EP0760907B1 - Vane cell pump - Google Patents

Vane cell pump Download PDF

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Publication number
EP0760907B1
EP0760907B1 EP95919993A EP95919993A EP0760907B1 EP 0760907 B1 EP0760907 B1 EP 0760907B1 EP 95919993 A EP95919993 A EP 95919993A EP 95919993 A EP95919993 A EP 95919993A EP 0760907 B1 EP0760907 B1 EP 0760907B1
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EP
European Patent Office
Prior art keywords
bearing housing
housing
housing cover
rotor
connection
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Expired - Lifetime
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EP95919993A
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German (de)
French (fr)
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EP0760907A1 (en
Inventor
Johann Merz
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ZF Friedrichshafen AG
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ZF Friedrichshafen AG
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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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • 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
    • F04C2/3446—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 the inner and outer member being in contact along more than one line or surface

Definitions

  • the invention relates to a vane pump for conveying a pressure medium from a container to a consumer, according to the preamble of claim 1.
  • a rotor set of the vane pump contains a cam ring, in which a rotor is rotatably inserted.
  • the rotor has radially directed slots in which blades are slidably inserted.
  • Working chambers are formed between the cam ring, the rotor and the vanes, which are delimited in the axial direction by control surfaces of adjacent control plates.
  • the rotor set is inserted into a pressure-filled interior of a housing, which consists of a bearing housing and a housing cover.
  • the rotor is mounted in the bearing housing by means of a drive shaft which is supported on the housing cover in an axial direction.
  • a suction connection for the connection of the container and a pressure connection for the connection of the consumer are arranged in the bearing housing.
  • a flow control valve is arranged in the bearing housing for the control of the pressure medium delivered to the pressure connection.
  • a pressure relief valve is arranged in the bearing housing. Suction and pressure channels, which connect the working chambers with the suction connection, the flow control valve and the pressure relief valve, are also arranged in the bearing housing.
  • Such a vane pump is known for example from US-A-5 098 259.
  • This pump has a very compact design.
  • a cylindrical fit between the housing cover and the bearing housing results in an expansion of the housing cover in this area.
  • the fitting must be carried out very precisely since the drive shaft has a second bearing in a control plate in addition to its bearing point in the bearing housing, and this in turn in the Housing cover is centered.
  • the production of the different fitting points incurs considerable manufacturing costs. Additional costs arise in the assembly of the bearing housing and housing cover in that a seal between the two parts must be fitted very carefully so that it is not sheared off when the housing cover is pushed over the bearing housing.
  • the invention has for its object to improve the known pump such that the manufacturing and assembly costs can be reduced.
  • the vane pump characterized in claim 1 in that the drive shaft is supported in the radial direction exclusively in the bearing housing and no longer in the control plate. This eliminates the need to fit the control plate into the housing cover. Both the bearing housing and the housing cover have flat connection surfaces. A cylindrical fit is avoided. The housing cover is only centered on the bearing housing by screws with which it is attached to the bearing housing. The cam ring is also centered exclusively on the bearing housing.
  • the seal between the housing cover and the bearing housing can be done with a simple flat gasket.
  • a simple flat gasket Appropriately, however, it will be designed as an O-ring in an annular groove in one of the two flat surfaces of the housing cover or bearing housing.
  • the vane pump is used to convey a pressure medium from a container, not shown, to a consumer, not shown, which is formed, for example, by an auxiliary power steering system.
  • a rotor set 3 is used in a pressure medium-filled interior 1 of a housing 2.
  • the rotor set 3 consists of a cam ring 4 and a rotor 5.
  • the rotor 5 is arranged in the interior of the cam ring 4 and has radially directed slots in which blades 6 are slidably inserted. Between the curve ring 4, the rotor 5 and the vanes 6, working chambers are formed which are delimited in the axial direction by control surfaces of adjacent control plates 7 and 8.
  • the housing 2 is composed of a bearing housing 10 and a cup-shaped housing cover 11.
  • the rotor 5 is mounted in the bearing housing 10 via a drive shaft 12.
  • the bearing point in the bearing housing 10 is the only bearing of the drive shaft 12. This means that the drive shaft 12 is not supported in the housing cover 11 in the radial direction. Rather, the drive shaft 12 is supported on the housing cover 11 only in the axial direction.
  • the bearing housing 10 All the essential functional features of the vane pump are contained in the bearing housing 10: in the bearing housing 10 there is a suction connection 13 for the connection of the container and a pressure connection 14 for the connection of the consumer.
  • a flow control valve 15 is also arranged in the bearing housing 10 for the control of the pressure medium delivered to the pressure connection 14.
  • a pressure relief valve 16 is also contained in the bearing housing 10.
  • the design of the flow control valve 15 and the pressure relief valve 16 is generally known, for example from US-A-5 098 259, and is therefore not described in detail.
  • Suction and pressure channels, which connect the working chambers to the suction connection 13, the flow control valve 15 and the pressure relief valve 16, are likewise arranged in the bearing housing 10. These channels are also generally known and are therefore not described in detail.
  • the pressure limiting valve 16 can be integrated in the flow control valve 15. In the preferred embodiment, however, the two valves are arranged separately from one another.
  • the bearing housing 10 has a flat surface 17 on its side facing the housing cover 11.
  • the housing cover 11 has a flat surface 18 on its side facing the bearing housing 10.
  • a seal preferably in the form of an O-ring 20, which is inserted in an annular groove open in the axial direction in the bearing housing 10 or in the housing cover 11.
  • the two housing parts, bearing housing 10 and housing cover 11, have very simple shapes and can therefore be essentially pre-cast or prefabricated using the die-casting method.
  • the housing cover 11 is fastened to the bearing housing 10 by screws 21 and is centered on the bearing housing 10 only by the screws 21. A further centering of the two parts with respect to one another is not necessary since no other parts are adjusted or centered in the housing cover 11.
  • the drive shaft 12 is only supported in the radial direction in the bearing housing 10 and is supported only in the axial direction on the housing cover 11. In the pulling direction, the drive shaft 12 is held axially via a locking ring 22, the rotor 5 and the control plate 7.
  • sealing ring 23 Between the housing cover 11 and the control plate 8 there is only one sealing ring 23, which on the one hand separates the interior space 1 which is subjected to high pressure from the drive shaft 12 and on the other hand, as an elastic member between the housing cover 11 and the control plate 8, ensures gap compensation.
  • the sealing ring 23 has the task of pressing the control plate 8, the cam ring 4 and the control plate 7 onto the surface 18 when the pump is at a standstill in order to Compensate manufacturing tolerances.
  • the screws 21 are located outside the interior 1, so that no additional sealing is required in this area.
  • cam ring 4 and the control plates 7 and 8 are centered on the bearing housing 10 by two pins known per se and therefore not described in detail. Further centering is not necessary.
  • the structure of the vane pump according to the invention enables very simple assembly: the various parts only have to be stacked on top of one another and then screwed together.
  • the O-ring 20 cannot be sheared off during assembly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

