EP2622720A2 - Rotor équilibré pour machine tournante et procédé pour équilibrer un rotor - Google Patents

Rotor équilibré pour machine tournante et procédé pour équilibrer un rotor

Info

Publication number
EP2622720A2
EP2622720A2 EP11740888.0A EP11740888A EP2622720A2 EP 2622720 A2 EP2622720 A2 EP 2622720A2 EP 11740888 A EP11740888 A EP 11740888A EP 2622720 A2 EP2622720 A2 EP 2622720A2
Authority
EP
European Patent Office
Prior art keywords
rotor
rivet
recesses
rotor body
balancing
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Withdrawn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
EP11740888.0A
Other languages
German (de)
English (en)
Inventor
Steffen Blum
Stephan Weissphal
Markus Minnermann
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 EP2622720A2 publication Critical patent/EP2622720A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/04—Balancing means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/30—Compensating imbalance
    • G01M1/36—Compensating imbalance by adjusting position of masses built-in the body to be tested
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/16—Centering rotors within the stator; Balancing rotors
    • H02K15/165—Balancing the rotor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49012—Rotor

Definitions

  • the invention relates to a balanced rotor for a rotary machine.
  • the invention further relates to a method for balancing a rotor for a rotary machine.
  • Rotating bodies such as rotors of rotary machines, should be balanced prior to start-up, especially if they are to be operated at high speeds.
  • Well-balanced rotors can be important for bearing and shaft life and for sound radiation and vibration transmission to the environment.
  • Rigid rotors can usually be balanced by adding or reducing masses at a certain distance from the rotation axis in one or more planes which are arranged perpendicular to a rotational axis of the rotor.
  • static imbalances the center of gravity of the rotor is not on the axis of rotation.
  • a static unbalance can ideally be eliminated with just one balance mass.
  • dynamic imbalances which are also referred to as moment imbalances
  • the center of gravity of the rotor is indeed on the axis of rotation, but the principal axis of inertia is not parallel to the axis of rotation. For balancing this is usually required several balancing masses on must be distributed at least two levels, so that the main axis of inertia of the rotor including the balancing masses is rotated so that it then lies on the axis of rotation.
  • rotatable bodies such as rotors for high speed rotary machines
  • additional balancing ring disks are usually arranged at the two opposite end faces of the rotor and rotate during operation of the rotor with the rotor.
  • additive balancing e.g. Lead weights are attached to the Duchtringhunt to compensate in this way an imbalance of the rotor can.
  • bores can be introduced into the co-rotating rolling disk, whereby a center of gravity of the co-rotating disk is displaced and in turn an imbalance of the rotor can be compensated. This is called subtractive balancing.
  • a balanced rotor for a rotary machine has at least one disk-shaped rotor body with magnetic elements along a circumference of the rotor body.
  • a plurality of eccentric recesses is formed in the rotor body.
  • a rivet is inserted and pressed.
  • a method for balancing a rotor for a rotary machine comprises providing the rotor with at least one disk-shaped rotor body with magnetic elements along a circumference of the rotor body and a multiple rotor body. number of eccentric recesses in the rotor body, determining an imbalance of the rotor and then pressing at least one rivet in one of the eccentric recesses such that an imbalance of the rotor is at least partially compensated.
  • the rotor-forming mostly disc-shaped rotor body are designed accordingly that additional weights can be arranged for balancing directly in them.
  • the rotor bodies can be formed, for example, in the form of a circular disk or with another non-circular outer geometry, such as polygonal, flower-like, etc.
  • Such a disk-shaped rotor body usually carries magnetic elements, such as permanent magnets or electromagnets, along its circumference, so that an externally acting magnetic field in the engine operation, a torque on the rotor can exercise the rotor in rotation movement or in generator mode during rotation of the rotor, a changing magnetic field can generate a voltage in surrounding coils .
  • the magnetic elements can, for example, along the circumference of the rotor body on the lateral surface by means of suitable methods such as Sticking to be attached.
  • the magnetic elements may be arranged in a so-called buried manner within the rotor body, wherein in the rotor body in the vicinity of the outer periphery cavities are provided, in which the magnetic elements can be introduced and held therein.
  • a rotor can be formed with a single disk-shaped rotor body.
  • rotors are usually formed with a plurality of disc-shaped rotor bodies, wherein the individual rotor bodies are usually arranged along a rotation axis next to one another on a shaft and pressed with this.
  • eccentric recesses are formed in the rotor body. These eccentric recesses are arranged radially at a distance from the axis of rotation of the rotor body. They are designed so that additional mass can be absorbed in them, in this way the focus of the
  • a plurality of eccentric recesses is provided. For example, 8 or more, preferably 16 or more eccentric recesses may be provided.
  • the recesses may be formed along a concentric with the rotor body circle. In other words, the radial distance of all the recesses to the axis of rotation of the rotor body can be the same.
