WO2009097935A1 - Pièce de moteur, procédé de protection anticorrosion et moteur électrique - Google Patents

Pièce de moteur, procédé de protection anticorrosion et moteur électrique Download PDF

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Publication number
WO2009097935A1
WO2009097935A1 PCT/EP2008/067290 EP2008067290W WO2009097935A1 WO 2009097935 A1 WO2009097935 A1 WO 2009097935A1 EP 2008067290 W EP2008067290 W EP 2008067290W WO 2009097935 A1 WO2009097935 A1 WO 2009097935A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor part
corrosion protection
motor
protection film
film
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.)
Ceased
Application number
PCT/EP2008/067290
Other languages
German (de)
English (en)
Inventor
Heiko Volz
Thomas Jaeger
Achim Neubauer
Werner Herm
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 WO2009097935A1 publication Critical patent/WO2009097935A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/44—Protection against moisture or chemical attack; Windings specially adapted for operation in liquid or gas
    • 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
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs

Definitions

  • the invention relates to a motor part according to the preamble of claim 1, a method for protecting a motor part against corrosion according to the preamble of claim 8 and an electric motor according to the preamble of claim 10.
  • the invention is therefore based on the object to propose a motor part, in which can be dispensed with a subsequent Verzern for corrosion protection reasons. Furthermore, the object is to propose a corrosion protection method and a correspondingly optimized electric motor.
  • the invention is based on the idea that the motor part, at least in sections, with a corrosion protection film, preferably a foil-like corrosion protection cover to provided, which is preferably arranged such that it reliably prevents the contact of at least one corrosion-prone element of the motor part with a, in particular aggressive, fluid.
  • a corrosion protection film in particular in place of the use of a chemical tinning, the processing time (production time) can be significantly shortened.
  • the use of a corrosion protection film results in a considerable cost savings on the one hand due to the shortening of the processing time and on the other hand due to the reduced material costs.
  • corrosion protection film offers the possibility of increasing the process reliability in comparison with the known tin-plating process.
  • electromotive losses as would occur with increased gaps between the rotor and stator can be safely prevented.
  • the motor part to be provided with a corrosion protection foil is a rotor of an electric motor, in particular designed as a commutator motor. It is preferred, at least the armature package of the rotor radially outside to completely encase with a corrosion protection foil. Additionally or alternatively, it is possible to encase free metal surfaces, in particular copper surfaces of a commutator of the rotor, with a corrosion protection film. For reasons of stability, it is preferable to have a rotor with a partially or fully molded anchor packet.
  • the stator of an electric motor can be protected against corrosion with the help of these at least partially sheathing anti-corrosion film. It is essential, regardless of whether the motor part is a rotor or a stator, that at least one element susceptible to corrosion, preferably all elements susceptible to corrosion, of the motor part are encased by the anticorrosive film, thus ensuring direct contact with an aggressive medium, For example, a fuel, especially a fuel with a high ethanol content, safe to prevent.
  • the anticorrosion film is arranged in such a way that it covers at least one outer metal surface of the motor part on the outside.
  • the anti-corrosion film covers all metal surfaces of the engine part, which would otherwise have direct contact with a, in particular aggressive fluid, preferably a liquid.
  • the anticorrosion film is advantageously arranged in a region which would have direct contact with a fluid without the anticorrosion film.
  • the anticorrosion film in order to prevent fluttering of the anticorrosion film during operation of the electric motor, is fixed to the motor part.
  • the anticorrosion film is designed as a heat-shrinkable tube, which is preferably shrunk onto the engine part by heat action and thus fixed.
  • the corrosion protection film it is possible to form the corrosion protection film as an adhesive film.
  • the anticorrosion film preferably has an adhesive layer facing the motor part. The adhesive layer is such that its adhesive effect is activated by the influence of heat. It is advantageous to attach the anticorrosive film so close to the motor part that fluid entry into a region between the anticorrosion film and the motor part, in particular a metal element, is reliably avoided.
  • the anticorrosion film is formed of plastic.
  • Particularly suitable for the formation of the corrosion protection film are polyethylene terephthalate or other chemical compounds with similar properties.
  • the invention provides a further development of the invention in an advantageous manner that the in particular flat anticorrosive film has a thickness, d. H. a material thickness of less than 150 ⁇ m. It is particularly preferred if the anticorrosion film has a thickness of less than 120 ⁇ m. Ideally, the corrosion protection film thickness is selected from a value range between approximately 50 ⁇ m and 100 ⁇ m.
