DE202005019644U1 - Turbo molecular pump, with a main inflow and at least one intermediate inflow, has a floating rotor supported by active magnet radial and radial-axial bearings - Google Patents
Turbo molecular pump, with a main inflow and at least one intermediate inflow, has a floating rotor supported by active magnet radial and radial-axial bearings Download PDFInfo
- Publication number
- DE202005019644U1 DE202005019644U1 DE200520019644 DE202005019644U DE202005019644U1 DE 202005019644 U1 DE202005019644 U1 DE 202005019644U1 DE 200520019644 DE200520019644 DE 200520019644 DE 202005019644 U DE202005019644 U DE 202005019644U DE 202005019644 U1 DE202005019644 U1 DE 202005019644U1
- Authority
- DE
- Germany
- Prior art keywords
- radial
- pump
- inflow
- section
- sections
- 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
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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
- 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
- F04D19/046—Combinations of two or more different types of 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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
Abstract
Description
Die Erfindung bezieht sich auf eine Turbomolekularpumpe mit einem Haupteinlass und mindestens einem Zwischeneinlass.The The invention relates to a turbomolecular pump having a main inlet and at least one intermediate intake.
Eine Turbomolekularpumpe mit einem Haupteinlass und mindestens einem Zwischeneinlass weist einen Turbo-Abschnitt vor und mindestens einen Pump-Abschnitt hinter dem Zwischeneinlass auf. Der Pumpenrotor wird durch ein mechanisches Radial-Lager und ein mechanisches Radial-Axial-Lager gelagert. Es besteht der Wunsch, derartige Turbomolekularpumpen mit immer höheren Gasdurchsätzen und mit immer höheren Kompressionsvermögen zu betreiben.A Turbomolecular pump with a main inlet and at least one Intermediate inlet has a turbo section and at least one Pump section behind to the intermediate inlet. The pump rotor is powered by a mechanical radial bearing and a mechanical radial-axial bearing stored. It consists of Desire to such turbomolecular pumps with ever higher gas flow rates and with ever higher compressibility to operate.
Durch die hierdurch zwangsläufig zunehmende Reibung in den mechanischen Lagern erhöht sich die Eigenerwärmung und damit die Betriebstemperatur der Turbomolekularpumpe. Es wird dadurch die Gefahr erhöht, dass das tribologische System der mechanisch gelagerten Turbomolekularpumpe durch den temperaturbedingt erhöhten Verschleiß relativ früh versagt. Hinzu tritt, dass die Pumpenrotoren und Pumpenstatoren einer Turbomolekularpumpe zur Erhaltung eines günstigen Wirkungsgrades ausgesprochen engspaltig konstruiert sind, was eine Minimierung der Eigenerwärmung erfordert.By the inevitable increasing friction in the mechanical bearings increases the self-heating and thus the operating temperature of the turbomolecular pump. It will thereby increasing the risk that the tribological system of the mechanically stored turbomolecular pump increased by the temperature Wear failed relatively early. In addition, the pump rotors and pump stators of a turbomolecular pump to maintain a favorable Effizienzes are designed extremely narrow column, what a Minimization of self-heating requires.
Aufgabe der Erfindung ist es, die Zuverlässigkeit einer Turbomolekularpumpe mit einem Haupteinlass und mindestens einem Zwischeneinlass zu erhöhen.task The invention is the reliability a turbomolecular pump having a main inlet and at least to increase an intermediate intake.
Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Anspruchs 1 gelöst.These Task is according to the invention with the Characteristics of claim 1 solved.
