This paper presents the results of research to evaluate the feasibility of voltammetric techniques for development into on-line and off-line techniques capable of monitoring the thermal and oxidative degradations of aircraft turbine engine oils. The off-line techniques require less than one minute to perform, and very little expertise. The off-line techniques measure the percent of the remaining antioxidant and the conductivity of the oil sample. The on-line techniques require less than 15 seconds to perform, can be performed in static or flowing conditions and can function at operating temperatures up to 300 deg C. The on-line techniques measure the electroactivity and the conductivity of the heated oil. The results of this research indicate that both oxidative and thermal degradations of used oils must be monitored to determine the operating conditions of aircraft turbine engines. Oxidative degradation is monitored by determining the percent of remaining antioxidant (off-line) and electroactivity (on-line) of the used oil. Thermal degradation is monitored by determining conductivity (off-line or on-line) of the used oil. Combined oxidative and thermal degradation evaluations of used oils can be used to predict oil change intervals for normally operating equipment and to detect abnormally operating engines prior to malfunction. (To be continued)
On-line and off-line techniques for monitoring the thermal and oxidative degradations of aircraft turbine engine oils - Part I: Laboratory evaluations
On-line- und Off-line-Techniken zur Überwachung der thermischen und oxidativen Zersetzung von Schmierölen in Flugzeugturbinen, Teil 1: Labor-Bewertung
Lubrication Engineering ; 51 , 11 ; 914-921
1995
8 Seiten, 4 Bilder, 2 Tabellen, 9 Quellen
Aufsatz (Zeitschrift)
Englisch
Schmieröl , Schmierölverbrauch , Tribotechnik , Laboratoriumsversuch , Antioxidationsmittel , Flugzeugturbine , Leistungsbewertung , Bewertungsmethode , Voltametrie , thermische Zersetzung , Oxidation , Lebensdauerfaktor , Betriebsbeanspruchung , Online-Betrieb , Offline-Betrieb , elektrische Leitfähigkeit , Leitfähigkeitsmesser , Temperaturbereich , Messwert
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