Centrifugal pump

F - Mech Eng,Light,Heat,Weapons – 04 – D

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Details

F04D 29/22 (2006.01)

Patent

CA 2611141

The impeller wheel disc (11; 21; 31), provided with at least one broad blade (15; 25L, 35L), of the impeller wheel (10; 20; 30), which can be driven by means of a shaft (60), of a centrifugal pump, in particular a non-clogging impeller, for feeding fluids with solid and gaseous additives is displaced in the direction of the drive by a distance D so that the impeller wheel chamber (5A; 105A) is increased in size by a part (5B; 105B) which is located further behind. Furthermore, the impeller wheel (20; 30) comprises, according to one preferred embodiment, at least one auxiliary blade (25S; 35S) whose central width is preferably approximately 50% of the width of the broad blade. This arrangement improves in particular the gas feeding capability of the pump.

Le plateau (11 ; 21 ; 31), pourvu d'au moins une pale large (15 ; 25L ; 35L), d'une roue de roulement (10 ; 20 ; 30), pouvant être entraînée par un arbre (60), d'une pompe centrifuge, en particulier d'une pompe non engorgeable servant à refouler des liquides qui contiennent des impuretés solides et gazeuses est décalé d'une distance D dans la direction de l'entraînement, de manière que les dimensions de la chambre (5A ; 105A) de la roue de roulement soient agrandies par l'addition d'une partie (5B ; 105B) située plus à l'arrière. Dans un mode de réalisation préféré, cette roue de roulement (20 ; 30) comprend au moins une pale auxiliaire (25S; 35S) dont la largeur moyenne correspond de préférence à approximativement 50 % de la largeur de ladite pale large. Cette configuration permet en particulier d'améliorer la capacité de refoulement des gaz de la pompe.

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