在机械加工中常有这种现象:当机床的工作载荷还没有达到额定载荷,却突然发生闷车。维修人员常常是花费不少精力,就是找不出原因。实践证明,这很可能就是因为机床主电动机的皮带松弛,张紧力不够所致。一般认为,皮带张紧力不够,只能出现皮带与皮带轮间的打滑,但与实际情况恰好相? Often in the machining of this phenomenon: when the working load of the machine has not reached the rated load, but suddenly the stuffy car. Maintenance personnel often spend a lot of energy, that is, can not find the reason. Practice has proved that this is probably because the machine main motor belt laxity, tension is not enough due. Is generally believed that the belt tension is not enough, there can only be a slip between the belt and the pulley, but exactly the same phase with the actual situation?