磁阻式永磁磁力联轴器磁场分析及动力学研究

发布时间：2018-06-02 16:47

本文选题：联轴器 + 磁阻原理　；参考：《合肥工业大学》2017年硕士论文

【摘要】：随着人们对永磁材料的认识和研究,越来越多的磁力机械逐渐走入大众的视野。磁力联轴器作为联轴器家族中重要的一员,在实现传递扭矩与转动功能的选择上越发受到学者的重视。磁阻式永磁磁力联轴器是一款基于磁阻电机,运用磁阻原理传递转矩与运动的新型磁力联轴器。由于其结构的特殊性,该磁力联轴器具有转子强度高、结构简单、过载时会自动保护、可以实现高速传动等优点。本论文首先阐述了磁阻式永磁磁力联轴器的工作原理和结构特点,给出了其三维模型图。依照其结构特点构建了磁力联轴器的等效磁路,运用“代角法”求得各个磁路的磁导。根据各磁路磁导,从磁场能量出发得到了联轴器的传递转矩。然后运用Ansoft Maxwell有限元仿真软件构建了磁阻式磁力联轴器二维与三维模型。对该联轴器进行二维分析,分别得到了转子耦合长度和工作气隙厚度等因素与联轴器气隙磁场之间的影响关系;对该联轴器进行三维分析,从磁力链的角度说明了结构的合理性,同时也得到了输入、输出转子的齿数等因素与输出转矩之间的关系曲线。最后运用Proe建立磁阻式永磁磁力联轴器的三维模型,导入Ansys中进行动力学分析计算。通过对输出转子做最大受力时的静力学分析,得到其最大变形量为0.000265mm。对其做带有预应力的模态分析,得到了前五阶振型及频率,利用临界转速与频率的关系,求得该联轴器输出转子的工作转速最大可以达到15240r/min。有限元仿真结果进一步验证了该磁力联轴器的可行性。
[Abstract]:With the understanding and research of permanent magnetic materials, more and more magnetic machinery has gradually come into the public view. As an important member of the coupling family, magnetic coupling is paid more and more attention to in the choice of torque transfer and rotation function. The magnetoresistive permanent magnet coupling is a new type of magnetic coupling based on magnetoresistive motor, which uses the principle of magnetoresistive to transfer torque and motion. Because of the particularity of its structure, the magnetic coupling has the advantages of high rotor strength, simple structure, automatic protection when overload, high speed transmission and so on. In this paper, the working principle and structure characteristics of magnetoresistive permanent magnet coupling are introduced, and the 3D model diagram is given. According to its structural characteristics, the equivalent magnetic circuit of magnetic coupling is constructed, and the magnetic conductance of each magnetic circuit is obtained by means of "substitute angle method". According to the magnetic conductance of each magnetic circuit, the transmission torque of the coupling is obtained from the magnetic field energy. Then the two-dimensional and three-dimensional models of magnetoresistive magnetic coupling are constructed by using Ansoft Maxwell finite element simulation software. The effects of rotor coupling length and working air gap thickness on the coupling magnetic field of the coupling are obtained, and the three dimensional analysis of the coupling is carried out. The rationality of the structure is explained from the point of view of magnetic chain, and the relationship curve between the number of teeth of the input and output rotor and the output torque is obtained. Finally, the three-dimensional model of magnetoresistive permanent magnet coupling is established by Proe and introduced into Ansys for dynamic analysis and calculation. The maximum deformation of the output rotor is 0.000265 mm by statics analysis when the output rotor is subjected to the maximum force. The first five modes and frequencies are obtained by modal analysis with prestressing force. By using the relation between critical speed and frequency, the maximum operating speed of the rotor output of the coupling can reach 1 5240 r / min. The finite element simulation results further verify the feasibility of the magnetic coupling.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH133.4

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