Vertical-type magnetic bearing device

摘要

(57) [summary] [configuration] The total ball bearing 5 as this protection bearing, fixed shaft 1 For provided in the magnetic bearing apparatus for supporting a rotor 2 in a non-contact state, it receives the rotor 2 at the time of stopping the rotor 2. Fixed shaft 1 side inner ring 51 fixed to is divided axially into two annulus 6,7. Boundary portion S of the ring body 6 and 7, The raceway surface 51a, it was a position that avoids contact with the ball 53. EFFECT without the movement of the balls is inhibited by a ball insertion grooves, it is possible to improve the durability.