EP0891489B1 - Pompe a huile a engrenages a rotor interne, comportant des prolongements des elements reniformes d'aspiration et de refoulement - Google Patents

Pompe a huile a engrenages a rotor interne, comportant des prolongements des elements reniformes d'aspiration et de refoulement Download PDF

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Publication number
EP0891489B1
EP0891489B1 EP97953632A EP97953632A EP0891489B1 EP 0891489 B1 EP0891489 B1 EP 0891489B1 EP 97953632 A EP97953632 A EP 97953632A EP 97953632 A EP97953632 A EP 97953632A EP 0891489 B1 EP0891489 B1 EP 0891489B1
Authority
EP
European Patent Office
Prior art keywords
kidney
shaped
internal
rotor gear
suction
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
EP97953632A
Other languages
German (de)
English (en)
Other versions
EP0891489A1 (fr
Inventor
Harald Dehmel
Robert Laux
Bernd Schreiber
Günther Stützle
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.)
Schwaebische Huettenwerke Automotive GmbH
Original Assignee
Schwaebische Huettenwerke Automotive 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
Priority claimed from DE19747786A external-priority patent/DE19747786A1/de
Application filed by Schwaebische Huettenwerke Automotive GmbH filed Critical Schwaebische Huettenwerke Automotive GmbH
Publication of EP0891489A1 publication Critical patent/EP0891489A1/fr
Application granted granted Critical
Publication of EP0891489B1 publication Critical patent/EP0891489B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/101—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with a crescent-shaped filler element, located between the inner and outer intermeshing members
    • 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
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes

