EP1292771B1 - Pompe - Google Patents

Pompe Download PDF

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Publication number
EP1292771B1
EP1292771B1 EP01943472A EP01943472A EP1292771B1 EP 1292771 B1 EP1292771 B1 EP 1292771B1 EP 01943472 A EP01943472 A EP 01943472A EP 01943472 A EP01943472 A EP 01943472A EP 1292771 B1 EP1292771 B1 EP 1292771B1
Authority
EP
European Patent Office
Prior art keywords
pump
pressure plate
pressure
chamber
recess
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.)
Expired - Lifetime
Application number
EP01943472A
Other languages
German (de)
English (en)
Other versions
EP1292771A1 (fr
Inventor
Rainer Betzin
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.)
LuK Fahrzeug Hydraulik GmbH and Co KG
Original Assignee
LuK Fahrzeug Hydraulik GmbH and Co KG
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 LuK Fahrzeug Hydraulik GmbH and Co KG filed Critical LuK Fahrzeug Hydraulik GmbH and Co KG
Publication of EP1292771A1 publication Critical patent/EP1292771A1/fr
Application granted granted Critical
Publication of EP1292771B1 publication Critical patent/EP1292771B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00Rotary-piston machines or pumps
    • F04C2/30Rotary-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
    • F04C2/34Rotary-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
    • F04C2/344Rotary-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
    • F04C2/3446Rotary-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 more than one line or surface
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10Outer members for co-operation with rotary pistons; Casings
    • F01C21/104Stators; Members defining the outer boundaries of the working chamber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023Axial sealings for working fluid

Definitions

  • the invention relates to a pump having a housing having a recess in which a pump unit is arranged, which has one of a pump chamber ring and at least one pressure chamber lying on the pump chamber ring pressure plate pump chamber and a rotatably driven pump element which is arranged in the pump chamber, and with a limited by the recess and the pressure plate pressure chamber.
  • EP 0 758 716 A2 An example of a pump, in particular a vane pump, according to the prior art is EP 0 758 716 A2. It shows a pump with improved cold start characteristics, wherein a pressure plate with a high material thickness is used in a known manner to reduce the deflection of the pressure plate becomes.
  • a gear pump is known with a device for reducing the mechanical abrasion within the pump.
  • the pump has a bearing plate for receiving the axes of the gears, which is provided with recesses.
  • the recesses give the bearing plate an additional degree of freedom to allow the mechanical abrasion reducing movements.
  • a pump comprising a housing in which a recess is formed.
  • a pump unit is arranged, which has a pump chamber formed by a pump chamber ring and at least one located on the pump chamber ring pressure plate and a rotatably driven pump element. This is arranged in the pump chamber.
  • the pump has a limited by the recess and one of the pressure plates pressure chamber.
  • the pump is characterized in that between the bearing surfaces of the pump chamber ring and the pressure chamber side pressure plate is a circumferential spacer.
  • a force acts on the one hand on the pressure-chamber side ellipse or circular surface of the pressure plate, which is directly opposite the passage opening of the pump chamber ring; on the other hand, a force acts on the pressure-chamber-side annular surface of the pressure plate by the medium pressure, so that a counter force is established which counteracts the deflection of the pressure plate in the region of the circular surface.
  • the deflection of the pressure plate at least decreases, so that the once set leakage gap in operation, so under pressure, temperature, etc., the pump remains essentially unchanged, whereby this leakage gap can be selected according to narrow or narrow, so that the volumetric efficiency of the pump is improved. Since the deflection of the pressure plate is largely compensated, this pressure plate does not have to be particularly strong, whereby the axial length of the pump can be reduced.
  • a peripheral seal is arranged between the side wall of the recess in the housing and the pressure chamber side pressure plate, which thus between side wall of the recess and the edge surface of the printing plate is located. In this way, however, it is also ensured that the cavity behind the pressure plate between the pump chamber ring and pressure plate annular surface is not subjected to the medium pressure.
  • a particularly preferred embodiment is characterized in that the spacer means is formed integrally with the pump chamber ring and / or the pressure chamber side pressure plate.
  • the spacer can be easily made in one piece with the pump chamber ring or the pressure plate.
  • the pump according to the invention is characterized by a cost-effective production, yet the volumetric efficiency is improved.
  • the pressure chamber is located between the pressure-chamber-side pressure plate and the bottom of the recess.
  • the pump described below may be designed as a vane, paddle and roller cell pump in which the rotatably driven pump element is formed by a rotor, in; are used depending on Pumpenart- wings or rollers or the -bei the embodiment of a Sperrflügelpumpe- is realized as a contour element. It would also be conceivable, however, to design the pump as a gear pump. Such pumps or their function are known per se, so that in the following the exact configuration of the rotary-driven pump element is not described in detail.
  • FIG. 1 shows in a greatly simplified and only partially illustrated form a pump 1 in cross section, which comprises a housing 2.
  • a recess 3 is introduced, which -here not shown-is closed by a housing cover which is attachable to the housing 2 of the pump 1.
  • a pump unit 4 which has a pump chamber 5, which is bounded by a pump chamber ring 6 and two resting on the annular bearing surfaces 7 and 8 pressure plates 9 and 10.
  • the housing 2 may also be formed so that it limits the pump chamber 5.
  • the pressure plate 10 is provided.
  • One of the pressure plates 10 is at a distance from the bottom 11 of the substantially circular cylindrical recess 3. This pressure plate 10 thus forms with the recess 3, a pressure chamber 12, in which the funded by a rotationally driven pump element 13 medium is introduced.
  • the pressure chamber 12 has a connection, not shown here, to a pump-side consumer connection (not shown).
  • the rotatably driven pump element 13 is the above-mentioned rotor of a vane, paddle or roller cell pump or a gear of a gear pump. In order to drive the pump element 13 rotatably, this is arranged rotationally fixed on one end 14 of a rotatably mounted in the housing 2 drive shaft 15. At the other end, not shown here, a drive torque can be introduced.
