method and device for refilling of helium in the rotor of a superconducting generator

摘要

In order to replenish a helium bath 5 in the superconducting rotor 9 of an electrical machine, in which bath liquid helium boils at subatmospheric pressure, with liquid helium from a helium reservoir (not shown), the liquid helium in the reservoir being at ambient pressure and a part of the liquid helium changing to the vapor phase during flow from the reservoir to the bath, liquid helium is introduced via conduits 4, 12 into the bath 5 at a distance (R2) from the rotor axis of rotation 8, the liquid and vapor phases of the helium flowing from the reservoir to the bath are separated from one another in a phase separator 2 fixed to the rotor, and the separated vapor phase is extracted from the separator, being led away along coaxial conduit 6. The radius R0 of the liquid/vapour interface in the separator 2 is automatically controlled using a sensor 7. IMAGE