JPS54113807A - Gas helium discharge device for superconductive rotary machine - Google Patents

Abstract

PURPOSE: To provide a gas discharge device with a short length of the axis, by discharging a returned gas helium from the three way of inside-outside of a double cylinder and its end face, with a magnetic fluid shielding device used respectively in inner and outer circumferential area of the double rotary cylinder projecting from the rotor shaft.

CONSTITUTION: In a fixed casing 11, are constructed cylinder inner surfaces 11a and a cylindrical unit 14, concentrical with said inner surfaces 11a, with a double cylinder 20 protrusively provided, between the before said, from the rotary shaft end. Between peripheral surfaces 19 of the double cylinder 20 and the cylinder inner surfaces 11a, and between the cylinder perpheral surfaces and inner circumferential surfaces 18 of the double cylinder 20, are provided two ring- shape pawl blocks 21, 25. And in their end faces facing to each other, are cross-linked a magnets 22, 26, with a magnetic fluid sealing device 23, 27 intermediately positioned in suitable points of the magnets 22, 26 and the pawl blocks 21, 25. An opening of the returned gas helium flow path is provided in the inside 18 and the outside 19 of the double cylinder 20, with an opening made as well for the gas helium flow path in the end face of the point end part of the double cylinder.

COPYRIGHT: (C)1979,JPO&Japio