采用汇流环技术可在一定程度上解决电磁发射装置随动时大规模同轴电缆运动引起的范围受限等工程设计难题。本文建立汇流环接触界面电磁斥力和接触电阻数学模型，在实验室环境下开展百千安级脉冲电流传导实验。研究表明，百千安级脉冲大电流工况下，接触压力不小于Fa时，电流传导界面接触特征稳定，脉冲大电流传导密度最大达到1348.8 A/cm2，接触电阻不大于16.5 mΩ。在满足传导界面接触电阻要求条件下，需要优先考虑降低单个电刷面积上的电流幅值，降低电磁斥力，更有利于工程化应用。研究结果可为电磁发射装置汇流环设计提供一种技术途径。
The application of the slip ring technology can, to a certain extent, solve the engineering design challenges such as the limitation of the movement range caused by the motion of a large number of coaxial cables when the electromagnetic launching device is in a follow-up motion. In this paper, mathematical models of the electromagnetic repulsive force and contact resistance at the contact interface of the slip ring are established, and an experimental study on the conduction of pulse current at the hundred-kiloampere level is carried out in a laboratory environment. The research shows that: under the working condition of a large pulse current at the hundred-kiloampere level, when the contact pressure is not less than Fa, the contact characteristics of the current conduction interface are stable. The maximum conduction density of the large pulse current reaches 1348.8 A/cm2, and the contact resistance is not greater than 16.5 mΩ. Under the condition of meeting the contact resistance requirements of the conduction interface, it is necessary to give priority to reducing the current amplitude on the area of a single brush to lower the electromagnetic repulsive force, which is more conducive to engineering application. The research results can provide a technical approach for the design of the slip ring of the electromagnetic launching device.
2025,47(22): 16-21 收稿日期：2025-3-7
DOI：10.3404/j.issn.1672-7649.2025.22.003
分类号：U674.7；TM506
基金项目：国家自然科学基金资助项目（92266203）
作者简介：宋海通（1990 – ），男，硕士，工程师，研究方向为机电工程
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