我厂煤场仅有一台哈尔滨重型机器厂生产的DQ3025堆取料机,自1982年安装运行以来,由于存取煤任务重,悬臂在各个方位工作时间不均匀,使回转机构的交叉滚子轴承严重磨损且磨损程度不均匀,从1987年末开始,堆取料机的回转角度开始由设计值(±165°)逐渐减小,直到1989年下半年,悬臂只能在100°范围内工作,严重地影响了生产存取煤,因此,必须更换回转交叉滚子轴承。 I plant only a coal yard Harbin heavy machinery plant production DQ3025 stacker reclaimer, installation and operation since 1982, due to heavy coal access tasks, cantilever working time in all directions uneven, so that the cross-roller slewing bearing Severe wear and uneven wear. Starting from the end of 1987, the swing angle of the stacker and reclaimer began to decrease gradually from the designed value (± 165 °). Until the second half of 1989, the cantilever could only work within a 100 ° range, Affected the production of coal access, therefore, must replace the rotary cross roller bearings.