Tool kit and method for decoupling cross-fire tube assemblies in gas turbine engines

Patent metadata

Field	Value
Publication number	US-10837644-B2
Application number	US-201615278058-A
Country	US
Kind code	B2
Filing date	Sep 28, 2016
Priority date	Sep 28, 2016
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A tool kit for decoupling a telescoping tube from a first liner of a gas turbine engine is disclosed. The tool kit includes a base plate coupled to a combustor casing. A post extends outward from the base plate into a combustion chamber defined by the liner. A plunger slidably mounts to the post and is slidable between an extended position and a retracted position. A lever arm pivotably couples to the post and the plunger. Pivoting the lever arm in a first direction slides the plunger to the extended position to decouple the telescoping tube from the liner. A retaining clip couples to the combustor casing and extends into an annular plenum at least partially defined between the liner and the combustor casing. The retaining clip defines a notch that receives the telescoping tube after the plunger assembly decouples the telescoping tube from the liner.

First claim

What is claimed is:

1. A tool kit for decoupling a telescoping tube from a liner of a component, the tool kit comprising:
a plunger assembly comprising:
a base plate that couples to a casing;
a post extending outward from the base plate into a chamber at least partially defined by the liner, wherein the post includes a bushing plate that defines a bushing plate aperture extending therethrough;
a plunger slidably received within the bushing plate aperture, the plunger slidable relative to the post between an extended position and a retracted position; and
a lever arm pivotably coupled to the post and to the plunger, wherein pivoting the lever arm in a first direction slides the plunger within the bushing plate aperture relative to the post to the extended position to decouple the telescoping tube from the liner; and

a retaining clip that couples to the casing and extends into an annular plenum at least partially defined between the liner and the casing, the retaining clip defining a notch that receives the telescoping tube after the plunger assembly decouples the telescoping tube from the liner.

2. The tool kit of claim 1 , wherein the plunger assembly comprises a pin block coupled to the base plate, the pin block defining a pin block aperture extending therethrough, wherein the lever arm defines a lever arm aperture extending therethrough, and wherein a pin extends through the pin block aperture and the lever arm aperture to prevent the lever arm from sliding from the extended positioned to the retracted position or from the retracted position to the extended position.

3. The tool kit of claim 1 , wherein one or more connectors couple at least one of the plunger assembly and the retaining clip to the casing, each connector comprising a stud, a knob, and a pin that couples the knob to the stud.

4. The tool kit of claim 1 , wherein the post comprises a first side plate coupled to the base plate and a second side plate coupled to the base plate and spaced apart from the first side plate, the bushing plate coupled to the first side plate and the second side plate and spaced apart from the base plate.

5. The tool kit of claim 1 , wherein the base plate is arcuate and extends over a portion of the combustion chamber.

6. The tool kit of claim 1 , wherein pivoting the lever arm in a second direction slides the plunger within the bushing plate aperture relative to the post to the retracted position.

7. A system for decoupling telescoping tubes from liners of a gas turbine engine, the system comprising:
a liner that at least partially defines a combustion chamber;
a combustor casing surrounding at least a portion of the liner and spaced apart from the liner, the combustor casing and the liner at least partially defining an annular plenum therebetween;
a telescoping tube extending through the combustor casing and coupled to the liner; and
a plunger assembly comprising:
a base plate coupled to the combustor casing;
a post extending outward from the base plate into the combustion chamber, wherein the post includes a bushing plate that defines a bushing plate aperture extending therethrough;
a plunger positioned in the combustion chamber and slidably received by the bushing plate aperture, the plunger aligned with the telescoping tube and slidable relative to the post between an extended position and a retracted position; and
a lever arm pivotably coupled to the post and to the plunger, wherein pivoting the lever arm in a first direction slides the plunger within the brushing plate aperture relative to the post and into contact with the telescoping tube and into the extended position to decouple the telescoping tube from the liner; and

a retaining clip coupled to the combustor casing and extending into the annular plenum, the retaining clip defining a notch that receives the telescoping tube after the plunger assembly decouples the telescoping tube from the liner.

8. The system of claim 7 , wherein the plunger assembly comprises a pin block coupled to the base plate, the pin block defining a pin block aperture extending therethrough, wherein the lever arm defines a lever arm aperture extending therethrough, and wherein a pin extends through the pin block aperture and the lever arm aperture to prevent the lever arm from sliding from the extended positioned to the retracted position or from the retracted position to the extended position.

9. The system of claim 7 , wherein one or more connectors couple at least one of the plunger assembly and the retaining clip to the combustor casing, each connector comprising a stud, a knob, and a pin that couples the knob to the stud.

10. The system of claim 7 , wherein the post comprises a first side plate coupled to the base plate and a second side plate coupled to the base plate and spaced apart from the first side plate, wherein the bushing plate is coupled to the first side plate and the second side plate and spaced apart from the base plate.

11. The system of claim 7 , wherein the base plate is arcuate and extends over a portion of the combustion chamber.

12. The system of claim 7 , wherein pivoting the lever arm in a second direction slides the plunger to the retracted position.

13. A method for decoupling a telescoping tube from a liner of a combustor of a gas turbine engine, the method comprising:
inserting a plunger assembly partially into a combustion chamber defined by the liner, the plunger assembly comprising a base plate, a post extending outward from the base plate into the combustion chamber, the post including a bushing plate that defines a bushing plate aperture extending therethrough, a plunger positioned in the combustion chamber and slidably received by the bushing plate aperture, the plunger aligned with the telescoping tube and slidable relative to the post between an extended position and a retracted position, and a lever arm pivotably coupled to the post and to the plunger;
coupling the base plate to the combustor casing;
pivoting the lever arm in a first direction to slide the plunger within the brushing plate aperture relative to the post and into contact with the telescoping tube and into the extended position to decouple the telescoping tube from the liner;
locking the lever arm after the plunger is in the extended position;
inserting a retaining clip into an annular plenum defined between the liner and a combustor casing such that a notch defined by the retaining clip receives the telescoping tube to retain the telescoping tube in a decoupled position; and
coupling the retaining clip to the combustor casing.

14. The method of claim 13 , further comprising:
unlocking the lever arm after coupling the retaining clip to the combustor casing.

15. The method of claim 14 , further comprising:
pivoting the lever arm in a second direction to slide the plunger into a retracted position after unlocking the lever arm.

16. The method of claim 15 , further comprising:
decoupling the plunger assembly from the combustor casing and removing the plunger assembly from the combustion chamber after sliding the plunger into the retracted position.

17. The method of claim 16 , further comprising:
removing the liner from the combustor.

18. The method of claim 13 , wherein locking the lever arm comprises inserting a pin into a pin block aperture defined by a pin block coupled to the base plate and into a lever arm aperture defined by the lever arm.

19. The method of claim 13 , further comprising:
removing a head end of the combustor before inserting the plunger assembly partially

Assignees

• Gen Electric

Inventors

• Gattermeyer Todd James
• Hanson Stuart Craig
• Overby Brandon Taylor

Classifications

• B25B27/02 Primary

  for connecting objects by press fit or detaching same {(B25D1/16 takes precedence)} · CPC title

• F01D25/285

  Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures · CPC title

• F23R2900/00019

  Repairing or maintaining combustion chamber liners or subparts · CPC title

• F23R2900/00017

  Assembling combustion chamber liners or subparts · CPC title

• F05D2230/72

  Maintenance · CPC title