EP3292620A1 - Boîtier pour machine électrique et machine électrique - Google Patents

Boîtier pour machine électrique et machine électrique

Info

Publication number
EP3292620A1
EP3292620A1 EP16714875.8A EP16714875A EP3292620A1 EP 3292620 A1 EP3292620 A1 EP 3292620A1 EP 16714875 A EP16714875 A EP 16714875A EP 3292620 A1 EP3292620 A1 EP 3292620A1
Authority
EP
European Patent Office
Prior art keywords
housing
housing wall
deep
wall
electric machine
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
EP16714875.8A
Other languages
German (de)
English (en)
Inventor
Holger Fröhlich
Sönke GÜRTLER
Wolfgang Halbmeyer
Martin Voss
Michael Perner
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.)
Vitesco Technologies GmbH
Original Assignee
Continental 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP3292620A1 publication Critical patent/EP3292620A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • 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
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor

Definitions

  • the invention relates to a housing for an electric machine and an electric machine with a said housing, in particular as a drive unit of a hybrid electric / electric vehicle, such.
  • a starter generator is used as a starter generator.
  • the housing of the electrical machines are formed with cooling channels through which during operation of the electrical machines cooling liquid for cooling the electrical machines is performed.
  • Such housings are now produced in a casting process, wherein the cooling channels are molded during casting on housing walls with.
  • the casting process requires a relatively large amount of material, such as for molded parts, and requires further sometimes complex post-processing, such as a spanab ⁇ lifting processing. Consequently, the electrical machines are associated with casings produced by casting process with high production costs and costs.
  • the object of the present invention is to show a possibility with which an electrical machine or a housing of an electrical machine can be manufactured easily and inexpensively. Description of the invention:
  • a housing for an electrical machine comprises a deep-drawn housing inner part with an inner housing wall and also a deep-drawn housing outer part with an outer housing wall.
  • the inner housing wall is a substantially in ⁇ We sentlichen cylindrical cavity (DER cylinder) formed in jacket-like circumferential.
  • the outer housing wall like the inner housing wall, is substantially encircling (barrel-shaped) and is connected to the inner housing wall in a media-tight manner.
  • a cooling channel (in particular in the form of a hollow-cylindrical hollow space enclosed between the inner and the outer housing wall) is thus formed through the inner and outer housing walls, through which a cooling fluid can be passed for cooling the electrical machine.
  • Housing outer part are made by deep-drawing, the housing can be compared to a housing with die-cast housing parts in a few manufacturing steps and with little material and thus made much cheaper.
  • the housing parts can be or the housing walls with a high production speed ⁇ and thus produced inexpensively as a mass product (housing inner part and -au chatteil so). This provides a possibility with which an electrical machine or a housing of an electrical machine can be manufactured simply and inexpensively.
  • the inner and the outer housing wall to form the cooling channel are preferably connected to each other cohesively media-tight.
  • the two housing walls are welded together, in particular by beam welding method such. B. electron beam or laser beam welding.
  • a cohesive, in particular electron beam or laser beam welded, connection allows a low-maintenance stable connection of the two housing walls.
  • Electron beam or laser welding allows thin, high quality welds that do not require reworking.
  • the electron beam or laser welding process is carried out as a non-contact welding method without force on the housing parts or the housing walls.
  • Other advantages of the electron beam or laser welding process are low thermal distortion due to targeted action on a very narrow range, as well as the ability to weld from a distance to hard to reach areas of the housing parts.
  • the two housing parts are substantially formed of metal sheets, preferably of steel sheets, in particular of corrosion-protected alloyed or galvanized steel sheets, in a deep-drawing process.
  • metal sheets preferably of steel sheets, in particular of corrosion-protected alloyed or galvanized steel sheets, in a deep-drawing process.
