Attachment scheme for a ceramic bulkhead panel

Patent metadata

Field	Value
Publication number	US-2016186997-A1
Application number	US-201414909226-A
Country	US
Kind code	A1
Filing date	Jul 22, 2014
Priority date	Aug 1, 2013
Publication date	Jun 30, 2016
Grant date	—

Abstract

A turbine engine includes a compressor section, a combustor in fluid communication with the compressor section, and a turbine section in fluid communication with the combustor section. The combustor includes a combustor region defined by at least one bulkhead panel and at least one heat shielding panel inside the combustor region. The at least one heat shielding panel is connected to the bulkhead panel via at least one cooled fastener.

First claim

1 . A turbine engine comprising:
a compressor section; a combustor in fluid communication with the compressor section; a turbine section in fluid communication with the combustor; said combustor further comprises a combustor region defined by at least one bulkhead panel, and at least one heat shielding panel interior to said combustor region, wherein said at least one heat shielding panel is connected to said bulkhead panel via at least one cooled fastener.

2 . The turbine engine of claim 1 , wherein said combustor comprises a plurality of bulkhead panels, and wherein each of said bulkhead panels is connected to at least one heat shielding panel via at least one cooled fastener.

3 . The turbine engine of claim 1 , wherein each of said cooled fasteners comprises:
a fastener component defining an axis and including a cooling channel defined within the fastener component; a spring disposed about said fastener and providing axial loading to said fastener, thereby holding said heat shielding panel in place relative to said bulkhead panel.

4 . The turbine engine of claim 3 , wherein said cooling channel includes an opening on a first axial end of the fastener component, and at least one opening on a second axial end of the fastener component.

5 . The turbine engine of claim 4 , wherein said cooling channel includes more than one opening on a second axial end of the fastener component.

6 . The turbine engine of claim 3 , wherein each of said cooled fasteners further comprises:
a cold side bushing disposed about said fastener component and at least partially within said spring, the cold side bushing including a flange member interfaced with said spring.

7 . The turbine engine of claim 6 , wherein said spring further interfaces with said bulkhead panel on an end opposite said flange member.

8 . The turbine engine of claim 3 , wherein each of said cooled fasteners further comprises a hot side bushing disposed about said fastener component, wherein the hot side bushing interfaces with the heat shielding panel and a head of the fastener to maintain the heat shielding panel in position relative to the bulkhead panel.

9 . The turbine engine of claim 8 , wherein said hot side bushing is a washer positioned between said bulkhead panel and said heat shielding panel.

10 . The turbine engine of claim 8 , wherein said hot side bushing has an L-shaped cross section and is at least partially positioned in a fastener hole in said bulkhead panel.

11 . The turbine engine of claim 1 , wherein said bulkhead panel is metal and wherein said heat shielding panel is a ceramic material.

12 . The turbine engine of claim 1 , wherein a stem of each of said cooled fasteners extends through an oversized fastener hole in said bulkhead panel and a hole in said heat shielding panel.

13 . The turbine engine of claim 12 , wherein said hole is shaped such that a head of said fastener component interfaces with the shaped hole.

14 . A fastener comprising:
a fastener component defining an axis and including a cooling channel defined within the fastener component; a spring disposed about said fastener and providing axial loading to said fastener, thereby holding a second panel in place relative to a first panel.

15 . The fastener of claim 14 , wherein said cooling channel includes an opening on a first axial end of the fastener component, and an opening on a second axial end of the fastener component.

16 . The fastener of claim 14 , wherein each of said cooled fasteners further comprises a cold side bushing disposed about said fastener component and at least partially within said spring, the cold side bushing including a flange member interfaced with said spring.

17 . The fastener of claim 14 , wherein each of said cooled fasteners further comprises a hot side bushing disposed about said fastener component, wherein the hot side bushing is operable to interface with a first panel in conjunction with a head of said fastener interfacing with the first panel, thereby maintaining a position of the first panel relative to a second panel.

18 . The fastener of claim 14 , wherein said cooled fastener further comprises a retainer operable to axially load said spring.

19 . A method for cooling a fastener comprising the steps of:
receiving a fluid impinging on a first end of a fastener into a cooling channel defined within the fastener, wherein said fluid is cool relative to a surface on at least one end of said fastener; and passing said fluid through said cooling channel, thereby internally cooling said fastener.

20 . The method of claim 19 , wherein said step of receiving the fluid impinging on the first end of the fastener into the cooling channel defined within the fastener comprises receiving air exiting a compressor section of a turbine engine and impinging upon a combustor section of the turbine engine.

21 . The method of claim 19 , wherein the step of passing said fluid through said cooling channel further comprises expelling said fluid into a combustor of a turbine engine.

Assignees

• United Technologies Corp

Inventors

• Sadil Andreas
• Jause Jonathan M
• Broulidakis Alexander

Classifications

• F23R3/50

  Combustion chambers comprising an annular flame tube within an annular casing (toroidal combustion chambers F23R3/52) · CPC title

• F23R3/60

  Support structures; Attaching or mounting means · CPC title

• F02C7/16

  characterised by cooling medium · CPC title

• F23R3/002

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

• F02C7/18

  the medium being gaseous, e.g. air {(F02C7/125 takes precedence)} · CPC title