低气压条件下弓网滑动电接触粗糙表面特性研究  

Research on Sliding Electrical Contact Rough Surface Characteristics of Pantograph-catenary under Low Atmospheric Pressure

作　　者：王图南 寇佳宝 郭凤仪 Wang Tunan;Kou Jiabao;Guo Fengyi(College of Electrical and Electronic Engineering,Wenzhou University,Wenzhou,Zhejiang 325035,China)

机构地区：[1]温州大学电气与电子工程学院,浙江温州325035

出　　处：《机电工程技术》2023年第10期201-206,共6页Mechanical & Electrical Engineering Technology

基　　金：国家自然科学基金资助项目(52077158);浙江省自然科学基金资助项目(LGG22E070001)。

摘　　要：极端环境条件会严重影响高速列车弓网系统的长期稳定运行,但针对高原低气压环境下弓网系统滑动电接触温度特性的相关研究仍不够完善。基于分形W-M函数构造了三维随机粗糙表面,并采用COMSOL Multiphysics仿真软件建立流-固耦合滑动电接触粗糙表面的接触模型。研究了列车运行速度和接触电流对滑动摩擦副粗糙表面稳态温度的影响,进而分析不同气压等级与气体流速对接触面周围流场的分布影响。研究结果表明随着气压等级的提高,滑动摩擦副粗糙表面接触区域的稳态温度逐渐降低。并且随着气压逐渐增大,当接触电流一定时,滑动速度对接触面稳态温度的影响较大;而当滑动速度一定时,接触电流对接触面温度的影响较小。同等气压条件下随着气体流速增大,弓网系统剖面速度场变大,气流拖尾现象更加明显。为研究极端条件对弓网系统的恶劣影响提供数值分析方法,也为高速列车的安全可靠运行提供理论指导。The extreme environment will have an important influence on the pantograph-catenary system of high-speed railway.The temperature characteristics of the sliding electrical contact rough surface of the pantograph-catenary system with high altitude and low atmospheric pressure are still insufficient.The 3D rough surface is established based on the fractal W-M function,and the contact model of fluid-solid coupling sliding electrical contact rough surface is established by using COMSOL Multiphysics simulation software.The influence of sliding speed and contact current on the rough surface steady temperature of sliding friction pair under low atmospheric pressure is researched.The influence of different pressure levels and velocity on the distribution characteristics of the flow field is analyzed.The results show that the steady contact area temperature of sliding friction pair decreases with higher pressure level.With the atmospheric pressure increases gradually,the sliding speed has a great influence on the contact temperature when the contact current is constant.When the sliding speed is constant,the influence of the contact current on the contact temperature is small.When the atmospheric pressure is constant,with the increase of flow velocity,the profile velocity field of the pantograph-catenary system becomes larger,and the airflow trailing phenomenon is more obvious.The research not only provides a numerical analysis method for studying the adverse effects of extreme conditions on the pantograph-catenary system,but also has a theoretical significance for the reliable operation of high-speed railway.

关 键 词：弓网系统 低气压条件 粗糙表面 接触温度 气流场 

分 类 号：TM501.2[电气工程—电器]