CN101577470A - Manufacturing process of stator bar of turbo generator - Google Patents
Manufacturing process of stator bar of turbo generator Download PDFInfo
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- CN101577470A CN101577470A CNA2009100722543A CN200910072254A CN101577470A CN 101577470 A CN101577470 A CN 101577470A CN A2009100722543 A CNA2009100722543 A CN A2009100722543A CN 200910072254 A CN200910072254 A CN 200910072254A CN 101577470 A CN101577470 A CN 101577470A
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Abstract
The invention relates to a manufacturing process of a stator bar of a turbo generator: thermoforming is conducted to a wire; an insulation layer is trimmed off from the center to two ends of the small surface of a conductor; bare copper is exposed; the stator bar consists of an upper bar and a lower bar; an exposed copper point is trimmed at 88mm interval from point A to point B on the upper bar; an exposed copper point is trimmed at 176mm interval from point C to point D on the upper bar; an exposed copper point is trimmed at 102.7mm interval from point E to point F on the lower bar; an exposed copper point is trimmed at 205.4mm interval from point G to point H on the lower bar; the length of an equipotential layer is 9210mm, within which a layer of conducting paint is evenly coated and a low-resistance anti-corona belt is wound parallelly; and the equipotential layer is finished. The 1000MW and 27kV-rated voltage turbo generator stator bar manufactured by the process has particular electric field distribution characteristics and insulating property in that the insulation thickness is 6.2mm, the breakdown voltage of the bar reaches 6 times of the rated voltage, the breakdown field strength reaches 27.4kV/mm and the service life under the voltage of 2.0Un reaches 469h, which reaches advanced world level.
Description
Technical field:
The present invention relates to a kind of manufacturing process of stator bar of turbo generator.
Background technology:
In recent years, big electric manufacturing development both at home and abroad is very fast, and especially the generating equipment single-machine capacity increases rapidly.Along with the increase of single-machine capacity, the also corresponding raising of generator rated voltage, the turbo generator ceiling voltage reaches 27kV.Increasing of the growth of generator single-machine capacity and rated voltage proposed new requirement to big coil of stator of motor Main Insulation Structure of Electric.Under 20kV, general stator bar breakdown potential pressure energy reaches 5 times of rated voltage, 2.0Un voltage 1100h of following life-span in 600MW, electric pressure for the technology of present domestic institute extensive use, the turbo generator capacity of manufacturing.External stator winding conductor bars in electrical machines puncture voltage advanced level has reached 6 times of rated voltage, and the integrated water product are very high.Because domestic also do not have a 1000MW stator bar manufacturing technology, the domestic 1000MW motor of will making can only be used the import stator bar now, and the motor manufacturing cost is quite high.The manufacturing capacity reaches 1000MW, electric pressure is the turbo generator of 27kV, and using traditional structure is the conductor bight electric field concentration problem that can't resolve this motor lines rod.