  • the invention also leads to a corrosion protection method for protecting an engine part from corrosion or to a manufacturing method for a corrosion-protected engine part.
  • the core of the method is a motor part, in particular a rotor and / or stator of an electric motor, preferably after the completion of the actual functional nelle component with a corrosion protection foil (corrosion protection cover) to provide.
  • the anticorrosive film is preferably arranged at least in a region of the motor part which, when the electric motor is in operation, faces a fluid flowing through it.
  • the anticorrosion film in particular under the influence of heat, is glued and / or shrunk onto the motor part.
  • the anticorrosive film is preferably formed as the motor part, at least in sections, enveloping shrink film, preferably made of plastic, more preferably made of polyethylene terephthalate or a similar chemical compound.
  • the invention leads to an electric motor, in particular to an electric motor through which a fluid, preferably fuel, flows.
  • the electric motor is a drive motor of a fuel pump for a motor vehicle.
  • at least one motor part of the electric motor, in particular the rotor and / or the stator of the electric motor, at least in sections, preferably completely, provided with a corrosion protection film, are in particular sheathed / is, wherein the corrosion protection film, the motor part, in particular metallic elements protects the motor part from corrosion by the corrosion protection foil prevents direct contact of the engine part or a corrosion-prone element with an aggressive fluid, in particular a liquid, preferably fuel.
  • the corrosion protection foil preferably has direct fluid contact in the case of a completed, properly used electric motor and is arranged between a gap through which fluid flows and the motor part to be protected, directly on the motor part.
  • FIG. 1 shows a rotor, partially overmolded with plastic, of an electric motor for driving a motor
  • FIG. 2 shows the rotor protected against corrosion by a corrosion protection film according to FIG. 1.
  • the motor part 1 shows an engine part 1 embodied as a rotor for an electric motor through which an ethanol-containing fuel (for example ethanol fraction> 85%) flows, which serves as the drive motor of a fuel pump of a motor vehicle.
  • the motor part 1 comprises a motor shaft 2 (armature shaft), on which an armature packet 3 (disk pack, armature lamination stack) is seated against rotation.
  • the anchor packet 3 is for increasing the Stability and for reasons of fuel supply / fuel line (flow guidance) largely encapsulated with plastic 4.
  • copper lines are guided, which are contacted via a commutator 5, which is arranged axially adjacent to the anchor packet 3.
  • the rotor may also be equipped with permanent magnets to be protected from the fluid, in particular rare earth magnets.
  • the armature core 3 consisting of steel plates projects up to the outer circumference of the motor part 1 designed as a rotor.
  • the armature core 3 is immediately aggressive, passing through a circumferential gap between the rotor and a stator Fuel exposed, whereby corrosion phenomena over time are unavoidable.
  • the commutator 5, which is arranged axially adjacent to the armature packet 3, has exposed copper surfaces 6 which can be contacted directly by brushes, not shown.
  • the motor part 1 can be assigned a corrosion protection foil 7 designed as a corrosion protection cover.
  • the trained as a film tube corrosion protection film 7 is this over the motor part 1 slipped over in the axial direction and shrunk in a subsequent step by external heating on the motor part 1 outside, so that the anti-corrosion film 7 seals both the anchor package 3 and the copper surfaces 6 of the commutator 5, ie protects against direct contact with the fuel flowing through the electric motor.
  • FIG. 1 As can be seen from FIG.
  • the entire motor part 1 is not enveloped by the anticorrosion film 7 - which is alternatively also possible - but the anticorrosive film 7 contacts the plastic 4 at the outside with an axial distance to the left end of the rotor and extends from There starting in the axial direction to the commutator 5 and from there beyond the visible in Fig. 1 outside copper surfaces 6 and is set with axial distance to the right rotor end of the rotor, so that in the consequence direct contact between the fuel and metal areas of the engine part 1 is safely avoided.
  • the anticorrosion film 7 is made of polyethylene terephthalate and has a thickness of less than 100 ⁇ m. Due to the small thickness of the corrosion protection film 7 electrical power losses are avoided, or at least minimized.
  • the engine part 1 shown is completely without additional tinning of the engine part 1 from.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne une pièce de moteur (1) pour un moteur électrique traversé notamment par un fluide, de préférence du carburant. Conformément à l'invention, la pièce de moteur (1) est enrobée au moins sur certaines sections d'un film de protection anticorrosion (7).
PCT/EP2008/067290 2008-02-07 2008-12-11 Pièce de moteur, procédé de protection anticorrosion et moteur électrique Ceased WO2009097935A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008000248.8 2008-02-07
DE200810000248 DE102008000248A1 (de) 2008-02-07 2008-02-07 Motorteil, Korrosionsschutzverfahren sowie Elektromotor

