可调速同轴式异步磁力联轴器的传动机理及工作特性分析  

Transmission Mechanism and Performance Characteristic Analysis of Asynchronous Magnetic Coupling of Coaxial Type with Adjustable Speed System

作　　者：杨超君[1] 李文双[1] 周曰华[1] 徐燕飞[1] 张涛[2] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]江苏大学电气工程学院,江苏镇江212013

出　　处：《机械传动》2013年第10期14-18,共5页Journal of Mechanical Transmission

基　　金：国家自然科学基金项目(51075189)

摘　　要：提出了一种可调速同轴式异步磁力联轴器，通过远程智能控制器改变内外转子之间的啮合面积，调节气隙磁场强度，从而实现速度的可调节。同时，利用有限元软件对该磁力联轴器进行三维瞬态磁场模拟，分析研究了轴向位移变化对磁力联轴器的传动特性的影响。结果表明，径向气隙的磁通密度近似呈周期性分布，周期数为7，即永磁体的磁极对数；随着轴向位移长度的增加，径向气隙磁密逐渐减小，在轴向位移长度为16～24miil时，径向气隙磁密呈线性减小；输出转矩随轴向移动长度的增加近似呈线性减小，且在0～25ms时，输出转矩会出现一个较大波动，在100-200ms时转矩慢慢趋于平稳。A kind of asynchronous magnetic coupling of coaxial type with adjustable speed system is proposed. While the meshing area between the internal and external rotors is changed by the remote intelligent controller, the strength of magnetic field is increased or reduced accordingly, then its speed adjustment is realized. The three dimen- sional transient magnetic field of the magnetic coupling is simulated by using the finite element software and the influ- ence of changing the axial length on the transmission characteristic of the magnet coupling is investigated. The results show that the radial air gap magnetic flux density approximates to a periodic distribution, and the cycle number is 7 which is the number of pole pairs of the permanent magnet. The radial air - gap flux density decreases gradually with the increase of the axial movement length, and it presents a linear decrease when the axial movement length is between 16 and 24mm. The output torque has a linear decrease with the increase of the axial movement length. In addition, the output torque varies greatly in 0 - 25 ms, and it starts to level gradually in 100 - 200 ms.

关 键 词：磁力联轴器 调速 有限元分析 气隙磁密 转矩 

分 类 号：TH133.4[机械工程—机械制造及自动化]