Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-03T12:55:05.719Z Has data issue: false hasContentIssue false
  • English
  • Français

Thermohydrodynamic analysis of a textured sector-pad thrustbearing: effects on mechanical deformations

Published online by Cambridge University Press:  08 August 2014

A. Charitopoulos ,
D. Fouflias ,
C.I. Papadopoulos ,
L. Kaiktsis  and
M. Fillon
A. Charitopoulos*
Affiliation:
School of Naval Architecture and Marine Engineering, National Technical University of Athens, Zografos, Greece
D. Fouflias
Affiliation:
School of Naval Architecture and Marine Engineering, National Technical University of Athens, Zografos, Greece
C.I. Papadopoulos
Affiliation:
School of Naval Architecture and Marine Engineering, National Technical University of Athens, Zografos, Greece
L. Kaiktsis
Affiliation:
School of Naval Architecture and Marine Engineering, National Technical University of Athens, Zografos, Greece
M. Fillon
Affiliation:
Institut Pprime, CNRS – University of Poitiers – ENSMA, Dpt GMSC, Futuroscope Chasseneuil, France
*
a Corresponding author:chpap@central.ntua.gr
Get access

Abstract

In this paper, a computational investigation of thermohydrodynamic performance andmechanical deformations of a fixed-geometry thrust bearing with artificial surfacetexturing is presented. A parallel eight-pad bearing is considered; the surface of eachpad is partially textured with square dimples. Here, a CFD-based thermohydrodynamicmodeling approach, recently introduced by the authors, is used to calculate theperformance of the bearing; the THD results are then used to quantify the deformations ofthe bearing mechanical parts. The bearing is modelled as a sector-shaped channel,consisting of a smooth rotating wall (thrust collar) and a partially textured stationarywall (bearing pad). The bearing performance characteristics are computed by means ofnumerical simulations, based on the numerical solution of the Navier-Stokes and energyequations for incompressible flow, as well as on the solution of the elasticity equationsfor the bearing solid parts. Here, a reference texture geometry is considered, whileproper thermal and structural boundary conditions are implemented. For representative filmthickness values, the effect of rotational speed and collar thickness on bearingperformance is quantified, and the resulting pad and rotor deformation fields arecomputed. It is found that, due to oil heating, the load carrying capacity decreases withrotational speed for values higher that approximately 2000 rpm. The computed rotordeformation field is representative of a fixed support beam, characterized bysubstantially higher levels than those of the bearing pad. Rotor deformations increasesubstantially at low values of collar thickness.

Keywords

Thrust bearingsthermohydrodynamic lubricationmechanical deformationsartificial surface texturing
Type
Research Article
Information
Mechanics & Industry , Volume 15 , Issue 5 , 2014 , pp. 403 - 411
Copyright
© AFM, EDP Sciences 2014

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Papadopoulos, C.I, Efstathiou, E.E., Nikolakopoulos, P.G., Kaiktsis, L., Geometry optimization of textured 3-D micro- thrust bearings, ASME J. Tribology 133 (2011) 041702 CrossRefGoogle Scholar
Cupillard, S., Cervantes, M., Glavatskih, S., Pressure buildup mechanism in a textured inlet of a hydrodynamic contact, J. Tribology 130 (2008) 21701 CrossRefGoogle Scholar
Dobrica, M., Fillon, M., Pascovici, M., Optimizing surface texture for hydrodynamic lubricated contacts using a mass-converging numerical approach, Proc. Institut. Mech. Eng. Part J: J. Eng. Tribology 224 (2010) 737–750 CrossRefGoogle Scholar
R. Van Ostayen, A. Van Beek, R. Munnig-Schmidt, Film height optimization of hydrodynamic slider bearings. In Proceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2007 PART A, 2007, pp. 237–239
Buscaglia, G., Ausas, R., Jai, M., Optimization tools in the analysis of micro-textured lubricated devices, Inv. Prob. Sci. Eng. 14 (2006) 365–378 CrossRefGoogle Scholar
Tonder, K., Effects of skew unidirectional striated roughness on hydrodynamic lubrication. Wear 115 (1987) 19–30 CrossRefGoogle Scholar
Etsion, I., Halperin, G., Brizmer, V., Kligerman, Y., Experimental investigation of laser surface textured parallel thrust bearings, Tribology Lett. 17 (2004) 295–300 CrossRefGoogle Scholar
Sharma, R., Pandey, R., Experimental studies of pressure distributions in finite slider bearing with single continuous surface profiles on the pads, Tribology Int. 42 (2009) 1040–1045 CrossRefGoogle Scholar
Stephens, L., Siripuram, R., Hayden, M., McCrtt, B., Deterministic micro asperities on bearings and seals using a modified LIGA process, J. Eng. Gas Turbines Power 126 (2004) 147–154 CrossRefGoogle Scholar
K. Thomsen, P. Klit, Analysis of a thrust bearing with flexible pads and flexible supports, Proceedings, BALTTRIB 2007 International Scientific Conference, 2007, pp. 174–180
Wang, X., Zhu, J., Li, J., Chen, W., Cai, L., Numerical analysis of elasto-hydrodynamically lubricated point contacts with three dimensional laser micro-texturing asperity, Int. J. Nonlinear Sci. Numer. Simul. 8 (2007) 553–559 CrossRefGoogle Scholar
Rahmani, R., Shirvani, A., Shirvani, H., Optimization of partially textured parallel thrust bearings with square-shaped micro-dimples, Tribology Trans. 50 (2007) 401−406 CrossRefGoogle Scholar
Dadouche, A., Fillon, M., Dmochowski, W., Performance of a hydrodynamic fixed geometry thrust bearing: Comparison between experimental data and numerical results, Tribology Trans. 49 (2006) 419-426 CrossRefGoogle Scholar
Neal, P.B., Heat transfer in pad thrust bearings, Proc. Institut. Mech. Eng. 196 (1982) 216–28 Google Scholar
Ahmed, S., Fillon, M., Maspeyrot, P., Influence of pad and runner mechanical deformations on the performance of a hydrodynamic fixed geometry thrust bearing, Proc. IMech E Part J: J. Eng. Tribology 224 (2009) 305–315 CrossRefGoogle Scholar
Brockett, T.S., Barrett, L.E., Allaire, P.E., Thermoelastohydrodynamic analysis of fixed geometry thrust bearings including runner deformation, Tribology Trans. 39 (1996) 555–562 CrossRefGoogle Scholar
C.I. Papadopoulos, Y. Henry, J. Bouyer, L. Kaiktsis, M. Fillon, Sector-pad Thrust Bearings with Rectangular Dimples: Comparison between Experiments and CFD Thermohydrodynamic Simulations, Proceedings of the 2013 World Tribology Congress, September 8-13, 2013, Turin, Italy
J. Frene, D. Nicolas, B. Degueurce, D. Berthe, M. Godet, Hydrodynamic lubrication: Bearings and thrust bearings. Elsevier, Amsterdam, 1997
F. Incopera, D. De Witt, Fundamentals of heat and mass transfer, 6th edition, John Wiley & Sons, 2006