CN110518762A - A kind of stator bar lacks glue insulation Novel heating curing method - Google Patents
A kind of stator bar lacks glue insulation Novel heating curing method Download PDFInfo
- Publication number
- CN110518762A CN110518762A CN201910727961.5A CN201910727961A CN110518762A CN 110518762 A CN110518762 A CN 110518762A CN 201910727961 A CN201910727961 A CN 201910727961A CN 110518762 A CN110518762 A CN 110518762A
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- China
- Prior art keywords
- bar
- stator bar
- impregnating
- tank
- stator
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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
- H02K15/10—Applying solid insulation to windings, stators or rotors
-
- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The present invention discloses a kind of stator bar and lacks glue insulation Novel heating curing method, the present invention can guarantee stator bar lack glue insulation system technical performance index it is constant under the premise of, it can be obviously improved that few glue insulation system stator bar is anti-corona and the globality of entire end, reduce stator bar end size and error, and can make full use of existing resource and improve benefit.
Description
Technical field:
The invention belongs to turbine generator stator bar manufacturing technologies, and it is new to lack glue insulation especially with respect to a kind of stator bar
Type is heating and curing method.
Background technique:
Turbine generator stator bar manufacturing technology is broadly divided into few glue insulation system manufacturing technology and more glue insulation systems
Mould pressing process technology.Mould pressing process is since application time is long, experienced technology relative maturity and the full mold manufacturing line of use
Stick can guarantee the globality of stator bar size.Few glue insulation system conventional fabrication processes technology is made using low resin mica tape
Stator bar insulation thickness can be reduced by making stator bar for main insulating materials, but the domestic application time is relatively short, end
It is not carried out in whole mold in anti-corona section of solidification process, the external heat curing molding by the way of plate plus clip causes to hold
Portion is not good enough compared to the stator bar globality of mould pressing process manufacture, and scale error is larger.
Summary of the invention:
Against the above deficiency, the purpose of the present invention is to provide a kind of stator bars to lack glue insulation Novel heating solidification side
Method lacks glue insulation system using full mold internal heating curing method to stator bar, can guarantee that stator bar lacks glue insulator
The globality and excellent electrical of system save cost and improve benefit.What technical solution of the present invention was realized in the following manner:
1) low resin mica tape, is wrapped up: around the stator bar for making hollow copper wire, using numerical control belting machine by low resin mica tape
Surround on the outside of copper wire as major insulation material over the ground, stator bar main structure is made；
2), dipping lacquer: solvent-free immersion paint is by epoxy resin, anhydride curing agent and three component of promotor composition, by weight
100:90:1 carries out being mixed and made into impregnating varnish；Before dipping, storage paint can is vacuumized, storage paint can vacuum degree is 300Pa~500Pa,
Vacuum system is closed after vacuumizing, vacuum degree is lower than 300Pa, is again started up vacuum system；It is equal that impregnating varnish is preheated to 50 DEG C of stirrings
It is even；Stator bar is preheated to 80 DEG C and is put into tank car, and tank car closes tank door after entering impregnating autoclave and vacuumize to impregnating autoclave true
Reciprocal of duty cycle 10Pa is uniformly inputted impregnating varnish from dipping lacquer pot bottom using storage paint can and impregnating vessel pressure difference, opening conduits valve
In tank car in impregnating vessel, pipeline valve is closed after impregnating varnish input, by the dry compressed air of air compressor to leaching
Paint can is kept for 3 hours after being forced into 0.6MPa, and after the completion of dipping lacquer process of pressurizeing, air in tank is discharged to atmosphere by circulator
In；Bar is placed in tank car under free state in impregnating vessel carries out drop paint processing for 10 minutes, while making pressure inside the tank and big
Bar is hung out tank car by air pressure balance, is placed on bracket and is cleared up extra glue impurity；
3) internal heating curing: wrapping stator bar end Anti-Corona Material；Bar is cleaned out and is coated with mould contact surface
It puts after one layer of silicone grease to molding die, by bar straightway after upper mold, end is close to mold, adjusts active side iron and upper pressure
It properly protects at iron position, first plus-pressure and then stator bar lead and starts to increase temperature, with the temperature rise speed of 1-2 DEG C/min
Degree is started to warm up from temperature 70 C, and moulding pressure is directly warming up to 145 DEG C of heat-insulation pressure keepings 10 hours for 3MPa is latter when rising to 80 DEG C；
4) bar is cleared up: after stator bar insulation solidification, measuring bar sectional dimension, and record, bar is put to cooling
It on platform, cools down 8 hours or more at room temperature, clears up coil edges and corners after cooling and deposit glue, guarantee that bar surface is smooth, and to lead
Head cleaning sanding；
Technical effect:
1) stator bar lacks glue insulation curing process new method
Stator bar lacks glue insulation system manufacturing process technology and low resin mica tape is used to make stator as major insulation material
Bar can reduce stator bar insulation thickness, but the domestic application time is relatively short, and anti-corona section of end solidifies not in entirety
It is carried out in mold, causes stator bar globality not good enough, end size error is larger.
