高速机车、球磨机和发电机等大型设备的主轴经常 工作在持续高速重载转动环境下，主轴受较大的冲击和振动，极易导致轴承温度升高。当轴承磨损和产生缺陷时，这些轴承的不正常发热增大，轻则热轴、固死，造成机损，影响设备运转，重则造成疲劳破坏和热切轴，发生重大事故，因此 The main shaft of large equipment such as high-speed locomotive, ball mill and generator often works under the circumstance of continuous high-speed and heavy-load rotation. The main shaft is subject to large impact and vibration, which can easily lead to bearing temperature increase. When the bearing wear and produce defects, these bearings increase the abnormal heat, ranging from the hot shaft, solid death, resulting in machine damage, affecting the operation of equipment, but also caused by fatigue damage and hot shaft, a major accident, therefore