CN106300819B - Insulation restorative procedure with high electricapparatus intensity - Google Patents
Insulation restorative procedure with high electricapparatus intensity Download PDFInfo
- Publication number
- CN106300819B CN106300819B CN201610702011.3A CN201610702011A CN106300819B CN 106300819 B CN106300819 B CN 106300819B CN 201610702011 A CN201610702011 A CN 201610702011A CN 106300819 B CN106300819 B CN 106300819B
- Authority
- CN
- China
- Prior art keywords
- insulation
- reparation
- nomex
- shaped
- trade mark
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a kind of insulation restorative procedure with high electricapparatus intensity, in normal operation of the steam turbine generator in life cycle, stator bar can inevitably be caused to insulate or the breakage of rotor leading wire insulation etc. or even broken pressure because of various accidentalia.In repair process; thorough cleaning nearby is carried out to broken pressure point first; simultaneously for the location and shape of breaking point; it makes and is suitble to repair the U-shaped insulation for breaking pressure point; after clearing up broken pressure point and filling gap reparation; by U-shaped insulation sleeve outside broken pressure point, it is used in combination bonded adhesives to fix, damaged part is repaired and is protected.The insulation after reparation in this way not only has higher electrical strength, and mechanical strength is also very high, especially in the case where rotor centrifuges force effect with high rotational speed, can prevent the secondary damage of weak part after repairing, it is ensured that repairing quality.
Description
Technical field：The present invention relates to a kind of insulation restorative procedures with high electricapparatus intensity.
Background technology：In normal operation of the steam turbine generator in life cycle, inevitably can because of it is various it is accidental because
Element causes the breakage of stator bar insulation or rotor leading wire insulation etc. or even broken pressure.In conventional insulation restorative procedure, need
Broken parts are removed according to the inverted sequence of offline sequence, reinstalls and tests according still further to normal procedure after the completion of reparation,
Virtually, so that repairing efficiency is significantly extended, in turn result in unnecessary cost allowance.Method using the present invention is repaiied
Multiple damaged insulation, can be such that bar or lead is repaired in unit, save remove and return dress it is long when process, improve
Remediation efficiency.In addition, the insulation after repairing in this way, not only has higher electrical strength, mechanical strength is also very high, and
With certain toughness, especially in the case where rotor centrifuges force effect with high rotational speed, the secondary damage of weak part after repairing can be prevented
Wound, it is ensured that repairing quality.
Invention content：The object of the present invention is to provide a kind of with the insulation restorative procedure with high electricapparatus intensity,
Can the time it is short, efficiently complete reparation task, reduce repair position secondary damage possibility.
The technical solution that the present invention takes is：
A. it is cleared up firstly the need of to damaged area, it is all adjoint during the even broken pressure of damaged under normal circumstances, scaling loss
The high-temperature heating for insulation is even burnt, when cleaning need to by burnt carbon dust, cross heat insulation complete liquidation and fall, dust catcher is used in combination
It is all sucked out, it is ensured that there is no remaining discharge channel after cleaning；
B. it needs to be determined the shape and size of breaking point, if restoring area is straightway, measures the length of breaking point
Wide size in addition to the length and width dimensions of breaking point, also needs the curvature for measuring breaking point and surrounding if restoring area is curved section；
C. the size to be insulated according to the U-shaped of the size design reparation of measurement, and U-shaped insulation is found or made according to size
Mold spare unit component can be used as mold if any spare unit component identical with remanufactured component；
D. U-shaped insulation is made on the mold chosen, the selection single side gluing trade mark is the composite-insulating paper of Nomex as U
The base material of shape insulation can especially be centrifuged the position after force effect, or reparation when repaiied position in normal operation by high rotating speed
Outer force effect can be continually born, to further increase the toughness after repairing, the trade mark is the number of plies root of the composite-insulating paper of Nomex
It is determined according to required proof voltage grade after reparation, the composite-insulating paper number of plies and proof voltage hierarchical relationship that the general trade mark is Nomex
For, proof voltage 8.0kV and hereinafter, the trade mark is 1 layer of the composite-insulating paper half-lap of Nomex；Proof voltage 15kV and hereinafter, the trade mark is
2 layers of the composite-insulating paper half-lap of Nomex；Proof voltage 20kV and hereinafter, the trade mark be Nomex 4 layers of composite-insulating paper half-lap,
Meet withstand voltage value after repairing, also need to consider U-shaped insulation itself along face size i.e. arcing distance, U-shaped insulation will be before making
Demoulding processing is carried out between mold and U-shaped insulation, the compound inslation paper layer and interlayer brushing adhesive strength that the trade mark is Nomex are high to be glued
Glue is connect, after bonded adhesives is fully cured, U-shaped insulation completes；
E. reparation is filled to the damaged area after cleaning with Shao Jiao mica powders teeter chamber temperature epoxy glue, in repair process
It should be noted that centainly the insulated part of missing is tamped, it is ensured that repair the shape ruler after not having air dielectric, filling to repair in insulation
It is very little to be flushed in original configuration size；
F. after room temperature epoxy glue used in reparation to be filled is fully cured, 3 faces of U-shaped insulating inner for will making
The high bonded adhesives of brushing adhesive strength, and be buckled on breaking point, it is ensured that breaking point is located at the geometric center position of U-shaped insulation, waits for
Bonded adhesives is fully cured, and breakage is repaired and finished.
