EP3928416A1 - Flasque pour une machine électrique tournante, utilisation associée et machine électrique tournante - Google Patents

Flasque pour une machine électrique tournante, utilisation associée et machine électrique tournante

Info

Publication number
EP3928416A1
EP3928416A1 EP20714911.3A EP20714911A EP3928416A1 EP 3928416 A1 EP3928416 A1 EP 3928416A1 EP 20714911 A EP20714911 A EP 20714911A EP 3928416 A1 EP3928416 A1 EP 3928416A1
Authority
EP
European Patent Office
Prior art keywords
end shield
bearing
shield according
geometry
electric rotating
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.)
Pending
Application number
EP20714911.3A
Other languages
German (de)
English (en)
Inventor
David FINCK
Martin Johannes
Felix Ntourmas
Christian Seidel
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.)
Siemens Mobility GmbH
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP3928416A1 publication Critical patent/EP3928416A1/fr
Pending 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
    • 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

Definitions

  • End shield for an electric rotating machine usage for this and electric rotating machine
  • the invention relates to a bearing plate for motors, in particular electric rotating machines such as electric motors and / or generators with improved rigidity.
  • a bearing plate connects the housing of an electric motor with the bearing for the rotating rotor.
  • a first end shield of an electric motor or generator carries a floating bearing, which usually cannot withstand any axial forces, and a second bearing shield carries the fixed bearing.
  • the fixed bearing absorbs forces acting in the axial direction and the corresponding end shield is correspondingly massive in size and constructed.
  • This second end shield of the fixed bearing is the component via which the large mass of the motor is connected to the housing.
  • the entire rotor area can oscillate in the axial direction, with the end shield acting as a kind of spring.
  • the end shield is therefore designed and dimensioned to be as rigid as possible in order to keep the first natural frequency of the motor as high as possible. This prevents the first natural frequency of the motor from falling within the motor's speed range.
  • the lower natural frequency limit is 50 Hz without taking any safety factors into account.
  • a bearing plate is usually flat and rigid, with corresponding holes for fixing.
  • Figure 1 shows a bearing plate according to the prior art.
  • a problem with a common end shield, as shown in FIG. 1, is that the rigidity is achieved via the mass, with particularly heavy and thick end shields simply having the higher flexural strength.
  • a thicker end shield, on the other hand, requires longer screws. At a certain point the softest part of the end shield slides onto the screw connections. There is therefore a reasonable upper limit for the thickness of an end shield.
  • the object of the present invention is therefore to provide a Gestal device for such a bearing plate that brings a higher rigidity of the bearing plate with the same mass.
  • the present invention provides a round end shield (1) for a housing of a rotating electrical machine, a device for receiving a bearing inside with an inner fastening circle (6) and with tel for fastening the end shield to the housing of the electrical machine's outside with having an outer circle of attachment (7),
  • the end shield has a geometry that is suitable for counteracting the deformation of the first natural frequency, because the known flat and / or flat shape is created by bending the end shield, in particular with the same or even reduced mass and / or wall thickness of the end shield, respectively side, of the bearing shield overcomes.
  • the geometry is such that the planes of the device for receiving the bearing on the one hand and the plane of the means for fastening the end shield to the housing on the other hand are displaced against each other in the direction of the axial length of the electrical machine.
  • a geometry which is suitable for counteracting the deformation of the first natural frequency is a conical end shield geometry - as shown in FIG. 2. With the correct and / or optimized design, this can achieve a significantly higher flexural rigidity with the same or even lower mass than the conventional plate-shaped end shields, as shown in FIG. Investigations have shown that with a conical bearing plate geometry, the deformation of the first natural frequency is deliberately prevented because it is shifted to a higher frequency range. This effect was found here for the first time and replaces the usual increase in panel thickness in construction practice and / or the introduction of load-path-oriented rib structures as constructive approaches to increasing the rigidity.
  • the geometry which is suitable for counteracting the deformation of the first natural frequency is a conical geometry.
  • this is implemented in that the means for fastening the end shield to the housing of the electrical machine are shifted on the axis with respect to the device for receiving the bearing. The extent of the shift corresponds to the deviation of the end shield from the flat geometry towards the conical geometry.
  • the stability of the novel end shield can be increased on the one hand by attaching a suitable rib structure to the underside and / or the side of the end shield that forms the cone, but on the other hand the conical deformation is sufficient with the same and / or even reduced wall thickness of the end shield to achieve the stabilizing effect.
  • This also results in the improvement over conventional bearing shields, which has been proven in tests, that the conical bearing shield geometry, when correctly and / or optimized, achieves a significantly higher flexural strength with a lower mass compared to the conventional geometry variants.
  • the device for receiving the bearing is simply a circular or round recess in the end shield.
  • the means for fastening the end shield to the housing of the electrical machine are screws with corresponding bores on the outer edge of the end shield. For example, an assembly was produced for the simulation, assuming the middle disk with the exemplary vibrating mass of 137kg. The stress-stiffening effect of the screws and the means of fastening were also taken into account in the simulation.
