摘要
介绍车轮磨耗的预测方法。考虑轮轨动态接触状态,采用数值分析方法分析异常磨耗的地铁车轮和新钢轨作用情况,且对导致地铁车轮踏面异常磨耗的原因作了简单分析。分析结果表明,地铁车轮踏面经闸瓦磨耗后在凸起处的接触频率较高,磨耗率大,因而车轮磨耗后踏面凸起不是轮轨接触作用引起的;闸瓦压力过大、压力不均匀、闸瓦晃动量大、频繁制动等因素容易导致滚动圆内侧和踏面外侧的双凹槽磨耗,双凹槽处磨耗速度远远大于轮缘处的磨耗速度;轮缘磨耗主要是轮轨相互作用的结果,而踏面上的凹槽磨耗可能主要由闸瓦制动引起。
The numerical method for wheel wear prediction is introduced,and the analysis on the interaction of the metro wheel with abnormal wear and the new rail is carried out based on the dynamic contact condition of the wheel and rail.The wear occurred on the abnormal wear wheel is predicted with the numerical method.Also the reason for the abnormal wear is briefly discussed.The results show that the wheel tread generates the convexity between the nominal rolling circle and the tread tail after serious wear,and the convexity quite often contacts with the rail,and the wear rate is very high in the region of the convexity.Hence,The convexity formation is not related to the wheel-rail interaction.The double-groove wear on the wheel tread should be attributed to the unstable friction of the brake-shoe and the wheel tread,and the swing of the brake-shoe with respect to the wheel during the friction occurring,and the greatly uneven loading between the shoe and the wheel tread.The rate of the double-groove wear is more serious than that of the wheel flange wear.The wheel flange wear is caused by the flange action of the wheel and rail,whereas the double-groove wear on tread may be mainly caused by the break shoe.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2010年第16期60-66,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金(50675183)
教育部博士点基金(20060613020)
国家重点基础研究发展计划(973计划
2007CB714702)
四川省青年科技基金资助项目
关键词
轮轨滚动接触
地铁车轮
异常磨损
闸瓦
制动
Wheel/rail in rolling contact Metro wheel Abnormal wear Break shoe Brake
