Modeling lubricant flow between thrust-bearing pads

Wasilczuk, Michał; Rotta, Grzegorz

doi:10.1016/j.triboint.2007.11.007

Cited by 23 publications

(9 citation statements)

References 10 publications

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“…TEHD calculations with the use of computational fluid dynamics (CFD) and FSI procedures are recently becoming more and more popular method of fluid film bearing calculations. [21][22][23][24] The authors of this paper have also started to apply this method for calculations of tilting pad thrust bearings. In general, FSI is coupling finite element method (FEM) software environment for bearing structure calculations and CFD software environment for oil flow calculations.…”

Section: Fsi Proceduresmentioning

confidence: 99%

Large hydrodynamic thrust bearing: Comparison of the calculations and measurements

Wodtke

Schubert

Fillon

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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Hydrodynamic thrust bearings, used to carry axial loads in heavily loaded shafts of water power plants hydro turbines, can reach outer diameters even exceeding 5 m. In such large objects scale effect could be observed. According to this, allowable bearing specific load assuring safe operation of the bearings has to be decreased, which increases thrust bearing dimensions. This effect is caused by excessive thermal deflections of bearing pads, which significantly change oil gap geometry, and in consequence, decreases bearing load-carrying ability. Design of hydrodynamic thrust bearing of large dimensions seems to be a demanding engineering challenge, and additional difficulty comes from limited possibilities of experimental testing of these systems due to high costs. Theoretical investigations, carried out with the use of specially developed computer models, remain a feasible alternative for experimental research. But the accuracy of the models is not often directly validated, because of the lack of appropriate experimental data coming from large objects. In this paper, results of calculations carried out for a large hydrodynamic thrust bearing are shown and compared to measurement data obtained at bearing commissioning stage. Pad temperatures profile sliding surface, oil pressure in hydrodynamic gap and film geometry are compared to the measured values. According to the presented comparisons, some conclusions are drawn with respect to the accuracy of models used to predict large thrust bearing performance.

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Section: Fsi Proceduresmentioning

confidence: 99%

Large hydrodynamic thrust bearing: Comparison of the calculations and measurements

Wodtke

Schubert

Fillon

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…[2], [3] On the other hand, CFD codes were applied to investigate flow phenomena in the lubricating oil and water or in the regions surrounding the bearing, both in journal [4], [7] and thrust bearings. [8] Reliable theoretical prediction of bearing properties requires simultaneous consideration of interacting phenomena such as lubricant flow, heat transfer and the distortion of bearing elements. That is why, fluidstructure interaction technique (FSI) seems to offer promising possibilities for bearing analysis.…”

Section: Introductionmentioning

confidence: 99%

Thermoelastohydrodynamic Behavior of a Journal Bearing With Turbulent Flow

Ouadoud¹,

Benmahjoub²

2019

Topical Problems of Fluid Mechanics 2019

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Turbulence is an irregular fluid motion in which the various flow properties such as velocity and pressure show random variations with time and position. A number of authors proposed different solutions e.g. for pressure distribution, temperature prediction and ThermoHydro-Dynamic "THD" analyses. In a fluid film bearing, the pressure in the oil film satisfies the Reynolds equation which intern is a function of film thickness. In the presented cases of fluidstructure interaction analyses, all important phenomena accompanying bearing operation are considered, e.g. lubricant flow, structure movements and their deformations as well as heat transfer in case of thrust bearing. In this paper, the authors have developed an empirical relationship to determine the effect of lubrication when considering ThermoElastoHydroDynamic "TEHD" lubrication with turbulent flow. The critical point of this work is to import the matrix data (the pressure and temperature fields...) from the fluid domain to the internal surface of the bearing with a precision of the mesh especially in the contact surface. The results presented in the median plane as a function of the bearing angle. A parametric study deals with the influence of rotation speed and the type of turbulence model on the pressure, temperature, deformation and stress intensity fields.

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“…2,3 On the other hand, CFD codes were applied to investigate flow phenomena in the lubricating oil and water or in the regions surrounding the bearing, both in journal [4][5][6][7] and thrust bearings. 8 Reliable theoretical prediction of bearing properties requires simultaneous consideration of interacting phenomena such as lubricant flow, heat transfer and the distortion of bearing elements. That is why, fluid-structure interaction technique (FSI) seems to offer promising possibilities for bearing analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Proc IMechE Part J: J Engineering Tribology 227(8) at NANYANG TECH UNIV LIBRARY on June 9, 2015 pij.sagepub.com Downloaded from…”

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confidence: 99%

Application of the fluid–structure interaction technique for the analysis of hydrodynamic lubrication problems

Wodtke

Olszewski

Wasilczuk

2013

Proceedings of the Institution of Mechanical Engineers, Part J:

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Fluid-structure interaction technique seems to be one of the most promising possibilities for theoretical analysis of lubrication problems. It allows coupling of different physical fields in one computational task, taking into account the interaction between them. In this article, two sets of fluid-structure interaction analyses focusing on the bearing performance evaluation are presented. One analysis was applied to a water-lubricated journal bearing and the other to a hydrodynamic thrust bearing lubricated with oil. Steady-state operation was considered in both cases. In the presented cases of fluid-structure interaction analyses, all important phenomena accompanying bearing operation are considered, e.g. lubricant flow, structure movements and their deformations as well as heat transfer in case of thrust bearing. The problems encountered during modelling are discussed in this article, as well as the results of calculations: hydrodynamic pressures, gap geometries or temperature profiles.

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Modeling lubricant flow between thrust-bearing pads

Cited by 23 publications

References 10 publications

Large hydrodynamic thrust bearing: Comparison of the calculations and measurements

Large hydrodynamic thrust bearing: Comparison of the calculations and measurements

Thermoelastohydrodynamic Behavior of a Journal Bearing With Turbulent Flow

Application of the fluid–structure interaction technique for the analysis of hydrodynamic lubrication problems

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