Summary of the invention:
The objective of the invention is to make a kind of under the 27kV electric pressure manufacturing process of the stator bar of turbo generator of good reliability, long service life.Technical solution of the present invention is a kind of manufacturing process of stator bar of turbo generator: 1) lead hot-forming after, the mind-set two ends pare off insulating barrier from the conductor leptoprosopy, expose naked copper, stator bar is made up of top bar and lower bar, top bar A repaiies one and reveals the copper point to the B point 88mm of being separated by, and top bar C repaiies a dew copper point to the D point 176mm of being separated by; Lower bar E repaiies one and reveals the copper point to the F point 102.7mm of being separated by, and lower bar G repaiies a dew copper point to the H point 205.4mm of being separated by, and equipotential layer length is 9210mm, even brushing one deck conductive paint in this scope, and then and around one deck low-resistance corona-prevention belt, the equipotential layer is promptly finished;
2) 34 layers of conductive line surfaces half-lap paulownia horse epoxy glass mica paper tapes after handle through equipotential layer are as main insulating layer;
3) after online excellent lead has held main insulating layer, determine to hinder in straight line low-resistance corona-prevention layer and the end anticorona coating, high resistant anticorona coating positions at different levels and line, hold anticorona part;
4) at straight line low-resistance corona-prevention layer place half-lap one deck low-resistance corona-prevention belt, line rod low-resistance corona-prevention layer end arrives distance A=350mm unshakable in one's determination vertically; Resistance corona-prevention belt in the half-lap step by step then, the wrapping of resistance anticorona coating is of a size of 50mm in the excellent surface along the line; High resistance corona-prevention belt, the wrapping of resistance anticorona coating is of a size of 120mm in the excellent surface along the line; High resistance corona-prevention belt, the wrapping of resistance anticorona coating is of a size of 160mm in the excellent surface along the line, and the anticorona coating overlap distance is 20mm; The resistance corona-prevention belt initiating terminal 20mmm that makes progress begins from half-lap, the terminal 20mm place downwards of paramount resistance corona-prevention belt only half-lap one deck mica tape as supplementary insulation; On supplementary insulation, the high resistance corona-prevention belt of half-lap one deck, starting point finishes from 15mm beginning before the supplementary insulation head end to distance lead-in wire 210mm place.
Technical characterstic of the present invention is:
Equipotential layer size of the present invention, each spot size of anti dizzy structure and the mode of working in coordination are critical datas, are to use first on present home products.Because the selection of each critical size and the reasonability of fit system; Make the 1000MW, the rated voltage 27kV level stator bar of turbo generator that adopt the present invention to produce, show exclusive electric field distribution characteristic and insulation characterisitic.Show as: insulation thickness is 6.2mm, and the puncture voltage of line rod reaches 6 times of rated voltage, and disruptive field intensity reaches 27.4kV/mm, and the 2.0Un following life-span of voltage reaches 4690h.Reach world-class levels.
The line rod basic mechanical design feature index that adopts the present invention to make is as follows:
Tg δ is less than 1% under the 1 normality 0.2Un.
2 stator bars no visual corona vestige behind the 30s under 81kV.
The average disruptive field intensity of 31000MW turbo generator line rod reaches 27.4kV/mm, and puncture voltage mean value reaches 186.15kV, surpasses 6 times of rated voltage.
The anti-electrical ageing test of 4 lines rod, the 3.0Un following life-span of voltage is greater than 39.2h; 2.0Un the following life-span of voltage is greater than 4690h.
34 layers of 5 main insulations wrappings (1/2 around) guarantee that insulation thickness reaches 6.2mm.
The present invention has novelty on technical indicators such as equipotential layer size, anti dizzy structure size, dew copper point distance and the mode of working in coordination, insulation thickness, break away from existing any product form fully, this innovation significantly improves puncture voltage, aging life-span index etc., sees survey report.This achievement has been filled up the domestic blank of this product, and every technical indicator all reaches domestic and international advanced level, makes China not need to introduce stator bar, can independently produce the 1000MW turbo generator.
The present invention obviously improves bight electric field situation by the multiple variation of size, the composite construction of equipotential layer, and when insulation thickness was 6.2mm, stator bar breakdown potential pressure energy reached 6 times of rated voltage, and the 2.0Un following life-span of voltage reaches 4690h.
