我公司现役WK－10B挖掘机，其支承回转装置经常出现早期磨损及其它更严重的现象，（1）滚子和轨道的工作表面严重磨损，有时小齿轮明显下沉；（2）圆锥滚子大头凸缘内侧磨损严重而报废；（3）下轨道压溃，发生塑性碾边；（4）隔离圈散裂，滚子蹦出。以上现象均需更换滚子，而更 Our active WK-10B excavator, bearing slewing device often appear early wear and tear and other more serious phenomena, (1) the work surface of the roller and the track wear and tear, and sometimes pinion obviously sinking; (2) tapered roller Large flange inside the serious wear and scrapped; (3) the next track crushed, plastic milling side; (4) isolation ring spalling, the roller pops out. The above phenomenon need to replace the roller, and more