HXD2型机车车轮踏面斜裂纹产生机制及旋修对策研究  

Mechanism Research on Inclined Cracks on Wheel Tread of HXD2 Locomotive and the Countermeasures for Profiling Repair

作　　者：石珮廷 杨延峰 杨兴宽 吴军 孙亚星 孙宇铎 李立 赵飒 SHI Peiting;YANG Yanfeng;YANG Xingkuan;WU Jun;SUN Yaxing;SUN Yuduo;LI Li;ZHAO Sa(Metals&Chemistry Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Ankang Locomotive Depot,China Railway Xi'an Group Co.,Ltd.,Ankang 725005 Shaanxi,China)

机构地区：[1]中国铁道科学研究院集团有限公司金属及化学研究所,北京100081 [2]中国铁路西安局集团有限公司安康机务段,陕西安康725005

出　　处：《铁道机车车辆》2024年第2期130-137,共8页Railway Locomotive & Car

基　　金：中国铁路总公司科技研究开发计划(2016J009-B);中国铁道科学研究院集团有限公司科研项目(2020YJ071)。

摘　　要：机车车轮服役工况恶劣,失效问题突出,针对HXD2型机车车轮频发的踏面斜裂纹问题,文中分析调研车轮运维现状,利用金相检查探究斜裂纹萌生及扩展机制,通过现场测试跟踪,归纳斜裂纹分布规律及特征,基于机车车轮故障预测与健康管理系统(以下简称“机车PHM+车轮系统”)提出经济性旋修方案,并进行试验效果验证。研究结果表明,踏面斜裂纹是制约车轮服役寿命的主要原因,该裂纹属于滚动接触疲劳伤损,开口方向指向轮缘,在1、4轴位处最易产生,并且随着轮径的减少,裂纹扩展深度也总体增加;经济性旋修方案能合理推荐轮缘厚度,降低轮径旋修损失,每片车轮单次旋修节省2.3 mm,取得了一定的效果。Locomotive wheels have bad service conditions and prominent failure problems.In view of the frequent occurrence of oblique cracks on the tread of HXD2 locomotive wheels,this paper analyzes and investigates the current status of wheel operation and maintenance,and uses metallographic inspection to explore the initiation and propagation mechanism of inclined cracks.Based on the distribution law and characteristics of inclined cracks,an economical repair plan is proposed based on the locomotive wheel fault prediction and health management system(hereinafter referred to as"locomotive PHM+wheel system"),and the experimental results are verified.The research results show that the inclined tread crack is the main reason that restricts the service life of the wheel.The crack belongs to the rolling contact fatigue damage.The opening direction points to the wheel rim.It is most likely to occur at the 1st and 4th axis positions.The depth of crack propagation also increased in general;the economical repair plan can reasonably recommend the thickness of the wheel flange,reduce the loss of wheel diameter repair,and save 2.3 mm per wheel in a single repair,which has achieved certain results.

关 键 词：HXD2型机车 踏面斜裂纹 机车车轮故障预测与健康管理系统 经济性旋修 

分 类 号：U260.331.1[机械工程—车辆工程]