悬臂式斗轮机俯仰故障由以下两个原因造成,一是俯仰机构特别是铰点阻力过大,二是斗轮机在使用一定年限后接地压力升高。为避免或减缓悬臂斗轮机俯仰机构发生此类问题,我们将臂架和配重铰点轴承改为进口自润滑关节轴承,将滑动轴承全部改为增加油脂润滑;另外,斗轮机在运行一段时间后应进行配重的维护,并及时清理臂架上的积煤。 Pitot bucket bucket pitching caused by the following two reasons, one is the pitch mechanism, especially the hinge point of resistance is too large, and second, bucket bucket in use after a certain number of years the ground pressure rise. In order to avoid or slow down such problems in the cantilever bucket wheel pitching mechanism, we changed the jib and counterweight hinge bearings to self-lubricating plain bearings and changed all the sliding bearings to grease lubrication. In addition, the bucket wheel was running for a period of time After the balance should be maintained, and promptly clean up the coal accumulation on the boom.