Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Experimental Investigation of Porous Bearings Under Different Lubricant and Lubricating Conditions

  • Durak, Ertugrul (Suleyman Demirel University, Mechanical Engineering Dept.)
  • Published : 2003.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

The performance of porous bearing under different lubricants and lubricating conditions was experimentally investigated in this study. In order to carry out the experiments, a new test rig was designed to determine the tribological properties of based sintered bronze journal bearings that were manufactured by powder metallurgy (P/M) techniques. To determine the effects of lubricating conditions with and without oil supplement (OS) on the tribological characteristics of these bearings under static loading and periodic loadings, some experiments were carried out using different lubricants. In the tests, pure base oil (SAE 20W50), two fully formulated commercial engine oils (SAE20W50) and lubricating oils with commercial additive concentration ratio of 3％ were used. The worn surfaces of test bearings were examined using optical microscopy. Experimental results showed that the change in friction coefficient was more stable and in smaller magnitude under static loading than that of periodic loading. In addition, the friction coefficient and the wear rate conducted with base oil resulted in higher values than those of fully formulated oils with and without OS lubricating conditions. The experimental results obtained in this study indicated that the correct selection of lubricant and suitable running conditions were very important on the tribological characteristics of porous bearings.

Keywords

References

  1. Andersson, P., Juhanko, J., Nikkila, A. P. and Lintula, P., 1996, 'Influence of Topography on the Running-in of Water-lubricated Silicon Carbide Journal Bearings,' Wear, Vol. 201, pp. 1-9 https://doi.org/10.1016/S0043-1648(95)06815-5
  2. Braun, A. L., 1982, 'Porous Bearings,' Tribology International, Vol. 15, pp. 235-242 https://doi.org/10.1016/0301-679X(82)90074-3
  3. Cusano, C. and Phelan, R. M., 1973, 'Experimental Investigation of Porous Bronze Bearings,' Trans. ASME, Journal of Lubrication Technology, Vol. 95, pp.173-180 https://doi.org/10.1115/1.3451760
  4. Cusano, C., 1997, 'Porous Metal Bearings,' in : Tribology Data Handbook, E. R. Booser (Ed.), CRC Press, New York, pp. 719-734
  5. Durak, E., Kurbanoglu, C., Kaleli, H. and Tunay, R. F., 2002, 'Measurement of Friction Force and Wear of Base Sintered Journal Bearings Manufactured With Powder Metallurgy (P/M),' in: 4th International Conference on Tribology, pp, 399-405, Kayseri-Turkey
  6. Fu, Y., Batchelor, A. W., Loh, N. L. and Tan, K. W., 1998, 'Effect of Lubrication by Mineral and Synthetic Oils on the Sliding Wear of Plasma Nitrided AISI 410 Stainless Stell,' Wear, Vol. 219, pp. 169-176 https://doi.org/10.1016/S0043-1648(98)00184-7
  7. Horng, J. H., Len, M. L. and Lee, J. S., 2002, 'The Contact Characteristics of rough Surfaces in Line Contact During Running-in Process,' Wear, Vol. 253, pp. 899-913 https://doi.org/10.1016/S0043-1648(02)00025-X
  8. Junghans, R., Neukirchner, J., Schumann, D. and Lippman, K. H., 1996, 'The Use of Sintered Metal Bearings for High Sliding Velocities,' Tribology International, Vol. 29, No.3, pp. 181-192 https://doi.org/10.1016/0301-679X(95)00087-K
  9. Kaleli, H. and Berthier, Y., 2001, 'The Mechanism of Layer Formation and the Function of Additives Used in Fully Formulated Engine Crankcase Oils, Boundary and Mixed Lubrication: Science and Applications,' Proceedings of the 28th Leeds-Lyon Symposium on Tribology as a part World Tribology Congress, WTC, in Vienna, in press
  10. Kaneko, S., 1993, 'Porous Oil Bearings,' Japanese Journal of Tribology, Vol. 38, No.9, pp. 1141-150
  11. Kasahara, M., 1997, 'Recent Development of Oilless Bearings,' Japanese Journal of Tribology, Vol. 42, No.4, pp.425-433
  12. Kurbanoglu, C., Durak, E., Tunay, R. F. and Tiifekci, K., 2002, 'Experimental Investigations of Porous Bearing Under Dynamical Loading,' in. Proc. 3rd International Powder Metallurgy Conference, Ankara-Turkey, 'In Turkish, in Press
  13. McFadden, C., Soto, C. and Spencer, N. D, 1997, 'Adsorption and Surface Chemistry in Tribology,' Tribology International, Vol. 30-12, pp. 881-888 https://doi.org/10.1016/S0301-679X(97)00075-3
  14. Raman, R. and Chennabasavan, T. S., 1998, 'Experimental Investigations of Porous Bearings Under Vertical Sinusoidally Fluctuating Loads,' Tribology International, Vol. 31, No.6, pp. 325-330 https://doi.org/10.1016/S0301-679X(98)00041-3
  15. Technical Bulletin #1, and 2, 1990, Lubrication Solution and Product Catalogue, Power up Inc., Canada
  16. Yang, Z. and Chung, Y. W., 1997, 'Surface Science Perspective of Tribological Failure,' Tribology Letters, Vol. 3, pp. 19-26 https://doi.org/10.1023/A:1019139929244
  17. Yong- Xin, Q., Ji, M., Yi-Geng, T., Gui-Ru, Z., Gao-Yi, S. and Guo-Liang, W., 1985, 'Investigation of Sintered Bronze Bearings Under High-Speed Conditions,' Tribology International, Vol. 18, No.2, pp.75-80 https://doi.org/10.1016/0301-679X(85)90033-7