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Design method for prolonging fatigue lives of corrugated pipes of arc extinguish chamber

A design method and bellows technology, applied in design optimization/simulation, calculation, high-voltage air circuit breaker, etc., can solve the problems of difficult to improve the mechanical life of vacuum interrupter, limited life of bellows, low fatigue life of bellows, etc. Achieve the effect of reducing model preparation and resource waste, and improving life expectancy

Inactive Publication Date: 2016-05-04
太原太航科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason why it is difficult to improve the mechanical life of the vacuum interrupter is mainly limited by the life of the bellows. At present, the forming method of the bellows in the domestic interrupter is mainly hydraulic forming. The corrugated surface of the bellows is mainly U-shaped, so forming The wall thickness of the corrugated pipe at the crest and trough is quite different
This is one of the main reasons for the low fatigue life of bellows

Method used

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  • Design method for prolonging fatigue lives of corrugated pipes of arc extinguish chamber
  • Design method for prolonging fatigue lives of corrugated pipes of arc extinguish chamber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Such as figure 1 As shown, according to the method provided to improve the life of the bellows in the arc extinguishing chamber, the bellows with a wave angle of 3° are prepared. The specific operation steps are as follows:

[0016] (1) Design the bellows CAD model with a wave angle of 3°, design the arc radius of the wave crest and wave trough of the bellows to be the same structure, import it into the finite element software Workbench for numerical calculation, and the bellows with a wave angle of 0° Compared with the fatigue life, its life increased by 56.1%, such as figure 2 shown;

[0017] (2) Prepare a forming mold with a wave angle of 3° to prepare a bellows;

[0018] (3) Compared with the fatigue life of the U-shaped bellows, the tested bellows life increased by 47.6%.

Embodiment 2

[0020] Such as figure 1 As shown, according to the method provided to improve the life of the bellows in the arc extinguishing chamber, the bellows with a wave angle of 5° are prepared. The specific operation steps are as follows:

[0021] (1) Design the bellows CAD model with a wave angle of 5°, design the arc radius of the wave crest and wave trough of the bellows to be the same structure, import it into the finite element software Workbench for numerical calculation, and the bellows with a wave angle of 0° Compared with the fatigue life, its life increased by 64%, such as figure 2 shown;

[0022] (2) Prepare a forming mold with a wave angle of 5° to prepare a bellows;

[0023] (3) Compared with the fatigue life of the U-shaped bellows, the life of the tested bellows has increased by 58.9%.

[0024] according to figure 2 The finite element analysis results of the bellows fatigue life with different wave angles given in , it can be seen that with the increase of the des...

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Abstract

The invention provides a design method for prolonging fatigue lives of corrugated pipes of an arc extinguish chamber. The method comprises the specific operations of designing CAD (Computer Aided Design) models of corrugated pipes with different wave angles, designing arc radiuses at crests and troughs of the corrugated pipes to the same structures and importing into finite element software Workbench to carry out numerical calculation; preparing forming dies according to the corrugated pipe structures designed in the software and preparing the corrugated pipes with different wave angles; and testing the service lives of the corrugated pipes. According to the method provided by the invention, through changing the size of each wave angle, the service lives of the corrugated pipes are remarkably improved; and through importing the CAD models of the corrugated pipes into the finite element software Workbench to carry out numerical calculation and analyzing the service lives of the designed corrugated pipes with the different wave angles, the unnecessary die preparation and resource waste can be reduced.

Description

technical field [0001] The invention belongs to the technical field of elastic sensitive element design, and relates to a design method for improving the fatigue life of bellows of an arc extinguishing chamber. Background technique [0002] Vacuum interrupters are the core components of medium and high voltage power switches, mainly used in power transmission and distribution control systems, and also used in power distribution systems such as metallurgy, mining, petroleum, chemical industry, railways, broadcasting, communications, and industrial high-frequency heating. The bellows is the core component of the vacuum interrupter. It is an important accessory for the vacuum interrupter to realize the relative movement of the contacts and has a sealing effect. It is mainly responsible for ensuring the movement of the electrodes within a certain range and maintaining the vacuum for a long time. The arc chamber has a high mechanical life. When the bellows breaks and leaks, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H11/00H01H33/664G06F17/50
CPCG06F30/23H01H11/00H01H33/664
Inventor 杨美玲吉慧琴董小军
Owner 太原太航科技有限公司