| 摘要 |
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 D1 of the front shroud (12) is less than the outer diameter D2 of the rear shroud (14). |
