1993年4月,我厂2t/h冲天炉鼓风机因4个向心滚动轴承被烧毁而进行维修,但使用不到半年时间,鼓风机机体出现严重发热现象,并伴有不定时的异常响声。经拆卸下机体两侧轴承座上盖检查,滚动轴承无明显异常。后又仔细观察则发现主轴台肩与垫圈及轴承之间有0.5mm间隙,经了解,前次维修时也有约2mm的磨损间隙,该垫圈为前次维修时新车配的。据此分析: In April 1993, the 2t / h cupola blower of our factory was repaired due to the 4 radial rolling bearings being burnt down. However, less than half a year’s time, the blower body appeared serious fever and accompanied by irregular abnormal sound. After the demolition of the upper body cover on both sides of the bearing inspection, no significant bearing anomalies. After careful observation, it was found that there was a gap of 0.5 mm between the shoulder of the spindle and the washer and the bearing. It is understood that there was also an abrasion gap of about 2 mm in the previous maintenance, which was provided for the new car in the previous maintenance. According to this analysis: