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

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journal contribution
posted on 24.09.2020, 15:42 authored by Harry QuestaHarry Questa, Mahdi Mohammad-PourMahdi Mohammad-Pour, Stephanos TheodossiadesStephanos Theodossiades, Colin GarnerColin Garner, Rickie Bewsher, Guenter Offner
Roller bearings are critical components in electrified powertrains. At high speeds, the critical role of the elastohydrodynamic lubrication (EHL) cannot be ignored, necessitating a tribo-dynamic analysis. This paper investigates the behaviour of roller bearings under operating conditions present in high-speed electrified powertrains. The bearing motion is obtained experimentally using a novel experimental rig. The bearing centre’s orbital motion is acquired from the experiment and used as the boundary conditions for tribological analysis. Results reveal that the EHL film thickness increases from 0.2 to 1.9 micrometres across a speed range of 0 - 15 000 rpm. A comparison with conventional dry contact analysis shows that roller load can be underestimated if the lubricant film is neglected in the roller-race contact deformation.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Tribology International

Volume

154

Publisher

Elsevier

Version

AM (Accepted Manuscript)

Rights holder

© Elsevier Ltd

Publisher statement

This paper was accepted for publication in the journal Tribology International and the definitive published version is available at https://doi.org/10.1016/j.triboint.2020.106675.

Acceptance date

21/09/2020

Publication date

2020-09-24

Copyright date

2020

ISSN

0301-679X

Language

en

Depositor

Dr Mahdi Mohammad Pour. Deposit date: 22 September 2020

Article number

106675