[go: up one dir, main page]

WO2008077692A1 - Arrangement de palier et machine électrique à rotation rapide - Google Patents

Arrangement de palier et machine électrique à rotation rapide Download PDF

Info

Publication number
WO2008077692A1
WO2008077692A1 PCT/EP2007/062612 EP2007062612W WO2008077692A1 WO 2008077692 A1 WO2008077692 A1 WO 2008077692A1 EP 2007062612 W EP2007062612 W EP 2007062612W WO 2008077692 A1 WO2008077692 A1 WO 2008077692A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
bearings
bearing arrangement
ball roller
ball
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/EP2007/062612
Other languages
German (de)
English (en)
Inventor
Peter Schaaf
Rainer Eidloth
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.)
IHO Holding GmbH and Co KG
Original Assignee
Schaeffler KG
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 Schaeffler KG filed Critical Schaeffler KG
Publication of WO2008077692A1 publication Critical patent/WO2008077692A1/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
    • 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
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
    • F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/34—Rollers; Needles
    • F16C33/36—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/03—Machines characterised by thrust bearings

Definitions

  • the invention relates to a bearing assembly for a high-speed electric machine, each comprising a arranged in the axial direction in front of and behind the rotor of the electric motor bearings.
  • Such bearing arrangements are used, for example, for electrical machines of motor vehicles, that is, for example, for alternators, starter motors, starter generators, motors for driving ancillaries of the drive motor, etc.
  • the bearings of such electric machines are generally equipped with a permanent lubrication, the bearings are filled with grease and sealed to the outside by bearing seals. A renewal of the grease depot during the design life of the bearings is not provided.
  • the requirements placed on such bearing arrangements are generally a good seal against grease leakage or entry of dirt particles, water and the like, a compact design and low operating noise.
  • the bearing seals should thus on the one hand prevent the escape of grease, so that the intended grease depot is maintained for the entire design life. On the other hand, however, they should also prevent the entry of dirt particles or the like, which could likewise impair the service life of the bearing arrangement.
  • the performance of electrical machines increases with increasing speed. In order to achieve the most compact possible design for a given power, they generally turn at very high speeds. The speed of modern generators is for example at 20,000 rpm. In this temperature are temperatures of 150 0 C was reached. In order to ensure low running noise despite the high rotational speeds, precision bearings with optimized cages and materials optimized for the above-mentioned applications as well as heat treatment processes are used, which ensure a low roughness of the raceways and the rolling elements.
  • the invention has for its object to provide a bearing assembly referred to in the preamble of claim 1 species, which ensures a longer life compared to the known bearing assembly and allows a more compact design of the electric machine.
  • the invention is based on the finding that the non-bearing areas of the ball-shaped rolling bearings contribute nothing to the function of the bearing, but rather only reduce the volume for receiving the grease reservoir and increase the axial dimensions of the bearing.
  • the invention is therefore based on a bearing arrangement for a rapidly rotating electric machine, each comprising a roller bearing arranged in the axial direction in front of and behind the rotor of the electric machine.
  • at least one of the roller bearings is designed as a ball roller bearing
  • the rolling elements have laterally opposite the spherical shape, ie in the non-bearing areas, flattened and mutually parallel Stirnflä-.
  • roller bearings are designed as a ball roller bearing. If the design specifications allow this, however, according to a preferred embodiment, both roller bearings are designed as ball roller bearings, which increases the overall advantage.
  • the space between the outer and inner bearing rings obtained by eliminating the lateral spherical caps of the rolling elements can be used in different ways. According to one embodiment of the invention it is provided that this space is used to increase the volume for receiving a grease deposit. The increase in the volume essentially corresponds to the volume of the dropped ball caps. Another embodiment of the invention provides that the space obtained by the elimination of the lateral spherical caps of the rolling elements space between the outer and the inner bearing ring is used for the axial enlargement of this space axially final sealing rings. Since the conventional in ball bearings can be installed sealing rings are usually very narrow, they are occasionally hardly able to cope with the high demands on the tightness of the bearings. The space gained makes it possible to form the sealing rings stronger and to improve their sealing effect permanently.
  • the invention also offers the possibility to use the space obtained by the elimination of the lateral spherical caps of the rolling elements for the axial shortening of the ball bearing.
  • the possible shortening of the bearing corresponds essentially to twice the height of the dropped ball caps.
  • Another advantage of the invention is also seen in the fact that the space obtained by the elimination of lateral spherical caps of the rolling elements can be used with a constant axial dimension of the bearing to increase the ball roller diameter and thus to improve the load rating of the bearing.
  • Figure 1 shows a longitudinal section of an electric machine with an axially in front of and behind the rotor arranged bearings
  • Figure 2 shows a detail of a bearing assembly approximately according to Figure 1 with different rolling elements.
  • the electric machine 2 shown in FIG. 1, for example a generator or an electric motor of a motor vehicle, comprises a shaft 6 which is rotationally driven via a belt pulley 4 and on which a rotor 8 is arranged in a rotationally fixed manner.
  • the shaft 6 is mounted rotatably in a housing 14 via a first, larger ball roller bearing 10 arranged in the direction of the rotor axis 18 in front of the rotor 8 and a second, smaller ball roller bearing 12 arranged behind the rotor 8.
  • the two ball roller bearings 10, 12 each have a non-rotatably mounted in the housing 14 outer bearing ring 11 and a rotatably connected to the rotatable shaft 6 inner bearing ring 13, between which held in a cage 17 ball rollers 1 1 are arranged.
  • a cooperating with the rotor 8 stator 16 is also arranged and fixed there.
  • FIG. 1 shows an example of the fact that the space between the outer bearing ring 11 and the inner bearing ring 13 obtained by eliminating the lateral spherical caps of the rolling elements 15 is used to increase the volume for receiving a grease deposit, the axial dimensions of the bearing 10, 12 are unchanged relative to a bearing with vollkugeligen Wälzkör- pern.
  • FIG. 1 shows a comparison between a conventional ball bearing and a ball roller bearing same axial bearing width b.
  • the bearing 20 shown in the lower part of Figure 2 is equipped with vollkugelig trained rolling elements 22.
  • the seals 28 and 30 axially sealed space and thus the volume of the accommodated therein grease deposit is relatively small, so that there is a correspondingly low design life of this camp.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