All the essential components and operative features in a vane cell pump for conveying a pressure medium from a tank to a consumer are fitted in a bearing housing (10): an intake union (13) for the connection of the tank, a delivery union (14) for the connection of the consumer, a flow control valve (15) to control the pressure medium conveyed to the delivery union (14), a pressure limiting valve (16) and intake and delivery channels connecting the working chambers to the intake union (13), the flow control valve (15) and the pressure limiting valve (16). In the bearing housing (10) there is also the individual radial bearing point of a drive shaft (12) by means of which a rotor (5) is supported in a cam ring (4). Between the cam ring (4), the rotor (5) and the vanes (6) inserted in it are formed working chambers which are bounded axially by two control plates (7, 8). Opposite its adjacent control plate (7), the bearing housing (10) has a flat surface (17) on which fits a flat surface (18) of a housing cover (11). The housing cover (11) is secured to and centred on the bearing housing (10) by screws (21) only. As neither the control plate (8) nor the drive shaft (11) is centred or borne in the housing cover (11), the simple centring of the housing cover (11) by the screws (21) is sufficient.

Description

Die Erfindung betrifft eine Flügelzellenpumpe zum Fördern eines Druckmittels aus einem Behälter zu einem Verbraucher, nach dem Oberbegriff des Anspruches 1. Ein Rotorensatz der Flügelzellenpumpe enthält einen Kurvenring, in den ein Rotor drehbar eingesetzt ist. Der Rotor weist radial gerichtete Schlitze auf, in denen Flügel verschiebbar eingesetzt sind. Zwischen dem Kurvenring, dem Rotor und den Flügeln sind Arbeitskammern gebildet, die von Steuerflächen benachbarter Steuerplatten in axialer Richtung begrenzt sind. Der Rotorensatz ist in einen druckmittelgefüllten Innenraum eines Gehäuses eingesetzt, das aus einem Lagergehäuse und einem Gehäusedeckel besteht. In dem Lagergehäuse ist der Rotor mittels einer Antriebswelle gelagert, die sich in einer axialen Richtung an dem Gehäusedeckel abstützt. In dem Lagergehäuse sind ein Sauganschluß für den Anschluß des Behälters und ein Druckanschluß für den Anschluß des Verbrauchers angeordnet. In dem Lagergehäuse ist ein Stromregelventil angeordnet für die Regelung des zu dem Druckanschluß geförderten Druckmittels. Außerdem ist in dem Lagergehäuse ein Druckbegrenzungsventil angeordnet. Saug- und Druckkanäle, die die Arbeitskammern mit dem Sauganschluß, dem Stromregelventil und dem Druckbegrenzungsventil verbinden, sind ebenfalls in dem Lagergehäuse angeordnet.The invention relates to a vane pump for conveying a pressure medium from a container to a consumer, according to the preamble of claim 1. A rotor set of the vane pump contains a cam ring, in which a rotor is rotatably inserted. The rotor has radially directed slots in which blades are slidably inserted. Working chambers are formed between the cam ring, the rotor and the vanes, which are delimited in the axial direction by control surfaces of adjacent control plates. The rotor set is inserted into a pressure-filled interior of a housing, which consists of a bearing housing and a housing cover. The rotor is mounted in the bearing housing by means of a drive shaft which is supported on the housing cover in an axial direction. A suction connection for the connection of the container and a pressure connection for the connection of the consumer are arranged in the bearing housing. A flow control valve is arranged in the bearing housing for the control of the pressure medium delivered to the pressure connection. In addition, a pressure relief valve is arranged in the bearing housing. Suction and pressure channels, which connect the working chambers with the suction connection, the flow control valve and the pressure relief valve, are also arranged in the bearing housing.

Eine derartige Flügelzellenpumpe ist beispielsweise bekannt aus der US-A-5 098 259. Diese Pumpe weist eine sehr kompakte Bauform auf. Ein zylindrischer Einpaß zwischen dem Gehäusedeckel und dem Lagergehäuse ergibt jedoch eine Aufweitung des Gehäusedeckels in diesem Bereich. Der Einpaß muß sehr genau ausgeführt sein, da die Antriebswelle neben ihrer Lagerstelle in dem Lagergehäuse eine zweite Lagerung in einer Steuerplatte aufweist und diese wiederum in dem Gehäusedeckel zentriert ist. Durch die Herstellung der verschiedenen Einpaßstellen entstehen erhebliche Fertigungskosten. Weitere Kosten entstehen bei dem Zusammenbau von Lagergehäuse und Gehäusedeckel dadurch, daß eine Dichtung zwischen den beiden Teilen sehr sorgfältig montiert werden muß, damit sie nicht beim Überschieben des Gehäusedeckels über das Lagergehäuse abgeschert wird.Such a vane pump is known for example from US-A-5 098 259. This pump has a very compact design. However, a cylindrical fit between the housing cover and the bearing housing results in an expansion of the housing cover in this area. The fitting must be carried out very precisely since the drive shaft has a second bearing in a control plate in addition to its bearing point in the bearing housing, and this in turn in the Housing cover is centered. The production of the different fitting points incurs considerable manufacturing costs. Additional costs arise in the assembly of the bearing housing and housing cover in that a seal between the two parts must be fitted very carefully so that it is not sheared off when the housing cover is pushed over the bearing housing.

Der Erfindung liegt die Aufgabe zugrunde, die bekannte Pumpe derart zu verbessern, daß die Fertigungs- und Montagekosten reduziert werden können.The invention has for its object to improve the known pump such that the manufacturing and assembly costs can be reduced.

