EP0778641A2 - Procédé de renouvellement des bagues collectrices - Google Patents

Procédé de renouvellement des bagues collectrices Download PDF

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Publication number
EP0778641A2
EP0778641A2 EP96810781A EP96810781A EP0778641A2 EP 0778641 A2 EP0778641 A2 EP 0778641A2 EP 96810781 A EP96810781 A EP 96810781A EP 96810781 A EP96810781 A EP 96810781A EP 0778641 A2 EP0778641 A2 EP 0778641A2
Authority
EP
European Patent Office
Prior art keywords
slip ring
slip
rings
smaller
slip rings
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Withdrawn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
EP96810781A
Other languages
German (de)
English (en)
Inventor
Werner Haditsch
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.)
ABB Asea Brown Boveri Ltd
ABB AB
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Publication of EP0778641A2 publication Critical patent/EP0778641A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/14—Maintenance of current collectors, e.g. reshaping of brushes, cleaning of commutators

Definitions

  • the invention relates to a method for renewing slip rings of synchronous machines.
  • Slip rings from synchronous machines usually consist of steel rings arranged in pairs. They are either shrunk onto a slip ring sleeve or shrink-wrapped onto the rotor shaft (cf. Wiedemann / Kellenberger "Construction of Electrical Machines", Springer-Verlag Berlin, Heidelberg, New York 1967, pages 392, 393).
  • Slip rings of high-speed machines are inevitably subject to wear. Their replacement is comparatively complex.
  • the invention is based on the object of specifying a method for renewing slip rings which is simple to carry out on the one hand and on the other hand increases the service life and the current transmission properties of the slip rings.
  • two slip rings made of steel 1, 2 are insulated on the shaft 5 with the interposition of insulating foils 3, 4, e.g. shrunk.
  • the electrical connection to the excitation lead bolts arranged in a shaft bore has been omitted in the drawing for reasons of simplification; it also corresponds to the state of the art, as it is derived, for example, from the book by Wiedemann / Kellenberger cited above. results.
  • slip rings are subject to wear, they have to be replaced at certain intervals. So far, the slip rings 1, 2 have been heated to several hundred degrees Celsius for this purpose and then pulled off towards the NS shaft end. Before pulling on new slip rings, the insulating foil 3, 4 which had been damaged during pulling off was replaced.
  • the existing slip rings 1, 2 are not removed, but are turned to a radius r, which is smaller by the thickness d (typically 30 mm) of the new slip ring 6 or 7 than the nominal outer radius r N of the slip ring.
  • the previous slip rings now form quasi slip ring bushings 8, 9 for the slip rings 6, 7 to be newly fitted.
  • the slip rings to be newly assembled consist of a hardenable copper alloy with alloy additives of Ni or Be.
  • An alloy which is commercially available under the name HOVADUR CuNiBe from Schmelzmetall AG, CH-6482 Gurtnellen / Uri has proven to be particularly advantageous (data sheet HOVADUR CuNiBe, undated).
  • This copper alloy has alloy additions of approximately 1.8% Ni and approximately 0.4% Be. Even in the hardened "normal state", it exhibits high hardness and heat resistance with good electrical and thermal conductivity.
  • this alloy is also available in tempered form and in a so-called "special condition". In this delivery form, this alloy achieves strength values that correspond to those of steel. However, their electrical and thermal conductivity corresponds to that of copper
  • the new slip rings 6, 7 are heated to approx. 200 ° C. and mounted on the slip ring bushes 8 and 9, respectively (see Fig. 2). When cooling, the high modulus of elasticity and the high yield strength of the copper alloy result in an optimal shrink fit that can withstand all operational stresses.
  • the newly fitted slip rings 6, 7 are then turned to nominal radius r N.
  • Slip rings of medium and large turbogenerators have an axial width on the order of 200 to 400 mm.
  • Narrow rings made of the said copper alloy - they are normally made from a blank in a forging process - are more economical to produce than wide rings; they are also easier to handle during assembly. For this reason it is advisable to use the (new) slip ring to be formed from a plurality of individual rings 6a, 6b or 7a, 7b of the same type, as shown in FIG. 3 for a slip ring consisting of two individual rings.
  • the shrink surfaces on the two slip ring bushes 8, 9 and, accordingly, the associated shrink surfaces on the inner circumference of the slip rings 6 and 7 are graded.
  • the respective radii are designated r 1 , r 2 , r 3 and r 4 , where r 1 > r 2 > r 3 > r 4 applies in order to be able to slip the inner slip ring 7 over the outer slip ring sleeve 8.
  • This gradation results in an additional securing of the slip rings 6, 7 in the axial direction and also makes assembly easier, because the gradation means that an axial stop when mounting is available.
  • the embodiment according to FIG. 4 can also be transferred to individual rings 6a, 6b or 7a, 7b, as illustrated in FIG. 5.
  • the individual rings 6a, 6b and 7a, 7b each sit on stepped shrink surfaces with the radii r 1 , r 2 , r 3 and r 4 , where again r 1 > r 2 > r 3 > r 4 .
  • the invention is of course not limited to the replacement of slip rings shrunk directly onto the rotor shaft. It can of course also be used for slip ring arrangements in which the steel slip rings are shrunk onto a slip ring sleeve or onto a pre-shrink ring, as is shown, for example, in the book by Wiedemann / Kellenberger mentioned on page 392 in Fig. 386 and Fig. 388.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • General Factory Administration (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
  • Control Of Heat Treatment Processes (AREA)
  • Motor Or Generator Current Collectors (AREA)
EP96810781A 1995-12-04 1996-11-13 Procédé de renouvellement des bagues collectrices Withdrawn EP0778641A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19545142A DE19545142A1 (de) 1995-12-04 1995-12-04 Verfahren zur Erneuerung von Schleifringen
DE19545142 1995-12-04

