CN105743293A - Upper joint welding and joint box pouring plugging method for power generator stator winding - Google Patents
Upper joint welding and joint box pouring plugging method for power generator stator winding Download PDFInfo
- Publication number
- CN105743293A CN105743293A CN201610288205.3A CN201610288205A CN105743293A CN 105743293 A CN105743293 A CN 105743293A CN 201610288205 A CN201610288205 A CN 201610288205A CN 105743293 A CN105743293 A CN 105743293A
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- headgear
- joint
- insulation booth
- bar
- asbestos
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000003466 welding Methods 0.000 title claims abstract description 32
- 238000004804 winding Methods 0.000 title claims abstract description 18
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003292 glue Substances 0.000 claims abstract description 35
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 70
- 239000010425 asbestos Substances 0.000 claims description 45
- 229910052895 riebeckite Inorganic materials 0.000 claims description 45
- 239000004744 fabric Substances 0.000 claims description 40
- 150000001875 compounds Chemical class 0.000 claims description 27
- 238000004382 potting Methods 0.000 claims description 27
- 230000010412 perfusion Effects 0.000 claims description 18
- 239000004593 Epoxy Substances 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 15
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 230000006378 damage Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 210000002268 wool Anatomy 0.000 claims description 5
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 3
- 244000137852 Petrea volubilis Species 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- H02K15/0056—Manufacturing winding connections
- H02K15/0068—Connecting winding sections; Forming leads; Connecting leads to terminals
-
- 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
- H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The invention relates to the field of a power generator, and particularly to an upper joint welding and joint box pouring and plugging method for a power generator stator winding. The upper joint welding and joint box pouring and plugging method comprises the steps of plugging before upper end welding, performing preparation operation, plugging and end welding. The upper joint welding and joint box pouring plugging method effectively prevent tin leakage in welding and glue leakage in pouring. The upper joint welding and joint box pouring plugging method has advantages of high maintenance quality, high efficiency, high safety, high stability, concise technology, high practicability, effective cost reduction and remarkable economic benefit improvement.
Description
Technical field
The present invention relates to electrical generator fields, i.e. the welding of generator unit stator winding upper connection and connector box perfusion method for blocking.
Background technology
In the prior art, the stator winding of electromotor is made up of the many welded series connection of bar, these plumb joints to be subject to the impact of various mechanical vibration in generator operation, short circuit current and the electrodynamic effect of short circuit current generation is subject to when fault, all it is likely to make the resistance of some plumb joints increase and cause heating, for guaranteeing that in unit running process, each connector temperature of generator unit stator winding is in normal range, prevent the generation of the accident of snapping, need the D.C. resistance of periodic measurement generator unit stator winding, and substantial portion of D.C. resistance exceeds standard not good with the welding quality of stator joint own, such as disconnected stock, rosin joints etc. have very big relation, in installation process, the quality control efforts of stator weld is particularly important；Stator winding splice insulation is realized by connector box, and whether splice insulation quality, leakage current be qualified, depends on splice insulation box pouring quality.Conventional bar joint adopts and headgear soldering process, and splice insulation is the perfusion of insulation booth epoxy resin.The welding of upper end adopted asbestos nest to encase termination headgear in the past, also headgear heating will add Colophonium and scolding tin after reaching uniform temperature, make and in headgear, be full of scolding tin, welding to check asbestos nest bottom leaky situation at any time, and leak stopping in time prevents molten stannum from flowing in end crevice, due to scolding tin weight in welding, asbestos nest is made well also very easily occurs leakage stannum phenomenon again.And for technology that welding and the insulation booth of upper end is poured in " hydraulic generator stator assembled in situ technique directive/guide " and " maintenance procedure of electrical equipment " all without molding, difficult point in maintenance is in that leak stopping difficulty, in welding and perfusion, leakage stannum and leakage glue phenomenon happen occasionally, this had both affected the efficiency of maintenance, also contributed to repair quality.The perfusion of upper end insulation booth was mix up position after being inserted in by insulation booth in the past, with epoxy putty, insulation booth end opening is blocked, owing between stator end connector box, gap is big compared with gap between little, levels bar, in addition cannot see many reasons such as closure situation during closure, want closure and do not leak extremely difficult.
