曲线占比权重对重载机车车轮磨耗影响

Influence of curve proportion weight on wheel wear of heavy haul locomotive

针对重载线路曲线段钢轨侧磨和机车车轮磨耗严重的问题,从线路曲线占比权重角度出发,采用UM建立重载机车动力学模型和车轮Archard磨耗模型,研究不同曲线占比权重对车轮磨耗的影响,进一步分析磨耗后车轮型面的动态接触点和静态等效锥度变化,给出重载线路曲线占比权重设置建议.研究结果表明:曲线占比权重增加到30%,会造成1位轮对轮缘和2位轮对踏面磨耗严重,且磨耗速率分别为0.827、0.582 mm/万km;曲线占比权重20%~25%,1、2位左轮对接触点在圆曲线段移动幅度最大,靠近轮缘根部.3位左轮对在曲线占比权重10%~15%时接触点移动幅度最大,接近名义滚动圆位置;建议重载线路曲线占比权重设置10%~15%时,车轮磨耗量增加幅度最小,轮轨匹配关系最佳.

This study focuses on the severe side wear of curve rails and wheel wear of heavy haul loco⁃motives on heavy haul lines.From the perspective of curve proportion weight,the UM software is used to establish a dynamic model of heavy haul locomotives and an Archard wear model for wheel wear.The influence of different curve proportion weights on wheel wear is studied,and the changes in dynamic contact points and static equivalent conicity of wheel profile after wear are further analyzed,giving suggestions for setting the curve proportion weight of heavy load lines.The results show that when the curve proportion weight increases to 30%,significant wear occurs on the tread of the first and second wheelsets,with wear rates of 0.827 mm/10,000 km and 0.582 mm/10,000 km,respec⁃tively.For curve proportion weights between 20%and 25%,the contact point of the first and second left wheelset exhibits the largest movement in the circular curve section,near the root of the flange.The contact point of the third left wheelset moves the most when the curve proportion weight is be⁃tween 10%and 15%,approaching the nominal rolling circle position.It is recommended to set the curve proportion weight of heavy haul lines between 10%and 15%for minimal increase in wheel wear and optimal wheel-rail matching relationship.