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Transformer insulating paper with low expansion coefficient

A low expansion coefficient, transformer technology, applied in the field of transformers, to achieve the effects of enhanced heat resistance, simple preparation method, and wide source of raw materials

Inactive Publication Date: 2016-02-17
TONGLING SANJIA TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using mica to modify insulating paper can obtain insulating paper with better performance, but there are few researches on this aspect at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] An insulating paper for transformers with a low expansion coefficient, prepared from the following raw materials in parts by weight (kg): silane coupling agent kh5500.6, mica 6, glycine 1, silane coupling agent kh5700.3, emulsifier OP, Sodium dodecylsulfonate 0.2, E44 epoxy resin 2, polyacrylamide 0.5, pulp board 500, utolopine 1, zirconium silicate 0.4, calcium fluoride 1, shell powder 1.8, cordierite powder 2.3, go Appropriate amount of ionized water.

[0014] The insulating paper for a transformer with a low expansion coefficient is prepared by the following specific steps:

[0015] (1) Add the silane coupling agent kh550 into the solution with a mass ratio of ethanol to water of 1:1, heat it in a water bath to 35°C, add dropwise oxalic acid to adjust the pH value to 4, hydrolyze for 1 hour, and dip the mica sheet into Stir and soak in 75% ethanol for 1 h, then ultrasonically wash for 10 min, soak in deionized water for 0.5 h, and finally place in an oven to dry at ...

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PUM

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Abstract

The invention discloses a transformer insulating paper with a low expansion coefficient. The transformer insulating paper with the low expansion coefficient is prepared by using the following raw materials in parts by weight: 0.6 to 0.7 part of silane coupling agent kh550, 6 to 8 parts of mica, 1 to 1.5 parts of glycine, 0.3 to 0.4 part of silane coupling agent kh570, 0.1 to 0.2 part of emulsifying agent OP-10, 0.2 to 0.3 part of sodium dodecyl sulfate, 2 to 3 parts of E44 epoxy resin, 0.5 to 0.6 part of polyacrylamide, 500 to 550 parts of pulp board, 1 to 2 parts of Urotropin, 0.4 to 0.6 part of zirconium silicate, 1 to 1.5 parts of calcium fluoride, 1.8 to 2.2 parts of shell powder, 2.3 to 2.6 parts of cordierite powder and a proper amount of deionized water. The preparation method of the transformer insulating paper with the low expansion coefficient is simple, the source of raw materials is wide, the cost is low, the expansion coefficient of the prepared insulating paper is low, the heat resistance is good, the insulation performance is good, the service life of the insulating paper used in the transformer is long and the insulating paper is worthy of being popularized.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to insulating paper for transformers with a low expansion coefficient. Background technique [0002] In recent years, with the rapid development of my country's electric power, electrical, electronics, home appliances and communications industries, people have higher and higher requirements for transformers. Cellulose insulating paper is one of the most widely used internal insulating materials in oil-immersed power transformers. Since it cannot be replaced during operation, its mechanical and insulating properties directly determine the service life of the transformer. In the actual transformer, the insulating paper is subjected to high-intensity electric field stress for a long time, and once a breakdown occurs, the transformer will fail. If the electrical performance of insulating paper can be improved, the usage of insulating paper can be saved, the working life of insulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/24H01B17/60
Inventor 李新满
Owner TONGLING SANJIA TRANSFORMER
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