Analysis of dynamic and static features of intrinsically safe electromagnetic valves and optimization of influencing parameters

Abstract

In response to the problems of insufficient electromagnetic driving force and slow response speed of electromagnetic valves under the constraints of driving power and electromagnetic valve volume, the dynamic and static features of electromagnetic valves are analyzed. Through simulation analysis and prototype experiments, it is verified that improving the intrinsically safe electromagnetic force can significantly improve the response features of electromagnetic valves. A plan to improve the response features of electromagnetic valves by optimizing the electromagnetic force is determined. The evaluation indicators for the features of intrinsically safe electromagnets, including effective stroke index, average electromagnetic force index, and static comprehensive performance index, have been proposed to solve the problem of difficult performance evaluation of electromagnets caused by different stroke. The Maxwell electromagnetic simulation software is used to analyze the effects of changes in guide tube depth, armature radius, non working air gap, non working air gap, and pot mouth height on the static features of the electromagnet. The sensitivity of different parameters to the static features is obtained, providing a reference for selecting the size control range in parameter optimization. A second-order response surface model is constructed based on the results of orthogonal experiments to evaluate the comprehensive features of electromagnets using iron core structural parameters. Genetic algorithm is used to optimize the iron core parameters. The prototype test results show that the optimized electromagnetic force in the horizontal section of the electromagnet has increased by 56%, the effective stroke has increased by 26%, and the opening response time of the intrinsically safe electromagnetic valve has been shortened by 52.5%.

Abstract

摘要：针对在駆动功率和电磁阀体积约束下存在的电磁铁駆动力不足、电磁阀响应速度慢的问题, 分析了电 磁阀的动静态特性, 通过仿真分析和样机试验验证了提高本安型电磁铁电磁力可明显改善电磁阀的响应特性, 确 定了通过优化电磁力改善电磁阀响应特性的方案。提出了本安型电磁铁特性评价指标：有效行程指标、平均电磁 力指标和静态综合性能指标, 解决了因电磁铁行程不同而造成的电磁铁性能评价困难的问题。利用Maxwell电 磁仿真软件分析了导向筒深度变化量&、衔铁半径变化量各、非工作气隙变化量^1、非工作气隙变化量表2、盆口 高度变化量如对电磁铁静态特性的影响, 得到不同参数对静态特性的敏感度, 为参数优化中尺寸控制范围的选 择提供参考依据。通过正交试验结果构建了铁芯结构参数对电磁铁综合特性评价指标的二阶响应面模型, 利用 遗传算法对铁芯参数进行优化。样机试验结果表明：优化后电磁铁水平段电磁力提升了 50%, 有效行程提高了 26%, 本安型电磁阀的开启响应时间缩短了 52.5%。