Gas turbine engine lubrication system

Patent metadata

Field	Value
Publication number	US-10107157-B2
Application number	US-201514713009-A
Country	US
Kind code	B2
Filing date	May 15, 2015
Priority date	May 28, 2014
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

A lubrication system includes a lubrication tank, a gearbox driven pump, an electrically driven pump located in parallel with the gearbox driven pump, and a first control valve for selectively connecting the electrically driven pump or the gearbox driven pump with the lubrication tank.

First claim

What is claimed is:

1. A lubrication system comprising:
a lubrication tank;
a gearbox driven pump;
an electrically driven pump located in parallel with the gearbox driven pump; it 4 a first control valve for selectively connecting the electrically driven pump or the gearbox driven pump with the lubrication tank;
a second control value located downstream of an output to the gearbox driven pump and an output to the electrically driven pump; and
a third control valve located downstream of the second control valve configured to selectively move between a first position for providing lubricant to a speed change mechanism and bearing systems and a second position for providing lubricant only to the speed change mechanism.

2. The lubricant system as recited in claim 1 , wherein the first control valve and the second control valve are configured to selectively move between a first position to allow lubricant only through the gearbox driven pump and a second position to allow lubricant only through the electrically driven pump.

3. The lubrication system as recited in claim 1 , including a third control valve located downstream of the second control valve for selectively directing lubrication between at least one of a speed change mechanism on a gas turbine engine and rotor support bearings on the gas turbine engine.

4. The lubrication system as recited in claim 3 , including a lubrication cooler located downstream of the second control valve and upstream of the third control valve.

5. The lubrication system as recited in claim 1 , wherein the electrically driven pump receives power from a vehicle power distribution control.

6. The lubrication system as recited in claim 5 , wherein the power distribution control is in electrical communication with a first gas turbine engine and a second gas turbine engine.

7. The lubrication system as recited in claim 1 , including a gearbox for driving the gearbox driven pump.

8. The lubrication system as recited in claim 7 , including a tower shaft mechanically connecting the gearbox with a high speed spool.

Assignees

• United Technologies Corp

Inventors

• Roberge Gary D

Classifications

• F01M2001/123

  using two or more pumps · CPC title

• F02C7/06

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

• F01D25/20

  using lubrication pumps · CPC title

• F01M1/12 Primary

  Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10 · CPC title

• F16H57/0439

  using multiple pumps with different power sources or a single pump with different power sources, e.g. one and the same pump may selectively be driven by either the engine or an electric motor · CPC title