Summary of the invention
It is an object of the invention to provide a kind of generator unit stator winding upper connection welding and connector box perfusion method for blocking for above-mentioned deficiency, effectively prevent the phenomenon of welding hourglass stannum and perfusion hourglass glue and occur.
The technical solution of the present invention is: a kind of generator unit stator winding upper connection welding method, it is characterised in that step is as follows:
One, closure before upper end welding
One) preparation
1, stator end and gap are cleaned up.
2, carefully clear up bar joint area with acetone, thoroughly remove the remaining glue of joint surface, oxide layer and other dirt, see true qualities with 0# sand paper and brass wire brush polishing bar joint, and clean with alcohol washes.
3, with shaping tool, upper and lower layer line rod lead riser being corrected alignment, left and right tolerance is less than 5mm.
4, correct in qualified rear enclosure and headgear, load copper wedge, copper cash and and headgear between gap be not more than 0.3mm.
5, with locking pliers will and after headgear and bar strand combine closely, then cut winding termination redundance copper cash with crop instrument, make and headgear top simultaneously.
Two) closure
1, asbestos cloth being cut into corresponding size, on asbestos cloth, spacing and width according to also headgear end face cut strip mouth, are enclosed within and on headgear, use hands compacting after packaging, it is ensured that asbestos cloth and bar close contact.
2, tight with soaking asbestos cloth plug between stator upper and lower layer line rod and between adjacent bar, it is prevented that solder is fallen in iron core slot, and asbestos cloth is not easily overly wet, in order to avoid water droplet instills bar and makes stator make moist.
3, cable paper is cut into T-shaped, and " horizontal stroke " length is and the girth of headgear, and wide be also headgear height；" erecting " width is the width of crotch fork between levels bar, and length is and headgear height adduction headgear thickness；By bottom T-shaped cable paper alignment headgear between levels bar crotch fork hold and one layer of headgear, then take a T-shaped cable paper and wrap one layer along opposite again.
4, with wide medical white glue cloth along crotch fork upwards wrapping one layer between the line of rabbet joint rod of front and back, respectively being wrapped up one layer by crotch fork lower end between levels bar to angle, 45 degree of both sides again, same method wraps one layer again, it is desirable to the interspersed overlap joint of each layer white glue cloth, the lap of splice is not less than 15mm, will and obturage bottom headgear.
5, also headgear facade entirety wrapping up two-layer with wide medical white glue cloth, facade white glue cloth and the bottom surface white glue cloth lap of splice are not less than 15mm, with hands by the white glue cloth compacting of all wrappings.
6, make asbestos putty with asbestos wool, select common asbestos wool to reduce cost, incite somebody to action with the asbestos putty become reconciled and all seal around headgear, seal tightly, during envelope asbestos putty, the joint needing weldering is once carried out, for the adjacent joint not welded, with asbestos cloth every good, it is prevented that damage splice insulation.
Three) soldering tip
1, during plumb joint, first clean a lower contact with hairbrush, also headgear spills some Colophonium powder, process of heating is continuously added scolding tin and Colophonium, until added scolding tin illustrates that joint scolding tin has been filled with when no longer penetrating into and do not emit bubble, when joint soon welds, put into Colophonium powder, and headgear two, fill and lead up with scolding tin.
2, after being soldered joint, scolding tin needs full, smooth surface, removes clean by the scolding tin being attached to outside joint.
3, measuring joint D.C. resistance, it is qualified for recording DC resistance less than 4 micro-ohms.
A kind of generator unit stator winding upper connection connector box perfusion method for blocking, it is characterised in that step is as follows:
One) prepare
1, checking that insulation booth answers flawless, bubble, wall thickness is consistent and is not less than 3mm, is thoroughly cleaned up by insulation booth inwall with ethanol.
2, thoroughly clean with ethanol blank area dirty and and headgear welding time cotton mud and foreign material.
Two) closure
1, go out notch place pad rag in levels bar to be hidden in all gaps, in order to clear up after potting compound seepage.
