EP3180837A1 - Corps de rotor pour une machine électrique tournante - Google Patents

Corps de rotor pour une machine électrique tournante

Info

Publication number
EP3180837A1
EP3180837A1 EP15774919.3A EP15774919A EP3180837A1 EP 3180837 A1 EP3180837 A1 EP 3180837A1 EP 15774919 A EP15774919 A EP 15774919A EP 3180837 A1 EP3180837 A1 EP 3180837A1
Authority
EP
European Patent Office
Prior art keywords
rotor
bale
groove
axial
section
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Withdrawn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
EP15774919.3A
Other languages
German (de)
English (en)
Inventor
Christian Jäkel
Matthias Kowalski
Omer Mrkulic
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 AG
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP3180837A1 publication Critical patent/EP3180837A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors

Definitions

  • the invention relates to a rotor bale for a rotor of a rotating electric machine, comprising a plurality of circumferentially distributed, axially extending rotor teeth, between which axially extending receiving grooves for receiving in each case a conductor portion of a rotor winding of the rotor are arranged.
  • the invention relates to a rotating electrical ⁇ specific machine, in particular a turbogenerator, comprising a stator and a rotor having at least one Rotorbal ⁇ len.
  • a rotary electric machine comprises a stator and a rotatably mounted rotor.
  • the rotor may have a rotor bale with axial receiving grooves, in each of which a conductor section of a rotor winding of the rotor is arranged.
  • the conductor sections arranged in the receiving grooves are electrically conductively connected to one another at the end outside the rotor bale via cross conductor sections which in each case form a rotor winding head on axially opposite sides of the rotor bale.
  • a rotor winding head can be at least partially enclosed with another rotor component, for example a rotor cap, for its mechanical support. In this way, it can be prevented that the rotor winding head deforms during operation of a rotating electrical machine due to centrifugal forces acting on it.
  • another rotor component for example a rotor cap
  • the object of the invention is to provide a more effective cooling of a winding head of a rotor of a rotating electrical machine.
  • the rotor bale according to the invention for a rotor of a rotating electric machine comprises a plurality of circumferentially distributed, axially extending rotor teeth, between which axially extending receiving grooves for receiving in each case a conductor portion of a rotor winding of the rotor angeord ⁇ net, wherein at least one radial side wall of at least one Rotor tooth at least one groove is arranged, the at least one axial groove portion which extends from an end face of the rotor bale at least partially axially over a predetermined portion of the rotor bale he ⁇ stretches, and at least one communicatively connected to the axial groove portion radial groove portion extending from the axial Groove portion extends at least partially radially to an outer circumferential surface of the rotor bale has.
  • the groove on the radial side surface of the rotor tooth is arranged on a rotor tooth instead of a conventional borrowed axial and central tooth bore, which is a cooling passage with a wall portion of a radial side wall disposed in the groove adjacent to the receiving groove conductor portion or an electrical insulation disposed thereon for guiding a cooling fluid is formed.
  • a conventional borrowed axial and central tooth bore which is a cooling passage with a wall portion of a radial side wall disposed in the groove adjacent to the receiving groove conductor portion or an electrical insulation disposed thereon for guiding a cooling fluid is formed.
  • a cooling fluid conducted through a cooling passage formed by the groove and a portion of the radial side wall of the conductor portion disposed in a groove adjacent the groove comes into direct contact with the conductor portion and the electrical insulation disposed thereon according to the invention. thereby providing more effective cooling of the conductor portion than when using a conventional axia- len tooth bore, wherein the cooling fluid finally comes out ⁇ with the rotor tooth in immediate contact and thus only cools an adjacent conductor portion ⁇ telbar.
  • a flow of cooling fluid through the groove or a cooling channel formed therewith is generated by acting on the cooling fluid in the cooling channel in the operation of a suitably equipped Rotie ⁇ leaders electric machine centrifugal forces.
  • a fan may be upstream or downstream to a for cooling a rotor winding head optima ⁇ len volume flow of the cooling fluid limpzustel ⁇ len through the groove.
  • Two or more corresponding grooves can also be arranged on the radial side wall of the rotor tooth.
  • the Wenig ⁇ least one groove may also have two or more axial Nutab ⁇ sections and / or radial groove portions.
  • Insbeson ⁇ particular may be two or more radially spaced-apart axial groove portions communicatively connected to a single radial groove portion.
  • a single axial groove portion communicating with two or more axially spaced apart radial groove portions may be connected.
  • It can also be The radial side surfaces of a rotor tooth each least ⁇ least a corresponding groove may be arranged.
  • a corresponding groove can be arranged on one or both radial side walls of each rotor tooth in order to achieve maximum cooling of a rotor winding head.
  • the axial groove portion may be connected at an angle or via a rounding communicating with the radial groove portion.
  • the latter is associated with a lower flow resistance of the groove, which allows a larger volume flow of the cooling fluid through the groove or a cooling channel formed therewith, which in turn makes more effective cooling of a rotor ⁇ winding over possible.
