Jaszak Przemysław, Grzejda Rafał, Kluczyński Janusz, Zmarzły Paweł
Faculty of Mechanical and Power Engineering, Wroclaw University of Science Technology, Wybrzeze Stanislawa Wyspianskiego St. 27, 50-370 Wroclaw, Poland.
Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, 19 Piastow Ave., 70-310 Szczecin, Poland.
Materials (Basel). 2023 Sep 14;16(18):6209. doi: 10.3390/ma16186209.
The article presents the influence of important design parameters of a spiral gasket on axial stiffness and leakage level. These parameters were the angle of inclination of the central part of the spiral section, the length of the vertical part of the spiral section, and the degree of densification of the material filling the metal coils. The scope of work was divided into two stages. In the first, experimental tests were conducted to determine the stiffness and tightness of a standard spiral gasket at two extreme levels of densification of the filler material, and the elastic-plastic properties of expanded graphite, which is the filler material of the metal spirals, were determined. In the second stage, multivariate numerical calculations were carried out to determine the axial stiffness of the gasket and to evaluate the distribution of contact pressure on the sealing surface. A novel aspect of the work is the proposal of a mathematical model to estimate the averaged value of the modulus of elasticity of the filler material as a function of the degree of densification and the execution of an experimental plan that significantly allowed the adoption of a limited number of analysed model variants used in the numerical calculations.
本文介绍了螺旋垫片重要设计参数对轴向刚度和泄漏水平的影响。这些参数包括螺旋部分中心部分的倾斜角度、螺旋部分垂直部分的长度以及填充金属线圈的材料的致密化程度。工作范围分为两个阶段。第一阶段，进行了实验测试，以确定在填充材料的两种极端致密化水平下标准螺旋垫片的刚度和密封性，并测定了作为金属螺旋填充材料的膨胀石墨的弹塑性特性。第二阶段，进行了多变量数值计算，以确定垫片的轴向刚度，并评估密封表面上的接触压力分布。这项工作的一个新颖之处在于提出了一个数学模型，用于估计填充材料弹性模量的平均值作为致密化程度的函数，并执行了一个实验计划，该计划显著允许采用有限数量的数值计算中使用的分析模型变体。
