CN106374690A - Stator wire rod insulation onsite repairing method for large generator - Google Patents
Stator wire rod insulation onsite repairing method for large generator Download PDFInfo
- Publication number
- CN106374690A CN106374690A CN201610880721.5A CN201610880721A CN106374690A CN 106374690 A CN106374690 A CN 106374690A CN 201610880721 A CN201610880721 A CN 201610880721A CN 106374690 A CN106374690 A CN 106374690A
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- China
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- repairing
- insulation
- wire rod
- damaged part
- filling
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0006—Disassembling, repairing or modifying dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The invention discloses a stator wire rod insulation onsite repairing method for a large generator. The stator wire rod insulation onsite repairing method uses materials of a mica tape with low dosage of adhesive, a mica tape with high dosage of adhesive, room-temperature cured epoxy resin adhesive, a pre-impregnated glass tape (PG band) and the like; a main insulation damaged part of the stator wire rod is repaired on the site of accident of the generator; through a reasonable and reliable repairing process, the main insulation repairing of the wire rod is completed within a short time; it is ensured that the repaired stator winding can satisfy long-term, stable and reliable operational requirements of a machine set; meanwhile, a technological process of stator wire rod insulation onsite repairing for the large generator is specified; all repaired machine sets are re-input into operation; the repaired winding is excellent and reliable in insulation performance; and compared with a former generator accident treatment method, the stator wire rod insulation onsite repairing method can ensure the repairing quality, avoid disassembling and replacing of the stator wire rod, save a huge repairing cost, greatly shorten the rush repairing period, and has great economic benefit and social benefit.
Description
Technical field:
The field repairing method the present invention relates to a kind of large generator stator bar insulate.
Background technology:
Problem in the defect that manufactures and designs, installation process, the error in operation maintenance are all likely to result in large-scale generating
The damage of stator bar major insulation in machine work process, conventional restorative procedure is using resin-rich mica tape and room-temperature curing epoxy
Resin, carries out after damaged part is filled and led up wrapping up, solidifies, because in resin-rich mica tape, mica content is less, epoxy glue solidification
The higher scene of temperature is difficult to the problems such as be fully cured, it is difficult to ensure that the electrical strength after live major insulation reparation and long-term insulating properties
Can, therefore it is only capable of carrying away impaired stator bar in stator coring groove, using resin-rich mica tape to impaired lighter stator line
Rod carries out repair process, and impaired slightly serious stator bar often can only scrap process, changes new bar, this restorative procedure
The field repair leading to stator bar haves such problems as that repairing quality is poor, repairing cycle length, rehabilitation cost is high.
Content of the invention:
It is an object of the invention to provide one kind can improve reparation after insulating coating performance so as to meet machine group leader
Phase, the stable, requirement of reliability service, can avoid splitting out, changing of stator bar again, save substantial amounts of rehabilitation cost, significantly
Shorten the generator stator bar insulation field repair process of repairing duration.The technical scheme that the present invention takes is:
A. stator bar damaged part is cleared up: stator bar damaged part is carried out with comprehensively careful cleaning, first
Cleared up near damaged part with vacuum cleaner, subsequently the calico with dipping in dehydrated alcohol carefully wipes, and confirms dehydrated alcohol
Next step operation can be carried out after volatilizing completely；
B. the anti-halo layer of impaired place circumferential location is polished off and clears up: be with fine sandpaper, impaired place circumferential location is anti-corona
Layer polishes off, and notes should ensureing during polishing stator bar major insulation not to be caused to damage as far as possible, should use vacuum cleaner pair during polishing
The Anti-Corona Material powder grinding off is cleared up；
C. damaged part major insulation and its circumferencial direction reconditioning are gone out taper: damaged part major insulation reconditioning is gone out taper,
Then its circumferencial direction reconditioning is gone out the less taper of the gradient, process in order to the wrapping after damaged part filling, reconditioning completes
Carry out comprehensively careful cleaning afterwards；
D. grind mica flake: the mica sheet stripping down on low resin mica tape is ground to form mica flake, for ensureing to repair
The filling effect of breakage when multiple, the piece footpath of mica flake should control in below 2mm；
E. mix two component epoxy solidification glue: will there is the double component solvent-free cold curing of good, wide in range processing performance
