EP1598558A1 - Ölgedichtete Drehschiebervakuumpumpe - Google Patents
Ölgedichtete Drehschiebervakuumpumpe Download PDFInfo
- Publication number
- EP1598558A1 EP1598558A1 EP05008941A EP05008941A EP1598558A1 EP 1598558 A1 EP1598558 A1 EP 1598558A1 EP 05008941 A EP05008941 A EP 05008941A EP 05008941 A EP05008941 A EP 05008941A EP 1598558 A1 EP1598558 A1 EP 1598558A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil
- vacuum pump
- rotary vane
- vane vacuum
- shaft
- 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
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Classifications
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- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
- F04C18/3442—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the inlet and outlet opening
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- 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
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- 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/0085—Prime movers
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- 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
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/70—Safety, emergency conditions or requirements
- F04C2270/701—Cold start
Definitions
- the invention relates to an oil-sealed rotary vane vacuum pump after Generic term of the first claim.
- Rotary vane vacuum pumps play an important role in the generation of vacuum. They are used to generate coarse and fine vacuum with final pressures of up to approx. 6 * 10 -3 mbar and are used in industry, research and laboratories. Traditionally, these pumps also serve as a backing pump for non-atmospheric pressure pumps such as Roots pumps and turbomolecular pumps. Depending on the application, they are designed in one or more stages.
- Rotary vane vacuum pumps of the present type belong to the class of oil superposed positive displacement pumps. The oil in the pump performs a number of tasks, including on the one hand the sealing of the gas outlet against the gas inlet side. On the other hand, the oil is used for cooling and lubricating the mechanical components of the pump.
- the oil also plays a negative role in the design of the drive motor.
- the oil is tough and viscous. This requires a lot of power on the side of the drive motor in order to turn the rotor of the pump.
- insufficient dimensioning ie, too low a torque of the drive motor, it may even happen that the pump does not even start up.
- Remedy can provide the choice of an oil with higher viscosity, however, such oils have volatile constituents, so that the final pressure increases (Wutz: "Handbook Vacuum Technology", Vieweg-Verlag, 8th edition, p 202 ff).
- the drive motors are designed very powerful in oil-lubricated rotary vane vacuum pumps.
- Prior art rotary vane vacuum pumps of the prior art are equipped with asynchronous AC electric motors. Their typical torque as a function of the rotational speed is shown in FIG. At low speeds, the torque is low, the much higher maximum torque is achieved only at medium speeds. At higher speeds, the torque drops again.
- This situation requires that the drive motors must be oversized, so that the rotary vane vacuum pumps can even start. This oversizing causes an unnecessarily high power consumption of the drive and thereby increases both the manufacturing costs, as well as the operating costs of the pump. The latter play an increasing role, as rotary vane vacuum pumps are designed for continuous operation.
- the prior art rotary vane vacuum pumps are equipped with magnetic coupling and split pot, which leads to an increase in manufacturing costs while reducing operating costs.
- the drive system of a rotary vane vacuum pump has at least two shafts, namely rotor shaft and motor shaft. Both must be stored, also coupling elements between the waves are needed. These measures increase the number of components, the assembly costs and the error rate of the pump.
- the invention is therefore based on the object, an oil-sealed Rotary vane vacuum pump to build, which has the disadvantages of the prior art overcomes.
- the oil-sealed rotary vane vacuum pump is driven by a brushless DC motor.
- This consists of permanent magnets, which are mounted on the shaft of the pumping system, and stationary coils, which are controlled by an electronics.
- These motors have a very even course of torque as a function of speed and angle of rotation. Even at very low speeds almost the full torque is applied as starting torque. In this way, a motor can be used, which has a significantly lower power consumption compared to an asynchronous AC motor with the same starting torque. Therefore, the entire engine is structurally smaller, so the pump can be made more compact.
- the torque which is more uniform with respect to the rotation, ensures significantly smoother running, which has a very positive effect on vibration and noise development.
- the rotary vane vacuum pump according to the invention requires only a single shaft, whereby manufacturing costs and susceptibility to errors are reduced.
- FIG. 1 shows an oil-sealed rotary vane vacuum pump 1 with housing 2, gas inlet 3 and gas outlet 4.
- the pumping system 5 is provided with a shaft 12 which is mounted in the bearings 13.
- the pumping action results from the rotation of the shaft in conjunction with the rotary valves 7.
- a hydraulic oil pump 6 supplies the bearings, which are designed as plain bearings, and the high-vacuum safety valve with oil. This valve closes when the shaft stops rotating, causing the oil pressure generated by the oil pump to drop.
- On the shaft 12 permanent magnets sit 14.
- Coils 10 generate a magnetic rotating field that changes its position by electronic commutation and thus set the shaft in rotation. Instead of the two waves of the prior art, namely rotor shaft and motor shaft, this pump has only one shaft.
- Sensors 16 are used to determine the angular position of the shaft.
- the sensor signals are read by the control electronics 8.
- the control electronics generates the necessary voltages and currents for the coils and the commutation signals.
- This control electronics is preferably located in a removable and in particular against the oil chamber dense part of the housing. Furthermore, it is designed so that it has to be connected to the energy supply only via a cable to an existing supply network, such as the 230 V AC mains or an industrial voltage network (eg 24 V or 48 V).
- control electronics is designed so that they single or multi-phase line voltages between 60 V and 400 V or Industrial voltage networks (24 V or 48 V) can be operated.
- One Selector switch allows adjustment to the respective supply voltage.
- control electronics contains means with which they automatically can detect the applied supply voltage.
- the control electronics 8 includes a power unit 9 for controlling the coils. It is advantageous if this power unit in thermal contact with the Housing wall is brought. About the housing is then in thermal Convection dissipates the heat from the pump, creating additional coolant can be avoided.
- the coils in a mass, for example. Synthetic resin, shed so that they not attacked by the oil and the possibly contained residues and can be decomposed. Such residues occur, for example, in fields of application pumps, where corrosive and other process gases are pumped have to.
- control electronics allows the shaft with various user-selectable rotational frequencies to operate and thus regulate the pumping speed of the pump.
- the hydraulic pump must be so be designed so that they have enough oil pressure even in the lower speed range built to provide the bearings with oil and the High vacuum safety valve 20 to open. A pressure relief valve in the oil circuit must then open at high speeds to avoid excessive pressure.
- the oil pump is dispensed with.
- the high vacuum safety valve is designed electromagnetically and is of the Control electronics 8 controlled via cable 22. If the control electronics detects that When the shaft stops turning, it turns off the electromagnetic High vacuum safety valve in the closed state.
- control electronics 8 containing housing part disposed within the pump housing.
- FIG. 2 A further advantageous embodiment is shown in FIG. 2.
- this rotary vane vacuum pump has a containment shell 18. This sits between the shaft and the coils, allowing the coils outside the oil-filled room.
- This containment shell consists of a non-magnetic material, such as a ceramic.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary Pumps (AREA)
Abstract
Description
Drehschiebervakuumpumpen des hier vorliegenden Typs gehören zu der Klasse der ölüberlagerten Verdrängerpumpen. Das Öl in der Pumpe erfüllt mehrere Aufgaben, darunter fällt zum einen die Abdichtung der Gasaustritts- gegen die Gaseintrittsseite. Zum anderen dient das Öl zur Kühlung und Schmierung der mechanischen Komponenten der Pumpe.
Das Öl spielt allerdings auch eine negative Rolle bei der Auslegung des Antriebsmotors. Zu Beginn des Betriebes, wenn die Pumpe kalt ist, ist das Öl zäh und dickflüssig. Damit wird sehr viel Leistung auf Seite des Antriebsmotors benötigt, um den Rotor der Pumpe drehen zu lassen. Bei unzureichender Dimensionierung, d.h. zu geringem Drehmoment, des Antriebsmotors kann es sogar vorkommen, dass die Pumpe gar nicht erst anläuft. Abhilfe kann die Wahl eines Öles mit höherer Viskosität schaffen, allerdings besitzen solche Öle leichtflüchtige Bestandteile, so dass der Enddruck zunimmt (Wutz: "Handbuch Vakuumtechnik", Vieweg-Verlag, 8te Auflage, S. 202ff). Da dies nicht in allen Pumpenanwendungen hingenommen werden kann, werden die Antriebsmotore in ölgeschmierten Drehschiebervakuumpumpen sehr leistungsstark ausgelegt.
Gattungsgemäße Drehschiebervakuumpumpen nach dem Stand der Technik werden mit asynchronen Wechselstrom-Elektromotoren ausgerüstet. Deren typisches Drehmoment in Abhängigkeit von der Drehzahl ist in Figur 3 gezeigt. Bei niedrigen Drehzahlen ist das Drehmoment gering, das deutlich höhere maximale Drehmoment wird erst bei mittleren Drehzahlen erreicht. Bei höheren Drehzahlen fällt das Drehmoment wieder ab. Dieser Sachverhalt bedingt, dass die Antriebsmotoren überdimensioniert werden müssen, damit die Drehschiebervakuumpumpen überhaupt anlaufen können. Diese Überdimensionierung verursacht eine unnötig hohe Leistungsaufnahme des Antriebes und erhöht dadurch sowohl die Herstellungskosten, als auch die Betriebskosten der Pumpe. Letztere spielen in zunehmenden Maße eine Rolle, da gerade Drehschiebervakuumpumpen für den Dauerbetrieb gedacht sind.
Negativ wirkt sich die Überdimensionierung des Antriebsmotors auch auf die Größe der gesamten Pumpe aus. Ein kompaktes Bauvolumen, wie es in heutigen Pumpständen und Anlagen anzustreben ist, lässt sich nicht auf Basis der Antriebsmotoren des Standes der Technik realisieren. Dies wird noch verschärft, da die nicht in Drehung des Rotors umgesetzte elektrische Energie in abzuführende Wärme umgewandelt wird. Diese muss innerhalb des Pumpstandes abgeführt werden, gegebenenfalls sogar mit aktiver Kühlung.
Wechselstromelektromotoren, wie sie meist insbesondere in kleinen und mittleren Drehschiebervakuumpumpen mit Saugvermögen bis 40 m3/h eingesetzt werden, sind oft Zweiphasenmotoren. Bei diesen Motoren werden Kondensatoren eingesetzt, um mehr als zwei Spulen pro Umfang einsetzen zu können. Daraus ergibt sich eine ungleichmäßige Drehmomentcharakteristik, d.h. ein ungleichmäßiges Drehmoment bezogen auf eine ganze Umdrehung der Welle. Hieraus resultiert eine unnötig hohe Vibrations- und Geräuschentwicklung, die in sehr vielen Anwendungsfällen schwer tolerierbar ist. Durch geeignete Installationsmaßnahmen muss dafür gesorgt werden, dass diese Schwingungen nicht auf z.B. empfmdliche Laborapparaturen übertragen werden.
Das Öl innerhalb der Drehschieberpumpe dient zum Kühlen, zum Schmieren der beweglichen Teile und zur Abdichtung des Schöpfraums. Eine Verschmutzung der Pumpenumgebung durch Öl, das aus dem Gehäuse austritt, gilt es zu verhindern. Gerade das Abdichten der Durchführung der Rotorwelle durch das Gehäuse ist schwierig. Traditionell werden hier Radialwellendichtungen eingesetzt, die allerdings einen hohen Verschleiß aufweisen, d.h. zu hohen Wartungskosten führen. Um die Probleme dieser Dichtungen zu beseitigen werden im Stand der Technik Drehschiebervakuumpumpen mit Magnetkupplung und Spalttopf ausgerüstet, was zu einer Erhöhung der Herstellungskosten bei Senkung der Betriebskosten führt.
Im Stand der Technik besitzt das Antriebssystem einer Drehschiebervakuumpumpe mindestens zwei Wellen, nämlich Rotorwelle und Motorwelle. Beide müssen gelagert werden, außerdem werden Kupplungselemente zwischen den Wellen benötigt. Diese Maßnahmen erhöhen die Zahl der Bauteile, die Montagekosten und die Fehleranfälligkeit der Pumpe.