The solution have the advantages that：
1) method is convenient, repair time is short
In conventional insulation restorative procedure, often due to it is limited to repair space, it has to by broken parts according to offline suitable
The inverted sequence of sequence removes, and is reinstalled according still further to normal procedure after the completion of reparation, significantly extends repairing efficiency, waste
A large amount of manpower and materials, have in turn resulted in unnecessary cost allowance.Method using the present invention repairs damaged insulation, filling
It repairs and U-shaped insulation repairs to overcome and repairs the small problem in space, removed without that will repair to lose, bar can be made or drawn
Line is repaired in unit, save remove and return dress it is long when process, improve remediation efficiency.
2) reparation material used is simple, rehabilitation cost is low
The used trade mark is Nomex in repair process composite-insulating paper, bonded adhesives, few glue mica powder etc. are power generation
Machine manufactures extremely common material, and material acquiring way is wide, and the cost of material is low.
3) repairing quality is good, prevents secondary damage
In common repair methods, often only focus on the reparation of electrical strength, but ignores mechanical strength, in this way
Reparation after insulation, not only there is higher electrical strength, mechanical strength is also very high, repairs the raw material trade mark used and is
There is composite-insulating paper of Nomex itself certain toughness can prevent from repairing especially in the case where rotor centrifuges force effect with high rotational speed
The secondary damage of weak part after multiple, it is ensured that repairing quality, and common repair methods often ignore this point.
The present invention repairs for insulation provides a method for annexing electrical strength and mechanical strength, this restorative procedure uses
The trade mark be Nomex composite-insulating paper, epoxy glue, mica powder etc. be extremely common and very honest and clean during generator manufacture
The material of valence, therefore rehabilitation cost is very low；The required reparation space of this restorative procedure is small, without removing remanufactured component
Repaired, save remove and return dress it is long when process, therefore repair time is short；This restorative procedure use filling insulation and
After the reparation of U-shaped insulation, electrical strength and mechanical strength with high intensity, therefore rear stability height is repaired, especially in rotor
Irreplaceable effect can be played in lead reparation.The present invention has good application prospect, is the safety of steam turbine generator
Operation lays the foundation.
Fig. 1 is present invention process block diagram
Fig. 2 is renovation technique display diagram
Specific implementation mode：
A. as shown in Figure 1, by taking the reparation of bar insulation 1 as an example, it is necessary first to clear up damaged area 2, ordinary circumstance
It is all even burnt along with the high-temperature heating of insulation during the even broken pressure of lower damaged, scaling loss, when cleaning need to by burnt carbon dust,
It crosses heat insulation complete liquidation to fall, dust catcher is used in combination all to be sucked out, it is ensured that there is no remaining discharge channel after cleaning；
B. it needs to be determined the shape and size of breaking point, if restoring area is straightway, measures the length of breaking point
Wide size in addition to the length and width dimensions of breaking point, also needs the curvature for measuring breaking point and surrounding if restoring area is curved section；
C. the size to be insulated according to the U-shaped of the size design reparation of measurement, and U-shaped insulation is found or made according to size
Mold spare unit component can be used as mold if any spare unit component identical with remanufactured component；
D. U-shaped insulation is made on the mold chosen, the selection single side gluing trade mark is the composite-insulating paper of Nomex as U
The base material of shape insulation can especially be centrifuged the position after force effect, or reparation when repaiied position in normal operation by high rotating speed
Outer force effect can be continually born, to further increase the toughness after repairing, the trade mark is the number of plies root of the composite-insulating paper of Nomex
It is determined according to required proof voltage grade after reparation, the composite-insulating paper number of plies and proof voltage hierarchical relationship that the general trade mark is Nomex
For, proof voltage 8.0kV and hereinafter, the trade mark is 1 layer of the composite-insulating paper half-lap of Nomex；Proof voltage 15kV and hereinafter, the trade mark is
