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Study on Detection Technique for Outer-race Fault of the Ball Bearing in Rotary Machinery  

Jeoung, Rae-Hyuck (Department of Safety Engineering, Chung-Buk University)
Lee, Byung-Gon (Department of Safety Engineering, Chung-Buk University)
Lee, Doo-Hwan (Korea Electronic Power Research Institute)
Publication Information
Journal of the Korean Society of Safety / v.25, no.3, 2010 , pp. 1-6 More about this Journal
Abstract
Ball bearings are one of main components that support the rotational shaft in high speed rotary machinery. So, it is very important to detect the incipient faults and fault growth of bearing since the damage and failure of bearing can cause a critical failures or accidents of machinery system. In the past, many researchers mainly performed to detect the bearing fault using traditional method such as wavelet, statistics, envelope etc in vibration signals. But study on the detection technique for bearing fault growth has a little been performed. In this paper, we verified the possibility for monitoring of fault growth and detection of fault size in bearing outer-race by using the envelope powerspectrum and probabilistic density function from measured vibration signals.
Keywords
ball bearing; outer-race; envelope signal processing; power-spectrum; probabilistic density function; fault growth; faulty characteristic frequency; rotary machinery;
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