Statt mehrere Wellen, wie im Stand der Technik, benötigt die erfindungsgemäße Drehschiebervakuumpumpe nur eine einzige Welle, wodurch Herstellkosten uind Fehleranfälligkeit reduziert werden.
Auf der Welle 12 sitzen Permanentmagnete 14. Spulen 10 erzeugen eine magnetisches Drehfeld, dass durch elektronische Kommutation seine Lage ändert und damit die Welle in Rotation versetzt. Statt der zwei Wellen des Standes der Technik, nämlich Rotorwelle und Motorwelle, besitzt diese Pumpe nur noch eine Welle. Sensoren 16, vorzugsweise Hallsensoren, dienen zur Bestimmung der Winkellage der Welle. Die Sensorsignale werden von der Regelelektronik 8 eingelesen. Die Regelelektronik erzeugt die für die Spulen notwendigen Spannungen und Ströme sowie die Kommutierungssignale. Diese Regelelektronik sitzt vorzugsweise in einem abnehmbaren und insbesondere gegen den Ölraum dichten Teil des Gehäuses. Weiterhin ist sie so ausgebildet, dass sie zur Energieversorgung lediglich über ein Kabel mit einem vorhandenen Versorgungsnetz, wie beispielsweise dem 230 V Wechselstromnetz oder einem Industriespannungsnetz (bspw. 24 V oder 48 V), verbunden werden muss.
Claims (10)
- Ölgedichtete Drehschiebervakuumpumpe (1) mitdadurch gekennzeichnet,mindestens einer Pumpstufe,wobei jede Pumpstufe aus einer zylindrischen Kammer mit darin exzentrisch angeordneter mit Schiebern (7) versehene Welle (12) besteht,wobei alle Pumpstufen von einer einstückigen Welle angetrieben werden,mit einem Antriebssystem für die Welle,dass das Antriebssystem aus auf der Welle angebrachten Permanentmagneten (14) und ortfesten elektrischen Spulen (10) besteht, die ein elektrisches Drehfeld erzeugen,dass die zur Ansteuerung der Spulen notwendige Regelektronik (8) in einem abnehmbaren Gehäuseteil der Pumpe angeordnet ist.
- Ölgedichtete Drehschiebervakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen der Welle und den Spulen (10) ein Spalttopf (18) zur Trennung von Pumpraum (9) und Atmosphäre dient.
- Ölgedichtete Drehschiebervakuumpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass Sensoren (16) zur Bestimmung der Rotorlage vorhanden sind.
- Ölgedichtete Drehschiebervakuumpumpe nach Anspruch 3, dadurch gekennzeichnet, dass die Sensoren (16) zur Bestimmung der Rotorlage Hallsensoren sind.
- Ölgedichtete Drehschiebervakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Regelelektronik (8) Mittel zur Änderung der Drehzahl der Welle enthält.
- Ölgedichtete Drehschiebervakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Regelelektronik (8) so ausgebildet ist, dass sie zur Energieversorgung direkt mit einem Spannungsnetz verbunden ist.
- Ölgedichtete Drehschiebervakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Regelelektronik (8) mit ein- oder mehrphasigen Spannungen zwischen 60 V und 400 V betrieben werden kann.
- Ölgedichtete Drehschiebervakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens der Leistungsteil (9) der Regelelektronik (8) mit der Gehäusewandung in thermischen Kontakt steht.
- Ölgedichtete Drehschiebervakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Spulen (10) in Kunstharz vergossen sind.
