EP1311762B1 - Pompe a engrenages a denture interieure - Google Patents

Pompe a engrenages a denture interieure Download PDF

Info

Publication number
EP1311762B1
EP1311762B1 EP01960144A EP01960144A EP1311762B1 EP 1311762 B1 EP1311762 B1 EP 1311762B1 EP 01960144 A EP01960144 A EP 01960144A EP 01960144 A EP01960144 A EP 01960144A EP 1311762 B1 EP1311762 B1 EP 1311762B1
Authority
EP
European Patent Office
Prior art keywords
sealing plate
internal gear
gear pump
spring
pump according
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
EP01960144A
Other languages
German (de)
English (en)
Other versions
EP1311762A1 (fr
Inventor
Stanislaw Bodzak
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 GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1311762A1 publication Critical patent/EP1311762A1/fr
Application granted granted Critical
Publication of EP1311762B1 publication Critical patent/EP1311762B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/10—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
    • F04C14/14—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by changing the positions of the inlet or outlet openings with respect to the working chamber using rotating valves
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/70—Safety, emergency conditions or requirements
    • F04C2270/701—Cold start

Definitions

  • the invention relates to an internal gear pump for conveying fuel from a suction channel in a pressure channel, with a pump housing, in which an internally toothed ring gear and driven by a drive shaft external gear pinion are mounted, wherein the pinion is arranged eccentrically to the toothed ring and for generating a pumping action cooperates with the toothed ring, wherein the pinion and the toothed ring abut with its one end face on the pump housing and with its other end face on a sealing plate.
  • Such an internal gear pump is known for example from US-A-3 515 496 and is also referred to as a gerotor pump or gerotopump.
  • the toothed ring and the pinion represent the pump elements and are also referred to as outer rotor and inner rotor.
  • DE 38 27 573 A1 an internal gear pump is described, the toothed ring is driven by an electric motor.
  • the existing between the teeth of the two pump elements conveying chambers of the internal gear pump are covered in the axial direction by a pressure plate. Trained as a compression spring coil spring, which is biased against the pressure plate, when starting the internal combustion engine ensures that the axial play is equal to zero.
  • the object is in an internal gear pump for conveying fuel from a suction channel in a pressure channel, with a pump housing in which an internally toothed ring and a drive shaft driven by an externally toothed pinion are mounted, wherein the pinion is arranged eccentrically to the toothed ring and for generating a Pumping action cooperates with the toothed ring, wherein the pinion and the toothed ring abut with its one end face on the pump housing and with its other end face on a sealing plate, achieved in that the suction channel is arranged in the sealing plate, and that the sealing plate relative to the pump housing so is movable, that the distance between the suction channel and the pressure channel can be changed.
  • a particular embodiment of the invention is characterized in that the suction channel is formed by an elongated recess in the circumferential direction of the sealing plate, and that the sealing plate is rotatable relative to the pump housing between two positions.
  • the two positions of the sealing plate are made possible by abutment surfaces which are formed on the sealing plate.
  • Another particular embodiment of the invention is characterized; in that the sealing plate is prestressed in the axial direction by means of a spring, which is coupled to the pump housing and to the sealing plate.
  • a spring which is coupled to the pump housing and to the sealing plate.
  • Another particular embodiment of the invention is characterized in that the spring is biased in the circumferential direction against the drive direction of the internal gear pump. Due to the spring preload in the circumferential direction is achieved that the sealing plate only rotated when a certain speed of the pinion is exceeded.
  • the spring comprises two curved legs which at one end with each other connected and coupled to the sealing plate, and which are coupled at the other end to the pump housing. Due to the inventive design of the spring, a bias of the spring in both the axial direction and in the circumferential direction is made possible by simple means.
  • Another particular embodiment of the invention is characterized in that on the side facing away from the toothed ring and the pinion side of the sealing plate at a certain distance a pin is axially displaceable, which cooperates with a further spring to counteract a movement of the sealing plate in the axial direction ,
  • the distance between the sealing plate and the pin is chosen so that the sealing plate comes in full load operation on one end of the pin to the plant.
  • the biasing force of the other spring, its spring rate and the displacement of the sealing plate in the axial direction to a stop define the maximum operating pressure of the internal gear pump.
