EP2499371A2 - Pompe volumétrique - Google Patents

Pompe volumétrique

Info

Publication number
EP2499371A2
EP2499371A2 EP10771702A EP10771702A EP2499371A2 EP 2499371 A2 EP2499371 A2 EP 2499371A2 EP 10771702 A EP10771702 A EP 10771702A EP 10771702 A EP10771702 A EP 10771702A EP 2499371 A2 EP2499371 A2 EP 2499371A2
Authority
EP
European Patent Office
Prior art keywords
rotor
cam ring
displacement pump
positive displacement
housing
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.)
Withdrawn
Application number
EP10771702A
Other languages
German (de)
English (en)
Inventor
Fuad Koldzic
Thomas Wekenmann
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.)
Robert Bosch Automotive Steering GmbH
Original Assignee
ZF Lenksysteme 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 ZF Lenksysteme GmbH filed Critical ZF Lenksysteme GmbH
Publication of EP2499371A2 publication Critical patent/EP2499371A2/fr
Withdrawn legal-status Critical Current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
    • F04C2/3441—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F04C2/3442—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • 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
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • F04C14/226—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam by pivoting the cam around an eccentric axis
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the invention relates to a positive displacement pump according to the closer defined in the preamble of claim 1.
  • a generic positive displacement pump is known from DE 10 2006 012 357 A1, which is intended for a power steering device of a motor vehicle.
  • a set of rotors is arranged in its interior. Rotor elements are enclosed by a cam ring. The volume of the working chambers between each
  • Rotor elements can be adjusted by changing the eccentricity between a rotor and the cam ring, to which the cam ring is adjusted accordingly.
  • a control piston For pressurizing the chambers, a control piston is provided, which is connected via a respective associated bore with a chamber.
  • a disadvantage of this embodiment is that while there is an external high-pressure interface between the lid and the housing, which carries the risk of leaks in itself, or must be sealed accordingly good. For this reason, correspondingly high production costs result for this embodiment. In addition, the space is larger in this way.
  • the present invention has the object to improve a positive displacement pump of the type mentioned in such a way that no external
  • control of the cam ring and the pressure medium delivery into the working chambers now does not take place via a through hole in the peripheral flange of the housing and an introduction through the lid, but the control bores are further placed in the interior of the pump, in an area within the peripheral flange. This allows them to be designed as short axial bores and fed either directly or indirectly through a face plate the cam ring or the working chambers in a very short path.
  • Diameters in the housing and the elimination of two further oblique holes in the lid the manufacturing costs can be reduced.
  • also omitted grooves for an O-ring seal in the lid are omitted.
  • Face plate can be omitted.
  • valve piston By displacing the valve piston further towards the center of the housing, it is also possible to carry out the control bores as simple vertical or axially parallel bores.
  • Figure 1 A cross section through a positive displacement pump according to the prior art.
  • Figure 2 A side view of the positive displacement pump according to the figure 1 according to the prior art.
  • Figure 3 A longitudinal section through the positive displacement pump according to the prior art.
  • Figure 4 A section along the line IV-IV of Figure 3 according to the prior art.
  • Figure 5 A cross section through the positive displacement pump according to the invention (section as in Figure 1).
  • Figure 6 A side view of the positive displacement pump according to the invention (section as in Figure 2).
  • Figure 7 A longitudinal section through the positive displacement pump according to the invention (section as in Figure 3).
  • FIG. 8 shows a section along the line VIII-VIII of FIG. 7.
  • Figure 9 A longitudinal section through the positive displacement pump according to the invention with a lid.
  • Figure 10 seen a view of the end plate of the positive displacement pump from the direction of the pressure chambers.
