动车组车轮多边形机理分析

介绍了高速动车组车轮多边形的形成机理以及与转向架结构之间的关系。转向架一系悬挂和定位结构不同,在动车组运行过程中对转向架固定轴距的影响也不同。当采用转臂定位结构时,由于一系钢弹簧的沉浮运动,使车轮在钢轨方向产生有规律的微小滑动,造成车轮多边形磨耗。

Analysis of EMU Wheel Polygonization Mechanism

The relationship between the wheel polygoniza-tion formation mechanism and the structure of high-speed EMU bogie is introduced.Different primary suspensions and positioning structures of the bogie will cast different in-fluences on the fixed wheelbase of bogie during the opera-tion of EMU.When the tumbler axle-box positioning structure is adopted,the wheel set will produce tiny slide in the direction oftherailbecauseoftheupanddownmotionsoftheprimary spring,thus resulting in the regular polygonization of wheel.