基于泄漏率的垫片系数m、y值测试方法研究

发布时间：2018-03-15 11:38

本文选题：螺栓法兰连接　切入点：泄漏率　出处：《华东理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：作为广泛应用于石化、核电行业的可拆卸静密封连接形式的螺栓法兰连接系统,其密封的可靠性越发受到人们的关注。虽然国外提出了许多新的法兰设计方法,但国内广泛应用的压力容器设计方法GB150中关于法兰的设计还是以ASME为基础,采用的垫片系数来源于工程经验,且自上世纪三十年代提出之后没有很大的更新。针对目前快速发展的垫片新材料、新类型,其垫片系数没有统一的测试方法,也没有建立垫片系数和泄漏率的联系。因此,研究基于泄漏率的垫片系数珑、y值的测试方法有助于国内法兰设计方法的完善以及新型密封垫片的规范和安全使用。本文研究介绍了国外主要的螺栓法兰设计方法以及相关的垫片系数及其测试方法,并参考国内泄漏率测量的实验方法,以密封机理研究为基础,设计了基于泄漏率的垫片系数的测量实验方案,并进行了实验装置的设计搭建。以不同测试条件下的泄漏率实验数据为基础,分析研究了垫片系数m及预紧比压y与泄漏率的关系,并进行了曲线拟合,从而得到不同泄漏率下的垫片系数m和预紧比压y的值,另外也给出了法兰设计时针对不同泄漏率要求的垫片系数m、y的建议取值。通过对本文提出的基于泄漏率的垫片系数m、y值与传统垫片系数m、y值(参考GB150-2011)在螺栓法兰连接设计中的应用比较,证明了本文提出的基于泄漏率的垫片系数m、y测试方法和取值的合理性。
[Abstract]:As is widely used in petrochemical, nuclear power industry can be bolted flange connection form static sealing detachable connection system, the reliability of sealing more attention. Although foreign put forward many new method for flange design, but the pressure vessel design method GB150 is widely used in domestic design on flange or on the basis of ASME the gasket coefficient from the engineering experience, and since the last century after the 30s proposed no big update. The new gasket materials, the current rapid development of the new type, the gasket coefficient no uniform testing method, nor the establishment of gasket coefficient and leakage rate. Therefore, the research of gasket leakage rate based on long coefficient the test method, the y value is helpful for the improvement of domestic flange design method and new sealing gasket specifications and safe use.
This paper introduces the design method of bolted flange and gasket foreign main factor and its test method, test method of domestic leak rate measurement and the reference, to study the sealing mechanism as the foundation, designed the measurement experiment scheme based on the coefficient of gasket leakage rate, and set up the design of experimental device. In different test conditions the leakage rate of the basis of the experimental data, analysis of the gasket coefficient m and preload ratio between the pressure y and leakage rate, and the curve fitting, and then different leakage rate of the gasket coefficient m and preload than pressure value of Y, also gives the flange design according to the different leakage coefficient of M gasket rate requirements, recommended values of y. Through the gasket coefficient m leakage rate based on the y value, and the traditional gasket coefficient m, y value (GB150-2011) in the design of bolted flange connection should be used, This paper proves the rationality of the test method and value of the gasket coefficient m based on the leakage rate and the Y test method.

【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ055.8

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