Diese Aufgabe wird durch die im Anspruch 1 gekennzeichnete Flügelzellenpumpe dadurch gelöst, daß die Antriebswelle in radialer Richtung ausschließlich in dem Lagergehäuse und nicht mehr in der Steuerplatte gelagert ist. Dadurch kann der Einpaß der Steuerplatte in dem Gehäusedeckel entfallen. Sowohl das Lagergehäuse als auch der Gehäusedeckel weisen ebene Anschlußflächen auf. Ein zylindrischer Einpaß wird vermieden. Der Gehäusedeckel wird zu dem Lagergehäuse ausschließlich durch Schrauben zentriert, mit denen er am Lagergehäuse befestigt ist. Der Kurvenring wird ebenfalls ausschließlich zu dem Lagergehäuse zentriert.This object is achieved by the vane pump characterized in claim 1 in that the drive shaft is supported in the radial direction exclusively in the bearing housing and no longer in the control plate. This eliminates the need to fit the control plate into the housing cover. Both the bearing housing and the housing cover have flat connection surfaces. A cylindrical fit is avoided. The housing cover is only centered on the bearing housing by screws with which it is attached to the bearing housing. The cam ring is also centered exclusively on the bearing housing.

Zweckmäßige und vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen angegeben. Die Erfindung ist jedoch nicht auf die Merkmalskombinationen der Ansprüche beschränkt. Für den Fachmann ergeben sich weitere sinnvolle Kombinationsmöglichkeiten von Ansprüchen und einzelnen Anspruchsmerkmalen aus der Aufgabenstellung.Expedient and advantageous embodiments of the invention are specified in the subclaims. However, the invention is not limited to the combinations of features of the claims. For the specialist, there are further useful combinations of claims and individual claim characteristics from the task.

Bei der bekannten Flügelzellenpumpe gehen die Schrauben, mit denen der Gehäusedeckel an dem Lagergehäuse befestigt ist, durch den druckmittelgefüllten Innenraum hindurch. Jeder einzelne Durchtritt der Schrauben durch den Gehäusedeckel muß deshalb gesondert abgedichtet werden. Diese zusätzlichen Dichtungen können bei der erfindungsgemäßen Flügelzellenpumpe dadurch entfallen, daß die Schrauben zur Befestigung des Gehäusedeckels an dem Lagergehäuse außerhalb des Innenraumes der Flügelzellenpumpe angeordnet sind.In the known vane pump, the screws with which the housing cover is fastened to the bearing housing pass through the pressure-filled interior. Every single passage of the screws through the The housing cover must therefore be sealed separately. These additional seals can be dispensed with in the vane pump according to the invention in that the screws for fastening the housing cover to the bearing housing are arranged outside the interior of the vane pump.

Die Dichtung zwischen Gehäusedeckel und Lagergehäuse kann durch eine einfache Flachdichtung erfolgen. Zweckmäßigerweise wird sie jedoch als O-Ring in einer Ringnut in einer der beiden ebenen Flächen von Gehäusedeckel oder Lagergehäuse ausgebildet sein.The seal between the housing cover and the bearing housing can be done with a simple flat gasket. Appropriately, however, it will be designed as an O-ring in an annular groove in one of the two flat surfaces of the housing cover or bearing housing.

Im folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Es zeigen:

Fig. 1
einen Längsschnitt durch die erfindungsgemäße Flügelzellenpumpe und
Fig. 2
eine Draufsicht auf die Flügelzellenpumpe gemäß dem Pfeil II in Fig. 1, mit Teilausschnitten.
The invention is explained in more detail below with reference to an embodiment shown in the drawing. Show it:
Fig. 1
a longitudinal section through the vane pump according to the invention and
Fig. 2
a plan view of the vane pump according to the arrow II in Fig. 1, with partial cutouts.

Die Flügelzellenpumpe dient zum Fördern eines Druckmittels aus einem nicht dargestellten Behälter zu einem nicht dargestellten Verbraucher, der beispielsweise durch eine Hilfskraftlenkung gebildet wird.The vane pump is used to convey a pressure medium from a container, not shown, to a consumer, not shown, which is formed, for example, by an auxiliary power steering system.

