挖掘机回转驱动轴完全断裂的情况虽不多见,但也偶有发生。该轴一旦断裂,整台挖掘机便失去作业能力。该轴断裂后选择修复方案时必须慎重。如我单位一台小松20H-T 挖掘机发生了回转驱动轴突然断裂的故障后,因本地无配件须到深圳采购,新轴加运费需2万多元,且供货时间长。决策部门考虑到新轴价格贵且工期紧张,决定将挖掘机送大修厂焊接修复。表面上看,采取焊接方案修复时间短,比购新轴可节约1万多元,但当断轴焊修后 The case where the rotary drive shaft of the excavator is completely broken is rare but it happens occasionally. Once the shaft breaks, the entire excavator loses its ability to operate. When the axis is broken, the repair scheme must be carefully selected. If a unit of a Komatsu 20H-T excavator in our unit has experienced a sudden failure of the slewing drive shaft, there will be no procurement of spare parts in Shenzhen. The new shaft and freight need more than 20,000 yuan, and the delivery time is long. The decision-making department decided to send the excavator to the overhaul plant for welding repair, taking into account the high price of the new shaft and the tight schedule. On the surface, it takes a short time to repair the welding solution, which can save more than 10,000 yuan compared with the purchase of a new shaft, but after the repair of broken shaft welding