Viscosity Change and its Effect on Pressure Distribution in Hydrodynamically Lubricated Journal Bearing

Yıl 2019, Cilt: 5 Sayı: 2, 56 - 60, 31.07.2019

İredia Erhunmwun John Akpobı

https://doi.org/10.22399/ijcesen.530596

Öz

In
this work, a parametric study of the change in lubricant viscosity with
pressure variation of fluid (lubricant) in a hydrodynamic journal bearing was
carried out. This study was carried out using the Finite Element Method (FEM)
and this was used to analyse the pressure behaviour of the bearing was
presented using the classical Reynolds Equation. From the result, it was
observed that at the beginning of the bearing where the pressure was equal to
the ambient pressure, the pressure increases thereafter till about 0.01875m where the pressure was at
maximum. From this point to the other trailing end of the bearing, the pressure
decreases to the ambient pressure at L =
0.025m. At the early stage in the bearing, the pressure increase was seen
not to be that significant. This was usually between the ranges of 0 ≤ L ≤ 0.00625m. From this point
onward, the pressure begins to increase significantly. The reverse was the case
when the bearing’s angular displacement was in the range of 180⁰ ≤ L ≤ 360⁰.
The result also shows a linear relationship between viscosity and pressure. The
result obtained when compared with relevant literature shows a strong positive
agreement.

Anahtar Kelimeler

Reynolds Equation, Journal Bearing, Weak Formulation, Viscosity, Finite Element Method

Kaynakça

• [1] O. Reynolds. On the theory of lubrication and its application to Mr. Beauchamps Tower’s Experiments, including an experimental determination of the viscosity of olive oil. Philosophical Transactions of the Royal Society London, 177, pp. 157-23, 1886.
• [2] J. Sep. Three dimensional hydrodynamic analysis of a journal bearing with a two component surface layer. Tribology International, 38, pp. 97-104, 2005.
• [3] R.M. Mane and S. Soni. Analysis of Hydrodynamic Plain Journal Bearing. Expert from the proceedings of the 2013 COSMOL conference in Bangalore.
• [4] G. Tom, K.R. Rajagopal, S. Rolf, and V. Juha. Nonlinear Reynolds equation for hydro dynamic lubrication. 39, pp. 5299-5309, 2015.
• [5] A. Verma, and S.S. Samant. Inspection of Hydrodynamic Lubrication in Infinitely Long Journal Bearing with Oscillating Journal Velocity. Journal of Applied Mechanical Engineering, 5, pp. 1-7, 2016.
• [6] S. Hamdavi, H.H. Ya, T.V.V.L.N. Rao, and K.M. Faez. An analytical approach to investigate the effect of grooved surface on short journal bearing’s performance. ARPN Journal of Engineering and Applied Science, 11(20), pp. 12045-12049, 2016.
• [7] Budynas−Nisbett, Shigley’s Mechanical Engineering Design, Eighth Edition, McGraw-Hill, 2008.
• [8] P.D. Shinde and P.N. Nagare. Experimental Evaluation of Performance Parameters of Journal Bearing Operating in Boundary/ Mixed Lubrication Regimes. International Advanced Research Journal in Science, Engineering and Technology, 2nd International Conference in Advance Mechanical Engineering (ICAME-2016), 3(1), pp. 116-120, 2016.
• [9] Manojkumar, Shamburaje and Rameshwar. CFD analysis of elasto hydro-dynamic lubrication journal bearing using castor oil and bronze material. International Journal of Advance Research and Innovative Ideas in Engineering, 2(2), pp. 56-67, 2016.
• [10] J.N. Reddy, Introduction to the Finite Element Method, Second edition, McGraw-Hill series in Mechanical Engineering. 1993.