| 摘要 |
The present invention concerns a seal device (1) interposed between an impeller (5) and a pump body (4). That device is composed of a seal ring (15), encircling the forward portion (9) of the impeller (5), which is accommodated in a seat (14) fonned on the pump body (4). The seat (14) has such dimensions as to allow radial movement of the ring (15) on its interior. Furthermore, there is provided a means (11) of allowing a pressure force to act on the sealing element (15) at least at a portion thereof facing the forward portion (9) of the impeller (5). |
