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Development method of epoxy resin impregnated glass fiber direct-current sleeve

A glass fiber and epoxy resin technology, applied in insulators, electrical components, insulators, etc., can solve the problem of affecting the initial curing process of the casing core, affecting the space charge accumulation effect on the interface of the casing medium, and affecting the field strength distribution of the casing. and other problems, to achieve the effect of reducing the difficulty of the winding process, rational distribution, and ensuring reliable operation.

Inactive Publication Date: 2020-11-27
WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical difficulties of adopting this kind of process are: (1) the winding temperature of epoxy resin impregnated glass fiber will affect the preliminary curing process of bushing core; (2) (converter transformer) DC bushing core capacitive screen length and thickness The design will affect the field strength distribution of the bushing; (3) (converter transformer) the design of the connection between the end screen of the DC bushing core or the voltage screen and the outside of the bushing will affect the space charge accumulation effect existing at the interface of the bushing medium

Method used

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  • Development method of epoxy resin impregnated glass fiber direct-current sleeve
  • Development method of epoxy resin impregnated glass fiber direct-current sleeve
  • Development method of epoxy resin impregnated glass fiber direct-current sleeve

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A method for developing an epoxy resin impregnated glass fiber DC bushing, comprising the following steps:

[0028] S1. Core winding, according to the length parameters of each layer of capacitive screen (resistive screen) designed according to the insulation requirements, the parameters of every two layers of capacitor thickness are equal to 2.5mm, and the winding machine program is set according to the casing design parameters, and the winding temperature is 90°C , during the winding process of the casing core, it is also gradually solidified;

[0029] S2. The core body is cured. After the core body is wound, it is sent to the oven, and a reasonable oven temperature and duration are set to ensure that the core body is completely cured;

[0030] S3. The cured core is machined according to the design drawings of the core. The feed rate for rough machining is 0.1 mm, and the feed rate for finishing is 0.02 mm to complete the mechanical processing of the core body;

[00...

Embodiment 2

[0035] A method for developing an epoxy resin impregnated glass fiber DC bushing, comprising the following steps:

[0036] S1. Core winding. According to the length parameters of each layer of capacitive screen (resistive screen) designed according to the insulation requirements, the parameter of 3mm is taken as the thickness of every two layers of capacitance is equal. Set the winding machine program according to the design parameters of the casing. During the winding process of the casing core, it is also gradually solidified;

[0037] S2. The core body is cured. After the core body is wound, it is sent to the oven, and a reasonable oven temperature and duration are set to ensure that the core body is completely cured;

[0038] S3. The cured core is machined according to the core design drawing. The rough machining feed is 0.2mm, and the finishing feed is 0.04mm to complete the core machining;

[0039] S4. Glue the core body and the flange, grind and clean the inner wall of...

Embodiment 3

[0043] A method for developing an epoxy resin impregnated glass fiber DC bushing, comprising the following steps:

[0044] S1. Core winding, the length parameters of each layer of capacitive screen (resistive screen) designed according to insulation requirements, the parameters of 3.5mm for every two layers of capacitor thickness are equal, and the winding machine program is set according to the casing design parameters, and the winding temperature is 100°C , during the winding process of the casing core, it is also gradually solidified;

[0045] S2. The core body is cured. After the core body is wound, it is sent to the oven, and a reasonable oven temperature and duration are set to ensure that the core body is completely cured;

[0046] S3. The cured core is machined according to the core design drawing. The rough machining feed is 0.3 mm, and the finishing feed is 0.06 mm to complete the core machining;

[0047] S4. Glue the core body and the flange, grind and clean the in...

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Abstract

The invention discloses a development method of an epoxy resin impregnated glass fiber direct-current sleeve. The development method comprises the following steps: S1, winding a core body, namely designing length parameters and selection parameters of each layer of capacitive screen according to insulation requirements, setting a winding machine program according to sleeve design parameters, and gradually and preliminarily curing in the winding process of the sleeve core body. The epoxy resin impregnated glass fibers are wound at the high temperature of 90-120 DEG C, so that the primary curingprocess of the core body is promoted; the length of each layer of the capacitive screen wound by a semi-conductive band is designed according to the insulation requirement, the thickness of each layer is designed to be 2.5 mm-5 mm, reasonable distribution of sleeve field intensity is achieved, and the difficulty of the sleeve core winding process is reduced through the equal-thickness design method; and a collector ring connected with an end screen or a voltage screen is arranged at the position, close to the flange, in the sleeve, accumulated charges or space accumulated charges generated inthe operation process are released through grounding, and reliable operation of the product is guaranteed. The sleeve is suitable for a direct current system.

Description

technical field [0001] The invention relates to the technical field of DC bushings, in particular to a method for developing an epoxy resin-impregnated glass fiber DC bushing. Background technique [0002] As a current-carrying conductor, the DC bushing passes through the box or wall with different potentials, and plays the role of insulation and mechanical support. It is one of the key equipment to ensure the safe and stable operation of the system. Traditional (converter transformer) DC bushings mostly use oil-impregnated paper and glue-impregnated paper production processes, but there is a risk of oil leakage in oil-impregnated paper bushings, and rubber-impregnated paper bushings are easy to absorb moisture, and many bushings occur during system operation. failures and accidents. Compared with these two types of bushings, the (converter transformer) DC bushings produced by the epoxy resin impregnated glass fiber process are pure solid structures, oil-free, non-decompose...

Claims

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Application Information

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IPC IPC(8): H01B19/00H01B17/58H01B17/64H01B17/42
CPCH01B19/00H01B17/583H01B17/64H01B17/42H01B17/28
Inventor 邓建钢徐卓林兰贞波宋友柯磊聂宇唐程王珊珊彭亚凯毛月飞蔡超石悠旖
Owner WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST
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