Publications (1)

Publication Number Publication Date
WO2009097935A1 true WO2009097935A1 (fr) 2009-08-13

Family

ID=40547866

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/067290 Ceased WO2009097935A1 (fr) 2008-02-07 2008-12-11 Pièce de moteur, procédé de protection anticorrosion et moteur électrique

Country Status (2)

Country Link
DE (1) DE102008000248A1 (fr)
WO (1) WO2009097935A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101138207B1 (ko) 2010-02-10 2012-05-10 주식회사 코아비스 연료펌프용 아마추어 및 그 제조 방법
DE102010054026A1 (de) * 2010-12-09 2012-06-14 Continental Automotive Gmbh Elektronisch kommutierter Elektromotor mit zwei Phasen und Verwendung eines solchen Elektromotors
DE102013213967A1 (de) * 2012-12-21 2014-06-26 Continental Automotive Gmbh Verfahren zur Herstellung eines Elektromotors und Elektromotor
DE102013210726A1 (de) * 2013-06-10 2014-12-11 Robert Bosch Gmbh Naßbetriebener Anker
DE102023109824A1 (de) * 2023-04-19 2024-10-24 Schaeffler Technologies AG & Co. KG Elektromaschine mit einer folienförmigen Isolierung aus einem thermoplastischen Werkstoff

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS602040A (ja) * 1983-06-15 1985-01-08 Mitsubishi Electric Corp モ−ルド水中電動機
JPH04281350A (ja) * 1991-03-05 1992-10-06 Mitsubishi Electric Corp キャンドモータ
EP1054499A2 (fr) * 1999-05-20 2000-11-22 Mannesmann VDO Aktiengesellschaft Moteur électrique à utiliser dans un milieu agressif
WO2000074209A1 (fr) * 1999-05-28 2000-12-07 Mccord Winn Textron Emmanchement a chaud de tube pour segments magnetiques
DE10110660A1 (de) * 2000-08-31 2002-05-16 Mitsubishi Electric Corp Rotor eines Motors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS602040A (ja) * 1983-06-15 1985-01-08 Mitsubishi Electric Corp モ−ルド水中電動機
JPH04281350A (ja) * 1991-03-05 1992-10-06 Mitsubishi Electric Corp キャンドモータ
EP1054499A2 (fr) * 1999-05-20 2000-11-22 Mannesmann VDO Aktiengesellschaft Moteur électrique à utiliser dans un milieu agressif
WO2000074209A1 (fr) * 1999-05-28 2000-12-07 Mccord Winn Textron Emmanchement a chaud de tube pour segments magnetiques
DE10110660A1 (de) * 2000-08-31 2002-05-16 Mitsubishi Electric Corp Rotor eines Motors

Also Published As

Publication number Publication date
DE102008000248A1 (de) 2009-08-13

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