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排查挖掘机液压系统故障通常采用简易故障诊断法和逻辑分析法。简易故障诊断法适宜排查简单故障,先通过问、看、听、摸、闻等手段了解挖掘机各部位的工作情况,查找故障部位。逻辑分析法先根据故障现象和液压系统原理图,分析所有可能产生故障的原因,再提出判断故障的方法和步骤。本文以3例挖掘机故障为例,介绍如何运用逻辑分析法进行故障排查。
Troubleshoot excavator hydraulic system failures are usually simple fault diagnosis and logic analysis. Simple troubleshooting method suitable for troubleshooting simple trouble, first by asking, watching, listening, touching, smell and other means to understand the work of excavators in various parts of the fault location. The logic analysis method first analyzes all the possible reasons for the fault according to the fault phenomenon and the hydraulic system principle diagram, and then proposes the method and the step for judging the fault. In this paper, three cases of excavator fault, for example, describes how to use logical analysis for troubleshooting.