  • suction channel is in communication with a fuel inlet whose longitudinal axis coincides with the longitudinal axis of the drive shaft. This design has proven to be particularly advantageous in practice.
  • Another particular embodiment of the invention is characterized in that the fuel inlet opens into a sleeve in which the further spring is received and are mounted in the radial holes for the passage of fuel.
  • the sleeve forms a stop which limits the axial movement of the sealing plate.
  • a bypass valve is housed, which communicates via an axial bore with the suction channel and via a second axial bore with the pressure channel in connection.
  • a bypass valve in the context of the present invention means axially in the direction of the longitudinal axis of the drive shaft of the internal gear pump.
  • the bypass valve allows, e.g. with the help of an additional hand-operated pump to pump the fuel at the same when the internal gear pump is not driven.
  • the internal gear pump shown in Figures 1 to 4 comprises a pump housing 1.
  • a drive shaft 2 is rotatably mounted.
  • an internal gear or pinion 3 is driven, which is attached to the end of the drive shaft 2 by means of a tolerance ring 4.
  • the internal gear 3 is in engagement with an external gear 5, which is also referred to as a toothed ring.
  • the external gear 5 is surrounded by a bearing ring 6 which is fixed by means of screws 7 and 8 on the pump housing 1.
  • the screw heads of the screws 7 and 8 are designated 9 and 10.
  • the drive shaft 2 is biased by means of a plate spring 12, which is supported against an attached in a groove of the drive shaft 2 Seeger ring 11, away from the internal gear 3 to the left.
  • a plate spring 12 which is supported against an attached in a groove of the drive shaft 2 Seeger ring 11, away from the internal gear 3 to the left.
  • the internal gear 3 is held on the pump housing 1 in abutment.
  • a sealing plate 13 At the other end of the gears 3 and 5 is a sealing plate 13 at.
  • the sealing plate 13 is held by means of a spring 14 in contact with the gears 3 and 5.
  • the spring 14 comprises, as can be seen in Figure 3, two curved legs 15 and 16. Two bent ends of the curved legs 15 and 16 are received in a blind hole 27 of the sealing plate 13. The other two ends of the legs 15 and 16 are attached to the screw heads 9 and 10 and thus on the pump housing 1.
  • connection bores 21 and 20 The suction channel 18 and the pressure channel 19 are connected via connection bores 21 and 20 with a bypass valve 22 in connection.
  • the spring-biased check valve 22 When the spring-biased check valve 22 is opened, the two communication holes 20 and 21 communicate with each other.
  • the bypass valve 22 When the bypass valve 22 is closed, the communication between the communication holes 20 and 21 is closed, and the pressure passage 19 communicates with a pressure port 23 via the communication bore 20.
  • the recessed in the sealing plate 13 suction channel communicates with a suction chamber 24 in communication, which is surrounded by a housing cover 35.
  • the housing cover 35 is placed on the Pumpengekorue 1.
  • a central fuel inlet bore 36 is recessed.
  • FIG. 1 it can be seen that on the side facing away from the drive shaft 2 side of the sealing plate 13, a pin 28 is arranged. Between the sealing plate 13 and a Front side of the pin 28 is provided a certain distance. The pin 28 is acted upon by the biasing force of a compression spring 29 which is received in a sleeve 30. In addition, the pin 28 is slidably guided in the sleeve 30 in the axial direction. The sleeve 30 is fixed coaxially to the fuel inlet bore 36 in the interior of the housing cover 35. In the lateral surface of the sleeve 30 holes 31 and 32 are recessed to ensure the passage of fuel from the fuel inlet 36 into the suction chamber 24.
  • the internal gear 3 of the pump is driven by the drive shaft 2 and the tolerance ring 4.
  • the diaphragm spring 12 also holds the internal gear 3 in contact against the plane surface of the pump housing 1, against any axial force from the input clutch.
  • the pump housing 1 supports the drive shaft 2 and includes the pressure passage 19, the communication bore 20 to the pressure port 23, and the bypass valve 22
  • the bore 21 connects the bypass valve 22 with the suction chamber 24 of the internal gear pump and allows, for example by a hand-operated pump to convey the fuel with non-driven internal gear pump on the pumping elements.
  • the pump housing 1 is supported by means of the bearing ring 6, the outer gear 5.
  • the sealing plate 13 is applied without play in the start state to the gears 3 and 5 and slightly pressed by the spring 14.
  • the force of the spring 14 is designed for the start of the internal gear pump so that a sufficient fuel pressure to fill the low pressure system is ensured.
  • the second function of the spring 14 is to hold the sealing plate 13 during the starting process in a rotated against the gear direction of rotation position. This position guarantees maximum delivery Starting speed. Die.Dichtplatte 13 is therefore pressed by the spring 14 against the gear direction of rotation of the stop 26, designed as a screw head 10.
  • the plate 13 has no contact with the bearing ring 6, which is achieved by a clearance of about 0.01 mm.

