DE3340198A1 - Oil-sealed sliding-vane rotary vacuum pump with drive motor in a housing - Google Patents
Oil-sealed sliding-vane rotary vacuum pump with drive motor in a housingInfo
- Publication number
- DE3340198A1 DE3340198A1 DE19833340198 DE3340198A DE3340198A1 DE 3340198 A1 DE3340198 A1 DE 3340198A1 DE 19833340198 DE19833340198 DE 19833340198 DE 3340198 A DE3340198 A DE 3340198A DE 3340198 A1 DE3340198 A1 DE 3340198A1
- Authority
- DE
- Germany
- Prior art keywords
- drive motor
- oil
- vacuum pump
- generator
- housing
- 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
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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/08—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed
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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
- F04C2/00—Rotary-piston machines or pumps
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 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 groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
- F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 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 groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
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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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/42—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual single-phase induction motor
- H02P1/44—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual single-phase induction motor by phase-splitting with a capacitor
- H02P1/445—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual single-phase induction motor by phase-splitting with a capacitor by using additional capacitors switched at start up
-
- 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
- F04C2220/00—Application
- F04C2220/10—Vacuum
-
- 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
- F04C29/02—Lubrication; Lubricant separation
Abstract
Description
— Tf —- Tf -
ARTHUR PFEIFFER VAKUUMTECHNIK WETZLAR GMBHARTHUR PFEIFFER VAKUUMTECHNIK WETZLAR GMBH
ölgedichtete Drehschiebervakuumpumpe mit Antriebsmotor in einem Gehäuseoil-sealed rotary vane vacuum pump with drive motor in one housing
Die Erfindung betrifft eine ölgedichtete Drehschiebervakuumpumpe nach dem Oberbegriff des Anspruches 1, bei der zur Optimierung des Antriebsmotors der Anlaufkondensator nach Überschreiten des Kippmomentes abgeschaltet wird.The invention relates to an oil-sealed rotary vane vacuum pump according to the preamble of claim 1, at which switches off the starting capacitor to optimize the drive motor after the breakdown torque is exceeded will.
In der DE OS 26 20 375 wird eine Drehschiebervakuumpumpe beschrieben, die mit Öl abgedichtet ist und durch einen direkt gekuppelten Antriebsmotor angetrieben wird. Dabei sind das Pumpsystem und der elektrische Antriebsmotor in einem gemeinsamen Gehäuse untergebracht, welches soweit mit öl gefüllt ist, daß beide Aggregate im öl laufen. Zur Überwachung der Drehzahl ist auf der Pumpenwelle zusätzlich ein elektrischer Generator angebracht.In DE OS 26 20 375 a rotary vane vacuum pump is described which is sealed with oil and by a directly coupled drive motor is driven. This includes the pumping system and the electric drive motor housed in a common housing which is filled with oil to such an extent that both units are in the oil to run. An electric generator is also attached to the pump shaft to monitor the speed.
Für den Hochlauf der Pumpe wird allein schon zur Beschleunigung der rotierenden Teile ein höheres Drehmoment benötigt als dies für den Betrieb bei Nenndrehzahl der Fall ist, Wenn aber das Pumpsystem und der Antriebsmotor wie im hier beschriebenen Falle völlig von öl überdeckt sind und somit alle rotierenden Teile im Öl laufen, ist ein beträchtlichesFor the pump to run up, a higher torque is required to accelerate the rotating parts than is the case for operation at nominal speed, but if the pumping system and the drive motor as in here are completely covered by oil and thus all rotating parts run in the oil, is a considerable case
zusätzliches Drehmoment für den Hochlauf notwendig, um die Zähigkeit des Öles zu überwinden.additional torque required for run-up in order to overcome the viscosity of the oil.