Description of drawings:
Fig. 1 is a top bar equipotential layer structure chart
Fig. 2 is a lower bar equipotential layer structure chart
Fig. 3 is anticorona structure chart and size
Fig. 4 is a part dimension table of the present invention
Embodiment:
A kind of manufacturing process of stator bar of turbo generator: 1) lead 1 hot-forming after, the mind-set two ends pare off insulating barrier from the conductor leptoprosopy, expose naked copper, stator bar is made up of top bar and lower bar, as shown in Figure 1, top bar A repaiies one and reveals the copper point to the B point 88mm of being separated by, and top bar C repaiies a dew copper point to the D point 176mm of being separated by; As shown in Figure 2, lower bar E repaiies one and reveals the copper point to the F point 102.7mm of being separated by, and lower bar G repaiies a dew copper point to the H point 205.4mm of being separated by, equipotential layer 2 length are 9210mm, even brushing one deck conductive paint in this scope, then and around one deck low-resistance corona-prevention belt, the equipotential layer is promptly finished;
2) 34 layers of conductive line surfaces half-lap paulownia horse epoxy glass mica paper tapes after handle through equipotential layer are as main insulating layer 3;
3) after online excellent lead has held main insulating layer, determine to hinder in straight line low-resistance corona-prevention layer and the end anticorona coating, high resistant anticorona coating positions at different levels and line, hold anticorona part;
4) as shown in Figure 3, at straight line low-resistance corona-prevention layer 4 place's half-lap one deck low-resistance corona-prevention belt, line rod low-resistance corona-prevention layer end arrives distance A=350mm unshakable in one's determination vertically; Resistance corona-prevention belt 5 in the half-lap step by step then, the wrapping of resistance anticorona coating is of a size of 50mm in the excellent surface along the line; High resistance corona-prevention belt 6, the wrapping of resistance anticorona coating is of a size of 120mm in the excellent surface along the line; High resistance corona-prevention belt 7, the wrapping of resistance anticorona coating is of a size of 160mm in the excellent surface along the line, and the anticorona coating overlap distance is 20mm; The resistance corona-prevention belt 5 initiating terminals 20mmm that makes progress begins from half-lap, paramount resistance corona-prevention belt 7 terminal 20mm places downwards only half-lap one deck mica tape 8 as supplementary insulation; As shown in Figure 4, on supplementary insulation, the high resistance corona-prevention belt 9 of half-lap one deck, starting point finishes from 15mm beginning before the supplementary insulation head end to distance lead-in wire 210mm place.
Claims (1)
1, a kind of manufacturing process of stator bar of turbo generator is characterized in that:
1) lead (1) hot-forming after, the mind-set two ends pare off insulating barrier from the conductor leptoprosopy, expose naked copper, and stator bar is made up of top bar and lower bar, top bar A repaiies one and reveals the copper point to the B point 88mm of being separated by, and top bar C repaiies a dew copper point to the D point 176mm of being separated by; Lower bar E repaiies one and reveals the copper point to the F point 102.7mm of being separated by, lower bar G repaiies one and reveals the copper point to the H point 205.4mm of being separated by, and equipotential layer (2) length is 9210mm, even brushing one deck conductive paint in this scope, then and around one deck low-resistance corona-prevention belt, the equipotential layer is promptly finished;
2) 34 layers of conductive line surfaces half-lap paulownia horse epoxy glass mica paper tapes after handle through equipotential layer (2) are as main insulating layer (3);
3) after online excellent lead has held main insulating layer, determine to hinder in straight line low-resistance corona-prevention layer and the end anticorona coating, high resistant anticorona coating positions at different levels and line, hold anticorona part;
