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Vacuum pressure impregnating insulating method

A technology of vacuum pressure impregnation and insulation treatment, which is applied in the direction of laying solid insulation, manufacturing motor generators, electrical components, etc. It can solve the problems of large partial discharge of windings, poor insulation permeability, and temperature rise of motors, so as to improve production efficiency. Improvement of dielectric properties and reduction of production cost

Inactive Publication Date: 2012-06-13
CHONGQING ELECTRIC MACHINE FEDERATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, in the process of insulating the stator core with windings of high-voltage motors, it is necessary to pre-bake the stator core with windings at 90°C for 3 hours, and then perform vacuum pressure impregnation, so the production efficiency is low
On the other hand, the existing treatment process, the insulation permeability is poor, the partial discharge of the winding is large, and the temperature of the motor rises

Method used

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  • Vacuum pressure impregnating insulating method

Examples

Experimental program
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Embodiment 1

[0023] Embodiment 1: a vacuum pressure impregnation insulation treatment method, comprising the following steps:

[0024] (1) Vacuuming: Put the workpiece into the varnish immersion tank, evacuate the varnish immersion tank to a pressure of 60Pa inside the tank, and keep the vacuum for 3 hours;

[0025] (2) Paint delivery: according to 0.6m 3 Input the epoxy anhydride vacuum pressure impregnation resin from the paint storage tank to the paint dipping tank at a flow rate of / min for 30 minutes to submerge the workpiece;

[0026] (3) Pressure impregnation: adjust the pressure in the impregnation tank to 0.6Mpa, and keep it under this pressure for 3 hours;

[0027] (4) One-time paint back: adjust the pressure of the dipping tank to 0.3Mpa, and use the pressure difference between the dipping tank and the paint storage tank to make the epoxy anhydride vacuum pressure impregnation resin flow back into the paint storage tank;

[0028] (5) Drip paint: maintain normal pressure in the...

Embodiment 2～6

[0040] Embodiment 2~6: embodiment 2~7 process step is identical with embodiment 1, and process parameter is as shown in the following table:

[0041]

[0042]

[0043] The process parameter not mentioned in the embodiment 2~7 shown in table 1, is identical with embodiment 1.

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Abstract

The invention discloses a vacuum pressure impregnating insulating method. the vacuum pressure impregnating insulating method comprises the following steps of: (1) vacuumizing; (2) conveying paint; (3) pressurizing and paint impregnating; (4) repeating to paint for the first time; (5) dripping paint; (6) repeating to paint for the second time; (7) discharging a workpiece from a jar; and (8) baking. After the workpiece is processed by the method provided by the invention, the content of a low molecular volatile matter in resin is lower than 2 percent, so that an environment-friendly requirement is further met, the thickness of an insulating layer is reduced by 10 percent and the dielectrical property is improved by 10 percent; and a conventional pre-baking process is saved, the production efficiency is improved, and the production cost is reduced to 3 percent of the production value of a product.

Description

technical field [0001] The invention relates to an insulation treatment method, in particular to an insulation treatment method using vacuum pressure impregnation. Background technique [0002] In the manufacturing process of the motor, it is necessary to insulate the winding stator core of the motor. In the prior art, in the process of insulating the stator core with windings of high-voltage motors, it is necessary to pre-bake the stator core with windings at 90°C for 3 hours, and then perform vacuum pressure impregnation, so the production efficiency is low . On the other hand, with the existing processing technology, the insulation permeability is poor, the partial discharge of the winding is large, and the temperature of the motor rises. [0003] Therefore, those skilled in the art are committed to developing a vacuum pressure impregnation insulation treatment method with high production efficiency and good treatment effect. Contents of the invention [0004] In vie...

Claims

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Application Information

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IPC IPC(8): H02K15/10H02K15/12
Inventor 苏建新周健曹庆
Owner CHONGQING ELECTRIC MACHINE FEDERATION