WO2010015501A1 - Verwendung eines wälzlagers zur lagerung rotierender bauteile in vakuumeinrichtungen sowie vakuumeinrichtung - Google Patents
Verwendung eines wälzlagers zur lagerung rotierender bauteile in vakuumeinrichtungen sowie vakuumeinrichtung Download PDFInfo
- Publication number
- WO2010015501A1 WO2010015501A1 PCT/EP2009/059245 EP2009059245W WO2010015501A1 WO 2010015501 A1 WO2010015501 A1 WO 2010015501A1 EP 2009059245 W EP2009059245 W EP 2009059245W WO 2010015501 A1 WO2010015501 A1 WO 2010015501A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bearing
- vacuum
- use according
- elements
- sealing
- 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/059—Roller bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/02—Arrangements of bearings
-
- 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
- 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
- F04D19/042—Turbomolecular vacuum pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7846—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with a gap between the annular disc and the inner race
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/80—Labyrinth sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/46—Gap sizes or clearances
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/40—Application independent of particular apparatuses related to environment, i.e. operating conditions
- F16C2300/62—Application independent of particular apparatuses related to environment, i.e. operating conditions low pressure, e.g. elements operating under vacuum conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/44—Centrifugal pumps
- F16C2360/45—Turbo-molecular pumps
Definitions
- the invention relates to the use of a rolling bearing for supporting rotating components in Vakuumeinreichtungen and a vacuum device.
- Vacuum devices such as vacuum pumps, have pumped elements arranged in a pumping chamber.
- the pumping elements are, for example, Roots pistons, screw rotors and the like.
- the Pumpeniemente are usually each supported by a rotating shaft.
- Each shaft is usually supported by two bearing assemblies.
- the bearing assemblies have grease-lubricated bearings.
- the use of any rolling bearings in vacuum pumps is useful only in areas where the pressure does not fall below 10 "3 mbar.
- the rotating components such as in particular the Rotorwetle
- the rotating components are thus usually stored by grease-lubricated bearings.
- Rolling bearings currently used are only released for pressures up to 10 "3 mbar, but at lower pressures of less than 10 " 3 mbar there is a risk that the lubricant from the bearing space in which the rolling elements are located may be too large is sucked out, so that significantly reduces the bearing life.
- grease-lubricated bearings they must therefore be arranged in an area in which there is no high vacuum. For this purpose, expensive constructions are often required.
- the pump rotors of turbomolecular pumps are arranged on cantilevered shafts in order to be able to arrange the rolling bearing in a region with sufficiently high pressure.
- the resulting due to the flying bearing free cantilever shaft causes the length of the waves is limited and also considerable Lagerbelastunge ⁇ occur.
- such constructions are expensive and expensive.
- Magnetic bearings are expensive components which, in addition, must be additionally combined with safety bearings in order to ensure emergency operation if the magnetic bearing fails.
- the object of the invention is to simplify the construction of vacuum devices, which can be used even at relatively low pressures, in particular less than 10 "3 mbar.
- the rolling bearing according to the invention has two Lagereiemente, between which the rolling elements are arranged in the storage room.
- the bearing elements are, for example, an inner and an outer bearing ring.
- one of the two bearing rings can be dispensed with and formed directly by the shaft itself or the housing surrounding the shaft so that one of the two bearing elements is surrounded by the shaft or a component surrounding the welie, such as a housing.
- at least one sealing element is provided which ensures an at least one-sided sealing of the storage space in the axial direction with respect to a vacuum region.
- substantially annular sealing element formed the storage space in which the rolling elements and the lubricant are arranged, delimited from the vacuum region.
- the sealing element according to the invention is arranged to form a gap seal to one of the two bearing elements at a distance with particular small gap width.
- the sealing element is further connected directly or indirectly with the other bearing element.
- the sealing element can be firmly fixedly connected to the bearing ring or firmly to a component, such as a housing, which holds the bearing ring. If, for example, the outer bearing ring is stationary, so is the sealing element mounted stationary.
