Numerical Study on Synergistic Lubrication Characteristics of Textured Ring and CuO Nano-Lubricant

ZHU Shixin; YE Xiaoming; JIANG Yuze; XU Jiwang; NIE Fucheng

doi:10.3969/j.issn.1001-2222.2019.03.002

Vehicle Engine ›› 2019, Vol. 0 ›› Issue (3) : 11-18. DOI: 10.3969/j.issn.1001-2222.2019.03.002

Numerical Study on Synergistic Lubrication Characteristics of Textured Ring and CuO Nano-Lubricant

ZHU Shixin¹,YE Xiaoming²,JIANG Yuze²,XU Jiwang²,NIE Fucheng²

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Abstract

A numerical model of ringliner hydrodynamic lubrication was established to study the synergistic lubrication mechanism of surface texture and CuO nanolubricant. The results show that CuO nanolubricant can decrease asperity contact force and reduce wear, but will increase viscous shear force of fluid. The formed wedgeshaped 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 nanolubricant.A suitable concentration of nanolubricant 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 nanolubricant with 0.5% volume of CuO achieves the optimum lubrication performance.

Key words

piston ring / cylinder liner / surface texture / nanolubricant / tribological performance

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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 https://doi.org/10.3969/j.issn.1001-2222.2019.03.002