| 摘要 |
PURPOSE: An impeller, an assembly of the same and a self-priming pump having the same are provided to prevent the self-priming pump from being clogged even if solidified impurities or wastes exist in fluid. CONSTITUTION: A self-priming pump(100) includes an impeller(1) having plural stages, an upper casing(20), annular members(10,10a), a lower casing(30) and an impeller driving device(70). The impeller(1) has a first two-step impeller(2) and a second two-step impeller(3). Each of first and second two-step impellers(2,3) has a first rim(4) having a large diameter, a second rim(4a) having a small diameter, a cylindrical core section having a shaft hole(7), a first baffle(5) extending to an inner peripheral portion of the first rim(4), and a second baffle(5a) extending to an inner peripheral portion of the second rim(4a).
|
