EP0925453B1 - Vane cell pump - Google Patents

Vane cell pump Download PDF

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Publication number
EP0925453B1
EP0925453B1 EP97919011A EP97919011A EP0925453B1 EP 0925453 B1 EP0925453 B1 EP 0925453B1 EP 97919011 A EP97919011 A EP 97919011A EP 97919011 A EP97919011 A EP 97919011A EP 0925453 B1 EP0925453 B1 EP 0925453B1
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EP
European Patent Office
Prior art keywords
plunger
vane cell
cell pump
absorber
pump according
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
Application number
EP97919011A
Other languages
German (de)
French (fr)
Other versions
EP0925453A1 (en
Inventor
Johann Merz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
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ZF Friedrichshafen AG
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Filing date
Publication date
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Publication of EP0925453A1 publication Critical patent/EP0925453A1/en
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Classifications

    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • F04C15/0049—Equalization of pressure pulses

Definitions

  • the invention relates to a vane pump for Conveying pressure oil from a container to a consumer.
  • Vane pump is a pump package consisting of one Rotor, several working slides and a cam ring, used. Between the cam ring and the rotor are through the working slide divided working chambers formed that are limited in the axial direction by control plates.
  • To the Pot-shaped housing cover includes on one side Bearing housing on, which contains suction and pressure channels that the Working chambers with the suction connection, a flow control valve and connect a pressure relief valve.
  • Working slides use rollers or sashes.
  • Such a vane pump is from the closest state of the art to be considered, DE 44 16 077 A1 known.
  • This pump is characterized by a compact design and cheap Manufacturing / assembly costs.
  • a vane pump pumps the oil not continuously, but non-uniformly in partial volumes per rotation.
  • the cyclically conveyed volumes cause pressure fluctuations especially on the print side, Pressure vibrations and / or pulsations.
  • the pressure vibrations are overlaid by inlet and outlet surges, which at Opening and closing of the working chambers arise.
  • the invention is based on such a design Vane pump and has the task of that through the Caused pulsations and pressure fluctuations To improve noise behavior.
  • This object is achieved by the pump characterized in claim 1 solved that the arranged on the opposite side of a bearing housing Pot-shaped housing cover is axially extended and a damper for damping Contains vibrations. Integration of the absorber in the lid takes up little additional space, but provides an inexpensive, space-saving solution for effective pulsation damping. In this absorber a piston arranged.
  • the extension also provided in the housing serves as a control plate together with the pump package for support under high pressure and thus for good sealing. So can on the extension for even better effect Tilgers a piston loaded by a spring and the piston resulting rear space is relieved by a damping hole in the extension his.
  • the piston can also be used against a sealing ring be cushioned. This results in a particularly inexpensive damper device.
  • a piston in the absorber which several elastic links are used.
  • the piston is supported in this Embodiment on a sealed edge of the housing and creates on it Back of a relieved room.
  • elastic members conical plugs an elastomer inserted into corresponding recesses that taper towards the relieved space. It has shown, that the elastic members improved further Vibration damping are suitable.
  • the vane pump has a corresponding structure DE 44 16 077 A1 and is only for the following understanding the most important components.
  • a Pump package 3 used in a pressure chamber 1 of a housing cover 2 is a Pump package 3 used.
  • a rotor 4 is via a drive shaft 5 supported in a bearing housing 2A.
  • the depository in the bearing housing 2A is the sole storage the drive shaft 5.
  • the drive shaft 5 is appropriately supported in the axial direction only on an extension 6 of the housing cover 2 from.
  • a seal 7 seals against the high pressure from.
  • the housing cover 2 is by screws 8 on the bearing housing 2A attached.
  • the pump package 3 has radial Slots of the rotor 4 guided working slide 10, which in a cam ring 11 when rotating a lifting movement To run. Between the cam ring 11, the rotor 4, the Working valves 10 and side control plates 12, 13 there are working chambers.
  • Housing cover 2 expanded so that in the area of the extension 6 a damper 14 connected to the pressure chamber 1 is formed.
  • This absorber 14 is chosen so large that pressure fluctuations the vane pump can be effectively damped. at working pump, the entire pump package 3 by the High pressure advantageously pressed to the right against the extension 6, creating a good gap seal between the pump package 3 and the control plates 12, 13 is secured.
  • Fig. 2 shows an embodiment with an additional Ring piston 15, which is guided on an extension 16 is.
  • the annular piston 15 is arranged in an absorber 17 and sealed between the housing cover 2 and the extension 16 (not shown).
  • a spring 18 dampens the piston movements.
  • FIG. 5 shows a further embodiment of a damper 17A with tapered links 25 in a piston 26.
  • Die tapered members 25 are elastic and take the pressure fluctuations so that these are more or less in Allow conical recesses 27 to be displaced.
  • Links 25 taper towards a relieved space 28 behind the piston 26.
  • the relieved space 28 is through a Formed housing edge 2B against which the piston 26 abuts.
  • On Pump package 3A is supported on the piston 26.
  • the room 28 is via a damping bore 30 to the unloaded front space 31 connected.
  • FIG. 6 is a variant with one in an absorber 32 arranged pistons 33 drawn.
  • the piston 33 contains an elastic ring 35 in an annular groove 34 back space 28A is through a damping hole 30A relieved.
  • FIGS. 3 to 6 come as elastic members expediently use elastomers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Description

