EP2052157A1 - Pompe à engrenage intérieur - Google Patents

Pompe à engrenage intérieur

Info

Publication number
EP2052157A1
EP2052157A1 EP07787102A EP07787102A EP2052157A1 EP 2052157 A1 EP2052157 A1 EP 2052157A1 EP 07787102 A EP07787102 A EP 07787102A EP 07787102 A EP07787102 A EP 07787102A EP 2052157 A1 EP2052157 A1 EP 2052157A1
Authority
EP
European Patent Office
Prior art keywords
housing
toothed ring
internal gear
gear pump
ring
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.)
Withdrawn
Application number
EP07787102A
Other languages
German (de)
English (en)
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 EP2052157A1 publication Critical patent/EP2052157A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008—Prime movers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • 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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/086—Carter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures

Definitions

  • the present invention relates to an internal gear pump for conveying a fluid, preferably fuel in an internal combustion engine, according to the preamble of claim 1.
  • Internal gear pumps for conveying fluids are known from the prior art and have a wide distribution. Internal gear pumps of the kind of interest here can be used for conveying fluids, with pumps of this type being suitable for providing high pressures.
  • An internal gear pump is also preferably used in a low-pressure circuit system for supplying fuel to an internal combustion engine, which is connected to a rotating shaft, to enable the gear pair consisting of the toothed ring and the pinion in a rotational movement.
  • the internal gear pump disclosed herein is suitable for delivering fuel to an internal combustion engine and includes an internally toothed ring gear and an externally toothed pinion gear cooperating with the ring gear to produce a pumping action.
  • the toothed ring and the pinion are integrated in a housing which has at least one suction connection and one pressure connection in order to supply or remove the delivery fluid.
  • the toothed ring is driven by a drive shaft, wherein the drive shaft is connected via an Oldham coupling to this and the rotational movement is driven either by an electric motor or by the internal combustion engine itself by means of the output.
  • the invention includes the technical teaching that an electrically commutated stator is arranged in the housing, which extends concentrically around the toothed ring and cooperates in the manner of an electric motor with a magnetic ring which concentrically surrounds the toothed ring and is rotationally connected thereto, wherein the Magnetic ring with the toothed ring for generating the conveying effect
  • the invention is based on the idea to connect the internal gear pump to create an integral unit with an electric motor. Due to the created according to the principle of the integrated electric motor drive the toothed ring and the Pinion eliminates a supplied from the outside into the housing of the internal gear pump drive shaft. Due to the non-existing drive shaft also eliminates the problem of sealing the rotating shaft in the housing of the internal gear pump.
  • the housing itself has only electrical connections for the electrically or electronically commutatable stator and corresponding fluid connections for the supply or for the delivery of the delivery fluid.
  • the electrically or electronically commutatable stator can be generated by a corresponding control a rotating magnetic field, which sets the magnetic ring in a rotational movement, which may consist of a segmented or formed of a plurality of magnetic segments ring.
  • a usable torque is generated in the magnetic ring, wherein the magnetic ring is rotationally connected to the toothed ring in connection.
  • the toothed ring can be driven by the magnetic ring, so that due to the introduced rotational movement in the toothed ring and the pinion driven therewith, the required pumping action of the internal gear pump can be generated.
  • the magnetic ring is rotatably received in the manner of a sliding bearing in the stator.
  • the magnetic ring is cast in the toothed ring, wherein the toothed ring is rotatably received in the manner of a sliding bearing in the stator.
  • the rotating system of the magnetic ring and the toothed ring can be received within the stator in the housing in the manner of a plain bearing.
