PSA程控阀YX型橡胶密封圈失效分析  

FAILURE ANALYSIS ON THE YX-TYPE RUBBER SEAL IN PSA PROGRAMMABLE VALVE

作　　者：游革新[1] 曾韬[1] 张术宽 郭峰 李茂东 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640 [2]广州特种承压设备检测研究院,广东广州510663

出　　处：《石油化工设备技术》2015年第4期54-56,7-8,共3页Petrochemical Equipment Technology

基　　金：自适应纤维力学松弛机理研究(国家级);项目编号:U143010011

摘　　要：某石化公司在其PSA制氢程控阀上使用的两种YX型丁腈橡胶密封圈先后出现溶胀、失效。通过对上述失效样品形貌特征的观察,同时采用裂解/红外光谱联用仪和裂解/气相色谱/质谱联用仪对其组成进行表征,依据表征结果分析了密封圈失效的原因。研究表明,在PSA阀内介质的各成分中,只有烃类物质的键型、结构和溶度参数与丁腈橡胶、丁苯橡胶相近。因此,第一种样品中丙烯腈含量过少是其能被PSA阀内介质中烃类物质溶胀失效的原因;第二种样品中含有丁苯橡胶是其被介质中烃类物质溶胀失效的原因。Certain petrochemical company adopted two different YX-type nitrile rubber seals on its PSA hydrogen programmable valve and both of them swelled and failed in succession.Based on the observation of the failure exterior characteristic of the two Y-type rubber seal rings on the PSA programmable valve and then analyzing them by pyrolysis/IR spectrometry and pyrolysis/gas chromatography/mass spectrometry respectively,this paper analyzes the failure reasons for the sealing rings.Researches indicate that in PSA hydrogen programmable valve,only hydrocarbons have the similar key-type,structure and solubility parameters to nitrile rubber and styrene-butadiene rubber.Therefore,the first ring swelled and failed because its acrylonitrile content was too small;and the second ring swelled and failed because it contained styrene-butadiene rubber.

关 键 词：橡胶密封圈 丁腈橡胶 丙烯腈 丁苯橡胶 失效分析 

分 类 号：TE96[石油与天然气工程—石油机械设备] TQ336[化学工程—橡胶工业]