内接触金属弹性密封环(也称内接触金属密封环)具有耐热、耐磨、摩擦损耗小、寿命长等特点,在很多场合下被用作往复运动件的密封元件。例如,在高速、高温下工作的活塞杆的密封,在含固体杂质的流体介质中工作的柱塞泵柱塞的密封等,均可考虑采用内接触金属密封环进行密封。内接触金属密封环在自由状态时,环的开口处两端重叠在一起(图1a),工作时密封环的内侧面与被密封面相接触(图1b)。 Internal contact metal elastic seal ring (also known as the inner contact metal seal ring) has the characteristics of heat resistance, wear resistance, low friction loss and long service life, and is used as a sealing element for reciprocating parts on many occasions. For example, sealing of a piston rod operating at high speed and temperature, sealing of a plunger pump plunger working in a fluid medium containing solid impurities, etc., may be considered with an inner contact metal seal ring. When the inner contact metal seal ring is free, both ends of the opening of the ring are overlapped (Figure 1a). During operation, the inner side of the seal ring is in contact with the sealing surface (Figure 1b).