我国铁路车辆中,30吨貨车还占有相当大的比例,而30吨貨车所用的转向架,绝大多数是拱板式转向架(转15、转37、转38等),这都是一些旧型转向架。近几年以来,由于牵引力和运行速度不断的提高,在运用中,不断出现枕弹簧、拱架柱螺栓、拱板断裂等惯性事故,严重地影响了运输安全和运输效率的提高,已不能适应铁路运输事 In China’s railway vehicles, 30 tons of trucks also occupy a considerable proportion of the 30-ton truck used bogie, the vast majority of arch-type bogie (turn 15, turn 37, turn 38, etc.), which are some Old bogies. In recent years, inertial accidents such as pillow spring, arch bolt, arch fracture and the like have been continuously occurred due to the continuous increase of traction and running speed, which has seriously affected the improvement of transportation safety and transportation efficiency and has not been adapted Railway transport