由于膨胀机碳环密封后面的密封垫片在安装时未被充分压紧,使膨胀机机体及相应管道进油。文章介绍了故障现象和原因分析过程,阐述了处理措施和从中获得的教训。 As the expander carbon ring seal behind the gasket is not fully pressed during installation, so that the expander and the corresponding pipeline into the oil. The article introduces the phenomenon of failure and the reasons for the analysis process, elaborates the treatment measures and the lessons learned from.