In einem druckmittelgefüllten Innenraum 1 eines Gehäuses 2 ist ein Rotorensatz 3 eingesetzt. Der Rotorensatz 3 besteht aus einem Kurvenring 4 und einem Rotor 5. Der Rotor 5 ist im Inneren des Kurvenringes 4 angeordnet und weist radial gerichtete Schlitze auf, in denen Flügel 6 verschiebbar eingesetzt sind. Zwischen dem Kurvenring 4, dem Rotor 5 und den Flügeln 6 sind Arbeitskammern gebildet, die von Steuerflächen benachbarter Steuerplatten 7 und 8 in axialer Richtung begrenzt sind.A rotor set 3 is used in a pressure medium-filled interior 1 of a housing 2. The rotor set 3 consists of a cam ring 4 and a rotor 5. The rotor 5 is arranged in the interior of the cam ring 4 and has radially directed slots in which blades 6 are slidably inserted. Between the curve ring 4, the rotor 5 and the vanes 6, working chambers are formed which are delimited in the axial direction by control surfaces of adjacent control plates 7 and 8.

Das Gehäuse 2 ist aus einem Lagergehäuse 10 und einem topfförmigen Gehäusedeckel 11 zusammengesetzt. Der Rotor 5 ist über eine Antriebswelle 12 in dem Lagergehäuse 10 gelagert. Die Lagerstelle in dem Lagergehäuse 10 ist die einzige Lagerung der Antriebswelle 12. Dies bedeutet, daß die Antriebswelle 12 in dem Gehäusedeckel 11 in radialer Richtung nicht gelagert ist. Die Antriebswelle 12 stützt sich vielmehr an dem Gehäusedeckel 11 nur in axialer Richtung ab.The housing 2 is composed of a bearing housing 10 and a cup-shaped housing cover 11. The rotor 5 is mounted in the bearing housing 10 via a drive shaft 12. The bearing point in the bearing housing 10 is the only bearing of the drive shaft 12. This means that the drive shaft 12 is not supported in the housing cover 11 in the radial direction. Rather, the drive shaft 12 is supported on the housing cover 11 only in the axial direction.

Alle wesentlichen Funktionsmerkmale der Flügelzellenpumpe sind in dem Lagergehäuse 10 enthalten: In dem Lagergehäuse 10 ist ein Sauganschluß 13 für den Anschluß des Behälters sowie ein Druckanschluß 14 für den Anschluß des Verbrauchers angeordnet. Ebenso ist in dem Lagergehäuse 10 ein Stromregelventil 15 angeordnet für die Regelung des zu dem Druckanschluß 14 geförderten Druckmittels. Auch ein Druckbegrenzungsventil 16 ist in dem Lagergehäuse 10 enthalten. Die Ausbildung des Stromregelventils 15 und des Druckbegrenzungsventils 16 ist allgemein bekannt, beispielsweise aus der US-A-5 098 259, und wird deshalb nicht näher beschrieben. Ebenso sind Saug- und Druckkanäle, die die Arbeitskammern mit dem Sauganschluß 13, dem Stromregelventil 15 und dem Druckbegrenzungsventil 16 verbinden, in dem Lagergehäuse 10 angeordnet. Auch diese Kanäle sind allgemein bekannt und werden deshalb nicht näher beschrieben.All the essential functional features of the vane pump are contained in the bearing housing 10: in the bearing housing 10 there is a suction connection 13 for the connection of the container and a pressure connection 14 for the connection of the consumer. A flow control valve 15 is also arranged in the bearing housing 10 for the control of the pressure medium delivered to the pressure connection 14. A pressure relief valve 16 is also contained in the bearing housing 10. The design of the flow control valve 15 and the pressure relief valve 16 is generally known, for example from US-A-5 098 259, and is therefore not described in detail. Suction and pressure channels, which connect the working chambers to the suction connection 13, the flow control valve 15 and the pressure relief valve 16, are likewise arranged in the bearing housing 10. These channels are also generally known and are therefore not described in detail.

Das Druckbegrenzungsventil 16 kann in dem Stromregelventil 15 integriert sein. In dem bevorzugten Ausführungsbeispiel sind die beiden Ventile jedoch getrennt voneinander angeordnet.The pressure limiting valve 16 can be integrated in the flow control valve 15. In the preferred embodiment, however, the two valves are arranged separately from one another.

