A numerical model of ringliner hydrodynamic lubrication was established to study the synergistic lubrication mechanism of surface texture and CuO nanolubricant. The results show that CuO nanolubricant can decrease asperity contact force and reduce wear, but will increase viscous shear force of fluid. The formed wedgeshaped oil film effect between the texture surface of the ring and the liner can promote the hydrodynamic lubrication and effectively reduce the hydrodynamic friction force and thereby reduces the friction loss.However, the asperity contact force increases and the wear intensifies near top and bottom dead centers. The position of surface texture forthe ring affects the tribological performance and the ring textured in the middle has the best effect, which can reduce the friction loss by 5.17% compared with the untextured ring. In addition,there is a synergistic lubrication effect between the surface texture and the CuO nanolubricant.A suitable concentration of nanolubricant and a certain scale of surface texture can reduce the friction loss and the wear of piston ring. In this research, the synergistic lubrication consisting of the ring textured in the middle and the nanolubricant with 0.5% volume of CuO achieves the optimum lubrication performance.
ZHU Shixin
,
YE Xiaoming
,
JIANG Yuze
,
XU Jiwang
,
NIE Fucheng
. Numerical Study on Synergistic Lubrication Characteristics of Textured Ring and CuO Nano-Lubricant[J]. Vehicle Engine, 2019
, 0(3)
: 11
-18
.
DOI: 10.3969/j.issn.1001-2222.2019.03.002
