A Method for Measuring and Calculating Spalling Width of Bearing Inner Raceway

Abstract

A method for measuring and calculating the spalling width of the inner raceway of a bearing. The method first uses an eddy current sensor to obtain vibration displacement signals in the horizontal direction and vertical direction of the bearing shaft, and calculates the axis trajectory deterioration degree σ of the measured signal in combination with the axis trajectory deterioration degree formula; Then use the step-shock waveform feature in the vibration acceleration signal to estimate M optional values ​​of the spalling width of the inner raceway. Based on bearing static-geometric analysis and dynamic behavior analysis, calculate the static axis trajectory degradation degree σ corresponding to M optional values s,i and the degradation degree σ of the dynamic simulation axis trajectory d,i , to obtain M non-intersecting axis trajectory degradation degree intervals [σ s,i ,σ d,i ]; and then by judging the interval of the axis trajectory deterioration degree of the measured signal, the unique value is determined from the M optional values, and the precise measurement and calculation of the spalling width of the inner raceway is completed. The invention provides basic support for state monitoring and residual life prediction of rolling bearings, can prevent major accidents caused by bearing faults, and has important practical application value.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis, and in particular relates to a method for measuring and calculating the spalling width of a bearing inner raceway. Background technique [0002] Rolling bearings are one of the most widely used and most prone to failure parts in mechanical transmission equipment. Spalled raceways are a common bearing failure mode. With the continuous deepening of the research on the local fault mechanism of the bearing system and the continuous development of fault diagnosis technology, the industry is not only satisfied with judging the presence or absence of faults, but is paying more and more attention to the calculation of the fault size. However, most of the existing technologies are aimed at the peeling of the outer raceway; compared with the fixed outer ring, the inner ring rotates with the shaft when the bearing is running, so the vibration response signal of the inner raceway spalling bearing is...

AI Technical Summary

Problems solved by technology

However, most of the existing technologies are aimed at the peeling of the outer raceway; compared with the fixed outer ring, the inner ring rotates with the shaft when the bearing is running, so the vibration response signal of the inner raceway spalling bearing is more complex It is relatively more difficult to accurately measure the spalling of the inner raceway

Moreover, with the traditional vibration acceleration signal analysis method, it is impossible to distinguish the spalling of the inner raceway with different widths with the same pulse interval

Images