Compliant heat shield liner hanger assembly for gas turbine engines

Patent metadata

Field	Value
Publication number	US-10077681-B2
Application number	US-201314759623-A
Country	US
Kind code	B2
Filing date	Dec 13, 2013
Priority date	Feb 14, 2013
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

Hanger assemblies for coupling heat shield liners to cases of gas turbine engines are disclosed. The disclosed hanger assemblies include a pivoting joint coupled between a first segment and a second segment. The first segment is coupled to the liner by a liner attachment assembly and the second segment is coupled to the case by a case attachment assembly. At least one of the liner attachment assembly or the case attachment assembly permits translational movement of the first or second segments respectively with respect to the liner or case to accommodate for thermal expansion in the axial direction.

First claim

The invention claimed is:

1. A hanger assembly for coupling a heat shield liner to a case, the hanger assembly comprising:
a pivoting joint coupling a first segment to a second segment, the first segment being coupled to the heat shield liner by a liner attachment assembly, the second segment being coupled to the case by a case attachment assembly;
at least one of the liner attachment assembly and the case attachment assembly permitting translational movement of the first segment or the second segment, respectively, with respect to the case,
wherein the case attachment assembly includes an annular outer bushing passing through and connected to the case, the annular outer bushing accommodating a fastener that couples the annular outer bushing to the second segment, the fastener being spaced apart from the annular outer bushing to define an annular gap between the fastener and the annular outer bushing that permits translational movement of the second segment and the fastener with respect to the annular outer bushing and the case.

2. The hanger assembly of claim 1 , wherein the fastener includes a proximal threaded section that connects the fastener to the second segment, the fastener also including a distal head and a middle shoulder section disposed between the proximal threaded section and the distal head that is wider than the proximal threaded section, the middle shoulder section being longer than the annular outer bushing to provide at least one clearance gap between the distal head and the annular outer bushing or between the second segment and the annular outer bushing that permits translational movement of the second segment and the fastener with respect to the annular outer bushing and the case.

3. The hanger assembly of claim 2 further comprising: a washer disposed between the distal head of the fastener and the annular outer bushing.

4. The hanger assembly of claim 1 , wherein the liner attachment assembly includes a stud connected to the heat shield liner and threadably connected to the first segment.

5. The hanger assembly of claim 1 , wherein the first segment includes a distal forked end that is pivotally connected to a cross member and the second segment includes a proximal forked end that is pivotally connected to the cross member, the cross member pivotally coupling the second segment to the first segment to form the pivoting joint.

6. The hanger assembly of claim 1 , wherein the second segment includes a distal end that is pivotally connected to a swivel, and the first segment includes a distal forked end that is pivotally connected to a cross member that passes through the swivel to form the pivoting joint.

7. The hanger assembly of claim 1 , wherein the first segment includes a distal end that is pivotally connected to a swivel, and the second segment includes a proximal forked end that is pivotally connected to a cross member that passes through the swivel to form the pivoting joint.

8. A hanger assembly for coupling a heat shield liner to a case, the hanger assembly comprising:
a pivoting joint coupling a first segment to a second segment, the first segment being coupled to the heat shield liner by a liner attachment assembly, the second segment being coupled to the case by a case attachment assembly;
at least one of the liner attachment assembly and the case attachment assembly permitting translation movement of the first segment or the second segment, respectively, with respect to the case,
wherein the case attachment assembly includes an annular outer bushing passing through and connected to the case, the annular outer bushing accommodates an annular inner bushing, the annular inner bushing is coupled to a fastener that couples the annular inner bushing to the second segment, the annular inner bushing is spaced apart from the annular outer bushing to define an annular gap between the annular outer bushing and the annular inner bushing that permits translational movement of the second segment and the fastener with respect to the annular outer bushing and the case.

9. The hanger assembly of claim 8 , wherein the fastener includes a distal head and a proximal threaded section that couples the annular inner bushing to the second segment, the annular inner bushing is longer than the annular outer bushing to provide at least one clearance gap between the distal head of the fastener and the annular outer bushing that permits translational movement of the second segment and the fastener with respect to the annular outer bushing and the case.

10. The hanger assembly of claim 8 , wherein the fastener includes a distal head and a proximal threaded section that couples the annular inner bushing to the second segment, the fastener passing through a washer that is trapped between the distal head and the annular inner bushing, the annular inner bushing being longer than the annular outer bushing to provide at least one clearance gap between the washer and the annular outer bushing that permits translational movement of the second segment and the fastener with respect to the annular outer bushing and the case.

11. The hanger assembly of claim 8 , wherein the liner attachment assembly includes a stud connected to the heat shield liner and threadably connected to the first segment.

12. The hanger assembly of claim 8 , wherein the first segment includes a distal forked end that is pivotally connected to a cross member and the second segment includes a proximal forked end that is pivotally connected to the cross member, the cross member pivotally coupling the second segment to the first segment to form the pivoting joint.

13. The hanger assembly of claim 8 , wherein the second segment includes a distal end that is pivotally connected to a swivel, and the first segment includes a distal forked end that is pivotally connected to a cross member that passes through the swivel to form the pivoting joint.

14. The hanger assembly of claim 8 , wherein the first segment includes a distal end that is pivotally connected to a swivel, and the second segment includes a proximal forked end that is pivotally connected to a cross member that passes through the swivel to form the pivoting joint.

15. A hanger assembly for coupling a heat shield liner to a case, the hanger assembly comprising:
a pivoting joint coupling a first segment to a second segment, the first segment being coupled to the heat shield liner by a liner attachment assembly, the second segment being coupled to the case by a case attachment assembly;
at least one of the liner attachment assembly and the case attachment assembly permitting translational movement of the first segment or the second segment, respectively, with respect to the case,
wherein the case attachment assembly includes a washer plate disposed opposite the case from the second segment, the washer plate including a slot and at least one opening, the washer plate being connected to the case by at least one stud that is connected to the case and passes through the at least one opening, the second segment being connected to the case by a bolt having a proximal threaded end connected to the second segment and a distal head that is slidably disposed above the slot of the washer plate to permit translational movement of the second segment and the bolt along the slot.

16. The hanger assembly of claim 15 further comprising: a cover disposed over the washer plate with the washer plate being disposed between the cover and the case, the distal head being disposed between the washer plate and the cover, and the cover being spaced apart from the distal head to permit translational movement of the

Assignees

• United Technologies Corp

Inventors

• Preston Lon H

Classifications

• Y02T50/675

  Cross-Sectional Technologies · mapped topic

• B23P15/00

  Making specific metal objects by operations not covered by a single other subclass or a group in this subclass · CPC title

• F05D2230/642

  using maintaining alignment while permitting differential dilatation · CPC title

• F02C7/20

  Mounting or supporting of plant; Accommodating heat expansion or creep · CPC title

• F02K1/822

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