阅读说明：本技术 一种定子线棒少胶绝缘新型加热固化方法 (A kind of stator bar lacks glue insulation Novel heating curing method ) 是由 姜禹 付强 孙永鑫 徐冰 黄程伟 郑伟 冯超 张秋寒 管少博 于 2019-08-08 设计创作，主要内容包括：本发明公开一种定子线棒少胶绝缘新型加热固化方法,本发明能够保证定子线棒少胶绝缘体系技术性能指标不变的前提下,能够明显改善少胶绝缘体系定子线棒防晕及整个端部的整体性,减小定子线棒端部尺寸及误差,并且能够充分利用现有资源提高效益。(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.)

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.

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.