The effect of lubricant viscosity on the performance of full ceramic ball bearings

Sun, Jian; Yang, Jiaxing; Yao, Jinmei; Tian, Junxing; Xia, Zhongxian; Yan, Hongwei; Gao, Lei; Li, Songhua; Bao, Zhigang

doi:10.1088/2053-1591/ac4881

Cited by 9 publications

(3 citation statements)

References 23 publications

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“…Sun et al investigated the effects of lubricant viscosity on the vibration and temperature rise of silicon nitride full ceramic angular contact ball bearings under different axial loads and speeds. Their results indicate that at the optimal viscosity value of 32 grade, the vibration and temperature rise of the bearings can be minimized to the greatest extent, with no apparent wear on the contact surfaces (Sun et al, 2022). Hei et al evaluated the friction characteristics of the compression ring-cylinder liner conjunction in engines using lubricating oils of different viscosities.…”

Section: Introductionmentioning

confidence: 99%

Investigation of lubricant viscosity and third-particle contribution to contact behavior in dry and lubricated three-body contact conditions

Chen,

Horng

2024

Front. Mech. Eng.

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The generation of third particles and change in viscosity lead to the gradual degradation of the performance of the machine interface. The generation of third particles may come from wear debris or environmental particles, which form a three-body contact system at the contact interface. The viscosity of the lubricant will also change with the long-term operation of the components. This paper uses a three-body lubrication model to study the influence and interaction of lubricant viscosity change and the presence of third particles on the contact characteristics, including the real contact area, the particle contact area ratio, the solid load percentage, the film thickness, and the evolution of the lubrication regime. The results show that when the interface is in a three-body mixed lubrication regime, the dimensionless total real contact area increases with the increase in particle size and density at the same lubricant viscosity, while the trend is the opposite in dry contact and boundary lubrication interfaces. When viscosity decreases, a three-body contact interface is more prone to entering boundary lubrication than a two-body contact interface, resulting in surface damage. Regardless of surface roughness, particle size, and dry or lubricated contact conditions, the turning point of the contact area (TPCA) phenomenon is usually when the ratio of particle size to surface roughness is 0.8–1.3. Under the same ratio of particle size to surface roughness, the critical load of the TPCA phenomenon increases with the increase in third-particle size and surface roughness, but decreases with the increase in lubricant viscosity and particle density.

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Section: Introductionmentioning

confidence: 99%

Investigation of lubricant viscosity and third-particle contribution to contact behavior in dry and lubricated three-body contact conditions

Chen,

Horng

2024

Front. Mech. Eng.

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“…Zhang et al (2020) proposed a kinetic model of ceramic bearings under limited lubrication conditions and studied the parameters affecting lubrication, which is of guiding significance for improving the performance of ceramic ball bearings. Sun et al (2022) studied the effect of lubricant viscosity on bearing performance and revealed the lubrication mechanism of full ceramic ball bearings. Sun et al (2023a) studied the dynamic characteristics of full ceramic ball bearings under ultra-low temperature conditions and established a model of liquid nitrogen lubrication of full ceramic ball bearings.…”

Section: Introductionmentioning

confidence: 99%

Effect of oil film stiffness on vibration of full ceramic ball bearing under grease lubrication

Sun,

Huang,

Tian

et al. 2024

ILT

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Purpose This paper aims to understand the vibration characteristics of full ceramic ball bearings under grease lubrication, reduce the vibration of the bearings and improve their service life. Design/methodology/approach The Hertz contact stiffness formula for full ceramic ball bearings is constructed; the equivalent comprehensive stiffness calculation model and vibration model of full ceramic ball bearings are established. The dynamic characteristic test of full ceramic ball bearing under grease lubrication was carried out by using the bearing life testing machine, and its vibration was measured, and its vibration acceleration root-mean-square was obtained by software calculation and compared with the simulation results. Findings At the rotational speed of 12,000 r/min, the root-mean-square value of vibration acceleration is maximum 10.82 m/s2, and the error is also maximum 7.49%. As the rotational speed increases, the oil film stiffness decreases. In the radial load of 600 N, the vibration acceleration root-mean-square is minimum 6.40 m/s2, but its error is maximum 6.56%. As the radial load increases, the vibration of the bearing decreases and then increases, so under certain conditions increasing the radial load can reduce the bearing vibration. With different types of grease, the best preload is also different; low-speed heavy load should be used when the viscosity of the grease is large, and high-speed light load should be used when the choice of smaller viscosity grease is made. Originality/value It provides a theoretical basis for the application of full ceramic ball bearings under grease lubrication, which is of great significance for reducing the vibration of bearings as well as enhancing the service life of bearings. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-03-2024-0094/

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“…Sun Jian studied the frictional lubrication performance of full ceramic ball bearings and found that the lubricant film thickness of full ceramic ball bearings was positively correlated with the bearing speed and negatively correlated with the bearing load. Bearing speed has a relatively large effect on the variation of lubricant film thickness (Sun et al , 2022b). Yao Jinmei studied the lubrication mechanism of full ceramic deep groove ball bearings.…”

Section: Introductionmentioning

confidence: 99%

Thermal characteristics and distribution rule of lubrication film of full ceramic ball bearing under different service condition

Sun,

Fang,

Yao

et al. 2023

ILT

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Purpose The study aims to the distribution rule of lubricating oil film of full ceramic ball bearing and improve its performance and life. Design/methodology/approach The paper established an analysis model based on the fluid–solid conjugate heat transfer theory for full ceramic ball bearings. The distribution of flow, temperature and pressure field of bearings under variable working conditions is analyzed. Meanwhile, the mathematical model of elastohydrodynamic lubrication (EHL) of full ceramic ball bearings is established. The numerical analysis is used to study the influence of variable working conditions on the lubricant film thickness and pressure distribution of bearings. The temperature rise test of full ceramic ball bearing under oil lubrication was carried out to verify the correctness of simulation results. Findings As the speed increased, the oil volume fraction in full ceramic ball bearing decreased and the surface pressure of rolling element increased. The temperature rise of full ceramic ball bearings increases with increasing speed and load. The lubricant film thickness of full ceramic ball bearing is positively correlated with speed and negatively correlated with load. The pressure of lubricating film is positively correlated with speed and load. The test shows that the higher inner ring speed and radial load, the higher the steady-state temperature rise of full ceramic ball bearing. The test results are in high agreement with simulation results. Originality/value Based on the fluid–solid conjugate heat transfer theory and combined with Reynolds equation, lubricating oil film thickness formula, viscosity temperature and viscosity pressure formula. The thermal analysis model and EHL mathematical model of ceramic ball bearings are established. The flow field, temperature field and pressure field distribution of the full ceramic ball bearing are determined. And the thickness and pressure distribution of lubricating oil film in the contact area of full ceramic ball bearing were determined. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2023-0126/

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The effect of lubricant viscosity on the performance of full ceramic ball bearings

Cited by 9 publications

References 23 publications

Investigation of lubricant viscosity and third-particle contribution to contact behavior in dry and lubricated three-body contact conditions

Investigation of lubricant viscosity and third-particle contribution to contact behavior in dry and lubricated three-body contact conditions

Effect of oil film stiffness on vibration of full ceramic ball bearing under grease lubrication

Thermal characteristics and distribution rule of lubrication film of full ceramic ball bearing under different service condition

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