复杂活塞轮廓型线对约束膜式空气弹簧刚度的影响及分析  

Influence and analysis of complex piston contour profile on stiffness of constrained membrane air spring

作　　者：朱好 葛正浩[1] 李杰[1] 刘家成 王俊 ZHU Hao;GE Zhenghao;LI Jie;LIU Jiacheng;WANG Jun(School of Mechanical and Electrical Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China)

机构地区：[1]陕西科技大学机电工程学院,西安710021

出　　处：《现代制造工程》2023年第9期77-83,17,共8页Modern Manufacturing Engineering

摘　　要：空气弹簧作为弹性元件,与传统螺旋弹簧和钢板弹簧相比具有更好的隔振、降噪特性。空气弹簧刚度是空气弹簧的主要性能参数,其主要影响因素是有效面积及其变化率,而空气弹簧的活塞轮廓外径及其变化趋势对有效面积及其变化率的影响显著;因此,活塞轮廓型线是影响空气弹簧性能的主要因素之一。建立了关于约束膜式空气弹簧刚度特性的数学模型,分析活塞轮廓型线对约束膜式空气弹簧刚度的影响。同时,基于气囊卷耳最低点处(窝折点)所在圆的直径即为有效直径这一理论,提出了一种对于任意复杂活塞轮廓曲线,表述空气弹簧位移在任意时刻、任意变化规律情况下对应活塞作用高度及其变化的方法。As an elastic element,air springs have better vibration isolation and noise reduction characteristics compared to traditional coil springs and leaf springs.Stiffness of air spring is the main performance parameter of an air spring,and its main influencing factor is the effective area and its rate of change.The piston contour outer diameter of air springs and its trend of change have a significant impact on the effective area and its rate of change.Therefore,piston contour profile is one of the main factors affecting performance of the air springs.A mathematical model for the stiffness characteristics of the constrained membrane air spring was established and the effect of piston contour profile on the stiffness of the constrained membrane air spring was analyzed.At the same time,based on the theory that the diameter of the circle at the lowest point(nest fold point)of the air bag lug is the effective diameter,a method was proposed to express the piston action height and its change corresponding to the air spring displacement at any time and under any change rule for any complex piston contour curve.

关 键 词：空气弹簧 活塞轮廓曲线 窝折点 有效直径 有效面积 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3