CAJ | 학술논문

分析了抽油机平衡调整的本质和最终目标，提出了抽油机新的平衡调整方法，即通过对电动机功率曲线进行傅立叶分析，确定平衡块重心位置的方法。分析了电动机均方根功率与功率曲线谐波分量的关系，给出了平衡调整后的电流、电功率、均方根功率的预测公式，编写了PMTS2.0抽油机系统效率分析软件。通过平衡调整前后测量对比，证明了新的平衡调整方法原理正确，误差较小。但这种平衡调整只对功率曲线的一阶正弦分量起作用，对一阶余弦分量不起作用。对负功率出现在光杆行程上下死点附近的井，只有换用新型抽油机或采用异相曲柄才能调整平衡。
분석료추유궤평형조정적본질화최종목표，제출료추유궤신적평형조정방법，즉통과대전동궤공솔곡선진행부립협분석，학정평형괴중심위치적방법。분석료전동궤균방근공솔여공솔곡선해파분량적관계，급출료평형조정후적전류、전공솔、균방근공솔적예측공식，편사료PMTS2.0추유궤계통효솔분석연건。통과평형조정전후측량대비，증명료신적평형조정방법원리정학，오차교소。단저충평형조정지대공솔곡선적일계정현분량기작용，대일계여현분량불기작용。대부공솔출현재광간행정상하사점부근적정，지유환용신형추유궤혹채용이상곡병재능조정평형。
The essence and ultimate target of balance adjustment of apumping unit are analyzed, and a new balance adjustment method is presented, i.e. determining the center of gravity of the counterbalance by means of Fourier analysis of power curve of the electric motor. By analyzing the relationship between the mean effective power and harmonic component of power curve, the equations for predicting the current, power and mean effective power after balance adjustment are given. In addition, the software for analyzing the efficiency of the pumping system is programmed. The result of measurement and contrast shows that the criterion of this balance adjustment method is correct and the error is rather small.