Dies macht sich noch verstärkt im kalten Zustand bemerkbar, wenn die Zähigkeit des Öles besonders groß ist. Einen Antriebsmotor, insbesondere einen Wechselstrommotor, nur für die kurze Zeitspanne des Hochlaufes auszulegen, würde eine starke Überdimensionierung, bezogen auf den Dauerbetrieb der Pumpe, bedeuten. Neben den Nachteilen einer räumlich ungünstigeren Bauweise, höheren Kosten, gesteigertem Energieverbrauch und größerer Lärmbelästigung tritt hierbei besonders des Problem einer zu großen Wärmeentwicklung auf. Mit Rücksicht auf das verwendete Öl darf eine bestimmte Temperatur (z.B: 1000C) nicht überschritten werden.This is even more noticeable in the cold state, when the viscosity of the oil is particularly high. Designing a drive motor, in particular an alternating current motor, only for the short period of start-up would mean a significant oversizing, based on the continuous operation of the pump. In addition to the disadvantages of a spatially less favorable construction, higher costs, increased energy consumption and greater noise pollution, the problem of excessive heat generation occurs in particular. With regard to the oil used, a certain temperature (eg: 100 ° C.) must not be exceeded.
Um das Drehmoment eines Wechselstrommotores, der für den Dauerbetrieb ausgelegt ist, während der Hochlaufzeit der Pumpe zu erhöhen, kann man einen zusätzlichen Anlaufkondensator dem Betriebskondensator parallel schalten (s. AEG-Telefunken-Handbücher 4 "Einphasenmotoren"). Nach Überschreitung des Kippmomentes des Antriebsmotores, das dem höchsten Drehmoment entspricht, das dieser kurzzeitig aufbringen kann, wird der Anlaufkondensator wieder abgeschaltet, um eine Überhitzung des Motors zu vermeiden.To increase the torque of an AC motor designed for continuous operation during the run-up time of the To increase the pump, an additional starting capacitor can be connected in parallel with the operating capacitor (See AEG Telefunken manuals 4 "Single-phase motors"). After exceeding the overturning moment of the drive motor, that corresponds to the highest torque that it can briefly generate, becomes the starting capacitor again switched off to avoid overheating of the motor.
Die Abschaltung des Anlaufkondensators geschieht nachThe starting capacitor is switched off after
dem seitherigen Stand der Technik entweder durch Fliehkraftschalter, Stromrelais oder Zeitrelais.the current state of the art either through centrifugal switches, Current relay or timing relay.
Um einen universellen Einsatz der Drehschiebervakuumpumpen zu gewährleisten, müssen diese für unterschiedliche Netzspannungen und -frequenzen geeignet sein. Diese Forderung und durch die Bauweise der Drehschiebervakuumpumpe bedingte Tatsachen führen jedoch bei Verwendung einer der drei gebräuchlichen Abschaltelemente zu folgenden Nachteilen:In order to ensure universal use of the rotary vane vacuum pumps, they must be used for different Line voltages and frequencies must be suitable. This requirement and the design of the rotary vane vacuum pump however, conditional facts lead to the use of one of the three common shutdown elements the following disadvantages:
Fliehkraftschalter:Centrifugal switch:
Die Verwendung von Fliehkraftschaltern, die unter Öl laufen, führt zu einigen Problemen. Zum Beispiel tritt eine Isolation der Kontakte durch das öl auf; weiterhin wird es schwierig, die bewegten Teile in dem Öl, bedingt durch dessen Zähigkeit, exakt zu schalten. Beim Einbau von Fliehkraftschaltern vergrößert sich der Motor in seiner Baulänge, was neben ungünstigeren räumlichen Verhältnissen auch negative Auswirkungen auf die Laufruhe hat.Using centrifugal switches that run under oil creates a number of problems. For example, one occurs Isolation of the contacts by the oil; furthermore, it becomes difficult due to the moving parts in the oil its tenacity to switch exactly. When installing centrifugal switches the engine increases in length, which is not only less favorable spatial conditions, but also negative Has an impact on smoothness.
Ein weiterer Nachteil von Fliehkraftschaltern ist, daß sie, wenn sie auf eine bestimmte Drehzahl eingestellt sind, bei dieser Drehzahl schalten, unabhängig davon, mit welcher Frequenz der Motor betrieben wird. Das Kippmoment des Motors und somit der Zeitpunkt, zu dem der Anlaufkondensator abge-Another disadvantage of centrifugal switches is that, when they are set to a certain speed, at this speed, regardless of the frequency at which the motor is operated. The breakdown torque of the motor and thus the point in time at which the starting capacitor
schaltet werden soll, ist jedoch von der Frequenz, mit der der Motor betrieben wird, abhängig.is to be switched, however, depends on the frequency with which the motor is operated.
