一种民用飞机液压系统自增压油箱容积计算方法

A method for self-pressurized civil aircraft hydraulic reservoir volume calculation

选择合适的油箱容积是保障液压系统正常工作的必要前提,为了能够合理计算民用飞机自增压油箱的容积,基于SAE AS5586飞机液压系统油箱通用设计要求,介绍并分析飞机液压系统工作中作动筒、蓄压器以及油液物理特性等所产生的变化容积的计算方法,提出一套循序渐进的油箱容积计算方法以求得油箱设计所需的各类容积值;以某型飞机液压系统油箱容积计算为例,通过对极冷极热天气条件下各飞行阶段的油量分析,并和机上油箱油量记录曲线对比,验证提出的容积计算方法的有效性。结果表明:该型飞机液压系统油箱容积在全飞行阶段均能满足要求,本文所提油箱容积计算方法可行,可用于类似液压系统油箱容积计算。

Selecting appropriate reservoir volume is a necessary premise to ensure the normal operation of the hydraulic system.In order to provide a reference for the reasonable calculation of the self-pressurized hydraulic reservoir volume of civil aircraft,based on the general design requirements of SAE AS5586 aircraft hydraulic system reservoir,the calculation methods for variable volume produced by actuator,hydraulic accumulator and physical properties of oil are introduced and analyzed in this paper.A set of step by step reservoir volume calculation methods are proposed to get the design value of the reservoir.Taking an aircraft hydraulic reservoir volume calculation as an example,the calculation method of each variable volume in the system is deduced.The results show that the reservoir of the hydraulic system of this type of aircraft can meet the requirements in each flight phase.