EP1580435A2 - Turbomolekularpumpe - Google Patents
Turbomolekularpumpe Download PDFInfo
- Publication number
- EP1580435A2 EP1580435A2 EP05003720A EP05003720A EP1580435A2 EP 1580435 A2 EP1580435 A2 EP 1580435A2 EP 05003720 A EP05003720 A EP 05003720A EP 05003720 A EP05003720 A EP 05003720A EP 1580435 A2 EP1580435 A2 EP 1580435A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- blades
- turbomolecular pump
- vacuum side
- angle
- attack
- 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
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
- F04D19/042—Turbomolecular vacuum 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/321—Rotors specially for elastic fluids for axial flow pumps for axial flow compressors
- F04D29/324—Blades
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
- F04D29/544—Blade shapes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/70—Shape
Definitions
- the invention relates to a turbomolecular pump having a plurality of alternating axially successively arranged and provided with blades Rotor and stator discs, with the blades towards the High vacuum side have a steeper angle of attack than the blades in Direction vacuum side.
- the invention relates to a method for producing a Bladed rotor or stator of such a turbomolecular pump.
- turbomolecular pumps are known, for example by the DE 2 035 063 B3 or DE 27 17 366 B2.
- the blades shown there have the shape of a parallelogram in cross section. The angle of attack is depending on the axial position of the blades 25 ° to 40 °.
- DE 101 03 230 A1 discloses a turbomolecular pump in which the blade in cross section deviates strongly from a parallelogram and in has approximately an airfoil shape.
- the mean angle of attack is about 45 °.
- a turbomolecular pump is known in which the Blades of a first, suction side arranged group of blades, called suction group A, an angle of attack of 30 ° to 40 ° and the blades a second group, called compression group B, consisting of the remaining blade stages have an angle of 17 ° to 30 °.
- the second group, compression group can be divided into two subgroups be whose blades have a pitch of 25 ° to 30 ° respectively from 17 ° to 25 °.
- the pump-active components of a turbomolecular pump consist of the with Blades provided rotor and stator discs, which alternately axially arranged one behind the other. Through the interaction of these discs In a known manner, the pumping effect is generated.
- the characteristic features of a turbomolecular pump are Compression and absorbency. Both properties are mainly determined by the following parameters: The peripheral speed of the Blade ring of the rotor disks, the number of blades, the angle of attack the blades and the gradation of the different slices of the entire disc package. Within the gradation, the shrink Angle of attack of the blade from the intake opening to the gas outlet opening.
- the invention is the technical problem underlying, a turbomolecular pump in such a way that heat and power consumption are reduced and a good pre-vacuum compatibility as well as compression are created.
- This technical problem is due to a substantial reduction of the Angle of attack of the blades in the compression or exhaust stage, and that is the angle of attack of the blades to the vacuum side less than 8 °.
- the flatter formation of the angle of attack has a number of positive ones Impact: Initially decreases at the same coverage ratio despite small disc height, the number of blades per disc. Furthermore vortex formations are avoided in the high pressure range, which causes it to a reduction in the recording power and heat generation comes.
- the low disc and blade height leads to a lower burst rate of Molecules and thus to less losses and finally to a low Overall length of the pump.
- the reduction in the number of teeth leads to a further reduction of the compression power.
- a further increase of the aforementioned advantages can be achieved if the angle of attack of the blades to the vacuum side is less than 6 °.
- the benefits are particularly pronounced when in extreme cases the Incident angle of the blades to the vacuum side is even less than 5 °.
- Incidence angle of the blades to the vacuum side towards 5.9 ° to 4.6 °.
- the reduction of the disc height means that the axial thickness of the Blades smaller than 5.0 millimeters, in particular equal to or smaller 4.5 millimeters and in extreme cases even reduced to 3.0 to 4.5 millimeters is.
- the blades in the Have cross-section at least approximately the shape of a parallelogram.
- the turbomolecular pump (T) comprises a housing (1) on which on the one hand a suction flange (2) formed on the other hand a Exhaust flange (3) is mounted.
- the housing (1) has a rotor shaft (4) Rolling bearings (5, 6) rotatably mounted.
- the rotor shaft (4) is connected via a electromotive drive (7) in high-speed rotation. Act here the on the rotor shaft (4) fixed rotor discs (8) with those in the housing (1) inserted stator discs (9) together.
- the angle of attack is ⁇ drawn in Fig. 2 the clearer representation because of greatly enlarged.
- the Slice thickness (D) is between 3.0 millimeters and 4.5 millimeters.
- the blade (10) has a cross-section which is at least approximately a trapezoidal shape having.
