电气化铁路曲线区段接触线偏磨研究

Study on Eccentric Abrasion of Contact wires on Curve Section of Electrified Railway

曲线区段外轨超高会导致机车与受电弓倾斜,引发接触线偏磨。本文结合某普速铁路情况分析计算了不同外轨超高条件下的接触线偏磨量。计算表明:在弓网动态运行平稳时,曲线区段接触线偏磨不会引发弓网故障,若曲线区段定位器坡度角为0°甚至为负数,接触线偏磨深度极值将迅速降低造成撞击隐患;接触网施工误差、随机风荷载、列车振动均会影响弓网动态运行平稳性。为确保弓网安全运行,研究了接触线偏磨的相关影响因素,分析了定位点前后第一吊弦位置、拉出值大小、跨距大小对缓解接触线偏磨的影响,为高速铁路接触线偏磨问题分析提供借鉴参考。

The inclination of locomotive and pantograph caused by the superelevation of outer rail at curve section will lead to the eccentric abrasion of contact wires.The paper,in connection to situations of a common speed railway,analyzes and calculates the amount of eccentric abrasion of contact wires under different conditions of superelevation.The calculation results show:the eccentric abrasion of contact wire at curve section will not lead to the pantograph-catenary faults under stable operation of pantograph-catenary,the limit value of depth of eccentric abrasion of contact wire will be lowered quickly and may lead to the hidden risks of impact if the angle of gradient of the steady arm at curve section is equal to zero or less than zero;the OCS construction error,random wind load and locomotive vibration will influence the stability of pantograph-catenary operation.To guarantee the safe operation of pantograph-catenary,eccentric abrasion of contact wire related factors is studied,influence to the eccentric abrasion of contact wire caused by the first dropper before and after the registration point,stagger values and length of spans are analyzed,these will be able to provide reference for analyzing the eccentric abrasion of contact wires for high-speed railway.