| 摘要 |
PURPOSE:To lessen the consumption quantity of liquid helium introducing helium gas being gasified by cooling a superconductive field coil from an introduction pipe into a cable duct with a built-in measuring lead wire so as to cool it, and discharging it out of a rotor for a superconductive dynamo-electric machine from a discharge pipe. CONSTITUTION:One part of helium gas being gasified by cooling a superconductive field coil is introduced from the cooling gas introduction pipe 19 provided in a cable duct 16 into the cable duct 16. The helium gas is discharged through a cooling gas discharge pipe 20 after cooling a measuring lead wire 15 for transmitting the electric signals from a cable duct 16 and the measure element of a superconductive part passing through the cable duct 16 to outside at normal temperature, and is discharged to outside of the rotor for a superconductive dynamo-electric machine. Hereby, the helium gas, which is originally to be discharged to outside after cooling the superconductive field coil, can be effectively made use of.
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