La présente invention concerne un arrangement de palier pour une machine (2) électrique à rotation rapide comprenant respectivement un palier de roulement disposé dans une direction axiale à l'avant et à l'arrière du rotor (8) de la machine électrique. Conformément à l'invention, les paliers de roulement sont de préférence réalisés sous la forme de roulements (10, 12, 36) à billes dont les éléments (15, 46) de roulement présentent des faces frontales parallèles les unes aux autres et aplaties latéralement par rapport à la forme sphérique. L'espace obtenu en supprimant les calottes (32, 34) sphériques peut être utilisé pour augmenter le dépôt de graisse de lubrification, pour renforcer les bagues (42, 44) d'étanchéité associées au palier et réalisant l'étanchéité du dépôt de graisse de lubrification vers l'extérieur, pour raccourcir le palier dans le sens axial ou, avec une largeur axiale (b) identique du palier, pour augmenter le diamètre des billes.
PCT/EP2007/062612 2006-12-21 2007-11-21 Arrangement de palier et machine électrique à rotation rapide Ceased WO2008077692A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006060550.0 2006-12-21
DE102006060550A DE102006060550A1 (de) 2006-12-21 2006-12-21 Lageranordnung für eine schnell drehende Elektromaschine

Publications (1)

Publication Number Publication Date
WO2008077692A1 true WO2008077692A1 (fr) 2008-07-03

Family

ID=39004993

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/062612 Ceased WO2008077692A1 (fr) 2006-12-21 2007-11-21 Arrangement de palier et machine électrique à rotation rapide

Country Status (2)

