【作者】 张国渊；

【导师】 陈国定；

【作者基本信息】 西北工业大学 ， 机械设计及理论， 2004， 硕士

【摘要】 作为一种非接触式并且能达到“零泄露”的新型密封型式，螺旋槽密封在航天航空和石油化工等领域的应用越来越广泛。在气相螺旋槽密封理论及应用日益成熟的条件下，液相螺旋槽密封也亟待取得进一步的发展，以便满足在特殊工况条件下的应用要求。目前国内关于液相端面开螺旋槽的机械密封研究工作非常有限，本课题论文目的就是通过探讨端面间薄膜密封的机理和密封性能，从而为进一步的研究奠定基础。 为此，在综合国内外的大量文献资料的基础上，本文着重从液相螺旋槽密封的密封机理及性能等几个方面进行分析研究。 首先通过对螺旋槽密封解析法思想的阐述，为实际工程的密封性能分析提供了一种简洁、快速的判别方法，并开发了一个可以用于外装外流形式密封性能分析的程序；随后采用有限差分数值方法，对特定条件下的Reynolds方程进行离散化处理，并以此作为密封端面间润滑薄膜特性研究的理论基础。把螺旋槽密封的模型建立、有限差分的运算、油膜特性等作为对象处理，通过这些对象将计算过程中的方法和中间数据进行了封装和继承，开发了一个可以用于分析计算螺旋槽密封性能的数值程序系统。同时，本文还将应用所开发的计算程序系统进行分析计算的结果与已有文献资料中实验或理论计算值进行了比较，结果表明分析计算结果与文献中给出的结果比较吻合，表明本文开发的计算程序系统中数学模型的正确性和计算方法的可靠性。最后本文还应用ANSYS软件对螺旋槽密封端面温度场进行了分析研究，提出端面温度场分析的热阻处理方法，有限元分析结果表明采用这一分析方法对于研究螺旋槽密封端面温度场分布具有指导意义。更多还原

【Abstract】 As a new non-contacting, no-leaking face seal, in the past few years, the spiral groove seal has been used widely in many fields, such as the aviation-aerospace and the petrochemical industry. To settle for the special work-conditions’ seal demand and with the academic development of gaseous spiral groove seal and application in industry, liquid spiral groove seal research desiderates urgently a great development. But such research is very limited and has not been investigated in domestic at the present time. The purpose of this project is to satisfy this requirement and establish the base for farther research.With summarized a great deal of datum in home and overseas, the paper will discuss performances of liquid spiral groove seal from several aspects, such as its principle, developmental actuality and seal capability.The paper introduces firstly a new brief and fast method that derived from spiral groove seal analytics. This method has been applied in the program system design of out-armed-out-flow spiral groove seal. Then with finite difference method, the paper solves the Reynolds Equation, which has been applied as math-model of spiral groove seal numerical research. A class structure of the computation of model-build, finite difference calculate, film- characteristic and friction and lubrication has been developed. All of these computations are treated as objects. Methods and data are encapsulated and inherited by these objects. The numerical program system for spiral groove seal has been developed. At the same time, the calculated values have been compared with the available data, the results show that the error is within the allowable range, therefore the correctness and reliability of the program system is verified. Finally, two-side temperature-field state of spiral groove seal is analyzed with ANSYS software. Furthermore, the paperintroduces the heat-resistance theory in spiral groove seal’s temperature-field analysis. The results of this finite element analysis show that this method which applied in analyzing spiral groove seal’s temperature-field is feasible.更多还原