Influence of Macro-Scale Cylinder Liner Partial Surface Texturing on the Tribological Behavior of Two-Stroke Marine Diesel Engine Piston Ring
Keywords:Piston ring lubrication, partial surface texturing, effect of surface oil groove
In this paper, the influence of cylinder liner partial surface texturing in the top and bottom dead centers proximities was investigated. That influence was compared to full stroke surface texturing in order to evaluate the function of texturing on the surface of cylinder bore of low-speed marine diesel engine to improve the tribological performance of ring-liner pairs. Cylinder liner texturing has been designed in the form of macro-scale circumferential parabolic bottom shape oil grooves, with different depth-to-width ratios and area coverage density. Average Reynolds equation has been applied considering the oil flow factors through the micro asperities. Oil grooves has been numerically represented through the oil film configuration between piston ring and cylinder liner. The solution provides the cyclic average values of friction force of hydrodynamic lubrication, boundary lubrication, and total friction force. Results showed that the partial surface texturing has the superiority in improving tribological behavior of piston ring rather than that associated with full surface texturing.