Igniter assembly for a gas turbine engine

Patent metadata

Field	Value
Publication number	US-2016356223-A1
Application number	US-201514731524-A
Country	US
Kind code	A1
Filing date	Jun 5, 2015
Priority date	Jun 5, 2015
Publication date	Dec 8, 2016
Grant date	—

Abstract

In one aspect the present subject matter is directed to an igniter assembly for a gas turbine engine. The igniter assembly includes an outer housing and an igniter tube that extends radially through the outer housing. The igniter tube includes an ignition tip, a nut coupled to the igniter tube and disposed at least partially within the outer housing and a biasing member that extends between an inner surface of a top portion of the outer housing and the nut. A flexible seal extends radially inwardly from a bottom side of the nut and a retention collar is coupled to the igniter tube proximate to the ignition tip. The retention collar is configured to couple to a mounting ring connected to an outer liner of a combustor for the gas turbine engine.

First claim

What is claimed is:

1 . An igniter assembly for a gas turbine engine, comprising:
an outer housing; an igniter tube that extends radially through the outer housing, the igniter tube having an ignition tip; a nut coupled to the igniter tube and disposed at least partially within the outer housing; a biasing member at least partially surrounding a portion of the igniter tube within the outer housing, the biasing member extending between an inner surface of a top portion of the outer housing and the nut; a flexible seal that extends radially inwardly from a bottom side of the nut; and a retention collar coupled to the igniter tube proximate to the ignition tip, wherein the retention collar is configured to couple to a mounting ring connected to an outer liner of a combustor for the gas turbine engine.

2 . The igniter assembly as in claim 1 , wherein the outer housing defines an opening positioned along a top portion of the outer housing, wherein a portion of the igniter tube extends radially through the opening.

3 . The igniter assembly as in claim 1 , wherein the outer housing defines one or more ventilation ports.

4 . The igniter assembly as in claim 1 , further comprising a collar that extends outwardly from the ignition tube within the outer housing, wherein a first end portion of the flexible seal is sealed between the nut and the collar.

5 . The igniter assembly as in claim 1 , further comprising a spacer, wherein the igniter tube extends radially through the spacer and wherein a bottom portion of the flexible seal is sealed against a top surface of the spacer.

6 . The igniter assembly as in claim 1 , wherein the biasing member is a wave spring.

7 . The igniter assembly as in claim 1 , wherein the biasing member is a coil spring.

8 . The igniter assembly as in claim 1 , wherein the nut is threadingly engaged with the igniter tube.

9 . The igniter assembly as in claim 1 , wherein at least a portion of an outer surface of the retention collar is spherical or arcuate.

10 . A combustion section of a gas turbine engine, comprising:
an inner liner and an outer liner radially spaced from the inner liner, the outer liner defining an opening that extends radially therethrough; a combustion chamber defined between the inner and outer liners; an outer casing that extends circumferentially around the outer liner, wherein the outer liner and the outer casing define an outer flow passage therebetween, wherein the outer casing includes an opening substantially aligned with the opening of the outer liner; and a fuel igniter assembly, the fuel igniter assembly comprising:
an outer housing coupled to the outer casing;
an igniter tube that extends radially through outer housing and the opening of the outer casing, the igniter tube having an ignition tip that extends at least partially through the opening of the outer liner;
a nut coupled to the igniter tube and disposed at least partially within the outer housing;
a biasing member at least partially surrounding a portion of the igniter tube within the outer housing, the biasing member extending between an inner surface of a top portion of the outer housing and the nut;
a flexible seal that extends radially inwardly from a bottom side of the nut towards the outer casing; and
a retention collar coupled to the igniter tube proximate to the ignition tip, wherein the retention collar is coupled to a mounting ring fixedly connected to the outer liner.

11 . The combustion section as in claim 10 , wherein the outer housing defines an opening positioned along a top portion of the outer housing, wherein a portion of the igniter tube extends radially through the opening.

12 . The combustion section as in claim 10 , wherein the outer housing defines one or more ventilation ports.

13 . The combustion section as in claim 10 , further comprising a collar that extends outwardly from the ignition tube within the outer housing, wherein a first end portion of the flexible seal is sealed between the nut and the collar.

14 . The combustion section as in claim 10 , further comprising a spacer disposed within the opening of the outer casing, wherein the igniter tube extends radially through the spacer and wherein a bottom portion of the flexible seal is sealed against a top surface of the spacer.

15 . The combustion section as in claim 10 , wherein the biasing member is a wave spring.

16 . The combustion section as in claim 10 , wherein the biasing member is a coil spring.

17 . The combustion section as in claim 10 , wherein the nut is threadingly engaged with the igniter tube.

18 . The combustion section as in claim 10 , wherein at least a portion of an outer surface of the retention collar is arcuate.

19 . The combustion section as in claim 18 , wherein at least a portion of an inner surface of the mounting ring is arcuate.

20 . The combustion section as in claim 10 , wherein the mounting ring includes one or more cooling air passages in fluid communication with the outer flow passage.

Assignees

• Gen Electric

Inventors

• Huang Fei
• Day Christophe J

Classifications

• F23R3/02

  characterised by the air-flow or gas-flow configuration (reverse- flow combustion chambers F23R3/54; cyclone or vortex type combustion chambers F23R3/58) · CPC title

• F05D2220/32

  in gas turbines · CPC title

• F05D2260/99

  Ignition, e.g. ignition by warming up of fuel or oxidizer in a resonant acoustic cavity · CPC title

• F02C7/266 Primary

  Electric (sparking plugs H01T) · CPC title

• F02C7/28

  Arrangement of seals · CPC title