EP2035710B1 - Pump - Google Patents

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Publication number
EP2035710B1
EP2035710B1 EP07722522A EP07722522A EP2035710B1 EP 2035710 B1 EP2035710 B1 EP 2035710B1 EP 07722522 A EP07722522 A EP 07722522A EP 07722522 A EP07722522 A EP 07722522A EP 2035710 B1 EP2035710 B1 EP 2035710B1
Authority
EP
European Patent Office
Prior art keywords
pump
valve
flange
sleeve
valve sleeve
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.)
Not-in-force
Application number
EP07722522A
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German (de)
French (fr)
Other versions
EP2035710A1 (en
Inventor
Markus Meitinger
Bernd Brunsch
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.)
ixetic Bad Homburg GmbH
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ixetic Bad Homburg GmbH
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Publication date
Application filed by ixetic Bad Homburg GmbH filed Critical ixetic Bad Homburg GmbH
Publication of EP2035710A1 publication Critical patent/EP2035710A1/en
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Publication of EP2035710B1 publication Critical patent/EP2035710B1/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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump

Definitions

  • the invention relates to a pump, in particular a power steering pump for motor vehicles, having a flow control valve and a valve sleeve, which has inflow openings to the flow control valve and a pressure connection to a hydraulic consumer.
  • a pump in particular power steering pump for motor vehicles, having a flow control valve and a valve sleeve having inflow openings for flow control valve and / or a passage opening for a throttle point and a pressure connection to a hydraulic consumer, wherein the valve sleeve as inserted into the pump housing insertion sleeve is executed and is axially positioned in the pump housing by a separate from the valve sleeve securing device.
  • valve sleeve as a plug-in sleeve has the advantage that the insert sleeve can be used precisely angle-oriented in the pump housing. Furthermore, no threading forces of the thread deforming effect on the valve sleeve and on the pump housing.
  • valve sleeve has at least one transverse bore, which is positioned to a discharge bore in the pump housing. The execution of the insert sleeve thus allows the
  • transverse bore Use only a single transverse bore, since it can be positioned to be mounted to the housing and therefore not a plurality of transverse bores are necessary as in a screw-in, so that a sufficient flow cross-section can be made to Abströmbohrung the pump housing.
  • a pump is preferred in which the securing device is represented by a flange attached to the pressure line.
  • the pressure line can also be mounted in an angle-oriented manner, since the flange predetermines the direction of the pressure line and certain positions in the engine compartment of a motor vehicle can therefore be maintained.
  • a pump according to the invention is characterized in that the flange is welded or soldered or pressed or screwed to the pressure line.
  • Another pump according to the invention is characterized in that the flange has a flat mounting surface. Furthermore, a pump is preferred in which the flange has an angled mounting surface. This has the advantage that the space for a fastening means of the flange can be variably fixed to the housing.
  • a pump is preferred in which the flange mounting surface is secured by at least one screw on the pump housing. After tightening the screw so that both the hydraulic line and the Ventileinsteckhülse is attached and secured in the axial direction of the Ventileinsteckhülse.
  • Another pump according to the invention is characterized in that the securing device is represented by a caulked flange in the pump housing.
  • a further advantage of the insertion sleeve is that the insertion sleeve can be centered relative to the valve piston, in particular if the insertion sleeve has a funnel-shaped valve seat for the valve piston, whereas a Einschraubpatrone by the possible offset between the thread and the funnel-shaped valve seat to a widening of the valve bore in Housing and can lead to an offset between the valve piston and the valve seat.
  • FIG. 1 is shown in cross section a power steering pump 1 with a pump rotation group and a valve assembly. From the rotation group, a so-called control plate 3 can be seen within the pump housing 5, wherein the control plate 3 contains suction kidney 7 and pressure kidney 9 for a double-stroke vane pump. The rotor and the blades of the vane pump are not shown here.
  • a valve assembly 11 is shown, which can perform the combination function of a flow control valve and a pilot operated pressure relief valve.
  • a valve piston 15 is slidably disposed in a valve bore 13 of the pump housing 5. The valve piston 15 bears with a sealing edge 17 against an approximately funnel-shaped seat of a valve sleeve 19.
