基于键合图法的履带车油气弹簧阻尼阀特性分析

To optimize the damping characteristics of vehicle suspension, a parametric model for the damping characteristics of damping valve in hydro-pneumatic suspension is established based on the bonding diagram method. According to the dfferent working modes of damping valve before and after opening and closing during compression stroke and during recovery stroke, the throttling form of damping valve under different working conditions is analyzed, and a damping characteristic model for the compression and recovery strokes of damping valve are established by combining the knowledge of fluid dynamics. The influences of structural parameters on the compression stroke, recovery stroke and flow rate of valve opening point are analyzed by simulation. A flow test bench is designed to verify the simulation results of damping valve characteristics. The results show that the characteristic model of damping valve established by the bonding diagram method can accurately calculate the characteristics of damping valve, the diameters of orifices 2 and 3 in the spool are decreased to reduce the opening speed of damping valve, the diameters of orifices 1 and 4 are adjusted to regulate the damping force accordingly without affecting the opening speed, and the diameter of orifice 6 only affects the damping force on the recovery stroke.