特种车辆驾驶室减振器节流阀片开度及阻尼特性研究

摘要

For cab air suspension of special vehicles,the opening size of the throttle slice is a key issue.A mechanical model of throttle slice is established based on the integrated structure of air spring and damper for a special vehicle cab.The deformation analytic formula of the damping slice is deduced using the principle of elastic mechanics,and is validated through a practical example.The relationship among the slice opening size and the valve parameters is analyzed using the deformation analytic formula.Finally,a piecewise linear simulation model of damper for cab air suspension is built and verified through bench test,and the relative deviations of simulated and experimental damping forces are all less than 6.19％.The results show that the piecewise linear simulation model can truly reproduce the dynamic damping characteristics.%特种车辆驾驶室减振器的阻尼特性是由阀系参数决定的,准确地求解节流阀片在阀口位置的变形是通过仿真准确获取减振器阻尼特性的关键.以特种车辆驾驶室减振器为研究对象,建立其节流阀片在区间线性均布压力下的力学模型及变形解析式,并进行了正确性验证.分析阀片开度随阀系结构参数变化的规律,在此基础上建立驾驶室减振器阻尼分段特性仿真模型,并通过仿真实例与试验进行了对比验证.结果表明,不同速度下阻尼力仿真结果与试验结果相对偏差均在6.19％以内,说明所建立的驾驶室减振器阻尼分段特性仿真模型可较为真实地复现减振器的动态阻尼特性.