| 摘要 |
<p>An apparatus for circulating and/or aerating a liquid, especially waste water located in a tank or basin by means of a centrifugal impeller or rotor immersed in the liquid and rotatable about a substantially vertical axis. The centrifugal impeller is equipped with a multiplicity of at least approximately radially extending liquid conveying channels. The liquid conveying channels at least at the region of their outlet openings or mouths are curved in such a manner in a vertical plane and/or provided at the outlet openings in such a manner with flow deflection surfaces that the liquid emanating from the conveying channels flows at an angle of at least 5 DEG relative to a substantially horizontal plane towards the side of the impeller provided with an inlet opening.</p> |
