中文摘要：

为了解决M型高压水泵曲轴断裂的问题,在对M泵曲轴断裂情况进行充分分析的基础上,应用Ansys有限元对曲轴进行了受力分析,通过仿真分析发现其应力集中严重的部位与断裂部位重合,同时根据实际的断裂情况对曲轴倒角的设计进行了仿真计算,重新确定了倒角的大小。为了进一步验证断裂的情况,应用解析法对其断裂截面的疲劳强度进行了校核计算,计算结果表明,原4 mm倒角情况下曲轴的疲劳强度安全系数低于许用安全系数,改进为8 mm倒角后疲劳强度安全系数满足设计要求。在此基础上对M泵的曲轴进行了改进设计,改进后的应用效果显著,解决了困扰企业的曲轴断裂问题。

英文摘要：

In order to solve the problems of M-pressure pump crankshaft fracture,full analysis of the M-pump caranshaft fracture was congducted. On this basis,stress analysis was carried out on the crankshaft by ANSYS. Through simulation analysis found that severe stress concentration sites coincide with the cleavage site,and conducted a simulation influence on the fracture of the crankshaft chamfer,and re-determine the size of the chamfer. To further verify the situation fracture,the fatigue strenth of frature section were checking calculation by analtical method. The results show,fatigue strength safety factor below allowable safety factor under the original conditions of the crankshaft 4mm chamfer,and fatigue strength safety factor to meet the design requirements in the case of 8mm chamfer. Improved design was performed according to the results of the simulation and calculation of the crankshaft,and applications significant effect,solved the problem of crankshaft fracture.