Stromrelais:Current relay:
Die Verwendung von Stromrelais hat den Nachteil, daß für jede Spannung und Frequenz ein anderer Typ verwendet werden muß, um den Zeitpunkt der Schaltens genau einhalten zu können.The use of current relays has the disadvantage that a different type is used for each voltage and frequency must be in order to be able to adhere to the timing of the switching exactly.
Zeitrelais:Time relay:
Bei Zeitrelais treten die gleichen Nachteile wie bei Stromrelais auf, da sie ebenfalls von Spannung und Frequenz abhängig sind. Ein zusätzlicher Nachteil hierbei ist, daß die Zeit fest vorgegeben ist, d.h. wenn sich die Hochlaufzeit durch irgendwelche Randbedingungen ändert, zum Beispiel durch Temperaturänderung, kann der Schaltpunkt nicht optimal eingehalten werden. Zum Beispiel kommt es bei verspätetem Abschalten des Anlaufkondensators zur Überhitzung der Wicklung.The same disadvantages occur with timing relays as with current relays, since they are also dependent on voltage and frequency are. An additional disadvantage here is that the time is fixed, i.e. when the ramp-up time is changes due to any boundary conditions, for example due to a change in temperature, the switching point cannot be optimally maintained will. For example, if the starting capacitor is switched off too late, the winding will overheat.
Der Erfindung liegt die Aufgabe zugrunde, einen bei allen Betriebszuständen optimal ausgelegten Einphasenantrieb für ölgedichtete Drehschiebervakuumpumpen mit integriertem Antriebsmotor vorzustellen. Dabei war zu berücksichtigen, daß sich Pumpsystem und Antriebsmotor in einem gemeinsamen Gehäuse befinden und von Öl überdeckt sind.The object of the invention is to provide one in all operating states Optimally designed single-phase drive for oil-sealed rotary vane vacuum pumps with integrated drive motor to introduce. It had to be taken into account that the pump system and drive motor are located in a common housing and are covered with oil.
Weiterhin sollte eine minimale Baugröße und eine möglichst geringe Leistungsaufnahme angestrebt werden. Die Pumpe soll fürFurthermore, a minimum size and as small as possible Power consumption should be aimed for. The pump is designed for
unterschiedliche Betriebsbedingungen (z.B. verschiedene Netzspannung und -frequenz, verschiedene Umgebungstemperaturen) einsatzbereit sein.different operating conditions (e.g. different mains voltage and frequency, different ambient temperatures).
Die Aufgabe der Erfindung wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The object of the invention is achieved by the characterizing features of claim 1.
Zur Erhöhung des Anlaufmomentes eines Wechselstromotors wird parallel zum Betriebskondensator ein Anlaufkondensator geschaltet. Hat die Pumpe eine Drehzahl erreicht, bei der das Kippmoment des Motors überschritten ist, wird der Anlaufkondensator abgeschaltet. Das Signal zur Abschaltung (in Form einer Frequenz oder einer Spannung) wird von einem Generator geliefert, der sich auf der Pumpenwelle befindet. Die Steuerung besteht aus einem Netzteil, einem Elektronikteil und aus einem Leistungsteil. Das Netzteil ist so ausgelegt, daß alle Funktionen der Elektronik in den Bereichen von 90V bis 130V und von 180V bis 360V sicher geschaltet werden, wobei der Trafo im ersten Fall primärseitig umgeschaltet wird. Dies gilt auch für die Netzfrequenzen 50 Hz und 60 Hz, wobei die Umschaltung automatisch oder von Hand erfolgen kann. Läuft der Motor hoch, so gibt der auf der Pumpenwelle sitzende Generator eine etwa sinusförmige Spannung ab, deren Frequenz von der Drehzahl der Pumpenwelle abhängig ist. Diese Generatorspannung und -frequenz werden von der Elektronik so verarbeitet, daß bei Erreichen einerTo increase the starting torque of an AC motor a starting capacitor is connected in parallel to the operating capacitor. When the pump has reached a speed When the breakdown torque of the motor is exceeded, the starting capacitor is switched off. The signal for Shutdown (in the form of a frequency or a voltage) is provided by a generator based on the Pump shaft is located. The control consists of a power supply unit, an electronics unit and a power unit. The power supply is designed so that all functions of the electronics in the ranges from 90V to 130V and from 180V to 360V can be safely switched, whereby the transformer is switched on the primary side in the first case. this applies also for the mains frequencies 50 Hz and 60 Hz, whereby the Switching can be done automatically or manually. When the motor starts up, it gives on the pump shaft The generator generates an approximately sinusoidal voltage, the frequency of which depends on the speed of the pump shaft is. This generator voltage and frequency are processed by the electronics so that when a
