CN102843005A - Preparation technique of semiconductor conformable filler strip in high-rating generator stator groove - Google Patents
Preparation technique of semiconductor conformable filler strip in high-rating generator stator groove Download PDFInfo
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- CN102843005A CN102843005A CN2012103452459A CN201210345245A CN102843005A CN 102843005 A CN102843005 A CN 102843005A CN 2012103452459 A CN2012103452459 A CN 2012103452459A CN 201210345245 A CN201210345245 A CN 201210345245A CN 102843005 A CN102843005 A CN 102843005A
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- fibre
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Abstract
The invention relates to a preparation technique of a semiconductor conformable filler strip in a high-rating generator stator groove. The semiconductor conformable filler strip is a carbon fiber felt containing 5-15% of polyester fibers, the surface resistivity of the semiconductor conformable filler strip is 5*10<2>-5*10<4>ohm, the thickness of the material is 2-4mm, and the coefficient of heat conductivity of the material is 0.5-20W/(mK). The semiconductor conformable filler strip is used on the bottom part of the stator groove, between the upper and lower stator coil bar layers and in a groove wedge. According to the invention, the problems that the conformable material soaked with semiconductive paint is likely to pollute the winding end part to generate a discharge phenomenon during the withstand voltage test process are solved, the offline technique time of the stator is shortened and the offline quality of the stator is improved.
Description
Technical field:
The present invention relates to the preparation technology of the right type filler strip of semiconductor in a kind of high-rating generator stator slot.
Background technology:
After the stator bar of high-rating generator is embedded into iron core, with the cell wall comprehensive engagement.Slot filler is an adaptive material at present, promptly soaks the terylene felt pan bar of epoxy semi-conductor adhesive.Use at terylene felt pan bar three positions in groove, under bottom land, interlayer, the wedge.When terylene felt pan bar uses, impregnated in the semiconductor epoxy glue, smooth out with the fingers unnecessary glue after the taking-up, dry 2～8 hours, moist feeling arranged but tack-free for well in room temperature.The room temperature held time surpassed after 36 hours, and the glue in the terylene felt will solidify and not have the effect of the type of fitting, and therefore flooding the terylene felt need prepare according to the duration consumption at every turn.When ambient temperature had bigger variation, the prescription and the flash-off time of dipping glue also will be adjusted.When rolling off the production line, also to prevent to flood the end of glue stain stator bar.When terylene felt gel content more for a long time, being squeezed after rolling off the production line can extrude glue, stops up ventilation hole unshakable in one's determination, or the end that flows to the line rod causes the discharge of withstand voltage test.This shows not only time-consuming of use semiconductor terylene felt pan bar, go back contaminated environment.
Summary of the invention:
The purpose of this invention is to provide and a kind ofly have certain semiconductive performance, also have a preparation technology that semiconductor in the high-rating generator stator slot of good tensile strength, flexibility and thermal stability is fitted the type filler strip.Technical scheme of the present invention is:
1), to fit the type filler strip be a kind of carbon fiber felt to semiconductor, several operations are prepared into below carbon fiber and polyster fibre warp:
A) shredding combing, the fibrous raw material that opener will tangle is each other loosened, and carding machine is carded to the ultimate fibre state with fiber then, removes short flannel with thin assorted, and carbon fiber and polyster fibre mix combing in proportion;
B) the even shakedown of long filament that lapping, lapping machine will be passed through combing is set to fibre web, again with the fibre web that is paved into layer by layer laying reach preset thickness;
C) acupuncture, needing machine are to the fibre web repeated localised puncture, and the fibre bundle that thrusts breaks away from pricker to be stayed in the fibre web, make fibre bundle tangle fibre web and form the Nomex with certain intensity; Depth of needling is elected 3～18mm as, and needling density is elected 50-250 thorn/cm as
2
D) rolling, Nomex is wiped out felt surface floating hair through shearing machine, calendering then, high-temperature shaping, clot packing;
2), the ratio of carbon fiber and polyster fibre is 85%～95%:5%～15%;
3), semiconductor is fitted its surface resistivity 5 * 10 of type filler strip
2～5 * 10
4Ω; Thickness is 2～4mm; Conductive coefficient is 0.5 ~ 20W/ (mK).
Semiconductor carbon fiber felt of the present invention is except original conformable material need flood semiconductor varnish, and having flooded lacquer also needs airing a period of time, the solvent contamination environment that contains in the semiconductor varnish; Semiconductor varnish unnecessary when rolling off the production line flows to winding overhang easily, is prone to electric discharge phenomena when causing withstand voltage test.In order to shorten in the groove conformable material time, avoid contaminated environment and withstand voltage electric discharge phenomena, improve line mass under the high-rating generator; Conformable material needing the dipping semiconductor varnish originally changes carbon fiber felt into, at whole winding withstand voltage test (2.0Un+3kV; In the time of 1min), can pass through smoothly.
