EP0297147B1 - Pompe à engrenage interne utilisée comme pompe de graissage - Google Patents

Pompe à engrenage interne utilisée comme pompe de graissage Download PDF

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Publication number
EP0297147B1
EP0297147B1 EP19870109020 EP87109020A EP0297147B1 EP 0297147 B1 EP0297147 B1 EP 0297147B1 EP 19870109020 EP19870109020 EP 19870109020 EP 87109020 A EP87109020 A EP 87109020A EP 0297147 B1 EP0297147 B1 EP 0297147B1
Authority
EP
European Patent Office
Prior art keywords
rotor
pump
inner rotor
gear pump
annular gear
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
EP19870109020
Other languages
German (de)
English (en)
Other versions
EP0297147A1 (fr
Inventor
Hans A. Dipl.-Ing. Härle
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
Application filed by Schwaebische Huettenwerke Automotive GmbH filed Critical Schwaebische Huettenwerke Automotive GmbH
Priority to DE8787109020T priority Critical patent/DE3772386D1/de
Priority to ES87109020T priority patent/ES2025589T3/es
Priority to EP19870109020 priority patent/EP0297147B1/fr
Publication of EP0297147A1 publication Critical patent/EP0297147A1/fr
Application granted granted Critical
Publication of EP0297147B1 publication Critical patent/EP0297147B1/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
    • 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

Definitions

  • the invention relates to an internal gear pump as a lubricating oil pump for an internal combustion engine, with a pump housing with an inner rotor with external teeth, which meshes with an eccentrically arranged external rotor with internal teeth, with an inlet and with an outlet, the drive shaft of the internal combustion engine for torque transmission directly or via a connecting member is connected to the inner rotor and the outer rotor is fixed in the pump housing, and guide members are provided for radial guidance of the inner rotor between the inner rotor and the pump housing and / or the pump cover.
  • the axial guidance of the outer rotor and the inner rotor is generally achieved in gear pumps of the type mentioned at the beginning by end faces in the pump housing and the pump cover.
  • the inner rotor is provided with a collar on one or both sides in the hub area.
  • the one or two side collars are located in recesses in the pump housing and / or the pump cover, as a result of which the inner rotor is also guided securely in the radial direction.
  • an inner sleeve is generally provided for this purpose, on which the inner rotor with its two side collars is arranged with play, but in a rotationally fixed manner.
  • the inner bush in turn sits firmly on the crankshaft. In this way, the game of the crankshaft is absorbed by the game between the inner sleeve and the inner peripheral wall of the inner rotor.
  • GB-A-2047809 discloses an internal gear pump of this type.
  • the present invention is therefore based on the object of providing an internal gear pump of the type mentioned at the outset, the manufacture of which is simple and cheap, and at the same time simple assembly should also be provided.
  • this object is achieved in that the guide members are formed only by at least one recess in at least one end face of the inner rotor and by an extension in the pump housing or the pump cover, the extension projecting into the recess.
  • the inner rotor makes the inner rotor much easier and cheaper to manufacture than the previously known inner rotors.
  • the inner rotor can be pressed in one operation if it is made of sintered metal consists. So far, the inner rotor with its two side collars had to be turned first and then turned. No special further processing is now necessary. Only the two smooth side surfaces are ground on the outside if necessary. In addition, it is advantageous that this results in a material saving for the inner rotor.
  • the internal gear pump according to the invention has a lower power consumption, since less friction (bearing friction) occurs.
  • the recess or the recesses can have any shape, with the lugs in the pump housing or the pump cover correspondingly being fitted to the recesses.
  • one or more indentations in an end face of the inner rotor can be arranged distributed over the circumference below the ring gear.
  • the recess can have one or more shoulders on which the shoulder (s) rest.
  • the recess can be designed as an annular groove, the attachment in the pump housing or the pump cover forming an annular attachment which can be fitted into the annular groove or which bears against the outer annular groove wall.
