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功率回收型液压抽油机采用转速控制的二次调节液压系统， 其主要特点是泵和二次元件马达（ 可用作泵） 之间所接的蓄能器消除了两者之间流量和功率的直接联系， 并使功率储存和回收成为可能。为对这种抽油机的速度控制及功率回收率的原理性应用做基础研究， 通过比较， 确定以机液反馈二次调节系统为驱动部分， 与蓄能器相连的液压缸为加载部分， 配以适当的检测与显示装置， 设计并建立了功率回收型液压抽油机模拟实验系统。
Power recovery hydraulic pumping unit with speed control of the secondary adjustment hydraulic system, the main feature is the pump and the secondary components of the motor (which can be used as a pump) connected between the accumulator eliminates the flow and power between the two The direct contact, and the power storage and recovery possible. In order to do a basic research on the principle application of the speed control and power recovery rate of this kind of pumping unit, it is determined that the hydraulic cylinder connected with the accumulator is the loading part driven by the secondary regulation system of liquid-liquid feedback through comparison, With the appropriate detection and display device, the design and establishment of a power recovery hydraulic pumping unit simulation experimental system.