- the blade (10) is removed without pressure.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Non-Positive Displacement Air Blowers (AREA)
Abstract
Description
- 1
- Gehäuse
- 2
- Ansaugflansch
- 3
- Ausstoßflansch
- 4
- Rotorwelle
- 5
- Wälzlager
- 6
- Wälzlager
- 7
- Antrieb
- 8
- Rotorscheibe
- 9
- Statorscheibe
- 10
- Schaufel
- T
- Turbomolekularpumpe
- D
- Scheibendicke
- α
- Anstellwinkel der Schaufel
Claims (9)
- Turbomolekularpumpe mit einer Mehrzahl von abwechselnd axial hintereinander angeordneten, mit Schaufeln (10) versehenen Rotor- und Statorscheiben (8, 9), wobei die Schaufeln (10) zur Hochvakuumseite (2) hin einen steileren Anstellwinkel α aufweisen als die Schaufeln (10) zur Vakuumseite (3) hin, dadurch gekennzeichnet, dass der Anstellwinkel α der Schaufeln (10) zur Vakuumseite (3) hin weniger als 8° beträgt.
- Turbomolekularpumpe nach Anspruch 1, dadurch gekennzeichnet, dass der Anstellwinkel α der Schaufeln (10) zur Vakuumseite (3) hin weniger als 6° beträgt.
- Turbomolekularpumpe nach Anspruch 2, dadurch gekennzeichnet, dass der Anstellwinkel α der Schaufeln (10) zur Vakuumseite (3) hin weniger als 5° beträgt.
- Turbomolekularpumpe nach Anspruch 2 und 3, dadurch gekennzeichnet, dass der Anstellwinkel α der Schaufeln (10) zur Vakuumseite (3) hin 5,9° bis 4,6° beträgt.
- Turbomolekularpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die axiale Dicke (D) der Schaufeln (10) kleiner als 5 Millimeter ist.
- Turbomolekularpumpe nach Anspruch 5, dadurch gekennzeichnet, dass die axiale Dicke (D) der Schaufeln (10) gleich oder kleiner 4,5 Millimeter ist.
- Turbomolekularpumpe nach Anspruch 6, dadurch gekennzeichnet, dass die axiale Dicke (D) der Schaufeln (10) 3,0 bis 4,5 Millimeter ist.
- Turbomolekularpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Schaufeln (10) im Querschnitt mindestens in etwa die Form eines Parallelogramms aufweisen.
- Verfahren zur Herstellung einer mit Schaufeln (10) versehenen Rotor- oder Statorscheibe (8, 9) einer Turbomolekularpumpe (T) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass als Fertigungsverfahren das so genannte High-Speed-Cutting angewendet wird, bei dem das Material ohne Druck abgetragen wird.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004012713 | 2004-03-16 | ||
| DE102004012713A DE102004012713A1 (de) | 2004-03-16 | 2004-03-16 | Turbomolekularpumpe |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| EP1580435A2 true EP1580435A2 (de) | 2005-09-28 |
| EP1580435A3 EP1580435A3 (de) | 2009-12-30 |
| EP1580435B1 EP1580435B1 (de) | 2011-08-31 |
| EP1580435B2 EP1580435B2 (de) | 2020-11-18 |
Family
ID=34853986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05003720.9A Expired - Lifetime EP1580435B2 (de) | 2004-03-16 | 2005-02-22 | Turbomolekularpumpe |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8398362B2 (de) |
| EP (1) | EP1580435B2 (de) |
| JP (1) | JP2005264932A (de) |
| AT (1) | ATE522725T1 (de) |
| DE (1) | DE102004012713A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3002459A1 (de) * | 2014-10-02 | 2016-04-06 | Pfeiffer Vacuum GmbH | Verfahren zur herstellung einer rotor- oder statorscheibe für eine vakuumpumpe sowie rotor- oder statorscheibe für eine vakuumpumpe |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2088327B1 (de) * | 2008-02-11 | 2011-08-31 | Agilent Technologies Italia S.p.A. | Stütze für Wälzlager |
| GB2498816A (en) | 2012-01-27 | 2013-07-31 | Edwards Ltd | Vacuum pump |
