装甲车辆油气弹簧减振阀阻尼特性研究

Damping Characteristics Analysis of Hydro-Pneumatic Spring Damping Valve for Armored Vehicle

针对装甲车辆强冲击缓冲熄振的迫切需求,提出了一种新型减振阀结构。推导了压缩行程与拉伸行程阀系节流通道的流体串并联数学模型,验证了数学模型的合理性。运用该数学模型进一步开展了阀芯常通孔和螺旋弹簧预紧力等关键参数对阻尼力值及开阀点影响规律的仿真研究。仿真和试验结果表明:新型减振阀压缩行程阻尼力较原减振阀提升了近2倍,且拉伸行程开阀泄压效果明显;阀芯常通孔直径减小可增大减振阀的阻尼力并使阀芯的开阀点提前,但是当阀芯常通孔直径小于3 mm时,会导致减振阀开阀前阻尼力激增。

Aiming at the urgent need of strong shock buffering of armored vehicle,this paper presented a new type of damping valve.The mathematical model of series and parallel was derived to compression and stretching stroke,and the accuracy of the mathematical model was verified by experiments.Then,further research on the influence law of the key parameters of the damping valve on the damping force value and opening point,such as the diameter of normal through hole in the valve elemen and the preloading force of the spiral spring.There are two results by simulation and experiments,the damping force of the compression stroke of the new type damping valve is nearly twice higher than that of original one,and the effect of opening the valve for relieving pressure is obvious.Reducing the diameter of normal through hole in the valve elemen can increase the damping force,and make the opening point of the valve elemen ahead,but when the diameter is less than 3 mm,it will lead to the surge of the damping force before the opening of valve elemen.