Sleeve for oil service tubes

Patent metadata

Field	Value
Publication number	US-11415015-B2
Application number	US-201916661512-A
Country	US
Kind code	B2
Filing date	Oct 23, 2019
Priority date	Oct 23, 2019
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

An assembly for a gas turbine engine has a support structure and a tube configured to circulate lubricant and mounted to the support structure, a sacrificial sleeve extending around the tube and disposed between the support structure and the tube, the sacrificial sleeve welded to the support structure. A method of mounting a fluid carrying tube to a support structure in a gas turbine engine is provided.

First claim

The invention claimed is:

1. An assembly for a gas turbine engine comprising a support structure and a tube configured to circulate lubricant and mounted to the support structure, a sacrificial sleeve extending around the tube and disposed between the support structure and the tube, the sacrificial sleeve welded to the support structure, the sacrificial sleeve extending circumferentially around the tube relative to a longitudinal axis of the tube but for a slot, the sacrificed sleeve having a total length defined between a first axial end and a second axial end opposite the first axial end, a shape of the sacrificial sleeve matching a shape of the tube along a major portion of the total length of the sacrificial sleeve defined between the first axial end and the second axial end.

2. The assembly of claim 1 , wherein the sacrificial sleeve is welded to the support structure via a fillet weld.

3. The assembly of claim 1 , wherein the slot extends axially from the first axial end of the sacrificial sleeve to the second axial end of the sacrificial sleeve opposite the first axial end.

4. The assembly of claim 1 , wherein the sacrificial sleeve is secured to the tube solely at the first axial end of the sacrificial sleeve, the second axial end of the sacrificial sleeve being free of securement between the sacrificial sleeve and the tube.

5. The assembly of claim 4 , wherein a fillet weld secures the sacrificial sleeve to the tube at the axial end.

6. The assembly of claim 1 , wherein the sacrificial sleeve protrudes on both sides of the support structure.

7. The assembly of claim 1 , wherein the sacrificial sleeve is secured to the support structure on both sides of the support structure via fillet welds.

8. The assembly of claim 1 , wherein an inner diameter of the sacrificial sleeve is less than an outer diameter of the tube before the sacrificial sleeve is disposed around the tube such that a tight fit is provided between the sacrificial sleeve and the tube.

9. The assembly of claim 1 , wherein the sacrificial sleeve is welded to the support structure via a fillet weld, the slot being free of the fillet weld.

10. A gas turbine engine comprising the assembly of claim 1 .

11. The gas turbine engine of claim 10 , wherein the sacrificial sleeve is welded to the support structure via a fillet weld, the slot being free of the fillet weld.

12. A method of mounting a fluid carrying tube to a support structure in a gas turbine engine, the method comprising:
disposing a sacrificial sleeve around the fluid carrying tube, the sacrificial sleeve extending circumferentially around the fluid carrying tube relative to a longitudinal axis of the fluid carrying tube but for a slot, the sacrificed sleeve having a total length defined between a first axial end and a second axial end opposite the first axial end, a shape of the sacrificial sleeve matching a shape of the tube along a major portion of the total length of the sacrificial sleeve;
inserting the fluid carrying tube through the support structure such that the sacrificial sleeve is located between the support structure and the fluid carrying tube; and
welding the sacrificial sleeve to the support structure.

13. The method of claim 12 , comprising disposing the sacrificial sleeve around the fluid carrying tube before the fluid carrying tube is inserted through the support structure.

14. The method of claim 12 , wherein welding the sacrificial sleeve to the support structure includes disposing a weld joint around the sacrificial sleeve and leaving the slot of the sacrificial sleeve longitudinally extending along the total length of the sacrificial sleeve free of the weld joint.

15. The method of claim 12 , wherein disposing the sacrificial sleeve around the fluid carrying tube includes:
increasing a width of the slot of the sacrificial sleeve until the width is greater than an outer diameter of the fluid carrying tube;
inserting the fluid carrying tube within the sacrificial sleeve via the slot; and
tightening the sacrificial sleeve around the fluid carrying tube.

16. The method of claim 15 , wherein tightening the sacrificial sleeve includes releasing edges of the sacrificial sleeve.

17. The method of claim 15 , wherein tightening the sacrificial sleeve around the fluid carrying tube includes decreasing the width of the slot.

18. The method of claim 12 , further comprising securing the sacrificial sleeve to the fluid carrying tube solely at the first axial end of the sacrificial sleeve.

19. The method of claim 18 , wherein securing the sacrificial sleeve to the fluid carrying tube includes welding the sacrificial sleeve to the fluid carrying tube at the first axial ends.

Assignees

• Pratt & Whitney Canada

Inventors

• Fryer Michael A
• Lanzino Joe

Classifications

• F05D2220/32

  in gas turbines · CPC title

• F01D25/18

  Lubricating arrangements (of machines or engines in general F01M) · CPC title

• F01D9/065 Primary

  Fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-, or sealing fluids (see also F01D25/16, F01D25/24 and F01D25/26) · CPC title

• F05D2260/98

  Lubrication · CPC title