F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 15/00 (2006.01) F04D 29/06 (2006.01) F04D 29/66 (2006.01)
Patent
CA 2268293
The present invention relates to a centrifugal pump. Especially, the invention concerns a centrifugal pump capable of pumping liquid as free of pressure fluctuations as possible. Centrifugal pumps of this type are used, for instance, as feed pumps for paper machine head boxes. A characteristic feature of the pump of the invention is that the vanes (22, 24) of the impeller and the volute cut-water (18) at the junction of the spiral casing and the pressure opening serving as the element generating pulses with the vanes are positioned at a distance s from each other so that the distance mentioned is at least 7 % of the diameter of the impeller (14).
L'invention concerne une pompe centrifuge, notamment une pompe centrifuge capable de pomper du liquide avec le minimum de variations de pression. Les pompes centrifuges de ce type sont utilisées, par exemple, comme pompes d'alimentation pour les caisses de tête des machines à papier. Une caractéristique de la pompe de l'invention est que les ailettes (22, 24) de la roue et le bec de volute (18), à la jonction du corps en spirale et de l'orifice de pression servant d'élément générateur d'impulsions avec les ailettes, sont séparés d'une distance (s) égale à au moins 7 % du diamètre de la roue (14).
Kupiainen Seppo
Saari Petri
Ahlstrom Pumput Oy
Gowling Lafleur Henderson Llp
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