变转速液压电机泵中孔板离心泵的增压作用  

Charging effect of port-plate centrifugal pump in electric motor-pump under variable speed

作　　者：冀宏[1] 张继铭[1] 王金林[1] 王文璐[1] 孙东宁[1] 

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

出　　处：《兰州理工大学学报》2014年第1期37-40,共4页Journal of Lanzhou University of Technology

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

摘　　要：液压电机泵主要是由电动机、孔板离心泵及主泵(高压叶片泵)集成为一体的新型液压动力单元,在主泵吸油腔前端设置孔板离心泵是利用其增压作用提高主泵进口压力,保证主泵充分吸油.建立液压电机泵中孔板离心泵的内部流场模型,进行不同转速条件下的流场仿真计算,分析转速对液压电机泵中孔板离心泵增压作用的影响.研究表明:孔板离心泵出口总压随着转速的上升不断增大,孔板离心泵出口(主泵吸油腔进口)总压最大值可以表征孔板离心泵对主泵的补油效果,当转速高于1 000r/min以后,总压最大值快速升高并呈线性增加趋势,当转速上升至2 000r/min时,总压最大值相对增大15.5倍.Electric motor-pump is a novel integrated hydraulic power unit which is mainly composed of an electric motor,a port-plate centrifugal pump and a main pump （a high-pressure vane pump）.The portplate centrifugal pump is set in the front of oil suction cavity of the main pump to improve the pressure of the inlet of the main pump by utilizing the charging effect and ensure sufficient oil suction of the main pump.The internal flow field model of the port-plate centrifugal pump in the electric motor-pump is set up,the flow field under variable speed is conducted and the comparative analysis on port-plate centrifugal pump charging effect is simulated.The results shows that the total pressure on the outlet port of portplate centrifugal pump （the inlet port of the main pump） enhances continually with the increase of rotational speed and its maximum valve characterizes the oil compensation effect.The maximum value of the total pressure increases rapidly and linearly when the rotational speed is higher than 1 000 r/min and it relatively increases by 15.5 times when the rotational speed reached 2 000 r/min.

关 键 词：液压电机泵 孔板离心泵 变转速 增压作用 

分 类 号：TH137[机械工程—机械制造及自动化]