几种机械零件的微动磨损失效分析

Study on Failure of Several Mechanical Parts due to Fretting

微动磨损对机械零件运行的可靠性有重要影响。高速柴油机连杆体-连杆盖、柴油机主轴承座-主轴承盖、大型压缩机连杆体-连杆盖以及大型挖掘机斗杆高压油管夹等零件往往会因微动磨损而失效。分析了这些零件的工况及其微动磨损的特征,提出了预防微动磨损失效的措施。

Fretting has significant influence on reliability of mechanical parts in service. Generally, connecting rod- rod cap assembly of high-speed diesel engine, main bearing seat -main bearing cap assembly of diesel engine, connecting rod-rod cap of large-scale compressor , and high-pressure tubing clip of large-scale excavator arm are incapable of performing their intended function due to fretting. The operating state and features of fretting of these parts were analyzed, and some measures avoiding their failure due to fretting were put forward.