转速对外啮合齿轮泵内部流动及脉动特性的影响  

Effect of Speed on Performance and Pulsation Characteristics of External Gear Pump

作　　者：司国雷 陈君辉 陈川 陶思佳 史广泰 SI Guo-lei;CHEN Jun-hui;CHEN Chuan;TAO Si-jia;SHI Guang-tai(Sichuan Aerospace Fenghuo Servo Control Technology Corporation,Chengdu,Sichuan 611130;School of Energy and Power Engineering,Xihua University,Chengdu,Sichuan 610039)

机构地区：[1]四川航天烽火伺服控制技术有限公司,四川成都611130 [2]西华大学能源与动力工程学院,四川成都610039

出　　处：《液压与气动》2023年第8期34-40,共7页Chinese Hydraulics & Pneumatics

基　　金：国家重点研发计划(2018YFB0905200);成都市重点研发支撑计划(2021-YF08-00012-GX)。

摘　　要：外啮合齿轮泵实际运行时,流道内易出现旋涡与脉动较大等现象,严重影响齿轮泵的正常运转。为了精确揭示不稳定流动对外啮合齿轮泵性能的影响,在不同转速工况下对外啮合齿轮泵进行三维非定常数值模拟分析。研究结果表明:转速的增加明显恶化了齿轮泵流道内的流态,排油区至出口段的高速区由平滑的光顺三角形条形区逐步演变为波浪形的不规则状。齿轮泵内的流量脉动系数远大于压力脉动系数,但转速对齿轮泵压力脉动的影响程度更剧烈,增加转速有利于减缓齿轮泵出口处的流量脉动程度。转速对齿轮泵内从动轮y轴方向上的影响最大,转速增大使得泵内齿轮所受径向力更分散,加剧了齿轮间隙处的泄漏流产生。研究结果可为外啮合齿轮泵的优化设计与稳定运行提供参考。In the actual operation of external gear pump,vortex and pulsation are easy to appear in the passage,which seriously affects the normal operation of gear pump.In order to accurately reveal the influence of unsteady flow on the performance of external gear pump,three-dimensional unsteady numerical simulation analysis of external gear pump under different speeds is carried out in this paper.The results show that the increase of speed significantly worsens the flow pattern in the gear pump passage,and the high speed zone from the oil discharge zone to the outlet section gradually changes from smooth triangular strip to wavy irregular shape.The flow pulsation coefficient in the gear pump is much greater than the pressure pulsation coefficient,but the speed has a more severe influence on the pressure pulsation of the gear pump.Increasing the speed is conducive to slowing down the flow pulsation degree at the outlet of the gear pump.The speed has the greatest influence on the y axis direction of the driven wheel in the gear pump.The increase of the speed makes the radial force received by the gear in the pump more dispersed,which intensifies the leakage flow at the gear clearance.The research results can provide reference for the optimal design and stable operation of external gear pump.

关 键 词：外啮合齿轮泵 转速 脉动特性 径向力 

分 类 号：TH137[机械工程—机械制造及自动化]