THERMAL SCIENCE

International Scientific Journal

ANALYSIS OF GREASE CONTAMINATION INFLUENCE ON THE INTERNAL RADIAL CLEARANCE OF BALL BEARINGS BY THERMOGRAPHIC INSPECTION

ABSTRACT
One of the most important factors influencing ball bearings service life is its internal radial clearance. However, this parameter is also very complex because it depends on applied radial load and ball bearings dimensions, surface finish and manufacturing materials. Thermal condition of ball bearings also significantly affects internal radial clearance. Despite many researches performed in order to find out relevant facts about different aspects of ball bearings thermal behaviour, only few of them are dealing with the real working conditions, where high concentration of solid contaminant particles is present. That’s why the main goal of research presented in this paper was to establish statistically significant correlation between ball bearings temperatures, their working time and concentration of contaminant particles in their grease. Because of especially difficult working conditions, the typical conveyor idlers bearings were selected as representative test samples and appropriate solid particles from open pit coal mines were used as artificial contaminants. Applied experimental methodology included thermographic inspection, as well as usage of custom designed test rig for ball bearings service life testing. Finally, by obtained experimental data processing in advanced software, statistically significant mathematical correlation between mentioned bearings characteristics was determined and applied in commonly used internal radial clearance equation. That is the most important contribution of performed research - the new equation and methodology for ball bearings internal clearance determination which could be used for eventual improvement of existing bearings service life equations. [Projekat Ministarstva nauke Republike Srbije, br. TR35029 i br. TR14033]
KEYWORDS
PAPER SUBMITTED: 2015-03-19
PAPER REVISED: 2015-03-27
PAPER ACCEPTED: 2015-04-29
PUBLISHED ONLINE: 2015-06-07
DOI REFERENCE: https://doi.org/10.2298/TSCI150319083M
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE 1, PAGES [255 - 265]
REFERENCES
  1. ***, U.S. Department of Commerce - National Security Assessment of the Ball and Roller Bearing Industry, www.bis.doc.gov/index.php/forms-documents/doc_view/59-statistical-handbook-of-the-ball-and-roller-bearing-industry-update-2014
  2. Tomovic, R., Calculation of the Necessary Level of External Radial Load for Inner Ring Support on q Rolling Elements in a Radial Bearing with Internal Radial Clearance, International Journal of Mechanical Sciences, 60 (2012), 1, pp. 23-33
  3. Mitrović, R., Study on Influence of Design and Tribology Parameters on Rolling Bearings Working Performances during High Speed Rotations, Ph.D. Thesis, University of Belgrade -Faculty of Mechanical Engineering, Belgrade, RS, 1992.
  4. Dwyer-Joyce, R.S., Predicting the Abrasive Wear of Ball Bearings by Lubricant Debris, Wear, 233-235 (1999), pp. 692-701, doi:10.1016/S0043-1648(99)00184-2
  5. ***, NSK - Internal Clearance - Types and Norms, www.nskeurope.com/cps/rde/dtr/eu_en/ literature_bearing/TI-EN-0110-FINAL.pdf
  6. Harris, T., Rolling Bearing Analysis, John Wiley & Sons Inc., New York, USA, 2001
  7. Ricci, M., Internal Loading Distribution in Statically Loaded Ball Bearings Subjected to a Combined Radial, Thrust, and Moment Load, including the Effects of Temperature and Fit, Proceedings, 11th Pan-American Congress of Applied Mechanics, Foz do Iguaçu, Brazil, 2010, pp. 1-6
  8. Bakić, G., et al., New Methodology for Monitoring and Prevention of Rotating Parts Failures, FME Transactions, 35 (2007), 4, pp. 195-200
  9. Seo, J., et al., Quantitative Assessment of the Detection of Defects by Thermographic Inspection in Vibration Machinery Mode, Proceedings, 18th International Conference on Composite Materials, Jeju Island, South Korea, 2011, pp. 1-4
  10. Kushawaha, A., Analysis of the Ball Bearing considering the Thermal (Temperature) and Friction Effects, International Journal of Engineering Research and Applications (IJERA), Special issue (2012), pp. 115-120
  11. Kahlman, L. and Hutchings, I., Effect of Particulate Contamination in Grease-Lubricated Hybrid Rolling Bearings, Tribology Transactions, 42 (1999), 4, pp. 842-850
  12. Tasić, M., et al., Influence of running conditions on resonant oscillations in fresh-air ventilator blades used in thermal power plants, Thermal Science, 13 (2009), 1, pp. 139-146
  13. ***, SKF, www.skf.com/group/splash/index.html
  14. ***, Extech IRC57 InfraCam SD Thermal Imaging Camera, www.instrumentation2000.com/

© 2020 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence