Browse > Article
http://dx.doi.org/10.9725/kstle.2006.22.5.269

A Study on Synthesis and Characteristics of the Optimum Urea Type Greaes for Rolling Bearings  

Han, Jong-Dae (Dept. of Chemical Engineering, Changwon National University)
Kim, Sang-Keun (R&D Center FAG Bearings Korea Corp.,)
Kim, Byung-Kwan (Dept. of Chemical Engineering, Changwon National University)
Publication Information
Tribology and Lubricants / v.22, no.5, 2006 , pp. 269-275 More about this Journal
Abstract
Rolling bearings are classified one of the most important machine elements. The various function of bearings are greatly influenced by grease, and higher performance of rolling bearing greases is required to improve bearing lubrication. Three urea/ether oil greases with different composition were synthesized to compare the performance of these greases. The typical grease physical properties were investigated, and life test of these greases was conducted by FE-9 grease life tester. The grease with higher content of the thickener showed higher performance. After these preliminary test, twelve greases were synthesized and evaluated the performance of dropping point and OIT value. And optimized conditions for grease synthesis were selected by SSRED (Six Sigma Robust Engineering Design) using dropping point and OIT value respectively. The optimized grease using OIT value showed longer grease life than that using dropping point. Two greases were synthesized following the optimum synthesis conditions by means of OIT value. Then grease life and other properties of these greases were investigated. These two greasaes showed longer grease life than typical urea/ether oil grease.
Keywords
rolling bearing; grease life; optimum grease; bearing lubrication;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Naka, M. 'Research and Development of Lubrication Grease by NSK,' Motion & Control, No. 3, pp. 1-8, 1997
2 Cann, P. M., Doner, J. P., Webster, M. N. and Wikstrom, V., 'Grease Degradation in Rolling Element Bearings,' Trib. Trans., Vol. 44, No. 3, pp. 399-404, 2001   DOI   ScienceOn
3 Rhee, I. S., 'Development of a New Oxidtion Stbility Test Method for Grease Using a Pressure Differential Scanning Calorimeter,' NLGI's 57th Annual Meeting, TA-052, pp. 2-11, 1990
4 Kim, S. K., Park, C. N., Kim, B. K. and Han, J. D., 'Study on Oxidation Stability and Life of Rolling Bearing Grease,' J. Korean Ind. Eng. Chem., Vol. 15, No. 8, pp. 907-912, 2004
5 Nishimura, M., 'Technology Forecast or the 21st Century,' KOYO Engineering Journal, No. 156E, pp. 4-6, 2000
6 Adach, K., 'Development of Low Noise Long life Lithium Complex Grease,' KOYO Engineering Journal, No. 153E, pp. 50-54, 1998
7 Kim, S. K., Park, C. N. and Han, J. D., 'A Study on Characteristics of the Optimum Urea Type Grease for Rolling Bearings,' Journal of the KSTLE, Vol. 21, No. 1, pp. 21-26, 2005   과학기술학회마을
8 Couronne, I., Vergne, P. and Mazuyer, D., 'Effect of Grease Composition and Structure on Film Thickness in Rolling Contact,' Trib . Trans., Vol. 46, No. 1, pp. 31-32, 2003   DOI   ScienceOn
9 Keller, M. A. and Sara, C. S., 'Behavior of High Temperature Lubricants in a Pressure Differential Scanning Calorimeter,' Tran. Trans., Vol. 41, No. 4, pp. 586-592, 1998
10 Kawamura, T., Minami, M. and Hirata, M., 'Grease Life Prediction for Sealed Ball Bearings,' Trib. Trans., Vol. 44, No. 2, pp. 256-262, 2001   DOI   ScienceOn