Igniter for gas turbine engine

Patent metadata

Field	Value
Publication number	US-10865761-B2
Application number	US-201916369741-A
Country	US
Kind code	B2
Filing date	Mar 29, 2019
Priority date	Sep 12, 2018
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

There is disclosed an igniter for a gas turbine engine including: a base; a glow plug heater rod extending from the base along an axis and terminating in a rod end; and a fuel receiver adjacent the heater rod, the fuel receiver including a portion located closest to the heater rod, the rod end protruding axially relative to the axis from the fuel receiver portion located closest to the heater rod.

First claim

The invention claimed is:

1. An igniter for a gas turbine engine comprising: a base; a glow plug heater rod extending from the base along an axis and terminating in a rod end; and a fuel receiver adjacent the heater rod, the fuel receiver extending axially between a closed end proximate the base and an open end proximate the rod end, the igniter seated from a fuel source of the gas turbine engine but for at the open end of the fuel receiver, the fuel receiver including a portion located closest to the heater rod, the rod end protruding axially relative to the axis from the fuel receiver portion located closest to the heater rod.

2. The igniter of claim 1 , wherein the fuel receiver is delimited by an inner surface of a sleeve surrounding the heater rod.

3. The igniter of claim 2 , wherein the sleeve extends circumferentially around the heater rod along at least a portion of a length of the heater rod.

4. The igniter of claim 2 , wherein the inner surface of the sleeve extends circumferentially around the heater rod along at least a portion of a length of the heater rod, said sleeve having a plurality of fins.

5. The igniter of claim 1 , wherein the heater rod has a heating section axially extending along between opposite ends of a heater contained within the heater rod, the heating section protruding axially from the fuel receiving portion located closest to the heating section.

6. The igniter of claim 5 , wherein the fuel receiving portion located closest to the heating section is a portion of a sleeve which is remote from the base and radially closest to the heating section.

7. The igniter of claim 6 , wherein a distance along the axis between the rod end and the fuel receiver portion located closest to the rod end is less or equal to two times a length of the heating section.

8. The igniter of claim 7 , wherein the distance is less or equal to one and a half times the length of the heating section.

9. The igniter of claim 7 , wherein the distance corresponds to the length of the heating section.

10. The igniter of claim 7 , wherein the distance is about half the length of the heating section.

11. The igniter of claim 7 , wherein the distance is about a quarter of the length of the heating section.

12. The igniter of claim 1 , wherein the fuel receiver portion located closest to the heating section is spaced apart from the heater rod by a gap.

13. The igniter of claim 1 , wherein the fuel receiver portion located closest to the heating section is made of metal.

14. The igniter of claim 1 , further comprising a sleeve extending circumferentially around the heater rod along at least a portion of a length of the heater rod, the sleeve structurally connected to the base and protruding along the axis from the base towards the rod end, the fuel receiver being provided at an end of the sleeve remote from the base.

15. The igniter of claim 1 , wherein the fuel receiver has a portion connected to the heater rod between the rod end and the base.

16. The igniter of claim 1 , wherein the base includes a body of a glow plug, the glow plug including the heater rod and at least a casing portion of an adaptor, the casing portion of the adaptor connected to the body of the glow plug around the body of the glow plug.

17. The igniter of claim 16 , wherein the fuel receiver forms part of the casing portion of the adaptor.

18. The igniter of claim 16 , wherein the adaptor further comprises a liner portion configured to be matingly connected to a liner of the gas turbine engine, the fuel receiver being defined by the liner portion.

19. The igniter of claim 1 , wherein a portion of an outer surface of the base is threaded for engaging a correspondingly threaded aperture of a casing of the gas turbine engine.

20. A gas turbine engine comprising:
an inner liner and an outer liner defining a combustion chamber between the inner liner and the outer liner, one of the inner liner and the outer liner defining an igniter hole; and
an igniter received within the igniter hole, the igniter having a base, a glow plug heater rod extending from the base along an axis and terminating in a rod end, and a fuel receiver adjacent the heater rod, the fuel receiver including a portion located closest to the heater rod, the rod end protruding axially relative to the axis from the fuel receiver portion located closest to the heater rod and protruding beyond the one of the inner liner and the outer liner into the combustion chamber.

Assignees

• Pratt & Whitney Canada

Inventors

• Freer Richard
• Mccaldon Kian
• Hu Tin-Cheung John
• Bousquet Michel
• Fortin André

Classifications

• F23D11/446

  heated by an auxiliary flame · CPC title

• F23Q7/001

  Glowing plugs for internal-combustion engines · CPC title

• F02P19/02 Primary

  electric, e.g. layout of circuits of apparatus having glowing plugs · CPC title

• F23R3/18

  Flame stabilising means, e.g. flame holders for after-burners of jet-propulsion plants · CPC title

• F23R3/30

  comprising fuel prevapourising devices · CPC title