Wands for gas turbine engine cleaning

Patent metadata

Field	Value
Publication number	US-10773283-B2
Application number	US-201715790784-A
Country	US
Kind code	B2
Filing date	Oct 23, 2017
Priority date	Sep 10, 2014
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

Wands are used as parts of cleaning systems to conduct cleaning agents into gas turbine engine cores. Wands according to the present disclosure include inlet assemblies adapted to connect to cleaning agents, dispensers adapted to discharge cleaners into gas turbine engines, and conduits that extend from the inlet assemblies to the dispensers.

First claim

What is claimed is:

1. A wand adapted for use with a gas turbine engine to clean the gas turbine engine, the wand comprising
an inlet assembly configured to be coupled to a liquid source,
a dispenser configured to discharge liquid into the gas turbine engine core,
a conduit that extends from the inlet assembly to the dispenser that is adapted to carry liquid from the inlet assembly to the dispenser, and
an inlet filler configured to selectively expand from a stowed configuration in which the inlet filler is collapsed to a use configuration in which the inlet filler extends away from other components of the wand, the inlet filler including a plurality of inflatable bladders that expand when filled with a gas and at least one web panel that extends between the inflatable bladders to provide a structure sized to fill an air inlet associated with a gas turbine engine core and block liquid from leaking away from the gas turbine engine core.

2. The wand of claim 1 , wherein the inlet filler includes a biasing member adapted to bias the inlet filler toward the stowed configuration.

3. The wand of claim 2 , wherein the biasing member is an elastic band that extends around an outer edge of the rest of the inlet filler such that the elastic band engages edges of the air inlet when the inlet filler is expanded to the use configuration within the air inlet.

4. The wand of claim 1 , wherein the at least one web panel is formed to include apertures sized to allow air to pass through the air inlet to the gas turbine engine core during dry motoring of the gas turbine engine core when the inlet filler is expanded to the use configuration within the air inlet.

5. The wand of claim 4 , wherein the apertures are spaced apart from the outer edge of the inlet filler such that liquid pooling adjacent the outer edge is blocked from leaking away from the gas turbine engine core.

6. The wand of claim 1 , wherein the conduit includes a first tube configured to carry the liquid and a second tube configured to carry pressurized gas to the inflatable bladders.

7. The wand of claim 6 , wherein the conduit includes a third tube configured to carry a cleaning agent from the inlet assembly to the dispenser.

8. The wand of claim 7 , wherein the dispenser is an aeration dispenser configured to mix liquid from the first tube, foaming cleaner from the second tube, and air from the atmosphere to produce foamed cleaner.

9. The wand of claim 8 , wherein the aeration dispenser includes a coupling that forms a water passage in fluid communication with the first tube, a foaming cleaner passage in fluid communication with the third tube, and a regulator mounted for movement relative to the coupling to selectively restrict the foaming cleaner passage.

10. The wand of claim 9 , wherein the regulator includes an atmospheric passage adapted to move relative to the coupling to selectively couple the aeration passage with the atmosphere around the aeration dispenser.

11. A wand adapted for use with a gas turbine engine to clean the gas turbine engine, the wand comprising
an inlet assembly configured to be coupled to a liquid source,
a dispenser configured to discharge liquid into the gas turbine engine core,
a conduit that extends from the inlet assembly to the dispenser that is adapted to carry liquid from the inlet assembly to the dispenser, and
an inlet filler configured to selectively expand from a stowed configuration in which the inlet filler is collapsed to a use configuration in which the inlet filler extends away from other components of the wand, the inlet filler including an expansion mechanism and at least one web panel that extends between components of the expansion mechanism to provide a structure sized to fill an air inlet associated with a gas turbine engine core and block liquid from leaking away from the gas turbine engine core,
wherein the at least one web panel is formed to include apertures sized to allow air to pass through the air inlet to the gas turbine engine core during dry motoring of the gas turbine engine core when the inlet filler is expanded to the use configuration within the air inlet, and wherein the apertures are spaced apart from the outer edge of the inlet filler such that liquid pooling adjacent the outer edge is blocked from leaking away from the gas turbine engine core,
wherein the expansion mechanism includes a plurality of inflatable bladders.

12. The wand of claim 11 , wherein the expansion mechanism includes an expanding linkage configured to expand within the air inlet of the gas turbine engine core.

13. The wand of claim 11 , wherein the conduit includes a first tube configured to carry the liquid and a second tube configured to carry pressurized gas to the inflatable bladders.

14. The wand of claim 13 , wherein the conduit includes a third tube configured to carry a cleaning agent from the inlet assembly to the dispenser.

15. The wand of claim 14 , wherein the dispenser is an aeration dispenser that includes a coupling that forms a water passage in fluid communication with the first tube, a foaming cleaner passage in fluid communication with the third tube, and a regulator mounted for movement relative to the coupling to selectively restrict the foaming cleaner passage, and wherein the regulator includes an atmospheric passage adapted to move relative to the coupling to selectively couple the aeration passage with the atmosphere around the aeration dispenser.

16. The wand of claim 11 , wherein the inlet filler includes a biasing member adapted to bias the inlet filler toward the stowed configuration.

17. The wand of claim 16 , wherein the biasing member is an elastic band that extends around an outer edge of the rest of the inlet filler such that the elastic band engages edges of the air inlet when the inlet filler is expanded to the use configuration within the air inlet.

18. The wand of claim 11 , wherein at least one web panel extends between the plurality of inflatable bladders to provide a structure sized to fill an air inlet associated with a gas turbine engine core and block liquid from leaking away from the gas turbine engine core.

Assignees

• Rolls Royce Corp

Inventors

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

Classifications

• B01F25/3111

  Devices specially adapted for generating foam, e.g. air foam · CPC title

• B01F25/312521

  Adjustable Venturi nozzle · CPC title

• B01F23/235

  for making foam · CPC title

• B01F25/31242

  the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit (B01F25/31243 takes precedence) · CPC title

• B08B3/02

  Cleaning by the force of jets or sprays · CPC title