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Research Papers: Applications

An Investigation of Rolling Element Vibrations Caused by Local Defects

[+] Author and Article Information
H. Arslan

Faculty of Engineering, Department of Mechanical Engineering, Kirikkale University, 71451 Kirikkale, Turkeyarslan71@yahoo.com

N. Aktürk

Faculty of Engineering and Architecture, Department of Mechanical Engineering, Gazi University, Maltepe, 06570 Ankara, Turkeynakturk@gazi.edu.tr

J. Tribol 130(4), 041101 (Aug 01, 2008) (12 pages) doi:10.1115/1.2958070 History: Received January 12, 2007; Revised April 23, 2008; Published August 01, 2008

In this paper, a shaft-bearing model is developed in order to investigate the rolling element vibrations for an angular contact ball bearing with and without defects. The shaft-bearing assembly is considered as a mass-spring system. The system shows a nonlinear characteristic under dynamic conditions. The equations of motion in radial and axial directions were obtained for shaft and rolling elements, and they were solved simultaneously with a computer simulation program. Additionally, the effect of localized defects on running surfaces (i.e., inner ring, outer ring, and ball) on the vibration of the balls is investigated. Vibration of rolling elements in the radial direction is analyzed in time and frequency domains. Characteristic defect frequencies and their components can be seen in the frequency spectra of rolling element vibrations. Comparison of the obtained results with similar studies available in literature showed reasonable qualitative agreement.

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Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Proposed elastical model for a ball bearing

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Figure 2

Deflections of the ith ball-race contact.

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Figure 3

The reference axes of the bearing

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Figure 4

Dimension definitions of the defect on the running surface (the inner race, outer race, and ball surface)

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Figure 5

Dimensions of ball bearing and the shaft

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Figure 6

Deformation of balls in loaded and unladed regions

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Figure 7

Vibration of Ball 1 in the radial direction (x) of defect-free ball bearing: (a) displacement-time graph and (b) the frequency spectrum graph for n=5000rpm and PR=10N

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Figure 8

Vibration of Ball 1 in the radial direction (x) of defect-free ball bearing: (a) displacement-time graph and (b) the frequency spectrum graph for n=5000rpm and PR=18N

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Figure 9

Vibration of Ball 1 in the radial direction (x) with defected outer ring: (a) displacement-time graph and (b) the frequency spectrum graph for n=5000rpm and PR=18N

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Figure 10

Vibration of Ball 1 in the radial direction (x) with defected inner ring: (a) displacement-time graph and (b) the frequency spectrum graph for n=5000rpm and PR=18N

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Figure 11

Vibration of Ball 1 in the radial direction (x) with defected ball surface: (a) displacement-time graph and (b) the frequency spectrum graph for n=5000rpm and PR=18N

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