Electric machine with a rotor with a superconducting field winding
AssigneeSiemens Aktiengesellschaft
InventorsOtto Muller, Dieter Kullmann, Erich Weghaupt
Life of this patent
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Abstract
In an electric machine with a superconducting exciter winding and a cylindrical shaft end piece in its rotor around which end piece a nonrotating connector head part is arranged, with at least one bearing and at least one sealing device provided between these components, the radial bearing clearance is made so small that the connector head part follows the radial deflections of the shaft end piece from its ideal position relative to the axis of rotation permitting the use of seals with good sealing properties, in particular ferrofluidic seals.
Claims15
In an electric machine with a rotor rotatably mounted in a stationary machine housing for rotation about an axis of rotation, and containing a superconducting field winding to be cooled, one side of the rotor body being designed as a cylindrical shaft end piece, said cylindrical shaft end piece deflecting from its ideal central position with respect to the axis of rotation, a nonrotating part of a connector head surrounding said cylindrical shaft and piece, at least one bearing and at least one sealing device disposed between one shaft end piece and the nonrotating part of the connector head, and means for permitting coolant transfer at the connector head, the improvement comprising:
- a. the bearing having such close radial tolerances that the nonrotating part of the connector heat part will follow at least the main part of the radial deflections of the shaft end piece from its ideal position;
- and
- b. the nonrotating part of the connector head connected directly or indirectly with the stationary machine housing in such a manner that it is capable of said radial deflections.
In an electric machine with a rotor rotatably mounted in a stationary machine housing for rotation about an axis of rotation, and containing a superconducting field winding to be cooled, one side of the rotor body being designed as a cylindrical shaft end piece, a nonrotating part of a connector head surrounding said cylindrical shaft end piece, at least one bearing and at least one sealing device disposed between the shaft end piece and the connector head, and means for permitting coolant transfer at the connector head, the improvement comprising:
- a. the nonrotating part of the connector head mounted in such a manner that it is capable of radial deflections with respect to the stationary machine housing;
- and
- b. the bearing having such close radial tolerances that the connector head part will follow the radial deflections of the shaft end piece from its ideal position with respect to said axis of rotation.
Dependencies are inferred from the claim text.