Theory and simulation analysis of diamagneticairflow hybrid levitation
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TN03;TK83

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    Abstract:

    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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  • Online: June 08,2022
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