近年来对客车甩车事故的分析指出,黄铜保持架过早疲劳破坏是引起轴箱部件过热的一个主要原因。在车辆段全面检查轴箱及检修轴承时,保持架因端圈裂纹及断裂而报废。保持架损坏,大部分发生在冬季运行期问,那时线路刚性增大,因而作用在轴箱及其零部件上的垂直惯性载荷也相应增大。保持架裂纹通常发生在保持架端圈与横梁的连接处,并沿平行于横梁的轴线方向继续发展。我们知道,车辆运行时,滚子轴承保持架的角速度并不等于车轴的转速。保持架的转速取决于轴承内、外圈及滚子的尺寸大小。此时,保持架承受着不同方向、不同大 In recent years, the analysis of the accident of turning off the bus indicates that the fatigue damage of the brass cage is a major cause of the overheating of the axle box components. When inspecting the axle box and overhauling the bearing in the depot, the cage will be scrapped due to crack and breakage of the end ring. Cage damage, most of which occurs during winter operation, as the line stiffness increases and consequently the vertical inertial load acting on the axlebox and its components increases accordingly. Cracks in the cage usually occur at the juncture of the cage end rings with the beam and continue to develop parallel to the axis of the beam. We know that when the vehicle is running, the angular velocity of the roller bearing cage does not equal the axle speed. Cage speed depends on the bearing, the outer ring and the size of the roller. At this point, the cage to withstand different directions, different large