履带车辆油气弹簧生热机理和热模型研究  

Research on the Heat Generation Mechanism and Thermodynamic Model of Hydro-pneumatic Spring for Tracked Vehicles

作　　者：聂维 何洪文[1] 孙宇[3] 万义强 NIE Wei;HE Hongwen;SUN Yu;WAN Yiqiang(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;Propulsion System Technologies Department,China North Vehicle Research Institute,Beijing 100072,China;Technology Research Institute,Beijing North Vehicle Group Corporation,Beijing 100071,China)

机构地区：[1]北京理工大学机械与车辆工程学院,北京100081 [2]中国北方车辆研究所推进系统技术部,北京100072 [3]北京北方车辆集团有限公司工艺研究院,北京100071

出　　处：《兵工学报》2024年第10期3555-3563,共9页Acta Armamentarii

摘　　要：为研究油气弹簧工作过程中的生热机理,建立油气弹簧参数化热模型。采集试验数据对油气弹簧阻尼示功特性进行数值拟合,得到活塞运动速度-阻尼力关系的数学表达式。对油气弹簧的传热路径和换热特点分析,建立油气弹簧热阻网络模型,计算得到工作过程中油气弹簧2种工作介质的温度变化特性。设计试验对油气弹簧的热模型计算结果进行验证。试验结果表明:阻尼力做功是油气弹簧温度升高的主要热量来源,油液温度比气体温度上升更快、平衡温度更高,该模型可以准确地计算出油气弹簧不同工作介质的温升情况,为油气弹簧热-机耦合动力学研究提供了参考。A parametric thermodynamic model for the hydro-pneumatic spring of tracked vehicle is established to explore the mechanism of heat generation of hydro-pneumatic spring during working process.The damping indicator characteristics of hydro-pneumatic spring are numerically fitted through test data acquisition,and a mathematical expression of piston velocity-damping force is obtained by data fitting.Based on the analysis of the heat transfer path and characteristics of hydro-pneumatic spring,a thermal resistance network model of hydro-pneumatic spring is established,and the temperature changes of two working medias of hydro-pneumatic spring are calculated.The calculated results of thermodynamic model for the hydro-pneumatic spring are verified by test.The results show that the work done by the damping force is the main heat source for the temperature rise of hydro-pneumatic spring.Under the same working condition,the oil temperature rises faster than the gas temperature and the oil equilibrium temperature is higher.The thermodynamic model can accurately calculate the temperature rise of hydro-pneumatic spring in different working medias,and provides a reference for studying the thermo-mechanical coupling dynamics of hydro-pneumatic spring.

关 键 词：生热机理 能量交换 热阻网络 温度分布 平衡温度 

分 类 号：TB123[理学—工程力学]