WO2006051675A1 - ターボ分子ポンプの軸封防塵構造 - Google Patents
ターボ分子ポンプの軸封防塵構造 Download PDFInfo
- Publication number
- WO2006051675A1 WO2006051675A1 PCT/JP2005/019276 JP2005019276W WO2006051675A1 WO 2006051675 A1 WO2006051675 A1 WO 2006051675A1 JP 2005019276 W JP2005019276 W JP 2005019276W WO 2006051675 A1 WO2006051675 A1 WO 2006051675A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- turbo molecular
- dust
- shaft
- motor housing
- molecular pump
- Prior art date
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
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/102—Shaft sealings especially adapted for elastic fluid pumps
- F04D29/104—Shaft sealings especially adapted for elastic fluid pumps the sealing fluid being other than the working fluid or being the working fluid treated
-
- 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
Definitions
- the present invention relates to a turbo-molecular pump particularly suitable for evacuation of gas containing corrosive gas or dust.
- a turbo molecular pump is an ultra-high vacuum pump used for evacuating a semiconductor manufacturing apparatus or the like.
- FIG. 5 shows a longitudinal sectional view of an example of a conventional turbo molecular pump.
- a is an intake port
- b force exhaust port
- c is a rotor
- the rotor c is fixedly fitted to a rotary shaft d, and the rotary shaft d is supported on a motor housing g by a drive motor e, a dolly lubricated ball bearing f, and the like.
- a dynamic pressure screw seal i is provided on the outer peripheral portion of the rotating shaft d and purge gas is supplied to the motor housing g. Provide a port so that a clean purge gas flows from the motor housing g side to the pump chamber k side.
- turbo molecular pump seal structure in which a fixed clearance seal portion is provided adjacent to the dynamic pressure screw seal portion (see, for example, Patent Document 1).
- Patent Document 1 Japanese Unexamined Patent Publication No. 2004-162533
- the present invention solves the above problems and prevents the entry of corrosive gas into the motor housing.
- the purpose of the present invention is to provide a shaft-sealed dust-proof structure for a turbo-molecular pump that can stop and prevent the entry of dust and the like.
- the present invention provides a turbo molecular pump provided with a purge gas supply port in the motor housing for preventing exhaust gas from reaching the motor housing to achieve the above object!
- a shaft seal portion composed of a clearance seal portion and a centrifugal blade dustproof portion was provided in the purge gas path leading from the motor housing to the pump chamber.
- FIG. 1 is a longitudinal sectional view showing the structure of the main part of Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional view taken along line AA in FIG.
- FIG. 3 is a longitudinal sectional view showing the structure of the main part of Embodiment 2 of the present invention.
- FIG. 4 is a plan view of a centrifugal impeller according to the second embodiment.
- FIG. 5 is a longitudinal sectional view of an example of a conventional turbo molecular pump.
- FIG. 1 is a longitudinal sectional view of a shaft seal portion of a turbo molecular pump having a shaft seal dust-proof structure according to Embodiment 1 of the present invention.
- reference numeral 1 denotes a rotor, and the rotor 1 is fixedly fixed to a rotating shaft 2 that passes through the central portion thereof.
- FIG. 2 shows a cross-sectional view taken along line AA in FIG.
- a boss lb projecting in the axial direction is formed concentrically with the rotary shaft 2 at the center of the disk la of the rotor 1, and the outer periphery of the boss lb and the boss lb are rotatable.
- a clearance seal portion 3a having a very small distance from the inner peripheral portion of the guide bracket 3 that passes through the guide bracket 3 is formed.
- the rotating shaft 2 is supported by a motor housing 5 via a grease lubricated ball bearing 4 and a flange 6.
- the guide bracket 3 is fixed to the motor housing 5 via a flange 6.
- Reference numeral 7 denotes a drive motor.
- the purge gas bypass passage 6a is opened through the flange 6! /, And the purge gas is discharged from the purge gas bypass passage 6a toward the clearance seal portion 3a.
- the purge gas bypass flow path 6 a passes through the purge gas bypass flow path 6 a provided so as to be parallel to the purge gas force ball bearing 4 discharged from the purge gas supply port 5 a in the motor housing 5. It is designed to flow to part 3a.
