旋转轴密封件规定其具有一个可变形的截面,一般都具有一个金属骨架,由于密封唇缘向内(或向外)的径向负荷加在密封轴或配合壳体表面上,因此它能防止沿旋转轴而产生的泄漏(流体密封制造者协会,1967年).上述这个定义的概念包括各种类形的结构,材料和性能特征,其中有些将在下面加以叙述. Rotary shaft seals are specified to have a deformable cross-section and generally have a metal frame which prevents the radial load applied inwardly (or outwardly) by the sealing lip against the surface of the sealing shaft or mating housing Leakage along the axis of rotation (Fluid Seal Manufacturers Association, 1967.) The above-defined concept includes various types of structural, material, and performance characteristics, some of which are described below.