Insulating paint for enameled wire and application method of insulating paint

A technology of insulating varnish and enameled wire, which is applied in the direction of conductor/cable insulation, device for coating liquid on the surface, cable/conductor manufacturing, etc. It can solve the problems of enameled wire adhesion and voltage performance that cannot be improved, and poor configuration ratio. Achieve the effect of good adhesion, stable breakdown voltage and high bonding strength

Active Publication Date: 2014-09-10
济南宝世达实业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in order to improve the adhesion and voltage performance of the enameled wire, various domestic manufacturers began to use the original varnish of insulating varnish to configure the insulating varnish by adding other ingredients. However, due to poor control of the configuration ratio, the adhesion and voltage performance of the enameled wire still cannot be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0023] First of all, the choice of the type of insulating paint. The selected insulating varnish is 225 polyesterimide insulating varnish (produced by ELANTAS Beck India Ltd, model TEREBEC SL 225-40) and 1766 polyamideimide insulating varnish (produced by Avit Electric Insulation Materials (Changzhou) Co., Ltd., model 1766 ), and the temperature resistance is 200°C. It not only ensures that the product has a higher bonding strength but also ensures a higher temperature resistance index of the product.

[0024] Then, configure the viscosity of the insulating varnish. The viscosity of the purchased insulating varnish is tested by a Tu-4 viscometer, and the viscosity is around 130s-150s. Respectively with the matching 150 solvent (Avette Electrical Insulation Materials (Changzhou) Co., Ltd.) and 116 solvents (Alentas Electrical Insulation Materials (Tongling) Co., Ltd.) for reconciliation and use. Prepare insulating varnishes with different viscosities according to production ...

Embodiment 2

[0030] First of all, the choice of the type of insulating paint. The selected insulating varnish is 225 polyesterimide insulating varnish (produced by ELANTAS Beck India Ltd, model TEREBEC SL 225-40) and 1766 polyamideimide insulating varnish (produced by Avit Electric Insulation Materials (Changzhou) Co., Ltd., model 1766 ), and the temperature resistance is 200°C. It not only ensures that the product has a higher bonding strength but also ensures a higher temperature resistance index of the product.

[0031] Then, configure the viscosity of the insulating varnish. The viscosity of the purchased insulating varnish is tested by a Tu-4 viscometer, and the viscosity is around 130s-150s. Respectively with the matching 150 solvent (Avette Electrical Insulation Materials (Changzhou) Co., Ltd.) and 116 solvents (Alentas Electrical Insulation Materials (Tongling) Co., Ltd.) for reconciliation and use. Prepare insulating varnishes with different viscosities according to production ...

Embodiment 3

[0037] First of all, the choice of the type of insulating paint. The selected insulating varnish is 225 polyesterimide insulating varnish (produced by ELANTAS Beck India Ltd, model TEREBEC SL 225-40) and 1766 polyamideimide insulating varnish (produced by Avit Electric Insulation Materials (Changzhou) Co., Ltd., model 1766 ), and the temperature resistance is 200°C. It not only ensures that the product has a higher bonding strength but also ensures a higher temperature resistance index of the product.

[0038] Then, configure the viscosity of the insulating varnish. The viscosity of the purchased insulating varnish is tested by a Tu-4 viscometer, and the viscosity is around 130s-150s. Respectively with the matching 150 solvent (Avette Electrical Insulation Materials (Changzhou) Co., Ltd.) and 116 solvents (Alentas Electrical Insulation Materials (Tongling) Co., Ltd.) for reconciliation and use. Prepare insulating varnishes with different viscosities according to production ...

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Abstract

The invention discloses an insulating paint for an enameled wire and an application method of the insulating paint. The insulating paint disclosed by the invention is 225 polyesterimide insulating paint and 1766 polyesterimide insulating paint of which the temperatures are both 200 DEG C. By virtue of the insulating paint, the relatively high adhesive strength as well as relatively high temperature resistant index of the product are ensured. By mixing the insulating paint with a matched solvent, a suitable viscosity is reached; after the enameled wire is coated with the insulating paint, the experiment shows that the enameled wire has good adherence; after the enameled wire is elongated by 20% (with respect to the national standard, by 15%), the thickness of the insulating layer losing the adherence is not more than 1b. The breakdown voltage of the enameled wire is stable and can be stabilized at 4000-5500V.

Description

technical field [0001] The invention relates to the technical field of enameled wire production, in particular to an insulating varnish for enameled wires and a use method thereof. Background technique [0002] The principle of steam turbine generating current is that the rotor rotates to generate a magnetic field, and the stator bar cuts the magnetic field lines to generate current. The internal stator bar of the generator set is a key part of the motor, and at present, the stator bars of large and medium-sized steam turbines at home and abroad are mostly made of enamelled sintering wire. The most important performance of the enamelled sintering wire in the acceptance process is whether the electrical performance of the insulation layer of the product can meet the requirements. Due to the design requirements of the motor itself, this product mainly needs to rely on the paint film of about 10 wires of enameled wire for insulation protection. Due to the unstable voltage per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D5/25B05D7/20B05D7/24B05D3/10B05D1/36
Inventor 尚兴军刘焕永孙福学王雪东董林于占勇
Owner 济南宝世达实业发展有限公司
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