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冲压空气涡轮(RAT)泵将涡轮输出的机械能转换为液压能用以操控飞机舵面,其快速起动是飞机安全的最后保证。长时间处于低温大气环境,液压油的高黏性阻碍了液压泵的快速起动,将飞机主液压系统的高压油液引入RAT泵是解决该问题的有效方法。本文以RAT泵为研究对象,探究RAT泵的最小温控节流孔计算方法。首先,阐述RAT泵待机状态下通过温控节流孔保温原理,提出温控节流孔的孔径计算方法;其次,建立RAT泵热力学模型,推导温控节流孔的孔径计算公式;然后,基于MATLAB平台搭建RAT泵温控系统热力学模型;最后,通过仿真计算,由仿真结果验证本文所提出的温控节流孔计算方法的正确性,且节能效果显著。
The ram air turbine (RAT) pump converts the mechanical energy output by the turbine to hydraulic power to manipulate the aircraft’s rudder surface, and its quick start is the final guarantee of aircraft safety. Long time in the low temperature atmospheric environment, the high viscosity of the hydraulic oil hinders the quick start of the hydraulic pump. Introducing the high pressure hydraulic fluid of the main hydraulic system of the aircraft into the RAT pump is an effective way to solve this problem. In this paper, RAT pump as the research object, to explore RAT pump minimum temperature control orifice calculation method. First of all, the principle of temperature-controlled orifice insulation is put forward when the RAT pump is in stand-by state. The calculation method of aperture of temperature-controlled orifice is put forward. Secondly, the thermodynamic model of RAT pump is established and the aperture calculation formula of temperature- MATLAB platform to build RAT pump temperature control system thermodynamic model; Finally, through the simulation calculation, the simulation results verify the accuracy of the temperature control throttling method proposed in this paper, and the energy-saving effect is remarkable.