Analysis of Solid Contaminants in Grease Lubricated Deep Groove Ball Bearing through Vibration, Shock Pulse and Temperature Measurement
Vipin Kumar Satankar1, Vilas Warudkar2

1Vipin Kumar Satankar, M.Tech. Scholar, Department of Mechanical Engineering, Maulana Azad National Institute of Technology, Bhopal (M.P.) India.
2Dr. Vilas Warudkar, Assistant Professor, Department of Mechanical Engineering, Maulana Azad National Institute of Technology, Bhopal (M.P.) India.
Manuscript received on October 21, 2016. | Revised Manuscript received on October 23, 2016. | Manuscript published on October 25, 2016. | PP: 16-19 | Volume-4 Issue-6, October 2016. | Retrieval Number: F1129094616
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Abstract: In rotating machinery, automobiles and aerospace, rolling element ball bearing are in common. For frictionless and continuous running bearing is lubricated with grease and oil, Grease are contaminated with various solid and liquid particles. This is one of the major reasons for bearing failures. When Ball bearing gets operated in contaminated conditions, particles of dirt may enter the bearing, the generated vibration and vibration level being dependent on the amount, the size and the composition of the entering contaminant particles. Some manufacturers state that in this case, no typical frequency pattern is generated, although an audible and disturbing noise may be created. Solid contamination is an important question related to the monitoring of rolling bearing performance because of its action on fatigue failure acceleration resulting from surface denting. In this respect, this project work deals with the effect of contamination of lubricant by solid particles on the dynamic behavior of rolling bearings. Generally different materials such as Silica, metal-burr, dolomite-powder, and iron-ore, all at three concentration levels and different particle sizes were used to contaminate the lubricant. Here metal-burr is used as a contaminant. Experimental tests have been performed on the 6207 deep groove ball bearings lubricated with grease, here we analyze and study the effect of solid contaminants in lubrication through vibration, shock pulse and temperature measurement. The trends in the amount of vibration affected by the contamination of the grease were determined. The contaminant concentration as well as the particle size is varied for each test. Vibration signatures were analyzed with respect to root mean square (RMS) values of amplitude in terms of velocity, shock pulse in terms of pulse per seconds, temperature in terms of °C and what is the effect of contaminants on the performance of ball bearing, determined.
Keywords: 6207 deep groove ball bearings, solid contamination, greases, vibration, shock pulse and temperature.