一种高性能柔性导热带设计

Design of High-performance Flexible Thermal Strap

为了实现大功率活动焦面组件与散热器的高效热耦合及焦面组件与散热器的结构解耦,设计一种由主体段柔性带和刚性端子组成的高性能柔性导热带。主体段柔性导热带通过创新的回型双向传热路径方法完成高导热性及低刚度设计。刚性端子采用轻量化设计,使其具有轻质量及高效接触传热性能。柔性导热带能实现轻质量、高导热性、低刚度和良好的隔振效果。对柔性导热带的导热、隔振和刚度等性能进行测试,并将其应用到卫星的焦面电箱组件。结果表明:柔性导热带的质量较小(300 g),导热性能为0.53 W/℃,刚度小于15 N/m,可满足活动焦面组件散热设计的高导热、低刚度等性能要求。

In order to achieve high-efficiency thermal coupling of the high-power active focal plane components and structural decoupling of the focal plane components,a kind of high-performance flexible thermal strap is designed,which is composed of a main section flexible thermal strap and rigid terminals.The main section flexible thermal strap is designed with high thermal conductivity and low stiffness through the innovative two-way heat transfer path method.The rigid terminals adopt lightweight design,which makes it have light mass and efficient contact heat transfer.The flexible thermal strap can achieve light mass,high thermal conductivity performance,low stiffness and good vibration isolation effect.The thermal conductivity,vibration and stiffness of the flexible thermal strap are tested,and the flexible thermal strap is also applied in the focal plane component of satellite electricity box.The results show that the flexible thermal strap has a light mass of 300g,thermal conductivity performance of 0.53W/℃,and stiffness of less than 15N/m which can basically meet the requirements of high thermal conductivity and low stiffness of active focal plane component.