高速燃油电磁阀电磁特性

Electromagnetic Characteristics of High Speed Fuel Solenoid Valve

高速燃油电磁阀作为航空发动机用叶片调节器的关键控制部件,其电磁特性直接影响叶片调节器的控制精度。首先基于Maxwell建立电磁阀数值模型。其次,深入研究磁路材料和外壳壁厚对电磁阀电磁力的影响规律。然后,对比研究极面形状和工作气隙相对位置对电磁力的影响规律。最后,研制了高速燃油电磁阀样机,进行实验验证。结果表明:磁路材料均为1J22时,电磁力最大;外壳壁厚0.75~1.5 mm时,各工作气隙下电磁力几乎不变;厚度小于0.75 mm时,电磁力随外壳壁厚的减小而下降;工作气隙小时,锥形极面衔铁电磁力小于平面极面,反之,锥形极面衔铁电磁力较大;工作气隙相对位置对电磁力影响有限。实验结果与仿真结果具有较好的吻合度,验证了仿真模型的正确性和研究方法的可行性。研究成果对高速燃油电磁阀电磁性能优化提升,提供了理论基础和数据支撑,具有实践意义。

High-speed fuel solenoid valve as a key control component of blade regulator for aeroengine.The electromagnetic characteristics affect the control precision of blade regulator directly.Firstly,a numerical model of solenoid valve based on Maxwell is established.Secondly,the influence of armature material and shell wall thickness on the electromagnetic force of solenoid valve are studied in-depth.Then,the influence of the armature shape,and the relative distance of the working air gap on the electromagnetic force of the high-speed solenoid valve is comparatively investigated.Finally,the prototype of the high-speed fuel solenoid valve is manufactured and the experimental verification is carried out.The results show the electromagnetic force is the largest when all magnetic circuit materials are 1J22.When the wall thickness of armature is 0.75~1.5 mm,the electromagnetic force changes little with the working air gap length.Electromagnetic force decreases with decreasing thickness when thickness is less than 0.75 mm.When the working air gap is small,the electromagnetic force of the conical pole face armature is smaller than that of the flat pole face and vice versa.The position of the working air gap has limited influence on the electromagnetic force.The experimental results show good agreement with the simulated ones,which verifies the correctness of the simulation model and the feasibility of the research method.The results provide theoretical basis and data to the high-speed fuel solenoid valve electromagnetic characteristics improvement,which have great practical significance.