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非标法兰连接系统结构设计及应力分析 被引量:7

Structural Design and Stress Analysis of Non-standard Flange Connection System
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摘要 法兰、垫片、螺栓连接系统是压力容器及管道设计中的重要内容,同时也是工程设计及使用过程中容易出现问题的关键部位.由于工程应用需要,对公称直径为450 mm的非标管道法兰、垫片、螺栓以及阀门连接系统进行了设计,开发出膨胀石墨和0Cr18Ni10Ti两种材料覆合的新型垫片.同时,将该系统作为一个整体,考虑到法兰旋转、内压对法兰、垫片、螺栓以及阀门的受力与变形的影响,应用三维有限元技术,分析在螺栓预紧过程和加压过程中法兰连接系统的整体应力分布.结果表明,法兰、螺栓等的应力强度满足要求,垫片应力及残余压紧压力满足密封要求,设计的非标法兰连接系统结构合理,应力分布均匀,使用情况良好. The system which consists of flange, gasket, bolt and valve is the important content in the pressure vessel and pipe system design, and it is also the part that produced problem easily during design and operation. As engineering and research needs, the system of non - standard flange of DN450, gasket, bolt and valve is designed. A new type of composite gasket made of expanded graphite and 0Cr18Ni10Ti is developed. Stress distribution in detail of flange and bolt connection system is calculated exactly by using the three dimension finite element technology in bolt pretension and pressureprocess. The results show that stress intensity of flange and bolts meets the requirements, and residual compressive stress of gasket meets sealing requirements. The design of non - standard flanges, gaskets, bolt and valve connection system is reasonable, and stress distribution is uniform.
出处 《郑州大学学报(工学版)》 CAS 2007年第2期60-63,共4页 Journal of Zhengzhou University(Engineering Science)
基金 国家教育部"211"重点学科建设项目 河南省教育厅自然科学研究项目(2007480007)
关键词 法兰 垫片 螺栓连接 结构设计 有限元 应力 flange gasket bolt connect structural design finite element stress
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