- Ölgedichtete Drehschiebervakuumpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der die Regelelektronik (8) beinhaltende Gehäuseteil innerhalb des Pumpengehäuses (2) angeordnet ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004024554 | 2004-05-18 | ||
| DE102004024554.1A DE102004024554B4 (de) | 2004-05-18 | 2004-05-18 | Ölgedichtete Drehschiebervakuumpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1598558A1 true EP1598558A1 (de) | 2005-11-23 |
| EP1598558B1 EP1598558B1 (de) | 2015-12-30 |
Family
ID=34935641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05008941.6A Expired - Lifetime EP1598558B1 (de) | 2004-05-18 | 2005-04-23 | Ölgedichtete Drehschiebervakuumpumpe |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20050260082A1 (de) |
| EP (1) | EP1598558B1 (de) |
| DE (1) | DE102004024554B4 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017192036A1 (en) * | 2016-05-03 | 2017-11-09 | Actuant Corporation | Pump unit with integrated piston pump and electric motor |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006022772A1 (de) | 2006-05-16 | 2007-11-22 | Pfeiffer Vacuum Gmbh | Antriebsanordnung für eine Vakuumpumpe |
| DE102006032765A1 (de) * | 2006-07-14 | 2008-01-17 | Leybold Vacuum Gmbh | Vakuumpumpe |
| DE102006039958A1 (de) * | 2006-08-25 | 2008-02-28 | Busch Produktions Gmbh | Drehschieber-Vakuumpumpe bzw.-Verdichter in Blockbauweise mit fliegend gelagertem Scheibenläufer-Synchronmotor |
| DE102006058837C5 (de) * | 2006-12-13 | 2022-05-05 | Pfeiffer Vacuum Gmbh | Schmiermittelgedichtete Drehschiebervakuumpumpe |
| DE102006058843A1 (de) * | 2006-12-13 | 2008-06-19 | Pfeiffer Vacuum Gmbh | Vakuumpumpe |
| DE102007060147A1 (de) | 2007-12-13 | 2009-06-18 | Pfeiffer Vacuum Gmbh | Drehschiebervakuumpumpe |
| DE102008042656A1 (de) | 2008-10-07 | 2010-04-15 | Ilmvac Gmbh | Elektromotor mit gekapseltem Motorgehäuse |
| EP2530325B1 (de) * | 2010-01-29 | 2018-10-17 | Ulvac Kiko, Inc. | Pumpe |
| CN102280965B (zh) * | 2010-06-12 | 2013-07-24 | 中国科学院沈阳科学仪器股份有限公司 | 真空泵用屏蔽电机 |
| US20140363319A1 (en) * | 2013-06-07 | 2014-12-11 | Agilent Technologies, Inc | Rotary vane vacuum pump |
| DE102015010846B4 (de) | 2015-08-19 | 2017-04-13 | Nidec Gpm Gmbh | Elektromotorisch angetriebene Vakuumpumpe |
| DE102015118022B4 (de) * | 2015-10-22 | 2024-05-29 | Pfeiffer Vacuum Gmbh | Rotationsverdrängervakuumpumpe |
| WO2017080599A1 (de) * | 2015-11-12 | 2017-05-18 | Pierburg Pump Technology Gmbh | Elektrische-kfz-vakuumpumpe |
| US11905958B2 (en) * | 2017-03-29 | 2024-02-20 | Hong Wang | Vacuuming device and vacuum apparatus |
| CN106704185B (zh) * | 2017-03-29 | 2019-03-19 | 王鸿 | 抽真空装置及真空设备 |
| EP3597922B1 (de) * | 2018-07-19 | 2024-08-28 | Agilent Technologies, Inc. (A Delaware Corporation) | Vakuumpumpsystem mit ölgeschmierter vakuumpumpe |
| IT202000004513A1 (it) * | 2020-03-04 | 2021-09-04 | Marziano Salvaro | Pompa per il vuoto, particolarmente per apparecchiature per la conservazione di cibi. |
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| DE9007544U1 (de) * | 1990-05-29 | 1992-08-13 | Leybold AG, 6450 Hanau | Drehschiebervakuumpumpe |
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| DE4208194A1 (de) * | 1992-03-14 | 1993-09-16 | Leybold Ag | Verfahren zum betrieb einer oelgedichteten vakuumpumpe sowie fuer die durchfuehrung dieses verfahrens geeignete vakuumpumpe |
