A theoretical investigation on the lubrication mechanism of moving particles in elliptical contact

Huang, Xingbao; Zhang, Xiao; You-qiang, Wang

doi:10.1088/1402-4896/ab8ef0

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…The elastohydrodynamic lubrication (EHL) regime that occurs in a rolling bearing gives rise to small elliptical contact areas between the ball and raceway. Kang et al (2000) and Wang et al (2007) investigated the effect of solid particles on the evolution of the pressure distribution and oil film thickness of EHL by numerical methods, and the Gang Wang, Yi Zhang, Liao, Xu Zhang, Hu and Wei Wang, Journal of Advanced Mechanical Design, Systems, and Manufacturing, Vol.17, No.2, 2023 effect of particle motion on EHL characteristics was further studied (Xu et al, 2018;Huang et al, 2020;Qin et al, 2021). Gabelli et al (2008) evaluated the life of rolling bearings by calculating the rolling EHL contact stress.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the interface topography evolution and vibration monitoring in thrust ball bearings induced by particulate contamination

Wang

Zhang

Liao

et al. 2023

JAMDSM

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Rolling bearings operating in harsh environments are extremely exposed to the risk of exogenous dust or wear debris particles, so there is a strong need to investigate the effects of particulate contamination on bearing operation and to identify problems early. The lubricated oil containing silica particles of various sizes and concentrations are prepared and introduced into thrust ball bearings to replicate the severe operating conditions. Vibration and acoustic emission (AE) signals were measured by accelerometer and AE sensor in a thrust ball bearing test rig. The experimental bearing raceway was observed by scanning electron microscope (SEM) and confocal laser scanning microscopy, and the evolution of the surface topography was analyzed to probe the wear mechanism. The results show that the most severe wear areas occur at the bottom of the bearing raceway, and its degree of wear is significantly influenced by the size and concentration of the silica particles. As the experimental time increases, the raceway surface undergoes an accelerated wear process originating from slight dimples, which leads to bearing failure. Furthermore, the introduction of particles into the lubricant increases surface root mean square (RMS) roughness, vibration and acoustic emission for different experimental durations. The vibration and AE signals are affected by a combination of solid particles and surface wear. The measured monitoring results can provide valuable information about the damage morphologies and subsequently about the state of the bearing during operation.

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Section: Introductionmentioning

confidence: 99%

Experimental study on the interface topography evolution and vibration monitoring in thrust ball bearings induced by particulate contamination

Wang

Zhang

Liao

et al. 2023

JAMDSM

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“…The bearing's load-carrying capacity significantly improved, while the friction coefficient and wear resistance also significantly improved. Huang [15] investigated the influence of nanoparticles on the elliptical contact tribological performance. Their findings demonstrated that the motion of nanoparticles led to an increase in the oil film thickness, providing sufficient separation between the two contact surfaces, thus avoiding substantial wear.…”

Section: Introductionmentioning

confidence: 99%

Wear analysis of rolling bearing contact surfaces based on finite element method

Li,

Tan,

Tao

et al. 2023

Phys. Scr.

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Wear leads to the roughening of bearing surfaces, increased internal clearances, decreased rotational precision, and amplified vibration and noise, ultimately causing the bearing to fail to meet specified performance criteria. This study employs the quasi-static analysis method to examine bearing sliding behavior. Based on the Archard wear model and Hertz contact theory, a computational model for wear depth in lubricated conditions is established for rolling ball bearings, accounting for both the rolling and sliding of the rolling elements. The distribution law of load and wear coefficient along the raceway circumference are analyzed, along with the characteristics of stress and sliding velocity in the contact region. The study investigates the impact of rotational speed, load, surface roughness, and raceway curvature coefficient on the wear coefficient, wear depth, and minimum oil film thickness. Furthermore, sensitivity analysis is conducted on the parameters of the wear depth model. Finite element analysis, utilizing ANSYS Workbench, is employed to study the evolution of surface wear on the raceway of deep groove ball bearings and explore the dynamic relationship between contact stress and wear depth. These findings offer important theoretical guidance for the design, selection, and maintenance of rolling bearings.

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“…Rylander 22 first proposed the theory of liquid-solid lubrication in 1966, which was subsequently further developed by Khonsari. 23 Kang et al 24 investigated the effect of a rigid particle on EHL contacts, and Huang et al 25 analyzed the effects of moving particles on the tribological properties of EHL and contact interface deformation. These studies investigated the effect of particles on load carrying capacity, oil film thickness, friction, and wear in EHL, with the shortcoming that the effect of surface asperities was not considered.…”

Section: Introductionmentioning

confidence: 99%

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

Wang

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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To investigate the effects of solid particles on the point contact mixed lubrication, this paper aims to introduce solid particles into rough interfaces under mixed hydrodynamic lubrication. Statistical three-body micro-contact is utilized in modeling mixed EHL. The model is verified by comparing results without considering particles and roughness with those from classical EHL formula. Factors, such as particle physical parameters, surface roughness and operating condition acting on the system are discussed. The results show that the distribution of hydrodynamic pressure and oil film thickness on the point contact with particles still show typical characteristics of elastohydrodynamic lubrication. The physical parameters of particles and operating condition change the proportion of each part to the load carrying capacity, where an increase in particle size, concentration and surface orientation parameters increases the load ratio of particle and conversely an increase in surface roughness and sliding velocity decreases it. Both an increase in particle size and surface roughness result in an increase in the minimum oil film thickness, with the effect of surface roughness being more significant. In addition, the shear strength, size and concentration of the particles play an important role in the friction characteristics.

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A theoretical investigation on the lubrication mechanism of moving particles in elliptical contact

Cited by 4 publications

References 28 publications

Experimental study on the interface topography evolution and vibration monitoring in thrust ball bearings induced by particulate contamination

Experimental study on the interface topography evolution and vibration monitoring in thrust ball bearings induced by particulate contamination

Wear analysis of rolling bearing contact surfaces based on finite element method

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

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