  • the valve sleeve 19 in turn is mounted insertable in an enlarged part 21 of the valve bore 13.
  • the valve sleeve 19 also has a passage opening 23, in which a partially conical pin 25 of the valve piston 15 with the passage opening 23 is a variable throttle point for the consumer oil flow.
  • the consumer oil flow is supplied through the pressure line 27 to the consumer, for example, a hydraulic power steering.
  • the pressure line 27 is inserted in the region 29 of the valve sleeve 19 and additionally provided with a seal 31.
  • the pressure line 27 also has a flange 33, which is here, for example by means of a weld on the pressure line 27, fixed and secured with a screw 35 in the housing 5.
  • a discharge bore 37 leads into the valve region, where a corresponding inflow opening 39 of the valve sleeve 19 of the discharge bore 37 is juxtaposed in the housing.
  • the valve assembly in the upper part of the housing 5 further comprises a pressure relief pilot with a pilot valve sleeve 41, in which a pilot valve cone 43 is sealingly mounted in a valve seat 45 and is pressed by a spring 47 into the valve seat.
  • a pilot valve cone 43 is sealingly mounted in a valve seat 45 and is pressed by a spring 47 into the valve seat.
  • the valve plug 43 opens by lifting itself off from the seat 45, thereby producing a pilot-operated pressure limiting valve with the valve piston 15.
  • the valve piston 15 which is pressed by a spring 49 in the sealing edge 17, as a flow control valve piston and limits the flow flowing to the consumer to a certain value.
  • Such Stromregelventil- and pressure relief valve functions are well known in the art and therefore should not be further explained here.
  • the insertion sleeve 19 can be positioned to the discharge bore 37 and, if necessary, only a single inflow opening 39 is required, whereas in the prior art several inflow openings have to be used as outflow openings in order to realize the necessary hydraulic opening cross-sections. Furthermore, acting on the valve sleeve 19 and thus also on the receiving bore 21 no screwing, which can lead to deformations and decentrations in the prior art.
  • An additional advantage provides the pressure line 27 with the welded flange 33, which can be positioned in the appropriate necessary mounting position for the eventual space in the engine compartment of a motor vehicle and thus allows a positionally correct mounting without screwing the pressure line.
  • the axial fixation on the pump housing for both the pressure line 27 and the valve sleeve 19 is effected by the separate screw 35 between the flange 33 and the pump housing fifth
  • FIG. 2 is in supervision of the flange 33 from FIG. 1 exemplified.
  • the pressure line 27 is shown cut and secured by the weld 37 on the flange 33.
  • the flange 33 is fastened in the illustrated position on the pump housing not shown here by a single screw 35.
  • the position of the flange 33 to the course of the pressure line 27, as in FIG. 1 shown, is thus set for mounting in the vehicle.
  • a flange 51 is shown with an angled mounting surface 53.
  • another surface of the housing 5 can be used as the mating surface of the pressure line 27 for mounting mounting, if no space for a screw 55 and a corresponding thread in the housing 5 is present on the entrance level of the pressure line 27.
  • FIG. 4 another variant of a valve sleeve 60 is shown.
  • the Ventileinsteckhülse 60 in this case has a flange 62, softer in FIG. 4b with 4 caulking 64 is fixed in the housing 5.
  • a corresponding positioning of inlet openings of the valve sleeve 60 and the housing 5 and the discharge bore 37 is possible.
  • the flow control valve piston 15 and the corresponding spring 49 which presses the valve piston 15 against the valve sleeve 60, are shown.
  • a screw-in pressure line could also be screwed into an internal thread 66 of the valve sleeve 60.
  • the pressure line could be used as a push-in pressure line, such as a pressure line 27 in FIG FIG. 1 shown used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Power Steering Mechanism (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Fluid-Driven Valves (AREA)
  • Eye Examination Apparatus (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Pump, in particular a servo steering pump for motor vehicles, having a flow control valve and a valve sleeve which has inflow openings to the flow control valve and a pressure connection to a hydraulic load.

Description

Die Erfindung betrifft eine Pumpe, insbesondere eine Lenkhilfpumpe für Kraftfahrzeuge, mit einem Stromregelventil und einer Ventilhülse, welche Zuflussöffnungen zum Stromregelventil und einen Druckanschluss zu einem hydraulischen Verbraucher aufweist.The invention relates to a pump, in particular a power steering pump for motor vehicles, having a flow control valve and a valve sleeve, which has inflow openings to the flow control valve and a pressure connection to a hydraulic consumer.

