理化检验-物理分册2025，Vol.61Issue(4)：47-51,5.DOI:10.11973/lhjy-wl240026
压缩机齿轮轴端齿盘断齿原因
Reason for tooth breakage of the gear shaft end gear disc of the compressor
李明 1刘希德 1李金红 1马宇1
作者信息
- 1. 锦州捷通铁路机械股份有限公司检测中心,锦州 121116
- 折叠
摘要
Abstract
During the service of a certain compressor,the gear shaft end gear disc on the 5th stage impeller side experienced tooth breakage.The cause of the fracture of the shaft end teeth was analyzed using macroscopic observation,chemical composition analysis,mechanical property testing,scanning electron microscopy and energy spectrum analysis,metallographic examination.The results show that the fracture property of the shaft end teeth was fretting fatigue fracture.During service,insufficient pre tightening force during assembly caused the center pull rod to relax,resulting in fretting wear of the tooth surface.Cracks originated from the pits formed by micro motion wear.Under the action of alternating loads,stress concentration occurred at the pits,led to the initiation and propagation of fatigue cracks,ultimately resulted in the fracture of the shaft end teeth.关键词
端齿盘/18CrNiMo7-6钢/接触应力/麻坑/微动疲劳Key words
end gear disc/18CrNiMo7-6 steel/contact stress/pit/fretting fatigue分类
通用工业技术引用本文复制引用
李明,刘希德,李金红,马宇..压缩机齿轮轴端齿盘断齿原因[J].理化检验-物理分册,2025,61(4):47-51,5.
