浮动断接器作为在轨补加接头,是两航天器液路和气路的连通和断开的接口部件,可以实现两航天器之间的燃料、氧化剂的传输。浮动断接器一般安装在航天器的头部或尾部,外热流条件严酷,为保证其合适的工作温度,有效的热控制措施非常关键。以推进剂补加用浮动断接器作为研究对象,建立了浮动断接器物理模型,分析了其外部极端热环境,采用传热学的辐射以及热传导理论,形成热控设计方案。根据边界温度以及宇宙空间的外热流极端条件,应用IDEAS/TMG热分析软件进行了不同工况下的热分析仿真计算,在此基础上对热控方案进行了优化设计。分析结果表明:采用主动热控和被动热控相结合的热控措施可以满足浮动断接器正常工作的温度指标要求,热控设计合理可行。 Floating disconnector, as an on-orbit supplementary connector, is an interface component that connects and disconnects the liquid and gas paths of two spacecraft and can realize the transmission of fuel and oxidant between the two spacecraft. Floating disconnectors are generally installed in the spacecraft’s head or tail, external heat flow conditions are harsh, in order to ensure its proper operating temperature, effective thermal control measures is critical. With the addition of propellants using the floating disconnector as the research object, the physical model of the floating disconnector was established, the external extreme thermal environment was analyzed, and the heat control design was made by using heat transfer radiation and heat conduction theory. According to the boundary temperature and extreme conditions of external heat flow in space, the thermal analysis simulation under different operating conditions was carried out with IDEAS / TMG thermal analysis software. Based on this, the thermal control scheme was optimized. The analysis results show that the thermal control method which combines the active thermal control and the passive thermal control can meet the requirements of the temperature index for the normal operation of the floating disconnector. The thermal control design is reasonable and feasible.