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1.故障现象及分析我单位1台LHM250型港口高架起重机在进行抓斗作业时,其支撑卷扬突然没有动作,且无报警信号。经技术人员在生产现场对该机进行反复检查、观测和分析,认为该故障有2种可能:一是支撑卷扬电气系统出现故障,二是未满足执行支撑卷扬动作的条件。2.卷扬电控系统工作原理LHM250型港口高架起重机共有2个卷扬装置,即支撑卷扬和开闭斗卷扬。每个卷扬装置
1. Symptoms and Analysis I unit LHM250 type port crane in the grapple operation, the support hoist suddenly did not move, and no alarm signal. After repeated inspection, observation and analysis of the aircraft by technicians at the production site, it is considered that the failure has two possibilities: one is that the supporting hoist electrical system is faulty, and the other one is not satisfied with the conditions for carrying out the hoisting motion. 2. Winch electric control system works LHM250 port overhead cranes a total of 2 winch device, that is, support winch and open and win bucket winch. Each winch device