  • the recesses may be arranged equidistantly along the concentric circle.
  • the recesses in the rotor body are arranged and dimensioned such that their common center of gravity lies on the axis of rotation of the rotor body.
  • a rivet is arranged in at least one of the recesses provided in the rotor body or the plurality of rotor bodies.
  • a rivet is a plastically deformable, mostly substantially cylindrical element. ment. Rivet connections are conventionally used mostly for joining parts such as sheets and are standard components that can be provided in large quantities and thus manufactured at low cost.
  • Rivets can be provided in a variety of materials and configurations. For example, there are rivets of steel, copper, brass, aluminum alloys, plastic and titanium. There are solid rivets, blind rivets, punch rivets, semi-hollow rivets, etc. known.
  • the rivet can protrude beyond a surface of the component.
  • the rivet can be machined so that a protruding end of the rivet is formed into a so-called closing head, which rests against surfaces of the component and thus holds the rivet to the component.
  • the rivet can be processed in such a way that its shank arranged in the recess thickened, ie increases in diameter, so that an outer circumference of the rivet shank is firmly pressed against an inner circumference of the recess and the rivet is thus pressed into the recess.
  • Rivets can have the advantage over screws, that in the recesses in the component no thread needs to be introduced.
  • an insertion and fastening of the rivet is usually possible quickly and easily.
  • the rivet may initially have a smaller cross-section than the recess and thus be easily inserted into the recess. Then, the rivet can be braced with suitable tools in the recess and thus secured by its cross-section is increased. In the fastened state, the rivet is pressed into the recess in a force-fitting and / or form-fitting manner.
  • the rivet By introducing and pressing the rivet in the recess provided in the rotor body itself, the rivet can be reliably fixed in the rotor body. be taken. Since the rivet has its own weight, which is accommodated in the eccentric recess and can lead to an additional moment when the rotor rotates, a balancing of the entire rotor can be achieved with the aid of the pressed-in rivet.
  • the recesses in the rotor body are preferably arranged with respect to their positioning and formed with respect to their shape and arranged in at least one of the recesses at least one rivet is formed with respect to its shape and weight such that an imbalance of the totality of the rotor body and rivet is smaller as an imbalance of the rotor body alone. In other words, due to the rivet pressed into the recess, an imbalance of the rotor body can be reduced, wherein the shape, position and weight of the rivet can be adapted to the imbalance to be compensated.
  • an unbalance of the rotor without the rivet can first be determined, for example, by measurement or based on empirical values. Based on the determined imbalance, it can be analyzed how a suitable counter imbalance can be created by inserting rivets of appropriate weight in suitable locations in recesses within the rotor. In this way, a balancing of the rotor with a balancing quality of G 2.5 or even G 1 can be achieved.
  • the balancing quality can according to the
  • blind rivets As rivets to be introduced into the recesses so-called blind rivets can be used.
  • a blind rivet is a special form of rivet that only requires access to one side of the component to be riveted.
  • Blind rivet can be fixed with a special blind rivet.
  • the blind rivet in addition to the actual hollow rivet body with head on the front of a longer, elongated mandrel head with the rear rivet end, which is provided with a predetermined breaking point.
  • So-called magazine rivets do not have their own mandrel but the mandrel is integrated in the tool which can be used to fix the blind rivet.
  • Blind rivets are sometimes referred to as POP rivets. It needs not necessarily be provided at the rear end another head.
  • blind riveting is a joining process or press-fitting of only one, outer side of the component.
  • the blind rivet is inserted into the recess. leads. Subsequently, the protruding on the head mandrel is pulled out with a blind rivet. This leads to a compression and thus an expansion or increase in diameter of the rivet in the recess. At the end of the process, the mandrel typically breaks off at the predetermined breaking point within the rivet body and no longer protrudes from the rivet.
  • Blind rivets are manufactured for a wide variety of applications and are therefore manufactured in large quantities standard components that can be provided very inexpensively. The use of blind rivets for balancing a rotor therefore allows a very cost-effective balancing method.
  • Rotor body for fast rotating rotors permanently excited synchronous machines as used for example for electric and hybrid drive vehicles are often formed from a plurality of concentrically stacked lamella plates.
  • several thin sheets are stacked into a laminae package and joined together, for example by pressing.
  • the individual sheets can be easily brought into shape by punching operations.
  • the recesses into which buried magnets can be inserted, or the recesses, which, as described herein, are to receive the balancing rivets can be produced by punching out suitable areas from the slat plate.
  • a rivet also provided with an uneven surface can be introduced. Due to the uneven surface of both the recess and the rivet can lead to a positive connection of rivet and recess. Thus, a very good hold of the rivet is ensured in the recess.