bestimmten Drehzahl der Pumpenwelle, bei der das Kippmoment des Antriebsmotors überschritten ist, ein Signal zum Abschalten des Anlaufkondensators geliefert wird, unabhängig von der Netzfreguenz. Die Elektronik ist so ausgelegt, daß bei Änderung der Netzfrequenz die Drehzahl, bei der die Abschaltung erfolgen soll, dem zu der jeweiligen Netzfrequenz gehörenden Kippmoment automatisch oder manuell zugeordnet werden kann. Das Signal kann sowohl durch die Generatoffrequenz als auch durch die Generatorspannung gesteuert werden.certain speed of the pump shaft at which the breakdown torque of the drive motor is exceeded, a signal to Shutdown of the starting capacitor is supplied independently from the mains frequency. The electronics are designed in such a way that when the mains frequency changes, the speed, at which the shutdown is to take place, automatically or manually according to the breakdown torque associated with the respective grid frequency can be assigned. The signal can be generated both by the generator frequency and by the generator voltage being controlled.
Die mit der Erfindung erzielten Vorteile bestehen darin, daß der Anlaufkondensator durch Signale des Generators, der sich auf der Pumpenwelle befindet, bei einer dem Kippmoment des Motors zugeordneten Drehzahl sicher abgeschaltet werden kann, und zwar unabhängig von der Netzspannung, der Netζfrequenz und von anderen äußeren Betriebsbedingungen, wie z.B. Temperatur. Dabei werden optimale Baugröße und Betriebsdaten der Pumpe erreicht. Der Motor kann für den Dauerbetrieb ausgelegt werden und muß nicht für die ein wesentlich höheres Drehmoment erfordernde kurze Hochlaufzeit ausgelegt werden.The advantages achieved with the invention are that the starting capacitor by signals from the generator, which is located on the pump shaft, is safely switched off at a speed assigned to the breakdown torque of the motor independent of the mains voltage, the mains frequency and other external operating conditions, such as temperature. In doing so, the optimal size and operating data of the pump are achieved. Of the The motor can be designed for continuous operation and does not have to be designed for those requiring a significantly higher torque short run-up times.
Anahnd der folgenden Abbildung soll die Erfindung näher erläutert werden.The invention is to be explained in more detail on the basis of the following figure.
Der Rotor der Drehschiebervakuumpumpe 1, der Antriebsmotor 2 und der Generator 3 sind auf einer gemeinsamen Welle angeordnet. Im Klemmenkasten 4 des Antriebsmotors sind die Wicklungsenden des Antriebsmotors 2 und des Generators 3 sowie die Anschlüsse der Kondensatorabschaltelektronik 5 elektrisch verbunden.The rotor of the rotary vane vacuum pump 1, the drive motor 2 and the generator 3 are arranged on a common shaft. In terminal box 4 of the drive motor are the winding ends of the drive motor 2 and of the generator 3 as well as the connections of the capacitor switch-off electronics 5 electrically connected.
Legt man die entsprechende Netzspannung 6 im Klemmenkasten 4 an, beginnt der Hochlauf des Antriebsmotors 2. Um das erforderliche hohe Anlaufmoment beim Antriebsmotor zu erreichen, sind der Anlaufkondensator 7 und Betriebskondensator 8 in der Hochlaufphase durch die Kondensatorschaltelektronik 5 parallel geschaltet. Bei Erreichen einer dem Kippmoment des Antriebsmotors zugeordneten Drehzahl gibt der Generator 3 eine bestimmte Spannung bzw. Frequenz ab, welche von der Kondensatorabschaltelektronik so verarbeitet wird, daß dies die Abschaltung des Anlaufkondensators 7 zur Folge hat. Dies geschieht, indem das Leistungsrelais 9 von der Kondensatorabschalt-Elektronik betätigt wird, und der Relaiskontakt 10 den Stromkreis öffnet, d.h. der Anlaufkondensator 7 wird abgeschaltet.If the corresponding mains voltage 6 is applied in the terminal box 4, the drive motor 2 starts to run up To achieve the required high starting torque in the drive motor, the starting capacitor 7 and operating capacitor 8 are in the run-up phase through the capacitor switching electronics 5 connected in parallel. When a speed assigned to the breakdown torque of the drive motor is reached the generator 3 emits a certain voltage or frequency, which is determined by the capacitor switch-off electronics is processed in such a way that this results in the shutdown of the starting capacitor 7. It does this by using the Power relay 9 is actuated by the capacitor shutdown electronics, and the relay contact 10 the circuit opens, i.e. the starting capacitor 7 is switched off.
AOAO
- Leerseite -- blank page -
Claims (3)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833340198 DE3340198A1 (en) | 1983-11-07 | 1983-11-07 | Oil-sealed sliding-vane rotary vacuum pump with drive motor in a housing |
CH4704/84A CH665512A5 (en) | 1983-11-07 | 1984-10-01 | OIL-SEALED ROTARY VALVE VACUUM PUMP WITH DRIVE MOTOR IN A HOUSING. |
IT23207/84A IT1178574B (en) | 1983-11-07 | 1984-10-18 | ROTARY DRAWER VACUUM PUMP WITH OIL SEAL AND DRIVE MOTOR IN A CASE |
GB08427034A GB2151091B (en) | 1983-11-07 | 1984-10-25 | Electric drive for oil sealed sliding vane rotary vacuum pump |
FR848416657A FR2554517B1 (en) | 1983-11-07 | 1984-10-31 | ROTARY PALLET VACUUM PUMP WITH HOUSING DRIVE MOTOR |
NL8403372A NL192553C (en) | 1983-11-07 | 1984-11-06 | Oil-sealed rotary vane vacuum pump with drive motor in a housing. |
JP59234851A JPS60180483A (en) | 1983-11-07 | 1984-11-07 | Slide vane rotary vacuum pump sealed with oil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833340198 DE3340198A1 (en) | 1983-11-07 | 1983-11-07 | Oil-sealed sliding-vane rotary vacuum pump with drive motor in a housing |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3340198A1 true DE3340198A1 (en) | 1985-05-15 |
DE3340198C2 DE3340198C2 (en) | 1992-06-11 |
Family
ID=6213654
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19833340198 Granted DE3340198A1 (en) | 1983-11-07 | 1983-11-07 | Oil-sealed sliding-vane rotary vacuum pump with drive motor in a housing |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS60180483A (en) |
CH (1) | CH665512A5 (en) |
DE (1) | DE3340198A1 (en) |
FR (1) | FR2554517B1 (en) |
GB (1) | GB2151091B (en) |
IT (1) | IT1178574B (en) |
NL (1) | NL192553C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004024554B4 (en) * | 2004-05-18 | 2018-01-25 | Pfeiffer Vacuum Gmbh | Oil-sealed rotary vane vacuum pump |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0641575Y2 (en) * | 1986-05-21 | 1994-11-02 | 株式会社三洋物産 | Wiring parts with lamps for pachinko machines |
FR2663690B1 (en) * | 1990-06-26 | 1994-04-01 | Alcatel Cit | DEVICE FOR PROVIDING SAFE MANAGEMENT OF A VACUUM PUMP. |
ITTO20040268A1 (en) | 2004-04-30 | 2004-07-30 | Varian Spa | ROTARY OIL MECHANICAL VACUUM PUMP AND METHOD OF PRODUCTION OF THAT PUMP |
US20140363319A1 (en) | 2013-06-07 | 2014-12-11 | Agilent Technologies, Inc | Rotary vane vacuum pump |
CN107327397B (en) * | 2017-08-29 | 2021-06-01 | 合肥恒大江海泵业股份有限公司 | Electric control system for monitoring and improving starting performance of submersible electric pump |
EP3492698A1 (en) | 2017-11-30 | 2019-06-05 | Agilent Technologies, Inc. (A Delaware Corporation) | Vacuum pumping system provided with a soundproofing arrangement |
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US3365639A (en) * | 1965-05-28 | 1968-01-23 | Gen Motors Corp | Light responsive motor start control circuit |
DE1808039B2 (en) * | 1968-11-09 | 1970-10-08 | Licentia Patent-Verwaltungs-GmbH, 6OOO Frankfurt | Single-phase operation capacitor motor with strong pull-up rotor for driving oil-filled vacuum pumps directly flanged to the motor |
DE2215323A1 (en) * | 1972-03-29 | 1973-10-11 | Andrae P Kg | ELECTRONICALLY CONTROLLED AUXILIARY PHASE SWITCH |
