Design of a Halbach Array Permanent Magnet Damping System for High Speed Compressor With Large Thrust Load
Design of a Halbach Array Permanent Magnet Damping System for High Speed Compressor With Large Thrust Load
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DOI：
10.1109/tmag.2014.2335715
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发表时间：
2015
影响因子：
2.1
通讯作者：
Yun Le;Jiancheng Fang;Jinji Sun
中科院分区：
文献类型：
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作者：
Yun Le;Jiancheng Fang;Jinji Sun
许多磁悬浮压缩机运行在第一弯曲临界速度以上，这引起了高振动问题，并在设计径向磁轴承控制器时引入了复杂性；此外，高速压气机存在较大的轴向载荷，这对推力轴承的承载能力提出了很高的要求，也给轴向磁轴承的设计带来了复杂性。本文提出了一种采用哈尔巴赫磁体阵列的无源阻尼器。哈尔巴赫阻尼器可以在没有控制系统的情况下提供径向阻尼力，也可以提供较大的轴向力，以减轻轴向轴承的负担。首先，研究了阻尼器位置对响应幅值的影响，得到了最优的方便位置；然后，建立了哈尔巴赫阻尼器的解析模型，讨论了一些重要结构参数对系统性能的影响。最后给出了具有柔性转子和大推力载荷的高速压气机的设计实例。有限元结果验证了分析和设计结果，表明哈尔巴赫阻尼器能提供所需的轴向力，并能有效地控制柔性转子的首次弯曲振动。
Many magnetically suspended compressors operate above the first bending critical speed, which gives rise to high vibration problems and introduces complications in designing controllers for radial magnetic bearings; besides, a significant axial load always exists in high-speed compressors, which requires a high load capacity in the thrust bearings and introduces complications in designing axial magnetic bearings. In this paper, a passive damper with the Halbach magnet array is proposed. The Halbach damper can provide radial damping force without control system, and can also provide a large axial force to reduce the burden of axial bearing. Firstly, the effect of the location of dampers on response amplitude is studied and the optimum convenient location is obtained. Then, an analytical model of the Halbach damper is established and the effects of some important structure parameters on the system performance are discussed. Finally, a design example for a high-speed compressor with flexible rotor and a large thrust load is given. The analytical and design results, which are verified by the finite element result, show that the Halbach damper can provide the required axial force, and it is effective in controlling the first bending vibration of the flexible rotor.