Michał Stosiak

Vibration insulation of hydraulic system control components

This paper deals with the effects of external mechanical vibrations on hydraulic valves. A theoretical analysis of the contribution of selected vibration insulators to a reduction in hydraulic valve housing vibrations was carried out. The results of preliminary experimental tests of simple vibration insulators are reported.

Possibilities of diagnosing cavitation in hydraulic systems

Conditions of arising cavitation and experimental investigations of this phenomenon by means of a special vacuum vessel are described. A simulation model of the piston–cylinder unit of a pump with an inclinable cylinder block was used to visualize cavitation in the pump. The results of tests aimed at showing a correlation between the onset of cavitation and an audible diagnostic signal are presented. The suction space of the tested axial-flow multipiston positive-displacement pump with an inclinable cam plate was selected as the most likely place for cavitation to occur. An audible diagnostic signal indicating the onset of cavitation was also detected in the case of a multipiston pump with an inclinable cylinder block. An example of the configuration of an acoustic probe kit for use under industrial conditions is presented.

The didactic and scientific research capabilities of the Laboratory of Hydraulic Drives & Vibroacoustics of Machines

The didactic and scientific research capabilities of the Laboratory of Hydraulic Drives & Vibroacoustics of Machines