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螺旋线行波管具有宽频带、高效率、高增益的优良特性,在卫星通信及电子对抗中得到了广泛的应用。螺旋线行波管的慢波结构由螺旋线、夹持杆、管壳及周期永磁系统组成。通常,螺旋线通过夹持杆过盈装配在管壳中,在装配时,由于元件加工误差的随机性,若没有准确的理论指导,很可能造成管壳因过量挤压而产生屈曲形变。本文利用ANSYS有限元软件对某星载螺旋线行波管螺旋线-夹持杆-管壳过盈装配技术开展了研究,通过理论分析和模拟计算,给出了该螺旋线行波管在螺旋线-夹持杆-管壳冷挤压装配时的挤压安全范围及成功概率,以指导实际工程操作。此外,又讨论了管壳长度和厚度对安全装配的影响,为相近型号的螺旋线行波管装配操作提供了参考。
Spiral TWT has excellent characteristics of wideband, high efficiency and high gain. It has been widely used in satellite communications and electronic warfare. The slow-wave structure of a helical traveling wave tube consists of a helix, a holding rod, a shell and a periodic permanent magnet system. Usually, the helix is assembled in the package by the interference of the clamp rod. Due to the randomness of component machining errors, the assembly may cause buckling deformation due to over-squeezing if there is no accurate theoretical guidance. In this paper, ANSYS finite element software for a spaceborne helical traveling wave tube helix - holding rod - shell interference assembly technology was studied by theoretical analysis and simulation calculations, given the helical traveling wave tube in the spiral Line - clamping rod - tube shell cold extrusion assembly safety margin and the probability of success, to guide the actual operation of the project. In addition, the influence of the length and thickness of the shell on the safety assembly is discussed, which provides a reference for the operation of the similar type of helical traveling wave tube assembly.