Gas turbine engine wash system

Patent metadata

Field	Value
Publication number	US-11313246-B2
Application number	US-201615365070-A
Country	US
Kind code	B2
Filing date	Nov 30, 2016
Priority date	Nov 30, 2016
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

A wash system for a gas turbine engine includes a core turning assembly having a motor configured to be mechanically coupled to the gas turbine engine. The rotor of the core turning assembly is further configured to rotate one or more components of a compressor section or a turbine section of the gas turbine engine at a rotational speed greater than two (2) revolutions per minute and less than five hundred (500) revolutions per minute during washing operations of the gas turbine engine.

First claim

What is claimed is:

1. A wash system for a gas turbine aircraft engine comprising a compressor section, a turbine section, and an accessory gearbox, the wash system comprising:
a core turning assembly comprising a motor mechanically coupled to the gas turbine aircraft engine for rotating one or more components of the compressor section or the turbine section at a rotational speed greater than two (2) revolutions per minute and less than five hundred (500) revolutions per minute during washing operations of the gas turbine aircraft engine, and
a wash fluid line fluidly connected to a location within a core air flowpath of the gas turbine aircraft engine, the wash fluid line comprising one or more of a first wash fluid line oriented adjacent an inlet of the core air flowpath of the gas turbine aircraft engine and a second wash fluid line extending through an inspection hole of the gas turbine aircraft engine,
wherein the motor is mechanically coupled to the accessory gearbox, wherein the accessory gearbox of the gas turbine aircraft engine comprises a plurality of gears;
wherein the accessory gearbox further comprises a plurality of accessory pads that communicate with the plurality of gears and is configured to be coupled to an outer casing of the gas turbine aircraft engine;
wherein the core turning assembly further comprises an offset tool and an adapter, the offset tool coupled to the motor and the adapter, the adapter being coupled to a selected one of the plurality of accessory pads, wherein the adapter is also coupled to a selected one of the plurality of gears other than a starter gear, wherein the selected one of the plurality of gears is coupled to a horizontal driveshaft, wherein the horizontal driveshaft is coupled to a transfer gearbox, wherein the transfer gearbox is coupled to a selected one of the one or more components;
wherein the accessory gearbox is configured to drive multiple accessories of the gas turbine aircraft engine at least in part via the plurality of accessory pads when the gas turbine aircraft engine is operating.

2. The wash system of claim 1 , wherein the motor is mechanically coupled to the horizontal driveshaft through a flexible coupling.

3. The wash system of claim 1 , wherein the motor is a ten (10) horsepower motor or less.

4. The wash system of claim 1 , wherein the wash fluid line is configured to be fluidly connected to a location within at least one of the compressor section or the turbine section of the gas turbine aircraft engine, the wash fluid line configured to provide a wash fluid to at least one of the compressor section or the turbine section during rotation of at least one of the compressor section or the turbine section by the motor.

5. A wash system for a gas turbine aircraft engine comprising a compressor section and a turbine section, the wash system comprising:
an accessory gearbox attached to the gas turbine aircraft engine;
a core turning assembly comprising a motor attached to the accessory gearbox and rotate one or more components of the compressor section or the turbine section at a rotational speed greater than two (2) revolutions per minute (RPM) and less than five hundred (500) RPM when the accessory gearbox is attached to the gas turbine aircraft engine and during washing operations of the gas turbine aircraft engine, and
a wash fluid line fluidly connected to a location within a core air flowpath of the gas turbine aircraft engine, the wash fluid line comprising one or more of a first wash fluid line oriented adjacent an inlet of the core air flowpath of the gas turbine aircraft engine and a second wash fluid line extending through an inspection hole of the gas turbine aircraft engine,
wherein the accessory gearbox comprises a plurality of gears;
wherein the accessory gearbox comprises a plurality of accessory pads that communicate with the plurality of gears and is configured to be coupled to an outer casing of the gas turbine aircraft engine;
wherein the core turning assembly comprises an offset tool and an adapter, the offset tool coupled to the motor and the adapter, the adapter being coupled to a selected one of the plurality of accessory pads, wherein the adapter is also coupled to a selected one of the plurality of gears other than a starter gear, wherein the selected one of the plurality of gears is coupled to a horizontal driveshaft, wherein the horizontal driveshaft is coupled to a transfer gearbox, wherein the transfer gearbox is coupled to a selected one of the one or more components;
wherein the accessory gearbox is configured to drive multiple accessories of the gas turbine aircraft engine at least in part via the plurality of accessory pads when the gas turbine aircraft engine is operating.

6. The wash system of claim 5 , wherein the motor is configured to rotate the one or more components of at least one of the compressor section or the turbine section in a first circumferential direction and in a second circumferential direction, and wherein the second circumferential direction is opposite the first circumferential direction.

7. The wash system of claim 5 , wherein the horizontal driveshaft is selectively disengaged from the starter gear and rotatable independently of the starter gear.

8. A method for washing a gas turbine aircraft engine comprising:
attaching a motor of a core turning assembly to an accessory gearbox of the gas turbine aircraft engine;
rotating at least a portion of a compressor section or a turbine section of the gas turbine aircraft engine including one or more components using the motor of the core turning assembly, wherein the accessory gearbox comprises a plurality of gears, wherein rotating at least a portion of the compressor section or the turbine section of the gas turbine aircraft engine comprises rotating a horizontal driveshaft, wherein rotating at least a portion of the compressor section or the turbine section of the gas turbine aircraft engine includes rotating at least a portion of the compressor section or the turbine section of the gas turbine aircraft engine using the motor of the core turning assembly at a rotational speed greater than two (2) revolutions per minute (RPM) and less than five hundred (500) RPM; and
providing a wash fluid to a core air flowpath of the gas turbine aircraft engine via a wash fluid line, wherein providing the wash fluid to the core air flowpath of the gas turbine aircraft engine via the wash fluid line includes providing one or more of a first portion of the wash fluid through an inlet of the core air flowpath of the gas turbine aircraft engine via a first wash fluid line and providing a second portion of the wash fluid through an inspection hole of the gas turbine aircraft engine via a second wash fluid line;
wherein the accessory gearbox comprises a plurality of accessory pads that communicate with the plurality of gears and is configured to be coupled to an outer casing of the gas turbine aircraft engine;
wherein the core turning assembly comprises an offset tool and an adapter, the offset tool coupled to the motor and the adapter, the adapter being coupled to a selected one of the plurality of accessory pads, wherein the adapter is also coupled to a selected one of the plurality of gears other than a starter gear, wherein the selected one of the plurality of gears is coupled to the horizontal driveshaft, wherein the horizontal driveshaft is coupled to a transfer gearbox, wherein the transfer gearbox is coupled to a selected one of the one or more components;
wherein the accessory gearbox is configured to drive multiple accessories of the gas turbine aircraft engine at least in part via the plurality of accessory pads when the gas turbine aircraft engine is operating.

9. The method o

Assignees

• Gen Electric

Inventors

• Eriksen Michael Edward
• O'Connor Ethan Patrick

Classifications

• B08B3/003

  Cleaning involving contact with foam · CPC title

• F01D25/34

  Turning or inching gear · CPC title

• F05D2220/32

  in gas turbines · CPC title

• F05D2260/406

  through hydraulic systems · CPC title

• F01D25/002 Primary

  Cleaning of turbomachines · CPC title