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
  • 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
  • F04C2/348—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 vanes positively engaging, with circumferential play, an outer rotatable member
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
  • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
  • F01C21/10—Outer members for co-operation with rotary pistons; Casings
  • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
  • F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
• • 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
  • F04C14/04—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for reversible machines or pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
  • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
  • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
  • F04C15/0023—Axial sealings for working fluid
  • F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps

Definitions

• Displacement pump method for operating a positive displacement pump and steering systems
• the invention relates to a positive displacement pump, in particular a
• Vane pump for delivering a fluid for a consumer of a steering system.
• the invention further relates to a method for operating the displacement pump, in particular the vane pump for conveying the fluid for the consumer of the steering system.
• the invention also relates to a
• Vane pumps of known design are generally constructed such that a rotor rotates in a cam ring.
• the cam ring is completed by one side with a housing forming a face plate and a control plate.
• the cam ring has a to the axis of the rotor depending on the design coaxial or non-coaxial contour and forms a pump room.
• In the peripheral surface of the rotor are arranged substantially radially extending slots over the width thereof, in which radially displaceable wings are guided. Upon rotation of the rotor about its axis, the wings on the
• a suction region and a pump pressure space or pressure region are formed, wherein the suction region in the region of increasing volume and the pressure range of the
• Pump pressure chamber is arranged in the range of decreasing volume of the chambers.
• the invention is therefore based on the object, a positive displacement pump, in particular a vane pump for delivering a fluid for a
• Specify consumers of a steering system which is reversible in its direction of rotation and in which it is not necessary to provide a control valve for controlling a delivery volume of the vane pump.
• the object is with a positive displacement pump, in particular a
• Vane pump for delivering a fluid for a consumer of a steering system with the features of claim 1. Furthermore, the object is achieved with a method for operating a displacement pump, in particular a vane pump for conveying a fluid for a consumer of a steering system having the features of patent claim 11. Moreover, the object is achieved with a steering system with the features of claim 13.
• the present invention provides a positive displacement pump, in particular a vane pump for delivering a fluid to a consumer of a steering system, wherein a rotor, a cam ring, a housing-side control plate and a cover-side control plate in the assembled state
• Control plate are arranged in the axial direction adjacent to a lid end face, wherein the rotor core between the housing end face and the lid end face is movable in the axial direction.
• the present invention further provides a method for operating a positive displacement pump, in particular a vane pump for delivering a fluid to a consumer of a steering system.
• the method comprises providing a rotor package consisting of at least one rotor, a cam ring, a housing-side control plate, and a lid-side Control plate, which form a rotor assembly in the assembled state, and wherein the housing-side control plate in the axial direction adjacent to a housing end face and the cover-side control plate are arranged in the axial direction adjacent to a Deckelstirn preparation, wherein the rotor core between the housing end face and the Deckelstirn specification is movable in the axial direction ,
• the present invention also provides a steering system with at least one consumer, and a positive displacement pump for delivering a fluid for the at least one consumer of the steering system.
• An idea of the present invention is to provide a vane pump which promotes both directions of rotation. Powered by an electric motor that drives in both directions of rotation according to a steering movement, the vane pump pumps hydraulic fluid into corresponding steering cylinder chambers of a steering system. The connections for each direction of rotation are alternately applied with suction or pressure fluid. Due to the mobility of the vane pump
• Rotor package in the axial direction between the housing end face and the lid end face may be on separate shuttle valves for a
• Vane pump can be dispensed by the rotor package to the
