EP1090231A1 - Pompe a vide rotative munie d'un chassis, d'un rotor et d'un carter, et dispositif pourvu d'une pompe a vide rotative de ce type - Google Patents

Pompe a vide rotative munie d'un chassis, d'un rotor et d'un carter, et dispositif pourvu d'une pompe a vide rotative de ce type

Info

Publication number
EP1090231A1
EP1090231A1 EP99917896A EP99917896A EP1090231A1 EP 1090231 A1 EP1090231 A1 EP 1090231A1 EP 99917896 A EP99917896 A EP 99917896A EP 99917896 A EP99917896 A EP 99917896A EP 1090231 A1 EP1090231 A1 EP 1090231A1
Authority
EP
European Patent Office
Prior art keywords
housing
vacuum pump
friction
stator
pump according
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
Application number
EP99917896A
Other languages
German (de)
English (en)
Other versions
EP1090231B2 (fr
EP1090231B1 (fr
Inventor
Ralf Adamietz
Christian Beyer
Günter Schütz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leybold GmbH
Original Assignee
Leybold Vakuum GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26046389&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1090231(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE19901340.3A external-priority patent/DE19901340B4/de
Application filed by Leybold Vakuum GmbH filed Critical Leybold Vakuum GmbH
Priority to EP03029746.9A priority Critical patent/EP1422423B2/fr
Publication of EP1090231A1 publication Critical patent/EP1090231A1/fr
Application granted granted Critical
Publication of EP1090231B1 publication Critical patent/EP1090231B1/fr
Publication of EP1090231B2 publication Critical patent/EP1090231B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
    • F04D29/602—Mounting in cavities

