液力推力器花键联接结构优化设计  

Optimal Design of Spline Connection Structure of Hydraulic Thruster

作　　者：郭朝辉 龚盼 冯定[2,3,4] 王鹏[2,3] 涂忆柳[2,3] Chaohui Guo;Pan Gong;Ding Feng;Peng Wang;Yiliu Tu(Research Institute of Petroleum Engineering,SINOPEC,Beijing;School of Mechanical Engineering,Yangtze University,Jingzhou Hubei;Engineering Research Center for Oil and Gas Drilling and Completion Tools in Hubei Province(Yangtze University),Jingzhou Hubei;Hubei Cooperative Innovation Center of Unconventional Oil and Gas(Yangtze University),Wuhan Hubei)

机构地区：[1]中石化石油工程技术工程院,北京 [2]长江大学机械工程学院,湖北荆州 [3]湖北省油气钻完井工具工程技术研究中心(长江大学),湖北荆州 [4]非常规油气湖北省协同创新中心(长江大学),湖北武汉

出　　处：《石油天然气学报》2018年第1期60-67,共8页Journal of Oil and Gas Technology

摘　　要：液力推力器具有水力柔性加压的特点,广泛应用于钻压不易施加的水平井、大位移延伸井等。液力推力器在工作时,关键部件花键联接结构的磨损较为严重,失效率高。针对该问题,笔者充分考虑芯轴所受轴向压力、径向压力、扭矩和位移载荷等多种因素作用,建立了花键联接结构瞬态接触的有限元模型。借助正交试验法设计实验方案,开展了花键联接结构的齿数、齿根圆角和内圆直径3个关键结构参数对其性能的敏感性分析。最后建立花键联接结构参数优化的数学模型,并采用SQR算法对数学模型进行优化。结果表明,优化模型相比初始模型有效降低了响应量数值,其综合指标值降低约24.9%。该研究为液力推力器的设计提供了理论依据。Hydraulic thruster was characterized by flexible hydraulic compression,which has been widely used in horizontal wells and extension wells,in which drilling pressure was not easy to be exerted.However,in the working process of hydraulic thrusters,its spline connection structure of the key component was serious worn and had high failure rate.Aiming at this problem,a finite element model of transient sliding contact was established in consideration of the axial compressive force,the radial pressure on the inner and outer surface,the torque and the displacement load of the mandrel.Through the test program using the orthogonal experiment,the sensitivity analysis of the key structure parameters of number of tooth,its root fillet and inner circle diameter on its performance was carried out.Finally,the mathematical model is established for the optimal design of connection structure,and then it is optimized for obtaining the optimal combination of parameters using SQR programming.The results show that compared with the initial model,the optimized model effectively reduces the response value by about 24.9%.The research result provides a theoretical basis for the design of hydraulic thrusters.

关 键 词：液力推力器 联接机构 正交试验 有限元仿真 优化设计 

分 类 号：TU318[建筑科学—结构工程]