新型液压抽油机的节能设计与仿真

Energy-saving Design and Simulation of New Hydraulic Pumping Unit

液压抽油机技术由于显著的节能效果而发展很快,以节能降耗为目的设计了一套液压抽油机系统。在机械结构方面,该系统采用机械配重的方法来完全平衡抽油杆的重量,使得抽油杆下降的势能储存在配重中并在上升抽油时重新利用,从而减小了系统的装机功率而节能;在液压控制方面,该系统利用了电液比例负载敏感技术,使压力和流量实时自动适应负载的需求,达到了高效节能和准确的控制。通过参数理论分析计算,表明该新型液压抽油机装机功率和在工作循环周期内消耗的功率比同类抽油机均低。在AMESim环境下建立了电液比例负载敏感系统的测试模型,并验证了该模型的正确性。在此基础上建立了整机系统的仿真模型,通过仿真和分析证明了该新型液压抽油机的节能效果。

The technology of hydraulic pumping units is developing very fast because of the remarkable energy-saving effect. In this study, a set of system of hydraulic pumping unit is designed innovatively for saving energy and reducing energy consumption. At the aspect of the mechanical structure, the weight of the sucker rod is balanced completely by means of a counterweight, which makes the descending potential energy of the sucker rod stored up in the counterweight and reused for pumping oil next time. This reduces the installation power of the system and reaches the purpose of saving energy. In hydraulic pressure control aspect, the system utilizes electro-hydraulic proportional load-sensing technology to make the pressure and flow meet the requirement of the load simultaneously and adjust adaptively in real time. This study reaches the goal of high efficiency, saving energy and accurate control. Then, the main system parameters are analyzed and calculated theoretically. It can be seen from the results that the installation power and power consumed in a working circle are lower than similar pumping units. A test model of the electro-hydraulic proportional load-sensing system is built in AMESim and the correctness of the model is verified through simulation. On this base, the simulation model of the whole pumping unit is built in AMESim and the energy-saving effect of the new hydraulic pumping unit is proved after simulation and analysis.