• a direction of rotation of the rotor is reversible, wherein the fluid is conveyed in a first direction of rotation of the rotor or in a second direction of rotation of the rotor, wherein a respective pressure side of the positive displacement in operation, the rotor core to a to the pressure side of the Positive displacement pump opposite housing end face or lid end face applies.
• a channeling of a rear wing pressure supply formed in the rotor can be sealingly closed on an abutment side of the rotor core on the housing end face or the cover end face. Due to the fact that the respective pressure side is open with its rear wing side, and the resulting connection is closed to the suction openings, can be dispensed with separate shuttle valves for the rear wing supply and the suction and pressure control.
• Lid end face is spaced, wherein a formed between the rotor core and each of the housing end face and the lid end face gap is at least 0.2 mm, preferably at least 0.1 mm.
• the rotor core is thus slightly lifted in the rest position of both end faces, so depending on the direction of rotation and thus each pressure side, the pressure fluid in this space can get to the appropriate Schuerielkanälen and can promote the vane pump easily with immediate Schuerielunterst Reifenung.
• a first end side of the rotor core and a second end side of the rotor core each have an annular groove into which an O-ring or a spring element formed of an elastic material is inserted, wherein a thickness of the O-ring and the spring element for spacing the
• Runners package of the housing end face and the lid end face are formed greater than a depth of the groove, and wherein a spring constant of the O-ring and the spring element is at least 200 N / mm, preferably at least 300 N / mm. The rest position of the rotor package is thus ensured on the one hand by the O-ring seal and / or the spring element.
• Suction side of the positive displacement pump are separated by a arranged on a cam ring outside sealing ring.
• the rotor has a ring-shaped groove on a first end face or on a second end face into which a spring element, preferably a star spring, is inserted, which engages under the wing ends of the wings and engages the wings on the wings
• Rear wing pressure supply can be supported from the stand at low speeds of the vane pump.
• the rotor has at a first end face or at a second end face an annular groove into which a in the housing-side control plate or in the
• Radial direction of the rotor in the respective slots for applying the outer ends of the wings to the inner wall of the cam ring are extendable.
• the wings are thus forcibly extended when starting, so that the
• Wingtips lie in the boundary layer region of the curve. This is the
• the tubular body protrudes at least 3 mm, preferably at least 2 mm, in the formed on the first end face or on the second end face of the rotor groove, wherein the tubular body is formed as a sheet, and on a is fixed in the housing-side control plate or in the cover-side control plate formed annular groove.
• the tubular body can thus contact the wings in the start-up phase of the vane pump for extending the wings.
• a rear wing pressure on the wings by a concerneddifferenz between an adjacent to the rotor end face of the tubular body and a depth of the formed in the first end face or in the second end face of the rotor annular groove is controllable, since changing and each gap partitioned vanes are created on the vane backside.
• Embodiments of the invention mediate. They illustrate
• FIG. 1 is a longitudinal sectional view of a positive displacement pump for delivering a fluid to a consumer of a steering system according to a preferred embodiment of the invention
• Fig. 2 is an enlarged detail view of that shown in Fig. 1
• Figure 3 is a schematic representation of the positive displacement pump for delivering the fluid to the consumer of the steering system according to the preferred embodiment of the invention.
• 4 is a cross-sectional view of the positive displacement pump for delivering the fluid to the consumer of the steering system according to the preferred embodiment of the invention;
• Fig. 6 shows a steering system with the positive displacement pump for delivering the fluid to the consumer of the steering system according to the preferred embodiment of the invention.
• Fig. 1 shows a longitudinal sectional view of a positive displacement pump for conveying a fluid for a consumer of a steering system according to a
• the positive displacement pump 10 is preferably driven by an electric motor 14.
• the electric motor 14 is connected in an advantageous manner by means of a shaft 16 with a rotor 24.
• the positive displacement pump 10 preferably has a pump housing 18 in which a cam ring 20 and the therein
• rotatably mounted rotor 24 are arranged. Furthermore, a housing-side control plate 32 and a cover-side control plate 34 are preferably arranged in the pump housing 18.
• the pump housing 18 preferably has a first housing part 18a and a second housing part 18b.
