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由于运用条件的特殊性,牵引电动机在运行中不可避免地要受到强烈的动力冲击作用,对于目前仍在广泛采用的抱轴悬挂式牵引电动机尤其是如此。据有关资料介绍,当机车运行中轮对通过轨道接缝时,轮对的垂直冲击加速度可以达到重力加速度的15倍到20倍。这时,抱轴悬挂式牵引电动机的各零部件要承受相当于自重几倍到十几倍的冲击力。因此,我们在进行牵引电动机结构设计时,必须充分考虑这种冲击力的影响。
Due to the particularity of the application conditions, the traction motor is inevitably subjected to a strong dynamic impact during operation, especially for the suspension-type traction motors which are still widely used at present. According to the relevant information, when locomotives run through the track seams, the wheelset’s vertical impact acceleration can reach 15 times to 20 times the acceleration of gravity. At this time, the suspension axle traction motor parts to bear the equivalent of several times its own weight to ten times the impact. Therefore, we have to take full account of the impact of this impact force when designing the traction motor structure.