Metal injection molding attachment hanger system for a cooling liner within a gas turbine engine swivel exhaust duct

Patent metadata

Field	Value
Publication number	US-9297335-B2
Application number	US-4641108-A
Country	US
Kind code	B2
Filing date	Mar 11, 2008
Priority date	Mar 11, 2008
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

An exhaust duct assembly includes an attachment hanger system having at least one component manufactured by metal injection molding (MIM).

First claim

What is claimed is:

1. An exhaust duct assembly for a gas turbine engine comprising:
an exhaust duct case segment;
a cooling liner segment; and
an attachment hanger system attachable between said exhaust duct case section and said cooling liner segment, said attachment hanger system having at least one component manufactured by metal injection molding (MIM).

2. The assembly as recited in claim 1 , wherein said cooling liner segment is a cylindrical or serpentine member.

3. The assembly as recited in claim 1 , wherein said exhaust duct case segment supports a bearing joint.

4. The assembly as recited in claim 1 , wherein said cooling liner segment includes a hot sheet, a cold sheet and at least one of stiffeners which attach said hot sheet to said cold sheet.

5. The assembly as recited in claim 1 , wherein said attachment hanger system extends at through a corrugated cold sheet of said cooling liner segment.

6. The assembly as recited in claim 5 , wherein said attachment hanger system is foldable at least partially into said corrugated cold sheet.

7. The assembly as recited in claim 1 , wherein said at least one component manufactured by metal injection molding (MIM) comprises a cold sheet bracket.

8. The assembly as recited in claim 1 , wherein said at least one component manufactured by metal injection molding (MIM) comprises a pin.

9. The assembly as recited in claim 1 , wherein said at least one component manufactured by metal injection molding (MIM) comprises a hinge.

10. The assembly as recited in claim 1 , wherein said at least one component manufactured by metal injection molding (MIM) comprises a duct bracket.

11. The assembly as recited in claim 1 , wherein said at least one component manufactured by metal injection molding (MIM) comprises a T-bolt.

12. The assembly as recited in claim 1 , wherein said at least one component manufactured by metal injection molding (MIM) comprises a flanged bushing.

13. The assembly as recited in claim 1 , wherein said at least one component manufactured by metal injection molding (MIM) comprises a threaded fastener.

14. A swivelable exhaust duct assembly for a gas turbine engine comprising:
a first exhaust duct case segment, said first exhaust duct case segment defines a first inner diameter;
a second exhaust duct case segment;
a bearing joint between said first exhaust duct case segment and said second exhaust duct case segment, said bearing joint defining a second inner diameter less than said first inner diameter;
a cooling liner segment; and
an attachment hanger system attachable between said first exhaust duct case segment and said cooling liner segment, said attachment hanger system foldable to insert said cooling liner segment into said first exhaust duct case segment , said attachment hanger system having at least one component manufactured by metal injection molding (MIM).

15. The assembly as recited in claim 14 , wherein said first exhaust duct case segment is a cylindrical member and said second exhaust duct case segment is cylindrical member.

16. The assembly as recited in claim 15 , wherein said cooling liner segment is a cylindrical or serpentine member.

17. The assembly as recited in claim 14 , wherein said attachment hanger system comprises at least one hanger bracket assemblies.

18. The assembly as recited in claim 17 , wherein at least two of said multitude of hanger bracket assemblies in at least one of said multitude of rows are attached together through an axial stiffener.

Assignees

• Harris Andrew H
• United Technologies Corp

Inventors

• Harris Andrew H

Classifications

• C04B35/638

  Removal thereof · CPC title

• B22F3/225

  by injection molding · CPC title

• F02K1/822 Primary

  Heat insulating structures or liners, cooling arrangements, e.g. post combustion liners; Infrared radiation suppressors · CPC title

• F02K1/78

  Other construction of jet pipes · CPC title

• B22F5/009

  of turbine components other than turbine blades (of turbine blades B22F5/04) · CPC title