摘要
为选择合理的水下装备密封结构形式,对格莱圈、O形圈、X形圈组合和矩形圈在水下环境下的密封性能进行分析。采用ABAQUS软件分别建立4种密封结构的有限元分析模型,研究4种密封结构在预压缩阶段、变压缩率和变外界压力下的等效应力、接触应力和剪切应力变化规律,对比分析4种密封结构的密封性能。研究结果表明:相同的初始压缩率下,矩形圈最大等效应力最大,然后依次是X形圈组合、格莱圈、O形圈,矩形圈最大接触应力和最大剪切应力最大,然后依次是X形圈组合、O形圈、格莱圈,矩形圈在初始压缩阶段具有更好的密封性能;随着初始压缩率和外界压力的增大,格莱圈、O形圈、X形圈组合和矩形圈的最大等效应力、接触应力、剪切应力随之增大,其中矩形圈和X形圈组合的应力增长率较高。矩形圈和X形圈组合在密封能力方面较优,但其等效应力和剪切应力水平过高,容易诱发密封失效;格莱圈和O形圈虽然在密封能力方面不如矩形圈和X形圈组合,但其最大等效应力和最大剪切力较小,故其用作密封时寿命更长。
In order to select a reasonable sealing structure of underwater equipment,the sealing performances of Glyd-ring,O-ring,X-ring combination and rectangular-ring in underwater environment were analyzed.The finite element analysis models of four sealing structures were established by ABAQUS.The change of equivalent stress,contact stress and shear stress of four sealing structures under pre-compression stage,variable compression rate and variable external pressure were studied,and the sealing performances of four sealing structures were compared and analyzed.The results show that under the same initial pre-compression rate,the maximum equivalent stress of the rectangular-ring is the largest,followed by X-ring combination,Glyd-ring and O-ring,and the maximum contact stress and maximum shear stress of rectangular-ring is the largest,followed by X-ring combination,O-ring and Glyd-ring.The rectangular-ring shows better sealing performance in the initial pre-compression stage.With the increase of initial pre-compression rate and external pressure,the maximum equivalent stress,contact stress and shear stress of Glyd-ring,O-ring,X-ring combination and rectangular-ring increase,and the stress growth rate of rectangular-ring and X-ring combination is much higher.The rectangular-ring and X-ring is better in sealing capacity,but its equivalent stress and shear stress are too high,which is easy to induce sealing failure.Although the sealing capacity of Glyd-ring and O-ring is not as good as that of rectangular-ring and X-ring combination,their maximum equivalent stress and shear force are small,so their service life is longer when used as seals.
作者
宋强
张浩
许可
姚晨佼
赵飞虎
SONG Qiang;ZHANG Hao;XU Ke;YAO Chenjiao;ZHAO Feihu(State Key Laboratory of Deep-sea Manned Vehicles,China Ship Scientific Research Center,Wuxi Jiangsu 214082,China;Taihu Laboratory of Deepsea Technological Science,Wuxi Jiangsu 214082,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2022年第12期178-185,共8页
Lubrication Engineering
关键词
格莱圈
密封结构
X形圈
密封性能
压缩率
Glyd-ring
sealing structure
X-ring
sealing performance
compression ratio