  • Such metal rela ⁇ hung, steel sheets are available in different strengths and Ma ⁇ material characteristics available at low cost.
  • the housing inner part and / or the housing outer part preferably has a deep-drawn bottom region, which delimits the cavity on one side.
  • the bottom region is integrally formed with the housing inner wall and / or the housing outer wall in a deep drawing process.
  • the bottom region preferably has a holder element, which is tubular in shape during the deep-drawing process of the bottom region, in particular protruding into the cavity, on the bottom region.
  • the holder member serves for receiving and mounting a rotor shaft bearing of the electrical machine at the Ge ⁇ housing.
  • the rotor shaft bearing can be fixed concentrically and rotationally fixed, on which in turn a rotor shaft of the electric machine can be rotatably mounted.
  • the retaining element has stiffening beads, which give the retaining element and thus the housing additional mechanical rigidity and enable a stable seating of the rotor shaft bearing on the housing.
  • the bottom portion with the inner and / or the outer housing wall is integrally formed from one and the same workpiece, in particular one and the same Ronde, in one and the same thermoforming process.
  • an electric machine comprising a previously described housing and a stator, wherein the stator is arranged in the cylindrical cavity of the housing and is rotatably connected to the inner housing wall.
  • Figure 1 is a schematic cross-sectional view of an electrical machine according to an embodiment of the invention.
  • FIG. 3 is a schematic perspective view of the in
  • FIG. 1 illustrated housing
  • FIG. 1 shows an electrical machine EM in a schematic cross-sectional representation.
  • the electric machine EM comprises a housing GH, which encloses a substantially cylindrical cavity HR. In this cavity HR, the electric machine EM on a stator ST, which is rotatably connected to the housing GH.
  • the electric machine EM further comprises a rotor RT, which is also arranged in the cavity HR and concentric with the stator ST.
  • the rotor RT comprises a rotor shaft RW.
  • the rotor shaft RW is rotatably mounted in the housing GH via two rotor shaft bearings WL1 and WL2.
  • FIG. 2 shows the housing GH of the electric machine EM shown in FIG. 1 in a schematic cross-sectional representation.
  • the housing GH comprises a housing inner part IT, a housing ⁇ outer side part AT and a housing cover GD, which is also a bearing plate of the electric machine EM.
  • the housing inner part IT comprises a substantially cylindrical jacket-shaped inner housing wall IW, which surrounds the cavity HR of the housing GH in the form of a jacket.
  • the housing inner part IT further comprises a bottom portion BB, which is integrally formed with the inner housing wall IW and defines both the inner housing wall IW and the cavity HR unilaterally.
  • the bottom region BB has in the middle a Kegelmantelförmig protruding into the cavity HR shaped portion KAI and on the exposed end of the cone-shaped portion KAI tubular from the cavity HR outstanding ge ⁇ shaped second section RAI, wherein the two sections KAI, RAI together Form holder element HEI.
  • a rotor shaft bearing WL1 is concentrically arranged and secured against rotation. In this case, the outer ring of the rotor shaft bearing WL1 on the holder element HEI electron beam or laser welded and thus enclosed by the holder element HEI.
  • the cone-shaped portion also has KAI stiff- on Fung beads VS, which are evenly distributed over the circumference of the ex ⁇ KAI-section and extending radially toward the tubular portion RAI. These stiffening beads VS give the retaining element HEI additional mechanical rigidity and thus a better grip for the rotor shaft bearing WL1.
  • the outer housing part AT comprises a substantially zylm- dermantelförmig trained outer housing wall AW, which surrounds the inner housing wall IW jacket-shaped.
  • the diameters of the inner and outer housing walls IW, AW are matched to each other so that the two housing walls IW, AW together enclose a hollow cylindrical cavity which forms a cooling channel KK for passing a cooling liquid for cooling the electric machine EM.
  • the inner housing wall IW has at a side facing away from the bottom region BB side of a radially protruding from the cavity HR circular disk-shaped portion which forms a flange FL1 of the inner housing wall IW.
  • the outer housing wall AW on a side facing away from the bottom region BB on a radially projecting from the cavity HR circular disk-shaped portion which forms a flange FL2 of the outer housing wall AW.
