EP1111735A2 - Wet DC motor - Google Patents

Wet DC motor Download PDF

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Publication number
EP1111735A2
EP1111735A2 EP00120623A EP00120623A EP1111735A2 EP 1111735 A2 EP1111735 A2 EP 1111735A2 EP 00120623 A EP00120623 A EP 00120623A EP 00120623 A EP00120623 A EP 00120623A EP 1111735 A2 EP1111735 A2 EP 1111735A2
Authority
EP
European Patent Office
Prior art keywords
commutator
brush
running surface
motor
motor 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.)
Withdrawn
Application number
EP00120623A
Other languages
German (de)
French (fr)
Other versions
EP1111735A3 (en
Inventor
Frank Schwabbauer
Ronald Rathke
Reinhard Thienelt
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.)
Pierburg GmbH
Original Assignee
Pierburg 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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP1111735A2 publication Critical patent/EP1111735A2/en
Publication of EP1111735A3 publication Critical patent/EP1111735A3/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/26—Solid sliding contacts, e.g. carbon brush
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/04—Commutators
    • H01R39/045—Commutators the commutators being made of carbon

Definitions

  • the invention relates to a wet-running DC motor for fuel pumps according to the Preamble of claim 1.
  • Such fuel pumps are required for internal combustion engines in vehicles be used.
  • Fig. 1 shows a cross section through a wet-running DC motor 1 for a fuel pump for internal combustion engines, with a commutator 2 and carbon brushes 3.
  • the carbon brushes 3 are each loaded by a spring 4 against the commutator 2.
  • the DC motor 1 and a pump, not shown, are in one, not shown Housing arranged and flowed through by fuel.
  • the commutator 2 is formed from carbon lamellae 5 and the carbon brushes 3 have a brush running surface 6 corrugated in the direction of rotation.
  • the brush running surface 6 has a radial center offset 8 directed against the direction of rotation (arrow) (FIG. 3), as a result of which the carbon brush 3 can lie against the commutator 2 with a full surface 6 within a carbon guide 9 despite an inclined position.
  • the corrugation of the brush running surface 6 is achieved by ribs 10 arranged in parallel (FIG. 2), which have a triangular cross-sectional surface 11 (FIG. 4), the triangular tip 12 of which ends in the region of the brush running surface 6.
  • a special embodiment provides that the ribs 10 a distance 13 from each other about 0.5 mm and have a tip height 11 of about 0.2 mm, the radius center offset 8 is about 0.5 mm.

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  • Motor Or Generator Current Collectors (AREA)
  • Dc Machiner (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

A commutator (2) is made from carbons bars (5). Carbon brushes (3) have a brush running surface (6) corrugated in the direction of their rotation. The brush running surface has a radius mismatch. The carbon brushes are loaded against the commutator by springs (4).

Description

Die Erfindung betrifft einen naßlaufenden Gleichstrommotor für Brennstoffpumpen nach dem Oberbegriff des Anspruchs 1.The invention relates to a wet-running DC motor for fuel pumps according to the Preamble of claim 1.

Derartige Brennstoffpumpen werden für Brennkraftmaschinen benötigt, die in Fahrzeuge eingesetzt werden.Such fuel pumps are required for internal combustion engines in vehicles be used.

Es ist bekannt (DE 25 31 483 A1), daß bei diesen Brennstoffpumpen ein hoher Bürstenverschleiß auftreten kann, der durch Verwirbelung, Bildung eines Flüssigkeitskeiles oder Kavitation zwischen Bürste und Kommutator verursacht wird.It is known (DE 25 31 483 A1) that these fuel pumps are subject to high brush wear can occur due to turbulence, the formation of a liquid wedge or cavitation between the brush and the commutator.

Es ist daher bereits vorgeschlagen worden, die Kommutatorlauffläche mit einer gewissen Oberflächenrauhigkeit auszubilden, so daß der direkte Kontakt zwischen Bürsten und Kommutator erhalten bleibt.It has therefore already been proposed to change the commutator tread with a certain Form surface roughness so that the direct contact between brushes and commutator preserved.

