摘要
为了研究电涡流阻尼器冲击制动性能,在圆环形永磁体磁通密度和电涡流阻尼力公式的基础上,提出了4种圆筒型电涡流阻尼器磁路方案,分析了各方案静态磁场的气隙磁密分布规律,建立了冲击载荷下电涡流阻尼器瞬态电磁场仿真模型,对4种方案进行了涡流密度分布和制动性能的仿真。仿真结果表明:永磁体同极相对排列、具有导磁外筒的磁路设计方案涡流密度最大,阻尼效率最高,在高速冲击条件下导体内存在明显的涡流集肤效应。搭建了电涡流阻尼器冲击响应试验系统,测量了冲击载荷下阻尼器制动位移和速度变化规律,验证了仿真结果的正确性。研究表明圆筒型电涡流阻尼器具有优越的冲击制动性能,在列车制动、武器发射等工程领域具有广阔的应用前景。
In order to study the shock braking performance of the eddy current damper,based on the derivation of the magnetic flux density of the toroidal permanent magnet and the eddy current damping force formula,four magnetic circuit schemes of the cylindrical eddy current damper were proposed,and the air gap magnetic density distribution of each scheme was analyzed,and the simulation model of the transient electromagnetic field of the eddy current damper under impact load was established.The eddy current density distribution and braking performance of the four schemes were simulated.The simulation results show that the magnetic circuit design scheme in which the PMs with like poles in close proximity and added with a magnetic conducting cylinder has the highest eddy current density and damping efficiency.There is eddy current skin effect in the conductor under high speed impact load.An eddy current damper impact response test system was established to confirm the impact braking performance of eddy current damper.The displacement and velocity of damper braking under impact load were measured,and the experimental results verify the correctness of the simulation results.It shows that the eddy current damper has excellent braking performance under the impact force.It has important application value in the field of impact braking such as weapon launching and train braking.
作者
沈艳萍
刘宁
王楠楠
SHEN Yanping;LIU Ning;WANG Nannan(School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
出处
《兵器装备工程学报》
CAS
CSCD
北大核心
2021年第1期201-205,共5页
Journal of Ordnance Equipment Engineering
基金
装备预研国防重点实验室基金项目(6142A0302020517)。
关键词
电涡流阻尼器
冲击制动
磁路设计
气隙磁密
涡流密度
阻尼效率
eddy current damper
impact braking
magnetic circuit design
air-gap magnetic density
eddy current density
damping efficiency