- a plurality of straight blades lc are arranged radially to form a centrifugal blade, and the straight blades lc And guide bra
- the centrifugal blade dustproof portion 3b is formed with the upper end surface portion of the bucket 3.
- the suction side of the centrifugal blade dust-proof portion 3b communicates with the outlet side of the clearance seal portion 3a.
- the centrifugal blade dustproof portion 3b is arranged on the downstream side of the clearance seal portion 3a.
- This molecular pump is used to evacuate gas containing corrosive gas and dust.
- the purge gas released from the purge gas supply port 5a during the molecular pump operation passes through the purge gas bypass passage 6a and the clearance seal portion 3a, and then passes through the centrifugal blade dustproof portion 3b and reaches the pump chamber 8. Flowing through the path.
- the exhaust gas entering from the pump chamber 8 is prevented from entering by the clearance seal portion 3a, and fine particles such as dust mixed in the exhaust gas are blocked in the centrifugal blade dust-proof portion 3b. Since they are blown off by centrifugal force, these dusts and exhaust gas do not enter the inside of the clearance seal portion 3a.
- the turbo molecular pump of this embodiment since harmful exhaust gas, dust, and the like enter the ball bearing 4 and the like, the turbo molecular pump of this embodiment has a long life and can be operated for a long time. .
- FIG. 3 is a longitudinal sectional view of the shaft sealing portion of the turbo molecular pump having a shaft sealing dust-proof structure according to the second embodiment of the present invention.
- the second embodiment is different from the first embodiment in that the centrifugal blade dust-proof portion is arranged on the upstream side of the clearance seal portion.
- a centrifugal impeller 10 provided coaxially with the centrifugal impeller 10 includes a centrifugal impeller 10 and a disc 11 provided on the lower surface of the centrifugal impeller 10 forms a centrifugal impeller dust-proof portion 10b.
- annular space portion 10c is formed on the outer peripheral side of the centrifugal impeller 10, and a low degree of grease 10d is applied to the wall surface of the annular space portion 10c.
- the consistency is an index of the softness of the grease.
- a hard grease having a consistency of 200 or less is used.
- the annular space portion 10c communicates with the clearance seal portion 9a.
- the guide bracket 9 is fixed to the motor housing 5 via the disk 11 and the flange 6, and a purge gas bypass passage 6 a is opened through the flange 6.
- the purge gas released from the purge gas supply port 5a during the molecular pump operation passes through the clearance between the outer periphery of the purge gas bin passage 6a and the boss 10e of the centrifugal impeller 10 and the inner periphery of the disk 11. And flows along the path to the pump chamber 8 through the centrifugal blade dustproof portion 10b and the clearance seal portion 9a.
- the exhaust gas entering from the pump chamber 8 is prevented from entering by the clearance seal portion 9a, and the dust or the like that reaches the clearance seal portion 9a together with the exhaust gas or the like is, for example, the purge gas.
- the clearance seal part 9a is overcome by overcoming this, it will be blocked by the centrifugal blade dustproof part 10b ahead of it and will not adversely affect the internal grease lubricated ball bearing 4 etc.
- the present invention is particularly used in a vacuum exhaust apparatus for a gas containing fine particles such as corrosive gas and dust.