  • the rotating electrical machine may be, for example, a turbogenerator.
  • the predetermined section of the rotor bale is preferably formed shorter than one half of an axial length of the rotor bale. This allows a cooling fluid, which already
  • the cooling effect of a correspondingly positioned ⁇ warmed cooling fluid with respect to a cooling of the rotor body and arranged on said conductor portions is very limited, making an arrangement of the groove on a partial section of the rotor body, which is longer than half the axial length of the rotor body, unnecessary.
  • the predetermined Operaab ⁇ section of the rotor bale, on which the groove is arranged, may be shorter than a third, a quarter or a fifth of the axi ⁇ alen length of the rotor bale or even shorter.
  • the groove is disposed on a radially outer wall half of the radial side wall of the rotor tooth. This can that in the groove or a cooling channel formed thereon at a front side of the rotor bale inflowing cooling fluid along the arranged in this radially outer region conductor portions of the rotor bale front end winding head are passed to the winding head optimally küh ⁇ len can.
  • the groove may be arranged on a radially outer third of the side wall of the rotor tooth or even further radially outward.
  • the groove is preferably formed in cross section at least partially circular segment-shaped.
  • the groove cross-section may be at least partially semi-circular, rounded or otherwise be formed ⁇ poly gonal. At least one groove section preferably runs in a straight line.
  • This embodiment is associated with a reduction of the flow resistance of the groove, whereby a larger volume flow of the cooling fluid through the groove or a cooling channel formed therewith can flow, which allows more effective cooling of a rotor winding head. It may also run both the axial and radial groove straight ⁇ linig.
  • the rotary electric machine according to the invention in particular turbo-generator, comprises a stator and a rotor with at least one rotor ball, wherein the rotor ball is formed according to one of the aforementioned embodiments or any combination thereof.
  • FIG. 1 shows a schematic and perspective illustration of a section of an exemplary embodiment of a rotor bale according to the invention.
  • FIG. 1 shows a schematic and perspective illustration of a section of an exemplary embodiment of a rotor bale 1 according to the invention for a rotor of a rotating electrical machine which is not shown further.
  • the rotor bale 1 comprises a plurality of circumferentially distributed angeord ⁇ designated, axially extending rotor teeth 2, between which axially extending receiving grooves 3 are arranged for receiving one of a plurality of sub-conductors 4 formed conductor portion 5 a not further shown rotor winding of the rotor.
  • the conductor sections 5 are cut represents ⁇ . They continued in Figure 1 right to form a not shown, to be cooled rotor winding head of the rotor on, which is not shown in detail for clarity.
  • Each conductor section 5 is surrounded by an electrical insulation 6, which is also arranged between the sub-conductors 4.
  • Each receiving groove 3 comprises radially inwardly a groove base channel 7, through which a cooling fluid for cooling the respectively arranged in the receiving groove 3 conductor portion 5 can be performed.
  • Each receiving groove 3 is closed radially on the outside, each with a slot closure wedge 8.
  • At each slot closure wedge 8 at least one radial bore 9 is arranged through which a guided through an axial cooling passage 10 at the respective conductor portion 5 cooling fluid can be passed radially outward.
  • At each radial side wall of each rotor tooth 2 Ltds ⁇ least one groove 11 is arranged, wherein the groove 11 is disposed on a radially outer wall half of the radial side wall of the respective rotor tooth 2.
  • the groove 11 includes a straight ⁇ linear extending axial groove portion 12 which extends from an end face 13 of the rotor bale 1 axially over a pre ⁇ given portion of the rotor bale 1. Furthermore, the groove 11 comprises a communicating with the axi ⁇ alen groove portion 12 connected, rectilinear radial groove portion 14 which extends from the axial Nutab- section 12 radially to an outer circumferential surface 15 of the Rotorbal ⁇ lens 1.
  • the predetermined section of the Rotorbal ⁇ lens 1 is formed significantly shorter than a quarter of an axial length of the rotor bale 1.
  • the groove portions 12 and 14 are formed in cross-section circular segment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Windings For Motors And Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un corps de rotor pour un rotor d'une machine électrique tournante, comportant plusieurs dents de rotor, s'étendant axialement et disposées de manière répartie sur le pourtour, entre lesquelles sont disposées des encoches de réception s'étendant axialement et destinées à la réception de respectivement un secteur conducteur d'un bobinage du rotor. Au niveau d'au moins une paroi latérale radiale d'au moins une dent de rotor est disposée une encoche, qui comporte au moins un secteur axial d'encoche, qui s'étend d'une face frontale du corps de rotor au moins en partie axialement au-delà d'un secteur partiel prédéfini du corps de rotor, et au moins un secteur radial d'encoche, qui est relié de manière communiquante au secteur axial d'encoche et qui s'étend du secteur axial d'encoche au moins en partie de manière radiale vers une surface d'enveloppe externe du corps de rotor.
EP15774919.3A 2014-10-15 2015-10-05 Corps de rotor pour une machine électrique tournante Withdrawn EP3180837A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14188949.3A EP3010117A1 (fr) 2014-10-15 2014-10-15 Corps de rotor pour une machine électrique rotative
PCT/EP2015/072903 WO2016058854A1 (fr) 2014-10-15 2015-10-05 Corps de rotor pour une machine électrique tournante

