电子测量与仪器学报

巩启,高琳,苏宇锋.抗磁气流混合悬浮理论及仿真分析*[J].电子测量与仪器学报,2021,35(11):76-82

抗磁气流混合悬浮理论及仿真分析*

Theory and simulation analysis of diamagnetic airflow hybrid levitation

DOI：

英文关键词:diamagnetic levitation levitated rotor airflow levitation finite element analysis energy harvester

基金项目:国家自然科学基金（U1904169）项目资助

作者	单位
巩启	郑州大学机械与动力工程学院郑州450001
高琳	郑州大学机械与动力工程学院郑州450001
苏宇锋	郑州大学机械与动力工程学院郑州450001

Author	Institution
Gong Qi	School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001,China
Gao Lin	School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001,China
Su Yufeng	School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001,China

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中文摘要:

提出了一种抗磁气流混合悬浮结构，利用提升磁铁和气流使悬浮转子稳定地悬浮于热解石墨板上方。通过理论分析和有限元数值分析方法对该抗磁悬浮结构的悬浮特性开展研究；利用压缩氮气作为气源进行实验测试研究。在标准温度和压力下，当气流量为2 198 sccm时，悬浮转子转速达到16 666 r/min，悬浮间隙为07 mm。通过调整喷嘴的垂直位置，悬浮转子可以在悬浮间隙为02~08 mm的任意高度上稳定悬浮旋转。当气流速度达到2 748 sccm时，悬浮转子的转速增加到22 300 r/min。采用混合悬浮结构的悬浮转子具有较大的悬浮间隙和较高的旋转速度。这种悬浮结构有望应用于气流驱动下的传感、能量采集和空气轴承。

英文摘要:

In this paper, a diamagnetic airflow hybrid levitation structure is reported, with a levitated rotor stably levitated above a diamagnetic disc just using a lifting magnet and airflow. The levitation characteristics were studied through theoretical analysis and finite element analysis (FEA) method. And driving experiment was carried out using compressed nitrogen as driving source. The rotation speed of the levitated rotor is 16 666 r/min, and the levitation gap is 07 mm when the airflow rate is 2 198 sccm under standard temperature and pressure. At the same time, the levitated rotor can be stably levitated and rotated at any height from 02 mm to 08 mm by adjusting the vertical position of the nozzles. When the airflow rate reaches 2 748 sccm, the speed of the levitated rotor is 22 300 r/min. With the hybrid levitation structure, the levitated rotor has a large levitation gap and a high rotation speed. This levitation structure is expected to be applied to sensing, energy harvesting and air bearing under actuation of airflow.

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