EP2035710A1 - Pump - Google Patents

Pump

Info

Publication number
EP2035710A1
EP2035710A1 EP07722522A EP07722522A EP2035710A1 EP 2035710 A1 EP2035710 A1 EP 2035710A1 EP 07722522 A EP07722522 A EP 07722522A EP 07722522 A EP07722522 A EP 07722522A EP 2035710 A1 EP2035710 A1 EP 2035710A1
Authority
EP
European Patent Office
Prior art keywords
pump
valve
flange
sleeve
pressure line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07722522A
Other languages
German (de)
French (fr)
Other versions
EP2035710B1 (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
Original Assignee
ixetic Bad Homburg GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ixetic Bad Homburg GmbH filed Critical ixetic Bad Homburg GmbH
Publication of EP2035710A1 publication Critical patent/EP2035710A1/en
Application granted granted Critical
Publication of EP2035710B1 publication Critical patent/EP2035710B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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, which inlet 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 is designed as a sleeve and by a securing device is positioned axially in the pump housing.
  • 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.
  • a 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 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.
  • Figure 1 shows a cross section through a power steering pump with an inventive
  • FIG. 2 shows a plan view of the flange connection
  • FIG. 3 shows an angled flange connection on a pump housing
  • FIG. 4 shows a valve sleeve with a caulked flange in the pump housing.
  • FIG. 1 shows a cross-section of a power steering pump 1 is shown 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 wings of the wing gel cell 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. 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. Due to the fact that the valve sleeve 19 can be positioned as an insertion sleeve relative to the outflow bore 37 in the housing 5, a clearly defined transitional cross section always results between the outflow bore 37 and the valve sleeve 39, which is not possible in the prior art by the screwed-in sleeves used therein 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.
  • a pilot valve cone 43 When the adjustable maximum pressure is exceeded by the pretensioning force of the spring 47, the valve cone 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 Druckbegrenzungsvent.il- functions are well known from the prior art and should therefore 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, while 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 the flange 33 from FIG. 1 is shown by way of example in plan view.
  • 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 shown in Figure 1, is thus set for mounting in the motor vehicle.
  • a flange 51 is shown with an angled mounting surface 53 alternatively.
  • 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 shows a further variant of a valve insertion sleeve 60.
  • the valve insertion sleeve 60 has a flange 62, which is fixed in the housing 5 in FIG. 4 b with 4 stiffeners 64.
  • 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 additionally shown.
  • 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. Equally, however, the pressure line could be used as a push-in pressure line, such as shown as a pressure line 27 in Figure 1.
  • valve sleeve 19 39 inflow opening of the valve sleeve 19 1 pilot valve sleeve 3 pilot valve cone

