CN102306988A - Insulation restoration method for generator rotor magnetic pole - Google Patents
Insulation restoration method for generator rotor magnetic pole Download PDFInfo
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- CN102306988A CN102306988A CN201110265695A CN201110265695A CN102306988A CN 102306988 A CN102306988 A CN 102306988A CN 201110265695 A CN201110265695 A CN 201110265695A CN 201110265695 A CN201110265695 A CN 201110265695A CN 102306988 A CN102306988 A CN 102306988A
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Abstract
The invention discloses an insulation restoration method for a generator rotor magnetic pole. The method comprises the following steps of: (1) disassembling a rotor magnetic pole coil, a core and insulators which are assembled together; (2) checking, sorting out and washing each disassembled part to clean up dirt on each part; (3) painting insulating paint on the coil and the insulators respectively; (4) sleeving a part of insulators on the core, painting glue on the insulators, assembling the coil on the core and sealing a seam between the coil and the core by using the glue; (5) arranging the other part of insulators on the coil, sealing gaps on the two end parts of the coil and painting the glue on the insulators; (6) arranging a pressing tool on the assembled magnetic pole for pre-pressing, and cleaning up residual glue on the magnetic pole; and (7) performing standing, and loosening and taking the pressing tool down after the glue painted on the magnetic pole is cured. By the method, the overall insulation level of the generator rotor magnetic pole is improved.
Description
Technical field
The present invention relates to the insulation restorative procedure of power generator rotor magnetic pole, it is especially suitable for use as repairs the insulation of hydropower generator rotor magnetic pole.
Background technology
The generator in the most of hydroelectric station of China is that the design of sixties Mo in last century is produced; Because at that time design and manufacturing process are comparatively limited; The power generator rotor magnetic pole insulated enclosure of design is undesirable; Often exist rotor insulation low, even do not have the phenomenon of insulation, this has had a strong impact on the normal operation in hydroelectric station.Existing is example with the Gong Zui hydroelectric station, and analysis elaborates.
The Gong Zui hydroelectric station is positioned at basin, domestic Dadu River, Sichuan Province, is established in the sixties, and the power station is divided into ground factory building and underground power house.Generator in the factory building is the Dongfang Electric Machinery Plant manufacturing, and first unit gone into operation the end of the year 1971, and whole units in 1978 are gone into operation and generated electricity, and total installed capacity 7 * 100MW moved for three more than ten years so far.The rotor insulation of these generators is a B-class insulation, because hydroelectric station ambient humidity of living in is bigger, surpasses certain hour as long as generator is stopped transport, and the power generator rotor magnetic pole insulation against ground usually can occur and can not satisfy job requirements, can't in time put into operation.For this reason, take generator not add under the situation of excitation usually and dally, utilize circulated air to come generator amature is carried out drying, qualified up to the insulation of generator amature.But idle running 24 hours appearred in two generators once, and rotor insulation still is the phenomenon of 0.1M; Through direct current method, measure the current potential of magnetic pole, find the low magnetic pole of insulation; Through Insulation test, decomposition, clean to magnetic pole, the insulation that makes magnetic pole is more than 500M.
Through long-term observation and research, producing the low main cause of above-mentioned insulation is that inner coil and the insulation system between the iron core of power generator rotor magnetic pole has certain slit, dustproof, the antifouling aspect existing problems of pole insulation.This is because generator brush and slip ring move the carbon dust that produces, and gets into other inner dust of generator, adds that the thrust bearing oil sump of generator has a spot of seepage oil; Under the circulated air effect that the generator rotation produces, on rotor pole surface, form the mist of oil mixture, these mist of oil mixtures are under the unit running; Because under the effect of action of centrifugal force and generator cooling wind-force; Progressively be penetrated in the insulation between pole coil and the pole core,, form the medium that is similar to " semiconductor " characteristic through accumulation for many years; Add that the region, power station is in the bigger area of air humidity; Make that rotor insulation is low behind the unit outage certain hour, even not insulation.When the unit expansion is repaiied, also can only clean comprehensively, and can't the inside of magnetic pole thoroughly be cleaned the outside of power generator rotor magnetic pole, this fundamentally can not thoroughly deal with problems all the time, has brought a difficult problem for the normal operation operation in power station.
