大变温工况下电接触件的力学特性与接触性能分析  

Analysis of Mechanics Characteristics and Contact Performance for Electrical Contacts under Great Temperature Variation Conditions

作　　者：肖仕红[1] 张靖柯 张辉耀 周士超 何先友 岳琳琳 XIAO Shihong;ZHANG Jingke;ZHANG Huiyao;ZHOU Shichao;HE Xianyou;YUE Linlin(School of Mechatronic Engineering,Southwest Petroleum University,Chengdu,610500;School of Information,Southwest Petroleum University,Nanchong,Sichuan,637001)

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]西南石油大学信息学院,南充637001

出　　处：《中国机械工程》2021年第19期2383-2389,共7页China Mechanical Engineering

基　　金：国家重点研发计划(2016YFC0802102-03);四川省教育厅项目(省679)。

摘　　要：为提高电钻杆用冠簧式接触件在大变温钻井工况下的电接触性能,对接触件展开了力学特性和电接触性能研究。基于静力学和热力耦合有限元分析方法,通过分析簧片挠度与接触压力、插入力与插针插入深度的关系,研究了大变温工况下不同装配间隙接触件的插入力、接触压力、接触面积变化规律。研究结果表明:接触压力随挠度增大而增大,增幅逐渐减小,插入力随插入深度先增大后减小最后趋于稳定;温升导致接触件接触压力、接触面积减小,降低了电接触性能,当装配间隙为0.07 mm≤δ≤0.2 mm时对电接触性能的影响程度较小;综合考虑150℃下的接触压力、接触面积和最大等效塑性应变,冠簧式接触件最优装配间隙为0.07 mm。该研究结果可为电钻杆用冠簧式接触件的结构设计及优化提供参考。In order to improve the electrical contact performances of crown spring contacts for electric drill pipes under great temperature variation drilling conditions,the mechanics properties and electrical contact performances of the contacts were studied.Based on the static and thermo-mechanics coupling finite element analysis method,the relationships between the deflection of the reed and the contact pressure,the insertion force and the insertion depth of the pin were analyzed.The variation laws of insertion forces,contact pressures and contact areas for contact parts with different assembly gaps were studied under great temperature variation conditions.The results show that the contact pressure increases with the increase of deflection,and the increases decrease accordingly,and the insertion forces first increase and then decrease with the insertion depths and finally stabilize.The temperature rise causes the contact pressures and contact areas of the contacts to decrease,which reduces the electrical contact performance.When the assembly gap is as 0.07 mm≤δ≤0.2 mm,the impacts on the electrical contact performance are small.Considering the contact pressure,contact area and maximum equivalent plastic strain at 150℃,the optimal assembly gap of crown spring contact is as 0.07 mm.The research results may provide references for the structural design and optimization of crown spring contacts for electric drill pipes.

关 键 词：大变温 电钻杆 冠簧式接触件 装配间隙 力学特性 接触性能 

分 类 号：TM503.5[电气工程—电器]