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针对一种收敛间隙静压式机械密封,建立了机械密封流固耦合模型,采用有限元方法求解不可压缩Reynolds方程,得到密封间隙流体压力分布,采用ANSYS有限元软件计算密封组件的弹性变形,利用两者之间自动迭代计算实现流固耦合分析。结果表明,高压工况下,静压式机械密封间隙的压力分布受到密封端面变形的影响,同时又会影响到端面的变形。该流固耦合分析考虑了密封组件之间的接触摩擦和预紧作用,能够准确反映高压流体和密封结构的相互影响。计算得到的泄漏量与实验值吻合,对特殊工况下静压式机械密封的流固耦合研究具有参考意义。
For a convergent gap static pressure mechanical seal, the fluid-solid coupling model of mechanical seal was established. The incompressible Reynolds equation was solved by finite element method. The pressure distribution of seal gap fluid was obtained. The elastic deformation of the seal assembly was calculated by ANSYS finite element software. Automatic iterative calculation between the two to achieve fluid-structure interaction analysis. The results show that the pressure distribution in the static pressure mechanical seal gap is affected by the deformation of the seal face and the deformation of the face under the high pressure condition. The fluid-solid coupling analysis takes into account the contact friction and preload between the seal components and accurately reflects the interaction between the high-pressure fluid and the seal structure. The calculated leakage quantity agrees well with the experimental data, which is of reference significance for the study of fluid-solid coupling of static pressure mechanical seal under special working conditions.