Aircraft engine cleaning system

Patent metadata

Field	Value
Publication number	US-10981674-B2
Application number	US-201916438925-A
Country	US
Kind code	B2
Filing date	Jun 12, 2019
Priority date	Aug 4, 2014
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

A method for performing a cleaning cycle on a turbine engine mounted to an airframe includes conducting a cleaning agent from a cleaning agent supply into the gas turbine engine. The method further includes conducting compressed air from a cleaning air supply into the gas turbine engine to dry motor the gas turbine engine while the cleaning agent is conducted from the cleaning agent supply into the gas turbine engine.

First claim

What is claimed is:

1. A method comprising:
providing an aircraft having an airframe and a gas turbine engine coupled with the airframe for movement with the airframe, a cleaning air supply located external to the aircraft and the gas turbine engine and configured to provide compressed air to drive dry motoring of the gas turbine engine, and a cleaning agent supply located external to the aircraft;
conducting a cleaning agent from the cleaning agent supply into the gas turbine engine; and
conducting continuously compressed air free of the cleaning agent from the cleaning air supply into the gas turbine engine to drive dry motoring of the gas turbine engine constantly and cause a compressor of the gas turbine engine to rotate for a predetermined cleaning cycle time while the cleaning agent is conducted from the cleaning agent supply into the gas turbine engine.

2. The method of claim 1 , further comprising coupling a first hose between the cleaning agent supply and the gas turbine engine and coupling a second hose between the cleaning air supply and the gas turbine engine.

3. The method of claim 1 , further comprising coupling a first hose between the cleaning agent supply and a supply connector included in the gas turbine engine.

4. The method of claim 1 , wherein the aircraft further comprises a starter air supply sized to constantly dry motor the gas turbine engine for a predetermined starting cycle and the predetermined starting cycle is shorter than the predetermined cleaning cycle.

5. The method of claim 4 , wherein the starter air supply is configured to conduct air to the gas turbine engine to cause the compressor to rotate.

6. The method of claim 1 , further comprising coupling the cleaning agent supply to a cleaning agent supply connector included in the gas turbine engine.

7. The method of claim 6 , wherein the cleaning air supply and the cleaning agent supply are mounted to a transport vehicle for movement together relative to the aircraft.

8. The method of claim 1 , wherein the cleaning air supply is sized to provide enough compressed air to constantly drive dry motoring of the gas turbine engine for the entirety of the predetermined cleaning cycle.

9. The method of claim 8 , wherein the method includes moving the cleaning air supply on a transport vehicle relative to the gas turbine engine.

10. The method of claim 9 , wherein the aircraft further comprises a starter sized to constantly dry motor the gas turbine engine for a predetermined starting cycle and the predetermined starting cycle is shorter than the predetermined cleaning cycle.

11. The method of claim 10 , wherein the predetermined cleaning cycle is between about thirty and about ninety minutes.

12. The method of claim 9 , further comprising coupling a first hose between the cleaning agent supply and the gas turbine engine and coupling a second hose between the cleaning air supply and the gas turbine engine.

13. The method of claim 1 , wherein the transport vehicle is one of an automobile, work cart, and trailer.

14. The method of claim 1 , wherein the method includes mounting the cleaning air supply on a transport vehicle for movement relative to the gas turbine engine.

Assignees

• Rolls Royce Corp

Inventors

• Griffiths George F
• Heggere Prahlad R D
• Green Jeffrey A

Classifications

• B64F5/30 Primary

  Cleaning aircraft · CPC title

• F05D2220/323

  for aircraft propulsion, e.g. jet engines · CPC title

• B64D13/02

  the air being pressurised · CPC title

• B64D27/20

  within, or attached to, fuselages · CPC title

• F01D25/002

  Cleaning of turbomachines · CPC title