Fluid delivery system for a gas turbine engine

Patent metadata

Field	Value
Publication number	US-9726040-B2
Application number	US-201514670848-A
Country	US
Kind code	B2
Filing date	Mar 27, 2015
Priority date	Mar 27, 2015
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A fluid delivery assembly for delivering fluid to a component in a gas turbine engine includes a rotating shaft having a central bore and at least one fluid exhaust in communication with the central bore for centrifugally expelling fluid, and a delivery scoop disposed around the rotating shaft and spaced apart from the rotating shaft by an annular gap. The delivery scoop includes an annular body having at least one impingement surface facing the at least one fluid exhaust and configured to scoop the fluid expelled by the at least one fluid exhaust. The impingement surface has at least one outlet for delivering the scooped fluid to the component. A method of delivering pressurised fluid in a fluid system is also presented.

First claim

The invention claimed is:

1. An oil scoop to be disposed around a rotating shaft of a gas turbine engine and adapted to receive centrifugally expelled fluid from the rotating shaft, the delivery scoop comprising:
an annular body having a generally U-shape cross-section, an inner surface of the annular body including a plurality of circumferentially disposed impingement surfaces circumferentially separated by a plurality of vanes extending radially inwardly from the annular body, a plurality of independent fluid channels being defined by adjacent vanes and the impingement surfaces disposed between the adjacent vanes, the independent fluid channels having corresponding slot outlets defined in an axial end wall of the annular body, the axial end wall closing otherwise the independent fluid channels.

2. The oil scoop of claim 1 , wherein each of the slot outlets is arcuate.

3. The oil scoop of claim 1 , wherein the at least one impingement surface has a cross-sectional profile being curved axially.

4. A fluid delivery assembly for delivering fluid to a component in a gas turbine engine, the fluid delivery assembly comprising:
a rotating shaft having a central bore and at least one fluid exhaust in communication with the central bore for centrifugally expelling fluid; and
a delivery scoop disposed around the rotating shaft and spaced apart from the rotating shaft by an annular gap, the delivery scoop including an annular body having at least one impingement surface facing the at least one fluid exhaust and configured to scoop the fluid expelled by the at least one fluid exhaust, the impingement surface having at least one outlet for delivering the scooped fluid to the component.

5. The fluid delivery assembly of claim 4 , wherein the at least one impingement surface is configured to redirect the fluid expelled by the at least one fluid exhaust.

6. The fluid delivery assembly of claim 4 , wherein the at least one fluid exhaust is at least one nozzle.

7. The fluid delivery assembly of claim 4 , wherein a motion of the delivery scoop is independent from a rotation of the shaft.

8. The fluid delivery assembly of claim 4 , wherein the delivery scoop is static relative to the rotating shaft.

9. The fluid delivery assembly of claim 4 , wherein the at least one impingement surface has a cross-sectional profile being curved axially.

10. The fluid delivery assembly of claim 4 , wherein the at least one outlet includes at least one arcuate slot.

11. The fluid delivery assembly of claim 4 , further comprising at least one vane extending inwardly radially from the annular body of the delivery scoop.

12. The fluid delivery assembly of claim 4 , wherein the at least one impingement surface includes a plurality of impingement surfaces, and the at least one outlet includes a plurality of outlets, the plurality of outlets being associated with the plurality of impingement surfaces, and
further comprising a plurality of vanes extending inwardly radially from the annular body, the plurality of vanes separating circumferentially each set of impingement surface and associated outlet.

13. The fluid delivery assembly of claim 4 , wherein the delivery scoop is connected to an outer race of a bearing and the rotating shaft is connected to an inner race of the bearing.

14. The fluid delivery assembly of claim 4 , wherein the at least one fluid exhaust includes a plurality of fluid exhaust circumferentially distributed about the rotating shaft.

15. The fluid delivery assembly of claim 4 , wherein the fluid expelled by the at least one fluid exhaust is a lubricant.

16. A method of delivering pressurised fluid in a fluid system, the method comprising:
centrifugally expelling fluid from a central bore of a rotating shaft;
scooping the fluid with a delivery scoop located about the rotating shaft such that the fluid conserves at least partially its kinetic energy; and
directing the fluid with its kinetic energy to a component adjacent to an outlet of the delivery scoop.

17. The method of claim 16 , wherein scooping the fluid comprises directing the fluid away from a direction of the fluid expelled centrifugally from the rotating shaft.

18. The method of claim 16 , further comprising delivering the fluid expelled from the outlets of the delivery scoop to a closed cavity to convert the fluid's kinetic energy into static pressure.

19. The method of claim 16 , wherein scooping the fluid comprises flowing the fluid expelled from the rotating shaft on a plurality of fluidly independent channels of the delivery scoop.

20. The method of claim 16 , wherein expelling the fluid from the delivery scoop comprises expelling the fluid through slots of the delivery scoop.

Assignees

• Pratt & Whitney Canada

Inventors

• Gekht Eugene
• Legare Pierre-Yves
• Haslam-Jones Thomas Francis

Classifications

• F16N7/363

  Centrifugal lubrication · CPC title

• F05D2250/15

  spiral · CPC title

• F01D25/18 Primary

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

• F05D2260/98

  Lubrication · CPC title

• F01D25/164

  Flexible supports; Vibration damping means associated with the bearing · CPC title