摘要
以十一柱塞航空轴向泵转子系统为研究对象,基于转子动力学理论,构建转子系统的离散模型;然后根据流体连续定理及动量定理建立间隙环流运动的偏微分方程组;采用线性摄动法求解得到间隙环流激振力,并以矩阵的形式施加于干转子动力学方程上,组建湿转子系统动力学方程;在MATLAB软件中编写求解程序,计算干/湿转子的临界转速;最后搭建航空泵转子系统实验平台,完成干/湿转子系统临界转速对比实验研究工作。对比分析结果表明,间隙环流产生的动态流体激振力会影响转子系统的动力学特性,一定程度上会降低系统的临界转速,且随间隙比W的增大,降低趋势更显著。
In this paper,the rotor system of eleven-plunger Aviation Axial Pump is taken as the research object.Based on the rotor dynamics theory,the discrete model of the rotor system is constructed.Then,according to the fluid continuity theorem and the momentum theorem,the partial differential equations of the Gap Annular Flow motion are established.The Gap Annular Flow excitation force is solved by linear perturbation method,and the matrix is used to obtain the Gap Annular Flow excitation force.The form is applied to the dynamic equation of the dry rotor,and the dynamic equation of the wet rotor system is established.The solution program is compiled in MATLAB software to calculate the critical speed of the dry/wet rotor.Finally,the experimental platform of the aero-pump rotor system is built to complete the comparative experimental study of the critical speed of the dry/wet rotor system.The results show that the dynamic fluid exciting force produced by Gap Annular Flow will affect the dynamic characteristics of the rotor system,reduce the critical speed of the system to a certain extent,and with the increase of clearance ratio W,the decreasing trend is more significant.
作者
权凌霄
车世超
孟凯林
张英臣
QUAN Ling-xiao;CHE Shi-chao;MENG Kai-lin;ZHANG Ying-chen(Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control,Yanshan University, Qinhuangdao, Hebei 066004;School of Mechanical Engineering, Yanshan University, Qinhuangdao, Hebei 066004;Nanjing Engineering Institute of Aircraft Systems, Nanjing, Jiangsu 211106)
出处
《液压与气动》
北大核心
2020年第8期49-55,共7页
Chinese Hydraulics & Pneumatics
基金
国家自然科学基金(51775477)。
作者简介
权凌霄(1977—),男,陕西渭南人,教授,博士,主要从事液压系统振动机理及控制方面研究。
