基于功率曲线法的游梁式抽油机曲柄平衡调整模型

近些年,游梁式抽油机电机功率测试越来越普及,如何利用功率曲线数据信息指导抽油机节能运行变得更加重要。以抽油机平衡准则为基础,开展了利用功率曲线数据进行曲柄平衡抽油机调平衡方法的研究。研究中,结合生产现场实际情况,利用电动机功率与传到曲柄轴上的扭矩的关系,建立了曲柄平衡块位置改变量与电机输出功率改变量的关系,依据不同的抽油机平衡准则,分别建立了峰值功率法曲柄平衡块调整量计算模型和均方根功率法曲柄平衡块调整量计算模型。计算表明,与平均功率法和峰值功率法相比,均方根功率法能耗最小,有利于进一步挖掘抽油机节能潜力。

Calculation Model of Balance Adjustment Using Power Curve for Beam Pumping Unit

In recent years, motor power test for beam-pumping unit gains increasing popularity, thus it turns more important to utilize power curve data to direct pumping unit to operate efficiently. Based on pumping unit equilibrium criterion, research on equilibrium adjustment method of crank-balanced pumping unit utilizing power curve data is carried out. In this research, with actual situation in production site considered and the relationship between motor power and crank axle torque utilized, the relationship between crank counterbalance position change and motor output power change is built. Crank counterbalance position adjustment calculation models using peak power method and root mean square power method are built respectively for different kinds of pumping unit equilibrium criterion. The calculation results show that compared to average power method and peak power method, root mean square power method gains the minimum energy consumption, which is conducive to tap the potential of pumping unit energy conservation for the next step.