Abstract
Establish the piston ring-cylinder liner frictional model using the software of GT-Suite combine both of the frictional condition and lubrication, analyze and compute the thickness of oil film between piston ring and cylinder liner, the distribution of oil stress, and the force and power of the friction in rated condition. Then, mainly analyze the thickness of oil film and power of friction at the first piston ring under different temperatures of lubrication oil and different speeds. The results indicate that: The lubrication effect at first piston ring is poor, and the consumption of frictional power is high. The frictional power is significantly reduced with the oil temperature increases. However, the thickness of the oil film will decrease with the oil temperature increases, which is bad to the lubricational condition. Considering both of the lubrication condition and the frictional power, the frictional characteristics are better when the oil temperature is maintained at 80-90°C. With the increase of rotational speed, the oil film thickness and frictional power increase, but comparing with the influence on the frictional power, the change of rotational speed has less influence on the oil film.
Highlights
Piston ring is one of the most demanding parts of working condition in diesel engine, which withstanding high temperature and high pressure gas, and sliding with a high speed along the cylinder liner, and being constraint for a heavy diesel engine becoming a high power density engine.studying the friction characteristics of piston ring-cylinder liner has the instructive meaning for improving the reliability and life span of diesel engine.Scholars [1-5] conducted an in-depth study on the friction, wear and lubrication between the piston ring and cylinder liner
Studying the friction characteristics of piston ring-cylinder liner has the instructive meaning for improving the reliability and life span of diesel engine
The front of the diesel engine calibration conditions piston ring - cylinder friction characteristics were analyzed and found that the state of the lubricant has a great influence on the friction characteristics, and in the actual work process oil temperature is affected by the cooling system
Summary
Piston ring is one of the most demanding parts of working condition in diesel engine, which withstanding high temperature and high pressure gas, and sliding with a high speed along the cylinder liner, and being constraint for a heavy diesel engine becoming a high power density engine. The analysis model covered kinetics, friction, structural parameters, surface morphology of friction pair, lubricant oil, Axis symmetry and other factors. This paper comprehensively considers the factors of deformation between cylinder liner and piston ring, the surface roughness of contact surface, and the gas leakage caused by the piston ring, combing all of the friction, lubrication and dynamic behaviors and establishes the frictional model of piston ring-cylinder liner using the software of GT-Suite. The frictional characteristics of piston ring and cylinder liner under rated condition was studied by using this model. The influence of oil temperature and rotational speed on the friction characteristics was analyzed.
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