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挖掘机回转大齿圈的损坏形式主要是轮齿异常磨损或折断。轮齿异常磨损可分为齿面点蚀、剥落或急剧磨损、齿根或齿顶疲劳剥落。引起轮齿损坏的原因是:润滑黄油过脏或不足,致使金属干摩擦;进入异物(尤其是硬质磨粒);固定齿圈的螺丝松动;进入泥砂和水;使用操作不当。1 采用刨削和焊接修复中小型挖掘机的回转齿圈直径达1.4～
The damage of the rotating ring gear of the excavator is mainly caused by abnormal wear or breakage of the gear teeth. Abnormal wear of gear teeth can be divided into tooth surface pitting, peeling or sharp wear, tooth root or tooth tip fatigue peeling. The cause of tooth damage is: dirty or insufficient lubricating grease, resulting in dry metal friction; foreign matter (especially hard abrasive particles); loose screw fixed ring gear; into mud sand and water; use of improper operation. 1 The use of planing and welding to repair small and medium-sized excavators with a swivel ring diameter of 1.4 to 1