The hydraulic fluid viscosity, the volumetric efficiency and the hydraulic system working efficiency drops, divulging increases, even causes the mechanical device to be unable the normal work.
液压油黏度、容积效率和液压系统工作效率均下降，泄漏增加，甚至使机械设备无法正常工作。
The test method of pressure loss, flow loss and frictional force loss etc. of the hydraulic pumping units is presented, from which the mechanical efficiency and volumetric efficiency are obtained.
给出了测取液压抽油机系统压力损失、流量损失以及油缸的摩擦力损失等的方法，并由此求出系统的机械效率与容积效率。
The hydraulic agitation and the mechanical agitation are combined in the invention, thereby the efficiency of coagulation and agitation is improved;
本发明联合水力搅拌和机械搅拌，提高了混凝搅拌的效率；
The hydraulic agitation and the mechanical agitation are combined in the invention, thereby the efficiency of coagulation and agitation is improved;
本发明联合水力搅拌和机械搅拌，提高了混凝搅拌的效率；
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