Material modeling and optimization of rough elliptic bore journal bearing

Pradhan, Sushanta Kumar; Kumar, Ramanuj; Mishra, Prakash Chandra

doi:10.1016/j.matpr.2020.11.174

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…The local film viscosity can thus be very high and have a strong influence on the hydrodynamic pressure generation in the bearing owing to the fluid piezo‐viscous effect. Although a lot of theoretical and experimental researches have been made on hydrodynamic journal bearings [6–11], the study is still lacking on the hydrodynamic journal bearing with low clearances by considering the combined effects of surface roughness, physically adsorbed layer and fluid piezo‐viscous property.…”

Section: Introductionmentioning

confidence: 99%

“…The local film viscosity can thus be very high and have a strong influence on the hydrodynamic pressure generation in the bearing owing to the fluid piezo-viscous effect. Although a lot of theoretical and experimental researches have been made on hydrodynamic journal bearings [6][7][8][9][10][11], the study is still lacking on the hydrodynamic journal bearing with low clearances by considering the combined effects of surface roughness, physically adsorbed layer and fluid piezo-viscous property. Xie et al [12] analyzed the performance of the hydrodynamic journal bearing with very low clearances where physically adsorbed layer boundary lubrication and continuum film hydrodynamic lubrication simultaneously occur, respectively, in different areas.…”

Section: Introductionmentioning

confidence: 99%

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Combined effects of surface roughness and physically adsorbed layer in hydrodynamic journal bearing with multiscale approach

Zhang

2023

Z Angew Math Mech

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Numerical calculations were made for the film pressure and carried load of the hydrodynamic journal bearing with very large eccentricity ratios, that is, very low clearances when the combined effects of surface roughness and physically adsorbed layer were considered. The shaft was rotating with perfectly smooth surface, and the sleeve was stationary with the nanoscale sinusoidal surface roughness. The fluid piezo‐viscous effect was also incorporated. Owing to the coexistence of the nanoscale adsorbed layer and the macroscopic intermediate continuum fluid film, the multiscale approach was used to simultaneously solve this sandwich film lubrication problem. It was found that owing to low bearing clearances the effect of the adsorbed layer normally very significantly increases the lubricant film pressure, depending on the fluid‐bearing surface interaction; While at the same time both the surface roughness effect and the fluid piezo‐viscous effect are particularly significant compared to those classically calculated, owing to the local more severe film squeezing and the resulting local higher pressures. By considering the effect of the adsorbed layer, the surface roughness more significantly increases the load‐carrying capacity of the journal bearing for very large eccentricity ratios, especially for a strong fluid‐bearing surface interaction. It is suggested that in modeling the hydrodynamic journal bearing for large eccentricity ratios, the combined effects of the surface roughness, physically adsorbed layer and fluid piezo‐viscous property should be considered.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Combined effects of surface roughness and physically adsorbed layer in hydrodynamic journal bearing with multiscale approach

Zhang

2023

Z Angew Math Mech

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Research and prospect of textured sliding bearing

Song

Yang

Dong

et al. 2022

Int J Adv Manuf Technol

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Grey-Fuzzy Hybrid Optimization for Thermohydrodynamic Performance Prediction of Misaligned Rough Elliptic Bore Journal Bearing

2022

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Rough elliptic bore misaligned journal bearing performance involves many geometric and operational parameters, which directly or indirectly affect the thermohydrodynamic performance output. Improper design and manufacturing of journal bearings lead to enhanced friction, reduced operational life, and poor serviceability. A rule of thumb is to understand the operational efficiency of the bearing through modelling and simulation and to implement the knowledge of bearing critical parameters in manufacturing and operation. Therefore, decision-making in bearing parameter selection is a crucial process, for which several optimization tools and techniques have been developed from time to time. Moreover, these techniques have their own merits and demerits. This paper proposes a grey-based fuzzy approach to optimize the thermohydrodynamic performance of journal bearings with roughness, bore non-circularity, and shaft misalignment. Based on the results, the optimal level of factors is ε1 (0.3)-β1 (0.5)-G3 (2)-y1 (0.1), while at this condition, the optimal solutions for responses, such as Wis, Wth, Fis, Fth, Qis, and Qth are 3.684, 2.84, 165.2, 178.3, 5.67, and 6.32, respectively.

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Material modeling and optimization of rough elliptic bore journal bearing

Cited by 3 publications

References 14 publications

Combined effects of surface roughness and physically adsorbed layer in hydrodynamic journal bearing with multiscale approach

Combined effects of surface roughness and physically adsorbed layer in hydrodynamic journal bearing with multiscale approach

Research and prospect of textured sliding bearing

Grey-Fuzzy Hybrid Optimization for Thermohydrodynamic Performance Prediction of Misaligned Rough Elliptic Bore Journal Bearing

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