Under the premise of the present invention can guarantee that few glue insulation system stator bar technical performance index is constant, can obviously it change
Kind few glue insulation system stator bar is anti-corona and the globality of entire end, reduces stator bar end size and error, and
It can make full use of existing resource to improve benefit.
2) turbine-generator units stator winding end corona performance is improved
Stator bar of the present invention, which lacks glue insulation Novel heating curing method, makes few glue insulation system stator bar in full mold
In the case of internal heating curing form, reduce stator bar end size.Make hydrogenerator prototype stator winding end distance
Become smaller and more uniform；The performance that stator winding end inhibits corona is improved, to guarantee unit safety stable operation.
Detailed description of the invention:
Fig. 1 is stator bar insulation internal heating curing method and process flow chart.
Specific embodiment:
As shown in Figure 1, a kind of stator bar lacks glue insulation Novel heating curing method, include the following steps:
1, low resin mica tape is wrapped up: around the stator bar for making hollow copper wire, using numerical control belting machine by low resin mica tape
Surround on the outside of copper wire as major insulation material over the ground, stator bar main structure is made.
2, dipping lacquer: solvent-free immersion paint is by epoxy resin, anhydride curing agent and three component of promotor composition, by weight
100:90:1 carries out being mixed and made into impregnating varnish；Before dipping, will storage paint can need to vacuumize, storage paint can vacuum degree for 300Pa~
500Pa, closes vacuum system after vacuumizing, vacuum degree is lower than 300Pa, is again started up vacuum system；Impregnating varnish is preheated to 50 DEG C
It stirs evenly；Stator bar is preheated to 80 DEG C and is put into tank car, and tank car is closed tank door after entering impregnating autoclave and taken out to impregnating autoclave
Vacuum vacuum degree 10Pa, it is using storage paint can and impregnating vessel pressure difference, opening conduits valve that impregnating varnish is uniform from dipping lacquer pot bottom
Input impregnating vessel in tank car in, after impregnating varnish input, added by the dry compressed air of air compressor to impregnating vessel
It is kept for 3 hours after being depressed into 0.6MPa, after the completion of dipping lacquer process of pressurizeing, air in tank is discharged in atmosphere by circulator；Line
Stick is placed in tank car under free state in impregnating vessel carries out drop paint processing for 10 minutes, while flattens pressure inside the tank and atmosphere
Weighing apparatus, hangs out tank car for bar, is placed on bracket and clears up the impurity such as extra glue；
3, internal heating curing: stator bar end Anti-Corona Material is wrapped up as required；Bar is put after being ready to molding die
Interior, by bar straightway after upper mold, end is close to mold, adjusts active side iron and upper weight position, and first plus-pressure is then fixed
It properly protects at sub-line stick lead and starts to increase temperature, by molding parameters cure under pressure.
4, bar is cleared up: after stator bar solidification, measuring bar sectional dimension, and record.Bar is put to cooling platform
On, it cools down 8 hours or more at room temperature.Coil edges and corners are cleared up after cooling and deposit glue, guarantee that bar surface is smooth and clear to lead riser
Manage sanding.
