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对往复式压缩机的进气阀连接螺栓断裂失效情况进行分析,通过对其断口形貌、化学成分、力学性能和金相组织进行检测分析,发现螺栓的失效原因是在交变载荷的长期作用下,螺纹根部存在的原始缺陷以及紧固螺母与设备结合处螺铨的螺纹根部存在应力集中现象,使该部位形成裂纹源,最终螺栓发生疲劳断裂。
The fracture failure of the connecting bolt of the inlet valve of the reciprocating compressor was analyzed. Through the analysis of its fracture morphology, chemical composition, mechanical properties and microstructure, it was found that the failure cause of the bolt was the long-term effect of alternating load , The original defects existing in the root of the screw thread and the stress root at the root of the screw nut at the joint of the fastening nut and the equipment exist stress cracks, so that the crack source is formed in the part, and finally the fatigue fracture of the bolt occurs.