Epoxide-resin glue stirring, mix homogeneously, note during mixing firming agent should be poured slowly in epoxy resin, do not stop to stir, mix
Gelatin viscosity after conjunction is relatively low, working life is longer it is ensured that the smoothness repairing operation under any environmental condition is carried out with coherent；
F. mica flake is mixed with epoxide-resin glue: mixed epoxide-resin glue in right amount is poured into ground Muscovitum
In fragment, stir, the mixture after stirring should be pasty state dope；
G. mixture is filled and solidify: mixture is filled in damaged part, packed height is than stator bar major insulation
Horizontal plane is lower slightly, stands at least 6 hours and be fully cured with guaranteeing mixture after filling, for shortening mixture hardening time, can be
With drying rifle, heat treated is carried out to filling position after filling；
H. filling position is wrapped up and solidified: the resin-rich mica tape using epoxy resin-impregnated glue is carried out tightly to filling
Cause wrapping to improve the mechanical strength of insulation, Muscovitum as to the insulation reinforcement repairing position it is ensured that the seriality of bar insulation
Carry using half-lap wrapping, repairing position after wrapping should be more slightly higher than major insulation horizontal plane near it, stands 6 hours to guarantee epoxy
Resin glue is fully cured；
I. wrapping position is carried out by hacking and clears up: with fine sandpaper, hacking process is carried out to wrapping position, after hacking
Comprehensively careful cleaning is carried out to whole restoring area；
J. brushing anticorona varnish solidifying: in restoring area circumferencial direction brushing anticorona varnish it is ensured that anticorona varnish and stator bar
Former anti-halo layer completely overlaps, and standing is fully cured for 12 hours with guaranteeing anticorona varnish.
The present invention is technically characterized by comprising the steps as follows:
1) there is high electrical strength at injury repairing
Large generator stator bar insulation field repairing method proposed by the invention, main repair materials are high-purity
Mica powder and solvent-free epoxy resin glue it is ensured that at injury repairing electric property excellent, reliable；
2) after repairing, bar has good overall dimensions
Bar after application the method for the invention reparation, injury repairing region bar flat appearance, is not in obvious
Change, it is ensured that bar has good overall dimensions, does not interfere with hypotenuse gap and the interlayer interval of winding；
3) significantly shorten repair time, save a large amount of rehabilitation costs
Compared with conventional restorative procedure, the method for the invention avoids stator line while ensureing repairing quality
Splitting out, changing of rod, has saved substantial amounts of rehabilitation cost, repairing duration has been greatly shortened；
4) be used low resin mica tape as major insulation reparation main material compared with resin-rich mica tape, few glue Muscovitum
Mica content in band high it is ensured that the electrical strength at repaired position；
5) from the double component solvent-free room selected by room temperature curing epoxy glue with good process performance
After the mixing of warm curing epoxy resin adhesive, there is relatively low viscosity and longer working life, operational characteristic good, wide in range it is ensured that
The smoothness repairing operation under any environmental condition is carried out with coherent；
6) it is used the continuous insulation reinforcement resin-rich mica tape wrapped up as restoring area of resin-rich mica tape can bear relatively
Using the wrapping that restoring area carried out compact of the resin-rich mica tape of epoxy resin-impregnated glue, big wrapping tension force, can ensure that bar is exhausted
The seriality of edge, improves the mechanical strength of insulation；
7) using preimpregnated glass silk ribbon (pg band), winding is carried out with the fixing pg band of colligation and there is good machinery by force
Degree and processing performance, carry out local colligation using pg band to winding after repairing and fix, and in external coating room-temperature curing epoxy tree
Fat glue is it is ensured that winding firm, stable is it is ensured that unit can for a long time, reliably run after repairing.
The method of the invention uses low resin mica tape, resin-rich mica tape, room temperature curing epoxy glue, preimpregnated glass
The materials such as silk ribbon (pg band), repair to stator bar major insulation damaged part in the electromotor scene of the accident, by rationally, can
The renovation technique leaning on, completes main insulation of bar reparation at short notice, and ensure repair after stator winding disclosure satisfy that machine group leader
Phase, the stable, requirement of reliability service, using the method for the invention, the unit after all reparations all puts into operation again, repairs
Winding insulation excellent performance, reliability afterwards, compared with conventional electromotor Accident Handling Method, the method for the invention is ensureing to repair
Avoid splitting out, changing of stator bar while compound body amount, saved substantial amounts of rehabilitation cost, repairing work is greatly shortened
Phase, there is great economic benefit and social benefit.