Die Erfindung betrifft eine Flügelzellenpumpe zum Fördern von Drucköl aus einem Behälter zu einem Verbraucher. In einem Innenraum eines topfförmigen Gehäusedeckels der Flügelzellenpumpe ist ein Pumpenpaket, bestehend aus einem Rotor, mehreren Arbeitsschiebern und einem Kurvenring, eingesetzt. Zwischen dem Kurvenring und dem Rotor sind durch die Arbeitsschieber unterteilte Arbeitskammern gebildet, die in axialer Richtung durch Steuerplatten begrenzt sind. An den topfförmigen Gehäusedeckel schließt auf der einen Seite ein Lagergehäuse an, das Saug- und Druckkanäle enthält, die die Arbeitskammern mit dem Sauganschluß, einem Stromregelventil und einem Druckbegrenzungsventil verbinden. Als Arbeitsschieber kommen Rollen oder Flügel zum Einsatz.The invention relates to a vane pump for Conveying pressure oil from a container to a consumer. In an interior of a pot-shaped housing cover Vane pump is a pump package consisting of one Rotor, several working slides and a cam ring, used. Between the cam ring and the rotor are through the working slide divided working chambers formed that are limited in the axial direction by control plates. To the Pot-shaped housing cover includes on one side Bearing housing on, which contains suction and pressure channels that the Working chambers with the suction connection, a flow control valve and connect a pressure relief valve. As Working slides use rollers or sashes.

Eine derartige Flügelzellenpumpe ist aus der, als nächstliegender Stand der Technik zu betrachtenden, DE 44 16 077 A1 bekannt. Diese Pumpe zeichnet sich durch eine gedrungene Bauweise und durch günstige Fertigungs-/Montagekosten aus. Eine Flügelzellenpumpe fördert das Öl nicht kontinuierlich, sondern ungleichförmig in Teilvolumina pro Umdrehung. Die zyklisch geförderten Volumina verursachen insbesondere auf der Druckseite Druckschwankungen, Druckschwingungen und/oder Pulsationen. Die Druckschwingungen werden von Einlaß- und Auslaßstößen überlagert, die beim Öffnen und Schließen der Arbeitskammern entstehen.Such a vane pump is from the closest state of the art to be considered, DE 44 16 077 A1 known. This pump is characterized by a compact design and cheap Manufacturing / assembly costs. A vane pump pumps the oil not continuously, but non-uniformly in partial volumes per rotation. The cyclically conveyed volumes cause pressure fluctuations especially on the print side, Pressure vibrations and / or pulsations. The pressure vibrations are overlaid by inlet and outlet surges, which at Opening and closing of the working chambers arise.