2, E type inserted sheet is made with 1mm thickness epoxy plate, size is just can insert and below headgear, levels bar crotch fork is advisable, with two pieces of E type inserted sheets to being inserted in and below headgear between levels bar crotch fork, it is determined that good highly and level, urgent with wedge shape negative and positive timber wedge below, hold epoxy plate.
3, block space between epoxy plate and bar with closure putty, during closure, note dynamics, in case the displacement of E type inserted sheet.
4, insulation booth is enclosed within and headgear on, insulation booth wants uniform with the gap of also headgear, range estimation insulation booth end opening and E type blade contact position, mention insulation booth, between insulation booth end opening and E type blade contact face, pad puts one layer of " gasket seal " made with closure putty, the light compacting of insulation booth have gentle hands put back to by gasket seal after carrying out, note dynamics during pressure, it is prevented that overexerts and makes E type inserted sheet conjugate.
Three) insulation booth perfusion
1, block after putty solidification until base opening, 881A potting compound is heated to 40 degrees Celsius and stirs, then add 881B potting compound to be sufficiently stirred for immediately, so as to mix homogeneously, then pour into respectively in the insulation booth sealing base opening, note first injecting potting compound thicker on a small quantity when irrigating, observe after 30 minutes with or without Seepage, again by potting compound filling to connector box top slowly after ne-leakage, with without trickling phenomenon for standard, note observing potting compound with or without sinkage simultaneously.
2, after insulation booth potting compound solidifies, if glue surface is suitable for reading lower than insulation booth, should mend in insulation booth and fill out potting compound to being full of insulation booth, after insulation booth perfusion, should not have penetrability pore and crackle.
3, insulation booth potting compound carries out after solidifying overflowing potential test, it is desirable to it is qualified for overflowing current potential below 1000 volts.
Carry out upper end with cable paper with medical white glue cloth weld front closure and adopt timber wedge block and E type epoxy plate to carry out the front blocking technology of insulation booth perfusion, preferably resolve the difficult problems such as closure difficulty is loaded down with trivial details with construction.
Now adopting cable paper and the wrapping of medical white glue cloth, the method reinforced with asbestos putty blocks, and well solves Lou stannum problem.
Timber wedge block is now adopted to support, E type epoxy plate grafting method for blocking, simple, convenient and efficient.
The invention have the advantage that 1, repair quality is good, efficiency is high.Change the speed caused with single traditional method closure slow, ropy shortcoming, the brewed asbestos putty of conventional asbestos board that blocks before welding blocks, owing to density is inadequate, pressure-bearing property is poor, when scolding tin pressure reaches to a certain degree, and the asbestos putty bottom headgear is easy to produce gap with also headgear so that scolding tin leaks outside.The simple insulation booth with epoxy putty closure in the past, owing to the space between levels bar is relatively big, the epoxy putty of closure can depart from insulation booth under self gravitation effect, produces gap, causes that insulating cement leaks outside.Leak stopping is the difficult point in these two work, sometimes even needs the closure repeatedly of five or six times.Can not again block after leakage stannum at once, after need to waiting until that closing on joint is soldered, in order to avoid damaging, when removing leakage stannum joint asbestos putty, the asbestos putty closing on joint, also need joint cooling by the time, this just makes work efficiency be greatly lowered, and clears up the scolding tin spilt simultaneously and is also required to substantial amounts of time and efforts.The repairing of leakage glue need to wait until that the closure putty of mending-leakage solidifies, and closure putty solidifies the six hours times of need, add after encapsulating etc. to be seen, repairing several times will waste a lot of time, and leak the cleaning of glue and also need the cost plenty of time.New method disposable can be welded after adopting, irrigated successfully, and quality and efficiency are greatly improved.2, security and stability is high.Before the welding of conventional upper end, stannum is very easily leaked in closure, the cleaning of leakage stannum is very difficult, if the scolding tin cleaning leaked outside is unclean and is retained between adjacent bar or between bar and iron core gap, by the insulation of serious threat bar, bury greatly hidden danger for equipment safety operation；The joint of failure welding generates heat at unit operation