大型工程机械的回转支承装置（简称大轴承），在以往的运行管理中一直是一个比较棘手的关键部件（见图贝），因为：第一，大轴承故障诊断比较困难，由于它采用全封闭的交叉滚柱结构，一般情况下，即使是经验丰富的技术员，也很难直接判断大轴承运转是否正常，曾发生因误判而造 Large-scale construction machinery, slewing ring bearing device (referred to as the large bearing), in the past, operation and management has been a key part of the more difficult (see Figure Pui), because: First, the large bearing fault diagnosis is more difficult due to its fully enclosed Of the cross-roller structure, under normal circumstances, even experienced technicians, it is difficult to directly determine whether the normal operation of large bearings, has occurred because of miscarriage of justice