| 摘要 |
PROBLEM TO BE SOLVED: To restrain deformation by centrifugal force, and uniformly hold clearance between thrust bearings by vertically symmetrically installing permanent magnet assemblies on the upper side and the lower side of a thrust collar so that both centrifugal forces become the same with each other. SOLUTION: When operating a superconducting flywheel, centrifugal force FRu of an upper side permanent magnet assembly 60b and centrifugal force FRd of a lower side permanent magnet assembly 60a become the same with each other since weight, a shape and an installing position of these magnet assemblies 60b, 60a are equal to each other, and laterally uniformly act on the cylindrical part 5a of a thrust collar 5 since the assemblies are vertically symmetrically installed in the disk part 5b. The comparatively thin cylindrical part 5a is vertically uniformly bent in the outer peripheral direction over both ends from the root to the central disk part 5b by these centrigugal forces FRu , FRd , and does not deviate to the upper side like a conventional product. Therefore, clearance between the permanent magnet assembly 60a and a superconducting bulk body is also uniformized over the bearing inner/outer periphery to prevent reduction in bearing performance. |
