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阴极热子组件是星载行波管的核心部件,其性能的好坏直接影响到整管的性能和寿命。由于星载行波管工作环境特殊,要求在保证阴极正常工作的前提下,尽可能地降低阴极热子组件的加热功率以提高阴极热子组件可靠性、延长阴极热子组件寿命,同时阴极热子组件必须具有良好的抗振性能。本文利用ANSYS有限元软件对某星载脉冲行波管栅控电子枪阴极热子组件进行了热学和结构动力学性能分析和研究,通过优化阴极热子组件支撑结构和尺寸,降低了它的加热功率,并进行了热学实验验证;同时为了保证其力学可靠性,分析了阴极热子组件在随机振动条件下的力学性能。研究结果表明,新阴极热子组件结构加热功率由10.50 W降低至8.21 W,轴向尺寸缩短了45.4%,满足某星载行波管小型化的需求,结构同时符合抗机械振动性能的要求。
The cathode thermal subassembly is the core component of the spaceborne traveling wave tube, and its performance directly affects the performance and life of the whole pipe. Due to the special working environment of the spaceborne TWT, it is required to reduce the heating power of the cathode thermal subassembly as much as possible to improve the reliability of the cathode thermal subassembly and extend the life of the cathode thermal subassembly, while ensuring the normal cathode operation, while the cathode thermal Subassemblies must have good anti-vibration properties. In this paper, ANSYS finite element software was used to analyze the thermal and structural dynamics of a CPGG GSP electron gun. By optimizing the support structure and size of the cathode thermal subassembly, the heating power was reduced , And verified by thermal experiment. Meanwhile, in order to ensure its mechanical reliability, the mechanical properties of cathode thermal subassembly under random vibration were analyzed. The results show that the heating power of the new cathode subassembly decreases from 10.50 W to 8.21 W, and the axial dimension is shortened by 45.4%, which meets the miniaturization requirements of a spacecraft traveling wave tube. The structure meets the requirements of anti-mechanical vibration performance at the same time.