Publications (1)

Publication Number Publication Date
EP3180837A1 true EP3180837A1 (fr) 2017-06-21

Family

ID=51730384

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14188949.3A Withdrawn EP3010117A1 (fr) 2014-10-15 2014-10-15 Corps de rotor pour une machine électrique rotative
EP15774919.3A Withdrawn EP3180837A1 (fr) 2014-10-15 2015-10-05 Corps de rotor pour une machine électrique tournante

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14188949.3A Withdrawn EP3010117A1 (fr) 2014-10-15 2014-10-15 Corps de rotor pour une machine électrique rotative

Country Status (5)

Country Link
US (1) US20170310178A1 (fr)
EP (2) EP3010117A1 (fr)
JP (1) JP2017531419A (fr)
CN (1) CN107078576A (fr)
WO (1) WO2016058854A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111786487A (zh) * 2020-08-05 2020-10-16 广州广重企业集团有限公司 一种电机转子冷却槽结构
CN111786486A (zh) * 2020-08-05 2020-10-16 广州广重企业集团有限公司 一种电机转子内冷结构

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS599741U (ja) * 1982-07-07 1984-01-21 三菱電機株式会社 回転電機の回転子鉄心

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5143304U (fr) * 1974-09-26 1976-03-31
JPS54139004A (en) * 1978-04-19 1979-10-29 Hitachi Ltd Air wedge for rotor of rotary machine
JPS56139335U (fr) * 1980-03-22 1981-10-21
JPS58145056U (ja) * 1982-03-23 1983-09-29 株式会社日立製作所 回転電機の回転子
JPS6158837U (fr) * 1984-09-18 1986-04-21
US5329197A (en) * 1992-10-29 1994-07-12 General Electric Company Generator rotor winding with two coils per slot
JPH0951644A (ja) * 1995-08-04 1997-02-18 Hitachi Ltd 回転電機の回転子
JP2001086679A (ja) * 1999-09-17 2001-03-30 Hitachi Ltd 回転電機
US6844637B1 (en) * 2003-08-13 2005-01-18 Curtiss-Wright Electro-Mechanical Corporation Rotor assembly end turn cooling system and method
WO2014097416A1 (fr) * 2012-12-19 2014-06-26 三菱電機株式会社 Machine électrique rotative

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS599741U (ja) * 1982-07-07 1984-01-21 三菱電機株式会社 回転電機の回転子鉄心

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2016058854A1 *

Also Published As

Publication number Publication date
CN107078576A (zh) 2017-08-18
JP2017531419A (ja) 2017-10-19
WO2016058854A1 (fr) 2016-04-21
EP3010117A1 (fr) 2016-04-20
US20170310178A1 (en) 2017-10-26

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