Derartige Pumpen sind bekannt. Die Druckschrift US 2005/0019175 A1 wird als nächstliegender Stand der Technik angesehen. Dabei weisen die Ventilhülsen einen geschraubten Druckanschluss auf, welche in ein Gewinde des Pumpengehäuses eingeschraubt wird. Eingeschraubte Ventilhülsen weisen aber eine Vielzahl von Nachteilen auf.Such pumps are known. The publication US 2005/0019175 A1 is considered to be the closest prior art. In this case, the valve sleeves on a screwed pressure port, which is screwed into a thread of the pump housing. But screwed valve sleeves have a number of disadvantages.

Es ist daher Aufgabe der Erfindung, eine Pumpe darzustellen, welche die Nachteile der bekannten Ventilhülsen vermeidet.It is therefore an object of the invention to present a pump which avoids the disadvantages of the known valve sleeves.

Die Aufgabe wird gelöst durch eine Pumpe, insbesondere Lenkhilfpumpe für Kraftfahrzeuge, mit einem Stromregelventil und einer Ventilhülse, welche Zuflussöffnungen zum Stromregelventil und/oder eine Durchgangsöffnung für eine Drosselstelle und einen Druckanschluss zu einem hydraulischen Verbraucher aufweist, wobei die Ventilhülse als in dem Pumpengehäuse eingesteckte Einsteckhülse ausgeführt ist und durch eine von der Ventilhülse getrennte Sicherungsvorrichtung axial im Pumpengehäuse positioniert ist.The object is achieved by a pump, in particular power steering pump for motor vehicles, having a flow control valve and a valve sleeve having inflow openings for flow control valve and / or a passage opening for a throttle point and a pressure connection to a hydraulic consumer, wherein the valve sleeve as inserted into the pump housing insertion sleeve is executed and is axially positioned in the pump housing by a separate from the valve sleeve securing device.

Die Ausführung der Ventilhülse als Einsteckhülse bietet den Vorteil, dass die Einsteckhülse präzise winkelorientiert in das Pumpengehäuse eingesetzt werden kann. Weiterhin wirken keine Einschraubkräfte des Gewindes deformierend auf die Ventilhülse und auf das Pumpengehäuse.The design of the valve sleeve as a plug-in sleeve has the advantage that the insert sleeve can be used precisely angle-oriented in the pump housing. Furthermore, no threading forces of the thread deforming effect on the valve sleeve and on the pump housing.

Ein bevorzugtes Ausführungsbeispiel der Pumpe ist dadurch gekennzeichnet, dass die Ventilhülse mindestens eine Querbohrung aufweist, welche zu einer Abströmbohrung im Pumpengehäuse positioniert wird. Die Ausführung der Einsteckhülse ermöglicht damit dieA preferred embodiment of the pump is characterized in that the valve sleeve has at least one transverse bore, which is positioned to a discharge bore in the pump housing. The execution of the insert sleeve thus allows the

Verwendung nur einer einzigen Querbohrung, da diese positioniert zum Gehäuse angebracht werden kann und deswegen nicht wie bei einer Einschraubhülse mehrere Querbohrungen notwendig sind, damit ein hinreichender Strömungsquerschnitt zur Abströmbohrung des Pumpengehäuses hergestellt werden kann.Use only a single transverse bore, since it can be positioned to be mounted to the housing and therefore not a plurality of transverse bores are necessary as in a screw-in, so that a sufficient flow cross-section can be made to Abströmbohrung the pump housing.

Bevorzugt wird weiterhin eine Pumpe, bei welcher in die Druckanschlussseite der Ventilhülse eine Druckleitung einsteckbar angeordnet ist. Es ist aber auch denkbar, dass die Druckleitung in die Ventilhülse eingeschraubt wird.Preference is also a pump in which in the pressure connection side of the valve sleeve, a pressure line is arranged inserted. But it is also conceivable that the pressure line is screwed into the valve sleeve.

Auch wird eine Pumpe bevorzugt, bei welcher die Sicherungsvorrichtung durch einen an der Druckleitung befestigten Flansch dargestellt ist. Das hat den Vorteil, dass auch die Druckleitung winkelorientiert montierbar ist, da der Flansch die Richtung der Druckleitung vorgibt und damit bestimmte Positionen im Motorraum eines Kraftfahrzeuges einhaltbar sind.Also, a pump is preferred in which the securing device is represented by a flange attached to the pressure line. This has the advantage that the pressure line can also be mounted in an angle-oriented manner, since the flange predetermines the direction of the pressure line and certain positions in the engine compartment of a motor vehicle can therefore be maintained.

