基于层流矩形间隙泄漏的叶片泵流量特性研究  

Research on Flow Characteristics of Vane Pump Based on Laminar Rectangular Clearance Leakage

作　　者：展鹏 魏列江[1] 李健伟 杨润雪 康祯 强彦[1] ZHAN Peng;WEI Lie-jiang;LI Jian-wei;YANG Run-xue;KANG Zhen;QIANG Yan(College of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,Gansu 730050;Chongqing Wangjiang Industry Co.,Ltd.,Chongqing 400071)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]重庆望江工业有限公司,重庆400071

出　　处：《液压与气动》2023年第3期60-67,共8页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51966010);甘肃省“创新之星”项目(2021CXZX-438)。

摘　　要：容积式液压泵中泄漏是不可避免的现象,其中双作用叶片泵泄漏途径较多,考虑泄漏的输出流量计算较为复杂。以双作用叶片泵为研究对象,在AMESim中建立其吸油口面积、压油口面积和封闭容腔体积的几何模型,并将叶片泵五种泄漏等效为“层流矩形”间隙泄漏,分析在考虑内外泄漏特性时双作用叶片泵进、出油口的流量脉动,在不同转速及负载压力下输出流量的变化规律。研究表明:叶片泵的输出流量及压力均是有多个“封闭容腔”体积的周期性变化形成的;采用层流矩形间隙泄漏模型的输出流量与实际测试流量接近,最大误差为4.28%,且空载时泵轴转矩随转速提升呈线性增大,加载后转矩随着转速的提升先减小后线性增大,不同负载下当转速超过3200 r/min时,容积效率下降。Leakage in positive displacement hydraulic pump is an inevitable phenomenon,in which there are many leakage ways of double acting vane pump,and the calculation of output flow considering leakage is more complex.This paper takes the double acting vane pump as the research object,establishes the geometric models of its oil suction port area,oil pressure port area and closed cavity volume in AMESim,and equates the five kinds of leakage of the vane pump as“laminar rectangular”gap leakage,analyzes the flow pulsation of the inlet and outlet ports of the double acting vane pump when considering the internal and external leakage characteristics,and the change law of the output flow at different speeds and load pressures.The research shows that the output flow and pressure of vane pump are formed by the periodic changes of the volume of multiple“closed cavities”.The output flow of the laminar rectangular gap leakage model is close to the actual test flow,and the maximum error is 4.28%.The pump shaft torque increases linearly with the increase of speed under no-load,and the torque decreases first and then increases linearly with the increase of speed after loading.Under different loads,when the speed exceeds 3200 r/min,the volumetric efficiency decreases.

关 键 词：双作用叶片泵 层流矩形间隙 泄漏流量 流量脉动 容积效率 

分 类 号：TH137[机械工程—机械制造及自动化]