摘要
针对某断路器用T2Y自力型触指在温升试验过程中的触指发热严重、温升超标等现象,对触指用原材料性能开展试验研究,同时结合触指的实际服役工况,对其结构进行仿真优化设计。仿真结果表明:在相同服役条件下,结构优化后的触指最大弹性变形量为由优化前的0.126 mm下降到0.045 mm,优化前后最大等效应力由175.56 MPa下降到72.74 MPa,较优化前分别降低64.7%和58.6%。试验验证结果表明:CuCr1Zr触指10 000次机械寿命试验后抱紧力约为16.35 N,相比T2Y的12.16 N提升约34.46%,有效避免了触指在服役过程中抱紧力不足导致的断口间电场畸变及开断性能下降,同时随断路器顺利通过6 300 A×1.1倍温升试验。
In view of such phenomenon as serious heat and excessive temperature rise of T2Y self-propelled contact finger for a circuit breaker during the temperature-raise test,the performance of raw materials for the contact finger is tested and studied.At the same time,the structure of the T2Y self-propelled contact finger is simulated and optimized in combination with the actual service condition of the contact finer.The simulation results show that under the same service condition the maximum elastic deformation of the contact finger after structure optimization is decreased from 0.126 mm before optimization to 0.045 mm,and the maximum equivalent stress is decreased from 175.56 MPa to 72.74 MPa,which is reduced by 64.7%and 58.6%respectively than that before optimization.The experimental verification results show that the gripping force of CuCr1Zr contact after 10000 mechanical endurance tests is approximately 16.35 N,which is about 34.46%higher than 12.16 N of T2Y.This effectively avoids the distortion of electric field across open contacts and decrease of breaking performance due to insufficient gripping force during the service of the contact.At the same time,it together with the circuit breaker successfully passed the 6300 A×1.1 times temperature rise test.
作者
范艳艳
苗晓军
张彦敏
国秀花
李闪光
许东杰
李凯
郝留成
钟建英
FAN Yanyan;MIAO Xiaojun;ZHANG Yanmin;GUO Xiuhua;LI Shanguang;XU Dongjie;LI Kai;HAO Liucheng;ZHONG Jianying(Pinggao Group Co.,Ltd.,Henan Pingdingshan 467001,China;School of Materials Science and Engineering,Henan University of Science and Technology,Henan Luoyang 471023,China)
出处
《高压电器》
北大核心
2025年第6期68-76,91,共10页
High Voltage Apparatus
基金
河南省科技研发计划联合基金(225200810052)。
关键词
自力型触指
结构优化
应力松弛
抱紧力
温升试验
self-propelled contact finger
structure optimization
stress relaxation
gripping force
temperature rise test
作者简介
范艳艳(1984-),女,硕士,高级工程师,主要研究方向为高压开关器件性能提升技术研究(E-mail:fanyanyan01@163.com);通信作者:张彦敏(1970-),女,博士,教授,主要研究方向为高性能铜合金先进成型及优化技术(E-mail:zhangmin70@163.com)。