4) locate half-lap one deck low-resistance corona-prevention belt at straight line low-resistance corona-prevention layer (4), line rod low-resistance corona-prevention layer end arrives distance A=350mm unshakable in one's determination vertically; Resistance corona-prevention belt (5) in the half-lap step by step then, the wrapping of resistance anticorona coating is of a size of 50mm in the excellent surface along the line; High resistance corona-prevention belt (6), the wrapping of resistance anticorona coating is of a size of 120mm in the excellent surface along the line; High resistance corona-prevention belt (7), excellent surperficial high resistant anticorona coating wrapping along the line is of a size of 160mm, and the anticorona coating overlap distance is 20mm; Resistance corona-prevention belt from half-lap (5) the initiating terminal 20mmm that makes progress begins, the terminal 20mm place downwards of paramount resistance corona-prevention belt (7) only half-lap one deck mica tape (8) as supplementary insulation; On supplementary insulation, the high resistance corona-prevention belt of half-lap one deck (9), starting point finishes from 15mm beginning before the supplementary insulation head end to distance lead-in wire 210mm place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100722543A CN101577470B (en) | 2009-06-12 | 2009-06-12 | Manufacturing process of stator bar of turbo generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100722543A CN101577470B (en) | 2009-06-12 | 2009-06-12 | Manufacturing process of stator bar of turbo generator |
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| Publication Number | Publication Date |
|---|---|
| CN101577470A true CN101577470A (en) | 2009-11-11 |
| CN101577470B CN101577470B (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100722543A Expired - Fee Related CN101577470B (en) | 2009-06-12 | 2009-06-12 | Manufacturing process of stator bar of turbo generator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299593A (en) * | 2011-08-18 | 2011-12-28 | 陕西航空电气有限责任公司 | Forming method of multi-conductor parallel winding element |
| CN102790483A (en) * | 2012-08-30 | 2012-11-21 | 哈尔滨电机厂有限责任公司 | Three-dimensional parametric modeling and solid forming manufacture method of steam turbine generator stator bar |
| CN103595196A (en) * | 2013-11-20 | 2014-02-19 | 哈尔滨电气动力装备有限公司 | Forming process for strip-type winding bar of large-scale high-voltage motor |
| CN110649734A (en) * | 2018-06-27 | 2020-01-03 | 东元电机股份有限公司 | Motor winding structure |
| CN110889195A (en) * | 2019-10-31 | 2020-03-17 | 上海电气电站设备有限公司 | Method for calculating distance between upper and lower coils of same slot of motor stator |
| CN113726112A (en) * | 2021-10-14 | 2021-11-30 | 哈尔滨电机厂有限责任公司 | Manufacturing method of stator bar with staggered corona-proof structure |
-
2009
- 2009-06-12 CN CN2009100722543A patent/CN101577470B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102299593A (en) * | 2011-08-18 | 2011-12-28 | 陕西航空电气有限责任公司 | Forming method of multi-conductor parallel winding element |
| CN102790483A (en) * | 2012-08-30 | 2012-11-21 | 哈尔滨电机厂有限责任公司 | Three-dimensional parametric modeling and solid forming manufacture method of steam turbine generator stator bar |
| CN102790483B (en) * | 2012-08-30 | 2014-07-09 | 哈尔滨电机厂有限责任公司 | Three-dimensional parametric modeling and solid forming manufacture method of steam turbine generator stator bar |
| CN103595196A (en) * | 2013-11-20 | 2014-02-19 | 哈尔滨电气动力装备有限公司 | Forming process for strip-type winding bar of large-scale high-voltage motor |
| CN103595196B (en) * | 2013-11-20 | 2015-12-09 | 哈尔滨电气动力装备有限公司 | Large high-voltage motor bar formula line rod moulding process |
| CN110649734A (en) * | 2018-06-27 | 2020-01-03 | 东元电机股份有限公司 | Motor winding structure |
| CN110889195A (en) * | 2019-10-31 | 2020-03-17 | 上海电气电站设备有限公司 | Method for calculating distance between upper and lower coils of same slot of motor stator |
| CN110889195B (en) * | 2019-10-31 | 2023-09-26 | 上海电气电站设备有限公司 | Method for calculating distance between upper and lower layers of coils in same slot of motor stator |
| CN113726112A (en) * | 2021-10-14 | 2021-11-30 | 哈尔滨电机厂有限责任公司 | Manufacturing method of stator bar with staggered corona-proof structure |
| CN113726112B (en) * | 2021-10-14 | 2022-06-21 | 哈尔滨电机厂有限责任公司 | Manufacturing method of stator bar with staggered corona-proof structure |
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| Publication number | Publication date |
|---|---|
| CN101577470B (en) | 2012-01-11 |
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