EP0906512A1 - Pompe a ailettes - Google Patents

Pompe a ailettes

Info

Publication number
EP0906512A1
EP0906512A1 EP97929260A EP97929260A EP0906512A1 EP 0906512 A1 EP0906512 A1 EP 0906512A1 EP 97929260 A EP97929260 A EP 97929260A EP 97929260 A EP97929260 A EP 97929260A EP 0906512 A1 EP0906512 A1 EP 0906512A1
Authority
EP
European Patent Office
Prior art keywords
pressure
area
pressure plate
opposite
plate
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
EP97929260A
Other languages
German (de)
English (en)
Other versions
EP0906512B1 (fr
Inventor
Ivo Agner
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
Priority claimed from DE29612578U external-priority patent/DE29612578U1/de
Application filed by LuK Fahrzeug Hydraulik GmbH and Co KG filed Critical LuK Fahrzeug Hydraulik GmbH and Co KG
Publication of EP0906512A1 publication Critical patent/EP0906512A1/fr
Application granted granted Critical
Publication of EP0906512B1 publication Critical patent/EP0906512B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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
    • F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
    • 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

Definitions

  • the invention relates to a flight egg pump according to the preamble of claim 1.
  • Vane cell pumps of the type mentioned here are known. They have a rotor, in the circumferential wall of which slots that accommodate vanes are made. The rotor rotates within a contour ring, which preferably forms two crescent-shaped delivery spaces, which are traversed by the flights. When the rotor rotates, the space becomes larger and smaller. The operation of the wing cell pump thus results in suction and pressure areas. With a contour ring of the type mentioned here, there are two separate pump sections, each with a suction area and a pressure area.
  • the lateral limitation of the pressure range takes place on the outlet or front side by means of a close-fitting pressure plate and on the side opposite the front side, for example by the housing of the wing cell pump. 7/49915 PC ⁇ 7EP97 / 03277
  • the fluid required by the vane cell pump for example hydraulic oil
  • its viscosity increases, so that the mobility of the wings decreases.
  • the still separate pump section demands the fluid.
  • the delivery rate is greatly reduced, since there is a hydraulic connection between the conveying lower pressure area to the opposite upper pressure area and there to the suction area.
  • the vane cell pump has two pressure plates lying close to the rotor, the pressure plate opposite the front side having an opening which establishes a fluid connection between a preferably lower pressure area and a closed pressure chamber.
  • pressure is built up in this pressure chamber, which bends the pressure plate slightly towards the rotor and presses it tightly against the rotor.
  • the pressure built up in the conveying area leads in the same way to a force being exerted on the forward pressure plate which presses this pressure plate close to the rotor.
  • a short circuit between the two pressure areas across the pressure space is avoided by the fact that only one of the two pressure areas is connected to the pressure space in the pressure plate opposite the front side.
  • the other pressure range of the pump is sealed by the pressure plate to the pressure chamber.
  • At least one of the fluid connections in the pressure plate opposite the delivery side has a passage area which is smaller than 1/3 of the passage area of the outlet opening of the delivery side pressure plate.
  • the pressure plate which closes the pressure chamber and which comprises an opening for connecting the lower pressure region to the pressure chamber has a further relatively small opening which flows from the pressure chamber into the other pressure region located above.
  • this opening the pressure chamber can be vented when the pump is started up for the first time, with the advantageous result of a noise reduction.
  • it In order to prevent a short circuit via this venting opening, it must be designed in such a way that it has a very high hydraulic resistance for a cold fluid of high viscosity.
  • an opening is provided on the pressure plate opposite the delivery side, which connects the upper pressure area in the installed position to the pressure chamber.
  • the pressure area located below is sealed off by the pressure plate from the pressure chamber.
  • An advantageous embodiment also consists in the pressure plate opposite the front side to be provided with two openings, each of which creates a connection between a pressure area and the pressure chamber and which have a high hydraulic resistance. The sum of the two resistances must exceed a value which is necessary to avoid a short circuit in the cold start phase.
  • Figure 1 is a schematic sectional view of a vane cell pump
  • FIG. 1 Two pressure plates of the air cell pump, 2a, 2b and
  • Figures show schematic representations of four differently designed air cell pumps.
  • a joint pump For a better understanding, the structure of a joint pump will first be discussed in general with reference to FIG. 1.
  • This comprises a housing 1 in which a channel 3 leading to an outlet is provided.
  • a consumer for example a power steering device, is supplied with a fluid, for example hydraulic oil, via the outlet.
  • the housing has a circular interior 5, which has a contour ring 7 and a rotor 9. takes, in the circumferential pool wing 8 receiving slots are introduced.
  • the rotor 9 is set in rotation by means of a drive shaft 11, so that the vanes 8 move within the contour ring 7, the interior 5 of which is designed in such a way that two crescent-shaped free spaces, which are also referred to as forward spaces, are formed by the Be flown through. Between each two adjacent flights - seen in the circumferential direction - there are so-called flight egg cells, which become smaller and larger when the rotor rotates. This creates suction and pressure areas.