Eine erfindungsgemäße Pumpe zeichnet sich dadurch aus, dass der Flansch an der Druckleitung angeschweißt oder angelötet oder eingepresst oder eingeschraubt ist.A pump according to the invention is characterized in that the flange is welded or soldered or pressed or screwed to the pressure line.

Eine weitere erfindungsgemäße Pumpe zeichnet sich dadurch aus, dass der Flansch eine ebene Montagefläche aufweist. Weiterhin wird eine Pumpe bevorzugt, bei welcher der Flansch eine angewinkelte Montagefläche aufweist. Das hat den Vorteil, dass der Platz für ein Befestigungsmittel des Flansches variabel am Gehäuse festgelegt werden kann.Another pump according to the invention is characterized in that the flange has a flat mounting surface. Furthermore, a pump is preferred in which the flange has an angled mounting surface. This has the advantage that the space for a fastening means of the flange can be variably fixed to the housing.

Auch wird eine Pumpe bevorzugt, bei welcher die Flanschmontagefläche durch mindestens eine Schraube am Pumpengehäuse befestigt ist. Nach Anziehen der Schraube ist damit sowohl die Hydraulikleitung als auch die Ventileinsteckhülse in axialer Richtung der Ventileinsteckhülse befestigt und gesichert.Also, a pump is preferred in which the flange mounting surface is secured by at least one screw on the pump housing. After tightening the screw so that both the hydraulic line and the Ventileinsteckhülse is attached and secured in the axial direction of the Ventileinsteckhülse.

Eine weitere erfindungsgemäße Pumpe zeichnet sich dadurch aus, dass die Sicherungsvorrichtung durch einen im Pumpengehäuse verstemmten Flansch dargestellt ist. Dadurch wird ein zusätzliches Befestigungsmittel, wie beispielsweise eine Schraube, vermieden und eine sehr Platz sparende axiale Sicherung der Ventilhülse erzielt.Another pump according to the invention is characterized in that the securing device is represented by a caulked flange in the pump housing. As a result, an additional fastening means, such as a screw, avoided and achieved a very space-saving axial securing the valve sleeve.

Ein weiterer Vorteil der Einsteckhülse ist, dass die Einsteckhülse zentriert zum Ventilkolben eingesetzt werden kann, insbesondere wenn die Einsteckhülse einen trichterförmigen Ventilsitz für den Ventilkolben aufweist, wo hingegen eine Einschraubpatrone durch den möglichen Versatz zwischen dem Gewinde und dem trichterförmigen Ventilsitz zu einer Aufweitung der Ventilbohrung im Gehäuse und zu einem Versatz zwischen dem Ventilkolben und dem Ventilsitz führen kann.A further advantage of the insertion sleeve is that the insertion sleeve can be centered relative to the valve piston, in particular if the insertion sleeve has a funnel-shaped valve seat for the valve piston, whereas a Einschraubpatrone by the possible offset between the thread and the funnel-shaped valve seat to a widening of the valve bore in Housing and can lead to an offset between the valve piston and the valve seat.

Die Erfindung wird nun anhand der Figuren beschrieben:

Figur 1
zeigt einen Querschnitt durch eine Lenkhilfpumpe mit einer erfindungsgemäßen Einsteckhülse und einer entsprechenden Flanschverbindung an der Drucklei- tung,
Figur 2
zeigt eine Aufsicht auf die Flanschverbindung,
Figur 3
zeigt eine abgewinkelte Flanschverbindung an einem Pumpengehäuse,
Figur 4
zeigt eine Ventilhülse mit einem verstemmten Flansch im Pumpengehäuse.
The invention will now be described with reference to the figures:
FIG. 1
shows a cross section through a power steering pump with an insertion sleeve according to the invention and a corresponding flange connection to the pressure line,
FIG. 2
shows a plan view of the flange connection,
FIG. 3
shows an angled flange on a pump housing,
FIG. 4
shows a valve sleeve with a caulked flange in the pump housing.

