Investigation on the Effect of Improper Lubrication on the Performance of Rolling Element Bearings

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Mosayebi Kulluje, Reza | 2011

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 42942 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Behzad, Mehdi; Hoviattalab, Maryam
Abstract:
In this project, the effect of improper lubrication on vibrational behavior of rolling element bearings is investigated. Different lubrication conditions were deliberately produced using three oils with different viscosity grades on a bearing at different loads and speeds. The acceleration of bearing vibrations were measured, then analyzed by means of squared envelope analysis, a special case of cyclostationary analysis. The results and their comparison showed that decrease in lubricant’s viscosity grade can lead to an increase in magnitude of cyclic frequencies equal to cage frequency and its harmonics. This observation can be helpful in detection of lubricant degradation and in differentiating an improper lubrication and a proper one. This most matters when lubricant loses its properties due to contamination or degradation.
Keywords:
Rolling Bearing ; Vibrational Analysis ; Cyclostationary ; Viscosity ; Experimental Investigation ; Improper Lubrication

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