METHOD FOR VIBRATION DIAGNOSTICS OF ROTARY EQUIPMENT FOR IDENTIFICATION OF DEFECTS OF ROLLING BEARINGS

摘要

The method of vibration diagnostics of rotary equipment for detecting defects in rolling bearings relates to the field of vibration diagnostics of rotor equipment using systems and methods for processing vibration signals and can be used for early detection of defects in industrial equipment that arise during operation, which will allow for timely maintenance and repair. The method of vibration diagnostics of rotary equipment for detecting defects in rolling bearings by processing a vibration signal is that the vibration signal received from the accelerometer installed on the equipment is subjected to wavelet transform using the basic function ψ (t) where parameter k sets the decay rate of the exponent and parameter ω is the dominant cyclic frequency of the wavelet, form a matrix of wavelet coefficients and build a signalogram of the signal; determine the dominant natural frequencies of the equipment containing shock processes, based on the search for maximums of the scaleogram; sets of wavelet coefficients corresponding to the frequencies found on the scaleogram are selected; for each selected set of wavelet coefficients using the Hilbert transform, an envelope is built, based on which the location of the shock pulses in the time signal is determined, the Fourier transform of the envelope of the set of wavelet coefficients is calculated, a set of bearing frequencies in the spectrum is searched and a matrix of found bearing frequencies is formed; by comparing the totality of the found bearing frequencies with the template, a conclusion is made about the technical condition of the bearing.