Die Erfindung geht von einer derartigen Bauform einer Flügelzellenpumpe aus und hat die Aufgabe, das durch die Pulsationen und Druckschwankungen verursachte Geräuschverhalten zu verbessern. Diese Aufgabe wird durch die im Anspruch 1 gekennzeichnete Pumpe dadurch gelöst, daß der auf der gegenüberliegenden Seite eines Lagergehäuses angeordnete topfförmige Gehäusedeckel axial verlängert ist und einen Tilger zum Dämpfen von Schwingungen enthält. Die Integration des Tilgers in den Deckel beansprucht nur wenig zusätzlichen Raum, stellt aber eine preisgünstige, raumsparende Lösung zur wirksamen Pulsationsdämpfung dar. In diesem Tilger wird ein Kolben angeordnet.The invention is based on such a design Vane pump and has the task of that through the Caused pulsations and pressure fluctuations To improve noise behavior. This object is achieved by the pump characterized in claim 1 solved that the arranged on the opposite side of a bearing housing Pot-shaped housing cover is axially extended and a damper for damping Contains vibrations. Integration of the absorber in the lid takes up little additional space, but provides an inexpensive, space-saving solution for effective pulsation damping. In this absorber a piston arranged.

Vorteilhafte Ausführungsformen und weitere Tilgerausführungen sind in den Ansprüchen 2 bis 7 angegeben.Advantageous embodiments and further damper designs are in the Claims 2 to 7 specified.

Der außerdem im Gehäuse vorgesehene Fortsatz dient einer Steuerplatte mitsamt dem Pumpenpaket zur Abstützung unter Hochdruck und damit zur guten Abdichtung. So kann auf dem Fortsatz zur noch besseren Wirkung des Tilgers ein durch eine Feder belasteter Kolben geführt und der durch den Kolben entstehende rückwärtige Raum durch eine Dämpfungsbohrung im Fortsatz entlastet sein. Anstelle durch eine Feder kann der Kolben auch gegen einen Dichtring abgefedert sein. Dies ergibt eine besonders preiswerte Dämpfereinrichtung.The extension also provided in the housing serves as a control plate together with the pump package for support under high pressure and thus for good sealing. So can on the extension for even better effect Tilgers a piston loaded by a spring and the piston resulting rear space is relieved by a damping hole in the extension his. Instead of a spring, the piston can also be used against a sealing ring be cushioned. This results in a particularly inexpensive damper device.

Nach einem Nebenanspruch befindet sich in dem Tilger ein Kolben, in welchem mehrere elastische Glieder eingesetzt sind. Der Kolben stützt sich in dieser Ausführungsform an einer abgedichteten Gehäusekante ab und schafft auf seiner Rückseite einen entlasteten Raum. Vorzugsweise sind als elastische Glieder kegelige Stopfen einem Elastomer in entsprechende Aussparungen eingesetzt, die sich in Richtung auf den entlasteten Raum verjüngen. Es hat sich gezeigt, daß sich die elastischen Glieder zu einer weiter verbesserten Schwingungsdämpfung eignen.According to a secondary claim, there is a piston in the absorber which several elastic links are used. The piston is supported in this Embodiment on a sealed edge of the housing and creates on it Back of a relieved room. Are preferably as elastic members conical plugs an elastomer inserted into corresponding recesses that taper towards the relieved space. It has shown, that the elastic members improved further Vibration damping are suitable.

Nach einem weiteren Nebenanspruch befindet sich in dem Kolben eine Ringnut mit einem elastischen Ring. Die Ringnut ist über kleine Bohrungen mit einem entlasteten Raum verbunden. Durch Verdrängen des elastischen Ringes in die kleinen Bohrungen erreicht man gute Ergebnisse zur Senkung von Druckschwingungen.According to another subsidiary claim is in the Piston an annular groove with an elastic ring. The ring groove is connected to a relieved room via small holes. By displacing the elastic ring in the small bores will achieve good countersinking results of pressure vibrations.

Im folgenden wird die Erfindung anhand mehrerer in der Zeichnung dargestellter Ausführungsbeispiele näher erläutert.
Es zeigen:

Fig. 1
einen Teil-Querschnitt durch einen Gehäusedeckel der erfindungsgemäßen Flügelzellenpumpe mit einem Tilgerraum;
Fig. 2
einen Teil-Querschnitt nach Fig. 1 mit einem abgefederten Kolben;
Fig. 3 und 4
Teil-Querschnitte entsprechend Fig. 1, in denen der Kolben gegen elastische Ringe abgefedert ist;
Fig. 5
einen Teil-Querschnitt nach Fig. 1, in dem der Kolben elastische Glieder enthält und
Fig. 6
einen Teil-Querschnitt nach Fig. 1 mit einem in eine Ringnut eines Kolbens eingesetzten elastischen Ring.
The invention is explained in more detail below with reference to several exemplary embodiments shown in the drawing.
Show it:
Fig. 1
a partial cross section through a housing cover of the vane pump according to the invention with an absorber chamber;
Fig. 2
a partial cross section of Figure 1 with a sprung piston.
3 and 4
Partial cross-sections corresponding to Figure 1, in which the piston is cushioned against elastic rings.
Fig. 5
a partial cross section of FIG. 1, in which the piston contains elastic members and
Fig. 6
a partial cross section of FIG. 1 with an elastic ring inserted into an annular groove of a piston.

Die Flügelzellenpumpe weist einen Aufbau entsprechend der DE 44 16 077 A1 auf und ist nachfolgend nur an den für das Verständnis wichtigsten Bauteilen beschrieben.The vane pump has a corresponding structure DE 44 16 077 A1 and is only for the following understanding the most important components.

In einem Druckraum 1 eines Gehäusedeckels 2 ist ein Pumpenpaket 3 eingesetzt. Ein Rotor 4 ist über eine Antriebswelle 5 in einem Lagergehäuse 2A abgestützt. Die Lagerstelle in dem Lagergehäuse 2A ist die alleinige Lagerung der Antriebswelle 5. Die Antriebswelle 5 stützt sich zweckmäßig in axialer Richtung nur an einem Fortsatz 6 des Gehäusedeckels 2 ab. Eine Dichtung 7 dichtet gegen den Hochdruck ab. Der Gehäusedeckel 2 ist durch Schrauben 8 am Lagergehäuse 2A befestigt. Das Pumpenpaket 3 weist in radialen Schlitzen des Rotors 4 geführte Arbeitsschieber 10 auf, die in einem Kurvenring 11 beim Umlaufen eine Hubbewegung ausführen. Zwischen dem Kurvenring 11, dem Rotor 4, den Arbeitsschiebern 10 und seitlichen Steuerplatten 12, 13 befinden sich Arbeitskammern. Nach der Erfindung ist der Gehäusedeckel 2 so erweitert, daß im Bereich des Fortsatzes 6 ein mit dem Druckraum 1 verbundener Tilger 14 entsteht. Diesen Tilger 14 wählt man so groß, daß Druckschwingungen der Flügelzellenpumpe wirksam gedämpft werden. Bei arbeitender Pumpe wird das gesamte Pumpenpaket 3 durch den Hochdruck vorteilhaft nach rechts gegen den Fortsatz 6 gedrückt, wodurch eine gute Spaltdichtung zwischen dem Pumpenpaket 3 und den Steuerplatten 12, 13 gesichert ist.In a pressure chamber 1 of a housing cover 2 is a Pump package 3 used. A rotor 4 is via a drive shaft 5 supported in a bearing housing 2A. The depository in the bearing housing 2A is the sole storage the drive shaft 5. The drive shaft 5 is appropriately supported in the axial direction only on an extension 6 of the housing cover 2 from. A seal 7 seals against the high pressure from. The housing cover 2 is by screws 8 on the bearing housing 2A attached. The pump package 3 has radial Slots of the rotor 4 guided working slide 10, which in a cam ring 11 when rotating a lifting movement To run. Between the cam ring 11, the rotor 4, the Working valves 10 and side control plates 12, 13 there are working chambers. According to the invention Housing cover 2 expanded so that in the area of the extension 6 a damper 14 connected to the pressure chamber 1 is formed. This absorber 14 is chosen so large that pressure fluctuations the vane pump can be effectively damped. at working pump, the entire pump package 3 by the High pressure advantageously pressed to the right against the extension 6, creating a good gap seal between the pump package 3 and the control plates 12, 13 is secured.