• the first housing part 18a is preferably arranged adjacent to the electric motor 14 and the shaft 16 and at least partially encloses the cam ring 20, the housing side
• the second housing part 18b is preferably formed by a lid which closes the first housing part 18a.
• the working chamber 30 is in the axial direction through an end face
• the rotor 24, the cam ring 20, the housing-side control plate 32 and the cover-side control plate 34 form a rotor core 35 in the assembled state.
• the rotor core 35 is preferably screwed by two screws 46a, 46b. An external thread of the screws 46a, 46b engages in an internal thread of the rotor core 35. Alternatively, the rotor core 35 may also be threaded onto a plurality of pins.
• the housing-side control plate 32 is arranged in the axial direction adjacent to the housing end face 36 and the cover-side control plate 34 in the axial direction adjacent to the cover end face 38.
• the rotor core 35 is preferably movable between the housing end face 36 and the cover end face 38 in the axial direction.
• a first end face 35a of the rotor core 35 and a second end face 35b of the rotor core 35 each have an annular groove 35c, 35d.
• an O-ring 41 formed of an elastic material is preferably inserted in the annular groove 35c, 35d.
• a spring element be inserted into one of the two annular grooves 35c, 35d, a spring element.
• a thickness of the O-ring 41 and the spring element is preferably greater than a depth of the groove formed.
• the O-ring 41 or the spring element are thus dimensioned larger than the groove.
• the O-ring 41 and the spring element thereby space the rotor core 35 from the housing end surface 36 and the lid end surface 38.
• a spring constant of the O-ring and the spring element is preferably at least 200 N / mm, more preferably at least 300 N / mm.
• the rotor 24 is at a first
• annular groove 24c End face 24a on an annular groove 24c.
• the annular groove 24c for example, be formed on a second end face 24b of the rotor.
• a tubular body 42 is preferably used, which protrudes from the groove 24c in the assembled state of the rotor package 35 and at a start of the rotor 24 (not shown in FIG. 1) wings of the rotor 24 by contact in the radial direction of the
• a direction of rotation DR of the rotor 24 is preferably reversible.
• the fluid is thus preferably conveyed in a first direction of rotation DR1 of the rotor 24 or in a second direction of rotation DR2 of the rotor 24.
• Positive displacement pump 10 during operation, thus applies the rotor core 35 to a housing end surface or cover end surface 38 opposite the pressure side of the positive displacement pump 10, as a function of the direction of rotation DR of the rotor 24.
• the positive displacement pump 10 preferably has a constant
• the positive displacement pump 10 may have, for example, a variable geometric delivery volume.
• FIG. 2 shows an enlarged detail view of that shown in FIG. 1
• the tubular body 42 preferably projects 2 mm into the one at the first
• the tubular body 42 may project, for example, 3 mm or more into the groove 24c formed on the first end surface 24a of the rotor 24.
• the groove 24c may be formed on the second end face 24b of the rotor 24, for example.
• the tubular body 42 is preferably formed as a sheet.
• the tubular body 42 is advantageously fixed to an annular groove 37 formed in the housing-side control plate 32.
• the tubular body 42 may, for example, in a in the cover-side control plate
• a trailing wing pressure on the vanes (not shown in FIG. 2) of the rotor 24 is preferably a dimensional difference between an end face 42a of the tubular body 42 adjacent to the rotor 24 and a depth of the annular groove 24c formed in the first end face 24a of the rotor controllable.
• the tubular body can be arranged, for example, in an annular groove formed in the second end face 24b of the rotor.
• Fig. 3 shows a schematic representation of the positive displacement pump for conveying the fluid for the consumer of the steering system according to the preferred embodiment of the invention.
• the channeling of the rear wing pressure supply formed in the rotor 24 is preferably on the contact side of the rotor core 35 at the
• the rotor core 35 is at rest from the housing end face 36 and the cover end face 38 spaced. A between the rotor core 35 and each of the
• Housing end face 36 and the lid end face 38 formed gap 39 is at least 0.1 mm.
• the gap 39 may be, for example, at least 0.2 mm.
• Pressure side DS and suction side SS of the positive displacement pump 10 is separated from each other in an advantageous manner by a arranged on a cam ring outer side 20b of the cam ring seal ring 44.
• a piston sliding ring may be provided instead of the sealing ring.
• Fig. 4 shows a cross-sectional view of the positive displacement pump for delivering the fluid to the consumer of the steering system according to the preferred
• the rotor 24 advantageously has the annular groove 24c on the first end face 24a.
• a spring element 43 is preferably used in the form of a star spring.
