多孔介质动静压机械密封动力学特性研究

打开文本图片集

关键词：动态系数；多孔介质；L形槽；渗透率；摄动法

中图分类号：TH117.2

DOI：10.3969/j.issn.1004-132X.2025.11.009

Abstract： A porous hydrodynamic and hydrostatic mechanical seal was proposed by combining the po rous material and L grooves（PL-MS）.A dynamic mathematical model of the seal was developed based on the perturbation method，by considering the masstransfer between the fluids in porous matrix and the lubrication films between seal rings，as well as the film cavitation. The perturbed equations were solved with the finite element method and the dynamic coeficients of the porous hydrodynamic and hydrostatic mechanical seal were numerically analyzed. The results show that the PL-MS generates greater film stiffness coefficients Kzz，Kαα，Kββ than those of the ordinary porous mechanical seals and partial distributed porous mechanical seals due to the synergism of the hydrostatic effect of porous matrix and hydrodynamic efect of L grooves. It is a good way to increase the film stiffness coefficients Kzz，Kαα，Kββ by increasing the porous per meability and optimizing the L groove geometrical parameters at the sacrifice of the stiffness coeffcients （204号 Kαβ，Kβα and damp coefficients dzz，dαα，dββ .

Key words： dynamic coeficient; porous matrix; L-groove; permeability; perturbation method

0 引言

机械密封是一种用于解决旋转轴与流体机械壳体之间密封问题的装置，它由至少一对垂直于旋转轴线的端面构成，在流体压力和补偿机构弹力的作用下，这对端面保持贴合并相对滑动，从而实现防止流体泄漏的功能。（剩余14666字）