永磁轴承悬浮时的受力，与磁轴承的结构及永磁体材料参数有关。为了解决永磁轴承在大承载力工况时的应用，本文在已有的简单永磁轴承结构基础上，结合永磁体工作特性，针对一种新的径向磁化永磁推力轴承，使用虚位移法及线性叠加原理，得出了新型永磁推力轴承的数学解析模型。模型表明，在小间隙工况下，轴向承载力随气隙的增大而减小；间隙固定时，轴向承载力随轴向位移增加先增大后减小，存在最大承载力。利用有限元法对轴向磁力进行仿真计算，仿真结果与解析结果基本吻合。
The force of permanent magnetic bearing in suspension is related to configuration of permanent magnetic bearing and the material parameters of permanent magnetic. In order to overcome the permanent magnetic bearing application problem in large bearing capacity, based on the existing simple permanent magnetic bearing configuration, combined with performance characteristics of permanent magnetic, according to a new radial magnetized permanent magnetic thrust bearing(PMTB). The analytical calculation of axial bearing capacity is derived by virtual displacement method and principle of linear superposition. It is found that the axial bearing capacity decreases with the radial gap increasing in small gap condition. The axial bearing capacity of PMTB with the axial displacement increasing than decreasing in fixed gap, existence of maximum bearing capacity. The model of PMTB is simulated by finite-element method software and the simulation results are basically in agreement with the analytical results.
2019,41(9): 105-109 收稿日期：2018-02-09
DOI：10.3404/j.issn.1672-7649.2019.09.020
分类号：U664.142
作者简介：李贺(1993-),男,硕士研究生,研究方向为艇船动力装置振动与噪声控制
参考文献：
[1] 田录林, 李言, 杨国清, 等. 径向磁化的双筒永磁轴承轴向磁力研究[J]. 机械科学与技术, 2007, 26(9):1216-1219
[2] 田录林, 李言, 田琦, 等. 轴向磁化双环永磁轴承轴向磁力研究[J]. 中国电机工程学报, 2007, 27(36):41-45
[3] 田录林, 安源, 李言, 等. 轴向放置轴向磁化的多个永磁环轴承轴向磁力研究[J]. 机械科学与技术, 2008, 27(4):549-553
[4] 田录林, 李言, 田琦, 等. 径向磁化的多环嵌套永磁轴承轴向磁力解析模型[J]. 计算力学学报, 2010, 27(2):379-384
[5] 宋后定, 陈培林. 永磁材料及其应用[M]. 北京:机械工业出版社, 1984.
[6] 张云鹏, 刘淑琴, 李红伟, 等. 基于磁路分析的轴向混合磁轴承径向承载力解析计算[J]. 电工技术学报, 2012, 27(5):137-142
[7] 林其壬, 赵佑民. 磁路设计原理[M]. 北京:机械工业出版社.
