| 斯特林制冷机直线电机的磁钢固定实验与研究 |
| 投稿时间：2024-10-30 修订日期：2024-11-07 点此下载全文 |
| 引用本文：李振雷,饶启超,韩蓬磊.斯特林制冷机直线电机的磁钢固定实验与研究[J].红外,2025,46(5):24~30 |
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| 中文摘要:作为红外探测器组件的重要组成部分，斯特林制冷机的直线电机固定方式是影响组件可靠性的一个重要因素。磁钢固定的破坏力高于10 kN就会减少磁钢脱落的风险，因此对斯特林制冷机直线电机在不同磁钢固定方式下的破坏力进行了研究。试验结果表明，在纯胶粘或者纯焊接情况下，涂满胶与焊接1圈时的最大破坏力接近(约为 6 kN)，均存在磁钢脱落风险。在两种方式相结合的情况下，涂满胶水、6点焊接时的破坏力为11.18 kN，满足磁钢固定要求；焊接1圈时的破坏力达到17.02 kN，大大增加了可靠性。仿真数据与实验结果接近，证明在胶水涂满情况下，避免磁钢脱落的最低焊接条件为6点焊接，低于6点焊接时则存在磁钢脱落风险，造成制冷机撞缸异响。该结果为后续制冷机的可靠性设计提供了参考。 |
| 中文关键词:直线电机 磁钢 可靠性 胶粘 焊接 |
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| Experiment and Research on Magnetic Steel Fixing of Stirling Refrigerator Linear Motor |
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| Abstract:As an important component of the infrared detector assembly, the fixing method of the linear motor of the Stirling refrigerator is an important factor affecting the reliability of the assembly. If the destructive force of the magnetic steel fixing is higher than 10 kN, the risk of the magnetic steel falling off will be reduced. Therefore, the destructive force of the linear motor of the Stirling refrigerator under different magnetic steel fixing methods is studied. The test results show that in the case of pure gluing or pure welding, the maximum destructive force when the glue is fully applied and one-circle welding is used is close (about 6 kN), and there is a risk of magnetic steel falling off. In the case of combining the two methods, the destructive force when the glue is fully applied and the 6-point welding is used is 11.18 kN, which meets the requirements of magnetic steel fixing; the destructive force when one-circle welding is used is 17.02 kN, which greatly increases the reliability. The simulation data is close to the experimental results, which proves that when the glue is fully applied, the minimum welding condition to avoid the magnetic steel falling off is 6-point welding. When the welding points are less than 6, there is a risk of magnetic steel falling off, causing the refrigerator to hit the cylinder and make an abnormal noise. This result provides a reference for the reliability design of subsequent refrigerators. |
| keywords:linear motor magnetic steel reliability gluing welding |
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