| 摘要 |
<p>A fishbone-like helical concentric toothed metallic gasket, upper and lower end faces of which are provided thereon with annular toothed grooves in the peripheral direction, wherein teeth of the toothed grooves are integrated with the metallic gasket and obliquely disposed towards a pressure source, the teeth having a cross-sectional shape looking like a fishbone and an oblique angle of greater than 0° and less than 90°, and a contact surface between top of the teeth and a flange forms a non-sharp corner is disclosed. Due to the oblique orientation of the toothed grooves on the surfaces of the rings, a plurality of enclosed pressure-resistant chambers are formed, so that pressure from the pressure source can be relieved step by step; and the closed chambers may generate an effective sealing compensation force by using fluid pressure, thereby improving the reliability of sealing.</p> |
