Abstract
A new ultrasonic cavitation detecting method has been developed to study behabior of cavitation in the oil hydraulic equipments. As cavitation is very harmfull to the performance and reliability of the oil hydraulic equipments, it is very useful to have a real time cavitation detecting method. In this study, a single piston eccentric cam driven test pump with a spool valve was used. This test rig simulates the main feature of an axial piston pump and is convenient to investigate cavitation phenonina because of its sipmlicity and the transparent windows on the pumping chamber. In this rig, ultrasonics waves caused by the cavitation were detected with a piezoelectric sensor. Correlations between measured pressure flactuations in the pumping chamber, suction pipe and delivery pipe, a visually observed result and ultrasonic waves were well explained. Finally the sensor was installed on the surface of an actual axial piston pump to detect cavitation successfully.
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