Claims (1)
1. a kind of stator bar lacks glue insulation Novel heating curing method, characterized in that include the following steps；
1), wrap up low resin mica tape: around the stator bar for making hollow copper wire, using numerical control belting machine using low resin mica tape as
Major insulation material surrounds on the outside of copper wire over the ground, and stator bar main structure is made；
2), dipping lacquer: solvent-free immersion paint is by epoxy resin, anhydride curing agent and three component of promotor composition, by weight 100:
90:1 carries out being mixed and made into impregnating varnish；Before dipping, storage paint can is vacuumized, storage paint can vacuum degree is 300Pa~500Pa, is taken out true
Vacuum system is closed after sky, vacuum degree is lower than 300Pa, is again started up vacuum system；Impregnating varnish is preheated to 50 DEG C and stirs evenly；It is fixed
Sub-line stick is preheated to 80 DEG C and is put into tank car, and tank car closes tank door after entering impregnating autoclave and carries out vacuumizing vacuum degree to impregnating autoclave
Impregnating varnish is uniformly inputted dipping lacquer from dipping lacquer pot bottom using storage paint can and impregnating vessel pressure difference, opening conduits valve by 10Pa
In tank car in tank, pipeline valve is closed after impregnating varnish input, by the dry compressed air of air compressor to impregnating vessel
It is kept for 3 hours after being forced into 0.6MPa, after the completion of dipping lacquer process of pressurizeing, air in tank is discharged in atmosphere by circulator；
Bar is placed in tank car under free state in impregnating vessel carries out drop paint processing for 10 minutes, while making pressure inside the tank and atmospheric pressure
Balance, hangs out tank car for bar, is placed on bracket and clears up extra glue impurity；
3) internal heating curing: wrapping stator bar end Anti-Corona Material；Bar and mould contact surface are cleaned out and coat one layer
It puts after silicone grease to molding die, by bar straightway after upper mold, end is close to mold, adjusts active side iron and upper weight position
Set, then first plus-pressure properly protects at stator bar lead and starts to increase temperature, with the temperature rise speed of 1-2 DEG C/min from
Temperature 70 C starts to warm up, and moulding pressure is directly warming up to 145 DEG C of heat-insulation pressure keepings 10 hours for 3MPa is latter when rising to 80 DEG C；
4) bar is cleared up: after stator bar insulation solidification, measuring bar sectional dimension, and record, bar is put to cooling platform
On, it cools down 8 hours or more at room temperature, clears up coil edges and corners after cooling and deposit glue, guarantee that bar surface is smooth and clear to lead riser
Manage sanding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910727961.5A CN110518762A (en) | 2019-08-08 | 2019-08-08 | A kind of stator bar lacks glue insulation Novel heating curing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910727961.5A CN110518762A (en) | 2019-08-08 | 2019-08-08 | A kind of stator bar lacks glue insulation Novel heating curing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110518762A true CN110518762A (en) | 2019-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910727961.5A Pending CN110518762A (en) | 2019-08-08 | 2019-08-08 | A kind of stator bar lacks glue insulation Novel heating curing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110518762A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112706356A (en) * | 2020-12-08 | 2021-04-27 | 山东齐鲁电机制造有限公司 | Generator stator bar mold type single VPI impregnation curing molding process |
| CN117791996A (en) * | 2024-02-23 | 2024-03-29 | 哈尔滨电机厂有限责任公司 | Stator bar SVPI insulation paint dipping system process layout structure and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61214750A (en) * | 1985-03-19 | 1986-09-24 | Fuji Electric Co Ltd | Manufacture of high pressure coil |
| CN101964570A (en) * | 2010-10-29 | 2011-02-02 | 山东齐鲁电机制造有限公司 | Motor stator bar mold type vacuum-pressure impregnated insulation device |
| CN102179341A (en) * | 2011-04-25 | 2011-09-14 | 张家港市佳龙真空浸漆设备制造厂 | Vacuum pressure paint dipping device |
| CN102364840A (en) * | 2011-07-01 | 2012-02-29 | 哈尔滨电机厂有限责任公司 | Method for manufacturing stator bar of air-cooling 200MW steam turbogenerator |
| CN107659091A (en) * | 2017-09-30 | 2018-02-02 | 重庆赛力盟电机有限责任公司 | Coil baking method |
-
2019
- 2019-08-08 CN CN201910727961.5A patent/CN110518762A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61214750A (en) * | 1985-03-19 | 1986-09-24 | Fuji Electric Co Ltd | Manufacture of high pressure coil |
| CN101964570A (en) * | 2010-10-29 | 2011-02-02 | 山东齐鲁电机制造有限公司 | Motor stator bar mold type vacuum-pressure impregnated insulation device |
| CN102179341A (en) * | 2011-04-25 | 2011-09-14 | 张家港市佳龙真空浸漆设备制造厂 | Vacuum pressure paint dipping device |
| CN102364840A (en) * | 2011-07-01 | 2012-02-29 | 哈尔滨电机厂有限责任公司 | Method for manufacturing stator bar of air-cooling 200MW steam turbogenerator |
| CN107659091A (en) * | 2017-09-30 | 2018-02-02 | 重庆赛力盟电机有限责任公司 | Coil baking method |
Non-Patent Citations (1)
| Title |
|---|
| 付强等: "大型电机VPI绝缘体系的关键技术研究", 《电气技术》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112706356A (en) * | 2020-12-08 | 2021-04-27 | 山东齐鲁电机制造有限公司 | Generator stator bar mold type single VPI impregnation curing molding process |
| CN112706356B (en) * | 2020-12-08 | 2023-05-26 | 山东齐鲁电机制造有限公司 | Single-branch VPI impregnation curing molding process of generator stator bar mold type |
| CN117791996A (en) * | 2024-02-23 | 2024-03-29 | 哈尔滨电机厂有限责任公司 | Stator bar SVPI insulation paint dipping system process layout structure and method |
| CN117791996B (en) * | 2024-02-23 | 2024-04-30 | 哈尔滨电机厂有限责任公司 | Process layout structure and method of stator bar SVPI insulating paint dipping system |
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Application publication date: 20191129 |
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