触头系统结构对真空灭弧室温度场影响仿真  

Simulation of the influence of the structure of the contact system on the temperature field of the vacuum interrupter

作　　者：董华军[1] 温超阳 刘林林[1] 郭方准[1] DONG Huajun;WEN Chaoyang;LIU Linlin;GUO Fangzhun(School of Mechanical Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学机械工程学院,辽宁大连116028

出　　处：《电机与控制学报》2023年第8期164-172,共9页Electric Machines and Control

基　　金：国家自然科学基金(51477023);辽宁省自然科学基金(2019-MS-036)。

摘　　要：针对真空灭弧室大电流承载能力提升问题,研究真空灭弧室触头系统的结构设计参数对降低其整体的温升及提高通流能力具有重要意义。随着真空灭弧室向着高电压、大电流发展,其触头结构参数的合理设计决定了真空灭弧室的温度分布情况,因此为研究触头结构对真空灭弧室温度场的影响情况,文章采用有限元法对真空灭弧室的温度场进行磁热双向耦合仿真分析,得到了导电杆直径、触头直径、触头片厚度、杯座厚度以及触头片开槽长度对温度场的影响。结果表明:当导杆直径、触头直径、杯厚分别增大时,最高温度先急剧下降后下降趋势趋于平缓;触头片开槽长度的增加虽会使最高温度升高,但相比其他结构而言,开槽长度对温度场的影响较小;当触头片厚度增大时,最高温度随之下降;真空灭弧室最佳结构参数为:导杆直径55 mm、触头直径65 mm、触头杯厚8 mm、开槽长度20 mm、触头片厚度5 mm,此模型最高温度较优化前降低18.3%。Aiming at increasing the large current carrying capacity of vacuum arc extinguishing chamber,it is of great significance to study the structural design parameters of the contact system of vacuum arc extinguishing chamber for reducing the overall temperature rise and improving the flow capacity.With the development of vacuum arc extinguishing chamber towards high voltage and high current,the reasonable design of its contact structural parameters determines the temperature distribution of vacuum arc extinguishing chamber.In order to study the influence of the contact structure on the temperature field of the vacuum interrupter,the article used the finite element method to conduct a magnetic and thermal bidirectional coupling simulation analysis on the temperature field of the vacuum interrupter.The diameters of the conductive rod and the contact,and the thickness of contact piece were obtained.The results show that when the diameter of the guide rod,the diameter of the contact,and the thickness of the cup increase respectively,the maximum temperature first drops sharply and then the downward trend tends to be gentle.Although the increase in the length of the contact piece will increase the maximum temperature,for other structures,the length of the slot has a small effect on the temperature field.When the thickness of the contact piece increases,the maximum temperature decreases.The optimal structural parameters of the vacuum arc extinguishing chamber include 55 mm guide rod diameter,65 mm contact diameter,8 mm contact cup thickness,20 mm slot length,5 mm contact piece thickness,the maximum temperature of the model is reduced by 18.3%compared with that before optimization.

关 键 词：真空灭弧室 磁热双向耦合 温度场 触头结构 有限元法 电流密度 

分 类 号：TM561[电气工程—电器]