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我公司从意大利引进的一台沉槽机—BH_7液压抓斗,经过几年的使用,液压软管卷取装置BFH系统出现故障,液压抓斗的提升、下降与液压软管的缠绕和放松不同步,不能正常施工作业。从该机的液压系统分析,主泵是一个双联变量泵,由其供抓斗开闭液压油,现抓斗开闭正常,因而说明这部系液压系统元件无故障。发动机输出轴的另一端带动一个三联齿轮泵,见图1。A泵是供冷却系统,工作正常。B、C泵是供绞盘上液压软管卷取装置的BFH液压
After a few years of use, a sinker, the BH_7 hydraulic grabber, was introduced from Italy. The hydraulic hose reeling device BFH system malfunctions. The hydraulic grapple lifting and lowering and hydraulic hose winding and unwinding are not Synchronization, can not be normal construction operations. From the analysis of the hydraulic system of the machine, the main pump is a double variable pump, which is used to open and close the hydraulic oil by the grab, and the grab is opened and closed normally, thus indicating that there is no fault in the hydraulic system components of this department. The other end of the engine output shaft drives a triple gear pump, see Figure 1. A pump is for cooling system and works normally. B and C pumps are BFH hydraulic pressure for hydraulic hose reeling device on winch