- the distance between the sealing element and one of the two bearing elements, ie the gap width smaller than the average free Path length of the molecules in the vacuum area.
- the mean free path of the molecules of air at 20 0 C is assumed.
- x can be specified for each gas in the interval 0.5 to 12,
- the gap width or the distance s is less than 20%, in particular less than 10% and particularly preferably less than 5% of a bearing element spacing h.
- the distance between the two bearing elements and the lateral clearance, i. the lateral opening of the bearing understood. It is particularly preferred that both the above formula for the gap width as a function of the pressure and the condition for the gap width as a function of the bearing element spacing are met.
- two opposing sealing elements are provided to seal the storage space on both sides.
- the two sealing elements may be configured differently, in particular a different gap width, ie have a different distance from the corresponding Lagereiement. This is due to the fact that the pressure on the two bearing sides be different can and, for example, on one of the two sides a sealing element with a larger gap width is sufficient. As a result, the manufacturing cost can be reduced.
- the at least one sealing element is firmly connected to the outer bearing element.
- the sealing gap between the inner bearing element, which may, for example, also be the rotating component itself, and the sealing element is formed.
- the length of the sealing gap is kept as short as possible. This has the advantage that the area through which lubricant can escape is reduced. Possibly. It is thus expedient, in a rolling bearing with an inner bearing element, such as a bearing ring, the sealing element in such a way that it is guided past the inner bearing ring and the effective gap width between the sealing element and the shaft is formed. As a result, even with bearings with inner ring a small Spaither be realized.
- the sealing element has a small distance to one of the two bearing elements or a component connected to this bearing element.
- the narrow sealing gap according to the invention by which low pressures in the adjacent vacuum region can be permitted, is thus provided directly between the sealing element and the bearing element or between the sealing element and the component connected to the corresponding bearing element, such as the rotating shaft ,
- the distance is preferably constant in the circumferential direction, so that the gap is a ring of constant width.
- the storage space in which the rolling elements and the lubricant are provided is preferred.
- the shape of the sealing elements can thus be chosen such that these have a small distance to the Wäiz stresses ⁇ or bearing the rolling elements cage.
- the use of the rolling bearing is erfindungsgernäß at a speed range of more than 6000 U / min, in particular at more than 30,000 U / min.
- the inventive design of the bearing used here has the advantage that despite the very high speeds, the corresponding bearing can be used at very low pressures.
- the rolling bearings described above are used to support the rotor shaft of turbomolecular pumps, the storage in particular on the suction side, d, h. the side where high vacuum prevails.
- a lubricant is in particular a composite of a lubricant and a thickener.
- the lubricant in this case has in particular oil or is oil-containing.
- Oil here is understood to mean not only a mineral or natural oil, but also a lubricant which has a liquid, microscopically visible state of aggregation in the field of application.
- the lubricant is pasty, which is understood to mean that upon application of low shear stresses ductile deformations of the outer shape are possible, but the outer shape does not change by its own weight and gravitational acceleration.
- the invention relates to a vacuum device, in particular a vacuum pump, with a roller bearing described above, in particular in the described preferred embodiments, wherein the rolling bearing is disposed in a vacuum region, in the pressures of less than 10 "3rd are permissible. This means that even if pressures of less than 10 "3 mbar occur in this range, an unchanged bearing life compared to operation at other pressures is to be expected.
- the vacuum pump has arranged in a pumping chamber pumping elements, such as Wälzkolben, screw rotors or the like.
- the pump elements are usually each connected to a rotating shaft supported by at least two bearing assemblies.
- One of the two bearing arrangements can be arranged according to the invention in a vacuum area with correspondingly low pressure.
- the vacuum device according to the invention in particular a preferred embodiment of the rolling bearing described above.
- Another independent invention is the rolling bearing itself, especially in the preferred embodiments described above.
- Fig. 2 is a schematic sectional view of a second embodiment of a rolling bearing, which can be used according to the invention
- Fig. 3 is a schematic, highly simplified sectional view of a
- Turbomolecular vacuum pump with a rolling bearing arranged in a low pressure range with a rolling bearing arranged in a low pressure range.
