| 摘要 |
<p>The invention is a mechanical seal (1; 1'; 1") for a fluid, comprising a supporting body (2) that delimits a through cavity (3) extending between two opposing openings (4, 5) that delimit the through cavity (3) according to a longitudinal direction (X), in which the following components are arranged: a first sealing ring (6) associated with a first opening (4); a second sealing ring (7) facing the first sealing ring (6) and revolvingly associated with the supporting body (2); elastic means (10) compressed between the supporting body (2) and a sealing ring (6, 7) so as to thrust the sealing rings (6, 7) against each other. The seal comprises a stop ring (11; 11') interposed between the second sealing ring (7) and a supporting surface (12) that delimits the perimeter of the second opening (5), the stop ring (11, 11') being configured in such a way that it can be thrust by the elastic means (10) in a stop position against the supporting surface (12). The stop ring (11; 11') is furthermore configured so that, in the stop position, it has a portion (11 a) facing the inside of the second opening (5).</p> |
