聚四氟乙烯与橡胶相比,强度高,耐磨性好,摩擦力小,静、动摩擦系数接近,耐高、低温性能好,抗腐蚀和抗氧化能力强,但是弹性很差。为了充分利用它的优良性能,同时又弥补其弹性不足,用弹性元件与之结合构成组合式密封件。一、组合式密封件动密封机理分析 PTFE compared with rubber, high strength, good wear resistance, small friction, static and dynamic friction coefficient close to high and low temperature performance, corrosion resistance and oxidation resistance, but the flexibility is poor. In order to make full use of its excellent performance, but also make up for its lack of flexibility, combined with flexible components to form a combined seal. First, the combined seal dynamic sealing mechanism analysis