期刊
TRIBOLOGY INTERNATIONAL
卷 154, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2020.106675
关键词
Electrified powertrain; Roller bearings; EHL; Dynamics; Efficiency
资金
- Loughborough University Wolfson School of Mechanical, Electrical and Manufacturing Engineering PhD Studentship Scheme
- AVL List GmbH
Roller bearings play a critical role in electrified powertrains, with elastohydrodynamic lubrication (EHL) thickness increasing with speed. Experimental results show that neglecting the lubricant film in roller-race contact deformation may underestimate roller load.
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 condition for tribological analysis. Results reveal that the EHL film thickness increases from 0.2 to 1.9 mu m 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.
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