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

Pumpe pump
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. Dabei weisen die Ventilhülsen einen geschraubten Druckanschluss auf, welche in ein Gewinde des Pumpengehäuse eingeschraubt wird. Eingeschraubte Ventilhülsen weisen aber eine Vielzahl von Nachteilen auf.Such pumps are known. 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 Einsteckhülse ausgeführt ist und durch eine 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, which inlet 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 is designed as a sleeve and by a securing device is positioned axially in the pump housing.
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 die 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.A 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 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. 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.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. 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:The invention will now be described with reference to the figures:
Figur 1 zeigt einen Querschnitt durch eine Lenkhilfpumpe mit einer erfindungsgemäßenFigure 1 shows a cross section through a power steering pump with an inventive
Einsteckhülse und einer entsprechenden Flanschverbindung an der Druckleitung,Insertion sleeve and a corresponding flange on the pressure line,
Figur 2 zeigt eine Aufsicht auf die Flanschverbindung,FIG. 2 shows a plan view of the flange connection,
Figur 3 zeigt eine abgewinkelte Flanschverbindung an einem Pumpengehäuse,FIG. 3 shows an angled flange connection on a pump housing,
Figur 4 zeigt eine Ventilhülse mit einem verstemmten Flansch im Pumpengehäuse.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 Flü- gelzellenpumpe 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 39, 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 LJ- berschreiten 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 Druckbegrenzungsvent.il- funktionen sind aus dem Stand der Technik hinreichend bekannt und sollen deswegen hier nicht weiter erläutert werden.1 shows a cross-section of a power steering pump 1 is shown 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 wings of the wing gel cell 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. Due to the fact that the valve sleeve 19 can be positioned as an insertion sleeve relative to the outflow bore 37 in the housing 5, a clearly defined transitional cross section always results between the outflow bore 37 and the valve sleeve 39, which is not possible in the prior art by the screwed-in sleeves used therein 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 pretensioning force of the spring 47, the valve cone 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 Druckbegrenzungsvent.il- functions are well known from the prior art and should therefore 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, while 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 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. 2, the flange 33 from FIG. 1 is shown by way of example in plan view. 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 shown in Figure 1, is thus set for mounting in the motor vehicle. In Figure 3, a flange 51 is shown with an angled mounting surface 53 alternatively. 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, welcher in Figur 4b mit 4 Verstem- mungen 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. FIG. 4 shows a further variant of a valve insertion sleeve 60. In this case, the valve insertion sleeve 60 has a flange 62, which is fixed in the housing 5 in FIG. 4 b with 4 stiffeners 64. 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. 4 a, the flow control valve piston 15 and the corresponding spring 49, which presses the valve piston 15 against the valve sleeve 60, are additionally 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. Equally, however, the pressure line could be used as a push-in pressure line, such as shown as a pressure line 27 in Figure 1.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
I Lenkhilfpumpe 3 SteuerplatteI Power steering pump 3 Control plate
5 Pumpengehäuse5 pump housings
7 Saugniere7 suckling kidneys
9 Druckniere9 print kidneys
I 1 VentilbaugruppeI 1 valve assembly
13 Ventilbohrung des Pumpengehäuses 513 Valve bore of the pump housing 5
15 Ventilkolben15 valve piston
17 Dichtkante17 sealing edge
19 Ventilhülse19 valve sleeve
21 erweiterter Teil der Ventilbohrung 1321 extended part of the valve bore 13
23 Durchgangsöffnung23 passage opening
25 konischer Zapfen des Ventilkolbens 1525 conical pin of the valve piston 15th
27 Druckleitung27 pressure line
29 Bereich der Ventilhülse 19 für Druckleitung 2729 area of the valve sleeve 19 for pressure line 27th
31 Dichtung31 seal
33 Flansch33 flange
35 Schraube35 screw
37 Abströmbohrung37 outflow hole
39 Zuflussöffnung der Ventilhülse 19 1 Pilotventilhülse 3 Pilotventilkegel39 inflow opening of the valve sleeve 19 1 pilot valve sleeve 3 pilot valve cone
45 Ventilsitz45 valve seat
47 Feder47 spring
49 Feder Flansch angewinkelte Montagefläche Schraube Ventileinsteckhülse Flansch Verstemmung Innengewinde der Ventilhülse 60 49 spring Flange Angled Mounting Surface Screw Valve Plug Flange Collar Internal Thread of Valve Sleeve 60

