| 摘要 |
PURPOSE:To prevent the axial deflection of a rotor and support the rotor stably in the contactless state in a superconductive bearing device by specifying the width and thickness of an annular permanent magnet, provided at the disc part of the rotor, in relation to a clearance between the permanent magnet and a superconductor part. CONSTITUTION:A shaft like rotor 1 placed vertically, and a superconductor part 3 are disposed in a housing. The rotor 1 is provided with a permanent magnet part 2 in the concentric circle state. In the housing, the annular superconductor part 3 is disposed opposedly to the lower end face of the permanent magnet part 2, and the permanent magnet part 2 is levitated by the superconductive action of the superconductor part 3. In such a superconductive bearing device, the width (radial dimension) and thickness (axial dimension) of an annular permanent magnet 6 embedded in the horizontal disc part 4 of the permanent magnet part 2 are set to be 5-10 times as large as an opposed space between the permanent magnet part 2 and the superconductor part 3, and the thickness of a superconductor 8 embedded in the disc shape supporting body 7 of the superconductor part 3 is set to be 0.5-1.5 times as large as the width of the permanent magnet 6.
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