本文根据抽油机悬点负荷在减速箱曲柄轴上产生的扭矩的波动性,提出了一种能够有效地减小电动机输出扭矩的波动、提高电动机效率的抽油机旋转平衡新方法—一、二次谐波消去法,并与常规曲柄平衡法或定相曲柄平衡法就曲柄轴扭矩和周期负荷因子两方面作了比较。结果说明,一、二次谐波消去法比常规曲柄平衡法和定相曲柄平衡法优越。 Based on the fluctuation of torque generated on the crankshaft of the gear box by the hanging load of the pumping unit, this paper presents a new method of pumping unit rotation balance that can effectively reduce the output torque ripple and improve the motor efficiency. Second harmonic cancellation method, and compared with the conventional crank balance method or the crankshaft balance method crankshaft torque and cycle load factor were compared. The results show that the first and second harmonic elimination method is superior to the conventional crank balance method and the phased crank balance method.