2 layers of the composite-insulating paper half-lap of Nomex；Proof voltage 20kV and hereinafter, the trade mark be Nomex 4 layers of composite-insulating paper half-lap,
Meet withstand voltage value after repairing, also need to consider U-shaped insulation itself along face size i.e. arcing distance, U-shaped insulation will be before making
Demoulding processing is carried out between mold and U-shaped insulation, the compound inslation paper layer and interlayer brushing adhesive strength that the trade mark is Nomex are high to be glued
Glue is connect, after bonded adhesives is fully cured, U-shaped insulation completes；
E. the damaged area after cleaning is filled with Shao Jiao mica powders teeter chamber temperature epoxy glue formation filler 3 and is repaiied
It is multiple, it should be noted that centainly tamping the insulated part of missing in repair process, it is ensured that repairing in insulation does not have air dielectric, fills
Appearance and size after reparation should be flushed in original configuration size；
F. after room temperature epoxy glue used in reparation to be filled is fully cured, by 4 inside 3 of the U-shaped made insulation
The high bonded adhesives of face brushing adhesive strength, and be buckled on breaking point, it is ensured that breaking point is located at the geometric center position of U-shaped insulation,
Wait for that bonded adhesives is fully cured, breakage repairs and finishes 5.
In conclusion this invention is repaired for insulation provides a method for annexing electrical strength and mechanical strength, this
Method rehabilitation cost is low, repairs short time limit, repairs rear stability height, has good application prospect, is the peace of steam turbine generator
Row for the national games lays the foundation.
Claims (1)
1. a kind of insulation restorative procedure with high electricapparatus intensity, it is characterized in that：
A. it is cleared up firstly the need of to damaged area, all along with exhausted during the even broken pressure of damaged under normal circumstances, scaling loss
The high-temperature heating of edge is even burnt, when cleaning need to by burnt carbon dust, cross heat insulation complete liquidation and fall, be used in combination dust catcher whole
It is sucked out, it is ensured that there is no remaining discharge channel after cleaning；
B. it needs to be determined the shape and size of breaking point, if restoring area is straightway, measures the length and width ruler of breaking point
It is very little, if restoring area is curved section, in addition to the length and width dimensions of breaking point, also need the curvature for measuring breaking point and surrounding；
C. the size to be insulated according to the U-shaped of the size design reparation of measurement, and according to the mould of size searching or making U-shaped insulation
Tool, if any spare unit component identical with remanufactured component, can use spare unit component as mold；
D. U-shaped insulation is made on the mold chosen, and selects the composite-insulating paper that the single side gluing trade mark is Nomex exhausted as U-shaped
The base material of edge, the position after repaiied position can be centrifuged force effect, or reparation in normal operation by high rotating speed can be continually
Bear outer force effect, with further increase repair after toughness, the trade mark be Nomex composite-insulating paper the number of plies according to reparation after
Required proof voltage grade determines that the composite-insulating paper number of plies that the trade mark is Nomex and proof voltage hierarchical relationship are proof voltage
8.0kV and hereinafter, the trade mark be Nomex 1 layer of composite-insulating paper half-lap；Proof voltage is more than 8.0kV, is less than or equal to 15kV, board
Number be Nomex 2 floor of composite-insulating paper half-lap；Proof voltage is more than 15kV, is less than or equal to 20kV, and the trade mark is the compound of Nomex
4 layers of insulating paper half-lap, meet repair after withstand voltage value, also need consider U-shaped insulation itself along face size i.e. arcing distance, U
Shape insulation will carry out demoulding processing before making between mold and U-shaped insulation, and the compound inslation paper layer that the trade mark is Nomex is applied with interlayer
The high bonded adhesives of brush adhesive strength, after bonded adhesives is fully cured, U-shaped insulation completes；
E. reparation is filled to the damaged area after cleaning with Shao Jiao mica powders teeter chamber temperature epoxy glue, is noted in repair process
Meaning, centainly tamps the insulated part of missing, it is ensured that repairs the appearance and size after not having air dielectric, filling to repair in insulation and answers
