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
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