闭式斜盘轴向柱塞变量泵配流副空蚀现象分析  

Analysis of cavitation phenomenon on the surface of distributor of closed swash plate axial piston variable pump

作　　者：王建森[1,2] 何鑫龙 杨威 曹伟栋 姚亦铭 王峥嵘 WANG Jian-sen;HE Xin-long;YANG Wei;CAO Wei-dong;YAO Yi-ming;WANG Zheng-rong(School of Energy and Power Engineering, Lanzhou Univ. of Tech., Lanzhou 730050;Hydraulic and Pneumatic Engineering Technology Research Center of Gansu Province, Lanzhou 730050)

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：《兰州理工大学学报》2022年第1期59-64,共6页Journal of Lanzhou University of Technology

基　　金：甘肃省科技计划资助(17JR5RA120)。

摘　　要：以具有正开口双侧减振槽结构配流盘的闭式斜盘轴向柱塞变量泵为研究对象,考虑介质可压缩性,采用均质多相传输方程、标准k-ε湍流模型和全空化模型,研究了柱塞泵配流副表面空化流场时空动态演化过程,并与缸体配流表面空蚀破坏实验结果进行了比对.结果表明,缸体间隔区处气蚀破坏位置、破坏面积与配流过渡过程配流副表面空化发生的位置、空化持续时间及空化剧烈程度等因素高度关联.配流盘正开口引起柱塞腔至吸油腔渐扩减振槽处高压差强剪切窜油空化流动是造成缸体配流面空蚀破坏的主要原因,缸体间隔区前缘和后缘表面的气蚀破坏分别与柱塞腔升压和卸压过渡过程相关.Taking the closed swash plate axial piston variable displacement pump with a port plate with positive opening and double damping grooves as the research object,the homogeneous multiphase transport equation,standard k-εturbulence model and full cavitation model are used to study the time-space dynamic evolution process of cavitation flow field on the surface of port pair of piston pump considering the compressibility of medium.It is found that the location and extent of cavitation erosion on the surface of cylinder block are highly correlated with the location,duration and severity of cavitation on the surface of valve pair during the transition process of valve distribution.The main cause of cavitation damage on the valve surface of the cylinder block is the high pressure difference between the piston cavity and the oil suction cavity caused by the positive opening of the valve plate.The cavitation damage on the leading edge and the trailing edge of the cylinder block spacer is respectively related to the transient process of pressure rise and pressure relief of the piston cavity.

关 键 词：闭式斜盘柱塞泵 正开口配流 减振槽 空化空蚀 数值分析 

分 类 号：TH137[机械工程—机械制造及自动化]