JOURNAL BEARING ANALYSIS WITH SOFT, POROUS LUBRICATION

Duc Hieu NGUYEN, Nicolas HERZIG, Romeo GLOVNEA

Abstract


Widely used in industrial machines and road vehicles, journal bearings play a crucial role in the functionality and longevity of these systems. These cylindrical hydrodynamic bearings rely on pressure-induced fluid films to support radial loads. However, this lubrication mechanism exhibits reduced effectiveness at lower rotational speed. Lubrication of soft, porous medium can address this weakness as it was found that it is able to generate a much higher fluid phase pressure, regardless of the speed. The fundamental idea of this mechanism involves replacing the lubricant film which separates the contacting surfaces with a low elastic modulus, porous layer imbibed with fluid. This study introduces an analytical model of journal bearing’s fluid pressure generation, adapted with the compressible porous theory. 

References


Pascovici, M.D., 1994, Procedure and device for pumping by fluid dislocation, Romanian Patent, 109469.

Pascovici, M.D., 2001, Lubrication by dislocation: a new mechanism for load carrying capacity, In: Proceedings of the 2nd World Tribology Congress, Vienna, 41–44.

Pascovici, M.D., 2007, Lubrication Processes in Highly Compressible, Porous Layers, In: Lubrification et tribologie des revêtements minces, Poitiers, France, 22-23 May.

Feng, J., Weinbaum, S., 2000, Lubrication theory in highly compressible porous media: the mechanics of skiing, from red cells to humans, J. Fluid Mech., 422, 281-317. DOI: https://doi.org/10.1017/S0022112000001725

Wu, Q., Igci, Y., Andrepoulos, Y., Weinbaum, S., 2006, Lift mechanics of downhill skiing and snowboarding, ACSM J. Med. Sci. Sports Exerc., 38(6), 1132–46. DOI: https://doi.org/10.1249/01.mss.0000222842.04510.83.

Wu, Q., et al., 2004, From red cells to snowboarding: a new concept for a train track, Phys. Rev. Lett., 93(19), 194501. DOI: https://doi.org/10.1103/PhysRevLett.93.194501

Gacka, T., Zhu, Z., Crawford, R., et al., 2017, From red cells to soft lubrication, an experimental study of lift generation inside a compressible porous layer, J. Fluid Mech., 818, 5-25. DOI: https://doi.org/10.1017/jfm.2017.133.

Zhu, Z., Nathan, R., Wu, Q., 2018, An experimental study of the lubrication theory for highly compressible porous media, with and without lateral leakage, Tribol. Int., 127, 324-332. DOI: https://doi.org/10.1016/j.triboint.2018.06.016.

Zhu, Z., Nathan, R., Wu, Q., 2019, Multi-scale soft porous lubrication, Tribol. Int., 137, 246-253. DOI: https://doi.org/10.1016/j.triboint.2019.05.003.

Zhu, Z., Weinbaum, S., Wu, Q., 2019, Experimental study of soft porous lubrication, Phys. Rev. Fluids, 4(2), 024305. DOI: https://doi.org/10.1103/PhysRevFluids.4.024305.

Kunik, S., Fatu, A., Bouyer, J., Doumalin, P., 2020, Experimental and numerical study of self-sustaining fluid films generated in highly compressible porous layers imbibed with liquids, Tribol. Int., 151, 106435. DOI: https://doi.org/10.1016/j.triboint.2020.106435.

Cameron, A., 1966, The Principles of Lubrication, Longmans.

Turtoi, P., Cicone, T., Fatu, A., 2016, Experimental and theoretical analysis of (water) permeability variation of non-woven textiles subjected to compression, Mechanics & Industry, 18, 307. DOI: https://doi.org/10.1051/meca/2016048.

Lundström, T.S., Toll, S., Håkanson, J.M., 2002, Measurement of the Permeability Tensor of Compressed Fibre Beds, Transp. Porous Media, 47(3), 363-80. DOI: https://doi.org/10.1023/A:1015511312595


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