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O形圈和矩形圈是最通用型的密封。有各种腔体结构来安装橡胶密封。矩形圈的腔体结构一般是一个分离面的密封部件。在两个分离面的场合下要采用径向和端面密封。用一个橡胶零件来保证密封是最适宜和最经济的。现在考察用一个矩形圈密封两个分离面的情况,即靠拉伸来密封轴,靠压缩来密封法兰。这种密封的特点是沿法兰压缩时胶圈的直径增大。当沟槽壁限制外径位移时,胶圈受压缩会减小内径,增加与轴的接触应
O-rings and rectangular rings are the most versatile seals. There are a variety of cavity structures to install rubber seals. The rectangular ring cavity structure is generally a separate surface seal. In the case of two separate surfaces to be used radial and face seal. It is most suitable and economical to use a rubber part to ensure the sealing. Now consider the case of sealing two separate faces with a rectangular ring, that is, the shaft is sealed by stretching and the flange is sealed by compression. This seal is characterized by an increase in the diameter of the rubber ring as it is compressed along the flange. When the groove wall to limit the displacement of the outer diameter, rubber ring will be reduced by reducing the inner diameter, increase contact with the shaft should be