| 摘要 |
<p>The current lead operates at a cryogenic temperature. The collector ring operates at room temperature. While the rotor is being cooled down there is considerable relative movement between them due to thermal contraction. Electrical connection is ensured by interconnecting "rear" or cold side rods with "front" or warm side rodes. The device of the present invention comprises an insulating connector box (12) mounted on the shaft of the rotor. Inside the connector box there are inner and outer pairs of contact blocks (24,23) which clamp onto both a single rear rod (14) and a pair of front rods (16,18). The clamping force is provided by flyweights (28a,b,c). The rotor may thus be cooled to cryogenic temperatures while stationary or rotating slowly since the rods are loosely clamped if at all, and can slide relative to each other. Once working temperatures are reached the rotor is accelerated and the rods are tightly clamped to provide good electrical contact.</p> |
