阀芯对中状态对磁自锁阀静态吸力的影响  

Study on static suction characteristics of magnetic latching valve with centering of armature

作　　者：陈铭 王春民[1] 赵双龙[1] CHEN Ming;WANG Chunmin;ZHAO Shuanglong(Xi'an Aerospace Propulsion Institute,Xi'an 710100,China)

机构地区：[1]西安航天动力研究所,陕西西安710100

出　　处：《火箭推进》2022年第5期38-45,共8页Journal of Rocket Propulsion

摘　　要：根据磁自锁阀的工作原理和结构特点,磁自锁阀的阀芯在永磁场作用下始终处于偏置状态。由于与阀体导向面挤压接触,增加了阀芯与阀体间的摩擦,导致磁自锁阀动作寿命短于直动螺管电磁阀,主要研究了磁自锁阀阀芯的对中状态对静态吸力的影响。首先,阐明了磁自锁阀工作原理及磁路设计特点;然后,在阀芯完全对中条件下,建立并对比了磁自锁阀的磁路分割法数学模型和磁场有限元仿真模型,计算得到阀芯所受静态电磁吸力;最后,改变阀芯位置,使阀芯处于偏心状态,仿真计算得到不同偏心距下的静态电磁吸力,结合阀芯表面的磁感应强度的变化情况得出影响规律。结果表明:阀芯在偏心状态下,会受到沿径向的侧向磁力作用,即永磁铁作用的侧向永磁力或线圈作用的侧向电磁力,侧向磁力随着偏心距的增加而快速增大。在阀芯表面沉积非金属膜层的工艺方法,可调节对中状态,有效减小侧向磁力,使磁自锁阀具有更长的动作寿命。According to the working principle and structural characteristics of the magnetic latching valve,the armature is always at the eccentric state.Under the action of permanent magnet field,the armature contacts with the valve body guide surface,increasing the friction between the armature and the valve body,resulting in the operating life of the magnetic latching valve shorter than that of the direct-acting solenoid valve.This paper mainly studies the influence of centering of magnetic latching valve armature on static suction.Firstly,the working principle and magnetic circuit design characteristics of magnetic latching valve were expounded.Then,under the condition of complete centering of armature,the mathematical model of magnetic circuit segmentation method and the finite element simulation model of magnetic field of magnetic latching valve were established and compared,and the static electromagnetic force of armature was calculated.Finally,the position of the armature was changed to make the armature at an eccentric state.The static electromagnetic force under different eccentricity was obtained by simulation,and the influence law was obtained by combining the change of the magnetic induction intensity on the surface of the armature.The results show that the armature will be affected by the lateral magnetic force along the radial direction that the lateral permanent magnetic force generated by the permanent magnet or the lateral electromagnetic force generated by the coil.The lateral magnetic force increases rapidly with the increase of eccentricity.The process of depositing non-metallic film on the surface of the armature can adjust to the centering,effectively reduce the lateral magnetic force and prolong the operation life of the magnetic latching valve.

关 键 词：磁自锁阀 偏心 静态吸力 磁路计算 电磁仿真 

分 类 号：V432[航空宇航科学与技术—航空宇航推进理论与工程]