The Simulation Of Lubrication System Of Medium-speed Diesel Engine

The role of diesel engine lubrication system is to transport quantitative, clean and hot lubricating oil to the required parts, which is very important for the reliability and durability of the diesel engine. The follows are the function of lubrication system:reducing the wear and tear of the moving parts and reducing the friction work; cooling and clean the lubrication face of the body; sealing some places and reducing vibration; having antirust effect. And for some diesel engines, lubrication system can provide lubricating oil to the follow parts: automatically adjusting fuel injection advance angle device, hydraulic governor, variable compression ratio piston, gas inlet device and so on. At present diesel engine is developing to high strength, which has higher requirement on the lubrication system and its institutions.Traditional lubrication system design method of internal combustion engine is generally experimental design based on experience and experiments, which need long research period, lots of human material and financial resources. In the increasingly competitive market of internal combustion engine, this method can’t meet the development of internal combustion engine today. In1958, the departments of mechanical and computer application, Massachusetts institute of technology put forward computer aided design (CAD), made engineering design and CAD come together. Also due to the development of CAD, the design and research of internal combustion engine have new vitality. Through the introduction of computer simulation for lubrication system research and development we can predict the performance of lubricating oil pump, optimize the lubrication channel and lubrication components, greatly save development time and cost of capital.In this paper according to the actual lubrication oil channel of internal combustion engine, a one-dimensional lubrication system model was build with the Flowmaster software. And the physical parameters are determined by experience parameters and practical parameters, and then simulated in some working conditions of the operation. Then compared the simulation results with the experiment results, found that the two results fit well. So the model’s accuracy is high and can be used as optimization design reference for lubrication system.