Bei der erfindungsgemäßen Turbomolekularpumpe sind sowohl das Radial-Lager als auch das Radial-Axial-Lager als aktive Magnet-Lager ausgebildet. Die gesamte 5-achsige Lagerung des Rotors erfolgt im Normalfall berührungslos, nur bei Störungen übernehmen mechanische Fanglager vorübergehend die Lagerung. Hierdurch wird gerade bei zunehmenden Gasdurchsätzen und höheren Kompressionen und damit höheren Drücken die lagerungsbedingte Erwärmung auf ein technisch unvermeidbares Minimum reduziert. Zum einen wird die durch überhöhte Temperaturen bedingte Alterung und Schwächung aller Bauteile der Turbomolekularpumpe erheblich reduziert. Zum anderen unterliegen die aktiven Magnet-Lager keiner mit mechanischen Wälzlagern vergleichbaren Alterung bzw. Abnutzung. Die Zuverlässigkeit und die Lebensdauer einer Turbomolekularpumpe mit einem Haupteinlass und einem Nebeneinlass werden auf diese Weise erheblich erhöht.at the turbomolecular pump according to the invention are both the radial bearing and the radial-axial bearing as formed active magnetic bearing. The entire 5-axis storage The rotor is usually contactless, only take over in case of faults mechanical fishing camp temporarily warehousing. This is just with increasing gas flow rates and higher Compressions and thus higher To press the storage-related warming reduced to a technically unavoidable minimum. For one thing due to excessive temperatures conditional aging and weakening all components of the turbomolecular pump significantly reduced. To the Others, the active magnetic bearings are not subject to any mechanical roller bearings comparable aging or wear. The reliability and the life of a turbomolecular pump with a main inlet and a sideline are significantly increased in this way.
Vorzugsweise ist der Rotor fliegend gelagert. Der fliegend angeordnete Teil des Rotors sind vorzugsweise die beiden Turbo-Abschnitte des Rotors. Mit dieser Anordnung wird unter anderem vermieden, dass der Einlassquerschnitt des Haupteinlasses durch ein relativ viel Bauraum erforderndes Magnet-Lager verkleinert wird.Preferably the rotor is cantilevered. The flying part of the Rotors are preferably the two turbo sections of the rotor. With This arrangement is avoided, inter alia, that the inlet cross-section the main inlet by a relatively large amount of space requiring magnetic bearing is reduced.
Gemäß einer bevorzugten Ausgestaltung sind zwei weitere Pump-Abschnitte vorgesehen, und sind die Lager zwischen den ersten beiden und den beiden folgenden Pump-Abschnitten angeordnet. Zu beiden Längsseiten der Lager sind also jeweils zwei oder mehr Pump-Abschnitte des Rotors fliegend gelagert. Auf diese Weise kann mit relativ geringem Lagerungsaufwand eine Turbomolekularpumpe mit vier oder mehr Pump-Abschnitten realisiert werden.According to one preferred embodiment, two further pump sections are provided, and are the bearings between the first two and the two following Arranged pumping sections. On both sides of the bearings are so each two or more pumping sections of the rotor stored on the fly. In this way, with a relatively low storage costs a Turbomolecular pump realized with four or more pump sections become.
Vorzugsweise sind alle Lager, also die beiden Axiallager sowie das Radial-Lager, in einer Lagerkartusche angeordnet. Die Lagerkartusche erleichtert die Montage der Turbomolekularpumpe, da die gesamte Lagerung sowie der elektrische Antrieb in der Lagerkartusche komplett vormontiert sind, bevor die Lagerkartusche zusammen mit dem Rotor in das Turbomolekularpumpen-Gehäuse eingebaut wird.Preferably are all bearings, so the two thrust bearings and the radial bearing, arranged in a storage cartridge. The storage cartridge facilitates the assembly of the turbomolecular pump, since the entire storage as well the electric drive in the bearing cartridge is completely pre-assembled before the bearing cartridge is installed in the turbomolecular pump housing together with the rotor.
Gemäß einer bevorzugten Ausgestaltung folgt dem letzten Turbo-Abschnitt ein Pump-Abschnitt, der nicht nach dem Axialverdichter-Prinzip arbeitet. Dieser Pump-Abschnitt kann beispielsweise ein Holweck-Abschnitt sein und hat im Bereich des Vorvakuums gegenüber Turbo-Abschnitten bessere Verdichtungseigenschaften, so dass mit einer einzigen Pumpe auf relativ hohe Auslass-Drücke komprimiert wird.According to one preferred embodiment follows the last turbo section Pump section that does not work on the axial compressor principle. For example, this pump section may be a Holweck section and has better compression properties in the area of the fore-vacuum compared to turbo-sections, so that with a single pump compressed to relatively high outlet pressures becomes.