- the roller bodies 10 formed as balls are arranged between an inner bearing element or bearing ring 12 and an outer bearing element or bearing ring 14.
- the rolling elements 10 are held by a cage 16.
- a sealing element 22, 24 is arranged in each case.
- the two cranked in the illustrated embodiment sealing elements 22, 24 are connected via holding elements, such as retaining rings 28, fixed to the outer bearing ring.
- the sealing elements are designed such that they have a distance s to the inner bearing ring 12, wherein the gap width or the distance s with respect to the sealing element 22 and the sealing element 24 may differ. This depends on the use of the roller bearing according to the invention and the pressure prevailing in the two vacuum regions 18, 20.
- the gap width s is preferably smaller than the mean free path of the molecules of the vacuum surrounding the rolling bearing or the vacuum prevailing in the vacuum regions 18, 20. According to the invention, this embodiment can be smaller than 10.sup.- 3 mbar.
- the illustrated embodiment of the rolling bearing has different bearing element distances h on the two sides due to the asymmetrical configuration of the inner bearing ring 12. In this case, the clearance between the two bearing elements or Bearing rings 12, 14 understood.
- the inner bearing ring 12 is arranged on a shaft 30 and is pressed by a retaining element 32 for fixing against a bearing shoulder 34.
- the outer bearing ring 14 is arranged in a housing element 36 and fixed via a biased example with a spring 38 holding part 40.
- the holding part 40 is connected to the housing 36 corresponding to the outer bearing ring 14.
- the HaJteteii 40 thus also serves as a sealing element and therefore has according to the invention between a pointing in the direction of the shaft 30 inside 42 and a top 44 of the shaft 30 a distance s on.
- the sealing gap s in turn has the invention according to the narrow width in dependence on the pressure prevailing in the vacuum region 18.
- the storage space 26 includes in the illustrated embodiment also provided in the sealing elements 40 and 46 storage spaces 51, 52, in which also lubricants! is included.
- a component 46 is also firmly connected to the housing 36 as a sealing element.
- An inner surface 48 of the density element 46 pointing in the direction of the shaft 30 has, according to the invention, a short distance s to a top side 50 of the holding part 32. Possibly. it is also possible for the holding part 32 to be shorter in the region of the sealing spot s, so that the sealing gap s is formed directly between the surface 48 of the sealing element 46 and the upper side 44 of the shaft 30.
- the inner side 42 pointing in the direction of the shaft 30 has a width b.
- the width b is at least s.
- a thread 45 acting as an active conveying element can be provided on the upper side 44 of the shaft 30. Through the thread 45 lubricant molecules, which are deposited on the shaft 30, again promoted in the direction of the storage space 26.
- a corresponding thread can be provided on the opposite side, ie on the inner side 42.
- the thread only has to have a small depth, so that spiral depressions are sufficient as an active conveying element, even when rotating the shaft It should be noted that the spiral depressions in the direction of the storage space 26 are spiral-shaped, so that promotion takes place in the direction of the storage space 26.
- the storage space 26, in which the Wääz stresses 10 and the lubricant is disposed against one or both vacuum areas 18, 22 only a small compound in the form of the narrow sealing gap s. Furthermore, it is essential that a sealing gap s is provided so that the opposing, mutually rotating parts do not touch. This is particularly necessary because of the high speeds.
- Corresponding or similar bearings can, as shown schematically in FIG. 3, be used in a turbomolecular pump.
- the Turbomolekuiarpurnpe shown schematically in Fig, 3 has in one Pump housing 60 a Rotorwelie 62 on.
- the rotor shaft 62 carries as a pump element a rotor element 64.
- the rotor element 64 has rotor disks 66, between which stator disks 68 are arranged.
- the stationary stator disks 68 are held by stator rings 70.
- the Turbomoiekuiarpurnpe shown schematically in Fig. 3 sucks medium in the direction of arrow 72 and then ejects it in the direction of an arrow 74.
