车轮踏面磨耗对齿轨列车齿轮齿条接触状态影响研究  

Research on the Influence of Wheel Tread Wear on Pinion and Rack Contact State of Rack-rail Trains

作　　者：雷欢欢 赵家栋 赵玉凯 师陆冰 李志远 岳子毫 Lei Huanhuan;Zhao Jiadong;Zhao Yukai;Shi Lubing;Li Zhiyuan;Yue Zihao(Zhengzhou Research Institute of Mechanical Engineering Co.,Ltd.,Zhengzhou 450001,China)

机构地区：[1]郑州机械研究所有限公司,河南郑州450001

出　　处：《机械传动》2024年第4期131-137,共7页Journal of Mechanical Transmission

基　　金：中国机械科学研究总院集团有限公司技术发展基金资助项目(IFZJJ1082101);中国博士后科学基金项目(021M692951)。

摘　　要：针对齿轨列车车轮踏面磨耗情况下难以探究齿轮齿条接触状态规律的问题,提出了一种基于Hertz接触理论的考虑车轮踏面磨耗情况的齿轮齿条齿面接触应力计算模型。首先,分析了磨耗情况下齿轮齿条的接触关系,获得了接触应力计算关键参数随车轮磨耗的变化规律,并结合Hertz接触理论构建了考虑车轮磨耗的齿轮齿条接触应力计算模型;然后,选取某工程齿轮齿条参数进行计算,获得了磨耗周期内的齿面接触应力分布,并通过27组有限元仿真试验获得了不同磨耗量、不同接触位置的齿轮齿条接触应力数据,与上述计算模型结果进行了对比;最后,运用上述计算模型进一步分析了车轮磨耗影响接触应力规律的内在机制和关键因素。结果表明,模型结果与仿真计算结果的最大相对误差为7.71%,验证了计算模型的准确性;车轮踏面磨耗量越大,齿轮齿条啮入点附近的接触应力越大,其影响机制是车轮磨耗导致啮入点附近驱动齿轮曲率半径急剧减小;增大初始中心距和齿条齿顶圆角影响系数,可降低车轮踏面磨耗对接触应力的影响,并可通过减小高度调整周期来优化接触状态情况。Aiming at the problem that it is difficult to explore the contact state law of racks and pinions un-der the condition of rack-rail train wheel tread wear,a calculation model of rack and pinion tooth surface con-tact stress considering wheel tread wear is proposed based on the Hertz contact theory.Firstly,the contact rela-tionship of racks and pinions under wheel tread wear is analyzed,the change law of key parameters of contact stress calculation with wheel wear is obtained,and the contact stress calculation model of racks and pinions con-sidering wheel wear is constructed in combination with the Hertz contact theory.Then,the rack and pinion pa-rameters of an engineering are selected for calculation,the tooth surface contact stress distribution in the wear cycle is obtained,and the contact stress data of the pinions and racks and of different wear quantities and differ-ent contact positions are obtained through 27 sets of finite element simulation tests,which are compared with the above calculation model results.Finally,the above calculation model is used to further analyze the internal mechanism and key factors of wheel wear affecting the contact stress law.The results show that the maximum rel-ative error between the model results and the simulation calculation results is 7.71%,which verifies the accura-cy of the calculation model.The greater the wear of the wheel tread is,the greater the contact stress near the meshing entry point of the rack and pinion will be;and the influence mechanism is that the radius of curvature of the drive gear near the meshing entry point is sharply reduced by wheel wear.Increasing the initial center dis-tance and the rack tooth top fillet influence coefficient can reduce the influence of the wheel tread wear.The height adjustment period can also be appropriately reduced to optimize the contact state situation.

关 键 词：齿轨列车 车轮踏面磨耗 齿轮齿条 HERTZ接触 齿面接触应力 理论计算 

分 类 号：U270.33[机械工程—车辆工程]