Das Lagergehäuse 10 weist an seiner dem Gehäusedeckel 11 zugewandten Seite eine ebene Fläche 17 auf. Ebenso weist der Gehäusedeckel 11 an seiner dem Lagergehäuse 10 zugewandten Seite eine ebene Fläche 18 auf. Zwischen den beiden ebenen Flächen 17 und 18 befindet sich eine Dichtung, vorzugsweise in der Form eines O-Ringes 20, der in einer in axialer Richtung offenen Ringnut in dem Lagergehäuse 10 oder in dem Gehäusedeckel 11 eingesetzt ist.The bearing housing 10 has a flat surface 17 on its side facing the housing cover 11. Likewise, the housing cover 11 has a flat surface 18 on its side facing the bearing housing 10. Between the two flat surfaces 17 and 18 there is a seal, preferably in the form of an O-ring 20, which is inserted in an annular groove open in the axial direction in the bearing housing 10 or in the housing cover 11.

Die beiden Gehäuseteile, Lagergehäuse 10 und Gehäusedeckel 11, weisen sehr einfache Formen auf und können deshalb im wesentlichen im Druckgußverfahren vor- bzw. fertiggegossen werden.The two housing parts, bearing housing 10 and housing cover 11, have very simple shapes and can therefore be essentially pre-cast or prefabricated using the die-casting method.

Der Gehäusedeckel 11 ist an dem Lagergehäuse 10 durch Schrauben 21 befestigt und wird nur durch die Schrauben 21 zu dem Lagergehäuse 10 zentriert. Eine weitere Zentrierung der beiden Teile zueinander ist nicht erforderlich, da in dem Gehäusedeckel 11 keine sonstigen Teile justiert oder zentriert sind. Wie oben bereits beschrieben, ist die Antriebswelle 12 in radialer Richtung nur in dem Lagergehäuse 10 gelagert und stützt sich nur in axialer Richtung an dem Gehäusedeckel 11 ab. In Zugrichtung ist die Antriebswelle 12 über einen Sicherungsring 22, den Rotor 5 und die Steuerplatte 7 axial gehalten. Die Steuerplatte 8, die dem Gehäusedeckel 11 benachbart ist, muß deshalb nicht gegenüber dem Gehäusedeckel 11 zentriert sein. Zwischen dem Gehäusedeckel 11 und der Steuerplatte 8 befindet sich nur ein Dichtring 23, der einerseits den mit Hochdruck beaufschlagten Innenraum 1 von der Antriebswelle 12 trennt und andererseits als elastisches Glied zwischen dem Gehäusedeckel 11 und der Steuerplatte 8 für eine Spaltkompensation sorgt. Zusätzlich hat der Dichtring 23 die Aufgabe, im Stillstand der Pumpe die Steuerplatte 8, den Kurvenring 4 und die Steuerplatte 7 auf die Fläche 18 zu pressen, um die Fertigungstoleranzen auszugleichen. Die Schrauben 21 befinden sich außerhalb des Innenraumes 1, so daß in diesem Bereich keine zusätzliche Abdichtung erforderlich ist.The housing cover 11 is fastened to the bearing housing 10 by screws 21 and is centered on the bearing housing 10 only by the screws 21. A further centering of the two parts with respect to one another is not necessary since no other parts are adjusted or centered in the housing cover 11. As already described above, the drive shaft 12 is only supported in the radial direction in the bearing housing 10 and is supported only in the axial direction on the housing cover 11. In the pulling direction, the drive shaft 12 is held axially via a locking ring 22, the rotor 5 and the control plate 7. The control plate 8, which is adjacent to the housing cover 11, therefore does not have to be centered with respect to the housing cover 11. Between the housing cover 11 and the control plate 8 there is only one sealing ring 23, which on the one hand separates the interior space 1 which is subjected to high pressure from the drive shaft 12 and on the other hand, as an elastic member between the housing cover 11 and the control plate 8, ensures gap compensation. In addition, the sealing ring 23 has the task of pressing the control plate 8, the cam ring 4 and the control plate 7 onto the surface 18 when the pump is at a standstill in order to Compensate manufacturing tolerances. The screws 21 are located outside the interior 1, so that no additional sealing is required in this area.

Der Kurvenring 4 und die Steuerplatten 7 und 8 sind durch zwei an sich bekannte und deshalb nicht näher beschriebene Stifte zu dem Lagergehäuse 10 zentriert. Eine weitere Zentrierung ist nicht erforderlich.The cam ring 4 and the control plates 7 and 8 are centered on the bearing housing 10 by two pins known per se and therefore not described in detail. Further centering is not necessary.

