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本文讨论了螺旋密封的性能特点，并通过一个简单模型介绍了其作用原理，由此推导出处于层流状态的螺旋密封的压差计算式。为便于设计应用，文中对最佳螺旋参数做了较为深入的探讨，可以为一套基本的简单装置确定其最佳密封几何形状和尺寸，有一定的应用价值。
In this paper, the performance characteristics of the screw seal are discussed. The principle of the screw seal is introduced through a simple model. The pressure differential equation of the screw seal in the laminar flow state is deduced. In order to facilitate the design and application, the best spiral parameters are discussed deeply in this paper, which can be used to determine the best sealing geometry and size for a basic simple device.