| GB2612781B (en) * | 2021-11-10 | 2024-04-10 | Edwards Ltd | Turbomolecular pump bladed disc |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE757354A (fr) † | 1969-10-27 | 1971-03-16 | Sargent Welch Scientific Co | Pompe turbomoleculaire a stators et rotors perfectionnes |
| DE2035063C3 (de) * | 1970-07-15 | 1974-05-30 | Arthur Pfeiffer-Vakuumtechnik Gmbh, 6330 Wetzlar | Laufrad für eine Turbomolekularpumpe |
| DE7237362U (de) * | 1972-10-12 | 1973-01-11 | Leybold Heraeus Gmbh & Co Kg | Turbomolekularvakuumpumpe |
| CH557468A (de) * | 1973-04-30 | 1974-12-31 | Bbc Brown Boveri & Cie | Turbine axialer bauart. |
| US3969039A (en) † | 1974-08-01 | 1976-07-13 | American Optical Corporation | Vacuum pump |
| DE2654055B2 (de) * | 1976-11-29 | 1979-11-08 | Kernforschungsanlage Juelich Gmbh, 5170 Juelich | Rotor- und Statorscheibe für Turbomolekularpumpe |
| JPS5898696A (ja) * | 1981-12-09 | 1983-06-11 | Hitachi Ltd | 分子ポンプのステ−タ |
| DE3402549A1 (de) * | 1984-01-26 | 1985-08-01 | Leybold-Heraeus GmbH, 5000 Köln | Molekularvakuumpumpe |
| JPS6125993A (ja) * | 1984-07-13 | 1986-02-05 | Ulvac Corp | タ−ボ分子ポンプ |
| JPS61123797A (ja) * | 1984-11-19 | 1986-06-11 | Mitsubishi Heavy Ind Ltd | 高真空排気装置 |
| JPH0261387A (ja) * | 1988-08-24 | 1990-03-01 | Seiko Seiki Co Ltd | ターボ分子ポンプ |
| JPH02201100A (ja) * | 1989-01-20 | 1990-08-09 | Ntn Corp | ターボ分子ポンプ |
| JP2865888B2 (ja) * | 1991-03-05 | 1999-03-08 | 日本原子力研究所 | マルチターボ型真空ポンプ |
| US5358373A (en) * | 1992-04-29 | 1994-10-25 | Varian Associates, Inc. | High performance turbomolecular vacuum pumps |
| JP3898785B2 (ja) * | 1996-09-24 | 2007-03-28 | 株式会社日立製作所 | 高低圧一体型蒸気タービン用動翼と高低圧一体型蒸気タービン及びコンバインド発電システム並びに複合発電プラント |
| JP3047292B1 (ja) * | 1998-11-24 | 2000-05-29 | セイコー精機株式会社 | ターボ分子ポンプ及び真空装置 |
| JP2001132683A (ja) * | 1999-10-29 | 2001-05-18 | Applied Materials Inc | ターボ分子ポンプ |
| DE10046506A1 (de) * | 2000-09-20 | 2002-03-28 | Leybold Vakuum Gmbh | Turbomolekularvakuumpumpe mit Rotorschaufelreihen und Statorschaufelreihen |
| DE10103230A1 (de) * | 2001-01-25 | 2002-08-01 | Leybold Vakuum Gmbh | Turbomolekularvakuumpumpe mit Rotor-und Statorschaufeln |
| EP1249613B1 (de) * | 2001-03-15 | 2004-01-28 | VARIAN S.p.A. | Turbinenpumpe mit einer Statorstufe integriert mit einem Distanzring |
| JP3978001B2 (ja) * | 2001-06-29 | 2007-09-19 | 三菱重工業株式会社 | ターボ分子ポンプ |
| US6760971B2 (en) * | 2002-07-15 | 2004-07-13 | Pratt & Whitney Canada Corp. | Method of making a gas turbine engine diffuser |
-
2004
- 2004-03-16 DE DE102004012713A patent/DE102004012713A1/de not_active Withdrawn
-
2005
- 2005-02-22 EP EP05003720.9A patent/EP1580435B2/de not_active Expired - Lifetime
- 2005-02-22 AT AT05003720T patent/ATE522725T1/de active
- 2005-03-03 JP JP2005058364A patent/JP2005264932A/ja active Pending
- 2005-03-14 US US11/079,649 patent/US8398362B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3002459A1 (de) * | 2014-10-02 | 2016-04-06 | Pfeiffer Vacuum GmbH | Verfahren zur herstellung einer rotor- oder statorscheibe für eine vakuumpumpe sowie rotor- oder statorscheibe für eine vakuumpumpe |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE522725T1 (de) | 2011-09-15 |
| EP1580435A3 (de) | 2009-12-30 |
| JP2005264932A (ja) | 2005-09-29 |
| DE102004012713A1 (de) | 2005-10-06 |
| EP1580435B2 (de) | 2020-11-18 |
| US20050207884A1 (en) | 2005-09-22 |
| US8398362B2 (en) | 2013-03-19 |
| EP1580435B1 (de) | 2011-08-31 |
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