This paper introduces the methodology of rolling element bearing defect detection using high-gain displacement transducers. The nature of defect influence on the outer race deflection in the vicinity of the transducer tip in time base has been established. Inner race, outer race, and rolling element (ball/roller) defects, which often occur sequentially, can be clearly identified according to spike signals on the time-varying outer race deflection curve along with known bearing frequencies. The developed techniques are fully corroborated by experimental data. Spike-to-deflection amplitude ratio, which is almost independent of changes in speed and load for a given defect, is used to judge the defect severity. Spectral characteristics due to these defects have also been found. It is shown that this direct measurement by using displacement transducers without casing influence, which would be inevitable by using accelerometers mounted on the casing, is a reliable approach to detect bearing defects as well as their severity and locations.
Rolling Element Bearing Defect Detection and Diagnostics Using Displacement Transducers
Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, New Orleans, LA, June 4–7, 2001; Paper 01-GT-028. Manuscript received by IGTI Sept. 2000; final revision received by ASME Headquarters Mar. 2001. Associate Editor: D. Wisler.
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Yu, J. J., Bently , D. E., Goldman , P., Dayton , K. P., and Van Slyke, B. G. (June 19, 2002). "Rolling Element Bearing Defect Detection and Diagnostics Using Displacement Transducers ." ASME. J. Eng. Gas Turbines Power. July 2002; 124(3): 517–527. https://doi.org/10.1115/1.1456092
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