In Figur 1 ist im Querschnitt eine Lenkhilfpumpe 1 mit einer Pumpenrotationsgruppe und einer Ventilbaugruppe dargestellt. Von der Rotationsgruppe ist eine so genannte Steuerplatte 3 innerhalb des Pumpengehäuses 5 zu sehen, wobei die Steuerplatte 3 Saugnieren 7 und Drucknieren 9 für eine doppelhubige Flügelzellenpumpe enthält. Der Rotor und die Flügel der Flügelzellenpumpe sind hier nicht dargestellt. Im oberen Teil des Pumpengehäuses 5 ist eine Ventilbaugruppe 11 dargestellt, welche die Kombinationsfunktion eines Stromregelventils und eines vorgesteuerten Druckbegrenzungsventils wahrnehmen kann. In einer Ventilbohrung 13 des Pumpengehäuses 5 ist verschiebbar ein Ventilkolben 15 angeordnet. Der Ventilkolben 15 liegt mit einer Dichtkante 17 an einem etwa trichterförmigen Sitz einer Ventilhülse 19 an. Die Ventilhülse 19 wiederum ist in einem erweiterten Teil 21 der Ventilbohrung 13 einsteckbar gelagert. Die Ventilhülse 19 weist ferner eine Durchgangsöffnung 23 auf, in welcher ein teilweise konischer Zapfen 25 des Ventilkolbens 15 mit der Durchgangsöffnung 23 eine veränderliche Drosselstelle für den Verbraucherölstrom darstellt. Der Verbraucherölstrom wird durch die Druckleitung 27 dem Verbraucher, beispielsweise einer hydraulischen Servolenkung, zugeführt. Die Druckleitung 27 ist im Bereich 29 der Ventilhülse 19 eingesteckt und zusätzlich mit einer Dichtung 31 versehen. Die Druckleitung 27 weist ferner einen Flansch 33 auf, welcher hier, beispielsweise mittels einer Schweißnaht an der Druckleitung 27, befestigt ist und mit einer Schraube 35 im Gehäuse 5 befestigt ist. Aus dem Druckbereich der Flügelzellenpumpe führt eine Abströmbohrung 37 in den Ventilbereich, wo eine entsprechende Zuflussöffnung 39 der Ventilhülse 19 der Abströmbohrung 37 im Gehäuse gegenübergestellt wird. Dadurch, dass die Ventilhülse 19 als Einsteckhülse gegenüber der Abströmbohrung 37 im Gehäuse 5 positioniert werden kann, ergibt sich immer ein klar definierter Übergangsquerschnitt zwischen der Abströmbohrung 37 und der Ventilhülse 19, was im Stand der Technik durch die dort verwendeten Einschraubhülsen nicht möglich ist, da beim Einschrauben die entsprechenden Positionen der Zuflussöffnungen 39 je nach Gewinde und Anschraubkraft unterschiedlich ausfallen. Die Ventilbaugruppe im oberen Teil des Gehäuses 5 weist ferner einen Druckbegrenzungspiloten mit einer Pilotventilhülse 41 auf, in welcher ein Pilotventilkegel 43 in einem Ventilsitz 45 dichtend gelagert ist und durch eine Feder 47 in den Ventilsitz gepresst wird. Bei Überschreiten des einstellbaren Maximaldruckes durch die Vorspannkraft der Feder 47 öffnet der Ventilkegel 43, indem er sich vom Sitz 45 abhebt, und erzeugt dabei mit dem Ventilkolben 15 ein vorgesteuertes Druckbegrenzungsventil. Solange der Maximaldruck nicht überschritten wird, arbeitet der Ventilkolben 15, welcher durch eine Feder 49 in die Dichtkante 17 gedrückt wird, als Stromregelventilkolben und begrenzt den zum Verbraucher abfließenden Volumenstrom auf einen bestimmten Wert. Derartige Stromregelventil- und Druckbegrenzungsventilfunktionen sind aus dem Stand der Technik hinreichend bekannt und sollen deswegen hier nicht weiter erläutert werden.In FIG. 1 is shown in cross section a power steering pump 1 with a pump rotation group and a valve assembly. From the rotation group, a so-called control plate 3 can be seen within the pump housing 5, wherein the control plate 3 contains suction kidney 7 and pressure kidney 9 for a double-stroke vane pump. The rotor and the blades of the vane pump are not shown here. In the upper part of the pump housing 5, a valve assembly 11 is shown, which can perform the combination function of a flow control valve and a pilot operated pressure relief valve. In a valve bore 13 of the pump housing 5, a valve piston 15 is slidably disposed. The valve piston 15 bears with a sealing edge 17 against an approximately funnel-shaped seat of a valve sleeve 19. The valve sleeve 19 in turn is mounted insertable in an enlarged part 21 of the valve bore 13. The valve sleeve 19 also has a passage opening 23, in which a partially conical pin 25 of the valve piston 15 with the passage opening 23 is a variable throttle point for the consumer oil flow. The consumer oil flow is supplied through the pressure line 27 to the consumer, for example, a hydraulic power steering. The pressure line 27 is inserted in the region 29 of the valve sleeve 19 and additionally provided with a seal 31. The pressure line 27 also has a flange 33, which is here, for example by means of a weld on the pressure line 27, fixed and secured with a screw 35 in the housing 5. From the pressure range of the vane pump, a discharge bore 37 leads into the valve region, where a corresponding inflow opening 39 of the valve sleeve 19 of the discharge bore 37 is juxtaposed in the housing. The fact that the valve sleeve 19 can be positioned as a sleeve opposite the outlet bore 37 in the housing 5, always results in a clearly defined transitional cross-section between the discharge bore 37 and the valve sleeve 19, which is not possible in the prior art by the screw-in sleeves used there, since when screwing the corresponding positions of the inflow openings 39, depending on the thread and Anschraubkraft different. The valve assembly in the upper part of the housing 5 further comprises a pressure relief pilot with a pilot valve sleeve 41, in which a pilot valve cone 43 is sealingly mounted in a valve seat 45 and is pressed by a spring 47 into the valve seat. When the adjustable maximum pressure is exceeded by the biasing force of the spring 47, the valve plug 43 opens by lifting itself off from the seat 45, thereby producing a pilot-operated pressure limiting valve with the valve piston 15. As long as the maximum pressure is not exceeded is working, the valve piston 15, which is pressed by a spring 49 in the sealing edge 17, as a flow control valve piston and limits the flow flowing to the consumer to a certain value. Such Stromregelventil- and pressure relief valve functions are well known in the art and therefore should not be further explained here.