Brief description:
Fig. 1 impaired bar schematic diagram
Fig. 2 anti-halo layer polishing schematic diagram
Fig. 3 major insulation taper reconditioning schematic diagram
Fig. 4 mixture fills schematic diagram
Fig. 5 damaged part wraps up schematic diagram
Fig. 6 anticorona varnish brushing schematic diagram
Specific embodiment:
The present invention is a kind of large generator stator bar insulation field repairing method, comprises the following steps that:
A. stator bar damaged part is cleared up: bar damage situations are as shown in figure 1, position shown in sequence number 1 is fixed
Sub- anticorona coating on bar, position shown in sequence number 2 is the impaired place of bar, and to stator bar, impaired place 2 carries out comprehensively careful cleaning, first
With vacuum cleaner, to bar, impaired place 2 nearby clears up, and subsequently the calico with dipping in dehydrated alcohol carefully wipes, and confirms anhydrous second
Alcohol can carry out next step operation after volatilizing completely；
B. the anti-halo layer 1 of impaired for bar place 2 circumferential location is polished off and clears up: as shown in Figure 2 will be impaired with fine sandpaper
The anti-halo layer 1 locating 2 circumferential location polishes off, and position shown in sequence number 3 is stator bar major insulation, notes should ensureing during polishing as far as possible
Stator bar major insulation 3 is not caused to damage, using vacuum cleaner, the Anti-Corona Material powder grinding off should be cleared up during polishing；
C. damaged part major insulation and its circumferencial direction reconditioning are gone out taper: damaged part major insulation reconditioning is gone out taper,
Subsequently its circumferencial direction reconditioning is gone out the less taper of the gradient, process in order to the wrapping after damaged part filling, reconditioning completes
Carry out comprehensively careful cleaning afterwards, reconditioning effect is as shown in Figure 3；
D. grind mica flake: the mica sheet stripping down on low resin mica tape is ground to form mica flake, for ensureing to repair
The filling effect of breakage when multiple, the piece footpath of mica flake should control in below 2mm；
E. mix two component epoxy solidification glue: will there is the double component solvent-free cold curing of good, wide in range processing performance
Epoxide-resin glue stirring, mix homogeneously, note during mixing firming agent should be poured slowly in epoxy resin, do not stop to stir, mix
Gelatin viscosity after conjunction is relatively low, working life is longer it is ensured that the smoothness repairing operation under any environmental condition is carried out with coherent；
F. mica flake is mixed with epoxide-resin glue: mixed epoxide-resin glue in right amount is poured into ground Muscovitum
In fragment, stir, the mixture after stirring should be pasty state dope；
G. mixture is filled and solidify: filling effect position as shown in Figure 4 is mica powder, epoxy glue mixture 4, will mix
Compound 4 is filled in damaged part, and packed height is more lower slightly than stator bar major insulation 3 horizontal plane, stand at least 6 hours after filling with
Guarantee that mixture 4 is fully cured, for shortening mixture 4 hardening time, can with drying rifle, filling position be heated after filling
Process；
H. filling position is wrapped up and solidified: wrapping effect position as shown in Figure 5 is wrapping area, using leaching
The resin-rich mica tape of stain epoxide-resin glue filling is carried out compacting wrapping using as to the insulation reinforcement repairing position it is ensured that bar
The seriality of insulation, improves the mechanical strength of insulation, and wrapping position 5 adopts half-lap to wrap up, and repairing position after wrapping should be than it
Nearby major insulation horizontal plane is slightly higher, and standing is fully cured for 6 hours with guaranteeing epoxide-resin glue；
I. wrapping position 5 is carried out by hacking and clears up: with fine sandpaper, hacking process, hacking are carried out to wrapping position 5
Afterwards comprehensively careful cleaning is carried out to whole restoring area；
J. brushing anticorona varnish solidifying: in restoring area circumferencial direction brushing anticorona varnish it is ensured that anticorona varnish and stator bar
Former anti-halo layer 1 completely overlaps, and standing is fully cured for 12 hours with guaranteeing anticorona varnish, and it is as shown in Figure 6 that anticorona varnish applies brushing effects.
