摘要
力矩马达的螺钉装配应力及其应力松弛会影响压力伺服阀零位及其前置级压力输出性能,为量化分析该影响规律,基于ABAQUS有限元软件对压力伺服阀力矩马达进行装配应力分析,研究力矩马达螺钉装配应力及不同位置螺钉装配应力松弛对压力伺服阀4个零位气隙值的影响。进一步建立压力伺服阀数学模型,在MATLAB/Simulink中搭建的压力伺服阀非线性集总参数仿真模型,以不同位置螺钉应力松弛引起的4个零位气隙变化值作为仿真输入,分析力矩马达装配螺钉应力松弛对伺服阀零位及前置级输出压差的影响。得到对称及非对称位置螺钉应力松弛对压力伺服阀零位及前置级输出压差的影响规律,为压力伺服阀中的螺钉装配工艺改进以及零漂故障诊断提供了理论支撑。
The screw assembly stress and stress relaxation of torque motor affect the pressure output performance of the pressure servo valve pre-stage and zero position.To quantify the influence law,the assembly stress analysis of pressure servo valve’s torque motor is carried out by using ABAQUS,and the influence of the screw assembly stress and assembly stress relaxation at different positions on the four zero air gap values is studied.The mathematical model of pressure servo valve is established,combined with the nonlinear lumped parameter model of pressure servo valve which is built in the MATLAB/Simulink,and four zero air gap values which are influenced by the screw stress relaxation at different positions are used as simulation input.The influence of assembly stress relaxation on the zero position and the output pressure differential of pressure servo valve’s nozzle cavity are analysed.The influence law of the screw stress relaxation in symmetrical and asymmetrical position on the zero position and the output pressure difference of pressure servo valve pre-stage are obtained.This approach provides a theoretical foundation for the screw assembly process improvement and zero position drift failure diagnosis in the pressure servo valve.
作者
江裕雷
朱玉川
葛声宏
周振锋
JIANG Yulei;ZHU Yuchuan;GE Shenghong;ZHOU Zhenfeng(National Key Laboratory of Science and Technology on Helicopter Transmission,Nanjing University of Aeronautics&Astronautics,Nanjing 210016,China;Aviation Key Laboratory of Science and Technology Aero Electromechanical System Integration,AVIC Nanjing Electrical Mechanical and Hydraulic Engineering Research Center,Nanjing 210061,China;AVIC Nanjing Servo Control System Co.,Ltd,Nanjing 210032,China)
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
2021年第3期350-358,共9页
Journal of Nanjing University of Aeronautics & Astronautics
基金
国家自然科学基金(51975275)资助项目。
关键词
电液压力伺服阀
螺钉
预紧力
气隙
零位
electrohydraulic pressure servo valve
screw
stress relaxation
air gap
zero position
