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针对压水堆核电厂控制棒驱动机构的移动线圈附近机械及磁路结构,制作比例为1:2的简化模拟实验装置测试研究移动衔铁的运动特性。针对该模拟实验装置采用磁路计算和ANSYS有限元计算开展了移动线圈临界电流的影响因素的理论分析。理论计算与实验测试结果对比显示:ANSYS有限元法计算结果与试验测试达到较好的吻合。依据ANSYS有限元法理论计算结果,降低隔磁片磁导率、增加隔磁片厚度均可提高临界释放电流。导磁材料磁导率、提升负载、以及提升间隙均对移动衔铁的临界提升电流和/或临界释放电流产生显著影响。
In view of the mechanical and magnetic circuit structure near the moving coil of the control rod driving mechanism of the PWR nuclear power plant, a simplified simulation experimental device with a ratio of 1: 2 was manufactured to test the movement characteristics of the moving armature. The theoretical analysis of the influential factors of the critical current of the moving coil is carried out by using the magnetic circuit calculation and the ANSYS finite element method. The comparison between the theoretical calculation and the experimental test results shows that the ANSYS finite element method is in good agreement with the experimental test. According to the ANSYS finite element method, the critical discharge current can be increased by reducing the permeability of the separator and increasing the thickness of the separator. The permeability of the magnetically permeable material, the lifting load, and the lifting clearance all have a significant effect on the critical lift current and / or the critical release current of the moving armature.