  • Figure 1 1 A view of the face plate seen from the suction side.
  • Displacement pumps with variable displacement, in particular vane pumps are known from the general state of the art, which is why below only on the essential features of the invention features will be discussed in more detail.
  • To the state of Technique is again referred to the aforementioned DE 10 2006 012 357 A1 and also to DE 199 42 466 A1 reference.
  • the positive displacement pump shown in the figures is a vane pump
  • Figures 1 to 4 show a positive displacement pump according to the prior art.
  • Figures 5 to 1 1 relate to an inventive
  • the positive displacement pump has a housing 1 with a rotor set 2, a rotor 3, rotor elements 4 and a cam ring 5. Furthermore, in the housing 1, a provided for receiving the rotor set 2 with the rotor elements 4 outer ring 6 is used.
  • the outer ring 6 ensures the free movement of the cam ring 5 and transmits lateral forces from the cam ring 5 in the housing 1. In principle, however, the housing 1 itself can take over the function of the outer ring 6.
  • the rotor 3 is enclosed by the cam ring 5. Between the rotor 3 and the cam ring 5 4 delimited working chambers 7 are formed by rotor elements whose volume in a known manner by changing the eccentricity between the rotor 3 and cam ring 5 is adjustable. In the embodiment, the rotor elements 4 are formed as wings.
  • the illustrated vane pump further comprises an end plate or side plate 8 (only shown in Figures 7 and 9), which laterally bounds the rotor set 2 and which in a known and not shown manner, a pump suction and a pump pressure port.
  • the end plate 8 is inserted in the embodiment between an end face of the rotor set 2 and the housing 1. The facing away from the end plate 8 end face of the rotor set 2 is by a
  • the housing 1 has an end-side cover plate 1a, from the outer periphery of which an axially extending peripheral flange 17 extends.
  • the peripheral flange 17 is on the side facing away from the cover plate 1 a side by the housing cover.
  • the illustrated positive displacement pump further includes a first and a second pressure chamber 10, 11 formed on two sides of an outer peripheral surface of the cam ring 5 between the cam ring 5 and the outer ring 6 and which are pressurized to displace the cam ring 5 in a conventional manner.
  • a control piston 14 is via control bores 15 and 16, each with one of
  • Pressure chambers 10, 11 connected.
  • the pressure chambers 10, 1 1 can by the
  • Control piston 14 can be mutually connected both with the operating pressure of the pump and with a container port. Due to the resulting pressure difference in the pressure chambers 10, 11 a displacement of the cam ring 5 is achieved.
  • the positive displacement pump also has a suction port 12 and a
  • the two control bores 15 and 16 extend from the control piston 14 axially through the peripheral flange 17 of the housing 1 and open into the housing cover 9.
  • the housing cover 9 In the housing cover 9 are inclined bores 15a and 16a and there
  • control bores are 15 and 16
  • Peripheral flange 17 to the housing cover 9.
  • the two control bores 15 and 16 are rather disposed radially within the peripheral flange 17 of the housing 1.
  • Holes 18 and 19 in the end plate 8 are aligned with the control bores 15 and 16 and open axially into the crescent-shaped pressure chambers 10, 1 1st
  • Control bores 15 and 16 significantly shorter than the known control bores 15th and 16 according to the prior art. This is particularly clear in comparison of Figures 2 and 3 with Figures 6 and 7 of the embodiment of the invention. This measure results in a significant space reduction, because in this way, the control piston 14 and the pressure and suction ports 12 and 13 can be moved further inwards. This is also apparent in the comparison of the figures. Due to the simpler and shorter course of the control bores 15 and 16 also results in a manufacturing simplification and cost reduction.
  • End plate 8 in grooves 20 and 21, extending in the circumferential direction of the end plate.
  • a molded sealing ring 22 encloses the suction connection 12 and the rotor 3, as can be seen from FIG.
  • Extended regions of the molded seal 22 in the form of "eyes" 23 and 24 surround the control bores 15 and 16. With this configuration, the pressure region can be sealed off from the suction region of the positive displacement pump with only one molded seal 22.

