接触式机械密封界面泄漏机理研究的关键科学问题

发布时间：2018-11-08 11:50

【摘要】：密封界面的泄漏机理是机械密封研究与应用的焦点问题之一,涉及泄漏通道表征、粗糙表面的接触力学模型、界面微观形貌变化以及介质流体在泄漏通道中的流动阻力等问题。回顾了近几十年国内外接触式机械密封泄漏通道模型的研究,深入分析了G-W模型、M-B模型和Persson模型3种粗糙表面接触力学模型的贡献和存在的问题,提出了一种基于逾渗理论的泄漏通道新模型;探讨了密封界面的分形参数、泄漏通道的流动阻力以及密封界面的有限尺寸效应对泄漏特性的影响,指出孔隙连通贯穿界面和流体流经贯穿通道的流动阻力小是密封界面产生泄漏的成因,以及泄漏通道的形成和泄漏通道内的流体流动特性是泄漏机理研究的主要方向。
[Abstract]:The leakage mechanism of sealing interface is one of the focal points in the research and application of mechanical seal. It involves the characterization of leakage channel, the contact mechanics model of rough surface, the change of microcosmic morphology of interface and the flow resistance of medium fluid in leakage channel. In this paper, the research of contact mechanical seal leakage channel model at home and abroad in recent decades is reviewed, and the contribution and problems of G-W model, M-B model and Persson model are deeply analyzed. A new leakage channel model based on percolation theory is proposed. The effects of fractal parameters of sealing interface, flow resistance of leakage channel and finite size effect of sealing interface on leakage characteristics are discussed. It is pointed out that the formation of leakage channel and the characteristics of fluid flow in leakage channel are the main directions of the research on leakage mechanism, which is caused by the small flow resistance of the pore connected through the interface and the flow through the channel, and the formation of the leakage channel and the fluid flow characteristics in the leakage channel.
【作者单位】：南京林业大学机械电子工程学院;
【基金】：国家自然科学基金项目(51375245,51505230) 江苏省自然科学基金项目(BK20130976) 扬州市工业前瞻性研究计划项目(YZ2014092)~~
【分类号】：TH136

【参考文献】