A solution for mixed elastohydrodynamic lubrication modeling considering effects of solid particles and surface roughness

Wang, Gang; Wang, Wei; Zhang, Yi; Shen, Jinwei; Xu, Jimin; Liu, Kun

doi:10.1177/13506501221077777

Cited by 5 publications

(7 citation statements)

References 32 publications

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“…7 To understand and predict the transient tribological dynamics behavior of a tribo-pair, a theoretical model is required. [8][9][10][11][12][13] As a result, numerical models for simulating the dynamic behavior of journal bearing start-up processes have gained popularity in recent years. [14][15][16][17] In recent years, the numerical prediction of bearings during start-up has become increasingly sophisticated.…”

Section: Introductionmentioning

confidence: 99%

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Transient tribo-dynamic performance of journal bearings considering wear behavior during start-up

Wei

Liao

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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The transient tribo-dynamics and wear model are coupled to study the mixed lubrication-wear behavior during start-up. The coupled numerical model involves the film thickness equation with wear depth and a time-varying wear coefficient to account for the impact of transient mixed lubrication behavior on wear. In this study, the evolution of wear and mixed lubrication performance distribution over time is predicted, and the impact of acceleration mode, acceleration time, external load, lubricant viscosity, and start-up time on the numerical predictions is evaluated. The findings demonstrate that wear behavior, particularly in the analysis of the effects of acceleration mode and acceleration time, has a significant impact on the evaluation of the bearing-rotor system's start-up performance and even changes the determination of optimal parameters. Furthermore, the parametric study demonstrates that wear and mixed lubrication performance are sensitive to the external load and lubricant viscosity. Finally, studies on the effect of start-up times show that proper wear geometry promotes hydrodynamic effects, but severely worn bearing surfaces have a negative effect on start-up.

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Section: Introductionmentioning

confidence: 99%

“…7 To understand and predict the transient tribological dynamics behavior of a tribo-pair, a theoretical model is required. 8–13 As a result, numerical models for simulating the dynamic behavior of journal bearing start-up processes have gained popularity in recent years. 14–17…”

Section: Introductionmentioning

confidence: 99%

Transient tribo-dynamic performance of journal bearings considering wear behavior during start-up

Wei

Liao

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Since then, many researchers have made valuable contributions in this field. [6][7][8][9][10] The bearing liner deformation effect was the main topic of numerous studies where scholars investigated the influences of additional factors such as thermal effect, 11,12 cavitation, 13 shaft misalignment, 14 porosity, 15 surface roughness, 16,17 turbulent effect, 18 dynamic loading, 19 and others. The drawn conclusions were that the liner elasticity reduces the pressure and the load-carrying capacity.…”

Section: Introductionmentioning

confidence: 99%

Performance of hydrodynamic textured journal bearing with the combined influence of elastic deformation and pseudo-plastic lubricant

Manser

Khelladi

Deligant

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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This study outlines the performances of finite-length journal bearing with textured liner, shear-thinning Rabinowitsch lubricants, and considers the elastic deformation of the bearing liner. The yielded nonlinear Rabinowitsch-Reynolds PDE system has been solved using the finite difference method combined with Elrod’s algorithm for the case of cylindrical textures. The static performance of hydrodynamic lubrication, in this case, involves different parameters such as depth of texture, eccentricity ratio, elastic deformation factor, rheological index, etc. Results showed that, at a fixed eccentricity ratio, texturing of the bearing’s converging area enhances significantly the load-carrying capacity and reduces the friction coefficient compared to the smooth bearing surface (up to [Formula: see text] in load capacity and [Formula: see text] in friction coefficient). On the other hand, using a lubricant with more pronounced shear-thinning behavior and/or elastic liner reduces the journal bearing performances (up to [Formula: see text] in load capacity and [Formula: see text] in pressure). By applying the optimization technique (particle swarm optimization), an optimal arrangement of textures that can compensate for these losses in performance even at high eccentricity has been found. This optimal texture with dimensionless dimple’s depth set to 1 [Formula: see text] improves the load capacity with [Formula: see text] for a lubricant with a rheological index [Formula: see text] and elastic bearing liner with deformation parameter [Formula: see text].

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“…Some scholars have established dynamic models to further investigate the mechanism of bearing damage caused by impact load (Yan et al , 2020; TU et al , 2021; Wang et al , 2022). The motion and force of the bearing element under impact load are determined by solving the differential equations (Daniel et al , 2017; Balyakin et al , 2020; Chasalevris et al , 2013).…”

Section: Introductionmentioning

confidence: 99%

“…The result of accelerated life experiments under high dynamic loads showed that the dynamic excitations in the experiments reduced bearing life by 80% (Gegner and Nierlich, 2008). Some scholars have established dynamic models to further investigate the mechanism of bearing damage caused by impact load (Yan et al, 2020;TU et al, 2021;Wang et al, 2022). The motion and force of the bearing element under impact load are determined by solving the differential equations (Daniel et al, 2017;Balyakin et al, 2020;Chasalevris et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Analysis of damage evolution and causative factors of outer raceway micromorphology of small needle roller bearings under impact load

Liu

et al. 2022

ILT

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Purpose This paper aims to investigate the damage evolution of bearing raceways under impact conditions from the perspective of three-dimensional (3D) surface morphology changes and to analyze the causal factors with the aid of simulation. Design/methodology/approach An experimental device containing an impact generating mechanism, a transmission mechanism and a torque load is designed for the experiments of impact damage to the outer raceway of a small needle roller bearing HK1208 without an inner ring. Microscopic images and height color maps of each experimental stage were obtained using a 3D laser measurement microscope. The characterization parameters of the surface 3D morphology were extracted and analyzed. Dynamics simulations of the impact condition were performed using the finite element method to investigate the variations and distribution characteristics of the roller forces on the raceway. Findings The changes in roughness and 3D micromorphology show that the surface flattening phenomenon caused by the flattening effect occurs before the surface of the bearing raceway is damaged. The result of dynamic simulations shows that the maximum load of the bearing under the impact state is obviously greater than that under a steady state, and the load distribution under the two conditions is significantly different. Originality/value This paper provides new ideas for analyzing the damage of bearings under impact conditions by analyzing the real 3D morphology of bearing raceways in combination with the finite element method.

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A solution for mixed elastohydrodynamic lubrication modeling considering effects of solid particles and surface roughness

Cited by 5 publications

References 32 publications

Transient tribo-dynamic performance of journal bearings considering wear behavior during start-up

Transient tribo-dynamic performance of journal bearings considering wear behavior during start-up

Performance of hydrodynamic textured journal bearing with the combined influence of elastic deformation and pseudo-plastic lubricant

Analysis of damage evolution and causative factors of outer raceway micromorphology of small needle roller bearings under impact load

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