Heatshielded article

• US 20060005543A1
• Filed: 07/12/2004
• Published: 01/12/2006
• Est. Priority Date: 07/12/2004
• Status: Active Grant

• Current Assignee: United Technologies Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: United Technologies Corporation (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Burd, Steven W.
• Granted Patent: US 7,140,185 B2
• Time in Patent Office: Days
• US Class Current: 60/752
• CPC Class Codes: F23M 2900/05001 Preventing corrosion by using special lining materials or other techniques
• CPC Class Codes: F23M 2900/05004 Special materials for walls or lining
• CPC Class Codes: F23M 5/085 using air or other gas as the cooling medium
• CPC Class Codes: F23R 2900/03042 Film cooled combustion chamber walls or domes
• CPC Class Codes: F23R 2900/03044 Impingement cooled combustion chamber walls or subassemblies
• CPC Class Codes: F23R 3/002 Wall structures F23R3/02 and F23R3/007 take precedence

Abstract

A heatshielded article includes a support 18 and at least one heatshield 20 secured adjacent to the support. The heatshield includes a shield portion 28 spaced from the support. The shield portion includes a hot side 30 and an uncoated cold side 32. A projection projects from an origin 36 at the shield portion to a terminus 38 remote from the shield portion. The terminus includes a protective coating 64 along at least a portion of its length.

Claims

1. A heatshielded article, comprising:

a support;

at least one heatshield secured adjacent to the support;

the heatshield having a shield portion spaced from the support, the shield portion including a hot side and an uncoated cold side; and

a projection projecting from the cold side, the projection having an origin at the shield portion and a terminus remote from the shield portion, the terminus including a coating along at least a portion of its length.

2. The article of claim 1 wherein impingement holes penetrate the support and film holes penetrate the heatshield.

3. The article of claim 1 wherein the coating is selected from the group consisting of thermal barrier coatings, environmental barrier coatings and oxidation resistant coatings.

4. The article of claim 1 wherein the coated terminus contacts the support.

5. The article of claim 1 wherein the terminus has a length extending substantially parallel to the support, the terminus being spaced from the support over at least part of the length.

6. The article of claim 1 wherein the projection is at least one of a boundary wall, a rib, a collar, a radiator fin, a standoff, and a rim.

7. The article of claim 1 wherein the support and the heatshield are a support shell and a heatshield panel respectively for a gas turbine engine combustor.

8. A heatshield having a shield portion with a hot side and an uncoated cold side, a projection projecting from an origin at the cold side to a terminus remote from the cold side, the terminus including a coating along at least a portion of its length.