- the suction side of the turbo-vacuum pump there is a low pressure of preferably less than 10 -3 mbar.
- a bearing arrangement 76 which is, for example, a bearing, as shown in FIG 1 or 2, may be arranged in the vacuum region 20.
- the shaft is supported on the left side in FIG. 3 by a further bearing 78, which may possibly also be a simpler rolling bearing.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Compressor (AREA)
- Non-Positive Displacement Air Blowers (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09780783A EP2310632A1 (de) | 2008-08-06 | 2009-07-17 | Verwendung eines wälzlagers zur lagerung rotierender bauteile in vakuumeinrichtungen sowie vakuumeinrichtung |
CN2009801295303A CN102105653B (zh) | 2008-08-06 | 2009-07-17 | 用于支承旋转部件的滚动体轴承在真空设备中的应用以及真空设备 |
JP2011521509A JP2011530053A (ja) | 2008-08-06 | 2009-07-17 | 真空装置の回転要素を支持するための転動体軸受の使用方法、及び真空装置 |
US13/057,320 US20110255999A1 (en) | 2008-08-06 | 2009-07-17 | Use of a rolling-element bearing for bearing rotating components in vacuum devices and vacuum device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008036623.4 | 2008-08-06 | ||
DE102008036623A DE102008036623A1 (de) | 2008-08-06 | 2008-08-06 | Verwendung eines Wälzlagers zur Lagerung rotierender Bauteile in Vakuumeinirchtungen sowie Vakuumeinrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010015501A1 true WO2010015501A1 (de) | 2010-02-11 |
Family
ID=41360083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/059245 WO2010015501A1 (de) | 2008-08-06 | 2009-07-17 | Verwendung eines wälzlagers zur lagerung rotierender bauteile in vakuumeinrichtungen sowie vakuumeinrichtung |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110255999A1 (de) |
EP (1) | EP2310632A1 (de) |
JP (1) | JP2011530053A (de) |
CN (1) | CN102105653B (de) |
DE (1) | DE102008036623A1 (de) |
WO (1) | WO2010015501A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202012000611U1 (de) * | 2012-01-21 | 2013-04-23 | Oerlikon Leybold Vacuum Gmbh | Turbomolekularpumpe |
CN203926077U (zh) * | 2014-07-10 | 2014-11-05 | 讯豪电子(昆山)有限公司 | 无轴风扇的改良结构 |
CN110219992A (zh) * | 2019-07-09 | 2019-09-10 | 大连保税区华鸿工业技术有限公司 | 防止密封面损伤的密封装置 |
US11519419B2 (en) | 2020-04-15 | 2022-12-06 | Kin-Chung Ray Chiu | Non-sealed vacuum pump with supersonically rotatable bladeless gas impingement surface |
US11306780B1 (en) * | 2021-03-02 | 2022-04-19 | Aktiebolaget Skf | Bearing assembly with lubricant retainers |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB809443A (en) * | 1954-02-27 | 1959-02-25 | Heraeus Gmbh W C | Improvements in or relating to rotary high-vacuum pumps |
US3347604A (en) * | 1964-02-19 | 1967-10-17 | Ion Physics Corp | High vacuum rotary seal and bearing combination |
GB1537123A (en) * | 1975-03-22 | 1978-12-29 | Kernforschungsanlage Juelich | Turbo-molecular pumps |
US4512725A (en) * | 1982-02-16 | 1985-04-23 | Compagnie Industrielle Des Telecommunications Cit-Alcatel | Rotary vacuum pump |
US20060245960A1 (en) * | 2003-04-29 | 2006-11-02 | Schooling Jennifer M | Vacuum pump |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4180370A (en) * | 1975-03-22 | 1979-12-25 | Kernforschungsanlage Julich Gesellschaft Mit Beschrankter Haftung | Turbomolecular pump |
