Dynamic simulation and efficiency analysis of beam pumping system
来源期刊：中南大学学报(英文版)2015年第9期
论文作者：Xing Ming-ming Dong Shi-min Tong Zhi-xiong Tian Ran-feng Chen Hui-ling
文章页码：3367 - 3379
Key words：beam pumping system; surface transmission system (STS); sucker rod string (SRS); system efficiency; dynamic simulation
Abstract: An improved whole model of beam pumping system was built. In the detail, for surface transmission system (STS), a new mathematical model was established considering the influence of some factors on the STS’s torsional vibration, such as the time variation characteristic of equivalent stiffness of belt and equivalent rotational inertia of crank. For the sucker rod string (SRS), an improved mathematical model was built considering the influence of some parameters on the SRS’s longitudinal vibration, such as the nonlinear friction of plunger, hydraulic loss of pump and clearance leakage. The dynamic response and system efficiency of whole system were analyzed. The results show that there is a jumping phenomenon in the amplitude frequency curve, and the system efficiency is sensitive to motor power, pump diameter, stroke number, ratio of gas and oil, and submergence depth. The simulation results have important significance for improving the efficiency of beam pumping system.
Xing Ming-ming(邢明明), Dong Shi-min(董世民), Tong Zhi-xiong(童志雄), Tian Ran-feng(田然凤), Chen Hui-ling(陈慧玲)
(School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China)
Abstract:An improved whole model of beam pumping system was built. In the detail, for surface transmission system (STS), a new mathematical model was established considering the influence of some factors on the STS’s torsional vibration, such as the time variation characteristic of equivalent stiffness of belt and equivalent rotational inertia of crank. For the sucker rod string (SRS), an improved mathematical model was built considering the influence of some parameters on the SRS’s longitudinal vibration, such as the nonlinear friction of plunger, hydraulic loss of pump and clearance leakage. The dynamic response and system efficiency of whole system were analyzed. The results show that there is a jumping phenomenon in the amplitude frequency curve, and the system efficiency is sensitive to motor power, pump diameter, stroke number, ratio of gas and oil, and submergence depth. The simulation results have important significance for improving the efficiency of beam pumping system.
Key words:beam pumping system; surface transmission system (STS); sucker rod string (SRS); system efficiency; dynamic simulation
