Browse Prior Art Database

ULTRASONIC ENGINE FUEL SYSTEM COMPONENT CLEANING SYSTEM

IP.com Disclosure Number: IPCOM000130126D
Publication Date: 2005-Oct-12
Document File: 5 page(s) / 41K

Publishing Venue

The IP.com Prior Art Database

Related People

Ted H. Furman, Pratt & Whitney Canada: INVENTOR

Related Documents

US 4,561,902: PATENT [+8]

Abstract

A cleaning system for engine fuel components that cleans fuel nozzles from coke deposits and other contaminant build-up in the fuel supply system without removing nozzles or supply lines from the engine by: using ultrasonically excited cleaning fluid that creates a cavitation effect; using high amplitude variation in fluid supply pressure to displace contaminants as a result of rapidly varying the force applied; or injecting air into the cleaning fluid such that contaminants are exposed to rapidly changing medium phases that scrub contaminants away.

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ULTRASONIC ENGINE FUEL SYSTEM COMPONENT

CLEANING SYSTEM

 

INVENTOR: Ted H. Furman

TECHNICAL FIELD

A cleaning system for engine fuel components that cleans fuel nozzles from coke deposits without removing nozzles from the engine by using ultrasonically excited cleaning fluid.

BACKGROUND OF THE ART

Engine fuel systems including fuel injection nozzles for gas turbine engines periodically require cleaning as a result of build-up of coke and other contaminants from the fuel.  Conventionally, the fuel nozzles in particular are removed from the engine clean separately and then reassembled to the engine. Immersion of fuel nozzles in cleaning fluid may include cleaning in an ultrasonically excited bath such as in U.S. Patents Nos. 4,561,902; 5,339,845; 5,401,324; 5,707,453 and 5,147,464.  Alternative systems include inserting an ultrasonic source directed into the area to be cleaned as in U.S. Patent No. 2,924,542. 

Other cleaning systems do not require disassembling of the engine, but simply pump cleaning fluid through the part to be cleaned and rely on the action of cleaning agents to clean the parts, such as in U.S. Patent No. 4,671,230.  Alternatively, cleaning systems may rely on pulses of high pressure gas to create shock waves in a cleaning medium to clean surfaces that are not directly accessible as in U.S. Patent No. 5,154,197.

DISCLOSURE OF THE INVENTION

[0001]   The invention provides a cleaning system for engine fuel components that cleans fuel nozzles from coke deposits and other contaminant build-up in the fuel supply system without removing nozzles or supply lines from the engine by: using ultrasonically excited cleaning fluid that creates a cavitation effect; using high amplitude variation in fluid supply pressure to displace contaminants as a result of rapidly varying the force applied; or injecting air into the cleaning fluid such that contaminants are exposed to rapidly changing medium phases that scrub contaminants away.

DESCRIPTION OF THE DRAWING

Figure 1 is a schematic diagram illustrating the cleaning system conducting cleaning fluid through an intact engine using a storage tank, filtration system, pressure pump, decoupling device and ultrasonic excitation source.

DETAILED DESCRIPTION

[0002]   Figure 1 shows an embodiment of the invention enabling cleaning of the engine and fuel nozzles without removing fuel nozzles from the engine utilizing an ultrasonic excitation source 1 that conducts a cleaning fluid through conduits into the fuel line of the engine 2.  Cleaning fluid is...