某型40 t级挖掘机驱动马达螺栓松动故障分析及对策  

Failure Analysis and Remedy of Loosened Bolts in Drive Motor of a 40 t Excavator

作　　者：王德军 王彤 杨宁军 

机构地区：[1]山河智能装备股份有限公司

出　　处：《工程机械》2018年第2期47-52,共6页Construction Machinery and Equipment

摘　　要：挖掘机所处工况比较恶劣,各部件受力情况极其复杂。某型40 t级挖掘机的驱动马达通过螺栓连接安装在履带梁的驱动马达座上,此处螺栓经常出现松动;针对此故障,借助测量数据及受力分析等,找到马达安装板上通孔受力变形的规律,通过力矩平衡分析及校核,查找引起螺栓松动的根本原因,并制定了改进马达安装板材质及安装高强度垫圈等解决措施,避免了故障的再次发生,增强了该型挖掘机的可靠性。Working conditions for the excavator is adverse that stress on the parts is complicated. As a result, for a 40 t excavator where the drive motor is bolted to the motor seat in the track beam which has led to frequent looseness of the bolts. In view of such a trouble and by means of data measured and stress analyses to have found out a law of the motor mounting plate where the thru holes deform under stresses and the basic cause of he bolts looseness has been found resolve measures are made to improve the motor mounting plate for better quality with high strength bolts for the motor mounting, thus prevent similar troubles from reoccurring while enhancing reliability of that 40 t excavator.

关 键 词：挖掘机 驱动马达 螺栓松动 可靠性 

分 类 号：TH131.3[机械工程—机械制造及自动化] TU621[建筑科学—建筑技术科学]