某液冷线阵冷板设计与制造技术

Design and Manufacturing Technology of Cold Plate in an Antenna Linear Array

液冷冷板作为一种高效的热交换装置,保障着雷达设备中T/R组件的长期稳定运行。随着T/R组件热流密度的不断增大,用传统工艺制作的圆截面流道线阵冷板已不能满足其散热需求,而小/微通道冷板因其显著的换热能力,正受到越来越多的关注。文中以某有源相控阵雷达线阵冷板为研究对象,比较了传统圆截面流道冷板、小通道矩形流道冷板和微通道矩形流道冷板的散热能力和加工成本,并进行了热学仿真设计,结果表明小通道矩形流道冷板为最合适的冷板结构形式。然后对氮气保护钎焊与扩散焊进行了比较,结果表明氮气保护钎焊为最合适的焊接工艺形式。最后通过多种焊后检验验证了焊接工艺的可靠性。

As an efficient heat exchanger,the cold plate ensures the long-term stable operation of the T/R module of radar.With increase of heat flux of the T/R module,the cold plate manufactured with traditional manufacturing techniques can’t meet the high heat dissipation requirement,while the micro/mini-channel cold plate gets more and more attention because of its good heat transfer property.In this paper,taking the cold plate in an active phased array radar as research object,the cooling capacity and manufacturing cost of the micro/mini-channel cold plates and traditional cold plate with circular channel are compared and thermal simulation design is carried out.The results show that the mini-channel cold plate with rectangular section is the most suitable one.Then the comparison result shows that the brazing in nitrogen atmosphere is more suitable than diffusion welding as the welding method of the mini-channel cold plate.At last,the feasibility of the welding procedure is verified by various inspection after welding.