几何参数对螺旋密封性能影响的研究

发布时间：2018-05-03 00:32

本文选题：螺旋密封 + CFD　；参考：《华东理工大学》2014年硕士论文

【摘要】：螺旋密封是一种非接触式动压反输型密封,其最大的优点是即使密封部件之间存在较大的间隙也能实现良好的密封。近几十年来,国内已经在核动力、空间装置以及高速离心压缩机等领域成功地应用了螺旋密封。目前,制约螺旋密封发展的主要原因是理论研究不能满足工程应用。为了使现有的克里斯公式更好地反映螺旋密封的密封能力,本文对其进行了改进,引入了粘度因子并考虑了偏心率的影响。另外,采用CFD数值模拟的方法进行了以下两方面的工作： (1)通过理论值和模拟值的对比,验证了本文对克里斯公式的改进具有一定的合理性； (2)研究了密封间隙、槽深、螺纹头数以及相对槽宽等参数对密封性能的影响规律并得出了最佳螺旋参数,为层流条件下螺旋密封结构参数的选择提供了参考。最后,运用灰色关联分析方法研究了参数对密封性能影响程度的大小。
[Abstract]:Spiral seal is a kind of non-contact dynamic pressure reverse transmission seal, its biggest advantage is that even if there is a large gap between the sealing parts, it can also achieve a good seal. In recent decades, spiral seal has been successfully applied in nuclear power, space equipment and high speed centrifugal compressor. At present, the main reason that restricts the development of spiral seal is that the theoretical research can not meet the engineering application. In order to better reflect the sealing ability of spiral seal the existing Chris formula is improved by introducing viscosity factor and considering the influence of eccentricity. In addition, the method of CFD numerical simulation is used in the following two aspects: 1) through the comparison between the theoretical value and the simulation value, it is proved that the improvement of the Chris formula in this paper is reasonable; The influence of sealing clearance, groove depth, number of thread heads and relative groove width on seal performance is studied and the optimum spiral parameters are obtained, which provides a reference for the selection of structural parameters of spiral seal under laminar flow conditions. Finally, the influence of parameters on sealing performance is studied by grey correlation analysis.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB42

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