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一台柳工ZL50G型装载机施工中出现动臂下降缓慢故障,同时出现动臂下降时液压油箱液面却迅速升高的现象,严重时从加油口往外喷油;动臂下降时,加大油门,装载机剧烈抖动。 该机先导型工作装置液压系统原理如附图所示。 从原理图可知,正常工作时,操作动臂下降,从液压泵来的液压油进入动臂缸的有杆腔,因有杆腔的有效截面积比无杆腔的大,再加上工作装置自重,所以,装载机动臂下降速度比起升速度要快。现在出现动臂下降速度远远低于
A Liugong ZL50G-type loader appeared slow boom slowdown in the construction, at the same time there boom boom hydraulic tank but the phenomenon of rapid increase in the phenomenon of serious fuel injection from the mouth; boom down, increase Throttle, loader fierce shaking. The machine pilot-type hydraulic device working principle as shown in the figure. It can be seen from the principle diagram that during normal operation, the operating boom is lowered and the hydraulic oil from the hydraulic pump enters the rod chamber of the boom cylinder. Because the effective cross-sectional area of the rod chamber is larger than that of the rodless chamber, coupled with the working device Deadweight, therefore, the loader boom descend faster than the hoist speed. Booms now appear to fall much faster than