WO2010136015A2 - Pompe, en particulier pompe à palettes - Google Patents

Pompe, en particulier pompe à palettes Download PDF

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Publication number
WO2010136015A2
WO2010136015A2 PCT/DE2010/000562 DE2010000562W WO2010136015A2 WO 2010136015 A2 WO2010136015 A2 WO 2010136015A2 DE 2010000562 W DE2010000562 W DE 2010000562W WO 2010136015 A2 WO2010136015 A2 WO 2010136015A2
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
pump
valve
flow control
pressure relief
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.)
Ceased
Application number
PCT/DE2010/000562
Other languages
German (de)
English (en)
Other versions
WO2010136015A3 (fr
Inventor
Bernd Brunsch
Karl Prinzhorn
Markus Meitinger
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
Priority to EP10727644.6A priority Critical patent/EP2435704B1/fr
Priority to DE112010002098T priority patent/DE112010002098A5/de
Publication of WO2010136015A2 publication Critical patent/WO2010136015A2/fr
Anticipated expiration legal-status Critical
Publication of WO2010136015A3 publication Critical patent/WO2010136015A3/fr
Ceased legal-status Critical Current

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
    • 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
    • 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
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • F04C14/265—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels being obtained by displacing a lateral sealing face
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump

Definitions

  • the invention relates to a pump, in particular a vane pump, with at least one displacement body, which is arranged between two pressure plates, which are acted upon on their side facing away from the displacer with a delivery pressure of the pump to minimize leakage gaps between the displacer and the pressure plates.
  • European Patent EP 0 906 512 B1 discloses a vane pump with a rotor which receives wings and with two pressure plates tightly seated on the rotor, at least one of the two pressure plates being provided with inlet and outlet openings, which provide fluid communication between a pressure area and an underwing area produce.
  • One of the pressure plates has an opening which provides fluid communication between a pressure area and a pressure space bounded by this pressure plate.
  • the object of the invention is to provide a pump, in particular a vane pump, with at least one displacement body which is arranged between two pressure plates which are acted upon on their back side facing away from the displacement with a delivery pressure of the pump to minimize leakage gaps between the displacement body and the pressure plates to provide that has a high efficiency and / or a long life.
  • the object is with a pump, in particular a vane pump, with at least one displacement body, which is arranged between two pressure plates, which are acted upon on their the displacer rear sides substantially with a delivery pressure of the pump to minimize leakage gaps between the displacer and the pressure plates , in that the rear side of one of the pressure plates can be connected to a pressure relief space via a valve device combined with a flow control valve in order to lower the pressure acting on the back side of this pressure plate in a targeted manner.
  • the pump is preferably a vane pump with at least one wing as a displacement body.
  • the invention also relates to positive displacement pumps of a different type, such as roller-cell pumps.
  • the pump is present preferably designed as a hydraulic pump and serves to pressurize a working medium, in particular a hydraulic medium, such as oil, and to promote at least one consumer.
  • a working medium in particular a hydraulic medium, such as oil
  • the loading of the back sides of the two pressure plates with the delivery pressure of the pump can lead to undesirable wear on the displacement plate coming into contact with the pressure plates at high rotational speeds. This wear, especially an undesirable eating, is particularly high at high speeds and a high discharge pressure of the pump.
  • the pressure on the back of preferably only one of the pressure plates is selectively reduced by means of the valve device to the wear, in particular the risk of contact between the displacement body, in particular a rotor and / or a wing, and the pressure plates to minimize.
  • the function of the pressure plates at a low speed and / or at a low delivery pressure of the pump is not affected by the invention, since the delivery pressure of the pump by means of the valve means can be switched to the backs of a pressure plate to the leakage gaps between the displacer and to minimize the pressure plates at low speed.
  • the flow control valve is preferably an already existing flow control valve which serves to keep the speed-dependent volumetric flow provided by the pump independent of the pressure applied to the consumer and the temperature of the pressure medium for the consumer as constant as possible.
  • a preferred embodiment of the pump is characterized in that the connection between the back of one of the pressure plates and the pressure relief space depending on the flow rate, the delivery pressure and / or the speed of the pump is fully or partially released by the valve means to the on the To lower the pressure acting on the rear side of this pressure plate in a targeted manner.
  • the pressure relief space can be, for example, a tank for the working medium, which is exposed to ambient pressure. Due to the targeted pressure reduction on the back of one of the printing plates, a sufficient distance between the displacer and the printing plates can be ensured, in particular at a high delivery pressure and optionally simultaneously high flow rate of the pump.
  • a further preferred embodiment of the pump is characterized in that the valve device comprises a pressure relief passage, which the Rear side of one of the pressure plates in dependence on the position of a closing body with the pressure relief space connects.
  • the closing body By the closing body, the connection of the back of one of the pressure plates with the pressure relief space can be fully or partially released or interrupted.
  • a further preferred embodiment of the pump is characterized in that the closing body belongs to a valve piston of the valve device.
  • the closing body is preferably connected in one piece with the valve piston of the valve device.
  • a further preferred embodiment of the pump is characterized in that the valve device combined with the flow control valve interrupts a connection between a pressure port and the pressure relief passage when the pump delivers large volume flows.
  • the flow control valve serves to keep the speed-dependent volume flow provided by the pump independent of the pressure applied to the consumer and the temperature of the pressure medium for the consumer as constant as possible.
  • the flow control valve is provided with a pressure compensator.
  • the valve piston of the combined with the flow control valve device has the function of a pressure compensator. With this pressure compensator, the rise of a pressure difference at a throttle of the flow control valve is detected, which is a measure of the volume flow to the consumer. The occurring adjustment of the functioning as a pressure balance valve piston is used for targeted lowering of the pressure on the back of one of the printing plates.
  • a further preferred embodiment of the pump is characterized in that the closing body releases a connection between a Saug réellean- circuit of the flow control valve and the pressure relief passage when the pump delivers large volume flows. As a result, the delivery pressure acting on the rear side of one of the pressure plates is switched off in a working region of the pump regulated by the flow control valve.
  • Flow control valve and the pressure relief channel releases when the pump promotes small volume flows.
  • the delivery pressure of the pump acts in a non-regulated by the flow control valve workspace of the pump on the back of a pressure plate.
  • a further preferred embodiment of the pump is characterized in that the closing body comprises a guide sleeve with an outer annular groove.
  • the guide sleeve serves to move the valve piston with the closing body to and fro.
  • the annular groove allows communication between the suction pressure port of the flow control valve and the pressure relief passage to selectively lower the pressure acting on the back of one of the pressure plates.
  • a further preferred embodiment of the pump is characterized in that the closing body comprises an annular body from which the guide sleeve extends and on which a control edge is formed, which represents the control edge of the pressure compensator.
  • the ring body preferably has on the side facing away from the guide sleeve a stepped pin with a through hole, which serves to provide an annular gap together with an opening in a terminal screw of the valve device, the throttle device, in particular a measuring throttle, for generating the control differential pressure represents the flow control valve.
  • the control edge on the ring body which opens or interrupts, controls the connection to the suction pressure connection of the flow control valve, thus regulating the unnecessary volume flow, which is not required by the consumer, back into the suction area of the pump.
  • valve means comprises a pressure relief valve which releases the connection between the back of one of the pressure plates and the pressure relief space when the pressure at the pressure port exceeds a predetermined value.
  • an existing pressure limiting valve can be used to selectively lower, that is to say, switch off the delivery pressure acting on the back side of one of the pressure plates.
  • Figure 1 is a simplified representation of a pump according to the invention with two pressure plates, which are both acted upon by the delivery pressure of the pump;
  • FIG. 2 shows the pump of Figure 1, wherein the pressure on the back of one of the two pressure plates is deliberately lowered;
  • Figure 3 is a Cartesian coordinate diagram with a schematic characteristic of a flow control valve of the pump and
  • Figure 4 is a similar view as in Figure 1 according to another embodiment with a pressure relief valve.
  • FIGS. 1, 2 and 4 each show a pump 1 with a housing part 2 shown in a simplified manner.
  • the pump 1 is a vane pump, as disclosed, for example, in FIG. 1 and the associated description of the European patent EP 0 906 512 B1.
  • the housing part 2 of the vane pump 1 comprises a contoured ring 4, which is also referred to as a lifting ring.
  • a rotor 5 is rotatably driven, as indicated by an arrow 6.
  • the rotor 5 is used in a known manner to at least one (not shown) wing within the contour ring 4 to move slidably.
  • the rotor 5 and / or the wing represent or represents one or more displacement body, which is or are so movable within the contour ring 4 and between two pressure plates 11, 12 that two substantially crescent-shaped delivery spaces within a stroke contour of the contour ring 4 of preferably be passed through several wings.
  • the normally flat pressure plates 11, 12 are partially exaggerated strongly curved or shown bent to make the function of the pressure plates 11, 12 visible under pressure.
  • a delivery pressure of the pump 1 On a the rotor 5 facing away Rear side 13 of the pressure plate 12 acts, as indicated by arrows 14, 15, a delivery pressure of the pump 1. The application of the delivery pressure 14, 15 causes the pressure plate 12 deformed towards the rotor 5.
  • the pressure plate 11 rests with its rear side 18 facing away from the rotor 5 against an annular supporting and / or sealing device 20, radially inside of which a pressurizing space 24 is formed.