• the spring element 43 engages under the inner wing ends 27b of the wings 27 and thus engages the wings 27 against the inner wall 20a of the cam ring 20.
• the tubular body 42 can be inserted into the annular groove 37 formed in the cover-side control plate 34.
• the tubular body 42 preferably projects out of the annular groove 37 and into the annular groove 24c formed on the first end surface 24a of the rotor 24. The (not shown in Fig.
• tubular body has an equidistant sliding curve to the cam ring 20, wherein at a start of the rotor 24, the wings 27 by contact with the tubular body in the radial direction of the rotor 24 in the respective slots 26 for applying the outer Wings ends 27a to the inner wall 20a of the cam ring 20 are extendable.
• FIG. 5 shows a flowchart of a method for operating the
• the method comprises providing Sl a pump housing, a cam ring arranged therein and a rotatably mounted therein rotor, wherein in the rotor slots are formed in which wings are guided radially displaceable.
• the method further comprises applying S2 the wings by a rear wing channel formed in the rotor, which the
• the method further comprises applying S3 outer ends of the wings to an inner wall of the cam ring.
• the method further includes
• housing-side control plate and is limited by an end face of a cover-side control plate.
• the method further comprises providing S5 a rotor package consisting of at least the rotor, the cam ring, the housing-side control plate and the cover-side control plate, which form the rotor core in the assembled state, and wherein the housing-side control plate in the axial direction adjacent to a housing end face and the lid side Control plate are arranged in the axial direction adjacent to a lid end face, wherein the rotor core between the housing end face and the lid end face in the axial direction is movable S6.
• a direction of rotation of the rotor is reversible, wherein the fluid is conveyed in a first direction of rotation of the rotor or in a second direction of rotation of the rotor, wherein a respective pressure side of the positive displacement pump in operation the rotor core to a to the pressure side of the positive displacement pump opposite housing end face or lid end face applies.
• Fig. 6 shows a steering system with the positive displacement pump for delivering the fluid to the consumer of the steering system according to the preferred embodiment of the invention.
• the steering system 1 is located in a motor-driven vehicle, in particular in a passenger car or a commercial vehicle.
• the steering system 1 comprises a steering wheel 2 to be actuated by the driver, which acts via a steering column 3 on a vehicle wheel via a steering gear 4 and adjusts this in accordance with the driver's request.
• a steering angle torque sensor 5 is symbolically entered via the appropriate the steering angle, possibly also the steering angle speed to be determined and are supplied as input to a control and control unit, in which the input signals are processed and the from this - together with other vehicle status and operating variables - generates control signals via which the various units of the vehicle including the steering system 1 and the electric motor 9a are to be set.
• the steering system 1 has at least one consumer or actuating cylinder 6.
• the adjusting cylinder 6 has two separate chambers 6a and 6b, which are each connected via hydraulic lines 8a, 8b with the positive displacement pump 10.
• the displacement pump 10 is preferably designed as a vane pump.
• the positive displacement pump 10 preferably generates a hydraulic pressure for the Consumer.
• an electric motor 9a is provided, which is connected to the positive displacement pump 10 by means of a coupling 9b.
• the tubular body 42 may be formed by a molded groove shape in the housing-side control plate 32 or in the lid-side
• Control plate 34 formed annular groove to be fixed.
• the rotor is preferably UU- or HH-shaped, depending on whether a guide is mounted on one side or on both sides.
• a leaking fluid discharge preferably takes place via a
• the vane pump can alternatively be used, for example, as a recuperation pump, for example for the generator drive of the electric motor 9a in the case of a push-back steering axle for energy recovery.

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

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (5)

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Citations (1)

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• 2015
  • 2015-05-13 DE DE102015107543.1A patent/DE102015107543A1/de active Pending
• 2016
  • 2016-03-31 US US15/573,368 patent/US20180142686A1/en not_active Abandoned
  • 2016-03-31 WO PCT/EP2016/056996 patent/WO2016180571A1/de active Application Filing
  • 2016-03-31 JP JP2017559111A patent/JP6516872B2/ja active Active
  • 2016-03-31 CN CN201680041289.9A patent/CN107849920B/zh active Active

Patent Citations (1)

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