为了提高铁路客车用滚动轴承可靠性,适应铁路运输的发展,确保旅客列车的运行安全,铁道部要求对现有旅客列车的轴承进行更新。由于原有铁路客车轴承设计结构落后,材料不合理,加上国内路轨状况较差,转弯半径小以及润滑脂质量低劣等因素,老结构的铁路轴承可靠性差、寿命低,往往达不到八十万公里的安全行驶要求。 In order to improve the reliability of railway rolling stock with rolling bearings, to adapt to the development of railway transportation, and to ensure the safety of passenger trains, the Ministry of Railways requires updating the bearings of existing passenger trains. Due to the backward structure and unreasonable materials of the existing railway passenger car bearings, coupled with the poor domestic rail conditions, small turning radius and poor grease quality, the reliability of old railway bearing structures is poor and the life expectancy is often low, often less than 80 Wanli safe driving requirements.