Publications (1)

Publication Number Publication Date
EP0778641A2 true EP0778641A2 (fr) 1997-06-11

Family

ID=7779121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810781A Withdrawn EP0778641A2 (fr) 1995-12-04 1996-11-13 Procédé de renouvellement des bagues collectrices

Country Status (8)

Country Link
EP (1) EP0778641A2 (fr)
JP (1) JPH09180852A (fr)
CN (1) CN1165417A (fr)
CA (1) CA2191933A1 (fr)
DE (1) DE19545142A1 (fr)
HR (1) HRP960562A2 (fr)
PL (1) PL317305A1 (fr)
ZA (1) ZA969671B (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101823156B (zh) * 2009-03-05 2011-12-07 鞍钢股份有限公司 变频同步电机励磁集电环带电车削方法
CN102205424A (zh) * 2010-03-31 2011-10-05 上海宝钢设备检修有限公司 同步轧机转轴滑环的在线车削方法
CN104196750B (zh) * 2014-09-01 2016-05-18 青蛙泵业有限公司 一种深井泵转子长轴及其加工工艺
CN111682714B (zh) * 2020-05-28 2021-04-30 三立（厦门）汽车配件有限公司 一种电机转子滑环维修工艺
US11594943B2 (en) 2021-07-14 2023-02-28 Andritz Hydro Corp. In place machining of collector ring

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE285525C (fr) *
DE249731C (fr) *
US2198395A (en) * 1938-07-18 1940-04-23 Harry B Spear Collector ring
DE903944C (de) * 1944-08-30 1954-02-11 Siemens Ag Schleifringsatz
CH308105A (de) * 1951-07-10 1955-06-30 Siemens Ag Kontaktvorrichtung mit unter Federdruck stehenden Kontaktsegmenten für ein stiftartiges Schaltglied.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
CA2191933A1 (fr) 1997-06-05
HRP960562A2 (en) 1997-08-31
CN1165417A (zh) 1997-11-19
PL317305A1 (en) 1997-06-09
JPH09180852A (ja) 1997-07-11
DE19545142A1 (de) 1997-06-05
ZA969671B (en) 1997-06-12

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