Brush seal for a steam turbine and method of retrofitting
AssigneeGeneral Electric Company
InventorsNorman Arnold Turnquist, Thomas Martin Angeliu, Peter Louis Andresen, Mark Edward Burnett, Frederick George Baily
Life of this patent
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Abstract
A brush seal is provided wherein the brush seal is disposed in a section of a steam turbine for reducing leakage of a working fluid across a pressure drop. The brush seal comprises a bristle holder attachable to the steam turbine and a plurality of bristles comprising Ni, Cr, Mo, Fe, W, Mn, V, Si, and C.
Claims18
A brush seal, disposed in a section of a steam turbine, for reducing leakage of a working fluid across a pressure drop, said brush seal comprising:
- a bristle holder attachable to said steam turbine;
- and
- a plurality of bristles coupled to said bristle holder, said plurality of bristles comprising Ni, Cr, Mo, Fe, W, Mn, V, Si, and C.
A brush seal, disposed in a section of a steam turbine, for reducing leakage of a working fluid across a pressure drop, said brush seal comprising:
- a bristle holder attachable to said steam turbine;
- and
- a plurality of bristles coupled to said bristle holder, said plurality of bristles comprising a low radiation activation material, said material having less than 2.5% Cobalt by weight.
A steam turbine comprising:
- a stator disposed in said steam turbine;
- a rotor spaced apart from said stator so as to define a gap therebetween;
- and
- a brush seal disposed in a section of said steam turbine, said brush seal comprising:
- a)a bristle holder coupled to said stator;
- and
- b)a plurality of bristles coupled to said bristle holder and wherein said plurality of bristles consists essentially of Ni, Cr, Mo, Fe, W, Co, Mn, V, Si, and C.
A method of retrofitting a steam turbine comprising:
- providing a stator;
- said stator disposed in said steam turbine;
- providing a rotor, said rotor spaced apart from said stator so as to define a gap therebetween;
- and
- providing a brush seal, said brush seal being disposable in a section of said steam turbine,
- wherein said brush seal comprises a plurality of bristles having about 16% Cr, about 16% Mo, about 5% Fe, about 4% W, less than about 2.5% Co, about 1% Mn, about 0.35% V, about 0.08 Si, about 0.01% C and a remainder of Ni.
Dependencies are inferred from the claim text.