中国机械工程 ›› 2025, Vol. 36 ›› Issue (11): 2544-2553.DOI: 10.3969/j.issn.1004-132X.2025.11.009

• 机械基础工程 • 上一篇    

多孔介质动静压机械密封动力学特性研究

韩丽云1(), 李学萍1, 孟祥铠1(), 梁杨杨1, 张力豪2, 彭旭东1   

  1. 1.浙江工业大学机械工程学院, 杭州, 310032
    2.蓝箭航天空间科技股份有限公司, 北京, 100176
  • 收稿日期:2024-09-25 出版日期:2025-11-25 发布日期:2025-12-09
  • 通讯作者: 孟祥铠
  • 作者简介:韩丽云,女,1998 年生,硕士研究生。研究方向为流体密封技术。E-mail:1353954026@qq.com
    孟祥铠*(通信作者),男,1980年生,教授、博士研究生导师。研究方向为流体密封技术。E-mail:mengxk@zjut.edu.cn
  • 基金资助:
    国家自然科学基金(52175193);国家自然科学基金重点项目-叶企孙科学基金(U2241246)

Study on Dynamics Characteristics of Porous Matrix Hydrodynamic and Hydrostatic Mechanical Seals

Liyun HAN1(), Xueping LI1, Xiangkai MENG1(), Yangyang LIANG1, Lihao ZHANG2, Xudong PENG1   

  1. 1.School of Mechanical Engineering,Zhejiang University of Technology,Hangzhou,310032
    2.LandSpace Technology Co. ,Ltd. ,Beijing,100176
  • Received:2024-09-25 Online:2025-11-25 Published:2025-12-09
  • Contact: Xiangkai MENG

摘要:

将多孔介质材料与L形流体动压槽相结合,提出了一种多孔介质动静压型机械密封结构,考虑密封端面润滑液膜与多孔介质内流体的传质作用及润滑的空化作用,基于摄动法建立了机械密封的动力学特性数学模型,采用有限单元法求解微扰方程,数值研究了多孔介质动静压型机械密封的动态特性系数。研究结果表明,在多孔介质的静压效应和L形槽的动压效应的协同作用下,相较于多孔介质机械密封和部分多孔介质机械密封,多孔介质动静压机械密封具有更大的刚度系数KzzKααKββ,增大多孔介质材料的渗透率和优化L形槽的几何参数有助于增大液膜的刚度系数KzzKααKββ,但会以牺牲刚度系数KαβKβα 和阻尼系数dzzdααdββ 为代价。

关键词: 动态系数, 多孔介质, L形槽, 渗透率, 摄动法

Abstract:

A porous hydrodynamic and hydrostatic mechanical seal was proposed by combining the porous material and L grooves(PL-MS). A dynamic mathematical model of the seal was developed based on the perturbation method, by considering the mass transfer 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 coefficients of the porous hydrodynamic and hydrostatic mechanical seal were numerically analyzed. The results show that the PL-MS generates greater film stiffness coefficients KzzKααKββ 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 effect of L grooves. It is a good way to increase the film stiffness coefficients KzzKααKββ by increasing the porous permeability and optimizing the L groove geometrical parameters at the sacrifice of the stiffness coefficients KαβKβα and damp coefficients dzzdααdββ .

Key words: dynamic coefficient, porous matrix, L-groove, permeability, perturbation method

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