Experimental and numerical roller skew in tapered roller bearings

Majdoub, Fida; Saunier, Ludovic; Sidoroff-Coicaud, Christine; Mevel, Bruno

doi:10.1016/j.triboint.2019.106142

Cited by 11 publications

(4 citation statements)

References 15 publications

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“…27 where T B is the bulk temperature (27°C), the subscripts i and b represent the inner raceway and roller, ρ, C, and k are the density, specific heat, and thermal conductivity. In the cases, ρ i and ρ b are 7.865 g/cm 3 , C i and C b are 0.46 N•m/g•°C, k i and k b are 46.0 W/m•°C. The distribution of heat flow is calculated based on the model proposed by Plint.…”

Section: Basic Equationsmentioning

confidence: 95%

“…Zhang et al 2 found that the roller deflection exceeding a certain angle will greatly accelerate the failure of the bearing, through the study of the limit deflection angle of the dry-lubricated tapered roller. Majdoub et al 3 measured the inclination angle of tapered roller bearings through two inductive proximity sensors and found that the inclination angle of the bearing is affected by the axial load of the bearing, input speed, ambient temperature, and lubricant parameters. Duan et al 4 developed a coupled model to investigate the effect of misalignment angle on high-speed cylindrical roller bearings through quasi-static analysis.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the misalignment and modification for crown roller contacts under mixed lubrication

Pei,

Yang

2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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A new contact model of finite-length crowned roller bearing, capable of handling lubrication, eccentric load, and misalignment situations, is established in this study. Simulation results of interface pressure, film thickness distribution, flash temperature, and subsurface stress can be obtained with different speeds, misalignment angles, load eccentricity, and roller trimming parameters. It is found that edge trimming can greatly reduce the stress concentration at the edge, and there are optimal trimming parameters to minimize the concentrated stress under normal load and eccentric load. When the eccentric load exceeds a certain angle, the increase in the maximum stress can be very large, which may lead to premature failure of the interface. Meanwhile, the staggering velocity caused by the misalignment of the roller axis also has a certain influence on the distribution of the lubricating film.

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Section: Basic Equationsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Investigation of the misalignment and modification for crown roller contacts under mixed lubrication

Pei,

Yang

2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Comprehensive analytical models [35,36] account for the tilting and skew of the rolling elements. Skew has the effect of varying the entrainment speed along the length of the roller, and tilt will affect the contact gap.…”

Section: Lubricated Component Level Modelmentioning

confidence: 99%

Tribodynamic Modelling of High-Speed Rolling Element Bearings in Flexible Multi-Body Environments

et al. 2023

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This study presents a new flexible dynamic model for drive systems comprising lubricated bearings operating under conditions representative of electrified vehicle powertrains. The multi-physics approach importantly accounts for the tribological phenomena at the roller–race conjunction and models their effect on shaft-bearing system dynamics. This is achieved by embedding a non-linear lubricated bearing model within a flexible system level model; this is something which has not, to the authors’ knowledge, been reported on hitherto. The elastohydrodynamic (EHL) film is shown to increase contact deflection, leading to increased contact forces and total bearing stiffness as rotational speeds increase. Results show that for a 68 Nm hub motor operating up to 21,000 rpm, the input bearing EHL film reaches a thickness of 4.15 µm. The lubricant entrainment increases the roller–race contact deflection, causing the contact stiffness to increase non-linearly with speed. The contribution of the lubricant film leads to a 16.6% greater bearing stiffness at 21,000 rpm when compared to conventional dry-bearing modelling methods used in current multi-body dynamic software. This new methodology leads to more accurate dynamic response of high-speed systems necessary for the next generation of electrified vehicles.

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“…Because the contact angle is different between the inner and outer raceway, a contact force exists between the large end of the roller and the inner ring rib, and relatively large sliding friction will be generated at the contact zone (Jamison et al, 1976;Majdoub et al, 2020) in tapered roller bearings. Therefore, wear and sliding friction happen easily at the rib, and the load-carrying capacity and service life will be affected.…”

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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Experimental and numerical roller skew in tapered roller bearings

Cited by 11 publications

References 15 publications

Investigation of the misalignment and modification for crown roller contacts under mixed lubrication

Investigation of the misalignment and modification for crown roller contacts under mixed lubrication

Tribodynamic Modelling of High-Speed Rolling Element Bearings in Flexible Multi-Body Environments

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

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