偏心回转油气混输泵关键部位摩擦特性分析

Friction Characteristics of Key Parts Eccentric Rotary Oil-Gas Multiphase Pump

提出一种新型的偏心回转油气混输泵,介绍了该泵的工作原理及结构特点。根据该泵主要运动部件的运动规律和力学特性,导出各运动部件的运动、受力的计算公式,推导出该泵关键部位摩擦力及摩擦功耗随主轴转角的变化关系,分析了主要结构参数对泵的摩擦特性的影响。结果表明:偏心回转油气混输泵滑板圆头端的摩擦功耗低于滑板摩擦功耗的2%;泵的摩擦功耗随着相对偏心距的增大而增大,油缸相对高度对该泵摩擦功耗的影响可以忽略不计。研究结果为偏心回转油气混输泵的优化设计提供了理论基础。

A new Eccentric Rotary Oil-gas Multiphase Pump is proposed and its working principle and structural characteristics are described. According to the kinematic law and mechanical characteristic of the pump＇s moving parts, the formulas of the motion and acting force were deduced. And the variation of the friction forces acting on the pump and the friction power loss with the rotation angle were deduced and the influence of main structural parameters on the frictional loss are investigated. The results show that the frictional loss between the ball end of the sliding vane and the rotor is less than 2% of the sliding vane frictional loss. The frictional loss on the pump increase with the increase of the relative eccentricity, and relative height of the cylinder to the frictional loss is negligible. The present results offer theoretical basis for the optimum design of the eccentric rotary oil-gas multiphase pump.