| 摘要 |
A centrifugal pump (10) with facilitated self-priming, which comprises a casing (11) with a suction inlet (12) and a discharge outlet and with an internal series (14) of diffusers and impellers, which form a cylindrical assembly that forms, together with the casing (11), an annular interspace which is connected to the inside of the series (14) of diffusers and impellers on the discharge side through corresponding openings (13a) and on the inlet side through a hole (18) arranged perimetrically in the intake region; the hole (18) is controlled, on the side of the interspace (16), by a normally-open flexible metallic laminar valve (19). A wall (19). A wall (20) of the pump struck by the fluid exiting from the interspace (16) through the controlled hole (18) is shaped so as to have a double symmetrical channel (21) for imparting to the fluid a double vortex before passing through the first impeller. |
