在同等功率情况下，液压装置结构紧凑，体积小，重量轻，惯性小，反应快，易于实现快速启动、制动和频繁的换向，因此在起重机、挖掘机、装载机等设备上普遍应用。但由于液压元件对油液的污染比较敏感，这就要求对液压系统必须正确使用和维护。同时，由于液压元件的制造精... Under the same power conditions, the hydraulic device has the advantages of compact structure, small size, light weight, small inertia, fast response, easy start-up, braking and frequent commutation. Therefore, it is widely used in cranes, excavators, loaders and other equipment . However, due to hydraulic components of the oil pollution is more sensitive, which requires the hydraulic system must be the proper use and maintenance. At the same time, due to the manufacture of hydraulic components ...