METHODS OF ESTIMATION OF COMPLEX FREQUENCY DESCRIPTIONS OF LTM AND BRM BEARING KNOTS

Abstract

The method of studying bearing units (ball bearings) of handling and construction of road machines in the low-frequency range of vibration-acoustic signal is presented. It includes: the choice of the method and place of vibration sensors installation, vibration signals registration modes, instruments, algorithms of processing and formation of diagnostic features of the signal, determination of the threshold values of the diagnostic parameter. The characteristic spectra of vibration velocities of zero defect and defect ball bearings demonstrating graphically diagnostic signs of their damage are given.

Keywords

• fourier transformation
• ball bearings
• frequency components
• capacity of strip portion of spectrum
• rotor harmonic components
• signal liftration