Die Fig. 2 zeigt eine Ausführungsform mit einem zusätzlichen Ringkolben 15, der auf einem Fortsatz 16 geführt ist. Der Ringkolben 15 ist in einem Tilger 17 angeordnet und zwischen dem Gehäusedeckel 2 und dem Fortsatz 16 abgedichtet (nicht dargestellt). Eine Feder 18 dämpft die Kolbenbewegungen. In dem Fortsatz 16 befindet sich noch eine Dämpfungsbohrung 20 mit engem Querschnitt. Mit einer derartigen Anordnung lassen sich auch starke Druckschwankungen zuverlässig dämpfen.Fig. 2 shows an embodiment with an additional Ring piston 15, which is guided on an extension 16 is. The annular piston 15 is arranged in an absorber 17 and sealed between the housing cover 2 and the extension 16 (not shown). A spring 18 dampens the piston movements. There is another in extension 16 Damping bore 20 with a narrow cross section. With such a Large pressure fluctuations can also be arranged steam reliably.

Nach Fig. 3 und 4 ist es zweckmäßig, anstelle der Feder 18, je nach Anwendung, einen im Querschnitt vollen 0-Dichtring 23 oder einen Hohlkammer-Dichtring 24 vorzusehen.3 and 4, it is useful instead of the spring 18, depending on the application, a full O-ring in cross section 23 or to provide a hollow chamber sealing ring 24.

Fig. 5 zeigt eine weitere Ausführungsform eines Tilgers 17A mit kegeligen Gliedern 25 in einem Kolben 26. Die kegeligen Glieder 25 sind elastisch und nehmen die Druckschwankungen so auf, daß diese sich mehr oder weniger in kegelige Aussparungen 27 verdrängen lassen. Die Glieder 25 verjüngen sich in Richtung auf einen entlasteten Raum 28 hinter dem Kolben 26. Der entlastete Raum 28 ist durch eine Gehäusekante 2B gebildet, an der der Kolben 26 anliegt. Ein Pumpenpaket 3A ist an dem Kolben 26 abgestützt. Der Raum 28 ist über eine Dämpfungsbohrung 30 an den entlasteten Stirnraum 31 angeschlossen.5 shows a further embodiment of a damper 17A with tapered links 25 in a piston 26. Die tapered members 25 are elastic and take the pressure fluctuations so that these are more or less in Allow conical recesses 27 to be displaced. Links 25 taper towards a relieved space 28 behind the piston 26. The relieved space 28 is through a Formed housing edge 2B against which the piston 26 abuts. On Pump package 3A is supported on the piston 26. The room 28 is via a damping bore 30 to the unloaded front space 31 connected.

In Fig. 6 ist eine Variante mit einem in einem Tilger 32 angeordneten Kolben 33 gezeichnet. Der Kolben 33 enthält in einer Ringnut 34 einen elastischen Ring 35. Ein rückseitiger Raum 28A ist durch eine Dämpfungsbohrung 30A entlastet. In der Auflagefläche des elastischen Rings sind kleine Bohrungen 36 eingearbeitet, die wiederum als Verdrängungsraum für den Ring 35 dienen.6 is a variant with one in an absorber 32 arranged pistons 33 drawn. The piston 33 contains an elastic ring 35 in an annular groove 34 back space 28A is through a damping hole 30A relieved. Are in the contact surface of the elastic ring small holes 36 incorporated, which in turn as displacement space serve for the ring 35.

Bei den Ausführungsformen der Fig. 3 bis 6 kommen als elastische Glieder zweckmäßig Elastomere zur Anwendung. In the embodiments of FIGS. 3 to 6 come as elastic members expediently use elastomers.

Bezugszeichenreference numeral

11
Druckraumpressure chamber
22
Gehäusedeckelhousing cover
2A2A
Lagergehäusebearing housing
2B2 B
Gehäusekantehousing edge
33
Pumpenpaketpump package
3A3A
Pumpenpaketpump package
44
Rotorrotor
55
Antriebswelledrive shaft
66
Fortsatzextension
77
Dichtungpoetry
88th
Schraubescrew
99
--
1010
Arbeitsschieberworking slide
1111
Kurvenringcam ring
1212
Steuerplattecontrol plate
1313
Steuerplattecontrol plate
1414
Tilgerabsorber
1515
Ringkolbenannular piston
1616
Fortsatzextension
1717
Tilgerabsorber
17A17A
Tilgerabsorber
1818
Federfeather
1919
--
2020
Dämpfungsbohrungdamping hole
2121
--
2222
--
2323
0-Dichtring0-ring
2424
Hohlkammer-DichtringHollow chamber seal
2525
elastische Gliederelastic links
2626
Kolbenpiston
2727
Aussparungenrecesses
2828
Raum (entlastet)Space (relieved)
28A28A
Raum (entlastet)Space (relieved)
2929
--
3030
Dämpfungsbohrungdamping hole
30A30A
Dämpfungsbohrungdamping hole
3131
Stirnraumfront room
3232
Tilgerabsorber
3333
Kolbenpiston
3434
Ringnutring groove
3535
elastischer Ringelastic ring
3636
kleinesmall