  • the two flanges FL1, FL2 are contacted with each other surface and electron beam or laser beam welded and thus connected media-tight.
  • the outer housing wall AW At the side facing away from the flange FL2 side, the outer housing wall AW to a radially projecting towards the cavity in HR end region EB having an annular disk-shaped connection ⁇ surface VFl.
  • the inner housing wall IW at a stepped tapered portion AB having a connecting surface with the VFl the outer housing wall AW corres ⁇ commanding compound surface VF2.
  • the two Verbin ⁇ dung surfaces VFl, VF2 of the outer and the inner housing wall AW, IW are also in planar contact with each other and elekt ⁇ ronenstrahl- or laser-welded and thus sealed to the media.
  • the housing cover GD delimits the two housing walls AW, IW and the cavity HR from a side opposite the bottom region BB sides.
  • the housing cover GD is substantially cup-shaped and thus encloses a portion of the cavity HR, in which a
  • Electronic assembly EA for operating the electric machine EM such as. z.
  • the housing cover GD has an annular disk-shaped end section, which forms a further flange FL3, which contacts the previously described two flanges FL1, FL2 of the inner and outer housing walls IW, AW in a planar manner.
  • the housing cover GD or bearing plate can now be screwed or welded to the housing GH.
  • Fig. 3 shows a screw-type version with corresponding design ⁇ details as the Anschraubdomen.
  • the housing cover GD further has in the middle of a cone-shaped protruding into the cavity HR shaped portion KA2 and a tube on the exposed end of the cone-shaped portion KA2 outstanding from the cavity HR outstanding shaped second section RA2, wherein the two sections KA2, RA2 in common form a further holder element HE2.
  • a further rotor ⁇ shaft bearing WL2 of the electric machine EM is arranged concentrically and rotatably secured.
  • Both the housing inner part IT, the housing outer part AT and the housing cover GD are each made of a galvanized sheet steel in a liquid-cooled deep drawing process.
  • the housing parts IT, AT, or the housing walls IW, AT and the housing cover GS can be formed in a single-stage or multi-stage deep drawing process.
  • the housing parts IT, AT, or the housing walls IW, AW and the housing cover GD or the bearing plate on a wall thickness of about 1.5 to 2.5 millimeters.
  • the housing GH can be produced in a simple manner, which is also stable and low maintenance.
  • FIG. 3 shows the housing GH in a schematic perspective view.
  • the stiffening beads VS are clearly visible, which are distributed uniformly over the circumference of the cone-shaped portion KAI and extend radially toward the tubular portion RAI.
  • the housing GH furthermore has fastening elements BE, which are distributed over the circumference of the housing GH and welded to the housing GH, especially electron beam welded.
  • the fastening elements BE are integrally formed in the deep-drawing process on the housing outer part AT or on its housing outer wall AW.
  • the electrical machine EM is attached to a drive train of a hybrid electric / electric vehicle via the fastening elements BE.
  • FIG. 4 shows, in a schematic cross-sectional view, a further housing GH 'for an electrical machine.
  • the housing GH 'shown here differs from the previously described housing GH in that this housing GH' has a flangeless housing inner wall IW 'and a flangeless housing
  • Housing outer wall AW ' which together instead of a flange (as in the housing walls IW, AW of the previously described housing GH) are connected media-tight exclusively by means of welded joints.
  • the inner housing wall IW has two corresponding welding surfaces on the side facing the outer housing wall AW. The corresponding ones
  • Welding surfaces of the outer and inner housing walls AW, IW are electron beam or laser welded together.
  • the resultant cylindrical jacket-shaped extensive flat welds SV1, SV2 form media-tight seal for the formed between the outer and the inner housing wall AW, IW cooling channel KK 'from.
  • the housing cover GD ' which also serves as a bearing plate in this embodiment, defines the inner housing wall IW and the cavity enclosed by the inner housing wall IW HR unilaterally. Between the housing cover GD 'and the inner housing wall IW, an O-ring OR is arranged, which seals the cavity HR from the environment media-tight.
  • the housing cover GD or end shield is bolted or clamped to the housing GH and can additionally accommodate the aforementioned electronic assembly EA.