The semiconductor that the present invention uses is fitted the type filler strip, uses with epoxy semiconductor layer pressing plate filler strip at interlayer; Under slot wedge, use with epoxy semiconductor layer pressing plate filler strip.Semiconductor fits that not only heat-conducting effect was good after the type filler strip compressed in groove, can also eliminate minim gap partial discharge phenomenon in the groove, avoids galvano-cautery occurring in the groove and useful life of reducing generator.The present invention combines the experience and the technology of stator slot internal fixation, and the semiconductor of exploitation is fitted the type filler strip, is fit to high-rating generator groove internal fixation technology, for high voltage, high power capacity and high-intensity generator insulating structural design and production provide reliable technique to guarantee.
Description of drawings:
Fig. 1 semiconductor of the present invention is fitted the type filler strip and is used sketch map,
Among the figure 1: semiconductor is fitted the type filler strip; 2: stator coil; 3: epoxy semiconductor filler strip; 4: the first epoxy semiconductor layer pressing plate filler strips; 5: the second epoxy semiconductor layer pressing plate filler strips; 6: slot wedge.
Embodiment:
Semiconductor is fitted the preparation technology of type filler strip in a kind of high-rating generator stator slot, it is characterized in that:
1), to fit the type filler strip be a kind of carbon fiber felt to semiconductor, several operations are prepared into below carbon fiber and polyster fibre warp:
A) shredding combing, the fibrous raw material that opener will tangle is each other loosened, and carding machine is carded to the ultimate fibre state with fiber then, removes short flannel with thin assorted, and carbon fiber and polyster fibre mix combing in proportion;
B) the even shakedown of long filament that lapping, lapping machine will be passed through combing is set to fibre web, again with the fibre web that is paved into layer by layer laying reach preset thickness;
C) acupuncture, needing machine are to the fibre web repeated localised puncture, and the fibre bundle that thrusts breaks away from pricker to be stayed in the fibre web, make fibre bundle tangle fibre web and form the Nomex with certain intensity; Depth of needling is elected 3～18mm as, and needling density is elected 50-250 thorn/cm as
2
D) rolling, Nomex is wiped out felt surface floating hair through shearing machine, calendering then, high-temperature shaping, clot packing;
2), the ratio of carbon fiber and polyster fibre is 85%～95%:5%～15%;
3), semiconductor is fitted its surface resistivity 5 * 10 of type filler strip
2～5 * 10
4Ω; Thickness is 2～4mm; Conductive coefficient is 0.5～20W/ (mK).
Said step D) Nomex high-temperature shaping temperature: 170～200 ℃, speed: 20m～28m/min.
Institute's carbon fiber-containing is a kind of in the fine base carbon fibre felt of polypropylene, asphalt base carbon fiber felt, the viscose-based carbon fiber felt.
It is a kind of carbon fiber felt that semiconductor is fitted type filler strip (1), is processed by carbon fiber and polyster fibre combing, lapping.The ratio of carbon fiber and polyster fibre is 85%～95%:5%～15%.Carbon fiber wherein is the fine base carbon fibre of polypropylene.Semiconductor is fitted type filler strip 1, its surface resistivity 5 * 10
2～5 * 10
4Ω; Thickness is 2～4mm; Conductive coefficient is 0.5 ~ 20W/ (mK).
As shown in Figure 1, semiconductor fit type filler strip 1 be used in stator slot at the bottom of, the position in levels stator bar 2 interlayers, slot wedge 6.Use with epoxy semiconductor filler strip 3 at interlayer; Under slot wedge, use with the first epoxy semiconductor layer pressing plate filler strip 4 and the second epoxy semiconductor layer pressing plate filler strip 5.
Embodiment 2:
It is a kind of carbon fiber felt that semiconductor is fitted type filler strip 1, is processed by carbon fiber and polyster fibre combing, lapping.The ratio of carbon fiber and polyster fibre is 85%～95%:5%～15%.Carbon fiber wherein is an asphalt base carbon fiber.Semiconductor is fitted type filler strip 1, its surface resistivity 5 * 10
2～5 * 10
4Ω; Thickness is 2～4mm; Conductive coefficient is 0.5 ~ 20W/ (mK).
As shown in Figure 1, semiconductor fit type filler strip 1 be used in stator slot at the bottom of, the position in levels stator bar 2 interlayers, slot wedge 6.Use with epoxy semiconductor filler strip 3 at interlayer; Under slot wedge, use with the first epoxy semiconductor layer pressing plate filler strip 4 and the second epoxy semiconductor layer pressing plate filler strip 5.
Embodiment 3:
It is a kind of carbon fiber felt that semiconductor is fitted type filler strip 1, is processed by carbon fiber and polyster fibre combing, lapping.The ratio of carbon fiber and polyster fibre is 85%～95%:5%～15%.Carbon fiber wherein is a viscose-based carbon fiber.Semiconductor is fitted type filler strip 1, its surface resistivity 5 * 10
2～5 * 10
4Ω; Thickness is 2～4mm; Conductive coefficient is 0.5 ~ 20W/ (mK).