Claims (1)
1. a kind of large generator stator bar insulation field repairing method is it is characterised in that comprise the following steps:
A. stator bar damaged part is cleared up: comprehensively careful cleaning is carried out to stator bar damaged part, first with inhaling
Dirt device is cleared up near damaged part, and subsequently the calico with dipping in dehydrated alcohol carefully wipes, and confirms that dehydrated alcohol is complete
Next step operation can be carried out after volatilization；
B. the anti-halo layer of impaired place circumferential location is polished off and clears up: with fine sandpaper, the anti-halo layer of impaired place circumferential location is beaten
Grind off, note should ensureing stator bar major insulation not to be caused during polishing to damage as far as possible, should be using vacuum cleaner to grinding off during polishing
Anti-Corona Material powder cleared up；
C. damaged part major insulation and its circumferencial direction reconditioning are gone out taper: damaged part major insulation reconditioning is gone out taper, then
Its circumferencial direction reconditioning is gone out the less taper of the gradient, processes in order to the wrapping after damaged part filling, reconditioning completes laggard
The comprehensively careful cleaning of row；
D. grind mica flake: the mica sheet stripping down on low resin mica tape is ground to form mica flake, during for ensureing to repair
The filling effect of breakage, the piece footpath of mica flake should control in below 2mm；
E. mix two component epoxy solidification glue: will there is the double component solvent-free room-temperature curing epoxy of good, wide in range processing performance
Resin glue stirring, mix homogeneously, note during mixing firming agent should be poured slowly in epoxy resin, do not stop to stir, after mixing
Gelatin viscosity is relatively low, working life is longer it is ensured that the smoothness repairing operation under any environmental condition is carried out with coherent；
F. mica flake is mixed with epoxide-resin glue: mixed epoxide-resin glue in right amount is poured into ground mica flake
In, stir, the mixture after stirring should be pasty state dope；
G. mixture is filled and solidify: mixture is filled in damaged part, packed height is than stator bar major insulation level
Face is lower slightly, stands at least 6 hours and be fully cured with guaranteeing mixture after filling, for shortening mixture hardening time, can be in filling
With drying rifle, heat treated is carried out to filling position afterwards；
H. filling position is wrapped up and solidified: the resin-rich mica tape using epoxy resin-impregnated glue is carried out, to filling, the bag that compacts
Prick to improve the mechanical strength of insulation, mica tape is adopted as to the insulation reinforcement repairing position it is ensured that the seriality of bar insulation
With half-lap wrapping, repairing position after wrapping should be more slightly higher than major insulation horizontal plane near it, stands 6 hours to guarantee epoxy resin
Glue is fully cured；
I. wrapping position is carried out by hacking and clears up: with fine sandpaper, hacking process is carried out to wrapping position, to whole after hacking
Individual restoring area carries out comprehensively careful cleaning；
J. brushing anticorona varnish solidifying: in restoring area circumferencial direction brushing anticorona varnish it is ensured that anticorona varnish and stator bar place where troops were originally stationed
Dizzy layer completely overlaps, and standing is fully cured for 12 hours with guaranteeing anticorona varnish.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610880721.5A CN106374690B (en) | 2016-10-09 | 2016-10-09 | Large generator stator bar insulation field repairing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610880721.5A CN106374690B (en) | 2016-10-09 | 2016-10-09 | Large generator stator bar insulation field repairing method |
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| Publication Number | Publication Date |
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| CN106374690A true CN106374690A (en) | 2017-02-01 |
| CN106374690B CN106374690B (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610880721.5A Active CN106374690B (en) | 2016-10-09 | 2016-10-09 | Large generator stator bar insulation field repairing method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941244A (en) * | 2017-05-17 | 2017-07-11 | 成都清威科技有限公司 | A kind of switch cubicle insulation restorative procedure |