Claims (7)

  1. Vane cell pump for conveying pressurized oil out of a reservoir to a consumer, having the following features:
    a pump assembly (3; 3A), comprising a rotor (4), a plurality of work slides (10) and a cam ring (11), is inserted in an interior of a cup-shaped housing lid (2);
    work chambers which are subdivided by the work slide (10) are formed between the cam ring (11) and the rotor (4), which work chambers are delimited in the axial direction by control plates (12, 13);
    the cup-shaped housing lid (2) is adjoined on one side by a bearing housing (2A) which contains vacuum and pressure ducts which connect the work chambers to the vacuum connection, a flow-regulating valve and a pressure-limiting valve,
    characterized by the following features:
    the cup-shaped housing lid (2) is extended axially on the other side and contains an absorber (14; 17; 17A or 32) for damping vibrations, and
    a plunger (15; 26; 33) is integrated in the absorber (14; 17; 17A or 32).
  2. Vane cell pump according to Claim 1, characterized in that the housing lid (2) bears an inwardly protruding projection (6 or 16) to support the pump assembly (3).
  3. Vane cell pump according to Claim 2, characterized in that a plunger (15) which is loaded by a spring (18) is guided on the projection (6, 16) and a rear chamber is relieved by a damping hole (20).
  4. Vane cell pump according to Claim 3, characterized in that the plunger (15) is cushioned against a sealing ring (23, 24).
  5. Vane cell pump according to Claim 1, characterized by the following features:
    a plunger (26) is situated in the absorber (17A), the rear chamber (28) of the said plunger (26) being relieved through a damping hole (30);
    a plurality of elastic members (25) are situated in the plunger (26), and
    the plunger (26) supports the pump assembly (3A) via a housing edge (2B).
  6. Vane cell pump according to Claim 5, characterized by the following features:
    the elastic members (25) are conical plugs made of plastic which are inserted into corresponding cut-outs (27), and
    the elastic members (25) taper in the direction of the rear chamber (28) which lies between the plunger (26) and the housing lid (2).
  7. Vane cell pump according to Claim 1, characterized by the following features:
    a plunger (33) having an annular groove (34) is situated in the absorber (32), in which annular groove (34) an elastic washer (35) is inserted;
    the annular groove (34) contains small holes (36) into which the elastic washer (35) can partially penetrate, and
    a rear chamber (28A) of the plunger (33) is relieved through a damping hole (30A).
EP97919011A 1996-09-04 1997-08-29 Vane cell pump Expired - Lifetime EP0925453B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19635801A DE19635801B4 (en) 1996-09-04 1996-09-04 High pressure pump with working slides
DE19635801 1996-09-04
PCT/EP1997/004713 WO1998010192A1 (en) 1996-09-04 1997-08-29 Vane cell pump

Publications (2)

Publication Number Publication Date
EP0925453A1 EP0925453A1 (en) 1999-06-30
EP0925453B1 true EP0925453B1 (en) 2004-06-30

Family

ID=7804550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97919011A Expired - Lifetime EP0925453B1 (en) 1996-09-04 1997-08-29 Vane cell pump

Country Status (5)

Country Link
US (1) US6095773A (en)
EP (1) EP0925453B1 (en)
JP (1) JP2000517398A (en)
DE (1) DE19635801B4 (en)
WO (1) WO1998010192A1 (en)

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Also Published As

Publication number Publication date
EP0925453A1 (en) 1999-06-30
DE19635801B4 (en) 2005-04-28
WO1998010192A1 (en) 1998-03-12
US6095773A (en) 2000-08-01
DE19635801A1 (en) 1998-03-05
JP2000517398A (en) 2000-12-26

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