It is flushed with original configuration size；
F. after room temperature epoxy glue used in reparation to be filled is fully cured, 3 faces of U-shaped insulating inner made are brushed
The high bonded adhesives of adhesive strength, and be buckled on breaking point, it is ensured that breaking point is located at the geometric center position of U-shaped insulation, waits being bonded
Glue is fully cured, and breakage is repaired and finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610702011.3A CN106300819B (en) | 2016-08-22 | 2016-08-22 | Insulation restorative procedure with high electricapparatus intensity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610702011.3A CN106300819B (en) | 2016-08-22 | 2016-08-22 | Insulation restorative procedure with high electricapparatus intensity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106300819A CN106300819A (en) | 2017-01-04 |
| CN106300819B true CN106300819B (en) | 2018-08-21 |
Family
ID=57662362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610702011.3A Active CN106300819B (en) | 2016-08-22 | 2016-08-22 | Insulation restorative procedure with high electricapparatus intensity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106300819B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586519B (en) * | 2017-09-29 | 2022-06-21 | 上海宝钢工业技术服务有限公司 | Quick repair method for insulation damage of variable-frequency high-voltage motor winding |
| CN110707614B (en) * | 2019-09-19 | 2020-11-13 | 宁波东方电缆股份有限公司 | Method for repairing flexible mineral insulated cable with metal outer sheath |
| 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 |
| CN112688497A (en) * | 2020-12-18 | 2021-04-20 | 江苏中车电机有限公司 | Insulation repairing method for contact part of motor end ring and fixed seat |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103401377A (en) * | 2013-07-29 | 2013-11-20 | 哈尔滨电机厂有限责任公司 | Method for manufacturing stator coil insulation structure of tidal current generator |
| CN103401335A (en) * | 2013-07-31 | 2013-11-20 | 东方电气（乐山）新能源设备有限公司 | Doubly-fed wind-driven generator insulation system and manufacturing method thereof |
-
2016
- 2016-08-22 CN CN201610702011.3A patent/CN106300819B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103401377A (en) * | 2013-07-29 | 2013-11-20 | 哈尔滨电机厂有限责任公司 | Method for manufacturing stator coil insulation structure of tidal current generator |
| CN103401335A (en) * | 2013-07-31 | 2013-11-20 | 东方电气（乐山）新能源设备有限公司 | Doubly-fed wind-driven generator insulation system and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106300819A (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106300819B (en) | Insulation restorative procedure with high electricapparatus intensity | |
| CN204912136U (en) | Cleaning appliance | |
| CN109586519B (en) | Quick repair method for insulation damage of variable-frequency high-voltage motor winding | |
| CN106374690B (en) | Large generator stator bar insulation field repairing method | |
| Stone et al. | Impact of slot discharges and vibration sparking on stator winding life in large generators | |
| WO2008038349A1 (en) | Electric dust collector, discharge electrode, method for producing the discharge electrode, and method for producing discharge needle | |
| JP2014143908A (en) | Field coil winding assembly | |
| CN103545750A (en) | Method for repairing composite insulator testing sampling part | |
| JP5892438B2 (en) | Insulator and air cleaner using the same | |
| CN102318170A (en) | Method for removing an electrically insulating powder layered on a stator core, device for performing the method, and electric machine having a stator core | |
| CN112204862B (en) | Denture assembly for generator stator core | |
| CN104205586A (en) | Method for repairing a stator | |
| CN106555914A (en) | The large-scale rubber lined pipe renovation technique of nuclear power station | |
| CN202856551U (en) | Generator stator slot wedge maintenance tool with no need for lifting rotor | |
| CN106000954A (en) | Dust removal device used for motor | |
| CN204503683U (en) | A kind of power transmission and transforming equipment cleaning dust absorption device | |
| US10193407B2 (en) | Method for repairing a rotor | |
| CN109955392A (en) | A kind of heat insulation structural method for repairing and mending | |
| JP2017022974A (en) | Dynamoelectric machine main lead servicing | |
| CN107070039B (en) | A kind of motor stator and head position insulation system and insulating method | |
| CN205851434U (en) | A kind of power equipment washer | |
| CN106059209B (en) | Method for repairing abrasion fatigue crack of generator rotor | |
| JP6005480B2 (en) | Method for manufacturing FRP insulated horizontal pipe for supporting train lines | |
| CN104384640A (en) | Method for removing damaged blade of stator component of aero-engine | |
| CN113236893B (en) | Secondary-sealing electric melting pipe fitting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |