摘要
为了降低辐冷空间行波管收集极温度,需要保证热辐射器与行波管收集极间有良好的热接触,尽量减小接触热阻。在设计上,热辐射器与收集极间可使用机械固定与焊接两种连接方式。本文分别介绍了这两种连接方式,讨论了两种连接方式的工艺途径以及工艺特点。从工艺特点方面比较,机械固定方式具有较明显的优越性。为进一步比较两种连接方式传导散热能力,设计并开展了热平衡试验,测量了两种连接方式的接触热阻。试验结果显示,焊接方式的接触热阻比机械固定结构小0.133K/W,具有更好的热传导能力。文中介绍的两种连接方式及相关分析与试验结论为辐冷空间行波管热辐射器与收集极连接方式设计提供了一定参考。本文创新点在于设计并实现了热辐射器与收集极两种连接方式,并首次为此设计进行了热平衡试验,比较了两种连接方式的传导散热能力。
In order to reduce the temperature of a radiating cooled space traveling wave tube (STWT) collector, a good thermal contact should be established between the heat radiator and the collector, and the thermal resistance should be minimized. In the design, the heat radiator and the collector can be connected by mechanical fixation or welding. This paper introduces the two connection modes, and discusses their technological approaches and characteristics. In terms of technological characteristics, the mechanical fixation method has obvious advantages. In order to further compare the heat dissipation capacity of the two connections, we designed and carried out a heat balance test to measure the contact thermal resistance of the two connections. The experimental results show that the contact thermal resistance of the welding structure is 0.133 K/W, which is smaller than that of the mechanical fixed structure, and it has better heat conduction ability. The two connection methods and their correlation analysis and experimental results provide references for the design of connection mode between radiating cooled STWT heat radiator and collector. The innovation of this research lies in the design and realization of the two connection modes between the heat radiator and the collector, and the first design and conduct of heat balance test for comparing the heat dissipation capacity of the two connections.
作者
陈平
周斌
张家强
黄微波
冯西贤
刘逸群
崔庆新
CHEN Ping;ZHOU Bin;ZHANG Jia-qiang;HUANG Wei-bo;FENG Xi-xian;LIU Yi-qun;CUI Qing-xin(Nanjing Sanle Group Co., Ltd., Nanjing 211800, China;Xi an Institute of Space Radio Technology, Xi an 710100, China;Beijing Satellite Manufacturing Plant, Beijing 100089, China)
出处
《真空电子技术》
2019年第2期61-64,共4页
Vacuum Electronics
关键词
辐冷型空间行波管
热平衡试验
热辐射器
接触热阻
Radiating cooled STWT
Heat balance test
Heat radiator
Contact thermal resistance
