CAJ | 학술논문

抽油机变速运行技术应用于国内多个油田，对其效果的评价也不一致。基于抽油机变速耦合运行理论建立了数学模型，并对其“节能降载”效果进行了综合评价和分析，结果表明：变速运行技术可以降低电机功率和电机扭矩，降低减速箱扭矩和悬点峰值载荷，但是“超冲程”现象不明显，泵载荷增加；变速运行技术能够较好地适应冲程、冲次、沉没度的变化，但是在平衡效果不好的情况下会出现“超扭矩”的不利因素，尤其是当变速运行曲线的初始相位角有偏差时，会严重影响整个抽油机系统的综合工作性能，造成无法启机或突然停机。
추유궤변속운행기술응용우국내다개유전，대기효과적평개야불일치。기우추유궤변속우합운행이론건립료수학모형，병대기“절능강재”효과진행료종합평개화분석，결과표명：변속운행기술가이강저전궤공솔화전궤뉴구，강저감속상뉴구화현점봉치재하，단시“초충정”현상불명현，빙재하증가；변속운행기술능구교호지괄응충정、충차、침몰도적변화，단시재평형효과불호적정황하회출현“초뉴구”적불리인소，우기시당변속운행곡선적초시상위각유편차시，회엄중영향정개추유궤계통적종합공작성능，조성무법계궤혹돌연정궤。
The variable speed operation technology of the pumping unit is used in a number of domestic oilifelds, and evaluation on its efifciency also varies. A mathematic model has been built based on the variable speed coupling running theory of the pumping unit, and its“energy-saving and load-reduction”effectiveness was comprehensively evaluated and analyzed. The result shows that the variable speed operation technique can reduce the motor power and motor torque, reduce the reduction gearbox torque and peak load on suspension point;however, the“over-stroke”phenomenon is not obvious, and the pump load increases. The variable speed operation technique can favorably adapt to the changes of strokes, stroke frequency and submergence, but under poor balance effectiveness, the unfavorable element of“over-stroke”may occur, esp. when the initial phase angle of variable speed operation curve has deviation, then it will heavily affect the overall working performance of the entire pumping system, leading to failure of startup or sudden shutdown.