高级检索

    陆俊杰, 吴晨, 安琦. 基于微观接触力学的旋塞阀密封面疲劳寿命数值研究[J]. 华东理工大学学报(自然科学版), 2020, 46(2): 284-292. DOI: 10.14135/j.cnki.1006-3080.20190103001
    引用本文: 陆俊杰, 吴晨, 安琦. 基于微观接触力学的旋塞阀密封面疲劳寿命数值研究[J]. 华东理工大学学报(自然科学版), 2020, 46(2): 284-292. DOI: 10.14135/j.cnki.1006-3080.20190103001
    LU Junjie, WU Chen, AN Qi. Numerical Study on the Fatigue Life of Sealing Surfaces of Plug Valve Based on Micro-Contact Mechanics[J]. Journal of East China University of Science and Technology, 2020, 46(2): 284-292. DOI: 10.14135/j.cnki.1006-3080.20190103001
    Citation: LU Junjie, WU Chen, AN Qi. Numerical Study on the Fatigue Life of Sealing Surfaces of Plug Valve Based on Micro-Contact Mechanics[J]. Journal of East China University of Science and Technology, 2020, 46(2): 284-292. DOI: 10.14135/j.cnki.1006-3080.20190103001

    基于微观接触力学的旋塞阀密封面疲劳寿命数值研究

    Numerical Study on the Fatigue Life of Sealing Surfaces of Plug Valve Based on Micro-Contact Mechanics

    • 摘要: 以旋塞阀为研究对象,基于旋塞阀紧定螺钉和旋塞阀阀芯的变形协调关系模型,建立接触面受力计算模型。基于微观接触力学,采用自相关函数构建微观粗糙表面,建立了考虑旋塞阀密封面微凸体疲劳损伤及密封接触面疲劳寿命的计算方法。以F-2 ISO-STANDARD型旋塞阀为研究对象,研究了旋塞阀接触应力随预紧圈数变化时旋塞阀疲劳寿命与拧紧圈数的数值计算关系。研究表明:旋塞阀密封面的寿命随螺钉拧紧圈数增加而减小,且在相同拧紧圈数下随旋塞阀密封面表面粗糙度增加而增加;旋塞阀密封面的寿命随旋塞压紧力增加而减小,且在相同旋塞压紧力下随旋塞阀密封面表面粗糙度增加而减小;旋塞阀密封面疲劳寿命随管内流体压力幅值比增加而增加,随管内流体极限压力幅值增加而减小,随管内流体平均压力增加先增加后减小,并得出相关定量变化曲线。

       

      Abstract: Taking the plug valve as the research object, calculation model of the contact surfaces was established based on the deformation coupling model between the set screw of the plug valve and the cock. A leak identification algorithm for sealing surface considering fatigue cumulative damage of sealing surface asperities of plug valve was established by analyzing the microscopic contact of the plug valve’s sealing surfaces which are constructed by auto-correlation function. Taking plug valve F-2 ISO-STANDARD (1″) as the research example, the variation of plug valve fatigue life is numerically studied with the change of the number of tightening cycles of the set screw. It was shown that the life expectancy of the sealing surface of the plug valve was decreased with the increase of the numbers of screw tightening cycles, and was increased with the sealing surface roughness at the same tightening cycles. And the life expectancy of the sealing surface of the plug valve was decreased with the increase of the plug compression force, and was decreased with the sealing surface roughness at the same plug compression. The fatigue life of the sealing surface of plug valve was increased with the increase of the ratio of fluid pressure amplitude in the pipe, and was decreased with the increase of the limit pressure amplitude of the fluid in the pipe. The fatigue life of the sealing surface was first increased and then decreased with the increase of the average pressure of the fluid in pipe. This research provides a new method for the prediction of the fatigue life of the valve sealing surface, based on the fluctuation of fluid pressure in the pipe.

       

    /

    返回文章
    返回