| 摘要 |
PROBLEM TO BE SOLVED: To provide a flywheel energy storage which eliminates influence of running vibration, yawing, pitching, etc., at the time of being loaded on a self-running machine such as an electric motorcar, etc. SOLUTION: A rotary shaft 14 is arranged vertically within a device housing 9, and a discoidal flywheel 2 is integrated with the bottom of the rotary shaft 14. The rotary shaft 14 is supported rotatably by an upper ball bearing 16 and a lower ball bearing 17 of roller bearings, and a magnetic ball bearing 1 of a magnetic energizing means. The magnetic bearing 1 is a passive thrust magnetic bearing which constitutes a magnetic circuit of a magnetic rotor 25 and a magnetic stator 26, and it energizes the rotary shaft 14 upward with the energizing force corresponding to the weight of the rotary shaft 14, the flywheel 2, etc., and the pre-load of the lower ball bearing 17. Moreover, damping rings 19 and 20 of vibration attenuating means having large rigidity and an attenuating function are interposed between the device housing 9 and both ball bearings 16 and 17. |
