Beating Phenomenon of Multi-Harmonics Defect Frequencies in a Rolling Element Bearing: Case Study from Water Pumping Station
Rolling element bearings are widely used in industry,
especially where high load capacity is required. The diagnosis of
their conditions is essential matter for downtime reduction and saving
cost of maintenance. Therefore, an intensive analysis of frequency
spectrum of their faults must be carried out in order to determine the
main reason of the fault. This paper focus on a beating phenomena
observed in the waveform (time domain) of a cylindrical rolling
element bearing. The beating frequencies were not related to any
sources nearby the machine nor any other malfunctions (unbalance,
misalignment ...etc). More investigation on the spike energy and the
frequency spectrum indicated a problem with races of the bearing.
Multi-harmonics of the fundamental defects frequencies were
observed. Two of them were close to each other in magnitude those
were the source of the beating phenomena.
[1] M. Xu & R. D. Marangoni. Vibration analysis of a motor-flexible
coupling-rotor system subject to misalignment and unbalance, part II:
experimental validation. Journal of sound and vibration. 1994. 176(5),
681-694.
[2] D.G. Haung. Characteristics of torsional vibrations of a shaft with
unbalance. Journal of sound and vibration. 2007. 308, 692-698.
[3] R. B. W. Heng and M. j. M. Nor. Statistical analysis of sound and
vibration signals for monitoring rolling element bearing condition.
Applied acoustics. 1998. Vol 53, No. 1-3, pp 221-226.
[4] H. R. Martin & F. Honarvar. Application of statistical moments to
bearing failure detection. Applied acoustics. 1995. Vol 44, pp 67-77.
[5] Sadettin Orhan, Nizami Akturk & Veli Celik. Vibration monitoring for
defect diagnosis of rolling element bearings as a predictive maintenance
tool: comprehensive case studies. NDT&E International 39. 2006. 293-
298.
[1] M. Xu & R. D. Marangoni. Vibration analysis of a motor-flexible
coupling-rotor system subject to misalignment and unbalance, part II:
experimental validation. Journal of sound and vibration. 1994. 176(5),
681-694.
[2] D.G. Haung. Characteristics of torsional vibrations of a shaft with
unbalance. Journal of sound and vibration. 2007. 308, 692-698.
[3] R. B. W. Heng and M. j. M. Nor. Statistical analysis of sound and
vibration signals for monitoring rolling element bearing condition.
Applied acoustics. 1998. Vol 53, No. 1-3, pp 221-226.
[4] H. R. Martin & F. Honarvar. Application of statistical moments to
bearing failure detection. Applied acoustics. 1995. Vol 44, pp 67-77.
[5] Sadettin Orhan, Nizami Akturk & Veli Celik. Vibration monitoring for
defect diagnosis of rolling element bearings as a predictive maintenance
tool: comprehensive case studies. NDT&E International 39. 2006. 293-
298.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:61695", author = "Fathi N. Mayoof", title = "Beating Phenomenon of Multi-Harmonics Defect Frequencies in a Rolling Element Bearing: Case Study from Water Pumping Station", abstract = "Rolling element bearings are widely used in industry,
especially where high load capacity is required. The diagnosis of
their conditions is essential matter for downtime reduction and saving
cost of maintenance. Therefore, an intensive analysis of frequency
spectrum of their faults must be carried out in order to determine the
main reason of the fault. This paper focus on a beating phenomena
observed in the waveform (time domain) of a cylindrical rolling
element bearing. The beating frequencies were not related to any
sources nearby the machine nor any other malfunctions (unbalance,
misalignment ...etc). More investigation on the spike energy and the
frequency spectrum indicated a problem with races of the bearing.
Multi-harmonics of the fundamental defects frequencies were
observed. Two of them were close to each other in magnitude those
were the source of the beating phenomena.", keywords = "Bearing, beating, spike energy, vibration.", volume = "3", number = "9", pages = "1108-5", }