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ZHAO Yan-feng, PENG Xu-dong, JIANG Jin-bo, CHEN Yuan, ZHAO Wen-jing. Influence of the Pressure-equalizing Groove on the Seal Performance of Hydrostatic Dry Gas Seal[J]. TRIBOLOGY, 2017, 37(5): 677-685. DOI: 10.16078/j.tribology.2017.05.016
Citation: ZHAO Yan-feng, PENG Xu-dong, JIANG Jin-bo, CHEN Yuan, ZHAO Wen-jing. Influence of the Pressure-equalizing Groove on the Seal Performance of Hydrostatic Dry Gas Seal[J]. TRIBOLOGY, 2017, 37(5): 677-685. DOI: 10.16078/j.tribology.2017.05.016
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Influence of the Pressure-equalizing Groove on the Seal Performance of Hydrostatic Dry Gas Seal

  • The MOE Engineering Research Center of Process Equipment and Its Remanufacture, Zhejiang University of Technology, Zhejiang Hangzhou 310032, China

Funds: The project was supported by the National Natural Science Foundation of China (51575490), the National Natural Science Foundation of China (51705458), the National Key Basic ResearchProgram of China (973) (2014CB046404), the Natural Science Key Foundation of Zhejiang Province, China (LZ15E050002), the Natural Science Youth Foundation of Zhejiang Province, China (LQ17E050008) and the General Project Foundation of Zhejiang Province, China(LY18E050026)
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  • Corresponding author:

    PENG Xu-dong, E-mail: xdpeng@126.com, Tel: +86-15958111385

  • Received Date: June 06, 2017
  • Revised Date: July 10, 2017
  • Accepted Date: July 12, 2017
  • Available Online: September 03, 2017
  • Published Date: September 27, 2017
    Graphical Abstract
    • Abstract
  • The pressure-equalizing groove with throttling effect for the hydrostatic dry gas seal (DGS) has the ability of equalizing the gas film pressure.The performance comparison and structure optimization of the typical groove hydrostatic DGS were studied. Based on the hydrostatic gas lubrication theory, the geometric and mathematical model of the circular, ellipse, fan and annular hydrostatic DGS were established, Reynolds equation of the gas film between sealing face was solved by using the finite difference method (FDM), and the pressure distribution and steady seal performance parameters of four kinds of hydrostatic DGS were obtained. The influence of radial groove ratio and circumferential groove ratio on the performance of four kinds of hydrostatic DGS was analyzed. To achieve greater opening force and gas film stiffness, the optimum range of radial groove ratio and circumferential groove ratio of the pressure equalizing groove was obtained. The result shows that when the radial groove ratio was between 0.15 and 0.45, the annular groove DGS had greater opening force and gas film stiffness, while the optimum radial groove ratio for the rest types of hydrostatic DGS was between 0.30 and 0.45. The fan and the elliptical hydrostatic DGS had comparable working performance and their seal performance is inferior to the annular one. When the circumferential groove ratio was between 0.6 and 1.0, the fan hydrostatic DGS can obtain larger opening force and gas film stiffness.
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