长短径比对不对称转子泵性能的影响  

The Effect of Long-to-short Radius Ratio on the Performance of Asymmetric Rotor Pump

作　　者：李琴[1] 米艳梅 黄志强[1] 王美玲 魏强 LI Qin;MI Yanmei;HUANG Zhiqiang;WANG Meiling;WEI Qiang(School of Mechanical Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500)

机构地区：[1]西南石油大学机电工程学院,四川成都610500

出　　处：《液压与气动》2024年第12期23-31,共9页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51974272);四川省自然科学基金(2022NSFSC0402)。

摘　　要：为了提高泵的输送性能,改善受力情况,提出了一种不对称转子泵的新结构。建立了不对称转子的数学模型,并利用CFD数值模拟研究了转子长短径比对其性能的影响规律。结果表明:长短径比对泵腔内流体流动状况、流量脉动特性及转子受力影响显著。随着长短径比的增加,泵腔内流体流速逐渐增加,漩涡数量先减少后增多,主转子径向受力逐渐增大,在长短径比为1.52时的径向力均值相比于1.12时增大26.9%,容积效率的增加逐渐提高,出口流量的次级脉动得到有效抑制,流量脉动系数先减小后增大。当长短径比为1.28~1.44时,泵的容积效率较高,泵腔内部流动较平稳,转子受力情况较好。为采用不对称结构和调整长短径比来优化转子泵的设计提供了理论依据。To enhance the conveying performance and force conditions of the pump,a new structure of an asymmetric rotor pump is proposed.The mathematical model of the asymmetric rotor is established,and the influence of the long-to-short radius ratio of the rotor pump on its performance is studied through CFD numerical simulation.The study indicates that the long-to-short radius ratio has a significantly affects on the fluid flow condition,flow pulsation characteristics,and rotor force within the pump cavity.With the increase of long-to-short radius ratio,the fluid flow velocity in the pump cavity gradually increases,the number of vortices initially decreases first and then increases,the radial force of main rotor gradually increases,when the long-to-short radius ratio is 1.52,the mean radial force increases by 26.9%compared with the ratio is 1.12,the volumetric efficiency increases gradually,the secondary pulsation of the export flow rate is effectively suppressed and the flow pulsation coefficient decreases first and then increases.When the long-to-short radius ratio is between 1.28~1.44,the volumetric efficiency of the pump is higher,the flow inside the pump ccavity is smoother,and the force on the rotor is better.This provides a theoretical basis for optimizing the design of rotor pumps by using an asymmetric structure and adjusting the long-to-short radius ratio.

关 键 词：不对称 转子泵 长短径比 数值模拟 

分 类 号：TH137[机械工程—机械制造及自动化] TE326[石油与天然气工程—油气田开发工程]