| Cylinder liner-piston ring is the core component of engine, which its lubricationperformance affects power, economy, emission property and service life of enginedirectly. In recent years, with the development of technology and needs of energyenvironment, engine is oriented to high explosion pressure and high speed, which ledto serious frication and wear of cylinder liner-piston ring. Therefore, it becomes veryimportant to study friction and lubrication performance of cylinder liner-piston ring inmechanism to improve the lubrication condition and reduce the friction loss.The method of combining theoretical calculation with simulation and partexperimental study was used on the study of frication and lubrication performance ofcylinder liner-piston ring. Based on the fluid dynamic pressure lubrication theory, thepaper created fluid lubrication analysis model of cylinder liner-piston ring, whichcombined with the Reynolds equation, micro convex body contact model andReynolds boundary conditions. The influence of factors such as cylinder linerdeformation, variable viscosity effect and variable density effect of lubricating oil andlubrication surface roughness on lubrication performance of cylinder liner-piston ringwas considered in the process of establishment of model.On this basis, the friction of cylinder liner-piston ring was optimized in the paper.With the optimal objective function of total frication power consumption, parameterssuch as dynamic viscosity of lubricating oil, surface roughness and structure of pistonring were carried on optimized design. The results show that, it can improvelubrication condition of cylinder liner-piston ring and reduce its friction losseffectively by optimization design of frication influence factors.Based on wear form-condition simulation principle, a friction and wear tester ofcylinder liner-piston ring was design based on ZH1110diesel engine. Partexperimental study work was carried on friction and wear tester with differentsamples. |
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