center tap, if finding not in time and place comprehends and causes joint fusing, overhang insulation to burn, causes generator unit stator open circuit, ground connection or short trouble, and consequence is serious, loses great.The harm of leakage glue is also very big, and leakage glue drops down the ventilation and heat radiation that can affect stator on iron core, and leakage glue drops down in stator core slot, and to next time, the replacing beating again especially bar of slot wedge increases great difficulty.Use the joint of new method welding and the insulation booth substantially once success of perfusion, avoid the harm of Lou stannum and leakage adhesive tape, operation there is not once overheated, crackle, creepage phenomenon, the effective safety and stability performance improving unit, it is ensured that the safe operation of equipment.3, technique is simple and direct practical.The simple and direct practicality of new technology, well solve Lost circulation problems, it is to avoid the phenomenon repeatedly done over again because of leakage stannum, leakage glue, has won valuable time for service work, has also saved material, expense and labour force simultaneously, has been worth hydroelectric power plant to promote and uses.4, reduce cost and improve economic benefit.The accident that generator unit stator joint occurs because of failure welding is a lot, if finding in time, to process proper, can avoid the expansion that causes the accident, otherwise, cause overhang insulation to burn owing to accident spreads expansion, consequence is serious, loses great, is difficult to recover for the moment.The joint quality that new technology makes is good, one-shot forming, shorten maintenance duration and add economic benefit, for instance in maintenance, change 59 stator bars, maintenance duration 17 days altogether, if taking around 6 day duration according to conventional bar weld and insulation booth instillation process, selecting new method only to use 3 days just to complete this work, having won the 3 day time of preciousness, putting into operation for unit on schedule and provide guarantee, the economic benefit directly or indirectly created for enterprise cannot be estimated.
Below in conjunction with accompanying drawing, embodiments of the present invention are described in further detail.
Accompanying drawing explanation
Fig. 1 is cutting asbestos cloth strip mouth structure sketch of the present invention.
Fig. 2 is the T-shaped cable paper structure diagram of the present invention.
Fig. 3 is E type epoxy plate plate-inserting structure sketch.
Fig. 4 is and headgear parcel insulating paper, medical proof fabric, asbestos putty structure diagram.
Fig. 5 is and headgear installs insulation booth additional and with E shape inserted sheet and timber wedge fixed structure sketch.
Detailed description of the invention
Referring to Fig. 1,2,3,4,5, parts title is as follows: T-shaped cable paper 1, asbestos putty 2, stator bar end 3, and headgear 4, epoxy putty pad 5, insulation booth 6, negative and positive timber wedge 7, E type inserted sheet 8, asbestos cloth 9.
Embodiment 1
Generator unit stator winding upper connection welding method
One, closure before upper end welding
One) preparation:
1, stator end and gap are cleaned up.
2, carefully clear up bar joint area with acetone, it is necessary to thoroughly remove the remaining glue of joint surface, oxide layer and other dirt, see true qualities with 0# sand paper and brass wire brush polishing bar joint, and clean with alcohol washes.
3, with shaping tool, upper and lower layer line rod lead riser being corrected alignment, left and right tolerance is less than 5mm.
4, correct in qualified rear enclosure and headgear, load copper wedge, copper cash and and headgear between gap be generally no greater than 0.3mm.
5, with specific purpose tool locking pliers will and after headgear and bar strand combine closely, then cut winding termination redundance copper cash with crop instrument, make and headgear top simultaneously.
Two) closure:
1, asbestos cloth being cut into corresponding size, on asbestos cloth, spacing and width according to also headgear end face cut strip mouth, are enclosed within and on headgear, use hands compacting after packaging, it is ensured that asbestos cloth and bar close contact.
2, tight with soaking asbestos cloth plug between stator upper and lower layer line rod and between adjacent bar, it is prevented that solder is fallen in iron core slot, and asbestos cloth is not easily overly wet, in order to avoid water droplet instills bar and makes stator make moist.
3, cable paper is cut into T-shaped, and " horizontal stroke " length is and the girth of headgear, and wide be also headgear height；" erecting " width is the width of crotch fork between levels bar, and length is and headgear height adduction headgear thickness；By bottom T-shaped cable paper alignment headgear between levels bar crotch fork hold and one layer of headgear, then take a T-shaped cable paper and wrap one layer along opposite again.
