Aerospace series - pipe coupling 8 30 ' in titanium alloy - ferrules with dynamic beam seal end , welded and reduced at pipe end 航空航天系列.钛合金管连接件8 30 ' .在管端焊接和变径的带动力横梁密封端头的环箍
To obtain satisfying performance , the sea1 end faces of rotating ring and static ring of the mechanica1 seal must keep para11e1 or approximately paral1e1 each other 欲使密封具有良好的性能，则必须做到受载后的动、静环密封端面间保持平行或近似平行的几何形状。
The basic principal and general structure of dry gas seal are introduced briefly , and aiming at the characteristics of logarithm spiral curve , the calculation of the pressure to the spiral groove end surface by the theory of narrow groove are given . the method of narrow groove theory and finite element method are utilized to optimize the end surface structure of the spiral groove dry gas seal . the structure of the seal is confirmed on the base of the result 简要介绍了干气密封的基本原理和一般结构，同时针对对数螺旋线形的特点，介绍了窄槽理论对螺旋槽端面的压力分布计算，利用窄槽理论和有限元方法对螺旋槽干气密封端面结构进行了优化，并得出了优化结果，根据这一结果，确定了具体的密封结构。
Finally , two - side temperature - field state of spiral groove seal is analyzed with ansys software . furthermore , the paper introduces 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 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。
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 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。
