The cam-roller friction pair in the
valve train of commercial vehicle engines belongs to high contact pairs, and
surface wear failure often occurs during operation. On the one hand, under the
elastohydrodynamic lubrication state, the surface of cam-roller bears extremely high oil film pressure and alternating loads,
which makes it susceptible to fatigue wear. On the other hand, due to the
presence of localized micro-protrusion contact and
sliding friction, abrasive wear occurs between the cam and roller, especially
in a slipping state. Traditional research typically evaluates the wear
reliability of cam-roller pair through engine endurance
testing, which is highly time-consuming and costly.
Therefore, based on the coupling modeling of mixed thermal elastohydrodynamic
lubrication and wear process of cam-roller pair, a wear
evolution prediction method for cam-roller pair was
proposed, which realized the prediction of cam-roller
wear depth under cumulative working conditions. Through a 2 000 h engine bench
durability test, it was found that the predicted wear evolution of the cam-roller pair was highly consistent with the experimental results,
proving that the proposed method had the potential to replace high-cost durability tests and predict the wear life of cam-roller.
LI Le, LV Bugao, GAO Honglei, TAO Chunsheng, MENG Xianghui
. Wear Evolution Prediction and Experimental Validation
of Engine Cam-Roller Pair[J]. Vehicle Engine, 2025
, 0(5)
: 1
.
DOI: 10.3969/j.issn.1001-2222.2025.05.001