Definitions

  • Frictional vacuum pump with chassis, rotor and housing as well as device, equipped with a frictional vacuum pump of this type
  • the invention relates to a friction vacuum pump with a chassis, rotor and housing.
  • the invention also relates to a device which is equipped with a chamber to be evacuated and with a friction vacuum pump of this type.
  • connection flange arranged on the front side, with which the friction vacuum pumps are connected to devices with chambers to be evacuated. Since there are different flange types and flange sizes, it is necessary for the manufacturer of friction vacuum pumps to produce and keep a large number of friction vacuum pump types in order to be able to meet all customer application requirements.
  • Frictional vacuum pumps of this type are preferably used for the evacuation of corpuscular beam devices (e.g. mass spectrometers) with chambers separated from one another by orifices, in which different pressures are to be generated and maintained during operation of the corpuscular beam device.
  • corpuscular beam devices e.g. mass spectrometers
  • applications of this type significantly increase the effort for the manufacture and / or maintenance of friction vacuum pumps, which should be suitable for as many customer requests as possible.
  • the object of the present invention is to simplify the adaptation of the friction vacuum pump to the variety of applications specified by the customer.
  • the housing consists of two housing parts, that the first, inner housing is essentially cylindrical, surrounds the stator and is equipped with a passage opening for the gases entering the pump and that the second housing is a has the first housing with the components of the pump accommodating bore therein.
  • the inner housing ensures that the individual components of the friction vacuum pump are assigned to each other. This creates a friction vacuum pump in the form of a slide-in module, which can already be subjected to many functional tests, such as balancing.
  • the outer casing has the task of adapting the friction vacuum pump, which is functional even without the outer casing, to the customer's application. It is no longer necessary to manufacture or keep a variety of friction pump types, but only one or a few universal, compact and functional pump units (inserts, cartridges) and the outer housing adapted to the respective customer application.
  • a particular advantage of the invention is that it is also possible to leave the construction of the second, outer housing to the customer. It is sufficient to inform the customer about the external dimensions of the slide-in friction vacuum pump.
  • a particularly simple solution for him is that he provides a hole in the housing or housing part of his device (system, device or the like with one or more chambers to be evacuated), into which the insert-shaped friction pump can be used. When ready for operation, the housing or housing part of the customer's device then forms the second outer housing of the friction vacuum pump according to the invention. This eliminates the need for a separate, complex connection housing. In addition, conductance losses due to the connection of the friction vacuum pump close to the chamber are kept low, thus realizing the process-dependent low chamber pressures. An optimal conductance situation is achieved. Further advantages and details of the invention will be explained with reference to the exemplary embodiments shown in FIGS. 1 to 3. Show it
  • FIG. 1 shows a friction vacuum pump according to the invention equipped with three pump stages
  • FIG. 2 shows a turbomolecular vacuum pump according to the invention
  • FIG 3 shows a device equipped with a friction vacuum pump according to the invention
  • FIG. 1 shows a friction vacuum pump 1 with a stator 3, rotor 4 and chassis 5.
  • the motor drive 6, 7 the armature 7 of which is supported by the bearings 8 in the chassis 5.
  • the shaft 9, which carries the rotor 4 out of the chassis 5, is connected to the armature 7.
  • the axis of rotation of the rotor system is designated 11.
  • the friction vacuum pump 1 has three pump stages 12, 13, 14, two (12, 13) of which are designed as turbomolecular vacuum pump stages and one (14) as a molecular (Holweck) pump stage.
  • the outlet of the pump 17 connects to the molecular pump stage 14.
  • the pump 1 is equipped with two housings 18, 19.
  • the inner housing 18 is essentially cylindrical and surrounds the stator 3. On its high-vacuum side, it is equipped with an inwardly directed edge 20 which rests on the stator 3 and in this case at the same time the upper one Stator ring forms.
  • the housing 18 On the fore-vacuum side, the housing 18 is fastened to the chassis 5, specifically with the aid of the flange 21.
  • the flange 21 and chassis 5 are connected to one another in a vacuum-tight manner.
  • the sealing ring 21 ' is arranged between the flange 21 and the chassis 5.
  • the outer housing 19 has an inner bore 22 with an inward step 23, the height of which corresponds to the width of the edge 20 on the first housing 18.
  • a seal 24 between the edge 20 and the step 23, which is expediently let into the end face of the housing 18.
  • a radial seal is also possible.
  • the housing 19 also has a device, e.g. the flange 25 with which it is attached to the chassis 5 or to the housing 18. After loosening this attachment, the unit formed by the inner housing 18 and the components therein can be removed as a whole from the bore 22. It forms an insert 27 that is independent of the second housing 19.
  • the first pump stage 12 located on the high vacuum side, consists of four pairs of rotor blade rows and stator blade rows. Your inlet, the effective gas passage area, is designated by 26. The edge 20 surrounds the gas passage area 26 and forms a passage opening 28 for gases entering the pump 1.
  • the first pump stage 12 is followed by the second pump stage 13, which consists of three pairs of a row of stator blades and one row of rotor blades. Your entrance is marked with 29.
  • the second pump stage 13 is spaced apart from the first pump stage 12.
  • the selected distance (height) a ensures free access to the gas molecules to be conveyed Gas inlet 29.
  • the distance a is greater than a quarter, preferably greater than a third, of the diameter of the rotor system 4.
  • the adjoining Holweck pump comprises a rotating cylinder section 30 which is opposed by stator elements 33, 34 equipped on the outside and inside in a known manner, each with a threaded groove 31, 32.
  • Another opening formed by the inner housing 18 is arranged laterally and is designated by 35. It serves for the passage of gases which are fed directly to the inlet 29 of the second pump stage 13.
  • the outer housing 19 has the task of connecting the pump 1 or two pump stages (12, 13) of this pump to the customer's device.