  • the drive shaft 15 passes through the pressure chamber 12 and passes through a, preferably centrally formed in the pressure plate 10 opening 16. Within the opening 16, a circumferential sealing element 17 is arranged. The seal is achieved via a sealing gap. Between the lateral surface of the drive shaft 15 and the drive shaft breakthrough 18 formed in the housing 2, a sealing element is preferably also arranged to-like the sealing element 17- seal the pressure chamber 12 to the outside.
  • This sealing element can be designed as a radial shaft sealing ring 16 '.
  • a circumferential spacer means 19 is arranged, which is formed in the present embodiment of Figure 1 in one piece with the pump chamber ring 6.
  • a preferably open-edged, radially outer circumferential groove 20 is introduced, so that at least partially a cavity 21 is formed between the pressure plate 10 and the pump chamber ring 6.
  • the spacer 19 is arranged on the pump chamber ring 6 so that it divides the pressure chamber surface 22 facing the pump chamber ring 6 into two subregions, namely the pressure plate circular or ellipse surface 24 facing the opening 23 of the pump chamber ring 6 and the radially outer pressure plate annular surface 24 '.
  • the pressure plate circular or Ellipse area 24 is therefore in the circular or elliptical area 24 '', whereas the pressure plate ring surface 24 'in the annular region 24''' of the pressure plate 10 is located.
  • the spacer means 19 is spaced from the side wall 25 of the recess 3. A Druckplattenellipsenthesis results when the opening 23 is present substantially elliptical.
  • the pump element 13 then preferably has an axis of rotation in which the center of the ellipse lies.
  • the opening 23 may also be circular in cross-section, in which case the pump element has an axis of rotation which is offset from the center of the opening 23.
  • a circumferential seal 27 is arranged, which preferably comes to rest in an annular groove 28, which is introduced in the embodiment shown in the peripheral surface 26. It would also be conceivable, however, to arrange the seal 27 in an annular groove to be formed in the housing 2, which would thus be formed in the side wall 25 of the recess 3.
  • FIG. 2 shows a second exemplary embodiment of a pump 1.
  • the same or identically acting parts are provided with the same reference numerals in FIG. 2 in detail in FIG. 2 as in FIG. 1. Therefore, only differences between the pumps 1 according to FIG. 1 and FIG 2 received.
  • the spacer 19 is integrally formed in the pump 1 of Figure 2 with the pressure chamber side pressure plate 10 and thus forms a survey on the pressure plate surface 22 from.
  • a preferably open-edged, radially outer annular groove 29 in the annular region 24 '' 'is introduced so that the spacer means 19 -in plan view - is formed as a flat circular disk.
  • the spacer 19 may also be present as a separate insert, which then comes to rest between the pressure plate 10 and the pump chamber ring 6.
  • FIG. 4 shows a third exemplary embodiment of a pump 1.
  • the pump chamber ring In contrast to the exemplary embodiments according to FIGS. 1 and 2, 6 is not supported on the side wall 25 of the recess 3. Instead, it is held centered on the pressure plate 9.
  • connecting elements 31 or centering pins can be provided, which can be designed as connecting bolts.
  • These connecting elements 31 can be provided both between pump chamber ring 6 and pressure plate 9 and in the form that a deflection of the pressure plate 10 is not hindered by this - also between the pump chamber ring 6 and the pressure chamber side pressure plate 10.
  • Such connecting elements 31 can also be used in the pump 1 of Figure 1 and Figure 2.
  • the radial extent, in particular the outer diameter A of the pump chamber ring 6, is therefore smaller in the exemplary embodiment of the pump 1 according to FIG. 4 than the radial extent, that is, for example, the outer diameter B of the pressure chamber-side pressure plate 10.
  • the pump 1 is further simplified and shown only schematically.
  • the same or equivalent parts as in Figures 1, 2 and 4 are provided with the same reference numerals.
  • the medium conveyed via the pump element 13 is present in the pressure chamber 12 at a pressure p.
  • act on the bottom 11 facing the pressure plate outer surface 32 forces K, which urge the pressure plate 10 in its circular area 24 "facing the aperture 23 of the pump chamber ring 6 in the direction of the rotationally driven pump element 13.
  • the belly formation by deflection of the pressure plate in the circular area occurs in known pumps in that there are areas with different media pressures within the pump chamber, since within the pump chamber 5 at least one pressure and a suction area are formed, in which thus prevail different medium pressures, so on
  • the forces acting on the pressure plate surface in the circular region can not be compensated solely by the forces resulting from the medium pressures.
  • the spacer means 19 according to the invention is provided in the pump 1, however, the pressure forces K '' acting on the pressure plate surface 22 are supported from the pump chamber 5 by the forces K 'acting on the pressure plate ring surface 24', so that a deflection of the pressure plate 10 which is not desired for the respective application is avoided.
  • the leakage gap existing between the pressure plate circular surface 24 and the pump element 13 is substantially unchanged even during operation of the pump 1; it can therefore be designed very narrow, which improves the volumetric efficiency of the pump 1.