Gemäß einer bevorzugten Ausgestaltung ist zwischen allen Pump-Abschnitten jeweils ein Zwischeneinlass vorgesehen. Auf diese Weise wird eine Turbomolekularpumpe geschaffen, die zwei oder mehr Druckniveaus an ihren Einlässen zur Verfügung stellen kann.According to one preferred embodiment is between all pump sections respectively an intermediate inlet provided. In this way, a turbomolecular pump created two or more pressure levels at their inlets Make available can.
Im Folgenden werden unter Bezugnahme auf die Zeichnungen zwei Ausführungsbeispiele der Erfindung näher erläutert.in the Two embodiments will now be described with reference to the drawings closer to the invention explained.
Es zeigen:It demonstrate:
In
der
Die
Turbomolekularpumpe
Die
Lagerkartusche
Die
Lagerung wird gebildet von zwei aktiven magnetischen Radial-Lagern
Die
beiden Pump-Abschnitte
Der
Pumpenrotor
In
Zwischen
jedem der fünf
Abschnitte
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200520019644 DE202005019644U1 (en) | 2005-12-16 | 2005-12-16 | Turbo molecular pump, with a main inflow and at least one intermediate inflow, has a floating rotor supported by active magnet radial and radial-axial bearings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200520019644 DE202005019644U1 (en) | 2005-12-16 | 2005-12-16 | Turbo molecular pump, with a main inflow and at least one intermediate inflow, has a floating rotor supported by active magnet radial and radial-axial bearings |
Publications (1)
Publication Number | Publication Date |
---|---|
DE202005019644U1 true DE202005019644U1 (en) | 2007-04-26 |
Family
ID=38038097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200520019644 Expired - Lifetime DE202005019644U1 (en) | 2005-12-16 | 2005-12-16 | Turbo molecular pump, with a main inflow and at least one intermediate inflow, has a floating rotor supported by active magnet radial and radial-axial bearings |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE202005019644U1 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008024764A1 (en) * | 2008-05-23 | 2009-11-26 | Oerlikon Leybold Vacuum Gmbh | Multi-stage vacuum pump |
DE102008035891A1 (en) | 2008-07-31 | 2010-02-04 | Oerlikon Leybold Vacuum Gmbh | vacuum pump |
DE102008061805A1 (en) * | 2008-12-11 | 2010-06-17 | Oerlikon Leybold Vacuum Gmbh | Vacuum pump e.g. turbomolecular pump, has rotor shaft part with set of individual shafts connected with each other by coupling device, where individual shafts are coaxially arranged and support pump elements |
WO2010105908A1 (en) * | 2009-03-19 | 2010-09-23 | Oerlikon Leybold Vacuum Gmbh | Multi-inlet vacuum pump |
DE102009055888A1 (en) | 2009-11-26 | 2011-06-01 | Oerlikon Leybold Vacuum Gmbh | vacuum pump |
EP2706237A2 (en) | 2012-09-10 | 2014-03-12 | Pfeiffer Vacuum GmbH | Vacuum pump |
EP2295813A3 (en) * | 2009-08-01 | 2015-08-19 | Pfeiffer Vacuum GmbH | Turbomolecular pump rotor |
EP2902637A3 (en) * | 2014-02-03 | 2015-09-02 | Pfeiffer Vacuum GmbH | Vacuum pump |
EP2886870B1 (en) | 2013-12-18 | 2017-12-20 | Pfeiffer Vacuum GmbH | Vacuum pump with improved inlet geometry |
DE102013112185B4 (en) | 2013-11-06 | 2022-04-14 | Pfeiffer Vacuum Gmbh | Vacuum pump and vacuum pump with at least one turbomolecular pump stage |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4022523A1 (en) * | 1990-07-16 | 1992-01-23 | Pfeiffer Vakuumtechnik | DEVICE FOR FLOODING FAST-ROTATING VACUUM PUMPS |
DE19508566A1 (en) * | 1995-03-10 | 1996-09-12 | Balzers Pfeiffer Gmbh | Molecular vacuum pump with cooling gas device and method for its operation |