Summary of the invention
The objective of the invention is to:, a kind of simple, economical and practical, reliable and stable power generator rotor magnetic pole insulation restorative procedure is provided to above-mentioned existing deficiency with technology.
The technical scheme that the present invention adopts is: a kind of power generator rotor magnetic pole insulation restorative procedure, this restorative procedure comprises the following steps:
(1). the rotor magnetic pole coil, iron core and the insulating part that are assembled together are disassembled out;
(2). each parts to disassembling out are checked respectively, cleaning, clean, make the dirt removal on each parts clean;
(3). brushing insulating varnish respectively on coil and insulating part;
(4). SI semi-insulation spare is sleeved on the iron core, and on these insulating parts brushing adhesive, coil is assemblied on the iron core, with the slit between glue shutoff coil and the iron core;
(5). another part insulating part is placed on above the coil gap with filling end, coil two ends respectively, and on these insulating parts brushing adhesive;
(6). on the magnetic pole that assembles, compaction tool is set, carries out precompressed and handle, and remove the surplus glue on the magnetic pole;
(7). leave standstill, wait to brush after the adhesive curing on the magnetic pole, unclamp the compaction tool on the magnetic pole, and take off, get final product.
Step (2) comprises following concrete steps:
1.. check each parts;
2.. with instrument outside dirt and coil stationary support in outside dirt, the insulating part in the aging insulation of coil surface, the iron core are removed respectively; Said instrument is wire brush, electrician's knife and/or carpenter's plane iron;
3.. the electrical appliance cleaning agent carries out clean respectively to each parts.
Step (3) comprises following concrete steps:
1.. side and two lateral surfaces brushing insulating varnish respectively in coil, and also brushing insulating varnish of the support that fixed coil is used;
2.. brushing insulating varnish on insulating part master cushion block.
Step (4) comprises following concrete steps:
1.. the insulating part lining is in place, and the lining opening part is glued;
2.. the insulation board of coil bottom surface one side is enclosed within on the iron core, between, insulation board inboard and the above-mentioned steps lining 1. at insulation board and insulation board and one week of lining outer edge the place, distinguish brushing adhesive;
3.. the piece cushion block that will insulate is in place, at insulation piece cushion block inboard, inferior cushion block joint and rivet position difference brushing adhesive;
4.. with the coil lifting, inspection, cleaning coil bottom; Coil hung put in place;
5.. inboard at coil upper end with insulation piece cushion block gap location, near one week of coil outer edge place, brushing adhesive respectively.
Step (5) comprises following concrete steps:
1.. insulating part master cushion block is placed on above the coil, and brushing adhesive between main cushion block and coil knocks main cushion block with instrument and to put in place; Said instrument is wooden mallet or rubber hammer;
2.. the gap location in end, coil two ends fills up the insulating part pad, and at brushing adhesive between the pad and between pad and the coil.
Said glue is Luo Na star glass cement.
Said glue is evenly brushing, and the glue smooth surface of brushing is smooth.
Said insulating varnish is the F class F insulation lacquer of the trade mark 188.
The invention has the beneficial effects as follows: above-mentioned restorative procedure in the insulation property that improve single insulating part simultaneously; Again tight shutoff has been carried out in a plurality of slits that form between pole coil and the iron core; Sealing effectiveness is good; The equipment that prevented gets into foreign matter such as dust and influences the pole insulation performance in running between pole coil and the iron core, improved the insulation level of power generator rotor magnetic pole on the whole.This restorative procedure is not only simple, economical and practical, and also reliable and stable with the power generator rotor magnetic pole insulation of its reparation.