  • a conical and not a flat geometry of the end shield is realized and accordingly, after installation in the electrical machine, the means for attaching the end shield to the housing of the electrical machine are not at the same height on the axis side as the device for receiving of the camp.
  • the means for fastening on the outside of the bearing plate remain unchanged because of the retention or even a reduction in the mass of the bearing plate or are even smaller or lighter.
  • the ratio of end shield mass to end shield stiffness could be determined as a first rough approximation, and a stiffener increased by more than 50% was determined. ability with reduced mass compared to the known full mass and / or rib geometries for end shields.
  • the geometry of the end shield disclosed here for the first time can be realized with all conceivable materials for end shields, for example the end shield can be made of metal, any metal alloys such as steel, aluminum, cast, on the other hand this geometry is also well suited for a realization in lightweight construction , so realize with reinforced plastics.
  • the bearing plate is in a geometry that is suitable to counteract the deformation of the first natural frequency, and also has rib structures to increase the stiffness.
  • the rib angles and / or the thickness of the end shield are adapted by means of a computer-aided geometry optimization.
  • the bearing plate geometry which is suitable for counteracting the deformation of the first natural frequency, is combined with fiber-reinforced construction materials.
  • This geometry can be implemented in common manufacturing processes and material classes of fiber-reinforced construction materials. The stated geometry then leads to a particularly greatly improved stiffness-to-mass ratio of the resulting end shield.
  • the geometry of a bearing plate which is suitable to counteract the deformation of the first natural frequency, is optimized to the effect that it is suitable for shifting the loads in the material from shear loads to tensile and compressive loads in the bearing plate.
  • This optimization is preferably computer-aided.
  • the construction materials that are particularly suitable here and are known to those skilled in the art also meet, for example, the requirements placed on vibration damping properties.
  • polymer-based fiber composites are particularly suitable as construction materials. These combine high structural rigidity, low specific weight and high vibration damping.
  • the fiber composite materials that can be used here can have a thermoplastic or a thermosetting polymer matrix. They can show any fiber reinforcement, as they are available on the market, for example, as so-called bulk and / or sheet molding compounds, also known as "BMC” or "SMC".
  • polymeric materials with fiber reinforcement for example glass fiber and / or carbon fiber reinforcement, are preferably used.
  • Fiber reinforced material is particularly preferably used.
  • a wide variety of materials, materials and / or reinforcing fibers can be combined to produce the end shield.
  • the materials from which the bearing plate is constructed are particularly preferably composed of mutually compatible - that is, can be combined without material disadvantage - materials.
  • ceramics and / or metals with fiber reinforcement are also used.
  • sheet molding compound material is also used in particular. It is particularly preferred if this material is used in combination with the carbon fiber reinforcement.
  • FIG 1 shows the prior art
  • FIG. 2 shows a bearing plate according to an exemplary embodiment of the invention with a conical geometry.
  • FIG. 1 shows the state of the art, a bearing plate 1 can be seen, which has a flat geometry, two flat sides or wall sides. Shown is an oblique view in which the internal device 2 for receiving the bearing - the latter not shown - the means 3 for fastening the end shield to the housing of the electrical machine outside and finally means 4 for fastening the bearing to the device 2 to accommodate the camp.
  • Vorrich device 5 for receiving the bearing with along an inner fastening circle 6 means for fastening the bearing are provided, which are present changed compared to the prior art.
  • the device 5 for receiving the bearing is not on one level with the outer circle 7 for attachment to the housing.
  • the inner screwing and / or connecting circle 6 is not on a plane with the outer fastening circle 7, on which the means for fastening the bearing are arranged on the housing, but axially offset thereof.
  • the axis of the rotating electrical machine is referred to as the "axis" in "axially related”.
  • a bearing plate according to one embodiment of the invention preferably shows no other wall thickness or material thickness than the plate and / or flat shape of the bearing plate according to the prior art, as shown in FIG. So the bearing shield is neither due to the cone shape heavier nor has a higher wall thickness than the plate and / or flat shapes of the conventional end shields, as shown in FIG.
  • the end shields differ in terms of the precise design of the ribs and / or the thickness of the cone.
  • the various geometries have been optimized with regard to the mass of the end shield, the mass of the motor and the natural frequency of the motor.
  • the ribs were tested on one side of the end shield and on both sides. Various types of ribbing were tested in simulations.
  • the arrangements of the ribs are varied, for example as star-shaped to the webs running in neren fastening circle. These preferably run in a straight line, but can, for example, still be connected to one another by transverse webs.
  • the transverse webs can in turn connect the longitudinally extending ribs leading from the outer to the inner fastening circle at all possible angles.
  • the webs that form the ribbing have different shapes and / or dimensions.
  • a bearing plate for an electrical rotating machine is presented, the geometry of which is suitable for counteracting the deformation of the first natural frequency.
  • a bearing plate geometry is presented, whose inner and outer fastening circle are axially shifted from one another.