Für die Erfindung ist hier erwähnenswert, dass die Einsteckhülse 19 positioniert zur Abströmbohrung 37 positioniert werden kann und dadurch gegebenenfalls nur eine einzige Zuflussöffnung 39 benötigt, während im Stand der Technik mehrere Zuflussöffnungen als Abströmbohrungen verwendet werden müssen, um die notwendigen hydraulischen Öffnungsquerschnitte zu realisieren. Weiterhin wirken auf die Ventilhülse 19 und damit auch auf die Aufnahmebohrung 21 keine Einschraubkräfte, welche im Stand der Technik zu Verformungen und Dezentrierungen führen können. Einen zusätzlichen Vorteil bietet die Druckleitung 27 mit dem angeschweißten Flansch 33, welcher in der entsprechenden notwendigen Montageposition für den eventuellen Platz im Motorraum eines Kraftfahrzeuges positioniert angebracht werden kann und damit eine positionsgerechte Montage ohne Einschraubbewegungen der Druckleitung ermöglicht. Die axiale Fixierung am Pumpengehäuse sowohl für die Druckleitung 27 als auch für die Ventilhülse 19 erfolgt durch die separate Schraube 35 zwischen dem Flansch 33 und dem Pumpengehäuse 5.It is worthy of note here for the invention that the insertion sleeve 19 can be positioned to the discharge bore 37 and, if necessary, only a single inflow opening 39 is required, whereas in the prior art several inflow openings have to be used as outflow openings in order to realize the necessary hydraulic opening cross-sections. Furthermore, acting on the valve sleeve 19 and thus also on the receiving bore 21 no screwing, which can lead to deformations and decentrations in the prior art. An additional advantage provides the pressure line 27 with the welded flange 33, which can be positioned in the appropriate necessary mounting position for the eventual space in the engine compartment of a motor vehicle and thus allows a positionally correct mounting without screwing the pressure line. The axial fixation on the pump housing for both the pressure line 27 and the valve sleeve 19 is effected by the separate screw 35 between the flange 33 and the pump housing fifth

In Figur 2 ist in Aufsicht der Flansch 33 aus Figur 1 beispielhaft dargestellt. Die Druckleitung 27 ist geschnitten dargestellt und durch die Schweißnaht 37 am Flansch 33 befestigt. Befestigt wird der Flansch 33 in der dargestellten Position am hier nicht dargestellten Pumpengehäuse durch eine einzelne Schraube 35. Die Position des Flansches 33 zum Verlauf der Druckleitung 27, wie in Figur 1 dargestellt, ist damit für die Montage im Kraftfahrzeug festgelegt.In FIG. 2 is in supervision of the flange 33 from FIG. 1 exemplified. The pressure line 27 is shown cut and secured by the weld 37 on the flange 33. The flange 33 is fastened in the illustrated position on the pump housing not shown here by a single screw 35. The position of the flange 33 to the course of the pressure line 27, as in FIG. 1 shown, is thus set for mounting in the vehicle.

