【作者】 吴赓；

【导师】 姚立纲；

【作者基本信息】 福州大学 ， 机械设计及理论， 2004， 硕士

【摘要】 螺杆泵采油技术具有投资少、效率高、适应性广和故障率低等特点已经广泛地应用于油田采油生产中。目前螺杆泵采油系统采用地面电机和减速装置通过细长抽油杆驱动井下螺杆泵，这种驱动方式由于抽油杆旋转时处于长期循环扭曲状态，系统很容易出现故障。因此，为保证安全和高效率采油生产，需要将螺杆泵由地面驱动改为井下驱动。本文针对螺杆泵采油生产中井下驱动螺杆泵采油系统需要的一种体积小、传递功率大的减速器为研究目标，对井下驱动减速器的类型选择、结构设计、仿真、制造和实验等进行设计研究。首先根据收集到的相关资料综合介绍国内外机械采油技术的发展历史、现状和发展趋势。对目前使用的各种减速器进行结构分析和论证，结合国内外的研究和设计情况，并根据井下螺杆泵的工作条件，提出封闭式功率分流行星减速器作为联接潜油电机驱动螺杆泵工作的减速器的方案。完成了减速器的结构设计方案的可行性分析，并在理论上推导出了减速器的传动比计算公式，各个行星轮受力力矩计算公式和减速器的效率计算公式。根据井下工作的实际条件和要求的减速器传动性能，建立了以减速器体积最小为优化目标的减速器优化设计数学模型，确定了优化设计的设计变量和约束条件，通过编写程序运行，完成了对优化模型的求解，得到了减速器的最佳传动参数。应用优化设计结果，用实例进一步论证减速器的优化参数满足井下驱动螺杆泵减速器的传动比、效率、功率分流分配以及外形尺寸等要求。提出利用联接花键间隙实现行星轮均载的原理和结构，实现了行星轮的均载。最后完成了提出的减速器的结构设计，并利用三维建模软件Solidworks对整个减速器进行CAD三维参数化实体造型建模、虚拟零件、部件设计及虚拟装配，直观再现整个减速器工作状态的真实情况，完成减速器装配体的干涉检查和转动仿真检查。完成减速器主要零部件有限元应力分析和变形分析，得出零件在受载情况下的应力应变图和相应零件受载应力分布周期变化图。根据机械设计手册确定减速器零件的制造工艺、合理结构、使用材料和热处理方法等，完成减速器样机制造和装配。安装调试减速器，进行减速器的性能测试试验，分析所得实验数据，评估减速器的应用性能。更多还原

【Abstract】 The oil production technology utilizing the progressing cavity pump system has the properties of high adaptive, high efficiency, low running fault and running cost, and now has been used more and more widely. But, at the present situation, the down hole progressing cavity pump is driven by the motor and reducer placed on the ground via a thin and long rod, and this cause troubles easily because of the rod works in cycling bending and distortion. So, in order to assure the safety and high efficiency for oil production, it is necessary to place the motor and reducer in down hole to drive the pump directly. This paper focus on the development of a kind of a reducer directly connected to the down hole progressing cavity pump. This development includes the selection of reasonable structure, designing, simulation, manufacturing and testing of the reducer which has the properties of high horsepower to weight ratio and compactness. At first, base on the researching achievements both in home and abroad, the current situation and future development trend of the mechanical oil production technology are presented. By analyzing the different kinds of in use reducer and integrating the current research and considering the down hole operating condition, a kind of closed loop power distributional planetary gear reducer is put forward as a proper reducer to directly connecting the motor and the progressing cavity pump. The feasibility analysis for the proposed reducer is completed, the equations of speed reduce ratio, the bearing torque of each planetary gear, and efficiency of the reducer are developed. Based on the down-hole working condition and the required capability of the reducer, the mathematic module for the reducer optimal design as the function of minimum volume is proposed, the design variable and restrain conditions are determined, and by solving the optimal module, the optimal parameters of the reducer are obtained. By utilizing the optimal parameters, a design case is completed to further verify the speed ratio, efficiency, the power distribution ratio, and the<WP=4>dimension of the reducer. The load distribution method by using the gap of spline which connecting the gear and the shaft in the reducer is put forward. The structure design, 3D modeling, virtual design of the parts, virtual assemble and interference, and the rotating simulation of the reducer are completed by using Solidworks. The finite element analysis for the main parts of reducer is fulfilled and the stress and deformation curves of the main parts in a running cycle are also obtained. Finally, base on the mechanical design manual, the manufacturing techniques, the material, the structure, the heat treatment methods, et al. are determined, and the prototype reducer for down hole use is manufactured, assembled and tested.更多还原