  • a rivet with a special, uneven surface a rivet with a screw geometry can be used. Such rivets are also referred to as Rivscrew® rivets.
  • such helical rivets can stably mesh into the recesses within the laminae packages, also provided with an uneven surface, due to their "serrated" surface, despite slightly increased manufacturing costs for such helical rivets compared to simple blind rivets their use be justified because of the better grip.
  • the rivets often consist of a different material than the rotor body.
  • the recesses in which the rivets are to be arranged may have a spacing of at least 5 mm, preferably at least 7 mm of the magnetic elements to arrange.
  • the recesses may be located radially inside the magnet elements in the rotor body. Due to the sufficient distance of the recesses from the magnetic elements, a negative influence on the magnetic flux generated by the magnetic elements is avoided.
  • Fig. 1 shows a cross-sectional view of a balanced rotor for a rotary machine according to an embodiment of the present invention.
  • Fig. 2 shows a cross-sectional view of a balanced rotor for a rotary machine according to another embodiment of the present invention.
  • FIG 3 shows a plan view of a rotor body for a balanced rotor according to an embodiment of the present invention.
  • FIG. 4 shows an enlarged view of a recess for receiving a rivet in a rotor body for a rotor according to an embodiment of the present invention.
  • Fig. 1 shows a rotor 1 for a rotary machine such as an electric motor or a generator.
  • a plurality of disk packs 5 are arranged in a direction along a rotation axis 7 in succession and pressed with the shaft 3.
  • Each of the disk packs 5 consists of a plurality of stacked laminations 19.
  • the plurality of disk packs 5 together form a circular disk-shaped rotor body 9.
  • a plan view of an end face of the rotor body 9 is shown in FIG.
  • a plurality of magnetic elements 13 in the form of cuboid permanent magnets 15 are arranged.
  • the magnetic elements 13 are introduced in likewise cuboidal recesses 17 in the rotor body 9 and fixed in these by pressing or gluing.
  • a plurality of recesses 21 are further provided.
  • the recesses 21 are arranged at a certain distance s from the center of the rotor body, through which the axis of rotation 7 extends, and thus positioned eccentrically.
  • the recesses 21 are further spaced a distance d from the recesses 17 for the magnetic elements.
  • the rotor body 9 has an outer diameter of 83 mm.
  • the distance s of the recesses 21 from the center is 25 mm.
  • the distance d of the recesses 21 from the recesses 17 is 7 mm.
  • Each of the recesses 21 has a circular cross section with a diameter in the range of 1-5 mm.
  • a depth of the recess 21 in the direction parallel to the rotation axis 7 may be in the range of 5-20 mm.
  • blind rivets 23 can be introduced and pressed therein.
  • Rivets of suitable weight can then be pressed into a corresponding recess 21 at these positions.
  • the rivets can be provided with weights in the range of 0.1-2 g, preferably in the range of 0.35-1.5 g.
  • the additive balancing weight is provided in the form of a blind rivet 23.
  • the rivet is introduced from outside into the disk set 5 located in the figure on the left edge after assembly of the disk packs 5 on the shaft 3 and pressed.
  • the desired position of the balance weight is determined using a balancing system. If the weight of a single rivet is insufficient, a rivet can be additionally attached elsewhere.
  • RivscrewO rivets are used for this purpose. These RivscrewO rivets have a screw thread 33 on a lateral surface of the otherwise cylindrical shaft 31. As shown enlarged in FIG. 4, the disk packs 5 have a plurality of individual laminations 19. The recesses 21 are punched into the individual lamella plates 19 prior to the assembly of the lamella plates 19 to the plate packs 5. Due to manufacturing tolerances, there are regularly small deviations with regard to the position and size of the punched out areas.
  • rivet 23, 27 is shown in the figures, a plurality of rivets may be arranged in the rotor body 9. Although only one rivet is shown in a disk pack 5 at the extreme left edge of the rotor body 9, rivets can also be accommodated in a disk set at the extreme right edge or in disk packs 5 at both arranged on the opposite edges of the rotor body 9 disk packs 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un rotor équilibré et un procédé pour équilibrer le rotor d'une machine tournante, comme par exemple un moteur électrique. Le rotor (1) comporte au moins un corps (9) en forme de disque qui comporte des éléments aimants (13) dans sa zone périphérique extérieure (11). Une pluralité d'évidements excentriques (21) sont ménagés dans le corps (9) de rotor. Afin d'équilibrer ce corps (9), un rivet (23), se présentant par exemple sous la forme d'un rivet aveugle ou d'un rivet Rivscrew®, peut être introduit et enfoncé dans un ou plusieurs de ces évidements (21). Le rivet (23) est directement introduit dans le corps (9). Il n'est pas nécessaire d'avoir recours à un disque annulaire d'équilibrage supplémentaire, ce qui permet un équilibrage simple, peu coûteux et fiable du rotor.
EP11740888.0A 2010-09-29 2011-07-28 Rotor équilibré pour machine tournante et procédé pour équilibrer un rotor Withdrawn EP2622720A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010041599A DE102010041599A1 (de) 2010-09-29 2010-09-29 Gewuchteter Rotor für eine Rotationsmaschine und Verfahren zum Auswuchten eines Rotors
PCT/EP2011/063014 WO2012052202A2 (fr) 2010-09-29 2011-07-28 Rotor équilibré pour machine tournante et procédé pour équilibrer un rotor