4, with wide medical white glue cloth along crotch fork upwards wrapping one layer between the line of rabbet joint rod of front and back, respectively being wrapped up one layer by crotch fork lower end between levels bar to angle, 45 degree of both sides again, same method wraps one layer again, it is desirable to the interspersed overlap joint of each layer white glue cloth, the lap of splice is not less than 15mm, will and obturage bottom headgear.
5, also headgear facade entirety wrapping up two-layer with wide medical white glue cloth, facade white glue cloth and the bottom surface white glue cloth lap of splice are not less than 15mm, with hands by the white glue cloth compacting of all wrappings.
6, asbestos putty is made with asbestos wool, select common asbestos wool to reduce cost, to with the asbestos putty become reconciled and all seal around headgear, seal tightly, during envelope asbestos putty, the joint needing weldering is once carried out, for the adjacent joint not welded, with asbestos cloth every good, preventing damage splice insulation, asbestos putty height has not interfered with to heat and has been advisable.See Fig. 4.
Three) soldering tip:
1, during plumb joint, first clean a lower contact with hairbrush, also headgear spills some Colophonium powder, process of heating is continuously added scolding tin and suitable Colophonium, until added scolding tin illustrates that joint scolding tin has been filled with when no longer penetrating into and do not emit bubble, when joint soon welds, put into some Colophonium powder, and headgear two, fill and lead up with scolding tin.
2, after being soldered joint, scolding tin needs full, smooth surface, removes clean by the scolding tin being attached to outside joint.
3, measuring joint D.C. resistance, our factory requires that it is qualified for recording DC resistance less than 4 micro-ohms.
Embodiment 2
Generator unit stator winding upper connection connector box perfusion method for blocking.
Referring to Fig. 5, the closure before top connection box encapsulating.
One) prepare:
1, checking that insulation booth answers flawless, bubble, wall thickness is consistent and is not less than 3mm, is thoroughly cleaned up by insulation booth inwall with ethanol.
2, thoroughly clean with ethanol blank area dirty and and headgear welding time cotton mud and foreign material.
Two) closure:
1, go out notch place pad rag in levels bar to be hidden in all gaps, in order to clear up after potting compound seepage.
2, E type inserted sheet is made with 1mm thickness epoxy plate, size is just can insert and below headgear, levels bar crotch fork is advisable, with two pieces of E type inserted sheets to being inserted in and below headgear between levels bar crotch fork, it is determined that good highly and level, urgent with wedge shape negative and positive timber wedge below, hold epoxy plate.
3, block space between epoxy plate and bar with closure putty HDJ-18, during closure, note dynamics, in case the displacement of E type inserted sheet.
4, insulation booth is enclosed within and headgear on, insulation booth wants uniform with the gap of also headgear, range estimation insulation booth end opening and E type blade contact position, mention insulation booth, between insulation booth end opening and E type blade contact face, pad puts one layer with blocking putty HDJ-18 " gasket seal " made, the light compacting of insulation booth have gentle hands put back to by gasket seal after carrying out, note dynamics during pressure, it is prevented that overexerts and makes E type inserted sheet conjugate.See Fig. 5.
Three) insulation booth perfusion:
1, block after putty HDJ-18 solidification until base opening, appropriate 881A potting compound is heated to 40 degrees centigrade and stirs, then add 881B potting compound to be sufficiently stirred for immediately, so as to mix homogeneously, then pour into respectively in the insulation booth sealing base opening, note first injecting potting compound thicker on a small quantity when irrigating, observe after 30 minutes with or without Seepage, again by potting compound filling to connector box top slowly after ne-leakage, with nothing trickling phenomenon for standard, note observing potting compound with or without sinkage simultaneously.
2, after insulation booth potting compound solidifies, if glue surface is suitable for reading lower than insulation booth, should mend in insulation booth and fill out potting compound to being full of insulation booth, after insulation booth perfusion, should not have penetrability pore and crackle.
3, insulation booth potting compound carries out after solidifying overflowing potential test, and our factory requires that it is qualified for overflowing current potential below 1000 volts.
Being described above, simply the specific embodiment of the present invention, the flesh and blood of the present invention is not construed as limiting by various illustrations.
