Based on the traditional lubrication model

many factors such as piston ring lubrication characteristics

piston ring dynamics

lubricant transport

piston ring blow-by

geometric structure parameters

cylinder liner deformation and solid abrasive particle were coupled to establish an oil supply lubrication model specially designed for the structure and oil supply of low speed two stroke marine diesel engines

and the blow-by between piston rings and the unique surface texture and oil groove structure of cylinder liner were studied. Results show that the piston ring of low-speed marine diesel engines spans the three areas of dynamic lubrication

mixed lubrication and boundary lubrication over the stroke

which makes the supply conditions of lubricating oil and the presence of solid abrasive particles directly affect the lubrication state of piston ring-cylinder liner tribo-pair.