In-line oil debris monitor for aircraft strongenginestrong condition.pdfVIP

In-line Oil Debris Monitor for Aircraft Engine Condition Assessment Authors: Jerry L. Miller, Pratt Whitney Aircraft Co., 400 Main Street, East Hartford, CT 06108, tel# (860) 565-4020’ Duka Kitaljevich, GasTOPS Ltd., 1011Polytek Street, Ottawa, ON, Canada K1J 953, tel# (613) 744-3530 Absrrucr-The development of an in-line, full flow oil prone to false alarms due to the build up of fine debris sensor for aircraft engine condition assessment is ferromagnetic debris or “fuzz”. described. First used on the F22 fighter, this sensor is the only “ all-metals” debris detector in production. The sensor The ODM oil debris monitor, first developed by GasTOPS is based on an inductive measurement technique which for the F22 Advanced Tactical Fighter engine, the Pratt enables the system to detect, count and classify wear metal Whitney F119, relies upon sensing the disturbances to an particles by size and type (ferromagnetic and non- electromagnetic field created by passing metallic particles, ferromagnetic) above a minimum particle size threshold. In either ferromagnetic or non-ferromagnetic. The debris is flight, the measured count values are compared to preset not captured by the sensor, thus it requires neither periodic levels to provide prognostic health information on the oil- inspection nor cleaning, and is entirely “remote” in wetted components of the engine. This paper describes the operation. sensor design requirements, principle of operation, electronic design and mechanical design features. The This paper reviews the common