Definitions

  • the invention relates to an internal rotor gear oil pump with the features of the preamble of claim 1.
  • Internal rotor gear pumps are increasingly used as oil pumps for filling gearboxes or other pumps on the one hand, for lubricating internal combustion engines on the other hand. In all cases there are a. the requirements, one to generate the most uniform possible pulsation-free flow, the effects to minimize cavitation in the pump and the cavitation and pulsation associated with it Reduce noise.
  • the invention is directed to Internal rotor gear pumps for oil production according to these requirements improve.
  • the oil to be pumped is known pumps by one in the pump housing running suction channel essentially at the level of the tooth engagement between the inner and External rotor in a so-called suction kidney fed as tangentially as possible between the The teeth of the two runners are conveyed and if possible via a so-called pressure kidney tangential pressure channel out of the housing the consumption points fed.
  • suction and pressure channels only on one side, mostly for space reasons, the housing side, the Gear pair, while the opposite side closing the delivery chamber of the housing, usually the cover, has a smooth surface towards the inside of the pump.
  • the oil flow thus enters the delivery chambers on one side of the gear rotor pair and leaves it on the same side again.
  • Such a pump is e.g. B.
  • the invention changes those available for suction and pressure in the pump Spaces in such a way that on the inflow and outflow side, or at least the outflow side, opposite Side, usually in the lid, additional kidneys can be arranged in the correspond essentially to the suction and pressure kidneys, but especially from these partly deviate in their radial extension.
  • the suction kidneys are rare on both Runner pair designed essentially identically, the pressure kidney on the outflow side opposite side is opposite the end of the suction kidney Direction of conveyance withdrawn.
  • the distance is preferably on the inflow / outflow side so large that one tooth of the pair of runners is covered without a kidney is, while the distance on the opposite side is 1.5 to 2 teeth of the rotor pair is.
  • the dimension of the covers on the inflow / outflow side the opposite side is usefully dependent on the The speed at which the pump is to work is selected larger or smaller. Surprisingly has been shown that by the relatively simple additional design of the pump housing with kidneys of different sizes on both sides significant reduction in cavitation and thus the resulting Noises as well as the pulsation can be achieved.
  • the side opposite the inflow / outflow side Kidneys have no direct connection to the inflow or outflow channels, can be arranged even if this page is about Cover side of the pump.
  • the pump cover can namely because of the with the various arrangements of the pumps often only available to a limited extent standing space are usually not widened, and therefore leaves the arrangement of inflow or outflow channels.
  • the pump according to the invention can thus can also be used as a replacement for existing pump designs, without that changes would have to be made in the vicinity of the pump. This is of particular importance z. B. when using the pumps as lubricating oil pumps for Internal combustion engines in motor vehicles, where due to the otherwise associated prohibit high expenditure on design changes to the internal combustion engine.
  • FIGS. 1 to 5 show the housing and cover of a pump without kidney expansion 3 and 4 the pump design according to the invention also in Top view.
  • Fig. 5 shows the pump according to the invention in a section in the plane A-A of Figs. 3 and 4.
  • Fig. 1 shows a view of the pump housing 1 with holes for fastening screws 2 and a central bore for the drive shaft 3.
  • the Suction kidney 4 and, essentially radially opposite, the pressure kidney 5 are arranged.
  • the beginning of the pressure kidney 7 is a tooth division of that in the pump arranged inner rotor gear set (not shown).
  • FIG Cover 8 of the pump only for the holes corresponding to the housing Fixing screws and drive shaft on, but no kidneys to hold the oil to be extracted.
  • Fig. 3 shows that in the housing area of the pump even with the inventive Execution no changes are required.
  • the design of the pump housing is identical to that of the prior art.
  • the distance between the end of the suction kidney and the beginning of the pressure kidney is also a tooth pitch of the internal rotor gear set.
  • a "blind" suction kidney extension 9 and opposite the pressure kidney 5 also a “blind” pressure kidney extension 10. While the Suction kidney extension 9 in its contours essentially the opposite Suction kidney 4 corresponds and deviates from this only in that it is at an opening opposite to the feed channel, the pressure kidney extension 10 is on the area of the teeth of the inner rotor gear set. The beginning of the expansion of the kidney in the direction of rotation 11 is opposite the beginning of the pressure kidney 7 (cf. Fig. 3) withdrawn by 0.5 to 1 tooth pitch of the inner rotor gear set, so that the distance between the beginning of the pressure kidney extension 11 and the end the suction kidney extension 12 is 1.5 to 2 tooth pitches. The exact measure of The distance between the two boundary lines is dependent on that conveying fluid and the operating conditions of the pump so that a Minimization of cavitation and thus the noise level, the pressure pulsation and the Power consumption is achieved.
  • Fig. 5 shows a section through the pump design according to the invention on the Level A-A of FIGS. 3 and 4 the arrangement of the suction and pressure kidney extensions 9 and 10 in the cover 8 of the pump. It is also evident that the kidney enlargement in the outflow area only a part of the delivery space between the Covered teeth of the internal rotor gear set and that the suction and Pressure kidney extensions 9 and 10, compared to the suction and pressure kidneys 4 and 5, have a relatively shallower depth. This can, depending on the operating characteristics the pump, can also be varied for optimization.
  • the arrangement of the suction kidney extension 9 is not in all cases the use of appropriate pumps is required. For pumps that are below lower Speeds are running, a suction kidney extension can be omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Claims (5)

