永磁型磁流变液联轴器的磁路设计及性能研究

Magnetic Field Design and Properties Study of the Permanent Magnet-type Magnetic Fluid Coupling

采用永磁体作为磁流变液联轴器的磁源,设计出一种新型的永磁型磁流变液极限联轴器。磁流变液的工作间隙尺寸远小于永磁体的轴向尺寸,可忽略端部效应,将磁流变液联轴器的磁场求解简化为二维平面磁场。基于磁路设计的基本原理,采用有限元分析软件,对永磁型磁流变液联轴器的磁场分布进行模拟,并研究了不同工作间隙对磁场分布及磁流变液剪切应力的影响,推导出永磁型磁流变液联轴器传递的极限力矩与相关设计参数的关系。

To design a new type of permanent magnet-type magnetic fluid coupling with ultimate torsion,permanent magnets are used as the magnetic source.The working gap size of the coupling is much smaller than the axial size of the permanent magnet,then end effect can be neglected,so the calculation about magnetic field can be simplified to two-dimensional.By the basic design principles of the magnetic circuit,in order to simulate the distribution of the magnetic field in the permanent magnet-type magnetic fluid coupling,the finite element analysis software is used.Based on the magnetic field analysis and modeling,the distribution of the magnetic field and the effect on shear stress in the working gap have been calculated and the realatiomship between ultimate transmission torsion and design parameters has also been derived.