  • Figure 1 is indicated by an arrow 25 that the pressurization space 24 and the back 18 of the pressure plate 11 as well as the back 13 of the pressure plate 12 is acted upon by the delivery pressure of the pump 1.
  • a connection between the pressurization chamber 24 on the rear side 18 of the pressure plate 11 and a pressure relief channel 26 is indicated, which is connected in the illustrated embodiment to a flow control valve 30, which serves to constant the volume flow delivered by the pump 1 to keep.
  • the flow control valve 30 comprises a pressure connection 31, which can be designed as a pressure connection of the pump 1. In or at the pressure port 31, there is substantially the delivery pressure of the pump 1.
  • the flow control valve 30 further includes a suction port 32 communicating with the suction side of the pump 1.
  • the pressure port 31 and the suction port 32 are provided in a valve housing 34 which may be integrated into the housing 2 of the pump 1.
  • a valve space 35 is recessed, which has the shape of a blind hole, in which a terminal screw 36 is screwed, which includes the pressure port 31.
  • valve piston 38 In the valve chamber 35, a valve piston 38 is guided reciprocally movable.
  • the valve piston 38 is biased by a biasing spring 81 within the valve chamber 35 against the terminal screw 36 and comprises an annular body 40, on which a control edge 41 is formed.
  • a guide sleeve 42 which includes an interior space with a pressure region 43 which is open to the valve chamber 35 out.
  • a stepped pin 45 which comprises a central through hole 46 which connects the pressure port 31 with the inner space or pressure region 43 of the guide sleeve 42.
  • the pin 45 extends from a pressure control chamber 48 through an opening 80 of the terminal screw 36 to the pressure port 31 and forms with the opening 80, the measuring throttle of the flow control valve in the form of an annular gap.
  • the pressure control chamber 48 is, as well as the pressure port 31, the inner space 43 of the guide sleeve 42 and the valve chamber 45 is applied to the pressure difference at the measuring throttle substantially with the delivery pressure of the pump 1.
  • an arrow 49 is indicated that the back 13 of the pressure plate 12 is acted upon via the pressure control chamber 48 of the flow control valve 30 with the delivery pressure of the pump 1.
  • Figure 2 is indicated by an arrow 50, that the pressurizing chamber 24 via the pressure relief passage 26 and an annular groove 52 with the suction port 32 of the flow control valve 30 is connected to relieve the back 18 of the pressure plate 11.
  • the pressure plate 11 in Figure 2 is flat and not curved, as shown in Figure 1, shown.
  • the annular groove 52 is formed on the outside of the guide sleeve 42.
  • FIG. 3 shows in a Cartesian coordinate diagram with an x-axis 54 and a y-axis 55 a schematic characteristic curve 56 of the flow control valve 30 or of the pump 1.
  • the volume flow is shown, which is funded by the pump 1 through the flow control valve 30.
  • the speed during operation of the pump 1 is shown.
  • the characteristic curve 56 comprises an unregulated region 58, in which the flow control valve 30 has not yet opened the outflow to the suction region 32 and the characteristic 56 increases linearly, and a regulated region 59, in which the flow control valve increasingly opens, and therefore the characteristic curve 56 substantially parallel to the x-axis 54 runs.
  • the loading of the pressure plates 11, 12 on their rear sides 13, 18 with the delivery pressure of the pump 1 serves to the pressure acting on the other side of the pressure plates 11, 12 in the displacing delivery cells between the rotor 5, wing and contour ring 4 and is therefore also referred to as pressure plate compensation.
  • the pressure plate compensation is changed according to an essential aspect of the invention in dependence on the rotational speed of the pump 1.
  • FIGS. 2 and 3 it can be seen that the compensation, that is to say deflection, of the pressure plate 12 remains, and only the compensation of the pressure plate 11 is reduced.
  • the pressurization chamber 24 is on the back 18 of the pressure plate 11 in Figures 1 and 2 with the valve chamber 35 of the flow control valve 30 in conjunction.
  • valve piston 38 moves with the guide sleeve 42, as seen in Figure 2, away from the terminal screw 36, that the guide sleeve 42, the mouth of the pressure relief passage 26 initially covered in the valve chamber 35 and then to the suction port releases. Via the annular groove 52 on the outside of the guide sleeve 42, the pressure in the pressure relief passage 26 can be reduced to the suction port 32 of the flow control valve 30 out.
  • the pressure relief channel designated by 26 in FIGS. 1 and 2 does not exist.
  • An arrow 65 indicates that the pressurization chamber 24 on the rear side 18 of the pressure plate 11 is acted upon by the valve chamber 35 of the flow control valve 30 essentially with the delivery pressure of the pump 1.
  • a pressure relief passage 66 extends outside the valve chamber 35 through the valve housing 34.
  • An arrow 67 indicates that the pressure in the pressurization space 24 is degradable via the pressure relief passage 66, which, as indicated by a further arrow 68, communicates with a pressure relief space, such as a tank.
  • the pressure relief passage 66 is closed by a valve piston 70 which is biased by a spring 71 against a through hole 74 which connects the pressure relief passage 66 with the valve chamber 35 of the flow control valve 30.
  • the valve piston 70 and the spring 71 represent a pressure relief valve 75, via which the pressure in the valve chamber 35 of the flow control valve 30 can be reduced when a predetermined pressure limit is exceeded.
  • the pressure relief valve 75 opens, then the pressure application chamber 24 is simultaneously relieved via the pressure relief passage 66, as indicated by the arrows 67 and 68.

