JPS6235161U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a sealing device for a superconducting rotating electrical machine according to an embodiment of the invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a sectional view showing a conventional sealing device for a superconducting rotating electrical machine. In the figure, 1 is a casing, 2 is a pole piece, 6 is a rotating shaft, 7 is a bushing, 10 is a cylindrical magnet, 11 is a pair of magnet holding frames, 12 is a permanent magnet, 1
3 is a spacing piece. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A casing made of a magnetic material into which a rotating shaft made of a non-magnetic material is inserted, a cylindrical magnet installed in the casing, and the cylindrical magnet sandwiched in the casing. a pair of pole pieces made of a magnetic material attached to both sides of the pole piece and supporting the rotation shaft via bearings; and a bush made of a magnetic material located on the inner peripheral side of each of the pole pieces and attached to the rotation shaft. , which is equipped with a plurality of sealing means for sealing between the bush and the pole piece using magnetic fluid, wherein the cylindrical magnet is constituted by an outer ring and an inner ring, and the contact surface between the outer ring and the inner ring is A pair of magnet holding frames each having a magnet holding annular groove formed on either side thereof, a permanent magnet inserted at a distance into the magnet holding annular groove of the pair of magnet holding frames, and the magnet holding annular groove. and a spacer piece inserted between the permanent magnets. (2) A sealing device for a superconducting rotating electric machine according to claim 1, wherein the pair of magnet holding frames are fixed with an adhesive material. (3) A sealing device for a superconducting rotating electric machine according to claim 1 or 2 of the utility model registration claim, wherein the permanent magnet has an arc shape. (4) A sealing device for a superconducting rotating electric machine according to any one of claims 1 to 3 of the utility model registration claim, wherein the permanent magnet is fixed to a pair of magnet holding frames with an adhesive material. (5) The sealing device for a superconducting rotating electric machine according to any one of claims 1 to 4 of the claims for utility model registration, wherein the permanent magnet is constituted by a rare earth magnet. (6) A sealing device for a superconducting rotating electrical machine according to any one of claims 1 to 5 of the claims for utility model registration, characterized in that the spacing piece is fixed to the magnet holding frame with an adhesive material. (7) A sealing device for a superconducting rotating electric machine according to any one of claims 1 to 3 and 5 of the utility model registration claim, wherein the spacing piece has a wedge function.