CN103427527A - Fixing method of 600MW steam-turbine generator stator coil end - Google Patents
Fixing method of 600MW steam-turbine generator stator coil end Download PDFInfo
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- CN103427527A CN103427527A CN2013103843391A CN201310384339A CN103427527A CN 103427527 A CN103427527 A CN 103427527A CN 2013103843391 A CN2013103843391 A CN 2013103843391A CN 201310384339 A CN201310384339 A CN 201310384339A CN 103427527 A CN103427527 A CN 103427527A
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Abstract
The invention relates to a fixing method of a 600MW steam-turbine generator stator coil end. According to the method, technological innovation is performed on fixing of the stator coil end, a traditional method of rope binding is broken through, the fixing structure of a large-size overall glass fiber reinforced plastics conical ring, adjustable binding rings and a nose radial bracing ring is adopted, and meanwhile a rigid-flexible fixing structure which is formed at the whole stator coil end and firmly fixed in the radial direction and the tangential direction and is retractable in the axial direction through connection between a non-magnetic spring plate and a stator core end. When a generator operates or breaks down suddenly, a coil bar expands or contracts in the axial direction due to temperature changes, the stator coil end can expand and contract in the axial direction overall, so that thermal stress in coil insulation is effectively slowed down, and the generator is adapted to peak load operation conditions. In the stator coil end fixing structure, all fasteners making contact with a coil are made of non-metallic materials, so that the phenomena of local overheating and point discharge caused by the adoption of metallic materials are avoided.
Description
Technical field:
The invention belongs to the turbo-generator manufacturing technology field, relate in particular to a kind of 600MW turbogenerator stator winding end portion fixing means.
Background technology:
Turbogenerator stator winding end portion Electric Field Distribution more complicated, and winding overhang similar cantilever beam structurally, within inner minute, compare and be difficult for fixing with slot for winding, therefore when normal operation or catastrophic failure, the end winding insulation temperature raise and huge electrodynamic effect under easily damage, further develop and will cause the winding shorted to earth and make burn-down of electric motor.Fact proved, the a large amount of accident of generator comes from temperature shock and the vibration of its end winding, so, because of end winding vibration and the excessive phase fault that causes insulation harm to cause burst of variations in temperature or shorted to earth accident, on the basis of traditional Generator Stator Winding Ends technique for fixing, developed the present invention for preventing generator.
Summary of the invention:
For the problems referred to above, the present invention is by adopting the radially fixed structure of stretching ring of large scale whole glass steel conical ring, adjustable colligation ring, nose, by nonmagnetic latch plate, with End zone of stator core, be connected simultaneously, the end of whole stator winding forms radially and tangential fixation, vertically telescopic just-gentle fixed structure, be nonmetallic materials with the contacted all securing members of winding, greatly reduced the probability had an accident.
The technical scheme that the present invention takes is: the Stator End Winding outside adopts the support component of large scale whole glass steel conical ring as carrying 600MW turbine generator stator end winding, and large scale whole glass steel conical ring is fixed in stator core by nonmagnetic latch plate, Stator End Winding is inboard adopts the adjustable colligation ring of twice near stator core to reach the nose fixed structure that radially the stretching ring forms away from stator core, when generator operation or catastrophic failure, while due to variations in temperature, causing the axial breathing of line rod, stator winding end integral body can be stretched vertically, nose radially stretching ring is used for supporting and end, location winding nose, securing member is made by nonmetallic materials, stator winding end is fixed on to large scale whole glass steel conical ring and adjustable colligation ring, nose is radially between the stretching ring.
The winding outside, end of the present invention adopts large scale whole glass steel conical ring.Fiberglass has good insulation property and mechanical performance, and the conical ring of being made by fiberglass further highlights its outstanding mechanical performance.So, the present invention adopts the support component of large scale whole glass steel conical ring as carrying 600MW turbine generator stator end winding in the end winding outside, when unit operation or burst accident, can give the end winding support force, avoid becoming excessive the damage because excessive electric stress causes end line clavate.The fiberglass conical ring is connected with End zone of stator core by nonmagnetic latch plate simultaneously, has guaranteed the fastness of fiberglass conical ring self.
Technique effect of the present invention is as follows:
(1) novel firm-gentle fixed structure.
Adopted the radially fixed structure of stretching ring of large scale whole glass steel conical ring, adjustable colligation ring, nose in the stator winding end fixed structure, with End zone of stator core, be connected by nonmagnetic latch plate simultaneously, the end of whole stator winding forms radially and tangential fixation, vertically telescopic just-fixed structure softens.When generator operation or catastrophic failure, while due to variations in temperature, causing the axial breathing of line rod, stator winding end integral body can be stretched vertically, thereby has effectively slowed down the thermal stress in the winding insulation, and makes generator adapt to the peaking operation operating mode.
(2) novel fastener material.
When unit operation, the stator winding end induction produces complicated electromagnetic field, and can there be higher some position in winding surface, end, if each ring of end winding and all fixtures adopt metal material, electric discharge phenomena will certainly occur.In stator winding end fixed structure of the present invention, use nonmetallic materials with the contacted all securing members of winding, avoid local overheating and point discharge phenomenon because using metal material to bring.