  • the end faces of the contour ring 7 and the rotor 9 rest on sealing surfaces which are formed by pressure plates 17.1 and 17.2.
  • the pressure plate 17.1 facing the front side is referred to as the pressure plate on the customer side and the other pressure plate 17.2 as the pressure plate on the pressure chamber side.
  • the unit formed from the two pressure plates 17.1 and 17.2, the contour ring 7 and the rotor 9 thus lies in the interior 5 of the housing.
  • At least the pressure-side pressure plate 17.1 facing the channel 3 or outlet is designed such that the hydraulic oil required by the egg cells is required through the pressure plate and into an outlet area formed between the pressure plate and the inside of the housing and from there to the consumer.
  • the vane cell pump is constructed in such a way that the hydraulic oil in the pressure area reaches the underside of the wing lying in the interior of the rotor - the so-called lower wing area - and pressurizes it.
  • the wings are pressed radially outward from the slots and thus lie sealingly on the inside of the contour ring.
  • FIG. 2a or 2b The surfaces of the two pressure plates 17.1 and 17.2 facing the rotor 9 are shown in plan view in FIG. 2a or 2b. Two suction areas 21 and two kidney-shaped pressure areas 23 can be clearly seen in each case. Further inside, in the pressure plate-side pressure plate 17.2 according to FIG. 2a, an essentially annular groove 25 is provided for the lower wing areas. In contrast, four independent, essentially annular segment-shaped grooves 27 are formed in the pressure plate 17.1 according to FIG. 2b.
  • FIG. 2a also shows that the kidney-shaped pressure areas 23 of the pressure plate-side pressure plate 17.2 merge into round channels 29. At least one or both channels 29 have a passage area, that is to say a cross-sectional area through which flow passes, which is less than 1/3 of the passage area of the pressure areas 23 of the pressure plate 17.1 on the forward side.
  • FIG. 3 four different embodiments of the vane cell pump are shown in a highly simplified manner, with the different configurations of the pressure plates being essential. For this reason, the remaining details, in particular the rotor, blades, shaft, etc., are not shown.
  • the vane cell pump according to FIG. 3a has both on the outlet or front side F of the rotor also on the opposite pressure chamber side D a pressure plate 17.1 or 17.2. Both pressure plates 17 lie close to the contour ring and rotor 51 and are thus intended to prevent leakage of hydraulic oil from the pressure areas.
  • FIG. 3a The illustration of the pressure plate 17.1 on the outside in FIG. 3a shows two outlet channels 53.1 and 53.2, each of which establishes a fluid connection between a pressure area and a claims or outlet area 55.
  • the pressure plate 17.2 on the pressure chamber side bears against the rotor 51 on the opposite side. It also has a channel 59 which establishes a fluid connection between a pressure region UD, which is lower in the figure, and a pressure chamber 61.
  • This pressure chamber 61 is formed on the one hand by the pressure plate 17.2 on the pressure chamber side and on the other hand by the housing.
  • openings 63a, 63b are also provided, which open into the respective lower wing area of the wings. This creates a fluid connection between the lower pressure area and at least one lower wing area.
  • FIG. 3b differs from the one described above only in that the opening 63 opening into the lower wing area is not provided in the pressure plate 17.2 on the pressure chamber side but in the pressure plate 17.1 on the forward side.
  • the channel 59 of the pressure plate 17.2 is not assigned to the lower pressure area but to the upper pressure area. However, this does not change the mode of operation of the two pressure plates after the start-up phase.
  • FIG. 3c A third embodiment can be seen in FIG. 3c, which essentially corresponds to the embodiment shown in FIG. 3a.
  • the pressure plate 17.2 on the pressure chamber side there is a small channel 65, which essentially serves for ventilation and creates a connection between the pressure chamber 61 and the upper pressure region.
  • the cross section of the channel 65 is dimensioned so that its hydraulic resistance is very high, especially for cold hydraulic oil with a high viscosity. Resistance should be on everyone Case should be so large that in the cold start phase an oil flow from the lower pressure area via the pressure chamber 61 and the channel 65 to the upper pressure area, where the short circuit prevails, and then to the suction area is almost prevented.
  • this ventilation duct 65 The function of this ventilation duct 65 is to allow air collecting in the upper region of the pressure chamber 61 to escape. Therefore, this ventilation duct 65 is to be assigned to the pressure range above. The venting of the pressure chamber 61 thus achieved makes it possible to reduce noise.
  • FIG. 3d shows a further exemplary embodiment in which the pressure plate 17.2 on the pressure chamber side has two channels 71.
  • the upper channel 71.1 connects the upper pressure area to the pressure chamber 61
  • the lower channel 71.2 connects the lower pressure area to the pressure chamber 61.
  • the cross sections of the two channels 71 are chosen so that the sum of the two individual hydraulic resistances for a viscous, cold oil is so large that almost no oil flow develops between the two pressure areas through the pressure chamber 61.
  • FIGS. 3e and 3f show two further exemplary embodiments of how a hydraulic resistance can be implemented on the pressure chamber side, which for example, can be used instead of the small cross sections shown in Figure 3d.
  • a web 77 can be provided on the housing, which limits the oil flow in the cold start phase between the lower and upper pressure range.
  • this can of course also be formed on the pressure plate 17.2, as shown in FIG. 3f.
  • other configurations of a hydraulic resistance are also conceivable.

