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    杨步超, 吴晨, 安琦. 旋塞取样阀密封面接触力学性能及疲劳寿命研究[J]. 华东理工大学学报(自然科学版), 2022, 48(1): 130-138. DOI: 10.14135/j.cnki.1006-3080.20210126002
    引用本文: 杨步超, 吴晨, 安琦. 旋塞取样阀密封面接触力学性能及疲劳寿命研究[J]. 华东理工大学学报(自然科学版), 2022, 48(1): 130-138. DOI: 10.14135/j.cnki.1006-3080.20210126002
    YANG Buchao, WU Chen, AN Qi. Contact Mechanical Performance and Fatigue Life of Sealing Surface of Plug Sampling Valve[J]. Journal of East China University of Science and Technology, 2022, 48(1): 130-138. DOI: 10.14135/j.cnki.1006-3080.20210126002
    Citation: YANG Buchao, WU Chen, AN Qi. Contact Mechanical Performance and Fatigue Life of Sealing Surface of Plug Sampling Valve[J]. Journal of East China University of Science and Technology, 2022, 48(1): 130-138. DOI: 10.14135/j.cnki.1006-3080.20210126002

    旋塞取样阀密封面接触力学性能及疲劳寿命研究

    Contact Mechanical Performance and Fatigue Life of Sealing Surface of Plug Sampling Valve

    • 摘要: 以旋塞取样阀为研究对象,探讨其密封面接触力学性能和疲劳寿命。应用有关力学理论对旋塞取样阀安装和取样过程进行力学分析,构建了安装过程接触面应力计算的理论模型、旋塞取样阀工作过程中旋塞径向接触应力的计算模型和旋塞表面3个具有代表性的横截面的接触应力分布计算模型。结合具体算例数值计算,研究了取样过程旋塞表面上各点接触应力变化分布规律,并采用有限元法对取样时旋塞接触应力分布进行了分析,结果表明了所建力学模型的正确性。最后基于疲劳寿命的基本理论,研究了管道工作压力、旋塞安装过程的压紧量等参数对旋塞疲劳寿命的影响规律。

       

      Abstract: The contact mechanical properties and fatigue life of plug sampling valve were studied in this paper. The mechanical analysis of the installation and sampling process of the plug sampling valve was carried out by applying the relevant mechanical theories. A theoretical model was established for the contact stress calculation of the contact surface in the installation process. A calculation model was established for the radial contact stress of the plug in the working process of the plug sampling valve. A calculation model was established for calculating the contact stress distribution of three typical cross sections of the plug surface. The contact stress distribution of the plug during sampling was verified by finite element method. Moreover, with a specific example, the variation and distribution of contact stress at each point on the plug surface during the sampling process were numerically calculated and studied. Based on the basic theory of fatigue life, the influences of pipeline working pressure and the amount of pressing in the process of plug installation on the fatigue life of plug were studied.

       

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