METHOD FOR DIAGNOSTICS OF BEARINGS OF ROTARY EQUIPMENT BASED ON THE ASSESSMENT OF MICROVARIATIONS OF ROTATION OF THE SHAFT Russian patent published in 2022 - IPC G01M13/04 

FIELD: testing.

SUBSTANCE: invention relates to the field of non-destructive testing and can be used for diagnostics of the condition of bearings of rotary equipment, e.g., reducer gearboxes, turbines, engines, and generators. Claimed is a method for diagnostics of bearings of rotary equipment based on recording microvariations of rotation of the shaft by installing a rotation speed sensor (RSS) on the shaft of the tested article, generating pulses of a standard form at times t_i at the values of the shaft angle φ=(360/N)i, wherein N is the number of pulses in a full revolution of the shaft, i=1, 2, 3, … is the number of the pulse, obtaining a sequence of inter-pulse intervals {T_i}, wherein T_i=t_i+1-t_i, assessing the variability T_i by finding the root mean square deviation σ of values of T_i from the mean value . The sequence {T_i} is therein filtered, the root mean square deviation σ of the values of from the average value of is found for the filtered sequence , and if the recorded σ is higher than the determined value, then a conclusion is made about the presence of a bearing defect in the tested article.

EFFECT: increase in the sensitivity of diagnostics.

1 cl, 2 dwg