| CN109586519A (en) * | 2017-09-29 | 2019-04-05 | 上海宝钢工业技术服务有限公司 | The fast repairing method of variable-frequency high-voltage motor winding insulation breakage |
| CN110912361A (en) * | 2019-12-18 | 2020-03-24 | 国家电网有限公司 | Method for repairing anti-corona layer of generator stator bar |
| CN111725961A (en) * | 2020-07-24 | 2020-09-29 | 哈尔滨电机厂有限责任公司 | Method for repairing damaged low-resistance anti-corona layer of generator stator bar notch |
| CN113922601A (en) * | 2021-11-11 | 2022-01-11 | 哈尔滨电机厂有限责任公司 | Local replacement process method for upper-layer wire rod of stator of large-scale gas turbine generator |
| WO2022179464A1 (en) * | 2021-02-23 | 2022-09-01 | 中国长江电力股份有限公司 | Stator iron core melting repairing device and method for large hydro-generator |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1356128A1 (en) * | 1982-10-11 | 1987-11-30 | Г.С.Дегиль и Б.Г.Дегиль | Method of reparing high-voltage insulation of stator windings of electric machines |
| SU1629946A1 (en) * | 1988-08-09 | 1991-02-23 | Череповецкий Металлургический Комбинат Им.50-Летия Ссср | Technique for repairing electrical machine windings |
| US20040202782A1 (en) * | 2003-04-14 | 2004-10-14 | General Electric Company | Methods for repairing insulating material |
| CN1980011A (en) * | 2005-12-09 | 2007-06-13 | 江苏锡安达防爆股份有限公司 | High-voltage motor stator winding winding breakdown repairing method |
| CN101145714A (en) * | 2007-08-15 | 2008-03-19 | 山东齐鲁电机制造有限公司 | Repair technology for penetrated high-voltage motor stator coil of vacuum pressure soakage |
| CN202353403U (en) * | 2011-12-13 | 2012-07-25 | 中国西电电气股份有限公司 | Stator coil repairing structure for large impact generator set |
| CN104247222A (en) * | 2012-02-20 | 2014-12-24 | 西班牙阿尔斯通可再生能源有限公司 | Methods of repairing a winding in a generator, and kits for making a substitute coil |
| JP5776300B2 (en) * | 2011-04-20 | 2015-09-09 | トヨタ自動車株式会社 | Winding and coil forming method, and coil damage repairing method |
-
2016
- 2016-10-09 CN CN201610880721.5A patent/CN106374690B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1356128A1 (en) * | 1982-10-11 | 1987-11-30 | Г.С.Дегиль и Б.Г.Дегиль | Method of reparing high-voltage insulation of stator windings of electric machines |
| SU1629946A1 (en) * | 1988-08-09 | 1991-02-23 | Череповецкий Металлургический Комбинат Им.50-Летия Ссср | Technique for repairing electrical machine windings |
| US20040202782A1 (en) * | 2003-04-14 | 2004-10-14 | General Electric Company | Methods for repairing insulating material |
| CN1980011A (en) * | 2005-12-09 | 2007-06-13 | 江苏锡安达防爆股份有限公司 | High-voltage motor stator winding winding breakdown repairing method |
| CN101145714A (en) * | 2007-08-15 | 2008-03-19 | 山东齐鲁电机制造有限公司 | Repair technology for penetrated high-voltage motor stator coil of vacuum pressure soakage |
| JP5776300B2 (en) * | 2011-04-20 | 2015-09-09 | トヨタ自動車株式会社 | Winding and coil forming method, and coil damage repairing method |
| CN202353403U (en) * | 2011-12-13 | 2012-07-25 | 中国西电电气股份有限公司 | Stator coil repairing structure for large impact generator set |
| CN104247222A (en) * | 2012-02-20 | 2014-12-24 | 西班牙阿尔斯通可再生能源有限公司 | Methods of repairing a winding in a generator, and kits for making a substitute coil |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941244A (en) * | 2017-05-17 | 2017-07-11 | 成都清威科技有限公司 | A kind of switch cubicle insulation restorative procedure |
| CN109586519A (en) * | 2017-09-29 | 2019-04-05 | 上海宝钢工业技术服务有限公司 | The fast repairing method of variable-frequency high-voltage motor winding insulation breakage |
| CN110912361A (en) * | 2019-12-18 | 2020-03-24 | 国家电网有限公司 | Method for repairing anti-corona layer of generator stator bar |
| CN111725961A (en) * | 2020-07-24 | 2020-09-29 | 哈尔滨电机厂有限责任公司 | Method for repairing damaged low-resistance anti-corona layer of generator stator bar notch |
| WO2022179464A1 (en) * | 2021-02-23 | 2022-09-01 | 中国长江电力股份有限公司 | Stator iron core melting repairing device and method for large hydro-generator |
| CN113922601A (en) * | 2021-11-11 | 2022-01-11 | 哈尔滨电机厂有限责任公司 | Local replacement process method for upper-layer wire rod of stator of large-scale gas turbine generator |
| CN113922601B (en) * | 2021-11-11 | 2024-03-15 | 哈尔滨电机厂有限责任公司 | Local replacement process method for upper-layer bar of large-sized gas turbine generator stator |
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