Abstract
Permanent magnet bearings (PMBs) with Halbach arrays are widely adopted for their contactless and frictionless operation, offering great potential in artificial heart pumps, aerospace equipment, and flywheels. The load capacity of radial Halbach PMBs relies on the precise magnetic field interaction between the inner and outer rings, and axial deviation often occurs under combined radial and axial loads. However, the influence of this axial deviation on the supporting characteristics remains insufficiently studied. Therefore, this study focuses on the variation laws of the supporting characteristics (including supporting force and stiffness) under axial deviation conditions. The theoretical model of supporting force for radial Halbach array PMBs is first established through theoretical derivation. Subsequently, a finite element simulation model is built using Ansys EM software, and the consistency between the simulation model and the theoretical model is verified. Then, simulation analyses are conducted under different axial deviation values, and corresponding conclusions are drawn. This study addresses the neglect of axial deviation in previous research and provides a theoretical reference for the design, application, and performance calculation of PMBs.
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