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 à ailettes comprenant un rotor portant les ailettes, deux plaques de pression (17) reposant de manière étanche sur le rotor, dont une est disposée sur la face de refoulement de la pompe à ailettes et l'autre, sur la face opposée, ainsi qu'une bague profilée formant deux zones d'aspiration et de pression. Au moins une des deux plaques de pression est munie d'ouvertures d'entrée et de sortie (53, 59, 63a,b) qui établissent une liaison fluidique entre une zone de pression et une zone sous ailette. L'invention se caractérise en ce que la plaque de pression (17,2) opposée à la face refoulement comporte une ouverture qui établit une liaison fluidique entre une zone de pression et une chambre de pression (61) délimitée en partie par cette plaque de pression (17,2) et rend la chambre de pression (61) étanche par rapport à l'autre zone de pression.
EP97929260A 1996-06-21 1997-06-23 Pompe a ailettes Expired - Lifetime EP0906512B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE29610896 1996-06-21
DE29610896U 1996-06-21
DE29612578U 1996-07-20
DE29612578U DE29612578U1 (de) 1996-06-21 1996-07-20 Flügelzellenpumpe
PCT/EP1997/003277 WO1997049915A1 (fr) 1996-06-21 1997-06-23 Pompe a ailettes

Publications (2)

Publication Number Publication Date
EP0906512A1 true EP0906512A1 (fr) 1999-04-07
EP0906512B1 EP0906512B1 (fr) 2002-10-23

Family

ID=26059109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97929260A Expired - Lifetime EP0906512B1 (fr) 1996-06-21 1997-06-23 Pompe a ailettes

Country Status (5)

Country Link
US (1) US6152716A (fr)
EP (1) EP0906512B1 (fr)
JP (1) JP4206132B2 (fr)
DE (1) DE19780598D2 (fr)
WO (1) WO1997049915A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10027811A1 (de) * 2000-06-05 2001-12-13 Luk Fahrzeug Hydraulik Pumpe
GB2383611B (en) * 2001-10-15 2005-04-06 Luk Automobiltech Gmbh & Co Kg Rotary vane-type machine
EP1672218B1 (fr) * 2004-12-18 2013-11-06 ixetic Bad Homburg GmbH Pompe
US7361001B2 (en) * 2005-01-11 2008-04-22 General Motors Corporation Hydraulic vane pump
CA2679776A1 (fr) * 2008-10-08 2010-04-08 Magna Powertrain Inc. Pompe a ailettes, a commande directe de debit
US8632321B2 (en) * 2008-11-07 2014-01-21 Magna Powertrain Inc. Fully submerged integrated electric oil pump
US8696326B2 (en) * 2009-05-14 2014-04-15 Magna Powertrain Inc. Integrated electrical auxiliary oil pump
DE112010002098A5 (de) 2009-05-27 2012-09-06 Ixetic Bad Homburg Gmbh Pumpe, insbesondere flügelzellenpumpe
JP5214644B2 (ja) * 2010-02-09 2013-06-19 ジヤトコ株式会社 自動変速機用オイルポンプの空気抜き構造

Family Cites Families (11)

* 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
US3787151A (en) * 1972-07-07 1974-01-22 Trw Inc Stack-up assembly
DE2735824C2 (de) * 1977-08-09 1986-01-23 Vickers Systems GmbH, 6380 Bad Homburg Flügelzellenpumpe, insbesondere zur Lenkhilfe
DE2835816C2 (de) * 1978-08-16 1984-10-31 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Drehkolbenpumpe
JPS5928853A (ja) * 1982-08-06 1984-02-15 Mitsubishi Electric Corp 回転電機
US4505654A (en) * 1983-09-01 1985-03-19 Vickers Incorporated Rotary vane device with two pressure chambers for each vane
WO1987000587A1 (fr) * 1985-07-26 1987-01-29 Zahnradfabrik Friedrichshafen Ag Pompe a aubes
JPH01155096A (ja) * 1987-12-10 1989-06-16 Suzuki Motor Co Ltd ベーン型回転圧縮機
US5147183A (en) * 1991-03-11 1992-09-15 Ford Motor Company Rotary vane pump having enhanced cold start priming
US5266018A (en) * 1992-07-27 1993-11-30 Vickers, Incorporated Hydraulic vane pump with enhanced axial pressure balance and flow characteristics
JPH09158868A (ja) * 1995-12-08 1997-06-17 Zexel Corp ベーン型圧縮機

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9749915A1 *

Also Published As

Publication number Publication date
DE19780598D2 (de) 1999-04-01
JP2000512709A (ja) 2000-09-26
WO1997049915A1 (fr) 1997-12-31
EP0906512B1 (fr) 2002-10-23
US6152716A (en) 2000-11-28
JP4206132B2 (ja) 2009-01-07

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