Claims (2)
1. a generator unit stator winding upper connection welding method, it is characterised in that step is as follows:
One, closure before upper end welding
One) preparation:
(1) stator end and gap are cleaned up；
(2) carefully clear up bar joint area with acetone, thoroughly remove the remaining glue of joint surface, oxide layer and other dirt, see true qualities with 0# sand paper and brass wire brush polishing bar joint, and clean with alcohol washes；
(3) with shaping tool, upper and lower layer line rod lead riser being corrected alignment, left and right tolerance is less than 5mm；
(4) correct in qualified rear enclosure and headgear, load copper wedge, copper cash and also gap≤0.3mm between headgear；
(5) with locking pliers will and after headgear and bar strand combine closely, then cut winding termination redundance copper cash with crop instrument, make and headgear top simultaneously；
Two) closure:
(1) asbestos cloth being cut into correspondingly-sized, on asbestos cloth, spacing and width according to also headgear end face cut strip mouth, are enclosed within and on headgear, use hands compacting after packaging, it is ensured that asbestos cloth and bar close contact；
(2) tight with soaking asbestos cloth plug between stator upper and lower layer line rod and between adjacent bar, it is prevented that solder is fallen in iron core slot；
(3) cable paper is cut into T-shaped, and " horizontal stroke " length is the girth of also headgear, and wide is and headgear height that " erecting " width is the width of crotch fork between levels bar, and length is and headgear height adduction headgear thickness；By bottom T-shaped cable paper alignment headgear between levels bar crotch fork hold and one layer of headgear, then take a T-shaped cable paper and wrap one layer along opposite again；
(4) with wide medical white glue cloth along crotch fork upwards wrapping one layer between the line of rabbet joint rod of front and back, respectively being wrapped up one layer by crotch fork lower end between levels bar to angle, 45 degree of both sides again, same method wraps one layer again, it is desirable to the interspersed overlap joint of each layer white glue cloth, the lap of splice >=15mm, will and obturage bottom headgear；
(5) also headgear facade entirety wrapping up two-layer with wide medical white glue cloth, facade white glue cloth and the bottom surface white glue cloth lap of splice are not less than 15mm, with hands by the white glue cloth compacting of all wrappings；
(6) make asbestos putty with asbestos wool, with the asbestos putty become reconciled will and headgear around all seal, seal tightly, during envelope asbestos putty, the joint needing weldering once carried out, for the adjacent joint not welded, with asbestos cloth every good, it is prevented that damage splice insulation；
Three) soldering tip:
(1) during plumb joint, first clean a lower contact with hairbrush, also headgear spills some Colophonium powder, process of heating is continuously added scolding tin and Colophonium, until added scolding tin illustrates that joint scolding tin has been filled with when no longer penetrating into and do not emit bubble, when joint soon welds, put into Colophonium powder, and headgear two, fill and lead up with scolding tin；
(2) after being soldered joint, scolding tin needs full, smooth surface, removes clean by the scolding tin being attached to outside joint；
(3) measuring joint D.C. resistance, it is qualified for recording DC resistance≤4 micro-ohm.