Country Link
DE (1) DE102006060550A1 (fr)
WO (1) WO2008077692A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1575587A1 (de) * 1965-07-01 1970-01-15 Nadella Nadel- oder Rollenradiallager
GB2298682A (en) * 1995-03-10 1996-09-11 Torrington Co Ball bearing and bearing ball therefor
DE19737045A1 (de) * 1997-08-26 1999-03-04 Fag Automobiltechnik Ag Lagerung eines Elektromotors
JP2003299299A (ja) * 2002-04-02 2003-10-17 Nsk Ltd ダイレクトドライブモータのロータ支持構造
US20050117827A1 (en) * 2002-01-11 2005-06-02 Nsk Ltd. Rolling bearing
US20050168085A1 (en) * 2004-01-29 2005-08-04 Denso Corporation Bearing device and AC generator for vehicles using the same
WO2006102863A1 (fr) * 2005-03-31 2006-10-05 Schaeffler Kg Palier a roulement radial, en particulier roulement a rainure a une seule rangee

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816672A1 (de) * 1978-04-18 1979-10-31 Bosch Gmbh Robert Elektrische maschine, insbesondere eigengelagerter drehstromgenerator
DE4334195A1 (de) * 1993-10-07 1994-03-24 Geuer Mann Ernst Radial-Wälzlager mit Kugelscheiben

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1575587A1 (de) * 1965-07-01 1970-01-15 Nadella Nadel- oder Rollenradiallager
GB2298682A (en) * 1995-03-10 1996-09-11 Torrington Co Ball bearing and bearing ball therefor
DE19737045A1 (de) * 1997-08-26 1999-03-04 Fag Automobiltechnik Ag Lagerung eines Elektromotors
US20050117827A1 (en) * 2002-01-11 2005-06-02 Nsk Ltd. Rolling bearing
JP2003299299A (ja) * 2002-04-02 2003-10-17 Nsk Ltd ダイレクトドライブモータのロータ支持構造
US20050168085A1 (en) * 2004-01-29 2005-08-04 Denso Corporation Bearing device and AC generator for vehicles using the same
WO2006102863A1 (fr) * 2005-03-31 2006-10-05 Schaeffler Kg Palier a roulement radial, en particulier roulement a rainure a une seule rangee

Also Published As

Publication number Publication date
DE102006060550A1 (de) 2008-06-26

Similar Documents

Publication Publication Date Title
DE4322674C2 (de) Elektrischer Getriebemotor für ein Fahrzeug
DE102015214309A1 (de) Hohlwellenkühlung für einen Antrieb eines Elektrofahrzeugs
DE102015218280B4 (de) Elektrische Maschine und Kraftfahrzeug
DE102008053914A1 (de) Wellengenerator für ein Spannungswellengetriebe sowie Spannungswellengetriebe
DE2252415A1 (de) Lageranordnung
DE102011088060A1 (de) Pumpeneinheit mit einer Pumpe und einem Hybridantrieb
DE102021207050A1 (de) Elektrische Antriebsachse
WO2023094191A1 (fr) Agencement de mise à la terre d'un arbre
WO2023094195A1 (fr) Dispositif de mise à la terre d'un arbre
DE102021213388A1 (de) Anordnung zur Erdung einer Welle
DE102016106996B4 (de) Dichtungsanordnung für eine Welle
DE102010051041A1 (de) Antriebsanordnung
DE102019210778A1 (de) Elektrische Antriebseinheit für ein zumindest teilweise elektrifiziertes Kraftfahrzeug
DE102010019130A1 (de) Zylinderkopf
DE102021214533A1 (de) Anordnung zur Erdung einer Welle
WO2008077692A1 (fr) Arrangement de palier et machine électrique à rotation rapide
DE19940456B4 (de) Lageranordnung zur Verwendung mit Wasserpumpen
DE102021121292B4 (de) Wälzlageranordnung, elektrische Maschine und Antriebsstrang
DE102023201006A1 (de) Anordnung zur Erdung einer Welle
DE102022213926A1 (de) Getriebe für ein Fahrzeug sowie Antriebsstrang mit einem solchen Getriebe
DE102018218820A1 (de) Elektrische Maschine mit einer Fluid-Kühleinrichtung
DE102023104827A1 (de) Wellenerdung, elektrische Maschine und Kit-of-Parts
DE10354998B4 (de) Kompakte Differentialanordnung
DE102023115917B4 (de) Wellenerdung, elektrische Maschine und elektrisch betreibbarer Achsantriebsstrang
DE102023115915A1 (de) Wellenerdung, elektrische Maschine und Kit-of-Parts

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07847244

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07847244

Country of ref document: EP

Kind code of ref document: A1