Es hat sich nun aber gezeigt, daß diese so ausgebildeten Brennstoffpumpen für Dieselförderung, insbesondere für Biodieselförderung nicht geeignet sind, da sie die Lebensdauerforderungen der Fahrzeughersteller nicht erfüllen.However, it has now been shown that these fuel pumps designed for diesel delivery, are particularly unsuitable for biodiesel production, as they affect the lifespan requirements the vehicle manufacturer does not meet.

Es ist daher Aufgabe der Erfindung, Maßnahmen aufzufinden, mit denen ein gattungsgemäßer naßlaufender Gleichstrommotor für den Einsatz für eine Dieselbrennstoffpumpe geeignet wird.It is therefore an object of the invention to find measures with which a generic wet-running DC motor suitable for use with a diesel fuel pump becomes.

Diese Aufgabe ist durch die im Kennzeichen des Anspruches 1 angegebenen Merkmale gelöst, vorteilhafte Weiterbildungen sind mit den Merkmalen der Unteransprüche angegeben.This object is achieved by the features specified in the characterizing part of claim 1 solved, advantageous developments are specified with the features of the subclaims.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben. An embodiment of the invention is shown in the drawing and is below described.

Diese zeigt:

  • Fig. 1
    einen Querschnitt eines Gleichstrommotors,
  • Fig. 2
    eine Draufsicht und
  • Fig. 3 und 4
    Seitenansichten einer Kohlebürste.
    • This shows:
  • Fig. 1
    a cross section of a DC motor,
  • Fig. 2
    a top view and
  • 3 and 4
    Side views of a carbon brush.

    • Fig. 1 zeigt einen Querschnitt durch einen naßlaufenden Gleichstrommotor 1 für eine Brennstoffpumpe für Brennkraftmaschinen, mit einem Kommutator 2 und Kohlebürsten 3.Fig. 1 shows a cross section through a wet-running DC motor 1 for a fuel pump for internal combustion engines, with a commutator 2 and carbon brushes 3.

    Die Kohlebürsten 3 sind durch jeweils eine Feder 4 gegen den Kommutator 2 belastet. Der Gleichstrommotor 1 sowie eine nicht dargestellte Pumpe sind in einem nicht dargestellten Gehäuse angeordnet und von Brennstoff durchflossen.The carbon brushes 3 are each loaded by a spring 4 against the commutator 2. The DC motor 1 and a pump, not shown, are in one, not shown Housing arranged and flowed through by fuel.

    Erfindungsgemäß ist nun vorgesehen, daß der Kommutator 2 aus Kohlelamellen 5 gebildet ist und die Kohlebürsten 3 eine in Drehrichtung geriffelte Bürstenlauffläche 6 aufweisen.According to the invention, it is now provided that the commutator 2 is formed from carbon lamellae 5 and the carbon brushes 3 have a brush running surface 6 corrugated in the direction of rotation.

    Durch diese Maßnahmen liegt eine sehr günstige Werkstoffpaarung Graphit - Graphit vor, durch die Riffelung 7 der Bürstenlauffläche 6 wird der spezifische Bürstendruck sehr hoch. Damit werden ein Aufschwimmen der Bürsten 3 verhindert und eine optimale Stromübertragung erreicht. Die in Drehrichtung (Pfeil) angeordnete Riffelung 7 bewirkt eine Schmierung zwischen den kontaktierenden Flächen des Kommutators 2 und der Kohlebürsten 3, wodurch ggf. auftretendes Bürstenfeuer gelöscht wird.These measures result in a very favorable combination of graphite and graphite, the specific brush pressure is very high due to the corrugation 7 of the brush running surface 6. This prevents the brushes 3 from floating and ensures optimal power transmission reached. The corrugation 7 arranged in the direction of rotation (arrow) causes lubrication between the contacting surfaces of the commutator 2 and the carbon brushes 3, whereby any brush fire that may occur is extinguished.

