| 摘要 |
<p>Invention discloses a pump consisting from multiple stages, with diffusor (4) adjusted for self-aspirating. This adjusting is characterized that diffusor (4) is single-vaned or multi-vaned, whereby at side wall (perpendicular to rotating axis) of single or multiple channels is closely behind leading edge created recirculating hole (7), separated from operating part of channel by separator (8). The hole is connecting the space above rotor wheel (3) with delivery space (12) of the box (1). Very good effect of pump is available adjusting only for single stage for self-aspirating. Intensive recirculation is available by separation of recirculating hole from operating part of channel, as result of it is effective self-aspirating process.</p> |