Claims (9)

  1. Pompe à engrenage à denture intérieure pour refouler du carburant d'un canal d'aspiration (18) dans un canal de refoulement (19) comprenant un boîtier de pompe (1) logeant une couronne dentée (5) à denture intérieure et un pignon (3) à denture extérieure entraîné par un arbre d'entraînement (2),
    le pignon (3) étant installé de manière excentrée par rapport à la couronne dentée (5) et coopère avec la couronne dentée (5) pour créer un effet de pompage,
    le pignon (3) et la couronne dentée (5) s'appliquant par l'une de leur face contre le boîtier (1) de la pompe et par l'autre, contre une plaque d'étanchéité (13),
    caractérisée en ce que
    le canal d'aspiration (18) est prévu dans la plaque d'étanchéité (13) et la plaque d'étanchéité (13) est mobile par rapport au boîtier de pompe (1) pour que sa distance entre le canal d'aspiration (18) et le canal de refoulement (19) soit variable.
  2. Pompe à engrenage intérieur selon la revendication 1,
    caractérisée en ce que
    le canal d'aspiration (18) est formé par un dégagement allongé dans la direction périphérique de la plaque d'étanchéité (13) et la plaque d'étanchéité (13) peut tourner par rapport au boîtier de pompe (1) entre deux positions.
  3. Pompe à engrenage intérieur selon la revendication 1,
    caractérisée en ce que
    la plaque d'étanchéité (13) est précontrainte dans la direction axiale par un ressort (14) couplé au boîtier de pompe (1) et à la plaque d'étanchéité (13).
  4. Pompe à engrenage intérieur selon la revendication 3,
    caractérisée en ce que
    le ressort (14) est précontraint dans la direction périphérique dans le sens opposé au sens d'entraînement de la pompe à pignon denté intérieur.
  5. Pompe à engrenage intérieur selon les revendications 3 ou 4,
    caractérisée en ce que
    le ressort (14) comporte deux branches courbes (15, 16) reliées par l'une de leurs extrémités et couplées à la plaque d'étanchéité (13), l'autre extrémité étant couplée au boîtier de pompe (1).
  6. Pompe à engrenage intérieur selon l'une des revendications 3 à 5,
    caractérisée en ce que
    du côté de la face de la plaque d'étanchéité (13) non tourné vers la couronne dentée (5) et le pignon (3), à une certaine distance, une broche (28) est guidée en coulissement axial, cette broche coopérant avec un autre ressort (29) pour s'opposer à un mouvement de la plaque d'étanchéité (13) dans la direction axiale.
  7. Pompe à engrenage intérieur selon l'une des revendications précédentes,
    caractérisée en ce que
    le canal d'aspiration (18) est relié à une arrivée de carburant (36) dont l'axe longitudinal coïncide avec l'axe longitudinal de l'arbre d'entraînement (2).
  8. Pompe à engrenage intérieur selon la revendication 7,
    caractérisée en ce que
    l'alimentation en carburant (36) débouche dans un manchon (30) logeant l'autre ressort (29) et ce manchon comporte des perçages radiaux (31, 32) pour le passage du carburant.
  9. Pompe à engrenage intérieur selon l'une des revendications précédentes,
    caractérisée par
    une soupape de dérivation (22) prévue dans le boîtier de pompe, et reliée par un premier perçage axial (21) au canal d'aspiration (18) et par un second perçage axial (20), au canal de refoulement (19).
EP01960144A 2000-08-19 2001-08-03 Pompe a engrenages a denture interieure Expired - Lifetime EP1311762B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10040692A DE10040692C1 (de) 2000-08-19 2000-08-19 Innenzahnradpumpe
DE10040692 2000-08-19
PCT/DE2001/002965 WO2002016772A1 (fr) 2000-08-19 2001-08-03 Pompe a engrenages a denture interieure

Publications (2)

Publication Number Publication Date
EP1311762A1 EP1311762A1 (fr) 2003-05-21
EP1311762B1 true EP1311762B1 (fr) 2006-09-20

Family

ID=7653068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01960144A Expired - Lifetime EP1311762B1 (fr) 2000-08-19 2001-08-03 Pompe a engrenages a denture interieure

Country Status (6)

Country Link
US (1) US6764283B2 (fr)
EP (1) EP1311762B1 (fr)
JP (1) JP2004507640A (fr)
CZ (1) CZ299441B6 (fr)
DE (2) DE10040692C1 (fr)
WO (1) WO2002016772A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106795878A (zh) * 2014-08-25 2017-05-31 开利公司 具有双减压的齿轮泵

