| 摘要 |
PURPOSE:To evacuate in vacuum a superconductive rotary electric machine during the operation of the machine by providing a vacuum evacuation seal which communicates with a vacuum chamber in a coolant supplying and exhausting device. CONSTITUTION:Coolant is fed from a liquid phase coolant passage 14 through a fixed pipe 10 and a coolant supply pipe 9 into the liquid phase coolant chamber of a rotor, and through a coolant exhaust passage 15 into a gas phase coolant passage 16, thereby cooling a superconductive field coil in the liquid phase coolant chamber. A vacuum pump 26 is operated, and the vacuum chamber of the rotor is evacuated in vacuum through a vacuum exhaust hole 23 and an exhaust hole 25 from the vacuum layer 21 of a coolant supply pipe 19. In this manner, the layer 21 and the vacuum chamber can be externally evacuated in vacuum not only during the stoppage of the rotor but also during the rotation. |
