轮对是车辆上最重要的部件之一。轮对的结构比较稳定,不象别的一些零部件常有重大的改革。这是完全可以理解的,因为轮对工作必须对运行安全性有充分的保证,而且数量众多,稍一变动都会影响到大量的人力、物力,故对待轮对的任何变革,必须取非常审慎的态度。当然,这并不是说轮对的发展变化处于停顿的状态,事实上,今天的 Wheelsets are one of the most important parts of a vehicle. The structure of the wheel is relatively stable, unlike some other parts often have major reforms. This is perfectly understandable because the work of the wheelsets must be sufficiently guaranteed for operational safety and the large number of minor changes will affect a great deal of manpower and material resources. Therefore, any changes to the wheelsets must be taken very carefully attitude. Of course, this does not mean that the development and changes in the wheel race are at a standstill. In fact, today’s