Model formulation of churning losses in cylindrical roller bearings based on numerical simulation

Gao, Wenjing; Nélias, Daniel; Boisson, Nicolas; Lyu, Yaguo

doi:10.1016/j.triboint.2018.02.003

Cited by 20 publications

(13 citation statements)

References 12 publications

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“…The authors analyzed numerically one configuration with several in-line finite-length circular cylinders sandwiched by two flat walls, with periodic boundary conditions (Fig. 2) [14], which represents a simplified approach close to the real bearing. Different factors, e.g.…”

Section: Numerical-based Drag and Churning Losses Modelmentioning

confidence: 99%

“…Based on the numerical data, two individual formulations are proposed to evaluate churning moment components on the roller cylindrical surface and two 135 circular ends, respectively. For either the cylindrical surface or the free end, the moment is combined with two parts, the static component (M c0 , M e0 ) which is caused by the roller rotating, and the dynamic component (M cs , M es ) as a result of the roller orbiting along the runway [14]. For the churning moment on the cylindrical surface,…”

Section: Churning Moments On the Rollermentioning

confidence: 99%

“…In the last years, the authors proposed several formulas for the drag force and churning moments prediction in roller bearings, based on a series of numerical investigation [14,15]. In addition, an equation is derived to estimate the oil volume fraction inside the bearing with under-race lubrication, based on the oil/air two-phase flow simulation.…”

Section: Introductionmentioning

confidence: 99%

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Validation and application of a numerical approach for the estimation of drag and churning losses in high speed roller bearings

Gao

Lyu

Liu

et al. 2019

Applied Thermal Engineering

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Section: Numerical-based Drag and Churning Losses Modelmentioning

confidence: 99%

Section: Churning Moments On the Rollermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Validation and application of a numerical approach for the estimation of drag and churning losses in high speed roller bearings

Gao

Lyu

Liu

et al. 2019

Applied Thermal Engineering

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“…6 A smaller amount of oil flow cannot take away all the heat generated by the bearing assemblies in time, while a larger amount of oil flow may cause higher power consumption and excessive parasitic losses. 7 The load-independent churning loss of the bearing is mainly related to the oil-air distribution inside the bearing. 8 In a rolling bearing, the equivalent fluid properties are used to calculate drag and churning effects.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the oil–air distribution inside ball bearings with under-race lubrication

Jiang

Lyu

Gao

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Oil distribution inside the under-race lubricated bearing is crucial for lubrication and cooling of high-speed ball bearings. An under-race lubricated ball bearing is modeled to numerically investigate the effects of operating parameters and feed hole configuration on the distribution behavior of lubricant oil. The results of the numerical simulation indicate that the average oil volume fraction changes with a convex trend as the outer race rotating speed increases, while it changes monotonically with the inner race rotating speed, oil volume flow rate, and oil temperature. The extent of oil spreading on the outer race, cage, ball, and inner race decreases successively. Optimizing the feed hole configuration according to the average oil volume fraction is helpful to achieve precise lubrication of the under-race lubricated ball bearing.

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“…Among the mesh-based methods, most approaches require geometrical, kinematical or physical simplifications. 2 of 14 Simple numerical studies dealing with single rolling elements (e.g., as spheres) or neglecting the relative motion between the elements were published by Noda et al [12], Gonda et al [13], Gao et al [14,15] and Marchesse et al [16].…”

Section: Introductionmentioning

confidence: 99%

Innovative Meshing Strategies for Bearing Lubrication Simulations

2020

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Efficiency improvement is the new challenge in all fields of design. In this scenario the reduction of power losses is becoming more and more a main concern also in the design of power transmissions. Appropriate models to predict power losses are therefore required from the earliest stages of the design phase. The aim of this project is to carry out lubrication simulations of several variants of a cylindrical roller bearing to understand the lubricant distribution and the related churning power losses. Several strategies to reduce the computational effort were used. Among them the sectorial symmetry and three innovative meshing strategies (purely analytical with and without interfaces and analytical/subtractive) that were implemented in the OpenFOAM ® environment. The results of the different approaches were compared among them and reasonable savings in terms of computational effort were shown.

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Model formulation of churning losses in cylindrical roller bearings based on numerical simulation

Cited by 20 publications

References 12 publications

Validation and application of a numerical approach for the estimation of drag and churning losses in high speed roller bearings

Validation and application of a numerical approach for the estimation of drag and churning losses in high speed roller bearings

Numerical investigation of the oil–air distribution inside ball bearings with under-race lubrication

Innovative Meshing Strategies for Bearing Lubrication Simulations

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