Abstract
Vibration signal analysis is a common tool to detect bearing condition. Effective methods of vibration signal analysis should extract useful information for bearing condition monitoring and fault diagnosis. Spectral kurtosis (SK) represents one valuable tool for these purposes. The aim of this paper is to study the relationship between bearing clearance and bearing vibration frequencies based on SK method. It also reveals the effect of the bearing clearance on the bearing vibration characteristic frequencies This enables adjustment of bearing clearance in situ, which could significantly affect the performance of the bearings. Furthermore, the application of the proposed method using SK on the measured data offers useful information for predicting bearing clearance change. Bearing vibration data recorded at various clearance settings on a floating and a fixed bearing mounted on a shaft are the basis of this study
Highlights
Rolling element using bearings are widely used in rotating machines
Later analyses by Singh and Ahmed Saleh Al Kazzaz (2003) [2], Bellini et al (2008) [3] on induction machines confirmed this insight and gave an overview on diagnostic techniques for fault detection based on vibration analysis and current signal analysis
The application of the Spectral kurtosis (SK) method was proven as a powerful tool for bearing fault detection
Summary
Rolling element using bearings are widely used in rotating machines. Their condition drastically influences the performance of the whole machine or production line. Most diagnostic techniques based on vibration analysis focus on the detection of major mechanical defects, rather than monitoring the actual bearing condition. Tiwari et al (2000a) [13]; Sopanen and Mikkola (2003) [10]; Cao and Xiao (2008) [14] studied the frequency spectra of the vibration caused by rotating bearings experimentally with respect to the clearance. These publications reported peaks in the frequency spectra at the rotation frequency fr and the roller passing frequency, sometimes referred to as varying compliance, as well as all their harmonics and linear combinations. The aim of this work is to develop a method for in-situ bearing clearance measurement for their adjustment and monitoring, using vibration analysis based mainly on SK
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