摘要
为了满足重型越野车辆对大行程弹性元件的要求,创新设计了一种双气室油气弹簧。根据结构和工作特性,建立了两种工作状态下的油气弹簧数学模型,并分析了其刚度特性。加工油气弹簧样件,进行台架试验,获得了不同频率下的油气弹簧作用力和位移数据。分离弹簧作用力中静摩擦力、阻尼力和弹性力。利用弹性力和位移数据,通过曲线拟合方式,识别油气弹簧工作气体不同工况下的多变指数。设计的双气室油气弹簧结构、油气弹簧理论模型,对油气弹簧在大行程越野车上的应用提供了支撑。
In order to meet the requirements of heavy off-road vehicles for long-stroke elastic elements,a new type of double-chamber hydro-pneumatic spring is innovatively designed.According to the structure and working characteristics,the mathematical models of the spring under two working conditions are established,and its stiffness characteristics are analyzed.The force and displacement data of the spring at different frequencies are obtained by rig test.The static friction,damping and elastic force of the spring are separated.Based on the data of elastic force and displacement,the polytropic exponent of hydro-pneumatic spring under different working conditions is identified by curve fitting.The structure and theoretical model of double-chamber hydro-pneumatic spring provide support for the application of hydro-pneumatic spring in long-stroke off-road vehicle.
作者
杜志朋
林恕锋
董明明
DU Zhi-peng;LIN Shu-feng;DONG Ming-ming(Xinxiang Xinhua Hydraulic Machinery Co. , Ltd. , Xinxiang, Henan 453000;School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081)
出处
《液压与气动》
北大核心
2021年第10期69-75,共7页
Chinese Hydraulics & Pneumatics
基金
国家自然科学基金青年科学基金(51005018)。
关键词
重型越野车辆
双气室
油气弹簧
气体多变指数
heavy off-road special vehicle
double-chamber
hydro-pneumatic spring
polytropic exponent