Landscapes

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

Claims (5)

  1. Pompe avec un boîtier (2) qui comporte un creux (3) dans lequel est disposée une unité de pompe (4) qui possède une chambre de pompe (5), constituée par une bague (6) de chambre de pompe et au moins une plaque de pression (9, 10) placée sur la bague de chambre de pompe, et un élément de pompe (13) pouvant être entraîné en rotation, lequel est situé dans la chambre de pompe (5), et avec un espace de pression (12) limité par le creux et la plaque de pression, caractérisée en ce que se trouve, entre la surface d'appui (7) de la bague (6) de chambre de pompe et la surface d'appui (18') de la plaque de pression (10) côté espace de pression, un moyen d'espacement (19) périphérique dont l'étendue radiale est plus petite que chacune des étendues radiales de la plaque de pression (10) côté espace de pression et de l'espace de pression (12).
  2. Pompe avec un boîtier (2) qui comporte un creux (3) dans lequel est disposée une unité de pompe (4) qui possède une chambre de pompe (5), constituée par une bague (6) de chambre de pompe et au moins une plaque de pression (9, 10) placée sur la bague de chambre de pompe, et au moins un élément de pompe (13) pouvant être entraîné en rotation, lequel est situé dans la chambre de pompe, et avec un espace de pression (12) limité par le creux et la plaque de pression, caractérisée en ce que l'étendue radiale de la bague (6) de chambre de pompe est plus petite que chacune des étendues radiales de la plaque de pression (10) côté espace de pression et de l'espace de pression (12).
  3. Pompe selon la revendication 1 ou 2, caractérisée en ce qu'un joint périphérique (27) se trouve entre la paroi latérale du creux dans le boîtier (2) et la plaque de pression (10) côté espace de pression.
  4. Pompe selon la revendication 1 ou 3, caractérisée en ce que le moyen d'espacement (19) est réalisé d'une seule pièce avec la bague (6) de chambre de pompe et/ou la plaque de pression (10) côté espace de pression.
  5. Pompe selon la revendication 1 ou 2, caractérisée en ce que l'espace de pression (12) se trouve entre le fond du creux (3) et la plaque de pression (10) côté espace de pression.
EP01943472A 2000-06-05 2001-06-01 Pompe Expired - Lifetime EP1292771B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10027811A DE10027811A1 (de) 2000-06-05 2000-06-05 Pumpe
DE10027811 2000-06-05
PCT/EP2001/006290 WO2001094788A1 (fr) 2000-06-05 2001-06-01 Pompe

Publications (2)

Publication Number Publication Date
EP1292771A1 EP1292771A1 (fr) 2003-03-19
EP1292771B1 true EP1292771B1 (fr) 2006-02-22

Family

ID=7644757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01943472A Expired - Lifetime EP1292771B1 (fr) 2000-06-05 2001-06-01 Pompe

Country Status (5)

Country Link
US (1) US20040037729A1 (fr)
EP (1) EP1292771B1 (fr)
DE (3) DE10027811A1 (fr)
ES (1) ES2258532T3 (fr)
WO (1) WO2001094788A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009135587A2 (fr) * 2008-05-08 2009-11-12 Ixetic Bad Homburg Gmbh Pompe

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2477797A (en) * 1945-08-06 1949-08-02 Nellie M Gottschalt Gear pump with wear compensating means
DE1553282C3 (de) * 1963-07-05 1975-05-22 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Rotationskolbenmaschine, Insbesondere Rotationskolbenpumpe
US3549288A (en) * 1969-03-05 1970-12-22 Ford Motor Co Positive displacement slipper pump with flangeless drive shaft
DE2526447C3 (de) * 1975-06-13 1981-04-16 Daimler-Benz Ag, 7000 Stuttgart Flügelzellenpumpe
US4207038A (en) * 1978-05-01 1980-06-10 Ford Motor Company Power steering pump
US4386891A (en) * 1981-04-23 1983-06-07 General Motors Corporation Rotary hydraulic vane pump with undervane passages for priming
DE3638848A1 (de) * 1986-11-13 1988-05-19 Bosch Gmbh Robert Aggregat zum foerdern von kraftstoff aus einem vorratstank zur brennkraftmaschine, insbesondere eines kraftfahrzeuges
US5411376A (en) * 1993-12-15 1995-05-02 Walbro Corporation Fuel pump with noise suppression
EP0758716B1 (fr) * 1995-08-14 2003-12-10 LuK Fahrzeug-Hydraulik GmbH & Co. KG Pompe à palettes
EP0906512B1 (fr) * 1996-06-21 2002-10-23 LuK Fahrzeug-Hydraulik GmbH & Co. KG Pompe a ailettes
DE19651683A1 (de) * 1996-12-12 1998-06-18 Otto Eckerle Füllstücklose Innenzahnradpumpe
DE19802443C1 (de) 1998-01-23 1999-05-12 Luk Fahrzeug Hydraulik Pumpe

Also Published As

Publication number Publication date
WO2001094788A1 (fr) 2001-12-13
US20040037729A1 (en) 2004-02-26
DE10192361D2 (de) 2003-05-08
EP1292771A1 (fr) 2003-03-19
DE50109002D1 (de) 2006-04-27
DE10027811A1 (de) 2001-12-13
ES2258532T3 (es) 2006-09-01

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