• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (4): 117-123.doi: 10.3901/JME.2018.04.117

• 轮轨接触关系 • 上一篇    下一篇

地铁异常磨耗车轮与辙叉接触分析

张合吉1, 何泽寒2, 刘建桥2, 吴磊3, 王衡禹1, 温泽峰1   

  1. 1. 西南交通大学牵引动力国家重点实验室 成都 610031;
    2. 西南交通大学机械工程学院 成都 610031;
    3. 西南交通大学峨眉校区机械工程系 峨眉 614202
  • 收稿日期:2017-04-30 修回日期:2018-01-12 出版日期:2018-02-20 发布日期:2018-02-20
  • 通讯作者: 温泽峰(通信作者),男,1976年出生,博士,研究员,博士生导师。主要研究方向为轨道交通列车轮轨关系,轨道交通列车减振降噪。E-mail:zfwen@home.swjtu.edu.cn
  • 作者简介:张合吉,男,1988年出生,博士研究生。主要研究方向为轮轨黏着、防滑控制。E-mail:sdzhangheji@126.com
  • 基金资助:
    国家自然科学基金(51605395)和国家重点研发计划(2017YFB1201103-08)资助项目

Analysis of the Contact between Frog and Metro Wheel Tread with Abnormal Wear

ZHANG Heji1, HE Zehan2, LIU Jianqiao2, WU Lei3, WANG Hengyu1, WEN Zefeng1   

  1. 1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031;
    2. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031;
    3. Department of Mechanical Engineering, Southwest Jiaotong University, Emei 614202
  • Received:2017-04-30 Revised:2018-01-12 Online:2018-02-20 Published:2018-02-20

摘要: 针对地铁运营中出现的道岔心轨损伤问题,调查并测量了车轮型面和辙叉区轨头型面,发现运营3.1万km后车轮踏面发生异常磨耗,在踏面尾部出现凸台(或称假轮缘);在翼轨上存在沟槽磨耗。基于实测型面建立了车轮辙叉接触有限元模型,结合迹线法,分析了不同凸台高度的车轮分别与新辙叉、磨耗辙叉之间的接触几何关系和接触应力。对比分析结果表明,具有凸台的车轮异常磨耗对轮轨接触不利,会减小车轮与新辙叉的接触面积,增大轮轨接触应力。在轮对横移时,凸台磨耗会造成车轮与心轨薄弱处接触,易导致心轨损伤。采用镟修异常磨耗车轮或合理的闸瓦与车轮匹配关系,可消除或减缓车轮凸台形异常磨耗,从而避免道岔心轨损伤。

关键词: 道岔, 地铁车轮, 轮轨接触, 异常磨耗, 有限元法

Abstract: To investigate nose rail damage problems arose on crossings in a metro line, wheel and frog profiles are monitored. It is found that abnormal wear at end of the wheel tread (or false flange) occurs at mileage of about 31 000 km. In the meantime, groove wear is found on wing rail. Based on the measured profiles, a finite element model for wheel/frog contact is established. Combined with geometric constraint approach, both contact geometry and contact stress between wheels with different height of the protrusion and new/used frog are analysed. It is found that abnormal worn wheels with false flange are detrimental to wheel/rail contact, which leads to reduced contact area between wheel and new frog and increases the contact stress. When wheelsets move in lateral direction, abnormal worn wheels would contact with the weak part of nose rail and cause damage. Reprofiling abnormal worn wheels with false flange or proper matching relationship between brake shoes and wheel treads can eliminate the wheel abnormal wear and consequently avoid nose rail damage of frog.

Key words: abnormal wear, finite element method, metro wheel, switch and crossing, wheel/rail contact

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