第三轨供电系统中受流器与第三轨的接触压力及其对受流性能的影响分析

Analysis of Contact Pressure between Collector and Conductor Rail and Its Influence on Current Collecting Performance in Third Rail Power Supply System

介绍了第三轨受流器的结构原理。分析比较了弹簧式和气压式受流器与第三轨接触压力调节方式的特点。基于电接触基本理论详细的阐述了受流滑板与第三轨接触区的导电机理。接触区域的导电电路由无数微小的电阻及电容并联而成,接触压力通过影响微小电阻、电容的数量比例,进而影响接触面上的导电能力和磨损性能。标称静态接触压力的设计值接近或等于"法向压应力临界值"时,导电能力和磨损特性取得均衡。

The structural principle of the third rail current collector is introduced,the characteristics of pressure regulation modes between spring type,air pressure type current collectors are compared,and the conduct mechanism of the contact area between current collection slide plate and the third rail are elaborated in detail based on the electrical contact basic theory.The conductive circuit in the contact area consists of a myriad tiny resistors and capacitors in parallel,and the contact pressure affects the number ratio of the tiny resistors and capacitors,thereby affecting the conductivity and wear performance of the contact surface.When the design value of the nominal static contact pressure is close to or equal to the"critical value of normal compressive stress,"the conductivity and wear characteristics are balanced.