选针电磁阀是电子提花圆纬机的关键部件。为了提高该电磁阀在工作过程中的性能，利用Ansoft Maxwell软件建立了电磁阀的3D模型，并对该模型进行了电磁场有限元分析。针对电磁阀的线圈安匝数、永磁体材料等级及铁芯直径这三个设计参数对电磁阀性能的影响，利用正交实验设计法进行了对比。仿真分析结果表明，当永磁体组件在一侧极限位置时，永磁材料的等级对电磁力的影响最大，线圈安匝数对电磁力的影响最小；而在中间位置时线圈的安匝数对电磁力的影响最大，铁芯直径对电磁力影响最小。结合电磁阀的实际结构，得到了电磁阀的优化设计参数，线圈安匝数102安匝，永磁体使用N48H，铁芯直径2.5mm。%The needle selection solenoid valve is the key component of the electric jacquard circular weft knitting machine. In order to improve the performance of the solenoid valve, using the Ansoft Maxwell software, its 3D model was established and electromagnetic field was analyzed based on the finite element analysis. To analyze the influence of ampere turns, permanent magnetic material grade and diameter of the iron core on the performance of the solenoid valve, the orthogonal experiment design was used. The simulation results show that the permanent magnetic material grade has the maximum impact on the electromagnetic force andthe ampere turns has the minimum impact when the permanent magnet assembly is at the limit position on one side. But when it is at the middle position, the ampere turns has the maximum impact and the diameter of the iron core has minimum. Considering the structure of the solenoid valve, the optimal design parameters were determined, with ampere turns of 102A, the permanent magnetic material of NH48 and the diameter of the iron core of 2.5mm.
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