Browse > Article
http://dx.doi.org/10.9725/kstle.2017.33.5.187

Performance of Hydrostatic/hybrid Journal Symmetric/asymmetric Bearings using Slot-entry Restrictor Under Couple Stress Lubricants  

Ram, Nathi (Department of Mechanical and Automation Engineering, Indira Gandhi Delhi Technical University for Women (IGDTUW))
Yadav, Saurabh Kumar (Department of Mechanical Engineering, Graphic Era University)
Sharma, Satish C. (Department of Mechanical and Industrial Engineering, IIT Roorkee)
Publication Information
Tribology and Lubricants / v.33, no.5, 2017 , pp. 187-201 More about this Journal
Abstract
This paper presents the impact of couple stress lubricant on performance of slot-entry hydrostatic/hybrid journal symmetric/asymmetric bearings. Reynolds Equation using Finite Element Technique has been solved for the flow of couple stress and Newtonian lubricants in bearings. The results have been computed for concentric design pressure ratio(${\beta}^{\ast}=0.5$), slot width ratio (SWR = 0.25) and chosen parameters of couple stress lubricant ${\bar{l}}=5$, 10, 15. It is observed that numerically simulated outcomes for slot-entry journal bearings, considering the influence of couple stress lubricant indicate a substantial improvement in the performance of the bearing.
Keywords
Non-recessed journal bearings; couple stress lubricants; slot-entry restrictor; finite element method;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Dee, C. W., Shires, G. L., The current state of the art of fluid bearings with discrete slot inlets, Trans. ASME, J. Lub. Tech., Vol. 93, No. 2, pp. 441-450, 1971.   DOI
2 Rowe, W. B., Koshal, D., Stout, K. J., Slot-entry bearings for hybrid hydrodynamic and hydrostatic operation, J. Mech. Engng. Sc., Vol. 18, No. 2, pp. 73-81, 1976.   DOI
3 Rowe, W. B., Koshal, D., Investigation of recessed hydrostatic and slot-entry journal bearings for hybrid hydrodynamic and hydrostatic operation, Wear, Vol. 43, No. 1, pp. 55-69, 1977.   DOI
4 Rowe, W. B., Koshal, D., A new basis for the optimization hybrid journal bearings, Wear, Vol. 64, pp. 115-131, 1980.   DOI
5 Koshal, D., Rowe, W. B., Fluid-film journal bearings operating in a hybrid mode: Part I -theoretical analysis and design, Trans. ASME J. Lub. Tech., Vol. 103, No. 4, pp. 558-565, 1981.
6 Koshal, D., Rowe, W. B., Fluid-film journal bearings operating in a hybrid mode: Part II - experimental investigation, ASME J. Lub. Tech., Vol. 103, No. 4, pp. 566-572, 1981.
7 Rowe, W. B., Chong, F. S., Computation of dynamic force coefficients for hybrid (hydrostatic/hydrodynamic) journal bearings by the finite disturbance and perturbation techniques, Trans. ASME J. Tribol., Vol. 19, No. 5, pp. 260-271, 1986.
8 Ives, D., Rowe, W. B., The effect of multiple supply sources on the performance of heavily loaded pressurized high-speed journal bearings, Proc., 50 Year of Tribology Conf. London, IMechE., (London), 1987, Paper C 199/87, July 1-3, pp. 121-127.
9 Ives, D., Weston, W., Morton, P. G., Rowe, W. B., A theoretical investigation of hybrid journal bearings applied to high speed heavily loaded conditions requiring jacking capabilities", Proceedings of 15th Leeds- Lyons Symposium on Tribology, September 6-9, 1988, pp. 425-433.
10 Ives, D., Rowe, W. B., The performance of hybrid journal bearings in the superlaminar flow regimes, STLE Tribol. Trans., Vol. 35, No. 4, pp. 627-634, 1992.   DOI
11 Stokes, V. K, Couple stresses in fluids, Phys. Fluids, Vol. 9, No. 9, pp. 1709-1715, 1966.   DOI
12 Ramanaiah, G., and Sarkar, P., Optimum load capacity of a slider bearing lubricated by a fluid with couple stress, Wear, Vol. 49, pp. 61-66, 1978.   DOI
13 Lin, J. R., Lu, F. N., Hung, C. R., Dynamic characteristics of Wide exponential film-shape slider bearings lubricated with a non-newtonian couple stress fluid, J. Marine Sc. Tech., Vol. 14, No. 2, pp. 93-101, 2006.
14 Oladeinde M. H., Akpobi J. A., A comparative study of load capacity and pressure distribution of infinitely wide parabolic and inclined slider bearings, Proc. of World Cong. on Engng., Vol. II, pp. 978-988, 2010.
15 Singh, C., Lubrication theory for couple stress fluids and its application to short bearing, Wear, Vol. 80, pp. 281-290, 1982.   DOI
16 Wang, X. L., Zhu, K. Q., Gui, C. L., A study of a journal bearing lubricated by couple stress fluids considering thermal and cavitation effects, IMechE, Vol. 216, pp. 293-305, 2002.
17 Ma, Y. Y., Wang, W. H., and Cheng, X. H., A study of dynamically loaded journal bearings lubricated with non-newtonian couple stress fluids, Tribol. Letters, Vol. 17, No. 1, pp. 69-74, 2004.   DOI
18 Saini, P. K., Kumar, P., Tandon, P., Thermal elastohydrodynamic lubrication characteristics of couple stress fluids in rolling/sliding line contacts, IMechE, Vol. 221, Part J: J. Engng. Tribol., pp. 141-153, 2007.   DOI
19 Mehta, N. P., Rattan, S. S., Verma, R., Stability analysis of two-lobe hydrodynamic journal bearing with couple stress lubricant, APRN J. Engng. Sc. A., Vol. 5, No. 1, pp. 69-74, 2010.
20 Chang, C. W., Chen, C. K., Nonlinear analysis of a rub-impact rotor supported by turbulent couple stress fluid film journal bearing under quadratic damping, Nonlinear Dyn., Vol. 56, pp. 297-314, 2009.   DOI
21 Jian, C. W. C., Yau, H. T., and Chen, J. L., Nonlinear dynamic analysis of a hybrid squeeze-film dampermounted rigid rotor lubricated with couple stress fluid and active control, Appl. Math. Modelling, Vol. 34, pp. 2493-2507, 2010.   DOI
22 Shires, G. L., Dee, C. W., Pressurized bearings with inlet slots, 1967, Proc. of the 7th Gas Bearing Symposium, UK, Southampton University.
23 Satish, C. Sharma, Nathi Ram, Influence of couple stress lubricant on the performance of orifice compensated non-recessed hole-entry hybrid journal bearing, Proceedings of STLE/ASME International Joint Tribology Conference IJTC2012, 2012, Denver, Colorado, USA, pp. 143-145.
24 Rowe, W. B., Xu, S. X., Chong, F. S., Weston, W., Hybrid Journal Bearings with Particular Reference to Hole-Entry Configurations, Tribol. Int., Vol. 15, No. 6, pp. 339-348, 1982.   DOI
25 Rowe, W. B., Hydrostatic and hybrid bearing design, Butterworth & Co. (Publishers) Ltd., 1983.
26 Stansfield, F. M., Hydrostatic bearings for machine tools and similar applications, machinery (London), 1970.