US5653541A (en) * | 1994-08-17 | 1997-08-05 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Disk driving motor |
JPH08135667A (ja) * | 1994-11-14 | 1996-05-31 | Nippon Seiko Kk | 転がり軸受用密封装置 |
JPH1151069A (ja) * | 1997-07-31 | 1999-02-23 | Minebea Co Ltd | ダブルシールベアリング |
DE19824022C2 (de) * | 1998-05-29 | 2003-10-30 | Skf Gmbh | Wälzlager mit Strombrücke |
JP2000087986A (ja) * | 1998-09-09 | 2000-03-28 | Nippon Seiko Kk | 転がり軸受 |
US6179472B1 (en) * | 1998-10-13 | 2001-01-30 | International Business Machines Corporation | Ball bearing oil/grease loss containment method |
JP2002054637A (ja) * | 2000-03-30 | 2002-02-20 | Nsk Ltd | 転動装置 |
JP2002266880A (ja) * | 2001-03-05 | 2002-09-18 | Minebea Co Ltd | 玉軸受のシール構造 |
US6470666B1 (en) * | 2001-04-30 | 2002-10-29 | General Electric Company | Methods and systems for preventing gas turbine engine lube oil leakage |
DE10234935A1 (de) * | 2001-07-31 | 2003-05-15 | Nsk Ltd | Ringsschrägkugellager und Spindelvorrichtung |
AU2003220844A1 (en) * | 2002-02-27 | 2003-09-09 | Nsk Ltd. | Rolling bearing |
DE10256086A1 (de) * | 2002-11-29 | 2004-06-17 | Leybold Vakuum Gmbh | Kugellager und mit einem Lager dieser Art ausgerüstete Vakuumpumpe |
US20040175065A1 (en) * | 2003-03-07 | 2004-09-09 | Minebea Co., Ltd. | Ball bearing assembly utilizing a labyrinth seal |
FR2859250B1 (fr) * | 2003-08-29 | 2005-11-11 | Cit Alcatel | Pompe a vide |
DE602004024052D1 (de) * | 2004-07-20 | 2009-12-24 | Varian Spa | Ringförmiger Laufstützkörper für Wälzlagern |
DE102005025261A1 (de) * | 2005-06-02 | 2006-12-14 | Leybold Vacuum Gmbh | Vakuumpumpe |
DE102006032765A1 (de) * | 2006-07-14 | 2008-01-17 | Leybold Vacuum Gmbh | Vakuumpumpe |
-
2008
- 2008-08-06 DE DE102008036623A patent/DE102008036623A1/de not_active Withdrawn
-
2009
- 2009-07-17 JP JP2011521509A patent/JP2011530053A/ja active Pending
- 2009-07-17 CN CN2009801295303A patent/CN102105653B/zh not_active Expired - Fee Related
- 2009-07-17 US US13/057,320 patent/US20110255999A1/en not_active Abandoned
- 2009-07-17 WO PCT/EP2009/059245 patent/WO2010015501A1/de active Application Filing
- 2009-07-17 EP EP09780783A patent/EP2310632A1/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB809443A (en) * | 1954-02-27 | 1959-02-25 | Heraeus Gmbh W C | Improvements in or relating to rotary high-vacuum pumps |
US3347604A (en) * | 1964-02-19 | 1967-10-17 | Ion Physics Corp | High vacuum rotary seal and bearing combination |
GB1537123A (en) * | 1975-03-22 | 1978-12-29 | Kernforschungsanlage Juelich | Turbo-molecular pumps |
US4512725A (en) * | 1982-02-16 | 1985-04-23 | Compagnie Industrielle Des Telecommunications Cit-Alcatel | Rotary vacuum pump |
US20060245960A1 (en) * | 2003-04-29 | 2006-11-02 | Schooling Jennifer M | Vacuum pump |
Also Published As
Publication number | Publication date |
---|---|
JP2011530053A (ja) | 2011-12-15 |
US20110255999A1 (en) | 2011-10-20 |
DE102008036623A1 (de) | 2010-02-11 |
EP2310632A1 (de) | 2011-04-20 |
CN102105653B (zh) | 2013-09-04 |
CN102105653A (zh) | 2011-06-22 |
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