中国机械工程 ›› 2026, Vol. 37 ›› Issue (1): 135-146.DOI: 10.3969/j.issn.1004-132X.2026.01.015

• 机械基础工程 • 上一篇    下一篇

高参数CO2混合气体干气密封湍流润滑双向耦合热力变形特性

陈维1,2(), 刘美红2, 邓强国2, 毛文元1, 孙雪剑1, 许恒杰1()   

  1. 1.昆明理工大学化学工程学院, 昆明, 650500
    2.昆明理工大学机电工程学院, 昆明, 650500
  • 收稿日期:2024-10-23 出版日期:2026-01-25 发布日期:2026-02-05
  • 通讯作者: 许恒杰
  • 作者简介:陈维,女,1993年生,博士研究生。研究方向为流体密封技术。发表论文5篇。E-mail: 625371268@qq.com
    许恒杰*(通信作者),男,1989年生,副教授、硕士研究生导师。研究方向为流体密封技术。发表论文20余篇。E-mail: why_551@126.com
  • 基金资助:
    国家自然科学基金(52105189);云南省基础研究计划(202401AT070402);云南省基础研究计划(202401AT070404)

Thermal-mechanical Deformation Characteristics of High Parameter CO2 Mixed Gases Dry Gas Seals under Turbulence Lubrication with a Two-way Coupling Model

CHEN Wei1,2(), LIU Meihong2, DENG Qiangguo2, MAO Wenyuan1, SUN Xuejian1, XU Hengjie1()   

  1. 1.Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming,650500
    2.Faculty of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming,650500
  • Received:2024-10-23 Online:2026-01-25 Published:2026-02-05
  • Contact: XU Hengjie

摘要:

针对高速、高压工况下CO2混合气体干气密封实际气体效应、湍流效应及端面热力变形显著的问题,建立了考虑实际气体与湍流效应的CO2混合气体干气密封双向耦合热力变形模型,采用有限差分法与有限单元法联立求解,分析了CO2混合气体干气密封热力变形行为,探讨了不同运行工况下的湍流效应对密封端面倾斜度的影响规律。结果表明:湍流效应会减小平衡膜厚,升高气膜与密封环温度,且对密封端面力变形的影响较小;低转速下的湍流效应会减小密封端面的热力总变形,高转速工况则相反;高进口压力时,湍流效应可有效增大密封端面间的收敛形间隙;低进口温度时,湍流效应可有效抑制密封端面发散形间隙的形成。

关键词: 干气密封, CO2混合气体, 热力变形, 湍流效应, 倾斜度

Abstract:

To address the challenges of prominent real gas effect, turbulence effect and end-face thermal-mechanical deformations of CO2 mixed gases DGS under high-speed and high-pressure operating conditions, a two-way thermal-mechanical deformation model of CO2 mixed gases DGS was constructed considering turbulence and real gas effects. The model was solved using combined finite difference and finite element methods, and the thermal-mechanical deformation behavior of CO2 mixed gases DGS was analyzed. The influences of turbulence effect on sealing clearance inclinations were discussed under different operating conditions. The results show that turbulence effect decreases the equilibrium film thickness and increases the temperatures of gas film and sealing ring. The impacts of turbulence effect on mechanics deformation of sealing end faces are negligible. At low rotational speed, the turbulence effect reduces the thermal-mechanical deformations of sealing end faces, whereas the opposite occurs at high rotational speed. At high inlet pressure, the turbulence effect effectively increases converging gaps between sealing end faces. At low inlet temperature, the turbulence effect effectively inhibits the formation of divergent gaps between sealing end faces.

Key words: dry gas seal(DGS), CO2 mixed gas, thermal-mechanical deformation, turbulence effect, inclination

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