In Figur 3 ist alternativ ein Flansch 51 mit einer angewinkelten Montagefläche 53 dargestellt. Dadurch kann eine andere Fläche des Gehäuses 5 als die Anschlussfläche der Druckleitung 27 für die Montagebefestigung verwendet werden, falls auf der Eintrittsebene der Druckleitung 27 kein Platz für eine Schraube 55 und ein entsprechendes Gewinde im Gehäuse 5 vorhanden ist.In FIG. 3 Alternatively, a flange 51 is shown with an angled mounting surface 53. As a result, another surface of the housing 5 can be used as the mating surface of the pressure line 27 for mounting mounting, if no space for a screw 55 and a corresponding thread in the housing 5 is present on the entrance level of the pressure line 27.

In Figur 4 ist eine weitere Variante einer Ventileinsteckhülse 60 dargestellt. Die Ventileinsteckhülse 60 weist in diesem Fall einen Flansch 62 auf, weicher in Figur 4b mit 4 Verstemmungen 64 im Gehäuse 5 fixiert wird. Auch hier ist eine entsprechende Positionierung von Zuflussöffnungen der Ventilhülse 60 und des Gehäuses 5 bzw. der Abströmbohrung 37 möglich. In Figur 4a sind zusätzlich der Stromregelventilkolben 15 und die entsprechende Feder 49, welche den Ventilkolben 15 gegen die Ventilhülse 60 presst, dargestellt. Alternativ zu einer Einsteckdruckleitung könnte hier beispielsweise auch eine Einschraubdruckleitung in ein Innengewinde 66 der Ventilhülse 60 eingeschraubt werden. Genauso könnte die Druckleitung aber als Einsteckdruckleitung, wie als Druckleitung 27 in Figur 1 dargestellt, eingesetzt werden.In FIG. 4 another variant of a valve sleeve 60 is shown. The Ventileinsteckhülse 60 in this case has a flange 62, softer in FIG. 4b with 4 caulking 64 is fixed in the housing 5. Again, a corresponding positioning of inlet openings of the valve sleeve 60 and the housing 5 and the discharge bore 37 is possible. In FIG. 4a In addition, the flow control valve piston 15 and the corresponding spring 49, which presses the valve piston 15 against the valve sleeve 60, are shown. As an alternative to a push-in pressure line, for example, a screw-in pressure line could also be screwed into an internal thread 66 of the valve sleeve 60. In the same way, however, the pressure line could be used as a push-in pressure line, such as a pressure line 27 in FIG FIG. 1 shown used.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
LenkhilfpumpePower steering pump
33
Steuerplattecontrol plate
55
Pumpengehäusepump housing
77
Saugnieresuction kidney
99
Drucknierepressure kidney
1111
Ventilbaugruppevalve assembly
1313
Ventilbohrung des Pumpengehäuses 5Valve bore of the pump housing 5
1515
Ventilkolbenplunger
1717
Dichtkantesealing edge
1919
Ventilhülsevalve sleeve
2121
erweiterter Teil der Ventilbohrung 13extended part of the valve bore 13
2323
DurchgangsöffnungThrough opening
2525
konischer Zapfen des Ventilkolbens 15conical pin of the valve piston 15th
2727
Druckleitungpressure line
2929
Bereich der Ventil hülse 19 für Druckleitung 27Area of the valve sleeve 19 for pressure line 27th
3131
Dichtungpoetry
3333
Flanschflange
3535
Schraubescrew
3737
Abströmbohrungoutflow bore
3939
Zuflussöffnung der Ventilhülse 19Inflow opening of the valve sleeve 19
4141
PilotventilhülsePilot valve sleeve
4343
PilotventilkegelPilot poppet
4545
Ventilsitzvalve seat
4747
Federfeather
4949
Federfeather
5151
Flanschflange
5353
angewinkelte Montageflächeangled mounting surface
5555
Schraubescrew
6060
Ventileinsteckhülsevalve insertion
6262
Flanschflange
6464
Verstemmungcaulking
6666
Innengewinde der Ventilhülse 60Internal thread of the valve sleeve 60

Claims (9)

