超临界二氧化碳高压反应釜釜体及密封结构研究

Study on the Autoclave Body and Seal Structure of Supercritical Carbon Dioxide Autoclave

针对用于间歇式微孔发泡的超临界二氧化碳高压反应釜在高压环境中易出现破裂、过量变形以及漏气等问题,根据发泡需要达到的压力、温度以及高压反应釜的结构,运用有限元仿真软件对超临界二氧化碳高压反应釜进行仿真分析,得到反应釜的釜体和密封结构在设计压力(32 MPa)作用下的应力应变云图。研究结果表明:在设计压力作用下,反应釜釜体会产生一定量的变形,但变形量较小,最大应力出现在封头与筒体的连接处,小于材料的屈服极限,满足强度要求;泛塞封封唇处的直径小于弹簧直径,封唇与内壁的接触应力大于设计压力,满足密封要求。

For supercritical carbon dioxide autoclave used for intermittent microcellular foaming in high pressure environment prone to rupture,excessive deformation,leakage and other problems,according to the pressure,temperature required by foaming and the structure of reactor,using finite element simulation software to analysis supercritical carbon dioxide autoclave,obtain the stress and strain of kettle body and sealing structure of reaction kettle under the design pressure(32 MPa).The results show that:under the design pressure,the body of autoclave experience a certain amount of deformation,but the deformation is smaller,the maximum stress occurs at the junction of head and shell,less than the yield limit of the material,meet the strength requirements;the diameter of seal lip on the spring energized seal less than the diameter of the spring.The contact stress of sealing lip and inner wall is greater than the design pressure,meet the requirements of the seal.