DE2620375A1 (en) * | 1976-05-08 | 1977-11-17 | Pfeiffer Vakuumtechnik | Rotary slide valve vacuum pump - has pump and motor in common housing which is filled with oil and has bearing in dividing wall |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US2235537A (en) * | 1939-09-13 | 1941-03-18 | Gen Electric | Phase relay control for split phase motors |
US3303402A (en) * | 1964-01-09 | 1967-02-07 | Phillips Petroleum Co | Single phase induction motor |
US3528103A (en) * | 1968-01-11 | 1970-09-08 | Gen Electric | Induction motor and starting and reversing circuit therefor |
US3882364A (en) * | 1972-08-18 | 1975-05-06 | Gen Electric | Induction motor control system |
DE2451685A1 (en) * | 1974-10-31 | 1976-05-06 | Pfeiffer Vakuumtechnik | VACUUM PUMP WITH BUILT-IN SHUT-OFF VALVE |
US4161681A (en) * | 1977-03-17 | 1979-07-17 | General Electric Company | Prime mover, method of operating such and circuit |
JPS54129310A (en) * | 1978-03-29 | 1979-10-06 | Toshiba Corp | Single phase induction motors |
JPS5879690A (en) * | 1981-11-06 | 1983-05-13 | Hitachi Ltd | Control method of compressor |
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1983
- 1983-11-07 DE DE19833340198 patent/DE3340198A1/en active Granted
-
1984
- 1984-10-01 CH CH4704/84A patent/CH665512A5/en not_active IP Right Cessation
- 1984-10-18 IT IT23207/84A patent/IT1178574B/en active
- 1984-10-25 GB GB08427034A patent/GB2151091B/en not_active Expired
- 1984-10-31 FR FR848416657A patent/FR2554517B1/en not_active Expired - Lifetime
- 1984-11-06 NL NL8403372A patent/NL192553C/en not_active IP Right Cessation
- 1984-11-07 JP JP59234851A patent/JPS60180483A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3365639A (en) * | 1965-05-28 | 1968-01-23 | Gen Motors Corp | Light responsive motor start control circuit |
DE1808039B2 (en) * | 1968-11-09 | 1970-10-08 | Licentia Patent-Verwaltungs-GmbH, 6OOO Frankfurt | Single-phase operation capacitor motor with strong pull-up rotor for driving oil-filled vacuum pumps directly flanged to the motor |
DE2215323A1 (en) * | 1972-03-29 | 1973-10-11 | Andrae P Kg | ELECTRONICALLY CONTROLLED AUXILIARY PHASE SWITCH |
DE2620375A1 (en) * | 1976-05-08 | 1977-11-17 | Pfeiffer Vakuumtechnik | Rotary slide valve vacuum pump - has pump and motor in common housing which is filled with oil and has bearing in dividing wall |
Non-Patent Citations (1)
Title |
---|
Zeitschrift Elektrie, H.11, (1959), S.428,429 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004024554B4 (en) * | 2004-05-18 | 2018-01-25 | Pfeiffer Vacuum Gmbh | Oil-sealed rotary vane vacuum pump |
Also Published As
Publication number | Publication date |
---|---|
NL192553B (en) | 1997-05-01 |
IT1178574B (en) | 1987-09-09 |
JPS60180483A (en) | 1985-09-14 |
GB2151091A (en) | 1985-07-10 |
FR2554517B1 (en) | 1990-05-04 |
IT8423207A0 (en) | 1984-10-18 |
DE3340198C2 (en) | 1992-06-11 |
NL192553C (en) | 1997-09-02 |
FR2554517A1 (en) | 1985-05-10 |
GB2151091B (en) | 1987-04-15 |
NL8403372A (en) | 1985-06-03 |
IT8423207A1 (en) | 1986-04-18 |
GB8427034D0 (en) | 1984-11-28 |
CH665512A5 (en) | 1988-05-13 |
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D2 | Grant after examination | ||
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8339 | Ceased/non-payment of the annual fee |