Insulation structure of dry-type transformer combined pad body

Abstract

The invention relates to a dry-type transformer body insulation structure adopting combined cushion blocks. The dry-type transformer body insulation structure comprises an iron core, an upper clamping piece, a lower clamping piece, a high-voltage winding and a low-voltage winding, wherein an insulation cylinder is arranged between the high-voltage winding and the low-voltage winding; and the combined cushion blocks used for axial positioning are arranged between the upper end of each of the high-voltage winding and the low-voltage winding and the upper clamping piece as well as between the lower end of each of the high-voltage winding and the low-voltage winding and the lower clamping piece, each combined cushion block comprises a base cushion block and two rubber plates pressed on end surfaces of a high-voltage coil and a low-voltage coil respectively, and an intermediate cushion block is clamped between the base cushion block and each rubber plate. The dry-type transformer body insulation structure adopting the combined cushion blocks has the advantages of good combination properties including higher compression resistance, shock resistance and tensile strength, high heat resistance, good chemical resistance, low and stable partial discharge, certain flame retardance, easiness in processing and the like; and further, the electric safety of the transformer is improved, and the manufacture cost of the insulation structure is reduced greatly.

Description

technical field [0001] The invention relates to a body insulation structure of a dry-type transformer combined cushion block, which belongs to the field of transformer manufacturing. Background technique [0002] Body insulation is an important part of the product structure of dry-type transformers. For a long time, most domestic dry-type transformer manufacturers have used the traditional body insulation structure, which is composed of resin-cast insulation pads, rubber plates, insulation cylinders, and nail pressing devices. Among them, the insulating block mainly adopts DMC, SMC or APG block mainly casted by resin material. This type of block is molded by one-time casting of a fixed mold, high temperature resistance, acid and alkali resistance, good strength, but poor variability, unstable partial discharge, and relatively high cost. With the increasingly fierce competition in the dry-type transformer product market and the update and development of product technology, ...

AI Technical Summary

Problems solved by technology

This type of block is formed by one-time casting of a fixed mold, high temperature resistance, acid and alkali resistance, good strength, but poor variability, unstable partial discharge, and relatively high cost

With the increasingly fierce competition in the dry-type transformer product market and the update and development of product technology, the traditional body insulation structure is increasingly unable to meet the design requirements of products with different structures.

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