基于泄漏率的法兰密封结构垫片参数试验研究

doi:10.3901/JME.2020.21.168

机械工程学报 ›› 2020, Vol. 56 ›› Issue (21): 168-176.doi: 10.3901/JME.2020.21.168

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基于泄漏率的法兰密封结构垫片参数试验研究

刘炎^1,2,3, 陈学东², 范志超², 王璐², 薛吉林²

1. 浙江工业大学机械工程学院杭州 310023;
2. 合肥通用机械研究院有限公司国家压力容器与管道安全工程技术研究中心合肥 230031;
3. 浙江工业大学过程装备及其再制造教育部工程研究中心杭州 310023

收稿日期:2020-04-13 修回日期:2020-07-02 出版日期:2020-11-05 发布日期:2020-12-19
作者简介:刘炎,男,1992年出生。主要研究方向为典型静密封结构密封性能。E-mail:liuyiyan2018@163.com;王璐(通信作者),男,1988年出生,博士,高级工程师。主要研究方向为过程装备静密封技术。E-mail:18505653793@163.com
基金资助:
国家重点研发计划(2017YFF0210405)、国家自然科学基金(51605132)和国机集团重大科技专项(SINOMAST-ZDZX-2017-01)资助项目。

Experimental Research on the Gasket Parameters of Flange Sealing Structure Based on Leakage Rate

LIU Yan^1,2,3, CHEN Xuedong², FAN Zhichao², WANG Lu², XUE Jilin²

1. College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023;
2. National Technical Research Center on Safety Engineering of Pressure Vessel, Hefei General Machinery Research Institute, Hefei 230031;
3. Engineering Research Center of Process Equipment and Remanufacturing, Ministry of Education, Zhejiang University of Technology, Hangzhou 310023

Received:2020-04-13 Revised:2020-07-02 Online:2020-11-05 Published:2020-12-19

摘要/Abstract

摘要： 对于压力容器的法兰密封结构而言,预紧比压y和垫片系数m是其设计时依据的两个重要垫片参数,现行压力容器设计规范ASME VIII卷中给出的y和m取值是经验值,且未能与泄漏率关联。对现有基于泄漏率的垫片参数标准试验方法进行分析,指出了其存在的不足之处,开展了石墨缠绕垫片在不同介质压力、不同加卸载循环下的密封性能试验,提出了一种更加贴合工程实际的垫片参数y和m的试验方法。通过对不同垫片初始表面应力下泄漏率与垫片系数m之间关系的拟合,得到满足不同紧密度等级所要求的y和m值,并对y和m取值进行优化使其更加方便工程应用。新的垫片参数试验方法考虑了y和m之间的关联关系,可更加准确全面地反应垫片特性,为开展基于泄漏率的法兰密封结构设计,降低石化装置泄漏率提供支持。

关键词: 法兰密封结构, 泄漏率, 垫片参数, 石墨缠绕垫片

Abstract: In respect of the pressure vessels, yield factor y and maintenance factor m are two significant gasket parameters for flange design. The values of y and m given in the current ASME VIII code are empirical values and not related to the leakage rate. The shortages of current standard test methods for gasket parameters of flange sealing structure based on leakage rate are analyzed. The sealing performance test of graphite spiral wound gasket under different medium pressure and different loading/unloading cycles is carried out, a more reasonable and practical test method for gasket parameters y and m is proposed. By fitting the relationship between the leakage rate of different initial gasket surface pressure and gasket maintenance factor m, the values of y and m that meet the requirements of different tightness class are obtained, and the values of y and m are optimized to make it more convenient for engineering application. The new gasket parameters test method considers the correlation between y and m, which can reflect the gasket characteristics more accurately and comprehensively, providing support for the design of flange sealing structure based on leakage rate and reducing the leakage rate of petrochemical plant.

Key words: flange sealing structure, leakage rate, gasket parameters, graphite spiral wound gasket

中图分类号:

TB42

刘炎, 陈学东, 范志超, 王璐, 薛吉林. 基于泄漏率的法兰密封结构垫片参数试验研究[J]. 机械工程学报, 2020, 56(21): 168-176.

LIU Yan, CHEN Xuedong, FAN Zhichao, WANG Lu, XUE Jilin. Experimental Research on the Gasket Parameters of Flange Sealing Structure Based on Leakage Rate[J]. Journal of Mechanical Engineering, 2020, 56(21): 168-176.

参考文献

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基于泄漏率的法兰密封结构垫片参数试验研究

Experimental Research on the Gasket Parameters of Flange Sealing Structure Based on Leakage Rate

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