| 摘要 |
Impeller for a rotodynamic pump, in particular multi-stage pump, with rear relief ribs, consisting of a hub and of drawn sheet parts: rear disk, blades, and front disk mounted on that hub, characterized in that it has uniform blades (3), which consist of the longer hydraulic blade (8) and the shorter relief blade (9) which are placed one further to the other and constituting one whole, and a rear disk (2) with radial lengthwise cut-outs (10) having appropriate shape for blades (3) mounted therein; the shorter blades (9) protrude through those cut-outs (10) to the outside of the impeller thus acting as the relief ribs.<IMAGE>
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