Research on Lubrication Model of Rock Bit Bearings with Non-Newtonian Medium

DOI: 10.4236/mme.2012.21001   PDF   HTML     4,932 Downloads   9,977 Views   Citations


Lubrication media of rock bit journal bearing is non-Newtonian fluid, and because of structure limitations, lubricant supply is only from the inside track and its rheological properties are relatively complex. In general studies, the non- Newtonianism of lubrication media of rock bit journal bearing is neglected to simplify the research process. Based on the universal Reynolds equation of non-Newton media, the mathematical model of lubrication analysis was suitable for the rock bit bearing working conditions was established. Then according to the experimental results of rheological properties of RB-type lubricating grease, the equivalent viscosity of the model was established and this model can be solved by the method used in solving the Reynolds equation of Newton fluid.

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G. Wang, W. Juan and L. Zhong, "Research on Lubrication Model of Rock Bit Bearings with Non-Newtonian Medium," Modern Mechanical Engineering, Vol. 2 No. 1, 2012, pp. 1-5. doi: 10.4236/mme.2012.21001.

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The authors declare no conflicts of interest.


[1] Y. L. Fu, P. R Yang and J. Zhu, “A Method and Numerical Simulated Study on the Non-Newtonian Lubrication for Journal Bearing,” Journal of System Simulation, Vol. 15, No. 6, 2003, pp. 902-904.
[2] T. A. Osman, “Effect of Lubricant Non-Newtonian Behavior and Elastic Deformation on the Dynamic Performance of Finite Journal Plastic Bearings,” Tribology Letters, Vol. 17, No. 1, 2004, pp. 31-40. doi:10.1023/B:TRIL.0000017416.95176.30
[3] C. Aium-pornsin and M. Mongkolwongrojn, “Influence of Surface Roughness on Elastohydrodynamic Journal Bearings with Non-Newtonian Lubricants,” Advanced Tribology, Part 3, I., 2010, pp. 50-51. doi:10.1007/978-3-642-03653-8_20
[4] S. Ialam, A. Shah, C. Y. Zhou and I. Ali, “Homotopy Perturbation Analysis of Slider Bearing with Powell-Eyring Fluid,” Zeitschrift für Angewandte Mathematik und Physik, Vol. 60, No. 6, 2009, pp. 1178-1193. doi:10.1007/s00033-009-7034-9
[5] N. Kousar and S. Liao, “Series Solution of Non-similarity Boundary-Layer Flows over a Porous Wedge,” Transport in Porous Media, Vol. 83, No. 2, 2010, pp. 379-412. doi:10.1007/s11242-009-9450-x
[6] W.-L. Li, “Derivation of Modified Reynolds Equation: A Porous Media Model with Effects of Electrokinetics,” Journal of Tribology, Vol. 131, No. 3, 2009, Article ID 031701. doi:10.1115/1.3140610
[7] S. Verma, V. Kumar and K. D. Gupta, “Analysis of Multirecess Hydrostatic Journal Bearing Operation with Micropolar Lubricant,” Journal of Tribology, Vol. 131, No. 4, 2009, Article ID 021103, pp. 1-9.
[8] G. R. Wang, “Research on Working Mechanism of Rock Bit Floating Ring Journal Bearings,” Southwest Petroleum University, Chengdu, 2004.
[9] H. P. Jost, “Tribology: The First 25 Years and Byond-Achievements, Shortcomings and Future Tasks,” Industrial Lubrication and Tribology, Vol. 44, No. 2, 1992, pp. 22-27.
[10] P. R. Yang and S. Z. Wen, “A Generalized Reynolds Equation Based on Non-Newtonian Flow in Lubrication Mechanics,” Acta Mechanica Sinica, Vol. 6, No. 4, 1999, pp. 289-295. doi:10.1007/BF02486885
[11] K. S. Wu, “Research on Strength of Three-Dimensional Contact Finite Element in Rock Bit Journal Bearing System,” Southwest Petroleum University, Chengdu, 2003

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