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我单位一台上海WY100反铲挖掘机,在施工过程中出现动臂自落较快的故障现象,由于工程已接近尾声,故未对其故障进行现场处理,机器“带病”工作,动臂自落的速度也逐渐加快,直到工程结束。 该机回厂后,我们根据故障现象和以往的修理经验进行分析后认为,造成动臂自落的主要原因有:动臂缸内泄;操纵阀内泄;连接管及管接头漏油。 鉴于在日常修理中因动臂缸油封密封不严而产生内泄的故障较多,所以我们首先拆检了动臂缸,结果发现活塞上的油封背面有较大面积的橡胶剥落,且弹力下降、手感有点发硬。由此认为,动臂自落快是由于动臂缸油封内泄所造成的。于是,更换了两动臂
I unit a Shanghai WY100 backhoe excavator, the boom appeared in the construction process faster failure phenomenon, as the project has come to an end, it failed to on-site treatment of its failure, the machine “sick” work, boom Self-falling speed is also gradually accelerated until the end of the project. After the machine back to factory, we analyze the fault phenomenon and the previous repair experience that the main reasons for the boom self-drop: the boom cylinder leakage; control valve leakage; connecting pipe and fittings leakage. In view of the daily repair due to unscrupulous sealing of the boom cylinder seal and internal leakage caused more failure, so we first disassemble the boom cylinder and found that the piston seal on the back of a larger area of rubber spalling, and elastic drop , Feel a bit stiff. Therefore, the boom is due to the boom cylinder oil seal leakage caused. So, replaced the two booms