The accompanying drawing explanation:
Fig. 1 is fixedly schematic diagram of 600MW turbogenerator stator winding end portion.In figure, sequence number is with corresponding with lower component:
1 stator winding end
2 noses are the stretching ring radially
3 securing members
4 adjustable colligation rings
5 stator cores
6 large scale whole glass steel conical rings
7 nonmagnetic latch plates
Embodiment:
As shown in Figure 1, the present invention is a kind of 600MW turbogenerator stator winding end portion fixing means: Stator End Winding 1 outside adopts the support component of large scale whole glass steel conical ring 6 as carrying 600MW turbine generator stator end winding 1, when unit operation or burst accident, can give the end winding support force, and large scale whole glass steel conical ring 6 is fixed in stator core 5 by nonmagnetic latch plate 7, guaranteed the fastness of fiberglass conical ring self.The inboard employing near the adjustable colligation ring 4 of the twice of stator core 5 of Stator End Winding 1 reaches the nose fixed structure that radially stretching ring 2 forms away from stator core 5, when generator operation or catastrophic failure, while due to variations in temperature, causing the axial breathing of line rod, stator winding end integral body can be stretched vertically, thereby has effectively slowed down the thermal stress in the winding insulation.Nose is stretching ring 2 radially, and for supporting and end, location winding nose, while guaranteeing to cause the axial breathing of line rod due to variations in temperature, nose is tangentially flexible.Securing member 3 is made by nonmetallic materials, has good mechanical performance and electric property, by stator winding end 1 tightly be fixed on large scale whole glass steel conical ring 6 and adjustable colligation ring 4, nose radially between stretching ring 2.
Claims (1)
1. a 600MW turbogenerator stator winding end portion fixing means is characterized in that:
Stator End Winding (1) outside adopts the support component of large scale whole glass steel conical ring (6) as carrying 600MW turbine generator stator end winding (1), and large scale whole glass steel conical ring (6) is fixed in stator core (5) by nonmagnetic latch plate (7), Stator End Winding (1) is inboard adopts the adjustable colligation rings of twice (4) near stator core (5) to reach the nose fixed structure that radially stretching ring (2) forms away from stator core (5), when generator operation or catastrophic failure, while due to variations in temperature, causing the axial breathing of line rod, stator winding end integral body can be stretched vertically, nose radially stretching ring (2) for supporting and end, location winding nose, securing member (3) is made by nonmetallic materials, stator winding end (1) is fixed on to large scale whole glass steel conical ring (6) and adjustable colligation ring (4), nose is radially between stretching ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103843391A CN103427527A (en) | 2013-08-29 | 2013-08-29 | Fixing method of 600MW steam-turbine generator stator coil end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103843391A CN103427527A (en) | 2013-08-29 | 2013-08-29 | Fixing method of 600MW steam-turbine generator stator coil end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103427527A true CN103427527A (en) | 2013-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103843391A Pending CN103427527A (en) | 2013-08-29 | 2013-08-29 | Fixing method of 600MW steam-turbine generator stator coil end |
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| CN (1) | CN103427527A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017184527A (en) * | 2016-03-31 | 2017-10-05 | 株式会社東芝 | Rotary electric machine and manufacturing method thereof |
| CN109217524A (en) * | 2018-11-07 | 2019-01-15 | 哈尔滨电机厂有限责任公司 | A kind of combination variation rigidity stator end supporting structure |
| JP2019033652A (en) * | 2017-08-10 | 2019-02-28 | トヨタ自動車株式会社 | Rotary electric machine stator |
| US10468931B2 (en) | 2016-12-01 | 2019-11-05 | General Electric Company | Generator connection ring support device |
| CN112968576A (en) * | 2021-04-13 | 2021-06-15 | 哈尔滨电机厂有限责任公司 | Turbine generator stator end nose end loosening treatment process method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969844A (en) * | 2012-12-26 | 2013-03-13 | 哈尔滨电气动力装备有限公司 | Process for binding and fixing end part of stator winding of large-size AC (Alternate Current) motor |
-
2013
- 2013-08-29 CN CN2013103843391A patent/CN103427527A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969844A (en) * | 2012-12-26 | 2013-03-13 | 哈尔滨电气动力装备有限公司 | Process for binding and fixing end part of stator winding of large-size AC (Alternate Current) motor |
Non-Patent Citations (3)
| Title |
|---|
| 焦晓霞: "《百度文库(http://wenku.baidu.com/view/b636ced1c1c708a1284a4453.html)》", 27 May 2012 * |
| 王玉田等: "大型汽轮发电机定子绕组端部固定方法", 《大电机技术》 * |
| 田开谟等: "60万千瓦汽轮发电机玻璃钢锥环的研制", 《纤维复合材料》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017184527A (en) * | 2016-03-31 | 2017-10-05 | 株式会社東芝 | Rotary electric machine and manufacturing method thereof |
| US10468931B2 (en) | 2016-12-01 | 2019-11-05 | General Electric Company | Generator connection ring support device |
| JP2019033652A (en) * | 2017-08-10 | 2019-02-28 | トヨタ自動車株式会社 | Rotary electric machine stator |
| CN109217524A (en) * | 2018-11-07 | 2019-01-15 | 哈尔滨电机厂有限责任公司 | A kind of combination variation rigidity stator end supporting structure |
| CN112968576A (en) * | 2021-04-13 | 2021-06-15 | 哈尔滨电机厂有限责任公司 | Turbine generator stator end nose end loosening treatment process method |
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Application publication date: 20131204 |