Partial EHL analysis of rib-roller end contact in tapered roller bearings

Wang, Wen; Wong, P.L.; Zhang, Z.

doi:10.1016/0301-679x(95)00059-d

Cited by 11 publications

(8 citation statements)

References 11 publications

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“…The model was used to analyse a single row tapered roller bearing. However, these investigations on roller skew are limited in a single row tapered roller bearing [4][5][6][7]. There is little information in either measurement or modelling of the roller skew in a double row tapered bearing.…”

Section: Introductionmentioning

confidence: 99%

On the Measurement of Roller Skew of Tapered Roller Bearings

Falodi

Chen

Caspall

et al. 2012

AMM

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Abstract. Roller skew in roller bearings can cause heat generation and reduce bearing life. Therefore, design to minimise its occurrence is essential in bearing development. This study investigated the roller skew of a double row tapered roller bearing under various running conditions. A new system of measurement using two differential variable reluctance transducers (DVRT) was developed. It is evident that the roller skew of the double row tapered roller bearing can be measured. The shaft rotational speed has a significant effect on roller skew but the radial load has little effect.

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Section: Introductionmentioning

confidence: 99%

On the Measurement of Roller Skew of Tapered Roller Bearings

Falodi

Chen

Caspall

et al. 2012

AMM

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“…A numerical investigation by Jiang et al [11] in 1995 showed the first non-Newtonian thermal spinning result but the use of Jaeger sliding solid pair theory was a limitation for high spinning cases. To be more representative to actual applications, some authors like Wang et al [12] and Colin et al [13] dedicated some specific studies on starvation in the rib-roller end contact. Finally, recent studies [14,15] suspected thermal effects as the main cause of friction changes in spinning EHD contacts, but so far, the non-Newtonian TEHD spinning problem remains numerically unexplored.…”

Section: Introductionmentioning

confidence: 99%

Numerical insight into heat transfer and power losses in spinning EHD non-Newtonian point contacts

Doki-Thonon

Fillot

Vergne

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part J:

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This article focuses on thermal effects and their consequences in elastohydrodynamically lubricated spinning non-Newtonian point contacts. The particular kinematics of spin is of major interest for the understanding of flange contact in bearings (also known as rib-roller end contact) as well as in the field of continuously variable transmission where energetic efficiency is directly related to spin. A versatile finite element thermal non-Newtonian model is presented and results in terms of pressure, film thickness, temperature, heat fluxes, friction, and power losses are discussed. As spin increases, the central and minimum film thicknesses decrease drastically, the contact temperature rises, and the shearing heat source increases. The heat fluxes are totally reorganized in terms of direction and intensity. Friction values in both longitudinal and transverse directions need to be completed with the calculation of the frictional torque due to spin to take into account the total power losses in the contact. This study intends to draw attention to the necessity of an energetic approach when dealing with spinning contacts.

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“…It was also demonstrated that the curvatures of the roller and rib significantly influence the contact conditions. The favorable ratios of the end face radius to the rib radius in the range 0.6 to 0.8 were later confirmed by Wang et al [17] with simulation studies extended to include the effects induced by surface roughness using the flow factor model from Patir and Cheng [18] and the asperity contact model following Greenwood and Tripp [19]. Colin et al [20] investigated the starved EHL rib/roller end contact and indicated effects of contact geometry, load, rotational speed and oil supply conditions on the performance in terms of fluid film height and traction.…”

Section: Introductionmentioning

confidence: 57%

Geometrical Optimization of the EHL Roller Face/Rib Contact for Energy Efficiency in Tapered Roller Bearings

et al. 2021

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In the context of targeted improvements in energy efficiency, secondary rolling bearing contacts are gaining relevance. As such, the elastohydrodynamically lubricated (EHL) roller face/rib contact of tapered roller bearings significantly affects power losses. Consequently, this contribution aimed at numerical optimization of the pairing’s macro-geometric parameters. The latter were sampled by a statistical design of experiments (DoE) and the tribological behavior was predicted by means of EHL contact simulations. For each of the geometric pairings considered, a database was generated. Key target variables such as pressure, lubricant gap and friction were approximated by a meta-model of optimal prognosis (MOP) and optimization was carried out using an evolutionary algorithm (EA). It was shown that the tribological behavior was mainly determined by the basic geometric pairing and the radii while eccentricity was of subordinate role. Furthermore, there was a trade-off between high load carrying capacity and low frictional losses. Thereby, spherical or toroidal geometries on the roller end face featuring a large radius paired with a tapered rib geometry were found to be advantageous in terms of low friction. For larger lubricant film heights and load carrying capacity, spherical or toroidal roller on toroidal rib geometries with medium radii were favorable.

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Partial EHL analysis of rib-roller end contact in tapered roller bearings

Cited by 11 publications

References 11 publications

On the Measurement of Roller Skew of Tapered Roller Bearings

On the Measurement of Roller Skew of Tapered Roller Bearings

Numerical insight into heat transfer and power losses in spinning EHD non-Newtonian point contacts

Geometrical Optimization of the EHL Roller Face/Rib Contact for Energy Efficiency in Tapered Roller Bearings

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