  • the recess has an annular shape, forming an abutment shoulder for the attachment on its outer peripheral wall.
  • An embodiment of the approach according to the invention can consist in that it is designed as a projection which protrudes from the pump housing into the recess, recess or annular groove of the inner rotor.
  • the approach to the pump housing is in one piece, which means that no separate part is necessary; rather, the approach to the manufacture of the pump housing, e.g. by pouring or spraying.
  • the approach can also be designed as a separate socket, which is fastened in the pump housing or in the pump cover.
  • the projection can also be in one piece with the pump cover. In this case, it is only necessary that the pump cover is connected to the pump housing in a precisely centered manner.
  • a separate socket can be connected to the pump housing or the pump cover in a number of ways.
  • the inner rotor is provided with torque transmission elements and can be connected either directly or indirectly to the crankshaft.
  • the inner rotor with radial play is arranged in a rotationally fixed manner on an inner bush which is fastened to the drive shaft.
  • the internal gear pump is basically of a known design, which is why only the parts essential to the invention are described in more detail below.
  • the internal gear pump has a pump housing 1 which is connected in any way to the motor, e.g. is flanged to the motor housing of an internal combustion engine. On the outside, the pump housing is closed off by a cover 2. Between the cover 2 and the pump housing 1 there is an outer rotor 3 which is fixedly arranged in the pump housing 1 and an inner rotor 4. The inner rotor has an external toothing and the outer rotor 3 has an internal toothing.
  • a crescent-shaped sealing part 7 can serve in a known manner for sealing between a suction kidney 5 and a pressure kidney 6. The function and mode of operation of the sealing part 7 are generally known.
  • the lubricant or oil is introduced via the suction kidney 5 as an inlet into the pump housing and led out via the pressure kidney 6 as an outlet.
  • the sealing part 7 is not absolutely necessary within the scope of the invention. Rather, a configuration of the internal gear pump is also possible, in which the sealing is carried out by the teeth themselves.
  • the inner rotor 4 has two mutually opposite, inwardly projecting webs 8 which protrude into grooves 9 of an inner bush 10.
  • the inner bush 10 is fixedly attached to the crankshaft of the internal combustion engine (not shown). How out 2 can be seen, there is a game between the inner sleeve 10 and the inner peripheral wall of the inner rotor 4, whereby the radial play of the crankshaft, not shown, is absorbed.
  • the outer rotor 3 and inner rotor 4 are guided axially through end faces in the pump housing and the cover 2. Radial guidance is provided by a shoulder 12 in the pump housing 1, which is introduced into the inner rotor 4 from an end face of the inner rotor in a recess in the form of an annular recess 13.
  • the recess 13 has an outer shoulder 14 on which the attachment 12 bears with its outer side.
  • the inner rotor 4 is practically centered on the also annular approach.
  • the indentation 13 is open on the inside. As can be seen from FIG. 1, this results in a stepped screw-in or blind bore which is approximately half the width of the inner rotor 4.
  • FIG. 1 the ring-shaped extension 12 is shown as a separate bush which is pressed into the pump housing 1 or is connected to the pump housing 1 in a rotationally fixed manner in any other way.
  • FIG. 3 shows an embodiment of the extension 12, in which it is integral with the pump housing 1 and projects into the recess 13 as a projection or nose 12A. The remaining parts in FIG. 3 correspond to those shown in FIG. 1 Share. Only the inner bushing 10 is missing, because in this exemplary embodiment the inner rotor 4 is fastened directly on the crankshaft, not shown, for example by means of a spline or the like.
  • the extension 12 protrudes from the pump housing 1 into the recess 13 of the inner rotor 4.
  • the extension it is also possible for the extension to protrude from the pump cover 2 into a recess 13 of the inner rotor 4, in which case this extends into the Front face of the inner rotor 4 is introduced.
  • indentations in segment form can naturally also be present within the scope of the invention, into which corresponding attachment portions protrude from the pump housing 1.
  • annular groove can also be provided instead of a recess 12 in the form of a step, with no inner wall being present.