  • the corresponding accuracies, i. the required clearance of the journal bearing thus formed be sized so that a high efficiency of the internal gear pump can be achieved by a small clearance. If necessary, the
  • the toothed ring consists of an injection-molded plastic material, so that the magnetic ring itself is injected in the toothed ring or this is overmolded.
  • the toothed ring itself can also be injected inside the magnetic ring.
  • Connection can also be designed as a releasable connection.
  • a releasable connection it is generally advantageous that the radial distance between the magnetic ring and the stator is minimized.
  • the housing of the internal gear pump is designed such that extends between the stator and the magnetic ring in the radial direction a circumferential housing portion, so that the rotating system of magnetic ring and ring gear is mounted in the housing itself.
  • a further embodiment of the present invention provides that the bearing journal is formed integrally with the housing, and the bearing journal and the housing are made of an injection-moldable material comprising a plastic.
  • the housing may for example consist of a polycarbonate (PC), polypropylene (PP), polyamide
  • PA polyethylene terephthalate
  • PBT polybutadiene terephthalate
  • POM polymethacrylate
  • These materials are injection-moldable, so that the inner contour of the housing already forms the final contour in the casting process, and the stator and the pinion and the toothed ring can be inserted into the housing. It is also possible to form the housing from a machined component, with higher accuracies can be achieved. A combination of an injection-molded housing and correspondingly machined functional surfaces can also be provided.
  • connection cover can be introduced, and the housing-open side is closed by means of a connection cover. This results in the advantage that the components of the internal gear pump can be inserted from a mounting direction in the housing.
  • a connection cover is screwed onto the housing, so that all components such as the electrically commutated
  • Electric motor comprising the stator and the magnetic ring, and the components of the internal gear pump, comprising the toothed ring and the pinion, are arranged integrated in the housing.
  • a sealing element is arranged between the housing and the connection cover, which seals the filled with the conveying fluid inside of the housing against this statically.
  • no further dynamic sealing of moving components such as a rotating shaft is required.
  • the sealing element can be designed as a simple O-ring seal or as a flat sealing ring, which is arranged between the connection cover and the housing. Therefore, the internal gear pump according to the present invention is also particularly suitable for aggressive media, since expensive sealing systems are eliminated.
  • connection cover at least one suction connection and at least one
  • Pressure port has to supply or remove the conveying fluid.
  • the connections for the suction port and the pressure port are adjacent to so-called inlet kidneys or drainage kidneys, which are arranged crescent-shaped adjacent to the gear pair of the toothed ring and the pinion.
  • the connections for the pressure connection and the suction connection are located approximately 180 ° apart from each other, and are integrated in the connection cover itself.
  • a further advantageous embodiment of the present invention provides that the stator comprises at least one electric winding, which is brought into operative connection with an electrical control for electrical commutation in order to produce a rotational movement of the magnetic ring and thus of the toothed ring.
  • the control By means of the control, the speed of the magnetic ring and the toothed ring and the torque can be determined. Depending on the required delivery pressure, a correspondingly high torque can be generated, whereas, on the other hand, with a high delivery rate, the rotational speed can be adjusted.
  • the conveying fluid comprises a fuel for an internal combustion engine
  • the internal gear pump is integrated in a low-pressure circuit system to convey the fuel from a fuel tank to a metering unit.
  • the known in these low-pressure circuit systems feed pump is thus designed as an internal gear pump, and sucks the fuel from a tank through a filter and promotes this to a metering unit.