Landscapes

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

Abstract

L'invention concerne une pompe volumétrique à cylindrée variable, notamment une pompe à palettes, dont le carter comporte un couvercle et une bride périphérique annulaire s'étendant dans le sens de l'axe longitudinal de la pompe, dans la cavité intérieure de la bride étant montée un anneau externe constituant le palier d'un ensemble rotor composé essentiellement d'un rotor, d'éléments de rotor et d'un anneau à cames. Le rotor est entouré par l'anneau à cames. Entre le rotor et l'anneau à cames sont formées des chambres de travail délimitées par les éléments de rotor, le volume de ces chambres variant par modification de l'excentricité entre le rotor et l'anneau à cames. Entre une face périphérique externe de l'anneau à cames et l'anneau externe sont formées des chambres de pression qui sont soumises à une pression pour déplacer l'anneau à cames, un piston de commande étant relié aux chambres de pression par l'intermédiaire d'alésages de commande associés pour la mise sous pression. Selon l'invention, les alésages de commande s'étendent au moins sensiblement axialement dans le couvercle, dans le sens radial à l'intérieur de la bride périphérique du carter, et débouchent dans les chambres de pression en traversant une plaque frontale montée à l'intérieur dans l'axe devant l'ensemble rotor.
EP10771702A 2009-11-09 2010-10-19 Pompe volumétrique Withdrawn EP2499371A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009046516A DE102009046516A1 (de) 2009-11-09 2009-11-09 Verdrängerpumpe
PCT/EP2010/065678 WO2011054660A2 (fr) 2009-11-09 2010-10-19 Pompe volumétrique

Publications (1)

Publication Number Publication Date
EP2499371A2 true EP2499371A2 (fr) 2012-09-19

Family

ID=43852721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10771702A Withdrawn EP2499371A2 (fr) 2009-11-09 2010-10-19 Pompe volumétrique

Country Status (5)

Country Link
US (1) US20120257962A1 (fr)
EP (1) EP2499371A2 (fr)
CN (1) CN102667160A (fr)
DE (1) DE102009046516A1 (fr)
WO (1) WO2011054660A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014203193B4 (de) * 2014-02-21 2019-10-31 Joma-Polytec Gmbh Verstellbare Flügelzellenpumpe
DE102014105613A1 (de) * 2014-04-22 2015-10-22 Robert Bosch Automotive Steering Gmbh Flügelzellenpumpe mit verstellbarem Fördervolumen

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3322549A1 (de) * 1983-06-23 1984-03-15 Daimler-Benz Ag, 7000 Stuttgart Fluegelzellenpumpe mit veraenderlichem foerderhub fuer hydraulische betriebsmittel insbesondere von kraftfahrzeugen
JP3866410B2 (ja) 1998-04-23 2007-01-10 ユニシア ジェーケーシー ステアリングシステム株式会社 可変容量形ポンプ
JP2000087877A (ja) 1998-09-10 2000-03-28 Bosch Braking Systems Co Ltd 可変容量形ポンプ
DE19957886A1 (de) * 1998-12-07 2000-07-20 Bosch Braking Systems Co Verstellpumpe
JP4929471B2 (ja) * 2005-07-29 2012-05-09 カヤバ工業株式会社 可変容量ベーンポンプ
JP2007239626A (ja) * 2006-03-09 2007-09-20 Hitachi Ltd 可変容量型ベーンポンプおよび可変容量型ポンプの制御方法
DE102006012357A1 (de) 2006-03-17 2007-09-20 Zf Lenksysteme Gmbh Verdrängerpumpe mit variablem Fördervolumen
JP4769126B2 (ja) * 2006-05-30 2011-09-07 株式会社ショーワ 可変容量型ポンプ
EP2049800B1 (fr) * 2006-08-21 2011-12-28 Joma-Polytec GmbH Pompe de circulation
DE102006060433B4 (de) * 2006-12-21 2014-10-23 Zf Lenksysteme Gmbh Flügelzellenpumpe
JP4989392B2 (ja) * 2007-09-21 2012-08-01 日立オートモティブシステムズ株式会社 可変容量形ポンプ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011054660A2 *

Also Published As

Publication number Publication date
WO2011054660A3 (fr) 2011-11-10
US20120257962A1 (en) 2012-10-11
DE102009046516A1 (de) 2011-05-12
CN102667160A (zh) 2012-09-12
WO2011054660A2 (fr) 2011-05-12

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