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泵-蓄势器传动的液压机,由于采用了蓄势器,故只用流量较小的高压泵。在压机工作的间歇时间将工作液体储存在蓄势器中,当工作需要的时候,再由蓄势器和高压泵同时供给工作缸,工作缸内的大部分液体是由蓄势器供给的。蓄势器内的高压液体(具有势能)进入工作缸是在瞬时之间进行的,具有势能转变为动能作功的特点。因此,它比泵直接传动的压机升压快,但是在使工件产生变形时作的功都是相等的。泵-蓄势器传动的液压机比泵直接传动的液压机效率高。
Pump - power-driven hydraulic machine, due to the use of a storehouse, so only a smaller flow of high-pressure pump. The working fluid is stored in the accumulator at the intermittent time of the press work, and simultaneously supplied to the working cylinder by the accumulator and the high-pressure pump when the work is needed. Most of the liquid in the working cylinder is supplied by the accumulator . The high-pressure liquid (with potential energy) in the accumulator enters the cylinder and is instantaneous, with the potential energy being converted into kinetic energy. Therefore, it is faster than a pump driven directly by the pump, but the work done in the deformation of the workpiece is equal. Pumps - The accumulator-driven hydraulics are more efficient than hydraulic pumps that directly drive the pump.