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
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004326453A JP4679119B2 (ja) | 2004-11-10 | 2004-11-10 | ターボ分子ポンプの軸封防塵構造 |
JP2004-326453 | 2004-11-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006051675A1 true WO2006051675A1 (ja) | 2006-05-18 |
Family
ID=36336358
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/019276 WO2006051675A1 (ja) | 2004-11-10 | 2005-10-20 | ターボ分子ポンプの軸封防塵構造 |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP4679119B2 (ja) |
CN (1) | CN100516540C (ja) |
WO (1) | WO2006051675A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5141065B2 (ja) * | 2007-03-26 | 2013-02-13 | 株式会社島津製作所 | ターボ分子ポンプ |
GB2475254B (en) | 2009-11-11 | 2016-02-10 | Edwards Ltd | Vacuum pump |
JP6079052B2 (ja) | 2012-08-24 | 2017-02-15 | 株式会社島津製作所 | 真空ポンプ |
KR101391408B1 (ko) | 2013-02-20 | 2014-05-07 | 주식회사 청석 | 모터 방수수단을 구비한 펌프 |
CN110821875A (zh) * | 2019-11-28 | 2020-02-21 | 周东良 | 一种工业环保用离心式除尘排风机 |
CN115596699B (zh) * | 2022-10-18 | 2023-08-22 | 北京中科科仪股份有限公司 | 脂润滑分子泵轴承保护结构、其制造方法及脂润滑分子泵 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63227990A (ja) * | 1987-02-25 | 1988-09-22 | アルカテル・セイテ | 回転式真空ポンプ |
JPH01237397A (ja) * | 1988-03-18 | 1989-09-21 | Hitachi Ltd | 真空ポンプ |
JPH0722098U (ja) * | 1993-09-16 | 1995-04-21 | 株式会社大阪真空機器製作所 | 真空ポンプにおける防塵機構 |
JP2002147385A (ja) * | 2000-11-08 | 2002-05-22 | Osaka Vacuum Ltd | ターボ分子ポンプのシール構造 |
-
2004
- 2004-11-10 JP JP2004326453A patent/JP4679119B2/ja active Active
-
2005
- 2005-10-20 CN CNB2005800361210A patent/CN100516540C/zh active Active
- 2005-10-20 WO PCT/JP2005/019276 patent/WO2006051675A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63227990A (ja) * | 1987-02-25 | 1988-09-22 | アルカテル・セイテ | 回転式真空ポンプ |
JPH01237397A (ja) * | 1988-03-18 | 1989-09-21 | Hitachi Ltd | 真空ポンプ |
JPH0722098U (ja) * | 1993-09-16 | 1995-04-21 | 株式会社大阪真空機器製作所 | 真空ポンプにおける防塵機構 |
JP2002147385A (ja) * | 2000-11-08 | 2002-05-22 | Osaka Vacuum Ltd | ターボ分子ポンプのシール構造 |
Also Published As
Publication number | Publication date |
---|---|
JP2006138216A (ja) | 2006-06-01 |
JP4679119B2 (ja) | 2011-04-27 |
CN101044323A (zh) | 2007-09-26 |
CN100516540C (zh) | 2009-07-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5148687B2 (ja) | フィルタ装置 | |
WO2006051675A1 (ja) | ターボ分子ポンプの軸封防塵構造 | |
JP5738869B2 (ja) | ターボ分子ポンプ | |
JP6331491B2 (ja) | 真空ポンプ | |
CN102410224A (zh) | 真空泵 | |
JP2013508595A (ja) | 真空ポンプ | |
JP2008121589A (ja) | 電動送風機およびこれを用いた電気掃除機 | |
JP3168894U (ja) | コンプレッサ用洗浄装置 | |
JP5670095B2 (ja) | 真空ポンプ | |
JP2015504137A (ja) | ターボ分子ポンプ | |
US11209021B2 (en) | Centrifugal rotary machine | |
JP6390098B2 (ja) | 真空ポンプ | |
US11041497B1 (en) | Centrifugal rotary machine | |
US20230042886A1 (en) | Vacuum pump, vacuum pump set for evacuating a semiconductor processing chamber and method of evacuating a semiconductor processing chamber | |
JPH04136497A (ja) | ターボ真空ポンプ | |
JPH0457879B2 (ja) | ||
WO2017154151A1 (ja) | 電動送風機および電気掃除機 | |
CN101344099A (zh) | 电动送风机及装载它的电吸尘器 | |
TW202130914A (zh) | 渦輪分子真空泵 | |
JP2010190080A (ja) | 遠心圧縮機 | |
JP5486184B2 (ja) | 真空ポンプ | |
JPH04116693U (ja) | 真空ポンプ | |
KR101429516B1 (ko) | 원심압축기 | |
JP4249946B2 (ja) | 改良型真空ポンプ | |
JPH04127891U (ja) | 真空ポンプ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KM KP KR KZ LC LK LR LS LT LU LV LY MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU LV MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 200580036121.0 Country of ref document: CN |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 05795599 Country of ref document: EP Kind code of ref document: A1 |