Planetary gear system arrangement with auxiliary oil system

Patent metadata

Field	Value
Publication number	US-9677420-B2
Application number	US-201414474869-A
Country	US
Kind code	B2
Filing date	Sep 2, 2014
Priority date	Oct 12, 2010
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A gas turbine engine includes a fan, a speed reduction device driving the fan and a lubrication system for lubricating components across a rotation gap. The lubrication system includes a lubricant input. A stationary first bearing receives lubricant from the lubricant input and has a first race in which lubricant flows and a second race. A second bearing for rotation is within the first bearing including a first opening in registration with the first race such that lubricant may flow from the first race through the first opening into a first conduit. There is a rotating carrier for supporting at least one planetary gear. The second bearing extends from the rotating carrier about an axis. A first spray bar is disposed on the carrier. The second bearing has a second opening in registration with the second race and a second conduit for passing lubricant to the spray bar.

First claim

What is claimed is:

1. A gas turbine engine comprising:
a fan;
a speed reduction device driving said fan;
a lubrication system for lubricating components across a rotation gap, the lubrication system including a lubricant input, a stationary first bearing receiving lubricant from said lubricant input and having a first race in which lubricant flows, and a second bearing for rotation within said first bearing, said second bearing having a first opening in registration with said first race such that lubricant may flow from said first race through said first opening into a first conduit;
a rotating carrier for supporting at least one planetary gear wherein said second bearing extends from said rotating carrier about an axis;
a first spray bar disposed on said carrier; and
said first bearing has a second race and said second bearing has a second opening in registration with said second race and a second conduit for passing lubricant to said spray bar.

2. The gas turbine engine of claim 1 , further comprising a first compressor rotor and a second compressor rotor.

3. The gas turbine engine of claim 2 , further comprising a first turbine rotor and a second turbine rotor, and wherein said first turbine rotor drives said second compressor rotor as a high spool, and wherein said second turbine rotor drives said first compressor rotor as part of a low spool.

4. The gas turbine engine of claim 3 , wherein said fan and said first compressor rotor rotate in the same direction.

5. The gas turbine engine of claim 4 , wherein said high spool operates at higher pressures than said low spool.

6. The gas turbine engine of claim 5 , wherein said first bearing and said second bearing are centered about a common axis.

7. The gas turbine engine of claim 1 , wherein said speed reduction device includes an epicyclic gear train.

8. The gas turbine engine of claim 7 , wherein said epicyclic gear train includes a sun gear, a plurality of planetary gears configured to rotate about the sun gear, a stationary ring gear, and a carrier attached to said fan.

Assignees

• United Technologies Corp

Inventors

• Mccune Michael E
• Sheridan William G
• Portlock Lawrence E

Classifications

• 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

• F02C7/06

  Arrangements of bearings (bearings F16C); Lubricating ({of turbo machines F01D25/18; of machines or} engines in general F01M) · CPC title

• F01D25/16 Primary

  Arrangement of bearings; Supporting or mounting bearings in casings (bearings per se F16C) · CPC title

• F05D2260/40311

  of the epicyclical, planetary or differential type · CPC title

• F02C3/10

  with another turbine driving an output shaft but not driving the compressor · CPC title