  • pressures of for example 5 to 10 bar are required, so that the internal gear pump can be designed depending on the delivery rate with a delivery rate of, for example, 50 to 100 watts.
  • the inlet and outlet kidneys or the pressure connection and / or the suction connection can also be provided in the housing, and are not limited to an arrangement in the connection cover.
  • Figure 1 shows a first axial section of an internal gear pump with an integrated
  • FIG. 2 shows a further view of a cross section through the internal gear pump according to FIG. 1.
  • the internal gear pump 1 shown in Figure 1 comprises a pair of gears consisting of an internally toothed ring gear 10 and an externally toothed pinion 11.
  • the pinion 11 is arranged eccentrically to the toothed ring 10 on a bearing journal 12 and rotatably received on this. If now the toothed ring 10 is set in rotary motion, then the external toothing of the pinion 11 meshes with the internal toothing of the toothed ring 10 and generates a delivery volume flow of the fluid in which the toothing is running.
  • the toothing of the toothed ring 10 and the pinion 11 is arranged in a housing 13, wherein in accordance with the present embodiment of the bearing pin 12 in one piece, that is formed of the same material with the housing 13.
  • the housing 13 and the bearing pin 12 are made of an injection-moldable plastic material, wherein the housing has a housing-open side for mounting the components of the internal gear pump 1.
  • the toothed ring 10 is rotationally connected to a magnetic ring 15, wherein the magnetic ring 15 extends radially around the toothed ring 10.
  • the toothed ring 10 may be injected into the magnetic ring 15 by means of an injection molding process.
  • the magnetic ring 15 runs in an inner side of a stator 14, which has a
  • Electric winding 20 has. If the electric winding is electrically commutated by a controller, a circulating magnetic field is generated in the stator 14. Due to the rotating magnetic field of the magnetic ring 15 is set in rotation, wherein due to the rotationally fixed connection of the magnetic ring 15 with the toothed ring 10, the toothing, consisting of the toothed ring 10 and the pinion 11 is put into operation.
  • the magnetic ring 15 and the toothed ring 10 cast with it are slidably mounted in the inside of the stator 14, wherein the stator 14 is inserted into a corresponding receptacle in the housing 13 of the internal gear pump 1.
  • the housing-open side of the housing 13 of the internal gear pump 1 is by means of a
  • connection cover 16 is closed, wherein for fluid-tight sealing of the gap between the connection cover 16 and the housing 13, a sealing element 17 is provided.
  • the sealing element 17 is designed as an O-ring, and is integrated in a corresponding circumferential groove within the connection cover 16.
  • the internal gear pump 1 has only a single sealing element 17 in order to seal the entire unit against the conveying fluid.
  • the sealing element 17 is designed as a simple static seal, so that further dynamic seals, for example, for sealing rotating shafts for driving the toothed ring 10 omitted.
  • the terminal cover 16 may be made of a plastic material, and further serves as an axial guide of the toothed ring 10 and the pinion 11th
  • Figure 2 shows a further cross-sectional view of the internal gear pump 1, in which a suction port 18 and a pressure port 19 are shown. These are arranged offset by about 180 ° to each other, and open into a Zulaufniere or a drain kidney. These are laterally provided on the toothing, consisting of the toothed ring 10 and the pinion 11, and on the one hand form a suction side and on the other hand a pressure side of the conveying fluid.
  • the suction port 18 and the pressure port 19 are integrated in the connection cap 16 itself, so that these fluid ports can be brought into communication with a piping or a hose connection by means of an internal thread or a corresponding connection pin. Furthermore, it can be seen in FIG.
  • the bearing journal 12 is arranged eccentrically to the axis of rotation of the toothed ring 10, so that the pinion 11 meshes with the internal toothing of the toothed ring 10 on one side.
  • the housing 13 receiving holes, which are provided according to the present square design of the housing in the respective corners.
  • the invention is not limited in its execution to the above-mentioned preferred embodiment. Rather, a number of variants are conceivable, which of the illustrated solution even with fundamentally different