DE19804768A1 (en) * | 1998-02-06 | 1999-08-12 | Pfeiffer Vacuum Gmbh | Thermal expansion compensation system for rotor bearings in a gas friction pump |
DE19821634A1 (en) * | 1998-05-14 | 1999-11-18 | Leybold Vakuum Gmbh | Friction vacuum pump with staged rotor and stator |
-
2005
- 2005-12-16 DE DE200520019644 patent/DE202005019644U1/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4022523A1 (en) * | 1990-07-16 | 1992-01-23 | Pfeiffer Vakuumtechnik | DEVICE FOR FLOODING FAST-ROTATING VACUUM PUMPS |
DE19508566A1 (en) * | 1995-03-10 | 1996-09-12 | Balzers Pfeiffer Gmbh | Molecular vacuum pump with cooling gas device and method for its operation |
DE19804768A1 (en) * | 1998-02-06 | 1999-08-12 | Pfeiffer Vacuum Gmbh | Thermal expansion compensation system for rotor bearings in a gas friction pump |
DE19821634A1 (en) * | 1998-05-14 | 1999-11-18 | Leybold Vakuum Gmbh | Friction vacuum pump with staged rotor and stator |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008024764A1 (en) * | 2008-05-23 | 2009-11-26 | Oerlikon Leybold Vacuum Gmbh | Multi-stage vacuum pump |
US8814542B2 (en) | 2008-07-31 | 2014-08-26 | Oerlikon Leybold Vacuum Gmbh | Vacuum pump |
DE102008035891A1 (en) | 2008-07-31 | 2010-02-04 | Oerlikon Leybold Vacuum Gmbh | vacuum pump |
DE102008061805A1 (en) * | 2008-12-11 | 2010-06-17 | Oerlikon Leybold Vacuum Gmbh | Vacuum pump e.g. turbomolecular pump, has rotor shaft part with set of individual shafts connected with each other by coupling device, where individual shafts are coaxially arranged and support pump elements |
WO2010105908A1 (en) * | 2009-03-19 | 2010-09-23 | Oerlikon Leybold Vacuum Gmbh | Multi-inlet vacuum pump |
US8992162B2 (en) | 2009-03-19 | 2015-03-31 | Oerlikon Leybold Vacuum Gmbh | Multi-inlet vacuum pump |
EP2295813A3 (en) * | 2009-08-01 | 2015-08-19 | Pfeiffer Vacuum GmbH | Turbomolecular pump rotor |
DE102009055888A1 (en) | 2009-11-26 | 2011-06-01 | Oerlikon Leybold Vacuum Gmbh | vacuum pump |
EP2333344A2 (en) | 2009-11-26 | 2011-06-15 | Oerlikon Leybold Vacuum GmbH | Vacuum pump |
DE102012108394A1 (en) | 2012-09-10 | 2014-03-13 | Pfeiffer Vacuum Gmbh | vacuum pump |
US20140072408A1 (en) * | 2012-09-10 | 2014-03-13 | Pfeiffer Vacuum Gmbh | Vacuum pump |
EP2706237A2 (en) | 2012-09-10 | 2014-03-12 | Pfeiffer Vacuum GmbH | Vacuum pump |
US9453514B2 (en) * | 2012-09-10 | 2016-09-27 | Pfeiffer Vacuum Gmbh | Vacuum pump having fastening element for securing rotor part to rotor shaft and deformed safety element projecting in axial direction for preventing relative rotation between the rotor part and rotor shaft |
DE102013112185B4 (en) | 2013-11-06 | 2022-04-14 | Pfeiffer Vacuum Gmbh | Vacuum pump and vacuum pump with at least one turbomolecular pump stage |
EP2886870B1 (en) | 2013-12-18 | 2017-12-20 | Pfeiffer Vacuum GmbH | Vacuum pump with improved inlet geometry |
EP2902637A3 (en) * | 2014-02-03 | 2015-09-02 | Pfeiffer Vacuum GmbH | Vacuum pump |
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Legal Events
Date | Code | Title | Description |
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R163 | Identified publications notified | ||
R207 | Utility model specification |
Effective date: 20070531 |
|
R150 | Term of protection extended to 6 years |
Effective date: 20081212 |
|
R151 | Term of protection extended to 8 years | ||
R151 | Term of protection extended to 8 years |
Effective date: 20120118 |
|
R152 | Term of protection extended to 10 years |
Effective date: 20140116 |
|
R071 | Expiry of right |