静压式机械密封结构参数研究及优化设计

Analysis and Optimization of Structure Parameters of Hydrostatic Mechanical Seal

针对一种收敛间隙静压式机械密封,建立流场的数值计算模型。采用有限元方法,在密封闭合力一定的条件下,对端面结构参数对密封性能的影响进行研究。利用MATLAB优化工具箱软件,以最大静态刚度为优化目标,对结构参数进行优化设计。结果表明,密封端面锥角和转折半径均对密封性能有显著影响。通过优化设计,可以得到在一定泄漏量范围内实现最大静态刚度的设计参数。

A theoretical analysis model was developed for a kind of convergent gap hydrostatic mechanical seal.Using the finite element method, under a certain closing force,the effect of sealing surface structure parameters on sealing performance was analyzed.By using the MATLAB optimization toolbox,the optimization of structure parameters was carried out with the target of maximum static stiffness.Results show that the transition radius and cone angle have significant effect on the sealing performance.Through the optimization, the best structure parameters can be got,achieving the maximum static stiffness within a certain range of leakage rate.