  1. Pump, particularly a power steering pump (1) for motor vehicles, having a flow control valve and a valve sleeve comprising inflow openings (39) to the flow control valve and / or a passage opening (23) for a throttling point and a pressure connection to a hydraulic consumer, characterised in that the valve sleeve is designed as an insert sleeve (19, 60) inserted in the pump housing and is positioned axially in the pump housing through a securing device separate from the valve sleeve.
  2. Pump according to claim 1, characterised in that the valve sleeve (19, 60) comprises at least one inflow opening (39) which is positioned relative to an outflow bore (37) in the pump housing (5).
  3. Pump according to claim 1 or claim 2, characterised in that a pressure line (27) is arranged so that it can be inserted or screwed into the pressure connection side of the valve sleeve (19).
  4. Pump according to claims 1 to 3, characterised in that the securing device is constituted by a flange (33, 51) fixed to the pressure line (27).
  5. Pump according to claims 1 to 4, characterised in that the flange (33, 51) is welded or soldered to, or pressed or screwed into, the pressure line (27).
  6. Pump according to claim 4 or claim 5, characterised in that the flange (33) comprises a planar assembly area.
  7. Pump according to claim 4 or claim 5, characterised in that the flange (51) comprises an angled assembly area.
  8. Pump according to claim 4 to claim 7, characterised in that the flange assembly area is fixed by at least one screw (35) to the pump housing (5).
  9. Pump according to claim 1 to claim 3, characterised in that the securing device is constituted by a flange (62) which is wedged in the pump housing (5).
EP07722522A 2006-06-24 2007-06-12 Pump Not-in-force EP2035710B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006029165 2006-06-24
PCT/DE2007/001020 WO2007147382A1 (en) 2006-06-24 2007-06-12 Pump

Publications (2)

Publication Number Publication Date
EP2035710A1 EP2035710A1 (en) 2009-03-18
EP2035710B1 true EP2035710B1 (en) 2011-03-16

Family

ID=38583066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07722522A Not-in-force EP2035710B1 (en) 2006-06-24 2007-06-12 Pump

Country Status (8)

Country Link
US (1) US8235682B2 (en)
EP (1) EP2035710B1 (en)
JP (1) JP5114479B2 (en)
CN (1) CN101479483B (en)
AT (1) ATE502215T1 (en)
DE (2) DE502007006732D1 (en)
ES (1) ES2360144T3 (en)
WO (1) WO2007147382A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4428667A1 (en) * 1993-08-12 1995-02-16 Trw Inc Cartridge arrangement

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3614266A (en) * 1969-12-24 1971-10-19 Ford Motor Co Compact positive displacement pump
US4276812A (en) * 1978-03-27 1981-07-07 Trw Inc. Power steering valve and method of making the same
US4483365A (en) * 1982-07-27 1984-11-20 Louis G. Basso, Jr. Interlocking modular valve mounting assembly
DE19751421A1 (en) * 1997-11-20 1999-05-27 Bosch Gmbh Robert Piston pump
DE19918126B4 (en) * 1999-04-22 2007-09-13 Robert Bosch Gmbh piston pump
JP2001082619A (en) * 1999-09-09 2001-03-30 Namiki Precision Jewel Co Ltd Holding structure of check valve
IT1308781B1 (en) * 1999-07-02 2002-01-10 Elasis Sistema Ricerca Fiat HIGH PRESSURE PUMP EQUIPPED WITH REMOVABLE INTERCEPTION VALVE FOR THE FUEL SUPPLY TO AN INTERNAL COMBUSTION ENGINE
JP4574786B2 (en) * 2000-03-15 2010-11-04 株式会社ショーワ Variable displacement pump
CN2477882Y (en) * 2001-04-29 2002-02-20 山东工程机械厂 Multifunctional prefill valve
JP2005042674A (en) * 2003-07-25 2005-02-17 Unisia Jkc Steering System Co Ltd Variable displacement pump
MX2008013720A (en) * 2006-04-26 2009-02-12 Tyco Valves & Controls Lp A valve assembly having a unitary valve sleeve.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4428667A1 (en) * 1993-08-12 1995-02-16 Trw Inc Cartridge arrangement

Also Published As

Publication number Publication date
JP2009541646A (en) 2009-11-26
ES2360144T3 (en) 2011-06-01
US8235682B2 (en) 2012-08-07
WO2007147382A1 (en) 2007-12-27
US20090301586A1 (en) 2009-12-10
DE502007006732D1 (en) 2011-04-28
EP2035710A1 (en) 2009-03-18
CN101479483A (en) 2009-07-08
ATE502215T1 (en) 2011-04-15
DE112007001449A5 (en) 2009-04-02
JP5114479B2 (en) 2013-01-09
CN101479483B (en) 2011-04-13

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