| 摘要 |
PROBLEM TO BE SOLVED: To support a rotary shaft at a shaft center by spring support mechanisms even in a state with no electric power applied to magnetic bearings in regard to a rotary shaft spring support structure for a microgravity rotating device. SOLUTION: In a casing 10, the magnetic bearing 11 attached to an upper part fixing member 31, the magnetic bearing 33 for thrust, the magnetic bearing 12 with the spring support mechanism 358a attached to a lower part fixing member 32, and the spring support mechanism 35b are provided to support the rotary shaft 30. One ends of four arms 24-27 are attached to the rotary shaft 30, four experiment boxes 20-23 are attached to another ends, and an experiment is conducted by rotating them by a motor 34. The rotary shaft 30 is supported by the magnetic bearings 11, 12, and 33, and it is actively controlled so as to damp vibration when vibration is generated. Since the rotary shaft 30 is supported by the spring support mechanisms 35a and 35b when no electrical power is applied to the magnetic bearings, impact at starting can be prevented.
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