  • the housing 19 is designed such that the planes of all the connecting openings 36, 37 are located on the side.
  • the distance between the opening 37 and the associated gas inlet 29 is very small, so that conductance losses which impair the pumping speed of the pump stage 13 are negligible.
  • the diameter of the connection opening 37 exceeds the height a by approximately twice. This measure also serves to reduce the conductance losses between inlet 29 and connection opening 37.
  • the lateral connection openings can each be equipped with a flange. In the embodiment of Figure 1, a common flange 39 is provided.
  • the pump 1 shown and its pump-effective elements are expediently designed in such a way that closing opening 36 a pressure of 10 ⁇ 4 to 10 "7 , preferably 10 " 5 to 10 "6 , and a pressure of about 10 ⁇ 2 to 10 ⁇ 4 mbar is generated in the area of the connection opening 37.
  • the second pumping stage is intended to produce a high pumping speed (for example 200 1 / s).
  • the subsequent two-stage Holweck pumping stage (29, 30; 29, 31) ensures high fore-vacuum resistance, so that the pumping speed of the second pumping stage is usually independent of the fore-vacuum pressure.
  • this goal can be achieved by appropriately designing the blades of the first pump stage 12.
  • Another possibility is to arrange an orifice 38 in front of the inlet 26 of the first pump stage, the inner diameter of which determines the desired pumping speed.
  • FIG. 2 shows a single-flow friction vacuum pump 1, the pump-active surfaces of which are formed exclusively by stator blades 41 and rotor blades 42 (turbomolecular vacuum pump).
  • the second, outer housing 19 carries on the end face the flange 43 which surrounds the connection opening 44 arranged on the end face. In order to equip a pump 1 of this type with a different flange type and / or flange size, it is only necessary to disassemble the outer housing 19 and to replace it with a housing 19 with the desired flange.
  • FIG. 3 shows a device 51 according to the invention with chambers 52, 53, 54 to be evacuated and a slide-in unit 27 as described for FIG. 1.
  • the housing of the device - for example a cork muscular beam device - is essentially formed in one piece and is designated 55.
  • the housing In the immediate vicinity of the chambers 53, 54 to be evacuated, the housing is equipped with the bore 22 in which the insert 27 is located.
  • the chambers 53, 54 are connected to the respective inlets 26, 29 via the through openings 28, 35 in the housing 18 of the insert 27 and the connecting openings 36, 37.
  • the integration of the insert 27 in the housing of the device 51 eliminates the need for separate connection means.
  • the distances between the chambers 53, 54 to be evacuated and the inlets 26, 29 are optimally small.
  • the essence of the present idea is that a largely functional unit (insert, cartridge) of a friction vacuum pump is detachably mounted in a housing adapted to the application.
  • the inner housing 18 described so far has the task of combining the functional elements of the friction vacuum pump into the desired unit.
  • other components - such as tie rods, brackets or the like. - be present who fulfill this ' task.
  • two components 18 and 19, 55 are provided for the fulfillment of the functions of the otherwise usual housing in the subject matter of the invention.
  • the two components are formed by two concentric housings, of which the inner one serves for centering, assigning and holding the chassis 5, stator 3 and rotor 4, which thereby makes the already operational, independent of the outer housing Form insert.
  • the outer housing 19, 55 seals the vacuum pump to the outside and is used for connection to the chambers to be evacuated, be it via connecting flanges or because it is already part of the device with the chambers to be evacuated. It is particularly expedient to replace the inner housing with a tie rod system for the inner insert. This enables a more compact design of the inner insert.
  • components held together by the tie rod system can be manufactured more easily. For example, the tie rods center the stator rings so that they no longer have to be equipped with centering means.
  • FIGS. 4 and 5 show exemplary embodiments (FIG. 4: longitudinal section through an insert 27; FIG. 5: cross section through an insert 27 at the level of the opening 35) for an inner insert 27 with a tie rod system 61.
  • This comprises three to six (or more) Tie rods 62 as well as bores and threads in the components (chassis 5, stator 3), which are to be joined together by the tie rod system 61 to form a structural unit.
  • FIGS. 4 and 5 show that the opening 35 extends over the entire circumference of the insert 27 and is only interrupted by the tie rods 62.
  • the access of the gas molecules to the inlet 29 of the pump stage 13 (shown in plan view in FIG. 5) is thereby almost unhindered.
  • the outer housing - be it the second housing 18, which fulfills further functions of a pump housing, or a housing 55, which is part of a device with chambers to be evacuated - is attached to the flange 21 of the chassis 5.
  • FIG. 4 shows the structure of tie rods 62 which are of particularly advantageous design. They are formed in two parts.
  • the fore-vacuum tie rod sections 63 with their heads 64 pass through the stator rings of the pump stage 13 and the outer stator element 33 of the pump stage 14. Their threaded ends are screwed into the flange 21 of the chassis 5.
  • the length of the heads 64 determines the axial extent of the opening 35.
  • the heads 64 are each provided with an internal thread into which the tie rod sections 65 on the high-vacuum side can be screwed.
  • Their heads 66 rest on the uppermost stator ring of the pump stage 13. Otherwise, they penetrate the stator rings of the pump stage 12 and, in the screwed-in state, thereby not only connect the high vacuum stage 12 to the other stages 13 and 14, but also center the stator rings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Positive Displacement Air Blowers (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une pompe à vide rotative (1) comprenant un châssis (5), un stator (3), un rotor (4) et un carter. Tous les éléments de fonction de la pompe sont réunis en une unité (22) insérée quant à elle dans un carter (19, 55) adaptée à l'utilisation. Ces mesures permettent de ne plus avoir recours à des boîtiers de connexion individuels et de parvenir à des situations d'admittance optimales.
EP99917896.5A 1998-05-26 1999-03-27 Pompe a vide rotative munie d'un chassis, d'un rotor et d'un carter, et dispositif pourvu d'une pompe a vide rotative de ce type Expired - Lifetime EP1090231B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03029746.9A EP1422423B2 (fr) 1998-05-26 1999-03-27 Appareil avec boîtier pouvant être mis à vide