As shown in Figure 1, semiconductor fit type filler strip 1 be used in stator slot at the bottom of, the position in levels stator bar 2 interlayers, slot wedge 6.Use with epoxy semiconductor filler strip 3 at interlayer; Under slot wedge, use with the first epoxy semiconductor layer pressing plate filler strip 4 and the second epoxy semiconductor layer pressing plate filler strip 5.
Claims (3)
1. semiconductor is fitted the preparation technology of type filler strip in the high-rating generator stator slot, it is characterized in that:
1), to fit the type filler strip be a kind of carbon fiber felt to semiconductor, several operations are prepared into below carbon fiber and polyster fibre warp:
A) shredding combing, the fibrous raw material that opener will tangle is each other loosened, and carding machine is carded to the ultimate fibre state with fiber then, removes short flannel with thin assorted, and carbon fiber and polyster fibre mix combing in proportion;
B) the even shakedown of long filament that lapping, lapping machine will be passed through combing is set to fibre web, again with the fibre web that is paved into layer by layer laying reach preset thickness;
C) acupuncture, needing machine are to the fibre web repeated localised puncture, and the fibre bundle that thrusts breaks away from pricker to be stayed in the fibre web, make fibre bundle tangle fibre web and form the Nomex with certain intensity; Depth of needling is elected 3～18mm as, and needling density is elected 50-250 thorn/cm as
2
D) rolling, Nomex is wiped out felt surface floating hair through shearing machine, calendering then, high-temperature shaping, clot packing;
2), the ratio of carbon fiber and polyster fibre is 85%～95%:5%～15%;
3), semiconductor is fitted its surface resistivity 5 * 10 of type filler strip
2～5 * 10
4Ω; Thickness is 2～4mm; Conductive coefficient is 0.5～20W/ (mK).
2. semiconductor is fitted the preparation technology of type filler strip in the high-rating generator stator slot according to claim 1, it is characterized in that: Nomex high-temperature shaping temperature said step D): 170～200 ℃, and speed: 20m～28m/min.
3. semiconductor is fitted the preparation technology of type filler strip in the high-rating generator stator slot according to claim 1, it is characterized in that: institute's carbon fiber-containing is a kind of in the fine base carbon fibre felt of polypropylene, asphalt base carbon fiber felt, the viscose-based carbon fiber felt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103452459A CN102843005A (en) | 2012-09-18 | 2012-09-18 | Preparation technique of semiconductor conformable filler strip in high-rating generator stator groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103452459A CN102843005A (en) | 2012-09-18 | 2012-09-18 | Preparation technique of semiconductor conformable filler strip in high-rating generator stator groove |
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|---|---|
| CN102843005A true CN102843005A (en) | 2012-12-26 |
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ID=47370128
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|---|---|---|---|
| CN2012103452459A Pending CN102843005A (en) | 2012-09-18 | 2012-09-18 | Preparation technique of semiconductor conformable filler strip in high-rating generator stator groove |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956868A (en) * | 2014-05-12 | 2014-07-30 | 哈尔滨电机厂有限责任公司 | Method for 1000 MW generator stator winding to get off assembly line |
| CN111030409A (en) * | 2019-12-31 | 2020-04-17 | 英格（阳江）电气股份有限公司 | Special generator for nonlinear load |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3891880A (en) * | 1972-06-16 | 1975-06-24 | Bbc Brown Boveri & Cie | High voltage winding with protection against glow discharge |
| JPS58172946A (en) * | 1982-04-05 | 1983-10-11 | Toshiba Corp | Rotor for rotary electric machine |
| JPS59213247A (en) * | 1983-05-18 | 1984-12-03 | Hitachi Ltd | Winding for electric machine |
| CN101407975A (en) * | 2008-10-31 | 2009-04-15 | 天津工业大学 | Method for preparing flexible non-weaving suction wave material and product thereof |
| CN102296424A (en) * | 2011-08-22 | 2011-12-28 | 海宁永大电气新材料有限公司 | Anticorona low-resistance belt and manufacture method thereof |
-
2012
- 2012-09-18 CN CN2012103452459A patent/CN102843005A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3891880A (en) * | 1972-06-16 | 1975-06-24 | Bbc Brown Boveri & Cie | High voltage winding with protection against glow discharge |
| JPS58172946A (en) * | 1982-04-05 | 1983-10-11 | Toshiba Corp | Rotor for rotary electric machine |
| JPS59213247A (en) * | 1983-05-18 | 1984-12-03 | Hitachi Ltd | Winding for electric machine |
| CN101407975A (en) * | 2008-10-31 | 2009-04-15 | 天津工业大学 | Method for preparing flexible non-weaving suction wave material and product thereof |
| CN102296424A (en) * | 2011-08-22 | 2011-12-28 | 海宁永大电气新材料有限公司 | Anticorona low-resistance belt and manufacture method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956868A (en) * | 2014-05-12 | 2014-07-30 | 哈尔滨电机厂有限责任公司 | Method for 1000 MW generator stator winding to get off assembly line |
| CN111030409A (en) * | 2019-12-31 | 2020-04-17 | 英格（阳江）电气股份有限公司 | Special generator for nonlinear load |
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Application publication date: 20121226 |