曲轴齿轮静动载复合工况下弯曲应力及安全系数的计算

过盈装配的柴油机曲轴齿轮,其齿根部除承受工作应力外,还要叠加原始过盈装配应力。工作应力载荷源包括来自喷油泵、配气机构的脉动冲击载荷以及来自水泵、机油泵、发电机的持续载荷。通过对曲轴齿轮静、动载复合工况下齿根承载应力的综合计算,确定了该齿轮零件的弯曲疲劳强度安全系数,为柴油机曲轴齿轮的工程设计提供通用的设计思路及计算依据。

Bending Stress and Safety Factor Calculations of Diesel Engine Crankshaft Gear under Static and Dynamic Loading Condition

The crankshaft gears of diesel engine,which are interference assembled,suffer working stress from the root as well as the original interference assembly stress.The working stress contains pulsant impact loading from fuel pump and valve powertrain,and sustaining loading from water pump,sump and dynamo.The bending stress and safety factor can be determined by integrated calculation of the stress at the gear root under static and dynamic loading condition,and it provides a general design method and calculation gist for engineering design of the crankshaft gear.