AN EXPERIMENTAL STUDY OF VIBRATIONS OF CENTRIFUGAL FIRE PUMP WITH WORN-OUT BEARING

Abstract

The work deals with an experimental study of vibrations of centrifugal fire pump PN-40UV with and without defects. A worn-out bearing assembly was selected as internal defect. The vibration accelerations signals have been analyzed by their spectral structure. It was determined that the presence of the worn bearing in the pump leads to an appearance of additional harmonics with specific frequencies. This harmonics arises in the most dynamically loaded regime of operation - the usage of a pump filled with a water but without its filing. These vibrational symptoms of the analyzed type of hidden defects could be used in the procedures of fire pumps technical diagnostics.