This paper discusses a non-intrusive acoustical diagnostic technique for assessing the wear and associated flow degradation of hydraulic pumps. The technique utilizes near-field airborne noise measurements to determine the acoustical energy emitted by the pump at various pumping harmonics. Ratios of the pumping harmonic noise levels are transformed into a Noise Wear Index. Data are presented which show the correlation between the Noise Wear Index and gear pump contaminant induced wear as indicated by a degradation of pump flow performance. The use of the Noise Wear Index for diagnosing system infirmities and improving system reliability is discussed.
NON-INTRUSIVE ACOUSTICAL DIAGNOSTICS FOR APPRAISING PUMP CONTAMINANT WEAR
Sae Technical Papers
1977 SAE International Off-Highway and Powerplant Congress and Exposition ; 1977
1977-02-01
Conference paper
English
FERROGRAPHIC EVALUATION OF PUMP CONTAMINANT WEAR
SAE Technical Papers | 1977
|Non-Intrusive Diagnostics of Oxygen Sensors
SAE Technical Papers | 2017
|Appraising Soviet Astronautics
NTIS | 1961
|INTRUSIVE DIAGNOSTICS AND PROGNOSTICS USING CYCLE EFFICIENCY MANAGEMENT
European Patent Office | 2019
|