航天超低黏度齿轮微泵困油下的流量脉动研究  

Flow Pulsation Under Trapped-oil of Aerospace Gear Micro-pump with Ultra-low Viscosity Medium

作　　者：李玉龙 赵宏顺[1] 宋安然 刘萍[1] 范钧[1] LI Yu-long;ZHAO Hong-shun;SONG An-ran;LIU Ping;FAN Jun(School of Mechanical and Electrical Engineering, Suqian College, Suqian, Jiangsu 223800)

机构地区：[1]宿迁学院机电工程学院,江苏宿迁223800

出　　处：《液压与气动》2020年第10期64-68,共5页Chinese Hydraulics & Pneumatics

基　　金：宿迁市“千名领军人才集聚计划”项目(2019JJ090);宿迁市科技计划项目(K201924);宿迁学院高层次人才引进项目(2018GR05);北京卫星制造厂资助项目(20804)。

摘　　要：为实现航天超低黏度齿轮微泵困油下无级调速的高使役性能,依序从齿轮微泵的困油啮合过程、瞬时流量及卸荷流量的3个方面,逐步建立出对应的流量均值和脉动系数式,并就困油压力和齿形参数对流量均值和脉动系数的影响,进行实例分析。结果表明:双卸荷槽对称布置下,单纯通过增加卸荷面积来缓解困油压力,对流量脉动的品质几乎无影响;轴向缝隙是影响困油压力和流量脉动的最大因素;轴向的阶梯缝隙能满足困油卸荷与降低轴向泄漏的不同需求。齿形参数的影响各异,尤其小模数与大齿数的组合能实现均值提高与脉动改善的双重目的。研究成果为高品质齿轮微泵的进一步研究与开发,提供一定的理论依据。In order to realize high use performance of step-less speed regulation under trapped-oil pressure in aerospace gear micro-pump with ultra-low viscosity medium.In order from trapped-oil process and meshing process of the micro-pump,the formulas for calculating mean flow and pulsation coefficient were derived step by step;finally,the example effect of trapped-oil pressure and tooth shape parameters on mean flow and pulsation coefficient were analyzed.All results showed that simply increasing relief area to relieve trapped-oil pressure had little effect on mean flow and pulsation coefficient under two symmetrical relief grooves;axial gap was the bigger factor affecting trapped-oil pressure and flow pulsation;different axial step gaps could be used to meet different requirements of relieved trapped-oil pressure and reduced axial leakage;tooth shape parameters had different effects on mean flow and pulsation coefficient,in particular,combination of small modulus and large tooth number could achieve dual purpose of relatively large flow mean and relatively small pulsation coefficient.All research results can provide some theoretical basis for further high quality research and development of aerospace gear micro-pump.

关 键 词：航天齿轮微泵 超低黏度介质 困油压力 流量均值 脉动系数 轴向缝隙 

分 类 号：TH137.3[机械工程—机械制造及自动化] TH325