METHOD OF DIAGNOSING ANTIFRICTION BEARINGS OF RAILWAY AND METRO ROLLING STOCK AXLE BOXES Russian patent published in 2011 - IPC B61K9/04 F16C19/52 G01M13/04 

FIELD: transport.

SUBSTANCE: invention relates to machine building and bearings and may be used for diagnosing antifriction bearings of rolling stock axle boxes. At least two acoustic emission transducers are fitted on whatever surface of RH and LH wheels, except for rail head surfaces, perpendicular to railway direction. Maximum amplitude overswing in emission signals, alternating sequentially continuously in time, is determined in preset rolling stock frequency range of 30-300 kHz to control bearings wear and sampled at the rate of 50-0.1 mcs. Duration of emission signal overswing, alternating sequentially continuously in time, and interval between overwings per one revolution of bearing is determined and defect on raceway length in mm is calculated by preset formula. defect location is determined proceeding from comparison of time interval measured in diagnostics between maximum emission signals with one of the three time intervals calculated by the formula between overswings of maximum emission signals. Each of calculated time intervals between maximum emission signal overswings correspond to particular defect. Bearing state is defined form comparison between defect revealed by diagnostics and tolerable defect of the same type with due allowance for operating characteristics of the bearing.

EFFECT: higher rate of control and measurement of axle bearing defect and its location on the run.

1 ex, 1 dwg