Uniform Deceleration Design for Stepped Shock Absorber in Circuit Breaker Spring Operating Mechanism

WAN Kun; XI Yanhui; WANG Xiaopeng

doi:10.7652/xjtuxb202201011

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Uniform Deceleration Design for Stepped Shock Absorber in Circuit Breaker Spring Operating Mechanism

更新时间：2025-05-08

- Uniform Deceleration Design for Stepped Shock Absorber in Circuit Breaker Spring Operating Mechanism
- Vol. 56, Issue 1, Pages: 96-103(2022)
- 作者机构：
  
  西安交通大学机械工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202201011
  CLC： TM561
- Online First：10 January 2022，
  
  Published：2022
- 稿件说明：
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WAN Kun, XI Yanhui, WANG Xiaopeng. Uniform Deceleration Design for Stepped Shock Absorber in Circuit Breaker Spring Operating Mechanism[J]. 2022, 56(1): 96-103.
DOI：

WAN Kun, XI Yanhui, WANG Xiaopeng. Uniform Deceleration Design for Stepped Shock Absorber in Circuit Breaker Spring Operating Mechanism[J]. 2022, 56(1): 96-103. DOI： 10.7652/xjtuxb202201011.

摘要

针对断路器弹簧操动机构中被缓冲对象复杂、难以最小化系统机械冲击的问题

提出一种规划动触头运动求解缓冲器结构参数的方法

对侧切式阶梯型缓冲器的活塞进行设计。以某CT-IV型弹簧操动机构为例

建立缓冲器作用时操动机构的等效动力学模型

设计动触头的等减速运动规律

结合运动学分析

计算缓冲器应当提供的理想缓冲力。为保证实际缓冲力与理想缓冲力接近

根据缓冲器的缓冲动态特性

将缓冲器活塞铣面长度的设计问题转换为最大铣面间距及最小铣面长度的取值问题

根据中间位移的缓冲力与理想缓冲力相等求解每级铣面的间距。采用ADAMS与MATLAB联合仿真搭建的弹簧操动机构虚拟样机模型对设计结果进行验证

结果表明:与在运缓冲器相比

设计缓冲器断路器分闸特性曲线中的缓冲时间增加了0.005 s

缓冲末速度减小了63%

分闸特性曲线更加平缓

且未出现动触头在开断区间内停止的现象

符合实际要求。

Abstract

The buffered objects in spring operating mechanism are intricate and it is difficult to minimize the mechanical impact of the system. A method for planning movement of the moving contact and solving the structural parameters of shock absorber is proposed

and the piston of two-side-cut stepped shock absorber is designed. Taking a CT-IV spring operating mechanism as an example

the equivalent dynamic model of the operating mechanism under the action of the shock absorber is established

and the moving contact is designed to decelerate uniformly. Combining with kinematic analysis

the ideal buffering force that the shock absorber ought to provide is calculated. To ensure that the actual buffering force is close to the ideal

according to the buffer dynamic characteristics of the shock absorber

the design of the piston milling surface length is transformed into the determination of the maximum milling surface spacing and the minimum milling surface length

and the spacing of each milling surface is solved according to the equation of buffering force of the intermediate displacement with the ideal buffering force. The designing results are verified by a virtual prototype of the spring operating mechanism constructed in the form of co-simulation of Adams and MATLAB. Compared with the shock absorber in operation

the buffering time is increased by 0.005 s

the buffered end speed is reduced by 63%

the breaking curve is gentler

and the moving contact does not stop in the breaking interval.

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references

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