Laser clad fuel injector premix barrel

Patent metadata

Field	Value
Publication number	US-9228498-B2
Application number	US-201213409103-A
Country	US
Kind code	B2
Filing date	Mar 1, 2012
Priority date	Mar 1, 2012
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

A fuel injector for a gas turbine engine may include a center body disposed about a longitudinal axis, and a premix barrel positioned radially outwardly from the center body to define an annular passageway between the center body and the premix barrel. The annular passageway may extend from an upstream end that is configured to be fluidly coupled to a compressor to a downstream end that is configured to be fluidly coupled to a combustor. The premix barrel may include a first portion at the upstream end and a second portion at the downstream end. The first portion may include a stainless steel material, and the second portion may include a nickel based superalloy material. The second portion may be coupled to the first portion by a laser clad coupling.

First claim

What is claimed is:

1. A fuel injector for a gas turbine engine, comprising:
a center body disposed about a longitudinal axis; and
a premix barrel positioned radially outwardly from the center body to define an annular passageway therebetween, the annular passageway extending from an upstream end configured to be fluidly coupled to a compressor of the turbine engine to a downstream end configured to be fluidly coupled to a combustor of the turbine engine, the premix barrel including:
a first portion at the upstream end, the first portion including a stainless steel material; and
a second portion at the downstream end, the second portion including a nickel based superalloy material, the second portion being grown on the first portion by laser cladding feed stock of the nickel based superalloy material over an inclined wall of the first portion, wherein the inclined wall of the first portion forms an acute angle with the longitudinal axis.

2. The fuel injector of claim 1 , wherein the second portion of the premix barrel has a length between about 0.5-2.5 inches and a thickness between about 0.15-0.5 inches.

3. The fuel injector of claim 2 , wherein the length is between about 0.75-1.5 inches and the thickness is between about 0.2-0.5 inches.

4. The fuel injector of claim 1 , wherein the nickel based superalloy material is Alloy-X.

5. The fuel injector of claim 1 , wherein the second portion is configured to be coupled to the combustor, and the first portion is brazed to an air swirler of the fuel injector.

6. A fuel injector of a gas turbine engine, comprising:
a substantially tubular body extending along a longitudinal axis from a first end to a second end, the tubular body including;
a first portion made of a first material proximate the first end, the first portion having a first inner diameter and a first outer diameter; and
a second portion made of a second material proximate the second end, the second portion having a second inner diameter and second outer diameter, wherein the second portion is grown on the first portion by laser cladding feed stock of the second material over an inclined wall of the first portion, wherein the inclined wall of the first portion forms an acute angle with the longitudinal axis.

7. The fuel injector of claim 6 , wherein the first inner diameter is substantially equal to the second inner diameter.

8. The fuel injector of claim 7 , wherein the second outer diameter is larger than the first outer diameter.

9. The fuel injector of claim 6 , wherein an interface between the first portion and the second portion is inclined.

10. The fuel injector of claim 6 , wherein the first portion includes stainless steel and the second portion includes a nickel based superalloy.

Assignees

• Krichever Alexander Ilich
• Corr Ii Robert Anthony
• Barker Peter
• Struck Bruno Enriquez
• Montague John Preston
• Solar Turbines Inc

Inventors

• Krichever Alexander Ilich
• Corr Ii Robert Anthony
• Barker Peter
• Struck Bruno Enriquez
• Montague John Preston

Classifications

• B23K9/048

  on cylindrical surfaces · CPC title

• B23K26/0006

  taking account of the properties of the material involved (B23K26/32, B23K26/40 take precedence) · CPC title

• B23K26/342

  Build-up welding · CPC title

• B23K26/34

  Laser welding for purposes other than joining · CPC title

• B23K2103/08

  Non-ferrous metals or alloys · CPC title