Landscapes

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

Abstract

L'invention concerne une pompe, en particulier une pompe à palettes, qui comprend au moins un élément de refoulement placé entre deux plaques de pression dont les faces arrière opposées à l'élément de refoulement sont pratiquement sollicitées avec une pression de refoulement de la pompe afin de réduire au minimum les interstices de fuite entre l'élément de refoulement et les plaques de pression. L'invention est caractérisée en ce que la face arrière de l'une des plaques de pression peut être reliée à une chambre de décompression par le biais d'un dispositif à soupape combiné à une soupape de régulation de débit afin d'abaisser de manière ciblée la pression agissant sur la face arrière de cette plaque de pression.
PCT/DE2010/000562 2009-05-27 2010-05-18 Pompe, en particulier pompe à palettes Ceased WO2010136015A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10727644.6A EP2435704B1 (fr) 2009-05-27 2010-05-18 Pompe, en particulier pompe à palettes
DE112010002098T DE112010002098A5 (de) 2009-05-27 2010-05-18 Pumpe, insbesondere flügelzellenpumpe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009022885.3 2009-05-27
DE102009022885 2009-05-27

Publications (2)

Publication Number Publication Date
WO2010136015A2 true WO2010136015A2 (fr) 2010-12-02
WO2010136015A3 WO2010136015A3 (fr) 2011-12-29

Family

ID=43223141

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2010/000562 Ceased WO2010136015A2 (fr) 2009-05-27 2010-05-18 Pompe, en particulier pompe à palettes

Country Status (3)

Country Link
EP (1) EP2435704B1 (fr)
DE (1) DE112010002098A5 (fr)
WO (1) WO2010136015A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101724912B1 (ko) * 2015-09-30 2017-04-07 현대자동차주식회사 기계식 가변 릴리프 오일펌프 구조

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4692507A1 (fr) * 2024-08-09 2026-02-11 Eaton Intelligent Power Limited Pompe à palettes avec plaques de pression hydrostatiques

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0906512B1 (fr) 1996-06-21 2002-10-23 LuK Fahrzeug-Hydraulik GmbH & Co. KG Pompe a ailettes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3761206A (en) * 1971-02-02 1973-09-25 Shively Bros Inc Fluid device
US4199304A (en) * 1978-03-13 1980-04-22 Ford Motor Company Positive displacement compact slipper pump
DE19846815B4 (de) * 1997-10-16 2014-08-07 Ixetic Bad Homburg Gmbh Ventilanordnung und Pumpe für ein Getriebe
JP5022139B2 (ja) * 2007-08-17 2012-09-12 日立オートモティブシステムズ株式会社 可変容量型ベーンポンプ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0906512B1 (fr) 1996-06-21 2002-10-23 LuK Fahrzeug-Hydraulik GmbH & Co. KG Pompe a ailettes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101724912B1 (ko) * 2015-09-30 2017-04-07 현대자동차주식회사 기계식 가변 릴리프 오일펌프 구조

Also Published As

Publication number Publication date
DE112010002098A5 (de) 2012-09-06
WO2010136015A3 (fr) 2011-12-29
EP2435704B1 (fr) 2014-10-29
EP2435704A2 (fr) 2012-04-04

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