柴电混动舫外机飞轮转子一体化轴系试验及仿真

Experimental and Simulated Investigation on Flywheel Rotor Integrated Shafting of an Outboard Diesel-Electric Hybrid System

为了减小动力系统的体积,将电机的转子集成到发动机的飞轮上,可有效提高柴电混动航外机的集成度,但会造成曲轴受力状态的变化。以某航外机用柴电混动专用柴油机的飞轮转子一体化轴系为研究对象,基于曲轴单元建立有限元仿真模型,并通过曲轴应力试验结果对模型进行标定。对曲轴强度进行分析,得到爆发压力和转速对曲轴各特征点的载荷、应力和强度的影响规律,为提高柴电混动外机的曲轴可靠性提供理论参考和基础数据。

In order to reduce the volume of the power system,the motor rotor is integrated into the engine flywheel,the integration of the outboard diesel-electric hybrid system is effectively improved and the change of crankshaft stress state deterioration is caused.The finite element simulation model of the flywheel rotor integrated shafting of an outboard diesel engine with diesel-electric hybrid is established and calibrated by the crankshaft stress test results,and the crankshaft is studied by the simulation model.By analyzing the strength of the crankshaft,the influence of the load stress and strength of the characteristic points of the crankshaft is obtained under different combustion pressures and engine speeds,which can provide theoretical references and basic data for improving the crankshaft reliability of the outboard diesel-electric hybrid system.