极靴一体化磁性液体密封结构

于文娟; 李德才; 张志力

doi:10.3969/j.issn.0258-2724.20210936

极靴一体化磁性液体密封结构

doi: 10.3969/j.issn.0258-2724.20210936

于文娟^1,,
李德才^{1, 2, ,},
张志力¹

1.
北京交通大学机械与电子控制工程学院，北京 100044
2.
清华大学摩擦学国家重点实验室，北京 100084

基金项目: 国家自然科学基金（51735006，U1837206，51927810）；北京市自然科学基金（3182013）

详细信息

作者简介:
于文娟（1996—），女，博士研究生，研究方向为磁性液体的理论及应用，E-mail：19116026@bjtu.edu.cn

通讯作者:
李德才（1965—），男，教授，博士，研究方向为磁性液体的理论及应用，E-mail：lidecai@mail.tsinghua.edu.cn

中图分类号: TB42
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- 被引次数: 0
出版历程
- 收稿日期: 2021-11-24
- 修回日期: 2022-05-05
- 网络出版日期: 2023-03-17
- 刊出日期: 2022-05-07

Magnetic Fluid Sealing Structure of Integrated Pole Shoe

YU Wenjuan^1
,,
LI Decai^{1, 2
, ,},
ZHANG Zhili¹

1.
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
2.
State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China

摘要

摘要:
极靴一体化磁性液体密封具有良好的应用前景，为研究极靴一体化磁性液体密封耐压性能的影响因素，对一体化极靴结构参数进行了分析. 首先，推导了磁性液体密封结构的耐压公式；其次，使用有限元仿真分析磁性液体密封结构的耐压性能，首次分析了有无薄壁、薄壁厚度、极齿与薄壁的轴向距离以及多级极靴尺寸分布比例对于磁性液体密封结构耐压的影响；最后，加工了极靴一体化磁性液体密封装置，搭建实验台进行实验研究. 结果表明：一体化极靴比传统极靴磁性液体密封耐压略小，但相差不大；薄壁厚度以及极齿与薄壁轴向距离均与密封结构耐压值成反比；对于多级极靴结构，磁铁之间的极靴长度大于两侧极靴长度，更利于磁性液体密封的耐压.
- 一体化极靴 /
- 磁性液体 /
- 密封 /
- 耐压 /
- 有限元
Abstract:
Magnetic fluid seal of integrated pole shoe has promising prospect. To study the factors affecting its pressure resistance, the structural parameters of the integrated pole shoe are analyzed. First, the pressure resistance formula of the magnetic fluid sealing structure is deduced. Second, the finite element simulation is used to analyze the pressure performance of the magnetic fluid seal structure, in terms of thin-wall presence, thin-wall thickness, axial distance between pole teeth and thin wall, and the distribution ratio of multi-stage pole shoe size. Finally, the magnetic fluid sealing device of integrated pole shoe was made, and an experimental platform was built. The results show that the pressure resistance of the integrated pole shoe is slightly smaller than that of the traditional pole shoe, but the difference is trivial; the thin wall thickness and the axial distance between pole teeth and the thin wall are inversely proportional to the pressure resistance of the sealing structure; for the multi-stage pole shoe structure, the length of the pole shoe between the magnets is longer than the pole shoe length on both sides, which is more conducive to the pressure resistance of the magnetic fluid seal.
- integrated pole shoe /
- magnetic fluid /
- sealing /
- pressure resistance /
- finite element

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图 1 传统磁性液体密封结构

Figure 1. Traditional magnetic fluid sealing structure

下载: 全尺寸图片幻灯片

图 2 极靴一体化磁性液体密封结构

Figure 2. Magnetic fluid sealing structure of integrated pole shoe

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图 3 磁性液体密封结构简化模型

Figure 3. Simplified model of magnetic fluid seal structure

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图 4 2Cr13材料的B-H曲线

Figure 4. B-H curve of 2Cr13 material

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图 5 网格结果

Figure 5. Meshing result

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图 6 磁场分布

Figure 6. Magnetic field distribution

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图 7 路径处的磁场大小分布

Figure 7. Magnetic field distribution along path

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图 8 一体化极靴尺寸标注

Figure 8. Dimensions of integrated pole shoe

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图 9 两种极靴极齿处的磁感应强度分布

Figure 9. Magnetic induction intensity distribution at pole teeth corresponding to two types of pole shoes

下载: 全尺寸图片幻灯片

图 10 不同壁厚的一体化极靴极齿处的磁感应强度分布

Figure 10. Magnetic induction intensity distribution at pole teeth of integrated pole shoes with different wall thicknesses

下载: 全尺寸图片幻灯片

图 11 不同轴向距离的一体化极靴极齿处的磁感应强度分布

Figure 11. Magnetic induction intensity distribution at pole teeth of integrated pole shoes with different axial distances

下载: 全尺寸图片幻灯片

图 12 不同分布比例的一体化极靴极齿处的磁感应强度分布

Figure 12. Magnetic induction intensity distribution at pole teeth of integrated pole shoe with different distribution ratios

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图 13 磁性液体密封实验台以及密封装置

Figure 13. Magnetic fluid sealing experimental setup and sealing device

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图 14 磁性液体密封耐压与磁性液体注入量的关系

Figure 14. Relationship between pressure resistance of magnetic fluid seal and amount of injected magnetic fluid

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表 1 不同壁厚对照组磁感应强度差值的总和

Table 1. Sum of differences of magnetic induction intensity in control group with different wall thicknessess

薄壁厚度/mm 0.8 1.0 1.2

∆B_SUM/T 7.3489 7.3352 7.2693

下载: 导出CSV

表 2 不同轴向距离对照组磁感应强度差值的总和

Table 2. Sum of differences of magnetic induction intensity in control group with different axial distances

轴向距离/mm 0.8 1.0 1.2 1.4

∆B_SUM/T 7.3352 7.2882 7.2170 7.0876

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表 3 极靴尺寸分布比例对照组参数

Table 3. Distribution ratios of pole shoe size corresponding to control group parameters

对照组 L₁ L₂ L₃
长度/
mm 极齿
数/个长度/
mm 极齿
数/个长度/
mm 极齿
数/个

A1 7.0 5 7.8 7 6.0 4
A2 6.0 4 8.8 8 6.0 4
A3 7.0 5 6.8 6 7.0 5

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表 4 极靴尺寸分布比例对照组磁感应强度差值的总和

Table 4. Sum of differences of magnetic induction intensity in control groupp

对照组 A1 A2 A3

∆B_SUM/T 7.0893 7.3352 6.9507

下载: 导出CSV

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