Landscapes

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

Abstract

Pompe à engrenage intérieur (1) pour refouler un fluide, de préférence du carburant dans un moteur à combustion interne, avec une couronne (10) à denture intérieure et un pignon (11) à denture extérieure qui engrène dans la couronne (10) afin de produire un effet de refoulement. Le pignon (11) est monté à rotation excentriquement par rapport à la couronne (10) sur un pivot (12), et l'ensemble de la couronne et du pignon (11) est reçu dans un boîtier (13). Un stator (14) électriquement commutable est disposé dans le boîtier (13) ; il s'étend concentriquement tout autour de la couronne (10) et coopère à la manière d'un moteur électrique avec un aimant annulaire (15) qui entoure concentriquement la couronne (10) et lui est lié en rotation. L'aimant annulaire (15) accomplit avec la couronne (10) un mouvement de rotation afin de produire l'effet de refoulement.
EP07787102A 2006-08-09 2007-07-05 Pompe à engrenage intérieur Withdrawn EP2052157A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610037177 DE102006037177A1 (de) 2006-08-09 2006-08-09 Innenzahnradpumpe
PCT/EP2007/056811 WO2008017543A1 (fr) 2006-08-09 2007-07-05 Pompe à engrenage intérieur

Publications (1)

Publication Number Publication Date
EP2052157A1 true EP2052157A1 (fr) 2009-04-29

Family

ID=38657746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07787102A Withdrawn EP2052157A1 (fr) 2006-08-09 2007-07-05 Pompe à engrenage intérieur

Country Status (3)

Country Link
EP (1) EP2052157A1 (fr)
DE (1) DE102006037177A1 (fr)
WO (1) WO2008017543A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112009001565A5 (de) * 2008-07-16 2011-03-31 Schaeffler Technologies Gmbh & Co. Kg Verdrängermaschine
DE102009000796A1 (de) * 2009-02-12 2010-08-19 Robert Bosch Gmbh Kraftstoffpumpe
DE102009028154A1 (de) 2009-07-31 2011-02-03 Robert Bosch Gmbh Zahnradpumpe
DE102010001122A1 (de) 2010-01-22 2011-07-28 Robert Bosch GmbH, 70469 Pumpenanordnung und Innenzahnradpumpe
DE102010031609A1 (de) 2010-07-21 2012-01-26 Robert Bosch Gmbh Pumpe
DE102010041244A1 (de) * 2010-09-23 2012-03-29 Robert Bosch Gmbh Pumpe mit Elektromotor
US8840385B2 (en) * 2011-03-03 2014-09-23 Ti Group Automotive Systems, L.L.C. Positive displacement fluid pump
DE102011007773A1 (de) 2011-04-20 2012-10-25 Robert Bosch Gmbh Kraftstoffeinspritzsystem und Tankeinbaueinheit für ein Kraftstoffeinspritzsystem
DE102011051228A1 (de) * 2011-06-21 2012-12-27 BAM Bundesanstalt für Materialforschung und -prüfung Komponente für Verbrennungsmotoren zum Betrieb mit Peroxy-Kraftstoffen
CN104136779B (zh) 2012-02-27 2016-10-26 麦格纳动力系巴德霍姆堡有限责任公司 泵装置
WO2016124295A1 (fr) * 2015-02-06 2016-08-11 Robert Bosch Gmbh Unité de pompe permettant d'alimenter en carburant, de préférence du carburant diesel, un moteur à combustion interne
DE102019102744A1 (de) * 2019-02-04 2020-08-06 Schwäbische Hüttenwerke Automotive GmbH Zahnradpumpe
KR20220045754A (ko) * 2020-10-06 2022-04-13 엘지이노텍 주식회사 전동 펌프
DE102022208139A1 (de) 2022-08-04 2024-02-15 Vitesco Technologies GmbH Pumpe, insbesondere Getriebeölpumpe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29913367U1 (de) * 1999-07-30 1999-12-09 Pumpenfabrik Ernst Scherzinger GmbH & Co. KG, 78120 Furtwangen Innen-Zahnradpumpe, deren Hohlrad das Innere eines Rotors eines Elektromotors ist

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
IT1245466B (it) * 1991-03-19 1994-09-20 Iveco Fiat Elettropompa per la circolazione di un liquido, ad esempio in un motore a combustione interna
DE10150653A1 (de) * 2001-10-13 2003-04-30 Bosch Gmbh Robert Innenzahnradpumpe
JP4272112B2 (ja) * 2004-05-26 2009-06-03 株式会社日立製作所 モータ一体型内接歯車式ポンプ及び電子機器
US20060039815A1 (en) * 2004-08-18 2006-02-23 Allan Chertok Fluid displacement pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29913367U1 (de) * 1999-07-30 1999-12-09 Pumpenfabrik Ernst Scherzinger GmbH & Co. KG, 78120 Furtwangen Innen-Zahnradpumpe, deren Hohlrad das Innere eines Rotors eines Elektromotors ist

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2008017543A1 *

Also Published As

Publication number Publication date
WO2008017543A1 (fr) 2008-02-14
DE102006037177A1 (de) 2008-02-14

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