以TY180推土机工作装置液压系统为研究对象,分析了系统的结构组成、故障形式及其形成的原因,引用了基于故障树分析的推土机工作装置液压系统故障诊断方法,绘制了工作装置液压系统故障的故障树。该方法可以简化诊断的过程,是故障和原因的逻辑关系更清晰明了,依据该法进行排查和诊断,为工程机械液压系统故障检测与维修提供一定的理论依据,提高机械工作的可靠性。 Taking the hydraulic system of TY180 bulldozer working device as the research object, the structure, failure mode and reason of the system are analyzed. The fault diagnosis method of bulldozer working device hydraulic system based on fault tree analysis is cited, and the hydraulic system failure of working device is drawn Fault tree. The method can simplify the process of diagnosis, clarify the logical relationship between the fault and the cause, and conduct investigation and diagnosis according to the method to provide a theoretical basis for the fault detection and maintenance of the hydraulic system of construction machinery, so as to improve the reliability of the mechanical work.