Turbine engine combustor heat shield with multi-height rails

Patent metadata

Field	Value
Publication number	US-2016265772-A1
Application number	US-201415031908-A
Country	US
Kind code	A1
Filing date	Oct 31, 2014
Priority date	Nov 4, 2013
Publication date	Sep 15, 2016
Grant date	—

Abstract

An assembly is provided for a turbine engine. This turbine engine assembly includes a combustor wall, which includes a shell and a heat shield. The heat shield includes a base and a plurality of panel rails. The panel rails are connected to the base and extend vertically to the shell. The panel rails include first and second rails. A vertical height of the first rail at a first location is less than a vertical height of the second rail at a second location.

First claim

What is claimed is:

1 . An assembly for a turbine engine, the assembly comprising:
a combustor wall including a shell and a heat shield, the heat shield including a base and a plurality of panel rails connected to the base and extending vertically to the shell, the plurality of panel rails including first and second rails, wherein a vertical height of the first rail at a first location is less than a vertical height of the second rail at a second location.

2 . The assembly of claim 1 , further comprising:
a mechanical attachment attaching the base to the shell; and a plurality of protrusions arranged around the mechanical attachment and connected to the base, wherein a vertical height of one of the protrusions is substantially equal to the vertical height of the first rail at the first location.

3 . The assembly of claim 1 , wherein the first rail is substantially parallel to the second rail.

4 . The assembly of claim 1 , wherein the combustor wall extends along a combustor axis, and the first location is substantially longitudinally aligned with the second location relative to the combustor axis.

5 . The assembly of claim 1 , wherein the first location comprises a substantially longitudinal midpoint of the first rail.

6 . The assembly of claim 1 , wherein
the plurality of panel rails includes a third rail, and the first rail is arranged between the second rail and the third rail.

7 . The assembly of claim 6 , wherein the vertical height of the first rail at the first location is less than a vertical height of the third rail at a third location.

8 . The assembly of claim 1 , wherein
the plurality of panel rails includes a third rail and a fourth rail, and the first rail and the second rail extend between the third rail and the fourth rail.

9 . The assembly of claim 1 , wherein the first and the second rails comprise circumferentially extending rails.

10 . The assembly of claim 1 , wherein the vertical height of at least a portion of the first rail is substantially constant.

11 . The assembly of claim 1 , wherein the vertical height of the first rail varies as the first rail extends longitudinally along the base.

12 . The assembly of claim 1 , further comprising:
a plurality of mechanical attachments attaching the base to the shell, wherein the first rail is located between the mechanical attachments and the second rail.

13 . The assembly of claim 1 , wherein
first and second cooling cavities extend between the shell and the heat shield, and the first rail defines an aperture which fluidly couples the first cooling cavity with the second cooling cavity.

14 . The assembly of claim 1 , wherein
the heat shield includes a plurality of panels arranged circumferentially around a centerline, and the base, the first rail and the second rail are included in one of the panels.

15 . A combustor wall for a turbine engine, the combustor wall comprising:
a combustor shell; and a combustor heat shield panel including a plurality of panel rails that extend vertically to the shell, the panel rails including an intermediate rail arranged between first and second end rails, wherein a mean vertical height of the intermediate rail is less than a mean vertical height of the first end rail.

16 . The combustor wall of claim 15 , wherein the mean vertical height of the first rail is less than a mean vertical height of the second end rail.

17 . The combustor wall of claim 15 , further comprising:
a mechanical attachment attaching the heat shield panel to the shell; and a plurality of protrusions arranged around the mechanical attachment and connected to a base of the heat shield panel; wherein a vertical height of one of the protrusions is substantially equal to a vertical height of the first rail at a first location.

18 . A heat shield for attaching to a shell of a turbine engine combustor wall, the heat shield comprising:
a heat shield panel including a panel base, a plurality of panel rails and at least one protrusion, each of the panel rails having a vertical height from the panel base to a respective distal rail surface of the panel rail adapted to engage the shell, wherein the panel rails include an intermediate rail and an end rail, and the vertical height of the intermediate rail at a first location is less than the vertical height of the end rail at a second location and substantially equal to a vertical height of the protrusion.

19 . The heat shield of claim 18 , wherein
the panel rails include a second end rail, and the intermediate rail is arranged between the end rail and the second end rail.

20 . The heat shield of claim 19 , wherein the vertical height of the intermediate rail at the first location is less than the vertical height of the second end rail at a third location.

Assignees

• United Technologies Corp

Inventors

• Eastwood Jonathan J
• Moura Dennis M

Classifications

• F23R3/06

  Arrangement of apertures along the flame tube · CPC title

• F23R3/04

  Air inlet arrangements · CPC title

• 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

• F23R3/002 Primary

  Wall structures (F23R3/02 and F23R3/007 take precedence) · CPC title