Embodiment
A kind of power generator rotor magnetic pole insulation restorative procedure, this restorative procedure comprises the following steps:
(1). the rotor magnetic pole coil, iron core and the insulating part that are assembled together are disassembled out, and the insulating part after disassembling out has main cushion block, lining, insulation board, inferior cushion block and pad;
(2). each parts to disassembling out are checked respectively, cleaning, clean, make the dirt removal on each parts clean; The concrete refinement step of this step comprises: 1.. each parts of scrutiny; 2.. with wire brush and electrician's knife (perhaps carpenter's plane iron) outside dirt and coil stationary support in outside dirt, the insulating part lining in outside dirt, the insulating part master cushion block in the aging insulation of coil surface, the iron core are removed respectively; Thoroughly brushed until dirts such as the dust that makes adhesion, carbon dusts; When particularly scraping the coat of paint slag on the insulating part master cushion block with electrician's knife, should with see the insulation main cushion block body till; 3.. with commercially available special-purpose electrical appliance cleaner each parts is carried out clean respectively;
(3). brushing insulating varnish respectively on coil and insulating part, this insulating varnish are the F class F insulation lacquer of the trade mark 188; The concrete refinement step of this step comprises: 1.. side and two lateral surfaces brushing one deck insulating varnish respectively in coil, and also brushing one deck insulating varnish of the support that fixed coil is used, strengthen the dielectric strength of coil; 2.. brushing one deck insulating varnish on insulating part master cushion block, reinforced insulation and moisture-proof role;
(4). SI semi-insulation spare is sleeved on the iron core; This SI semi-insulation spare is respectively lining, insulation board and inferior cushion block; And on these insulating parts brushing adhesive, coil is assemblied on the iron core, with the slit between glue shutoff coil and the iron core; Glue and the glue in shutoff slit of brushing are Luo Na star glass cement, and this glue mainly has neutral cold curing, have no irritating odor, do not corrode by sticking material, solidify afterwards formation permanent elasticity body and can in-40～150 ℃ of scopes, keep performance such as elasticity; The concrete refinement step of this step comprises: 1.. the insulating part lining is in place, and the lining opening part is glued; 2.. the insulation board of coil bottom surface one side is enclosed within on the iron core, between, insulation board inboard and the above-mentioned steps lining 1. at insulation board and insulation board and one week of lining outer edge the place, distinguish brushing adhesive; 3.. the piece cushion block that will insulate is in place, and at insulation piece cushion block inboard, inferior cushion block joint and rivet position difference brushing adhesive, the glue of the inboard brushing of piece cushion block of wherein insulating is more more than other positions, to guarantee sealing effectiveness; 4.. coil is lifted by crane inspection, cleaning coil bottom with the lifting apparatus; After treating that coil bottom is out of question, slowly coil is hung and put in place; 5.. at coil upper end inboard and insulation piece cushion block gap location, and near one week of coil outer edge place, the difference brushing adhesive, the glue of side brushing in coil is more, and is good to guarantee sealing effectiveness;
(5). another part insulating part is placed on above the coil gap with filling end, coil two ends respectively, and this SI semi-insulation spare is main cushion block and pad, and on these insulating parts brushing adhesive, this glue is identical with the glue of step (4); The concrete refinement of this step comprises: 1.. insulating part master cushion block is placed on above the coil, and brushing adhesive between main cushion block and coil knocks main cushion block with wooden mallet (also can be the rubber hammer) and to put in place; 2.. the gap location in end, coil two ends fills up the insulating part pad, and at brushing adhesive between the pad and between pad and the coil;
(6). on the magnetic pole that assembles, compaction tool is set, carries out precompressed and handle; In precompressed is handled, can extrude a part of surplus glue on the magnetic pole, in time remove the surplus glue on the magnetic pole, the needs of squeezing into and adjust rotor circularity of magnetic pole key when guaranteeing that magnetic pole returns dress;
(7). leave standstill a period of time, wait to brush after the glue primary solidification on the magnetic pole, unclamp the compaction tool on the magnetic pole, and it is taken off, can accomplish the pole insulation repair.Next step can be fixed repairing whole the connection with yoke of good magnetic pole.
The brushing Luo Na star glass cement that relates in above-mentioned each step is evenly brushing, and the glue surface of brushing should be a smooth.
