螺旋槽干气密封气膜流场数值分析及参数研究

Numerical Analysis and Parameters Research on Spiral Groove Gas Face Seals Fluid Field

基于计算流体动力学(CFD)的动压效应理论,建立了螺旋槽干气密封气膜流场控制微分方程并进行建模,确定了计算区域。根据文献给出的实验数据,采用FLUENT对气膜压力场进行求解,得到了密封计算区域动环端面处气膜压力沿半径方向的分布。本文对干气密封的稳态特性、槽型几何参数对密封性能(泄漏量和气膜刚度)的影响进行分析研究,并结合文献实验数据对螺旋槽干气密封端面槽型参数进行优化,以保证最低泄漏量的同时得到最大气膜刚度,从而为进一步的研究奠定基础。

Based on the dynamic pressure effect theory of computational fluid dynamics(CFD),establishing controlling differential equation and modeling, determining the computational region. According to the experimental datas of the literature, solving the gas film pressure field by adopting FLUENT, obtaining the distribution of the film pressure along the radial direction at the end of the moving ring in the sealed calculation region.This paper studies the performances of gas face seals involved in steady-state performance, groove geometry parameters(mainly leakage and stiffness of gas film) effects of seal parameters,and the optimized spiral groove dry gas seal face groove shape to gain the minimum leakage and the maximum stiffness of gas film, and makes ready for the further research later.