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Real Time Simultaneous in-Line Wear and Lubricant Condition Monitoring
Final rept. Jun 86-Dec 86
AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH
Pagination or Media Count:
An in-line Complete Oil Breakdown Rate Analyzer COBRA and Quantitative Debris Monitor QDMR were installed in the oil system of an aircraft turbine engine lubricant simulator. The in-line COBRA readings correlated well with those of a standard laboratory model COBRA and total acid number of the deteriorating lubricant. Increases in QDMR particle counts corresponded with increases in trace iron content, which reflected abnormal wear occurring in the simulator. Analytical and direct reading ferrographic data confirmed the rapid increase and eventual modest decrease in wear debris concentration. After test completion, it was determined that a mainshaft bearing had experienced abnormal wear. Thus, for the first time successful capability for real-time simultaneous in-line wear and lubricant condition monitoring was demonstrated. Keywords Aircraft engines.
APPROVED FOR PUBLIC RELEASE