Landscapes

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

Abstract

La présente invention concerne un flasque pour des moteurs, en particulier pour des machines électriques tournantes telles que des moteurs électriques et/ou des générateurs, présentant une rigidité améliorée. La présente invention concerne d'abord un flasque pour une machine électrique tournante, la géométrie du flasque étant appropriée pour s'opposer à la déformation de la première fréquence de résonance. La présente invention concerne en particulier la géométrie d'un flasque dont des cercles de fixation externe et interne sont décalés axialement l'un par rapport à l'autre.
EP20714911.3A 2019-03-29 2020-03-16 Flasque pour une machine électrique tournante, utilisation associée et machine électrique tournante Pending EP3928416A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019204456.5A DE102019204456A1 (de) 2019-03-29 2019-03-29 Lagerschild für eine elektrische rotierende Maschine, Verwendung dazu und elektrische rotierende Maschine
PCT/EP2020/057065 WO2020200722A1 (fr) 2019-03-29 2020-03-16 Flasque pour une machine électrique tournante, utilisation associée et machine électrique tournante

Publications (1)

Publication Number Publication Date
EP3928416A1 true EP3928416A1 (fr) 2021-12-29

Family

ID=70050043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20714911.3A Pending EP3928416A1 (fr) 2019-03-29 2020-03-16 Flasque pour une machine électrique tournante, utilisation associée et machine électrique tournante

Country Status (5)

Country Link
US (1) US20220190671A1 (fr)
EP (1) EP3928416A1 (fr)
CN (1) CN113875129A (fr)
DE (1) DE102019204456A1 (fr)
WO (1) WO2020200722A1 (fr)

Family Cites Families (21)

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SE346710B (fr) * 1970-11-02 1972-07-17 Skf Ind Trading & Dev
DE2810222A1 (de) * 1978-03-09 1979-09-13 Bosch Gmbh Robert Kuehlvorrichtung fuer elektrische maschinen
DE4039571C2 (de) * 1990-12-12 1999-01-07 Mulfingen Elektrobau Ebm Kollektorloser Außenläufermotor mit lösbar befestigten Lagerschilden
FI118941B (fi) * 2006-01-05 2008-05-15 Abb Oy Laakerikilpi
FR2898739B1 (fr) * 2006-03-15 2008-06-13 Skf Ab Systeme de support d'arbre pour moteur electrique, moteur electrique et procede de fabrication.
CN200956532Y (zh) * 2006-09-27 2007-10-03 许晓华 直流电机前端盖
DE102008013402A1 (de) * 2008-03-10 2009-09-17 Robert Bosch Gmbh Elektrische Maschine für ein Hybridfahrzeug sowie Lagerschild der elektrischen Maschine
DE102008036123A1 (de) * 2008-08-01 2009-08-27 Siemens Aktiengesellschaft Lagerschild für eine dynamoelektrische Maschine
DE102010062822A1 (de) * 2010-12-10 2012-06-14 BSH Bosch und Siemens Hausgeräte GmbH Gehäuseloser Elektromotor für ein Haushaltsgerät
CN202127314U (zh) * 2011-06-29 2012-01-25 湘潭市兴盛液压机械制造有限公司 一种风力发电机绝缘端盖
DE102012213897A1 (de) * 2012-08-06 2014-02-06 Siemens Aktiengesellschaft Gehäuse für Antriebswellen und Herstellungsverfahren dazu, sowie Verwendung eines Faserverstärkten Kunststoffes
DE102013004339A1 (de) * 2013-03-14 2014-09-18 Wilo Se Pumpenaggregat mit einer einstückigen Lagereinheit
DE102013227054A1 (de) * 2013-12-23 2015-06-25 Robert Bosch Gmbh Stator mit einer Umspritzung und elektrische Maschine mit dem Stator
CN204271791U (zh) * 2014-12-08 2015-04-15 江麓机电集团有限公司 一种基于无刷电机的机座体
JP2016151031A (ja) * 2015-02-17 2016-08-22 株式会社日立製作所 繊維強化複合材料
DE102015210788A1 (de) * 2015-06-12 2016-12-15 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Lagerschildsystem und elektromotorischer Antrieb mit einem Lagerschildsystem
DE102015111788A1 (de) * 2015-07-21 2017-01-26 Deutsches Zentrum für Luft- und Raumfahrt e.V. Gleitlagervorrichtung
CN106077666A (zh) * 2016-07-18 2016-11-09 安徽奥泰粉末冶金有限公司 一种汽车主轴轴承端盖及其生产工艺
KR101904871B1 (ko) * 2017-01-18 2018-10-08 엘지전자 주식회사 베어링카트리지를 구비한 전동기
CN108727854A (zh) * 2018-03-28 2018-11-02 台州市金宇机电有限公司 一种高机械强度耐腐蚀的非金属组合物及含有该组合物的端盖
CN208623433U (zh) * 2018-08-01 2019-03-19 雷勃电气（无锡）有限公司 一种具有辅助加强筋的轴承端盖

Also Published As

Publication number Publication date
DE102019204456A1 (de) 2020-10-01
CN113875129A (zh) 2021-12-31
WO2020200722A1 (fr) 2020-10-08
US20220190671A1 (en) 2022-06-16

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