Geared architecture gas turbine engine with oil scavenge

Patent metadata

Field	Value
Publication number	US-2016146102-A1
Application number	US-201414899646-A
Country	US
Kind code	A1
Filing date	Aug 22, 2014
Priority date	Aug 30, 2013
Publication date	May 26, 2016
Grant date	—

Abstract

A gas turbine engine includes a geared architecture with a multiple of intermediate gears, and a baffle with an oil scavenge scoop adjacent to each of the multiple of intermediate gears. A geared architecture and method are also disclosed.

First claim

1 . A gas turbine engine, comprising:
a geared architecture with a multiple of intermeshed gears; and a baffle including a multiple of oil jets that direct oil toward a gear mesh between one of the multiple of intermeshed gears and an oil scavenge scoop.

2 . The gas turbine engine as recited in claim 1 , wherein each of the multiple of intermeshed gears and the baffles are mounted to a rotational carrier.

3 . The gas turbine engine as recited in claim 1 , wherein the oil scavenge scoop includes a scavenge passage with an inner scavenge passage wall, an outer scavenge passage wall and a radial outer scavenge passage wall therebetween.

4 . The gas turbine engine as recited in claim 3 , wherein the radial outer scavenge passage wall defines a ramp surface.

5 . The gas turbine engine as recited in claim 4 , further comprising an exit through a baffle end wall adjacent to the radial outer passage.

6 . The gas turbine engine as recited in claim 5 , wherein the radial outer scavenge passage wall defines a peak.

7 . The gas turbine engine as recited in claim 6 , further comprising a first exit through a first baffle end wall adjacent to the radial outer passage and a second exit through a second baffle end wall adjacent to the radial outer passage.

8 . The gas turbine engine as recited in claim 3 , further comprising a flow splitter between the inner scavenge passage wall and the outer scavenge passage wall.

9 . The gas turbine engine as recited in claim 8 , wherein the inner scavenge passage wall and the outer scavenge passage wall define curved surfaces.

10 . The gas turbine engine as recited in claim 9 , wherein the inner scavenge passage wall and the outer scavenge passage wall generally follow a curved outer wall that generally follows a diameter of the adjacent intermediate gear.

11 . The gas turbine engine as recited in claim 10 , wherein the inner scavenge passage wall is of a different length than the outer scavenge passage wall.

12 - 13 . (canceled)

14 . The gas turbine engine as recited in claim 1 , wherein the geared architecture includes a planetary gear system.

15 . The gas turbine engine as recited in claim 14 , including a turbine section including a fan drive turbine coupled to drive a fan through the geared architecture and at least one other turbine forward of the fan drive turbine.

16 . The gas turbine engine as recited in claim 15 , wherein the geared architecture includes an efficiency greater than about 98%.

17 . The gas turbine engine as recited in claim 1 , wherein the gas turbine engine is a high bypass engine having a bypass ratio greater than about ten (ten).

18 . The gas turbine engine as recited in claim 15 , wherein the fan includes a fan pressure ratio of less than about 1.45.

19 . A geared architecture for a gas turbine engine, comprising:
a sun gear defined along an axis; a ring gear rotationally fixed around the axis; a multiple of planet gears in meshed engagement with the sun gear and the ring gear; a carrier for rotating about the axis and for rotationally supporting the multiple of planet gears; and a multiple of baffles mounted to the carrier, each of the baffles includes a multiple of oil nozzles directed toward a gear interface between any of the ring gear, multiple of planet gears and the sun gear and an oil scavenge scoop upstream of the multiple of oil nozzles with respect to the gear mesh.

20 . The geared architecture as recited in claim 19 , wherein the oil scavenge scoop includes a scavenge passage with an inner scavenge passage wall, an outer scavenge passage wall and a radial outer scavenge passage wall therebetween.

21 . The geared architecture as recited in claim 20 , wherein the radial outer scavenge passage wall defines a ramp surface toward the exit.

22 . The geared architecture as recited in claim 20 , wherein the radial outer scavenge passage wall defines a peak.

23 . The geared architecture as recited in claim 20 , further comprising a flow splitter between the inner scavenge passage wall and the outer scavenge passage wall.

24 . The geared architecture as recited in claim 20 , wherein the inner scavenge passage wall is of a different length than the outer scavenge passage wall.

25 . The geared architecture as recited in claim 19 , wherein the geared architecture provides a speed reduction between a turbine section and a fan section of greater than about 2.3.

26 - 30 . (canceled)

31 . The gas turbine engine as recited in claim 1 , wherein the oil scavenge scoop is adjacent to each of the multiple of intermeshed gears.

32 . The geared architecture as recited in claim 19 , wherein the oil scavenge scoop is upstream of the multiple of oil nozzles with respect to the gear interface.

Assignees

• United Technologies Corp

Inventors

• Mccune Michael E
• Nado Zachary R

Classifications

• F02C3/107 Primary

  with two or more rotors connected by power transmission · CPC title

• F02C7/36

  Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user ({F02C3/107 - F02C3/13 and} F02C7/32 take precedence; couplings for transmitting rotation F16D; gearing in general F16H) · CPC title

• F05D2260/4031

  as in toothed gearing · CPC title

• F16H57/0482

  Gearings with gears having orbital motion · CPC title

• F16H57/0479

  Gears or bearings on planet carriers · CPC title