988-12-30 | 1995-12-18 | 株式会社島津製作所 | 分子ポンプ |
EP0408791B1 (de) * | 1989-07-20 | 1994-03-16 | Leybold Aktiengesellschaft | Reibungspumpe mit glockenförmigem Rotor |
DE3926577A1 (de) | 1989-08-11 | 1991-02-14 | Leybold Ag | Vakuumpumpe mit einem rotor und mit unter vakuum betriebenen rotorlagerungen |
DE4314419A1 (de) * | 1993-05-03 | 1994-11-10 | Leybold Ag | Reibungsvakuumpumpe mit Lagerabstützung |
JPH071395A (ja) * | 1993-06-15 | 1995-01-06 | Souzou Kagaku:Kk | 超音波加工用工具クランプ方法 |
JP3427950B2 (ja) * | 1994-11-17 | 2003-07-22 | 株式会社島津製作所 | モレキュラドラッグポンプ |
FR2735535B1 (fr) * | 1995-06-16 | 1997-07-11 | Cit Alcatel | Pompe turbomoleculaire |
JP2001241393A (ja) * | 1999-12-21 | 2001-09-07 | Seiko Seiki Co Ltd | 真空ポンプ |
-
1998
- 1998-10-07 DE DE19846189A patent/DE19846189A1/de not_active Withdrawn
-
1999
- 1999-07-28 DE DE59902592T patent/DE59902592D1/de not_active Expired - Fee Related
- 1999-07-28 EP EP99938360A patent/EP1119710B1/de not_active Expired - Lifetime
- 1999-07-28 US US09/807,058 patent/US6641376B1/en not_active Expired - Fee Related
- 1999-07-28 WO PCT/EP1999/005395 patent/WO2000020763A1/de active IP Right Grant
- 1999-07-28 JP JP2000574841A patent/JP2002526721A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
US6641376B1 (en) | 2003-11-04 |
DE19846189A1 (de) | 2000-04-13 |
JP2002526721A (ja) | 2002-08-20 |
DE59902592D1 (de) | 2002-10-10 |
EP1119710A1 (de) | 2001-08-01 |
WO2000020763A1 (de) | 2000-04-13 |
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