    Es ist besonders vorteilhaft, wenn die Bürstenlauffläche 6 einen gegen die Drehrichtung (Pfeil) gerichteten Radienmittenversatz 8 aufweist (Fig. 3), wodurch die Kohlebürste 3 trotz Schiefstellung innerhalb einer Kohleführung 9 mit voller Fläche 6 gegen den Kommutator 2 anliegen kann.
    Die Riffelung der Bürstenlauffläche 6 ist durch parallel angeordnete Rippen 10 erreicht (Fig. 2), die eine dreieckige Querschnittsfläche 11 (Fig. 4) aufweisen, deren Dreieckspitze 12 im Bereich der Bürstenlauffläche 6 endet.     It is particularly advantageous if the brush running surface 6 has a radial center offset 8 directed against the direction of rotation (arrow) (FIG. 3), as a result of which the carbon brush 3 can lie against the commutator 2 with a full surface 6 within a carbon guide 9 despite an inclined position.
    The corrugation of the brush running surface 6 is achieved by ribs 10 arranged in parallel (FIG. 2), which have a triangular cross-sectional surface 11 (FIG. 4), the triangular tip 12 of which ends in the region of the brush running surface 6.

    Eine besondere Ausführung sieht vor, daß die Rippen 10 einen Abstand 13 zueinander von etwa 0,5 mm und eine Spitzenhöhe 11 von etwa 0,2 mm aufweisen, wobei der Radienmittenversatz 8 etwa 0,5 mm beträgt.A special embodiment provides that the ribs 10 a distance 13 from each other about 0.5 mm and have a tip height 11 of about 0.2 mm, the radius center offset 8 is about 0.5 mm.

    Claims (5)

    Naßlaufender Gleichstrommotor für eine Brennstoffpumpe für Brennkraftmaschinen, mit einem Kommutator und Kohlebürsten, dadurch gekennzeichnet, daß der Kommutator (2) aus Kohlelamellen (5) gebildet ist und die Kohlebürsten (3) eine in Drehrichtung geriffelte Bürstenlauffläche (6) aufweisen.Wet-running DC motor for a fuel pump for internal combustion engines, with a commutator and carbon brushes, characterized in that the commutator (2) is formed from carbon lamellae (5) and the carbon brushes (3) have a brushed tread (6) corrugated in the direction of rotation. Gleichstrommotor nach Anspruch 1, dadurch gekennzeichnet, daß die Bürstenlauffläche (6) einen gegen die Drehrichtung gerichteten Radienmittenversatz (8) aufweist.DC motor according to Claim 1, characterized in that the brush running surface (6) has a radial center offset (8) directed against the direction of rotation. Gleichstrommotor nach Anspruch 2, dadurch gekennzeichnet, daß die Riffelung (7) der Bürstenlauffläche (6) durch parallel angeordnete Rippen (10) erreicht ist, die eine dreieckige Querschnittsfläche (11) aufweisen, deren Dreieckspitze (12) im Bereich der Bürstenlauffläche (6) endet.DC motor according to Claim 2, characterized in that the corrugation (7) of the brush running surface (6) is achieved by parallel ribs (10) which have a triangular cross-sectional area (11), the triangular tip (12) of which in the region of the brush running surface (6) ends. Gleichstrommotor nach Anspruch 3, dadurch gekennzeichnet, daß die Rippen (10) einen Abstand (13) zueinander von etwa 0,5 mm und eine Spitzenhöhe (11) von etwa 0,2 mm aufweisen.DC motor according to Claim 3, characterized in that the ribs (10) have a spacing (13) from one another of approximately 0.5 mm and a tip height (11) of approximately 0.2 mm. Gleichstrommotor nach Anspruch 2, 3 oder 4, dadurch gekennzeichnet, daß der Radienmittenversatz (8) etwa 0,5 mm beträgt.DC motor according to Claim 2, 3 or 4, characterized in that the radius center offset (8) is approximately 0.5 mm.
    EP00120623A 1999-12-23 2000-09-21 Wet DC motor Withdrawn EP1111735A3 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19962363A DE19962363A1 (en) 1999-12-23 1999-12-23 Wet running DC motor
    DE19962363 1999-12-23

    Publications (2)

    Publication Number Publication Date
    EP1111735A2 true EP1111735A2 (en) 2001-06-27
    EP1111735A3 EP1111735A3 (en) 2002-11-27

    Family

    ID=7934057

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00120623A Withdrawn EP1111735A3 (en) 1999-12-23 2000-09-21 Wet DC motor

    Country Status (3)

    Country Link
    US (1) US6552466B2 (en)
    EP (1) EP1111735A3 (en)
    DE (1) DE19962363A1 (en)