2. a generator unit stator winding upper connection connector box perfusion method for blocking, it is characterised in that step is as follows:
One) prepare
(1) checking that insulation booth answers flawless, bubble, wall thickness is consistent and >=3mm, is thoroughly cleaned up by insulation booth inwall with ethanol；
(2) thoroughly clean with ethanol blank area dirty and and headgear welding time cotton mud and foreign material；
Two) closure
(1) go out notch place pad rag in levels bar to be hidden in all gaps, in order to clear up after potting compound seepage；
(2) E type inserted sheet is made with 1mm thickness epoxy plate, size is just can insert and below headgear, levels bar crotch fork is advisable, with two pieces of E type inserted sheets to being inserted in and below headgear between levels bar crotch fork, it is determined that good highly and level, urgent with wedge shape negative and positive timber wedge below, hold epoxy plate；
(3) space between epoxy plate and bar is blocked with closure putty；
(4) insulation booth is enclosed within and headgear on, insulation booth wants uniform with the gap of also headgear, range estimation insulation booth end opening and E type blade contact position, mention insulation booth, between insulation booth end opening and E type blade contact face, pad puts one layer of " gasket seal " made with closure putty, and the light compacting of insulation booth have gentle hands put back to by gasket seal after carrying out；
Three) insulation booth perfusion
(1) block after putty solidification until base opening, 881A potting compound is heated to 40 degrees Celsius and stirs, then add 881B potting compound to be sufficiently stirred for immediately, so as to mix homogeneously, then pour into respectively in the insulation booth sealing base opening, note first injecting thicker potting compound when irrigating, observe after 30 minutes with or without Seepage, again by potting compound filling to connector box top slowly after ne-leakage, with without trickling phenomenon for standard, note observing potting compound with or without sinkage simultaneously；
(2) after insulation booth potting compound solidifies, if glue surface is suitable for reading lower than insulation booth, should mend in insulation booth and fill out potting compound to being full of insulation booth, after insulation booth perfusion, should not have penetrability pore and crackle；
(3) insulation booth potting compound carries out after solidifying overflowing potential test, it is desirable to it is qualified for overflowing current potential below 1000 volts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610288205.3A CN105743293A (en) | 2016-05-05 | 2016-05-05 | Upper joint welding and joint box pouring plugging method for power generator stator winding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610288205.3A CN105743293A (en) | 2016-05-05 | 2016-05-05 | Upper joint welding and joint box pouring plugging method for power generator stator winding |
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| CN105743293A true CN105743293A (en) | 2016-07-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685121A (en) * | 2017-01-16 | 2017-05-17 | 嘉兴市大成电气新材料有限公司 | Flexible plug sleeve for vertical hydraulic generator stator coil bar lead insulation box and assembly method of flexible plug sleeve |
| CN106787526A (en) * | 2017-03-30 | 2017-05-31 | 上海电气集团上海电机厂有限公司 | A kind of manufacture craft of brushless low speed synchromotor insulation booth infusion epoxy resin glue |
| CN111313298A (en) * | 2020-03-09 | 2020-06-19 | 岭东核电有限公司 | Method for overhauling pouring type current transformer for nuclear power station |
-
2016
- 2016-05-05 CN CN201610288205.3A patent/CN105743293A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 冯朝波: "发电机定子绕组上部接头焊接及接头盒灌注封堵工艺", 《水电自动化与大坝监测》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106685121A (en) * | 2017-01-16 | 2017-05-17 | 嘉兴市大成电气新材料有限公司 | Flexible plug sleeve for vertical hydraulic generator stator coil bar lead insulation box and assembly method of flexible plug sleeve |
| CN106685121B (en) * | 2017-01-16 | 2023-12-05 | 浙江博菲电气股份有限公司 | Flexible plugging sleeve for vertical hydraulic generator stator bar lead insulation box and assembly method thereof |
| CN106787526A (en) * | 2017-03-30 | 2017-05-31 | 上海电气集团上海电机厂有限公司 | A kind of manufacture craft of brushless low speed synchromotor insulation booth infusion epoxy resin glue |
| CN106787526B (en) * | 2017-03-30 | 2019-03-29 | 上海电气集团上海电机厂有限公司 | A kind of manufacture craft of brushless low speed synchromotor insulation booth infusion epoxy resin glue |
| CN111313298A (en) * | 2020-03-09 | 2020-06-19 | 岭东核电有限公司 | Method for overhauling pouring type current transformer for nuclear power station |
| CN111313298B (en) * | 2020-03-09 | 2021-05-25 | 岭东核电有限公司 | Method for overhauling pouring type current transformer for nuclear power station |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20171031 Address after: 100033 West Chang'an Avenue, Beijing, No. 86, No. Applicant after: State Grid Corporation of China Applicant after: State Grid Xinyuan Hydropower Co., Ltd. Applicant after: Songhua River hydropower generation Co., Ltd. Jilin Baishan power plant Address before: 100033 West Chang'an Avenue, Beijing, No. 86, No. Applicant before: State Grid Corporation of China Applicant before: State Grid Xinyuan Hydropower Co., Ltd. Applicant before: Baishan Power Plant |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160706 |