Landscapes

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

Abstract

L'invention concerne un boîtier (GH, GH') destiné à une machine électrique (EM), comprenant : - une partie intérieure de boîtier (IT) emboutie présentant une paroi de boîtier intérieure (IW, IW'), laquelle entoure à la manière d'une enveloppe une cavité sensiblement cylindrique, - une partie extérieure de boîtier (AT) emboutie présentant une paroi de boîtier extérieure (AW, AW'), laquelle entoure à la manière d'une enveloppe la paroi de boîtier intérieure (IW, IW') et est liée de manière étanche à la paroi de boîtier intérieure (IW, IW'), un canal de refroidissement (KK) permettant de conduire un liquide de refroidissement, ce canal étant formé par la paroi de boîtier intérieure (IW, IW') et la paroi de boîtier extérieure (AW, AW').
EP16714875.8A 2015-05-05 2016-04-05 Boîtier pour machine électrique et machine électrique Ceased EP3292620A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015208299.7A DE102015208299A1 (de) 2015-05-05 2015-05-05 Gehäuse für eine elektrische Maschine, elektrische Maschine
PCT/EP2016/057439 WO2016177525A1 (fr) 2015-05-05 2016-04-05 Boîtier pour machine électrique et machine électrique

Publications (1)

Publication Number Publication Date
EP3292620A1 true EP3292620A1 (fr) 2018-03-14

Family

ID=55697177

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16714875.8A Ceased EP3292620A1 (fr) 2015-05-05 2016-04-05 Boîtier pour machine électrique et machine électrique

Country Status (3)

Country Link
EP (1) EP3292620A1 (fr)
DE (1) DE102015208299A1 (fr)
WO (1) WO2016177525A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109038952B (zh) * 2018-07-28 2020-09-29 襄阳世阳电机有限公司 纺织用水冷电机
DE102022214013A1 (de) 2022-12-20 2024-06-20 Robert Bosch Gesellschaft mit beschränkter Haftung Anschlussplatte für eine elektrische Maschine mit einem flexiblen Entkoppelelement

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1308475B1 (it) * 1999-05-07 2001-12-17 Gate Spa Motoventilatore, particolarmente per uno scambiatore di calore di unautoveicolo
DE102006035697A1 (de) * 2006-08-01 2008-02-07 Temic Automotive Electric Motors Gmbh Maschinengehäuse einer elektrischen Maschine
DE102006035696A1 (de) * 2006-08-01 2008-02-07 Temic Automotive Electric Motors Gmbh Maschinengehäuse einer elektrischen Maschine
DE102009010461A1 (de) * 2009-02-13 2010-08-19 Alfred Kärcher Gmbh & Co. Kg Motorpumpeneinheit
DE102012205754A1 (de) * 2012-04-10 2013-10-10 Continental Automotive Gmbh Gehäuse für eine rotierende elektrische Maschine
US9450468B2 (en) * 2013-03-14 2016-09-20 Remy Technologies, Llc L-shaped sheet metal cooling jacket with baffles and integrated power electronics
DE102013216092A1 (de) * 2013-08-14 2015-02-19 Continental Automotive Gmbh Gehäuse für eine Antriebsanordnung und Antriebsanordnung mit einem Gehäuse
DE102013222697A1 (de) * 2013-11-08 2015-05-13 Em-Motive Gmbh Elektrische Maschine mit in ein Gehäuse integriertem Kühlkanal
DE202014101324U1 (de) * 2014-03-21 2014-03-31 Robert Bosch Gmbh Elektrische Maschine mit einem Kühlkörper

Also Published As

Publication number Publication date
DE102015208299A1 (de) 2016-11-10
WO2016177525A1 (fr) 2016-11-10

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