基于永磁体的磁流变抛光励磁装置设计与仿真

曹顺涛; 陈观慈; 李明春

doi:10.13394/j.cnki.jgszz.2022.0195

基于永磁体的磁流变抛光励磁装置设计与仿真

doi: 10.13394/j.cnki.jgszz.2022.0195

昆明理工大学机电工程学院, 昆明 650500

详细信息

作者简介:
陈观慈，男，1977年生，教授、博士生导师。主要研究方向：摩擦磨损与控制。E-mail： gcchen@kmust.edu.cn

中图分类号: TG58
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- 被引次数: 0
出版历程
- 收稿日期: 2022-11-13
- 修回日期: 2022-12-12
- 录用日期: 2022-12-23
- 刊出日期: 2023-08-30

Design and simulation of magnetorheological polishing excitation device based on permanent magnet

College of Mechanical and Electrical Engineering, Kunming University of Technology, Kunming 650500, China

摘要

摘要:
励磁装置作为磁流变抛光设备的核心部件，其能否产生稳定均匀的高梯度磁场，是决定磁流变抛光成功的关键因素。采用扇形永磁体设计磁流变抛光轮励磁装置，并运用ANSYS Electronics Desktop等软件从永磁体数量、充磁方式、排布方式、气隙宽度等方面对励磁装置进行仿真分析，得到不同工况下的磁感应线及磁感应强度分布。结果表明：当气隙宽度为4 mm时，采用单一永磁体轴向充磁产生的磁感应强度最大，可达358.4 mT，理论上可在抛光轮表面形成宽为26 mm、高为6.0 mm的抛光缎带。
- 永磁体 /
- 磁流变抛光 /
- 励磁装置 /
- 磁场
Abstract:
As the core component of magnetorheological polishing equipment, the key factor determining the success of magnetorheological polishing is whether the excitation device can generate a stable and uniform high gradient magnetic field. The sector permanent magnet was used to design the excitation device of the magnetorheological polishing wheel. The ANSYS Electronics Desktop and other softwares were used to simulate and analyze the excitation device various aspects, including the number of permanent magnets, magnetization modes, arrangement modes, and air gap widths. The magnetic induction lines and magnetic induction intensity distribution under different working conditions were obtained. The results show that when the air gap width is 4 mm, the magnetic induction intensity produced by axial magnetization of a single permanent magnet is the largest, reaching 358.4 mT. Theoretically, a polishing ribbon with a width of 26 mm and a height of 6.0 mm can be formed on the surface of the polishing wheel.
- permanent magnets /
- magnetorheological polishing /
- excitation device /
- magnetic field

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图 1 磁流变抛光轮

Figure 1. Magnetorheological polishing wheel

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图 2 励磁装置

Figure 2. Excitation device

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图 3 励磁装置坐标系

Figure 3. Excitation device coordinate system

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图 4 磁感应线分布示意图

Figure 4. Schematic diagram of magnetic induction line distribution

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图 5 扇形永磁体充磁方式

Figure 5. Magnetization modes of sector permanent magnet

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图 6 不同永磁体数量及排布方式的励磁装置模型

Figure 6. Excitation device models with different permanent magnet quantities and arrangements

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图 7 各仿真组的磁感应线分布

Figure 7. Distribution of magnetic induction lines of each simulation group

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图 8 各仿真组的磁感应强度分布云图

Figure 8. Cloud charts of magnetic induction intensity distribution of each simulation group

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图 9 各仿真组的磁感应强度分布曲线

Figure 9. Distribution curves of magnetic induction intensity of each simulation group

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图 10 气隙为2 mm和6 mm时的磁感应强度分布云图

Figure 10. Cloud charts of magnetic induction induction intensity distribution with air gap of 2 mm and 6 mm

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图 11 不同气隙大小时的磁感应强度分布曲线

Figure 11. Distribution corves of magnetic induction intensity at different air gap sizes

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表 1 钕铁硼N50的性能参数

Table 1. Performance parameters of NdFeB N50

参数	数值
剩磁感应强度 B_r / T	1.41～1.45
矫顽力 H_cb / (kA·m⁻¹)	828～907
内禀矫顽力 H_cj / (kA·m⁻¹)	≥876
最大磁能积 (BH)_max / (kJ·m⁻³)	382～398
最高工作温度 T_w / ℃	≤70

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表 2 仿真方案

Table 2. Simulation schemes

仿真编号	磁体数量 n / 个	充磁方式	磁极排列分布
1	1	轴向充磁	NS
2	2	轴向充磁	SNSN
3	2	轴向充磁	SNNS
4	2	径向辐射	NS
5	2	径向平行	NS

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表 3 仿真结果汇总

Table 3. Simulation results summary

仿真编号	最大磁感应强度 B_max / mT	能否形成抛光头
1	358.4	形成宽为26 mm，峰值高度为 6.0 mm的抛光头
2	276.8	形成宽为18 mm，峰值高度为 4.0 mm的抛光头
3	11.0	无抛光头形成
4	112.5	无抛光头形成
5	102.7	无抛光头形成

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