机车多边形磨耗车轮镟修异常原因分析及改进措施

来源期刊:中南大学学报(自然科学版)2019年第9期

论文作者:梁红琴 任德祥 陶功权 LIU Huan(刘欢) 陈国胜 温泽峰

文章页码:2317 - 2327

关键词:机车车轮;车轮多边形磨耗;不落轮镟修

Key words:locomotive wheels; wheel polygonal wear; underfloor wheel turning

摘    要:针对某型号不落轮镟床不能有效消除机车车轮多边形磨耗的问题,建立车轮镟修的几何关系模型,分析采用驱动轮定位镟床不能有效消除车轮多边形的原因。基于SolidWorks Motion模块建立该镟床镟修的仿真模型,仿真不同状态多边形车轮的镟修效果,并研究相应的改进措施。研究结果表明:当车轮与镟床驱动轮接触点之间的弧长约为车轮多边形波长的整数倍时,采用驱动轮定位镟修将产生极强的仿形效果,这是不能有效消除多边形磨耗的根本原因。采用多次进刀镟修无明显改善效果,通过改变驱动轮间距可有效改善车轮多边形的镟修质量。建议将传统不落轮镟床优化设计为驱动轮间距可调节的改进型镟床,或采用轴箱定位镟修。

Abstract: The on-site investigation of a certain type of underfloor wheel lathe indicates that the lathe cannot effectively eliminate the locomotive wheel polygonal wear. Aiming at this issue, the geometry model of wheel turning was established to analyze the reason why the wheel polygon cannot be effectively eliminated. The turning effects of wheels with different polygon states were simulated through a model established by SolidWorks Motion module, and the corresponding improvement measures were studied. The results show that when the arc length between contact points of wheel and driving wheels is about an integer multiple of the wheel polygon wavelength, the driving wheel positioning locomotive wheelset of the lathe will produce a strong imitation effect with wheels turning, which is the reason why the wheel polygon cannot be eliminated effectively. There is no obvious improvement effect with multiple feedings. The turning quality of wheel polygon can be effectively improved by changing the driving wheel distance to a proper one. It is recommended that the traditional underfloor wheel lathe be optimized with adjustable driving wheel distance, or an axle box positioning way be adopted.

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