SUPERCONDUCTIVE MAGNETIC BEARING AND COOLING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a superconductive magnetic bearing which easily reduces a heat load of a cooling source, and to provide a cooling device.SOLUTION: A superconductive magnetic bearing 15 includes: a superconductive bulk body 31 disposed at a lower end 14B of a rotary shaft 14; a superconductive coil 33 disposed around the superconductive bulk body 31; and a cooling device 41 thermally connected with the superconductive coil 33. The superconductive magnetic bearing 15 supports the rotary shaft 14 in a manner that the rotary shaft 14 is levitated making no contact with the superconductive coil 33. The superconductive magnetic bearing 15 further includes: an inner tank 35 including the superconductive coil 33 therein; and a throat part 37 which is connected with the inner tank 35 and covers an outer periphery of the rotary shaft 14. Mirror processing is performed to parts of an inner peripheral surface 37A of the throat part 37 and an outer peripheral surface 14C of the rotary shaft 14.