Geared gas turbine engine with oil deaerator

Patent metadata

Field	Value
Publication number	US-9976490-B2
Application number	US-201514737670-A
Country	US
Kind code	B2
Filing date	Jun 12, 2015
Priority date	Jul 1, 2014
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A gas turbine engine comprises a fan drive turbine for driving a gear reduction. The gear reduction drives a fan rotor. A lubrication system supplies oil to the gear reduction. The lubrication system includes a lubricant pump supplying a mixed air and oil to a deaerator inlet. The deaerator includes a separator that for separating oil, and delivering separated air to an air outlet, and for delivering separated oil back into an oil tank. The separator includes a member having lubricant flow paths on both of two opposed sides. A method of designing a gas turbine engine is also disclosed.

First claim

The invention claimed is:

1. A gas turbine engine comprising:
a fan drive turbine for driving a gear reduction, said gear reduction for driving a fan rotor;
a lubrication system for supplying oil to said gear reduction, the lubrication system including a lubricant pump supplying a mixed air and oil to a deaerator inlet, said deaerator including a separator for separating oil, and delivering separated air to an air outlet, and for delivering separated oil back into an oil tank, with said separator including a member having lubricant flow paths on both of two opposed sides; and
wherein said separator includes a scroll spiraling from said inlet to a deaerator exit.

2. The gas turbine engine as set forth in claim 1 , wherein said exit includes a plurality of holes in a shell.

3. The gas turbine engine as set forth in claim 1 , wherein a deaerator exit delivers oil into said oil tank at least 2 inches (5.08 centimeters) beneath a freestanding oil level within the tank.

4. A method of designing a gas turbine engine comprising:
providing a fan drive turbine for driving a gear reduction, said gear reduction for driving a fan rotor; and
providing a lubrication system for supplying oil to said gear reduction, with an oil tank, the lubrication system including a lubricant pump;
supplying a mixed air and oil to a deaerator inlet, said deaerator including a separator for separating oil, and delivering separated air to an air outlet, and delivering separated oil back into an oil tank, with said lubricant separator including a member having lubricant flow paths on both of two opposed sides; and
wherein said flow separator includes a scroll spiraling from said inlet to a deaerator exit.

5. The method as set forth in claim 4 , wherein said separator is at an intermediate position in said inlet.

6. The method as set forth in claim 4 , wherein said air outlet has a tube extending downwardly into a deaerator shell.

7. The method as set forth in claim 4 , wherein said separator is at an intermediate position in said inlet.

Assignees

• Sheridan William G
• United Technologies Corp

Inventors

• Sheridan William G

Classifications

• F05D2260/40311

  of the epicyclical, planetary or differential type · CPC title

• F02C7/36 Primary

  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

• F05D2260/608

  Aeration, ventilation, dehumidification or moisture removal of closed spaces · CPC title

• F02C3/04

  having a turbine driving a compressor (power transmission arrangements F02C7/36; control of working fluid flow F02C9/16) · CPC title

• F02C7/06 Primary

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