Publications (1)

Publication Number Publication Date
EP2622720A2 true EP2622720A2 (fr) 2013-08-07

Family

ID=44629723

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11740888.0A Withdrawn EP2622720A2 (fr) 2010-09-29 2011-07-28 Rotor équilibré pour machine tournante et procédé pour équilibrer un rotor

Country Status (5)

Country Link
US (1) US20130257189A1 (fr)
EP (1) EP2622720A2 (fr)
CN (1) CN103222163A (fr)
DE (1) DE102010041599A1 (fr)
WO (1) WO2012052202A2 (fr)

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US20140097711A1 (en) * 2012-10-05 2014-04-10 Larry Kubes One piece rotor hub/shaft for an electric machine and method
EP2740966B1 (fr) * 2012-12-05 2020-02-05 Siemens Aktiengesellschaft Procédé destiné à l'équilibrage d'un composant
JP6273817B2 (ja) * 2013-12-13 2018-02-07 株式会社デンソー 回転電機およびその製造方法
DE102014215275A1 (de) * 2014-08-04 2016-02-04 Volkswagen Aktiengesellschaft Verfahren zur Verringerung oder Beseitigung von Unwuchten elektrischer Maschinen
FR3035552B1 (fr) * 2015-04-23 2019-05-24 IFP Energies Nouvelles Machine electrique et procede pour l'equilibrage dynamique du rotor de cette machine electrique.
DE102016209435A1 (de) 2016-05-31 2017-11-30 Volkswagen Aktiengesellschaft Rotor für eine Elektromaschine, insbesondere für den Hybridantrieb eines Kraftfahrzeugs bzw. Verfahren zur Herstellung des zuvor genannten Rotors bzw. Elektromaschine mit dem zuvor genannten Rotor
JP6597547B2 (ja) * 2016-10-11 2019-10-30 トヨタ自動車株式会社 回転電機ロータの製造方法
CN106787533A (zh) * 2016-12-21 2017-05-31 上海电气集团上海电机厂有限公司 一种超高速异步电动机的转子动平衡调试方法
DE102018203214A1 (de) * 2018-03-05 2019-09-05 MTU Aero Engines AG Auswuchten eines rotationssymmetrischen Bauteils, insbesondere Rotorbauteils
JP2019176579A (ja) * 2018-03-27 2019-10-10 マブチモーター株式会社 回転子および回転電機
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Also Published As

Publication number Publication date
WO2012052202A3 (fr) 2013-05-02
CN103222163A (zh) 2013-07-24
DE102010041599A1 (de) 2012-03-29
WO2012052202A2 (fr) 2012-04-26
US20130257189A1 (en) 2013-10-03

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