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10058012A1 (de) * 2000-11-23 2002-05-29 Bosch Gmbh Robert Zahnradförderpumpe, insbesondere zum Fördern von Kraftstoff zu einer Kraftstoffhochdruckpumpe
US20080019846A1 (en) * 2006-03-31 2008-01-24 White Stephen L Variable displacement gerotor pump
JP4842341B2 (ja) * 2009-03-23 2011-12-21 日立オートモティブシステムズ株式会社 ギヤポンプ及びブレーキ装置用ギヤポンプ
DE102011075415A1 (de) * 2011-05-06 2012-11-08 Robert Bosch Gmbh Zahnpumpe

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2405061A (en) * 1942-12-02 1946-07-30 Eaton Mfg Co Pump structure
US3026809A (en) * 1956-04-06 1962-03-27 Borg Warner Internal-external gear pump
US3515496A (en) * 1968-05-06 1970-06-02 Reliance Electric Co Variable capacity positive displacement pump
DE2650908A1 (de) * 1976-11-06 1978-05-11 Bosch Gmbh Robert Innenzahnradmaschine (pumpe oder motor)
US4492539A (en) * 1981-04-02 1985-01-08 Specht Victor J Variable displacement gerotor pump
DE3827573A1 (de) * 1988-08-13 1990-02-15 Bosch Gmbh Robert Vorrichtung zum foerdern von kraftstoff aus einem vorratstank zur brennkraftmaschine, insbesondere eines kraftfahrzeuges
DE4142799C1 (fr) * 1991-12-26 1993-04-15 J.M. Voith Gmbh, 7920 Heidenheim, De
CA2219062C (fr) * 1996-12-04 2001-12-25 Siegfried A. Eisenmann Pompe a engrenages a couronne infiniment variable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106795878A (zh) * 2014-08-25 2017-05-31 开利公司 具有双减压的齿轮泵
CN106795878B (zh) * 2014-08-25 2019-04-09 开利公司 具有双减压的齿轮泵

Also Published As

Publication number Publication date
JP2004507640A (ja) 2004-03-11
WO2002016772A1 (fr) 2002-02-28
CZ20021352A3 (cs) 2002-10-16
US20030026711A1 (en) 2003-02-06
US6764283B2 (en) 2004-07-20
DE10040692C1 (de) 2001-09-20
EP1311762A1 (fr) 2003-05-21
CZ299441B6 (cs) 2008-07-30
DE50111053D1 (de) 2006-11-02

Similar Documents

Publication Publication Date Title
EP0517014B1 (fr) Pompe à engrenages pour huile de lubrification d'un moteur à combustion interne, en particulier pour véhicules
EP1305523B1 (fr) Pompe a engrenages interieurs
EP1927754A1 (fr) Pompe à engrenages intérieurs
EP1760315A2 (fr) Pompe à engrenage interne avec pièce intermédiaire
EP1438507B1 (fr) Pompe a engrenages interieurs
EP0666422B1 (fr) Paliers et système d'entraînement pour les rotors d'un compresseur à vis
WO2018077778A1 (fr) Pompe à piston rotatif munie d'une garniture d'étanchéité à chambre de barrage
WO2016173800A1 (fr) Dispositif pompe
EP1311762B1 (fr) Pompe a engrenages a denture interieure
DE19513822C2 (de) Einrichtung zum Fördern von Kraftstoff aus einem Vorratstank zu einer Brennkraftmaschine eines Kraftfahrzeuges
DE10337847A1 (de) Pumpenanordnung mit einer Hochdruckpumpe und einer dieser vorgeschalteten Niederdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
EP0405118A1 (fr) Pompe rotative à carburant
EP0846861B1 (fr) Pompe annulaire à engrenages continuellement variable
DE19913774A1 (de) Kraftstofffördereinheit
DE102008034391A1 (de) Hydraulikantrieb mit zentraler Axialspielkompensation
WO1992008051A1 (fr) Pompe a pistons, notamment pompe a pistons radiaux
DE3624382C2 (fr)
DE10254840A1 (de) Pumpenanordnung mit einer Hochdruckpumpe und einer dieser vorgeschalteten Niederdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
EP1026401B1 (fr) Pompe hydrostatique
EP1658438B1 (fr) Pompe a liquides
DE2911655A1 (de) Rollkolbenpumpe
DE2650908A1 (de) Innenzahnradmaschine (pumpe oder motor)
DE2744591A1 (de) Pumpe
DE3922434C2 (fr)
EP0843096B1 (fr) Dispositif de couplage pour coupler une pompe à vide à une pompe à carburant dans un carter commun

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030319

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: F04C 14/00 20060101AFI20060328BHEP

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060920

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50111053

Country of ref document: DE

Date of ref document: 20061102

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20070109

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070621

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20100825

Year of fee payment: 10

Ref country code: FR

Payment date: 20100901

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20100823

Year of fee payment: 10

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20110803

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20120430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110803

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110803

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110831

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20191021

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50111053

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210302