| 摘要 |
PROBLEM TO BE SOLVED: To prevent a contact failure between constituting members with good cooling capability of a current lead. SOLUTION: In a current lead which supplies current from a room temperature part to a low temperature part of the rotor of a superconducting rotating machine, a multiple-layer pipe is constituted of an inner pipe 7 with fins of a conductive metal having fins 7a extending at the inside circumference side in the axial direction and protruding in the radial direction and an outer pipe 8 with fins of a conductive metal which forms coolant flowing channels in the axial direction between the outside circumferential surface of the inner pipe 7 with fins and each fin. Furthermore, passing holes 9 are each provided in the pipe wall between the fins 7a of the inner pipe 7 with fins in the axial direction with an appropriate space, so that the coolant flowing channels can be communicated with each other in the radial direction. |
