General Electric Company

John S Haydon

David Orus Fitts

John Herbert Wood

Neil S Rasmussen

Adrian M Beltran

The liner cap assembly includes an outer tubular sleeve, an inner cowl and a cone portion extending between the outer sleeve and the inner cowl. The cone portion includes a plurality of annular, concentrically arranged directional vanes on a downstream surface of the cone portion. At least the inner cowl and the cone portion are formed by casting. Plural apertures are formed in the cone portion during casting or after casting.

Method of forming slot-cooled single nozzle combustion liner cap

A single nozzle combustion liner cap assembly is provided in the form of an outer annular sleeve connected to an inner center ring or cowl by an angled web or cone portion formed with multiple arrays of holes for introducing air through the cone portion where it is then diverted in desired directions by cooling slots formed by integral baffles or vanes formed on the downstream side of the cone portion. In one exemplary embodiment, three baffles or directional vanes are provided on the cone portion, the two innermost of which direct air radially inwardly along the downstream surface of the cone toward the cowl, and the third of which directs air in two opposite directions, i.e., inwardly and outwardly along the cone portion. In this exemplary embodiment, the entire cap assembly is formed as one piece by an otherwise conventional investment casting process which provides accurately dimensioned cooling apertures and associated flow directional vanes or baffles without danger of cracking as in the conventional louvered sheet metal cap liner assemblies.

Cast slot-cooled single nozzle combustion liner cap

Cobalt-base superalloys having special utility in the production of industrial gas turbine hot gas path components because of their unique combination of properties in specially heat-treated condition including excellent hot corrosion resistance, stress-rupture strength at high temperature, metallurgical stability, tensile ductility and weldability, consist essentially of 0.3 to 0.6% carbon, 27-35% chromium, 9-16% nickel, 6-9% tungsten, 0.45 to 2.0% tantalum, up to 3.0% hafnium, up to 0.7% zirconium, not more than 2.0% iron, 1.5% manganese and silicon and 0.05% boron, balance cobalt, the carbide formers being selected to satisfy the following equations: ##EQU1##

Novel cobalt-base superalloy and cast and welded industrial gas turbine

A high temperature-resistant nickel-base alloy adapted for use in turbine nozzle components contains carefully balanced amounts of aluminum and titanium to render the alloy repair weldable. The levels of carbon and zirconium are also carefully controlled to improve the castability of the alloy so that large turbine components may be cast without hot tearing or microshrinkage.

Growing community of inventors

Mayfield, NY, United States of America

John S Haydon