半主动油气弹簧热平衡及其影响因素分析

Heat balance and influence factor of semi-active hydro-pneumatic spring

按照车辆半主动悬挂的工作原理给出了带有控制阀的系统结构简图。针对减振装置工作时的能量转换特性及其对密封件可靠性的影响,分析了半主动油气弹簧的生热机理,同时开展了热平衡研究。通过合理的假设并运用传热学和工程热力学相关知识分别以油液和氮气为研究对象推导了综合热量传递表达式。根据热力学第一定律构建了半主动油气弹簧的热力学模型。给出了系统结构参数并编程分析了相关因素对油液温升的影响规律,为油气弹簧的设计提供了参考。

The structure of the vehicle semi-active suspension with the control valve was presented according to its operation principle. The heat generation mechanism and the heat balance of the semi-active hydropneumatic spring were analyzed from the energy transform character of the working shock-absorber and its influence on the seal reliability. The equation of integrated heat transfer were derived with the object of oil and nitrogen respectively based on proper assumption and the knowledge of heat transfer and engineering thermodynamics. A thermodynamic model was built for the semi-active hydro-pneumatic spring based on the first law of thermodynamics. The structure parameters of the system were given and the influences of relevant factors on the temperature rise were analyzed by programing. The conclusions provide a reference for the design of the hydro-pneumatic spring.