F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 29/18 (2006.01) F04D 1/04 (2006.01) F04D 29/22 (2006.01) F04D 29/28 (2006.01)
Patent
CA 2301761
A pump impeller (10) which is modified so as to achieve selected operating performance parameters. The impeller (10) includes a front shroud (12) and a rear shroud (14), the shrouds (12, 14) being spaced apart so as to form a plurality of passageways therebetween which are separated by a plurality of impeller blades (15), each having an outer edge (19) extending between the front and rear shrouds (12, 14), the impeller (10) having an outer diameter D (15). The method of modification includes the steps of trimming the outer edge (19) of the blades (15) so that the outer diameter DI of the front shroud (12) is less than the outer diameter D2 of the rear shroud (14).
Ce rotor à aubes (10) est modifié de manière à fonctionner selon des paramètres d'exécution choisis et il comprend une gaine avant (12) et une gaine arrière (14), ces gaines (12, 14) étant espacées l'une de l'autre de manière à former plusieurs passages entre elles, lesquels sont séparés par plusieurs lames (15) de rotor; chaque lame présente un bord extérieur (19) s'étendant entre les gaines avant et arrière (12, 14), le rotor (10) possédant un diamètre externe (D). Ce procédé de modification comprend les étapes consistant à rogner le bord extérieur (19) de lames (15) de façon que le diamètre externe (D1) de la gaine avant (12) soit inférieur au diamètre externe (D2) de la gaine arrière (14).
Moffat & Co.
Warman International Limited
Weir Warman Ltd
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