| 摘要 |
PURPOSE:To effectively use helium gas generated in a low temperature rotor by providing a heat exchanger for accelerating the temperature rise of a coolant for cooling a torque tube at part of the inner wall of an ambient temperature rotor as part of a coolant exhaust passage. CONSTITUTION:Ga helium evaporated in a low temperature rotor is exhausted from the rotor. Cryogenic gas helium is radially outward raised from the vicinities 10a, 10b of the center of the rotational shaft of the rotor to the low temperature sides 11a, 11b of torque tubes 1a, 1b, and the gas helium itself rises its temperature while cooling the tubes 1a, 1b. This gas helium is led to the inner peripheral side to combine with the gas helium after cooling the tube 1a of the side directly coupled with the vicinity 15 of the shaft, and led to the axial shaft end side in the pipe 16. In this case, a heat exchanger 9 is disposed adjacent to an outer cylinder 8 to suppress the entering heat into the rotor. |