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19823270 1998-05-26
DE19823270 1998-05-26
DE19901340 1999-01-15
DE19901340.3A DE19901340B4 (de) 1998-05-26 1999-01-15 Reibungsvakuumpumpe mit Chassis, Rotor und Gehäuse sowie Einrichtung, ausgerüstet mit einer Reibungsvakuumpumpe dieser Art
PCT/EP1999/002122 WO1999061799A1 (fr) 1998-05-26 1999-03-27 Pompe a vide rotative munie d'un chassis, d'un rotor et d'un carter, et dispositif pourvu d'une pompe a vide rotative de ce type

Related Child Applications (3)

Application Number Title Priority Date Filing Date
EP03029746.9A Division EP1422423B2 (fr) 1998-05-26 1999-03-27 Appareil avec boîtier pouvant être mis à vide
EP03029746.9A Division-Into EP1422423B2 (fr) 1998-05-26 1999-03-27 Appareil avec boîtier pouvant être mis à vide
EP03029746.9 Division-Into 2003-12-23

Publications (3)

Publication Number Publication Date
EP1090231A1 true EP1090231A1 (fr) 2001-04-11
EP1090231B1 EP1090231B1 (fr) 2005-10-05
EP1090231B2 EP1090231B2 (fr) 2015-07-08

Family

ID=26046389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99917896.5A Expired - Lifetime EP1090231B2 (fr) 1998-05-26 1999-03-27 Pompe a vide rotative munie d'un chassis, d'un rotor et d'un carter, et dispositif pourvu d'une pompe a vide rotative de ce type

Country Status (5)

Country Link
US (1) US6457954B1 (fr)
EP (1) EP1090231B2 (fr)
JP (1) JP4520636B2 (fr)
DE (2) DE59912629D1 (fr)
WO (1) WO1999061799A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007010068A1 (de) 2007-02-28 2008-09-04 Thermo Fisher Scientific (Bremen) Gmbh Vakuumpumpe oder Vakuumapparatur mit Vakuumpumpe
DE202008011489U1 (de) 2008-08-28 2010-01-07 Oerlikon Leybold Vacuum Gmbh Stator-Rotor-Anordnung für eine Vakuumpumpe sowie Vakuumpumpe
EP2228540A2 (fr) 2009-03-14 2010-09-15 Pfeiffer Vacuum GmbH Agencement doté d'une pompe à vide
DE202013003855U1 (de) 2013-04-25 2014-07-28 Oerlikon Leybold Vacuum Gmbh Untersuchungseinrichtung sowie Multi-Inlet-Vakuumpumpe

Families Citing this family (19)

