在左、右动力腔的交替驱动下，HFPE的活塞组件在腔体中作往复直线运动，同时泵出液压油驱动负载工作。

In a HFPE, the free piston assembly is driven back and forth between two outer dead centers by fuel energy, and at the same time hydraulic oil is pumped out for energy.

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液压驱动的钻井泵采用变量液压泵和动力油缸组成液压钻井泵的动力端；液力端和现在使用的三缸单作用活塞式钻井泵相同。

Hydraulic dive drilling pump adopts variable hydraulic pump and dynamic cylinder as its power end and its fluid end is identical with the triplex single acting piston pump.

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该液压泵还包括能够在圆柱形腔(3)中移动的活塞(5)以及与所述圆柱形腔(3)流体连通的流体贮液器(12)。

A piston (5) is movable in the cylindrical cavity (3) and a reservoir (12) of the fluid is in fluid communication with the cylindrical cavity (3).

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