Enclosed jacking insert

Patent metadata

Field	Value
Publication number	US-2016208652-A1
Application number	US-201514600239-A
Country	US
Kind code	A1
Filing date	Jan 20, 2015
Priority date	Jan 20, 2015
Publication date	Jul 21, 2016
Grant date	—

Abstract

A case assembly is provided. The case assembly comprises a first flange and a spot face in the first flange. The spot face has a D-shaped perimeter. A jacking insert is disposed in the spot face and has a D-shaped geometry. A threaded cylinder extends from the jacking insert into the first flange. A jacking insert is also provided. The jacking insert comprises a flat portion having a D-shaped geometry and a cylindrical portion having an internal thread configured to interface with a bolt.

First claim

What is claimed is:

1 . A case assembly, comprising:
a flange; a recess in the flange defined by a spot face surrounded by a D-shaped wall; a jacking insert comprising a back plate disposed in the recess and having a D-shaped geometry; and a threaded cylinder extending from the back plate into the flange.

2 . The case assembly of claim 1 , further comprising a second flange that is snap fitted to the flange with the jacking insert at least partially between the flange and the second flange.

3 . The case assembly of claim 2 , further comprising a bolt configured to interface with the threaded cylinder.

4 . The case assembly of claim 3 , wherein the bolt is configured to press the flange and the second flange away from one another in response to the bolt entering the jacking insert.

5 . The case assembly of claim 1 , wherein the D-shaped wall comprises a complete hoop around the back plate.

6 . The case assembly of claim 1 , wherein the D-shaped wall is configured to limit rotation of the jacking insert.

7 . The case assembly of claim 1 , further comprising a bulkhead pressed against the flange and covering the spot face.

8 . The case assembly of claim 7 , wherein a bolt is configured to pass through the jacking insert and an opening defined by the bulkhead.

9 . A gas turbine engine, comprising:
a static frame component comprising a first flange; a low-pressure compressor aft of the static frame component; a case around the low-pressure compressor and aft of the static frame component, the case comprising a second flange; and a jacking insert between the first flange and the second flange.

10 . The gas turbine engine of claim 9 , further comprising a recess defined by at least one of the first flange and the second flange with the jacking insert disposed in the recess.

11 . The gas turbine engine of claim 10 , wherein the recess is defined by a contoured sidewall matching a geometry of the jacking insert.

12 . The gas turbine engine of claim 11 , wherein the geometry of the jacking insert is D-shaped.

13 . The gas turbine engine of claim 9 , further comprising a threaded cylinder extending from the jacking insert into the first flange.

14 . The gas turbine engine of claim 13 , wherein the second flange is snap fitted to the first flange.

15 . The gas turbine engine of claim 14 , further comprising a bolt configured to interface with the threaded cylinder.

16 . The gas turbine engine claim 15 , wherein the bolt is configured to press the first flange away from the second flange in response to the bolt entering the jacking insert.

17 . The gas turbine engine of claim 10 , wherein the flange comprises a complete hoop around the recess.

18 . A jacking insert, comprising:
a back plate having a D-shaped geometry; and a cylindrical portion having an internal thread configured to interface with a bolt.

19 . The jacking insert of claim 18 , wherein the D-shaped geometry is configured to interact with a contoured wall to limit rotation of the jacking insert.

20 . The jacking insert of claim 18 , wherein the D-shaped geometry comprises a round portion and a square portion.

Assignees

• United Technologies Corp

Inventors

• Rogers Daniel S
• Milks Stephen W
• Feigleson Steven J

Classifications

• F01D25/246

  Fastening of diaphragms or stator-rings · CPC title

• F01D9/042

  fixing blades to stators (fixing stator-rings in the casing or to each other F01D25/246) · CPC title

• F16B37/122

  Threaded inserts, e.g. "rampa bolts" · CPC title

• F01D25/243 Primary

  Flange connections; Bolting arrangements (F01D25/265 takes precedence) · CPC title

• F01D5/005

  Repairing methods or devices · CPC title