Above-mentioned restorative procedure is when exploration, experimental stage; The applicant is attempting No. 1 unit rotor magnetic pole insulation having carried out repair process to the Gong Zui hydroelectric station; And in April, 2003 power station entrust Sichuan Province power test research institute that No. 1 set generator is made a service test, result of the test is: satisfy the requirement of generator required cooling air quantity when specified burden with power 110MW operation; Generator is when 100% test load, and all more than 200M, the temperature rise of winding average copper is 49.43K only for the rotor integral insulation, and is lower than the design load (promptly examining temperature rise value) of Dongfang Electric Machinery Plant.This shows that this restorative procedure is greatly improved the hydropower generator rotor insulation, repairing effect is very desirable, obvious economic.
Claims (10)
1. power generator rotor magnetic pole insulation restorative procedure, this restorative procedure comprises the following steps:
(1). the rotor magnetic pole coil, iron core and the insulating part that are assembled together are disassembled out;
(2). each parts to disassembling out are checked respectively, cleaning, clean, make the dirt removal on each parts clean;
(3). brushing insulating varnish respectively on coil and insulating part;
(4). SI semi-insulation spare is sleeved on the iron core, and on these insulating parts brushing adhesive, coil is assemblied on the iron core, with the slit between glue shutoff coil and the iron core;
(5). another part insulating part is placed on above the coil gap with filling end, coil two ends respectively, and on these insulating parts brushing adhesive;
(6). on the magnetic pole that assembles, compaction tool is set, carries out precompressed and handle, and remove the surplus glue on the magnetic pole;
(7). leave standstill, wait to brush after the adhesive curing on the magnetic pole, unclamp the compaction tool on the magnetic pole, and take off, get final product.
2. according to the said power generator rotor magnetic pole insulation of claim 1 restorative procedure, it is characterized in that step (2) comprises following concrete steps:
1.. check each parts;
2.. with instrument outside dirt and coil stationary support in outside dirt, the insulating part in the aging insulation of coil surface, the iron core are removed respectively;
3.. the electrical appliance cleaning agent carries out clean respectively to each parts.
3. according to the said power generator rotor magnetic pole insulation of claim 1 restorative procedure, it is characterized in that step (3) comprises following concrete steps:
1.. side and two lateral surfaces brushing insulating varnish respectively in coil, and also brushing insulating varnish of the support that fixed coil is used;
2.. brushing insulating varnish on insulating part master cushion block.
4. according to the said power generator rotor magnetic pole insulation of claim 1 restorative procedure, it is characterized in that step (4) comprises following concrete steps:
1.. the insulating part lining is in place, and the lining opening part is glued;
2.. the insulation board of coil bottom surface one side is enclosed within on the iron core, between, insulation board inboard and the above-mentioned steps lining 1. at insulation board and insulation board and one week of lining outer edge the place, distinguish brushing adhesive;
3.. the piece cushion block that will insulate is in place, at insulation piece cushion block inboard, inferior cushion block joint and rivet position difference brushing adhesive;
4.. with the coil lifting, inspection, cleaning coil bottom; Coil hung put in place;
5.. inboard at coil upper end with insulation piece cushion block gap location, near one week of coil outer edge place, brushing adhesive respectively.
5. according to the said power generator rotor magnetic pole insulation of claim 1 restorative procedure, it is characterized in that step (5) comprises following concrete steps:
1.. insulating part master cushion block is placed on above the coil, and brushing adhesive between main cushion block and coil knocks main cushion block with instrument and to put in place;
2.. the gap location in end, coil two ends fills up the insulating part pad, and at brushing adhesive between the pad and between pad and the coil.
6. according to claim 1 or 4 or 5 said power generator rotor magnetic pole insulation restorative procedures, it is characterized in that said glue is Luo Na star glass cement.
7. according to claim 1 or 4 or 5 said power generator rotor magnetic pole insulation restorative procedures, it is characterized in that said glue is evenly brushing, the glue smooth surface of brushing is smooth.
8. according to the said power generator rotor magnetic pole of claim 2 insulation restorative procedure, it is characterized in that the instrument of step in 2. is wire brush, electrician's knife and/or carpenter's plane iron.
9. according to claim 1 or 3 said power generator rotor magnetic pole insulation restorative procedures, it is characterized in that said insulating varnish is the F class F insulation lacquer of the trade mark 188.
