高频激振转阀轴向稳态液动力研究

Research on Axial Steady-state Flow Force of High-frequency Vibration Rotary Valve

高频激振转阀通过阀芯转动控制阀口的打开和关闭,其开度变化及油流换向使油液的轴向动量发生改变,进而产生轴向液动力干扰激振转阀的稳定运行。对高频激振转阀进行理论分析,建立阀芯轴向受力的数学模型和轴向稳态液动力方程;通过Fluent软件,对激振转阀流场进行CFD仿真分析,研究压力和轴向开度对轴向稳态液动力变化规律的影响;最后设计并搭建轴向稳态液动力测量实验台进行实验验证。结果表明:轴向稳态液动力随激振转阀转角变化而规律变化,且入口节流产生的稳态液动力大于出口节流时的稳态液动力。

The high-frequency vibration rotary valve controls the opening and closing of the valve port by rotating the spool.The change of the opening degree and the reversal of the oil flow cause a change in the axial momentum of the oil,which generates axial flow forces that interfere with the stable operation of the vibration rotary valve.Based on the theoretical analysis of the high-frequency vibration rotary valve,the axial force mathematical model and the axial steady-state flow force equation of the spool are established.Through the simulation of Fluent,the flow field of the vibration rotary valve is analyzed by CFD,and the influence of pressure and axial opening on the axial steady-state flow variation is studied.Finally,the axial steady-state flow measurement platform is designed and built for experimental verification.The experimental results show that the axial steady-state flow force changes regularly with the change of the rotation angle of the vibration rotary valve,and the axial steady-state flow force generated by the inlet throttling is greater than that generated by the outlet throttling.