热泵空调用先导阀静态电磁吸力特性数学建模研究

摘要

The working process of electromagnetic was simulated in order to eliminate the noise in pilot value and the static elec-tromagnetic force was studied.The effect of shading coil on the static electromagnetic force of pilot valve was numerically stud-ied.The results show that the maximum values of electromagnetic force increased 106.54% after the external diameter of shading coil was increased from 7.6 mm to 9.6 mm.With the increase of internal diameter of shading coil from 5.6 mm to 7.6 mm,the maximum values of electromagnetic force decreased 12.56% and the minimum value decreased 62.96%.The maximum values of electromagnetic force declined 12.56% and the minimum value of electromagnetic force rose 125% after the thickness of shading coil was increased from 1.2 mm to 2.2 mm.The minimum electromagnetic force can be effectively increased by the optimum structure design.The results provide a theoretical basis for a reliable and reasonable design of pilot valve.%为消除先导阀在工作过程中的噪声及研究先导阀电磁吸力特性，本文对先导阀中电磁铁的静态吸力进行了模拟仿真。采用数学建模方法，研究了电磁铁分磁环的几何参数对先导阀静态电磁吸力的影响。结果表明：分磁环外径由7．6 mm 增至9．6 mm 时，芯铁吸合处电磁吸力的最大值与最小值均增大，其中最大值增加106．54％；分磁环内径从5．6mm 增大到7．6 mm时，芯铁吸合处电磁吸力的最大值降低12．56％，最小值降低62．96％；分磁环厚度由1．2 mm 增至2．2 mm 时，芯铁吸合处电磁吸力最大值降低12．5％，最小值增加125％。通过对分磁环的几何结构进行优化，有效提高了芯铁吸合处电磁吸力的最小值，满足先导阀对制冷剂进行有效换向的要求，为先导阀的结构设计提供了理论指导。