我公司露天矿66号挖掘机（WK－4）提升机构高速轴的2号轴承，自1998年8月以来经常出现发热问题，影响了该机的正常作业。1提升系统传动结构传动结构参见图1所示，技术参数参见表1、表2、表3。铲斗提升卷标机的所有轴承中，除7号轴承的外因是轴向定位外，其余轴承的外圈都允许轴 My company opencast mine excavator 66 (WK-4) to enhance the institutions of high-speed shaft No. 2 bearing, since August 1998 fever often occur, affecting the normal operation of the aircraft. 1 to enhance the system transmission structure Transmission structure shown in Figure 1, the technical parameters, see Table 1, Table 2, Table 3. Bucket lift all the bearings in the label machine, in addition to the external cause of the No. 7 bearing axial positioning, the rest of the bearing outer ring allows the shaft