Der erfindungsgemäße Aufbau der Flügelzellenpumpe ermöglicht eine sehr einfache Montage: Die verschiedenen Teile müssen nur aufeinandergestapelt und dann verschraubt werden. Der O-Ring 20 kann bei der Montage nicht abgeschert werden.The structure of the vane pump according to the invention enables very simple assembly: the various parts only have to be stacked on top of one another and then screwed together. The O-ring 20 cannot be sheared off during assembly.

BezugszeichenReference numerals

11
Innenrauminner space
22nd
Gehäusecasing
33rd
RotorensatzRotor set
44th
KurvenringCurve ring
55
Rotorrotor
66
Flügelwing
77
SteuerplatteControl plate
88th
SteuerplatteControl plate
99
--
1010th
LagergehäuseBearing housing
1111
GehäusedeckelHousing cover
1212th
Antriebswelledrive shaft
1313
SauganschlußSuction connection
1414
DruckanschlußPressure connection
1515
StromregelventilFlow control valve
1616
DruckbegrenzungsventilPressure relief valve
1717th
Flächesurface
1818th
Flächesurface
1919th
--
2020th
O-RingO-ring
2121
Schraubescrew
2222
SicherungsringCirclip
2323
DichtringSealing ring

Claims (4)

  1. Vane cell pump for delivering a pressure medium from a tank to a consumer, having the following features:
    - a rotor assembly (3) is inserted into a pressure medium-filled interior (1) of a housing (2);
    - the rotor assembly (3) comprises a cam ring (4), into which a rotor (5) is rotatably inserted;
    - the rotor (5) has radially directed slots, in which vanes (6) are displaceably inserted;
    - formed between the cam ring (4), the rotor (5) and the vanes (6) are working chambers which are delimited in an axial direction by control surfaces of adjacent control plates (7, 8);
    - the housing (1) comprises a bearing housing (10) and a pot-shaped housing cover (11);
    - the rotor (5) is supported in the bearing housing (10) by means of a drive shaft (12);
    - the drive shaft (12) is supported in an axial direction against the housing cover (11);
    - disposed in the bearing housing (10) are a suction connection (3) for connection of the tank and a discharge connection (14) for connection of the consumer;
    - disposed in the bearing housing (10) is a flow control valve (15) for controlling the pressure medium delivered to the discharge connection (14);
    - disposed in the bearing housing (10) is a pressure limiting valve (16);
    - disposed in the bearing housing (10) are suction and discharge channels which connect the working chambers to the suction connection (13), the flow control valve (15) and the pressure limiting valve (16),
    characterized in
    - that the drive shaft (12) is supported in a radial direction exclusively in the bearing housing (10);
    - that the cam ring (4) is centred exclusively in relation to the bearing housing (10);
    - that the bearing housing (10) opposite the housing cover (11) has a substantially plane surface (17);
    - that the housing cover (11) opposite the bearing housing (10) has a substantially plane surface (18);
    - that the plane surfaces (17, 18) of bearing housing (10) and housing cover (11) are directed towards one another;
    - that the housing cover (11) is centred in relation to the bearing housing (10) exclusively by means of screws (21) which fasten it to the bearing housing (10) and
    - that the interior (1) of the vane cell pump is sealed off by means of a seal disposed between the substantially plane surfaces.
  2. Vane cell pump according to claim 1, characterized in that the screws (21) for fastening the housing cover (11) to the bearing housing (10) are disposed outside of the interior (1) of the vane cell pump.
  3. Vane cell pump according to one of claims 1 or 2, characterized in that the seal disposed between the substantially plane surfaces (17, 18) takes the form of an O-ring (20) in an annular groove in one of the two surfaces (17, 18).
  4. Vane cell pump according to claim 1, characterized in that the cam ring (4) is centred in relation to the bearing housing (10) by means of two pins.
EP95919993A 1994-05-06 1995-04-29 Vane cell pump Expired - Lifetime EP0760907B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4416077A DE4416077A1 (en) 1994-05-06 1994-05-06 Vane pump
DE4416077 1994-05-06
PCT/EP1995/001645 WO1995030834A1 (en) 1994-05-06 1995-04-29 Vane cell pump

Publications (2)

Publication Number Publication Date
EP0760907A1 EP0760907A1 (en) 1997-03-12
EP0760907B1 true EP0760907B1 (en) 1997-10-29

Family

ID=6517511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95919993A Expired - Lifetime EP0760907B1 (en) 1994-05-06 1995-04-29 Vane cell pump

Country Status (7)

Country Link
US (1) US6033190A (en)
EP (1) EP0760907B1 (en)
JP (1) JP3859702B2 (en)
BR (1) BR9507706A (en)
DE (2) DE4416077A1 (en)
ES (1) ES2109823T3 (en)
WO (1) WO1995030834A1 (en)

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Publication number Priority date Publication date Assignee Title
DE102016209396A1 (en) 2016-05-31 2017-11-30 Schaeffler Technologies AG & Co. KG Pump with rolling bearing

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NL8601312A (en) 1986-05-22 1987-12-16 Bob Hoogenboom PISTON MOTOR WITH BALANCED CYLINDERS PLACED AROUND THE DRIVE SHAFT.
DE19635801B4 (en) * 1996-09-04 2005-04-28 Zahnradfabrik Friedrichshafen High pressure pump with working slides
DE19857560A1 (en) * 1997-12-23 1999-06-24 Luk Fahrzeug Hydraulik Pump unit without own bearing
DE19927400A1 (en) * 1998-06-24 1999-12-30 Luk Fahrzeug Hydraulik Hydraulic advancing unit, eg for use in vehicles
DE19832719B4 (en) * 1998-07-21 2006-10-26 Zf Friedrichshafen Ag Vane pump
DE19833374B4 (en) * 1998-07-24 2007-03-22 Zf Friedrichshafen Ag displacement
DE102005059475A1 (en) * 2005-12-13 2007-06-14 Zf Lenksysteme Gmbh Pressurizing medium supply device e.g. vane cell pump, has pressure limiting valve comprising spring unit and valve unit arranged in valve chamber that is integrated in housing and connected with pressure generating device
DE102006052996A1 (en) * 2006-11-10 2008-05-15 Zf Lenksysteme Gmbh Vane pump for steering unit of motor vehicle, has housing, outer ring and front plate centered to shaft, where front plate is provided with shaft hub that is provided with outlet for leakage oil
US7955063B2 (en) * 2008-05-19 2011-06-07 Stackpole Limited Vane pump
DE102015208643A1 (en) 2014-05-20 2015-11-26 Schaeffler Technologies AG & Co. KG Vane machine
DE102015105933B4 (en) 2015-04-17 2018-04-26 Schwäbische Hüttenwerke Automotive GmbH pump

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JPS5853690A (en) * 1981-09-25 1983-03-30 Jidosha Kiki Co Ltd Vane pump
JPS5862394A (en) * 1981-10-08 1983-04-13 Jidosha Kiki Co Ltd Oil pump
DE3579829D1 (en) * 1984-02-01 1990-10-31 Toyoda Machine Works Ltd Fluegelpumpe.
EP0151657A1 (en) * 1984-02-04 1985-08-21 Vickers Systems GmbH Vane pump, especially for power steering
WO1986001261A1 (en) * 1984-08-11 1986-02-27 Zahnradfabrik Friedrichshafen Ag Flow regulating device for a rotary piston pump
JP2840087B2 (en) * 1989-08-29 1998-12-24 株式会社ユニシアジェックス Liquid pump
JP2895169B2 (en) * 1990-06-11 1999-05-24 株式会社ユニシアジェックス Vane pump

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Publication number Priority date Publication date Assignee Title
DE102016209396A1 (en) 2016-05-31 2017-11-30 Schaeffler Technologies AG & Co. KG Pump with rolling bearing

Also Published As

Publication number Publication date
BR9507706A (en) 1997-08-19
JP3859702B2 (en) 2006-12-20
US6033190A (en) 2000-03-07
EP0760907A1 (en) 1997-03-12
WO1995030834A1 (en) 1995-11-16
JPH09512876A (en) 1997-12-22
DE4416077A1 (en) 1995-11-09
ES2109823T3 (en) 1998-01-16
DE59500922D1 (en) 1997-12-04

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