Claims

Patentansprüche claims
1. Pumpe, insbesondere Lenkhilfpumpe (1 ) für Kraftfahrzeuge, mit einem Stromregelventil und einer Ventilhülse, welche Zuflussöffnungen (39) zum Stromregelventil und/oder eine Durchgangsöffnung (23) für eine Drosselstelle und einen Druckanschluss zu einem hydraulischen Verbraucher aufweist, dadurch gekennzeichnet, dass die Ventilhülse als Einsteckhülse (19, 60) ausgeführt ist und durch eine Sicherungsvorrichtung axial im Pumpengehäuse positioniert ist.1. Pump, in particular power steering pump (1) for motor vehicles, having a flow control valve and a valve sleeve, which inflow openings (39) for flow control valve and / or a passage opening (23) for a throttle point and a pressure connection to a hydraulic consumer, characterized in that the valve sleeve is designed as a plug-in sleeve (19, 60) and is positioned axially in the pump housing by a safety device.
2. Pumpe nach Anspruch 1 , dadurch gekennzeichnet, dass die Ventilhülse ( 19, 60) mindestens eine Zuflussöffnung (39) aufweist, welche zu einer Abströmbohrung (37) im Pumpengehäuse (5) positioniert ist.2. Pump according to claim 1, characterized in that the valve sleeve (19, 60) has at least one inflow opening (39) which is positioned to a discharge bore (37) in the pump housing (5).
3. Pumpe nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass in die Druckanschlussseite der Ventilhülse (19) eine Druckleitung (27) einsteckbar oder einschraubbar angeordnet ist.3. Pump according to claim 1 or claim 2, characterized in that in the pressure connection side of the valve sleeve (19) a pressure line (27) is arranged plugged or screwed.
4. Pumpe nach Anspruch 1 bis Anspruch 3, dadurch gekennzeichnet, dass die Sicherungsvorrichtung durch einen an der Druckleitung (27) befestigten Flansch (33, 51 ) dargestellt ist.4. Pump according to claim 1 to claim 3, characterized in that the securing device by a on the pressure line (27) fixed flange (33, 51) is shown.
5. Pumpe nach Anspruch 1 bis Anspruch 4, dadurch gekennzeichnet, dass der Flansch (33,51 ) an der Druckleitung (27) angeschweißt oder angelötet oder eingepresst oder eingeschraubt ist.5. Pump according to claim 1 to claim 4, characterized in that the flange (33,51) welded to the pressure line (27) or soldered or pressed or screwed.
6. Pumpe nach Anspruch 4 oder Anspruch 5, dadurch gekennzeichnet, dass der Flansch (33) eine ebene Montagefläche aufweist. 6. Pump according to claim 4 or claim 5, characterized in that the flange (33) has a planar mounting surface.
7. Pumpe nach Anspruch 4 oder Anspruch 5, dadurch gekennzeichnet, dass der Flansch (51 ) eine angewinkelte Montagefläche aufweist.7. Pump according to claim 4 or claim 5, characterized in that the flange (51) has an angled mounting surface.
8. Pumpe nach Anspruch 4 bis Anspruch 7, dadurch gekennzeichnet, dass die Flanschmontagefläche durch mindestens eine Schraube (35) am Pumpengehäuse (5) befestigt ist.8. Pump according to claim 4 to claim 7, characterized in that the Flanschmontagefläche by at least one screw (35) on the pump housing (5) is fixed.
9. Pumpe nach Anspruch 1 bis Anspruch 3, dadurch gekennzeichnet, dass die Sicherungsvorrichtung durch einen im Pumpengehäuse (5) verstemmten Flansch (62) dargestellt ist. 9. Pump according to claim 1 to claim 3, characterized in that the securing device by a in the pump housing (5) caulked flange (62) is shown.
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 true EP2035710A1 (en) 2009-03-18
EP2035710B1 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

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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)

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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
US5378118A (en) 1993-08-12 1995-01-03 Trw Inc. Cartridge assembly with orifice providing pressure differential
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
CN101449088B (en) * 2006-04-26 2012-12-26 泰科阀门控制有限合伙公司 A valve assembly having a unitary valve sleeve

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Title
See references of WO2007147382A1 *

Also Published As

Publication number Publication date
JP5114479B2 (en) 2013-01-09
ES2360144T3 (en) 2011-06-01
EP2035710B1 (en) 2011-03-16
WO2007147382A1 (en) 2007-12-27
ATE502215T1 (en) 2011-04-15
US20090301586A1 (en) 2009-12-10
CN101479483A (en) 2009-07-08
JP2009541646A (en) 2009-11-26
CN101479483B (en) 2011-04-13
DE112007001449A5 (en) 2009-04-02
DE502007006732D1 (en) 2011-04-28
US8235682B2 (en) 2012-08-07

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