  1. Pompe à engrenages à rotor interne destinée à refouler des fluides, de préférence de l'huile dans des boítes à vitesses, pompes ou moteurs thermiques, dotée d'un jeu de pignons à rotor interne disposé à l'intérieur d'un carter de pompe (1) et entraíné par un arbre central, le carter de pompe (1) étant fermé par un couvercle (8) adjacent au carter de pompe et au jeu de pignons à rotor interne ainsi qu'avec au moins un rognon d'alimentation - c.-à.-d. d'aspiration - et un rognon d'évacuation - c.-à.-d. de pression - (4) ou (5) passant respectivement à l'intérieur du carter de pompe, dont les extrémités recouvrent tout ou partie des dents du jeu de pignons à rotor interne, respectivement en liaison avec l'écoulement du ou l'amenée au consommateur et des extensions de rognon d'aspiration ou de pression (9) ou (10) situées à l'intérieur du couvercle (8) en face des rognons d'aspiration ou de pression (4) ou (5) et qui sont respectivement en liaison indirecte avec l'écoulement du ou l'amenée au consommateur uniquement par les espaces intermédiaires entre les dents du jeu de pignons à rotor interne et les rognons d'aspiration ou de pression (4) ou (5),
    se caractérisant par
    le fait que, dans le sens du refoulement, l'extension du rognon de pression (10) est en retrait par rapport à l'extension du rognon d'aspiration (9) si bien que l'extension du rognon de pression (10) recouvre la zone des dents du jeu de pignons à rotor interne dans une moindre mesure que le rognon de pression situé en face (5).
  2. Pompe à engrenages à rotor interne selon l'exigence 1,
    se caractérisent par
    le fait que, dans le sens du refoulement, la configuration de l'extension du rognon de pression (10) va en s'amenuisant.
  3. Pompe à engrenages à rotor interne selon l'exigence 1,
    se caractérisant par
    le fait que l'écart entre l'extrémité de l'extension du rognon d'aspiration (12) et le commencement de l'extension du rognon de pression (11) dans le sens du refoulement est supérieur de 0,5 à 1 fois la largeur de dent du jeu de pignons à rotor interne par rapport à l'écart entre l'extrémité du rognon d'aspiration (6) et le commencement du rognon de pression (7) dans le sens du refoulement.
  4. Pompe à engrenages à rotor interne selon l'exigence 1,
    se caractérisant par
    le fait que la pompe à l'intérieur du couvercle (8) ne présente qu'une extension de rognon de pression (10) mais pas d'extension de rognon d'aspiration (9).
  5. Pompe à engrenages à rotor interne selon les exigences 1 à 4,
    se caractérisant par
    le fait que les rognons d'aspiration et de pression (4) ou (5), ainsi que les voies d'amenée et d'écoulement en direction de ou en provenance de ceux-ci se trouvent à l'intérieur du couvercle (8) de la pompe, alors que les extensions de rognon d'aspiration et de pression (9) ou (10) se trouvent à l'intérieur du carter de pompe (1).
EP97953632A 1996-12-16 1997-12-16 Pompe a huile a engrenages a rotor interne, comportant des prolongements des elements reniformes d'aspiration et de refoulement Expired - Lifetime EP0891489B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19651950 1996-12-16
DE19651950 1996-12-16
DE19747786A DE19747786A1 (de) 1996-12-16 1997-10-29 Innenläuferzahnradölpumpe
DE19747786 1997-10-29
PCT/DE1997/002931 WO1998027339A1 (fr) 1996-12-16 1997-12-16 Pompe a huile a engrenages a rotor interne, comportant des prolongements des elements reniformes d'aspiration et de refoulement

Publications (2)

Publication Number Publication Date
EP0891489A1 EP0891489A1 (fr) 1999-01-20
EP0891489B1 true EP0891489B1 (fr) 2003-03-12

Family

ID=26032199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97953632A Expired - Lifetime EP0891489B1 (fr) 1996-12-16 1997-12-16 Pompe a huile a engrenages a rotor interne, comportant des prolongements des elements reniformes d'aspiration et de refoulement

Country Status (4)

Country Link
US (1) US6089842A (fr)
EP (1) EP0891489B1 (fr)
JP (1) JP4278714B2 (fr)
WO (1) WO1998027339A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040101427A1 (en) * 2002-11-27 2004-05-27 Visteon Global Technologies Inc. Gerotor fuel pump having primary and secondary inlet and outlet portings
JP2007255369A (ja) * 2006-03-24 2007-10-04 Jatco Ltd 変速機のオイルポンプ構造

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3016834A (en) * 1957-10-07 1962-01-16 Eaton Mfg Co Rotary pumps
US3166018A (en) * 1963-11-08 1965-01-19 Jr Cresswell E Stedman Fluid pump body and gear set
US3834842A (en) * 1971-12-06 1974-09-10 Hydraulic Prod Inc Hydraulic power translating device
JP2544835Y2 (ja) * 1991-02-28 1997-08-20 株式会社ユニシアジェックス オイルポンプ

Also Published As

Publication number Publication date
JP4278714B2 (ja) 2009-06-17
WO1998027339A1 (fr) 1998-06-25
US6089842A (en) 2000-07-18
EP0891489A1 (fr) 1999-01-20
JP2000505862A (ja) 2000-05-16

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