| DE4325282A1 (de) * | 1993-07-28 | 1995-02-02 | Leybold Ag | Vakuumpumpe mit Zusatzeinrichtung |
| US5618167A (en) * | 1994-07-28 | 1997-04-08 | Ebara Corporation | Vacuum pump apparatus having peltier elements for cooling the motor & bearing housing and heating the outer housing |
| EP0733804B1 (de) * | 1995-03-20 | 2002-12-18 | Ebara Corporation | Vakuumpumpe |
| WO2000008338A1 (en) * | 1998-08-06 | 2000-02-17 | Automotive Motion Technology Limited | A motor driven pump |
| US6293772B1 (en) * | 1998-10-29 | 2001-09-25 | Innovative Mag-Drive, Llc | Containment member for a magnetic-drive centrifugal pump |
| JP3403719B2 (ja) * | 1999-08-10 | 2003-05-06 | 株式会社イワキ | マグネットポンプ |
| DE10026003A1 (de) * | 2000-05-25 | 2001-12-06 | Bosch Gmbh Robert | Stator |
| JP3930243B2 (ja) * | 2000-11-06 | 2007-06-13 | 本田技研工業株式会社 | マグネットポンプ |
| JP3913980B2 (ja) * | 2000-12-22 | 2007-05-09 | 本田技研工業株式会社 | 車両用エンジンにおける磁力式ポンプ駆動装置 |
| US20040056539A1 (en) * | 2001-11-30 | 2004-03-25 | Du Hung T. | Electric motor having armature coated with a thermally conductive plastic |
| JP2003269345A (ja) * | 2002-03-13 | 2003-09-25 | Aisin Seiki Co Ltd | 電動オイルポンプ |
| JP2003314469A (ja) * | 2002-04-24 | 2003-11-06 | Matsushita Electric Ind Co Ltd | 冷媒ポンプ |
| DE10223869A1 (de) * | 2002-05-29 | 2003-12-11 | Leybold Vakuum Gmbh | Zwei-Wellen-Vakuumpumpe |
| US7042122B1 (en) * | 2002-08-02 | 2006-05-09 | James Dufala | Electric motor |
| US7471026B2 (en) * | 2006-03-13 | 2008-12-30 | Isca Innovatons, Llc | Brushless electric motor |
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2004
- 2004-05-18 DE DE102004024554.1A patent/DE102004024554B4/de not_active Expired - Fee Related
-
2005
- 2005-04-23 EP EP05008941.6A patent/EP1598558B1/de not_active Expired - Lifetime
- 2005-05-17 US US11/130,574 patent/US20050260082A1/en not_active Abandoned
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| JPS57146091A (en) * | 1981-03-06 | 1982-09-09 | Suzuki Sogyo Kk | Compressor |
| GB2151091A (en) * | 1983-11-07 | 1985-07-10 | Pfeiffer Vakuumtechnik | Electric drive for oil sealed sliding vane rotary vacuum pump |
| DE3730583A1 (de) * | 1986-12-24 | 1988-07-07 | Medizin Labortechnik Veb K | Drehschiebervakuumpumpe |
| US5110264A (en) * | 1989-12-20 | 1992-05-05 | Allied-Signal Inc. | Variable speed turbo vacuum pump |
| US20020172599A1 (en) * | 1994-04-21 | 2002-11-21 | Ebara Corporation | Multishaft electric motor and positive-displacement pump combined with such multishaft electric motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017192036A1 (en) * | 2016-05-03 | 2017-11-09 | Actuant Corporation | Pump unit with integrated piston pump and electric motor |
| NL2016728B1 (en) * | 2016-05-03 | 2017-11-10 | Actuant Corp | Pump unit with integrated piston pump and electric motor. |
| CN109312736A (zh) * | 2016-05-03 | 2019-02-05 | 实用动力集团 | 具有集成的活塞泵和电动马达的泵单元 |
| US10598177B2 (en) | 2016-05-03 | 2020-03-24 | Power Packer North America, Inc. | Pump unit with integrated piston pump and electric motor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004024554A1 (de) | 2005-12-15 |
| US20050260082A1 (en) | 2005-11-24 |
| EP1598558B1 (de) | 2015-12-30 |
| DE102004024554B4 (de) | 2018-01-25 |
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