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2004093296A1 (en) 2003-04-16 2004-10-28 Siemens Aktiengesellschaft Fuel pump comprising an electric motor
    CN106486874A (en) * 2015-11-30 2017-03-08 衡阳双雁运输机械有限公司 A kind of engine commutator for vibrator

    Families Citing this family (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JP3511513B2 (en) * 2001-05-10 2004-03-29 三菱電機株式会社 Brush equipment
    GB2389967A (en) * 2002-06-18 2003-12-24 Johnson Electric Sa Wet-running commutator with grooved surface for fuel pump
    DE10356080A1 (en) * 2003-12-01 2005-06-23 Siemens Ag Fuel pump
    WO2006049642A2 (en) * 2004-03-30 2006-05-11 Trico Products Corporation Electric motor having convex high-speed brush
    JP6249148B2 (en) * 2012-11-29 2017-12-20 ミネベアミツミ株式会社 DC motor with brush
    DE102013217077A1 (en) * 2013-08-27 2015-03-05 Robert Bosch Gmbh Brush device for an electric machine and electric machine
    CN205583897U (en) * 2016-03-07 2016-09-14 德昌电机(深圳)有限公司 Brush device , motor and liquid pump

    Citations (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2206366A (en) * 1937-10-22 1940-07-02 Albert G Redmond Brush assembly for dynamoelectric machines
    DE2531483A1 (en) * 1975-07-15 1977-01-20 Pierburg Autogeraetebau Kg FUEL PUMP
    DE19533031A1 (en) * 1995-01-03 1996-07-04 Teves Gmbh Alfred Carbon brush design for electric motor
    DE29802144U1 (en) * 1998-02-09 1998-04-02 Carbone Ag Carbon brush for electric fuel pumps
    US5808394A (en) * 1993-09-03 1998-09-15 Itt Automotive Europe Gmbh Carbon brush for an electric motor

    Family Cites Families (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3590300A (en) * 1969-09-22 1971-06-29 Westinghouse Electric Corp Commutating brush having improved resistance and riding characteristics
    JPS57162952A (en) * 1981-04-01 1982-10-06 Mabuchi Motor Co Ltd Plate brush for miniature motor
    JP2599778B2 (en) * 1988-12-14 1997-04-16 三菱電機株式会社 DC machine
    JP3004809B2 (en) * 1992-05-25 2000-01-31 アスモ株式会社 DC machine
    WO1996041410A1 (en) * 1995-06-07 1996-12-19 Itt Automotive Electrical Systems, Inc. Reduced speed growth in windshield wiper motor
    US5932949A (en) * 1997-10-03 1999-08-03 Mccord Winn Textron Inc. Carbon commutator

    Patent Citations (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2206366A (en) * 1937-10-22 1940-07-02 Albert G Redmond Brush assembly for dynamoelectric machines
    DE2531483A1 (en) * 1975-07-15 1977-01-20 Pierburg Autogeraetebau Kg FUEL PUMP
    US5808394A (en) * 1993-09-03 1998-09-15 Itt Automotive Europe Gmbh Carbon brush for an electric motor
    DE19533031A1 (en) * 1995-01-03 1996-07-04 Teves Gmbh Alfred Carbon brush design for electric motor
    DE29802144U1 (en) * 1998-02-09 1998-04-02 Carbone Ag Carbon brush for electric fuel pumps

    Cited By (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2004093296A1 (en) 2003-04-16 2004-10-28 Siemens Aktiengesellschaft Fuel pump comprising an electric motor
    CN100365918C (en) * 2003-04-16 2008-01-30 西门子公司 Fuel pump comprising an electric motor
    US7362029B2 (en) 2003-04-16 2008-04-22 Siemens Aktiengesellschaft Fuel pump comprising an electric motor
    CN106486874A (en) * 2015-11-30 2017-03-08 衡阳双雁运输机械有限公司 A kind of engine commutator for vibrator
    CN106486874B (en) * 2015-11-30 2019-01-08 衡阳双雁运输机械有限公司 A kind of engine commutator for vibration excitor

    Also Published As

    Publication number Publication date
    DE19962363A1 (en) 2001-06-28
    US20010006315A1 (en) 2001-07-05
    EP1111735A3 (en) 2002-11-27
    US6552466B2 (en) 2003-04-22

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