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DE10308420A1 (de) * 2003-02-27 2004-09-09 Leybold Vakuum Gmbh Testgaslecksuchgerät
ITTO20030421A1 (it) * 2003-06-05 2004-12-06 Varian Spa Pompa da vuoto compatta
GB0322883D0 (en) * 2003-09-30 2003-10-29 Boc Group Plc Vacuum pump
GB0409139D0 (en) 2003-09-30 2004-05-26 Boc Group Plc Vacuum pump
GB0414316D0 (en) * 2004-06-25 2004-07-28 Boc Group Plc Vacuum pump
DE102006020710A1 (de) 2006-05-04 2007-11-08 Pfeiffer Vacuum Gmbh Vakuumpumpe mit Gehäuse
US20070263477A1 (en) * 2006-05-11 2007-11-15 The Texas A&M University System Method for mixing fluids in microfluidic channels
CN101981321B (zh) * 2008-03-31 2014-05-28 株式会社岛津制作所 涡轮式分子泵
GB2462804B (en) * 2008-08-04 2013-01-23 Edwards Ltd Vacuum pump
GB2473839B (en) * 2009-09-24 2016-06-01 Edwards Ltd Mass spectrometer
FR2984972A1 (fr) * 2011-12-26 2013-06-28 Adixen Vacuum Products Adaptateur pour pompes a vide et dispositif de pompage associe
DE202012000611U1 (de) * 2012-01-21 2013-04-23 Oerlikon Leybold Vacuum Gmbh Turbomolekularpumpe
CN104541063B (zh) * 2012-09-26 2018-08-31 埃地沃兹日本有限公司 转子及具备该转子的真空泵
GB201314841D0 (en) 2013-08-20 2013-10-02 Thermo Fisher Scient Bremen Multiple port vacuum pump system
EP3460249B1 (fr) * 2015-07-01 2021-03-24 Pfeiffer Vacuum GmbH Pompe à vide à debit partagé
JP7196763B2 (ja) * 2018-10-25 2022-12-27 株式会社島津製作所 ターボ分子ポンプおよび質量分析装置
EP3564538B1 (fr) * 2019-02-20 2021-04-07 Pfeiffer Vacuum Gmbh Système à vide et procédé de fabrication d'un tel système à vide
GB2592043A (en) * 2020-02-13 2021-08-18 Edwards Ltd Axial flow vacuum pump
EP4293233B1 (fr) * 2023-10-18 2025-12-03 Pfeiffer Vacuum Technology AG Appareil à vide

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007010068A1 (de) 2007-02-28 2008-09-04 Thermo Fisher Scientific (Bremen) Gmbh Vakuumpumpe oder Vakuumapparatur mit Vakuumpumpe
DE202008017530U1 (de) 2007-02-28 2009-12-17 Thermo Fisher Scientific (Bremen) Gmbh Vakuumpumpe oder Vakuumapparatur mit Vakuumpumpe
DE202008011489U1 (de) 2008-08-28 2010-01-07 Oerlikon Leybold Vacuum Gmbh Stator-Rotor-Anordnung für eine Vakuumpumpe sowie Vakuumpumpe
WO2010023200A1 (fr) 2008-08-28 2010-03-04 Oerlikon Leybold Vacuum Gmbh Ensemble stator-rotor pour une pompe à vide ainsi que pompe à vide
EP2228540A2 (fr) 2009-03-14 2010-09-15 Pfeiffer Vacuum GmbH Agencement doté d'une pompe à vide
DE102009013244A1 (de) 2009-03-14 2010-09-16 Pfeiffer Vacuum Gmbh Anordnung mit Vakuumpumpe
EP2228540A3 (fr) * 2009-03-14 2014-07-16 Pfeiffer Vacuum GmbH Agencement doté d'une pompe à vide
DE202013003855U1 (de) 2013-04-25 2014-07-28 Oerlikon Leybold Vacuum Gmbh Untersuchungseinrichtung sowie Multi-Inlet-Vakuumpumpe

Also Published As

Publication number Publication date
DE59912629D1 (de) 2006-02-16
JP2002516959A (ja) 2002-06-11
JP4520636B2 (ja) 2010-08-11
EP1090231B2 (fr) 2015-07-08
EP1090231B1 (fr) 2005-10-05
WO1999061799A1 (fr) 1999-12-02
DE59912626D1 (de) 2006-02-16
US6457954B1 (en) 2002-10-01

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