Claims (8)

  1. Pompe à engrenage intérieur utilisée comme pompe à huile pour la lubrification d'un moteur à combustion, comportant un corps de pompe (1), un rotor intérieur (4) pourvu d'une denture extérieure qui s'engrène dans une denture intérieure d'un rotor extérieur (3) excentrique par rapport au rotor intérieur, une entrée et une sortie de liquide, l'arbre moteur du moteur à combustion étant couplé au rotor intérieur (4) pour lui transmettre un couple directement ou par l'intermédiaire d'un élément de raccordement, le rotor extérieur (3) étant guidé dans le corps de pompe (1), et des éléments de guidage étant prévus entre le rotor intérieur et le corps de pompe (1) et/ou le couvercle de pompe pour guider radialement le rotor intérieur (4), caractérisée en ce que les éléments de guidage sont formés uniquement par une ou plusieurs gorges tournées (13) au-dessous de la denture dans la face frontale du rotor intérieur (4) et par un élément protubérant (12) du corps (1) ou du couvercle (2) de la pompe, ladite gorge (13) comportant au moins une paroi périphérique extérieure ayant un épaulement (14) contre lequel s'appuie l'élément protubérant (12), de façon à centrer le rotor intérieur (4) dans sa position par rapport à l'axe central et le guider avec un jeu radial par rapport à l'arbre moteur.
  2. Pompe selon la revendication 1, caractérisée en ce que la gorge tournée (13) est formée par une rainure annulaire dans laquelle est engagé l'élément protubérant (12) de forme annulaire.
  3. Pompe selon la revendication 1 ou 2, caractérisée en ce que l'évidement formé par la rainure annulaire ou gorge tournée (13) s'étend sur la moitié de la largeur du rotor intérieur (4).
  4. Pompe selon l'une des revendications 1 à 3, caractérisée en ce que l'élément protubérant (12) est formé par une partie protubérante (12A) du corps de pompe (1), laquelle s'étend à partir du corps de pompe dans l'évidement, gorge tournée ou rainure annulaire, du rotor intérieur (4).
  5. Pompe selon l'une des revendications 1 à 3, caractérisée en ce que l'élément protubérant est formé par une douille (12) qui est montée dans le corps de pompe (1).
  6. Pompe selon la revendication 5, caractérisée en ce que la douille (12) est chassée dans le corps de pompe (1).
  7. Pompe selon les revendications 1 à 6, caractérisée en ce que le rotor intérieur (4) comporte, sur sa surface intérieure, des éléments de transmission de couple pour être lié en rotation à l'arbre moteur.
  8. Pompe selon les revendications 1 à 7, caractérisée en ce que le rotor intérieur (4) est monté avec un jeu radial et de manière liée en rotation sur une douille intérieure (10) qui est fixée sur l'arbre moteur.
EP19870109020 1987-06-23 1987-06-23 Pompe à engrenage interne utilisée comme pompe de graissage Expired - Lifetime EP0297147B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8787109020T DE3772386D1 (de) 1987-06-23 1987-06-23 Innenzahnradpumpe als schmieroelpumpe.
ES87109020T ES2025589T3 (es) 1987-06-23 1987-06-23 Bomba de ruedas dentadas interiores como bomba de aceite lubrificante.
EP19870109020 EP0297147B1 (fr) 1987-06-23 1987-06-23 Pompe à engrenage interne utilisée comme pompe de graissage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19870109020 EP0297147B1 (fr) 1987-06-23 1987-06-23 Pompe à engrenage interne utilisée comme pompe de graissage

Publications (2)

Publication Number Publication Date
EP0297147A1 EP0297147A1 (fr) 1989-01-04
EP0297147B1 true EP0297147B1 (fr) 1991-08-21

Family

ID=8197086

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870109020 Expired - Lifetime EP0297147B1 (fr) 1987-06-23 1987-06-23 Pompe à engrenage interne utilisée comme pompe de graissage

Country Status (3)

Country Link
EP (1) EP0297147B1 (fr)
DE (1) DE3772386D1 (fr)
ES (1) ES2025589T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3923019A1 (de) * 1989-07-12 1991-01-17 Bayerische Motoren Werke Ag Pumpenanordnung an einer maschine, insbesondere schmieroelpumpe an einer brennkraftmaschine
JPH05202861A (ja) * 1991-10-30 1993-08-10 Nippondenso Co Ltd 歯車式ポンプ
EP0987437B1 (fr) 1998-09-15 2003-06-18 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Pompe à engrenages internes

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR508586A (fr) * 1919-07-26 1920-10-15 Henri Negre Pompe rotative
DE1163679B (de) * 1959-05-14 1964-02-20 Teves Kg Alfred Hydrostatische Drehkolbenmaschine
SE322988B (fr) * 1965-05-12 1970-04-20 Sundstrand Corp
DE2916666A1 (de) * 1979-04-25 1980-10-30 Ford Werke Ag Schmieroelpumpe fuer brennkraftmaschinen
US4496297A (en) * 1981-06-02 1985-01-29 Mitsubishi Denki Kabushiki Kaisha Rotary vane pump with overlapping rotor and housing portions
DE3410015C2 (de) * 1984-03-19 1995-09-28 Schwaebische Huettenwerke Gmbh Innenläuferzahnradölpumpe für Kraftfahrzeugmotoren und automatische Kraftfahrzeuggetriebe
AT389739B (de) * 1984-09-21 1990-01-25 Avl Verbrennungskraft Messtech Viertakt-brennkraftmaschine mit einer als zahnradpumpe ausgebildeten schmieroelpumpe
IT1184924B (it) * 1985-03-22 1987-10-28 Weber Spa Pompa di alimentazione del combustibile ad azionamento elettrico
DE3628163A1 (de) * 1986-08-20 1987-12-10 Daimler Benz Ag Lagerung fuer ein antriebszahnrad einer innenzahnradpumpe

Also Published As

Publication number Publication date
ES2025589T3 (es) 1992-04-01
DE3772386D1 (de) 1991-09-26
EP0297147A1 (fr) 1989-01-04

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