Tribo-dynamic analysis of high-speed roller bearings for electrified vehicle powertrains

Questa, Harry; Mohammadpour, Mahdi; Theodossiades, Stephanos; Garner, Colin P.; Bewsher, Stephen R.; Offner, Günter

doi:10.1016/j.triboint.2020.106675

Cited by 22 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…applications [55]. The presented numerical results therefore highlight the importance of elastohydrodynamic micro geometry on electrical discharge erosion wear behaviour.…”

Section: Rough Surface Ehl and Electrical Field Strength Resultsmentioning

confidence: 62%

“…The experimental research of Plazenet et al [46] showed the maximum and average lateral dimension of pits formed through electrical discharge erosion are 4 µm and 1.7 µm diameter respectively. These dimensions are in the same order as the width of the minimum film thickness region rather than the hertzian contact half width for both the conjunctions in this research and for similar bearings in electric vehicle applications [55]. The presented numerical results therefore highlight the importance of elastohydrodynamic micro geometry on electrical discharge erosion wear behaviour.…”

Section: Smooth Surface Ehl and Electrical Field Strength Resultsmentioning

confidence: 67%

See 1 more Smart Citation

Electrical Field Strength in Rough Infinite Line Contact Elastohydrodynamic Conjunctions

2022

View full text Add to dashboard Cite

Rolling element bearings are required to operate in a variety of use cases that determine voltage potentials will form between the rolling elements and races. When the electrical field strength causes the dielectric breakdown of the intermediary lubricant film electrical discharge can damage the bearing surfaces. To reduce the prevalence and severity of electrical discharge machining an improved understanding of the coupled electrical and mechanical behavior is necessary. This paper aims to improve understanding of the problem through a combined elastohydrodynamic and electrostatic numerical study of charged elastohydrodynamic conjunctions. The results show the effect of amplitude reduction means that for typical surface topographies found in EHL conjunctions the maximum field strength is adequately predicted by the elastohydrodynamic minimum film thickness and potential difference. The paper also indicates the width of the elevated electrical field strength region is dependent on EHL parameters which could have important implications on the magnitude of current density during dielectric breakdown.

show abstract

“…applications [55]. The presented numerical results therefore highlight the importance of elastohydrodynamic micro geometry on electrical discharge erosion wear behaviour.…”

Section: Rough Surface Ehl and Electrical Field Strength Resultsmentioning

confidence: 62%

Section: Smooth Surface Ehl and Electrical Field Strength Resultsmentioning

confidence: 67%

Electrical Field Strength in Rough Infinite Line Contact Elastohydrodynamic Conjunctions

2022

View full text Add to dashboard Cite

show abstract

“…The hydrodynamic journal bearing has an extremely wide range of applications in various mechanical transmissions, and its working condition is closely related to the lubrication performance. In the literature [1][2][3][4][5][6][7][8][9][10], the thermoelastic dynamic lubrication of hydrodynamic journal bearings has been studied in detail, and at present, the analysis of the thermal-hydrodynamic lubrication of journal bearings generally uses Reynolds boundary condition for the joint solution of the generalized Reynolds equation. Compared with the Reynolds boundary condition, the mass conservation boundary condition is closer to the experimental results, and it is more reasonable to use it for lubrication analysis.…”

Section: Introductionmentioning

confidence: 99%

Thermal fluid lubrication analysis of hydrodynamic journal bearing based on mass conservation boundary conditions

Zhang

2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The thermal-hydrodynamic lubrication analysis of bearing with different bearing speed and eccentricity was carried out under Reynolds boundary conditions and mass conservation boundary conditions, and the variation of performance parameters such as oil film carrying capacity with speed and eccentricity were analyzed in detail for the calculated results, and the calculation results under the two different boundary conditions were compared and analyzed. The results show that the boundary conditions have a greater influence on the lubrication flow calculation results, the Reynolds boundary conditions have a faster calculation process, and the mass conservation boundary conditions are recommended when focusing on the analysis of lubrication flow.

show abstract

“…Wang et al 16 combined bearing dynamics and thermal EHL method and they found that under a certain bearing speed, the lubrication performance will deteriorate when an inappropriate axial load is applied. Questa et al 17 analyzed the dynamic lubrication characteristics of cross roller bearing (CRB) bearings at high speeds based on the infinite length hypothesis. Pu et al 18 established a point contact mixed-lubrication model, considering the influence of lubrication caused by the angle between the surface velocity vectors of the two contact bodies.…”

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:

View full text Add to dashboard Cite

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.

show abstract

Tribo-dynamic analysis of high-speed roller bearings for electrified vehicle powertrains

Cited by 22 publications

References 25 publications

Electrical Field Strength in Rough Infinite Line Contact Elastohydrodynamic Conjunctions

Electrical Field Strength in Rough Infinite Line Contact Elastohydrodynamic Conjunctions

Thermal fluid lubrication analysis of hydrodynamic journal bearing based on mass conservation boundary conditions

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

Contact Info

Product

Resources

About