Study of the impact of aeration on the lubricant behavior in a tapered roller bearing: Innovative numerical modelling and validation via particle image velocimetry

Maccioni, Lorenzo; Chernoray, Valery; Mastrone, Marco Nicola; Bohnert, Christof; Concli, Franco

doi:10.1016/j.triboint.2021.107301

Cited by 36 publications

(13 citation statements)

References 29 publications

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“…Our modified Flender test could thus be useful for optimizing formulation of deaerating agents for lubricating oils. As well, in recent articles, computational fluid dynamics (CFD) models of lubrication in bearings have been developped, that integrate aeration e↵ects, and eventually provide a better agreement with the data [22,23]. It would then be interesting to couple independent ultrasound measurements of bubble sizes and gas fractions with these numerical developments, to test the validity and improve such numerical solvers.…”

Section: Discussionmentioning

confidence: 99%

Detailed characterization of aeration in lubricating oils by an ultrasonic approach

Zhan

Saint‐Jalmes

Receveur

et al. 2022

Tribology International

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Section: Discussionmentioning

confidence: 99%

Detailed characterization of aeration in lubricating oils by an ultrasonic approach

Zhan

Saint‐Jalmes

Receveur

et al. 2022

Tribology International

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“…The Carreau rheological model is used, and its constitutive equation (Yasuda et al, 1981;Maccioni et al, 2022) is as follows:…”

Section: Rheological Modelmentioning

confidence: 99%

“…Through finite element analysis, the temperature distribution of railway double-row tapered roller bearings under test conditions was investigated (Gao et al, 2022). A computational fluid dynamics (CFD) model was developed to consider effects of aeration on the lubricant behavior in tapered roller bearings (Maccioni et al, 2022). Under angular misalignment, two types of logarithmic crowning models for the roller profile were theoretically designed (Wu et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau model

Liu

Long

et al. 2023

Front. Manuf. Technol.

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The roller end/rib contact of tapered roller bearings significantly affects lubricating condition and power loss. To improve the lubrication performance of the inner ring rib and the large end of the roller in tapered roller bearings used in railway coaches, based on the structural analysis of the inner rib and the large end of the roller and considering spin–slide effects between the rib and the large end of the roller, a thermal elastohydrodynamic lubrication model with a Carreau rheological model was established in a tapered roller bearing. Two kinds of rib structures were provided: the tapered rib and spherical rib. Under different conditions, variations in the friction coefficient versus the ratio of curvature radius of the large end of the roller to that of the rib were compared, and the film thickness and film temperature varied with the rotational speed and the effect of load was compared between the two rib structures. Results showed that spinning motion has little effect on the lubrication at the contact point between the inner ring rib and the large end of the tapered roller. There exists an optimal ratio of the curvature radius between the large end of the roller and the spherical or tapered rib; moreover, the friction coefficient corresponding to this optimal ratio value is the smallest. With the increase in the inner ring speed, both film thickness and temperature increase for the two rib structures. Different from the spherical rib, the difference between the minimum and the central film thickness is almost unchangeable, and the tapered rib shows a slight temperature rise. As the load increases, the difference between the minimum and the central film thickness becomes larger, and the temperature in the contact zone gradually increases for the two ribs. Different from the tapered rib, the lower frictional coefficient and lower minimum film thickness are generated for the spherical rib because of higher film temperature.

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“…Their results indicates that increasing the eccentricity ratio and rotational speed, the value of maximum pressure increases. Further, Maccioni et al 33,34 developed a CFD model that can include aeration. They added a new solution method to OpenFOAM®, which is a free software.…”

Section: Introductionmentioning

confidence: 99%

Effect of bearing shell deformation and ER fluid behavior on two-lobed slot-entry hybrid journal bearing

Sahu,

Sharma,

Tomar

2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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The present article deals with the effects of deformable bearing shells on the performance of lobed slot-entry hybrid journal bearing systems. The influence of the deformation coefficient [Formula: see text] has been studied using the thin liner elasticity model, which measures the flexibility of the bearing liner. Recently, smart fluid, that is, electrorheological (ER) fluid has been used in various tribological systems to obtain better performance. Therefore, the influence of ER lubricant on the bearing performance characteristics has also been studied in this work. Bingham model constitutive relation has been used to analyze the non-Newtonian behavior of ER fluid. The performance of fluid film bearings is greatly influenced by the noncircularity of the bearings. Therefore, the behavior of deformable bearing shells in a slot-entry journal bearing for lobed conditions has also been studied in the present study. The results reveal that considering deformation in the bearing shell reduces the value of frictional torque, whereas the value of stiffness coefficients and stability threshold speed increases. However, ER lubricant enhances the value of film thickness, stiffness/damping coefficients, and stability threshold speed margin.

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Study of the impact of aeration on the lubricant behavior in a tapered roller bearing: Innovative numerical modelling and validation via particle image velocimetry

Cited by 36 publications

References 29 publications

Detailed characterization of aeration in lubricating oils by an ultrasonic approach

Detailed characterization of aeration in lubricating oils by an ultrasonic approach

Thermal EHL analysis of the inner ring rib and roller end in tapered roller bearings with the Carreau model

Effect of bearing shell deformation and ER fluid behavior on two-lobed slot-entry hybrid journal bearing

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