活塞压缩机曲轴断裂原因分析

Analysis of Fracture of Compressor Crank Shaft

某厂活塞压缩机曲轴突然断裂,经过应力分析与计算、材质分析与材料性能试验、断口分析和金相组织分析,结果表明,原始缺陷是该曲轴断裂的主要原因,而沿轴向和环向品间裂纹源是裂纹的起因。并提出曲轴除强度设计外,还应注意材料的选择、材料检查和考虑共振等几点建议。

A crank shaft broke suddenly. By means of stress caculating, composition analyzing, per- formance testing, fracture analysis, etc, we obtained the result showed that the initial defect is the main cause, and the lattice crackle in axial and tangential is the original cause. Finally, we proposed that the material selection, checking, and resonance must be considered besides strength designing.