Divided insert for steam cooled nozzles and method for supporting and separating divided insert
AssigneeGeneral Electric Company
InventorsGary Michael Itzel, Robert Henry Devine, II, John Alan Eastman
Life of this patent
Estimating the term…
Abstract
A pair of hollow elongated leg sections are disposed in one or more of the nozzle vane cavities of a nozzle stage of a gas turbine. Each leg section has an outer wall portion with apertures for impingement-cooling of nozzle wall portions in registration with the outer wall portions. The leg sections may be installed into the cavity separately and support rods support and maintain the leg sections in spaced relation, whereby the designed impingement gap between the outer wall portions of the leg sections and the nozzle wall portions is achieved. The support rods are secured to the inner wall portions of the leg sections by welding or brazing.
Claims20
An insert for a cavity of a nozzle vane of a gas turbine for impingement-cooling of the walls of the vane, comprising:
- a pair of elongated hollow leg sections disposable in side-by-side relation to one another within the cavity, said leg sections having a plurality of apertures through oppositely directed outer walls thereof, inner wall portions of the leg sections, being spaced from one another;
- and
- at least one support rod extending between said inner wall portions of said leg sections for maintaining said inner wall portions of said leg sections spaced from one another.
An insert disposed in a cavity of a nozzle vane of a gas turbine for impingement-cooling walls of the vane, the assembly comprising:
- a pair of elongated hollow insert leg sections disposable in side-by-side relation to one another within the cavity, said leg sections having a plurality of apertures through oppositely directed outer walls thereof, inner wall portions of the leg sections being spaced from one another;
- and
- at least one support rod disposed to extend between said leg sections for maintaining said inner wall portions of said leg sections spaced from one another, first end portions of said leg sections having inner wall surfaces disposed for engagement with one another to facilitate securement of said leg sections to one another.
A method of installing a cooling medium insert into a cavity of a nozzle vane for a gas turbine wherein the insert includes a pair of elongated hollow leg sections, each having an outer wall portion with a plurality of apertures therethrough, comprising:
- (a) inserting the leg sections into the vane cavity for disposition therein in side-by-side relation to one another, with the outer wall portions thereof in opposed facing relation to side wall portions of said vane;
- and
- (b) subsequent to step (a), and while the leg sections remain in the vane cavity, inserting a support rod to extend between spaced inner wall portions of said leg sections to support and maintain said leg sections in spaced relation.
Dependencies are inferred from the claim text.