摘要
受电弓作为动车组高压供电系统中的关键部件,其布置方式将影响弓网关系协调、受流稳定和减阻降噪等性能,动车组高速运行时,受电弓与支持绝缘子的连接强度将承受到严峻的考验。文章对动车组受电弓的布置准则进行了分析和总结,包括受电弓的间距、定位、开闭口和高度,为动车组受电弓的集成方案设计提供了有效参考。通过分析受电弓在动车组高速运行中各工况下的受力情况,计算了受电弓与支持绝缘子连接螺栓的极限载荷和最小预紧力,然后结合最小预紧力和工作拉力进一步校核了螺栓强度,证明了所用螺栓规格符合使用要求。根据连接螺栓的工作拉力和许用应力,计算了连接螺栓的最大预紧力,并确定了合理的拧紧扭矩,为受电弓与支持绝缘子连接螺栓的选型和扭矩取值提供了正确指导。
Pantograph is a key component of the high-voltage power supply system of EMU,and its layout mode will influence performances such as coordination of the pantograph-catenary relationship,current collection stability and resistance,and noise reduction.When EMU runs at high speed,the connection strength between the pantograph and the supporting insulator will withstand a severe test.This article analyzes and summarizes the layout criteria of pantographs for EMU,including the spacing,positioning,opening/closing,and height of the pantograph,providing an effective reference for the integrated design of pantographs for EMU.By analyzing the force situation of the pantograph under various working conditions during high-speed operation of the EMU,it calculates the limit load and the minimum pre-tightening force of the bolts connecting the pantograph and the supporting insulator.Then,it further verifies the bolt strength by combining the minimum pre-tightening force and the working tension,proving that the bolt specifications used meet the requirements for use.Based on the working tension and the allowable stress of the connecting bolts,it calculates the maximum pre-tightening force of the bolts and determines a reasonable tightening torque.This article provides correct guidance for the selection of model and the determination of the torque value of the bolts connecting the pantograph and the supporting insulator.
作者
赵刚
贾亚丽
ZHAO Gang;JIA Yali(CRRC Qingdao Sifang Locomotive&Rolling Stock Co.,Ltd.,Qingdao 266111,China)
出处
《智慧轨道交通》
2024年第5期6-9,共4页
INTELLIGENT RAIL TRANSIT
关键词
动车组
受电弓
布置准则
强度校核
预紧力
扭矩
EMU
pantograph
layout criteria
strength verification
pre-tightening force
torque
