一体化电动液压动力单元内气泡分布及气泡分离方法的研究  

Bubble Distribution and Bubble Separation Methods in Integrated Electro-Hydraulic Power Unit

作　　者：孙东宁[1,2] 刘新强[1,2] 王金林[1,2] 张继铭[1,2] 

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]甘肃省液压气动工程技术研究中心,甘肃兰州730050

出　　处：《甘肃科学学报》2015年第2期88-92,共5页Journal of Gansu Sciences

基　　金：国家自然科学基金项目(51075194);甘肃省科技支撑项目(1011GKCA041)

摘　　要：针对一体化电动液压动力单元内气泡流动现象进行气泡流动观测试验,利用Fluent中的欧拉—欧拉多相流模型对其进行气液两相流三维数值计算。基于气泡流场解析结果和气液两相流的流动特性,提出了两种实现气泡快速分离的方案。研究发现:气泡在液压电机泵壳体的外表面及上端吸油口腔体的内表面分布较多,气泡在主轴的外表面汇集。在油液流入油箱前,通过改变油液的流态形成旋转流或紊态流、延长流动路径,可以实现气泡从油液中快速分离的目的。A flow observation test of bubble flow was conducted to research bubble flow in the integrated Electro-hydraulic power unit.The three-dimensional flow field in the hydraulic reservoir was calculated by using the Eulerian-Eulerian Model of the software Fluent.Based on the results obtained by the bubble flow field simulation and flow characteristics of the gas-liquid two-phase flow,two methods to achieve the rapid separation of bubbles were proposed.The results showed that bubbles are more on the external surface of the hydraulic motor pump shell and the internal surface of the upper inlet port,and air bubbles gathered in the external surface of the main shaft.The rapid separation of bubbles from oil was achieved by altering the flow pattern,generating swirl flow or turbulent flow and prolonging the flow path before oil flowed into the hydraulic reservoir.

关 键 词：一体化电动液压动力单元 气泡流 分离方法 Fluent仿真 

分 类 号：TH137[机械工程—机械制造及自动化] TM343[电气工程—电机]