10. according to the said power generator rotor magnetic pole of claim 5 insulation restorative procedure, it is characterized in that the instrument of step in 1. is wooden mallet or rubber hammer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110265695 CN102306988B (en) | 2011-09-08 | 2011-09-08 | Insulation restoration method for generator rotor magnetic pole |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110265695 CN102306988B (en) | 2011-09-08 | 2011-09-08 | Insulation restoration method for generator rotor magnetic pole |
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| CN102306988B CN102306988B (en) | 2013-01-16 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104576012A (en) * | 2014-12-19 | 2015-04-29 | 海鸿电气有限公司 | Assembly method and structure for transformer body |
| CN106451956A (en) * | 2016-10-18 | 2017-02-22 | 江苏中车电机有限公司 | Enamel paint coating process for rotor magnetic pole of permanent magnet wind power generator |
| CN109768676A (en) * | 2019-03-18 | 2019-05-17 | 国家电网有限公司 | Rotor magnetic pole shroud loosens processing method |
| CN110421877A (en) * | 2019-07-19 | 2019-11-08 | 永济中车电机电器修配有限公司 | A kind of prosthetic device and restorative procedure for motor damage in insulation |
| CN110556980A (en) * | 2019-09-23 | 2019-12-10 | 上海电气集团上海电机厂有限公司 | method for improving insulating property of coil by motor in cabin |
| 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 |
| CN113300187A (en) * | 2021-04-28 | 2021-08-24 | 成都晋升泰科技有限公司 | Manufacturing production line and manufacturing process for CT slip ring |
| CN116037569A (en) * | 2023-01-04 | 2023-05-02 | 东方电气集团东方电机有限公司 | Method for cleaning insulation residual glue of pole body of rotor magnetic pole of hydraulic generator |
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Cited By (11)
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|---|---|---|---|---|
| CN104576012A (en) * | 2014-12-19 | 2015-04-29 | 海鸿电气有限公司 | Assembly method and structure for transformer body |
| CN106451956A (en) * | 2016-10-18 | 2017-02-22 | 江苏中车电机有限公司 | Enamel paint coating process for rotor magnetic pole of permanent magnet wind power generator |
| CN106451956B (en) * | 2016-10-18 | 2018-08-07 | 江苏中车电机有限公司 | A kind of enamel paint brushing technique of permanent magnet wind power generator rotor magnetic pole |
| CN109768676A (en) * | 2019-03-18 | 2019-05-17 | 国家电网有限公司 | Rotor magnetic pole shroud loosens processing method |
| CN110421877A (en) * | 2019-07-19 | 2019-11-08 | 永济中车电机电器修配有限公司 | A kind of prosthetic device and restorative procedure for motor damage in insulation |
| CN110556980A (en) * | 2019-09-23 | 2019-12-10 | 上海电气集团上海电机厂有限公司 | method for improving insulating property of coil by motor in cabin |
| 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 |
| CN113300187A (en) * | 2021-04-28 | 2021-08-24 | 成都晋升泰科技有限公司 | Manufacturing production line and manufacturing process for CT slip ring |
| CN113300187B (en) * | 2021-04-28 | 2022-10-14 | 嘉兴恩碧技电气有限公司 | Manufacturing production line and manufacturing process for CT slip ring |
| CN116037569A (en) * | 2023-01-04 | 2023-05-02 | 东方电气集团东方电机有限公司 | Method for cleaning insulation residual glue of pole body of rotor magnetic pole of hydraulic generator |
| CN116037569B (en) * | 2023-01-04 | 2024-04-26 | 东方电气集团东方电机有限公司 | Method for cleaning insulation residual glue of pole body of rotor magnetic pole of hydraulic generator |
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| CN102306988B (en) | 2013-01-16 |
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Address after: 614000 Hekou road central control building, Shawan Town, Shawan District, Leshan City, Sichuan Province Patentee after: Guoneng Daduhe maintenance and installation Co.,Ltd. Address before: 614000 Hekou road central control building, Shawan Town, Shawan District, Leshan City, Sichuan Province Patentee before: Maintenance and Installation Branch Company of State Power Dadu River Hydropower Development Co.,Ltd. |