| 摘要 |
The centrifugal pump of the present invention has an impeller of an improved construction. More specifically, the impeller of the present invention has a blade wherein the front surface comprises a sunken recess (124) formed extending in the length direction, and, with respect to the sunken recess (124), the height (Ha) of the blade on the side in the direction of rotation is formed so as to be low while the height (Hb) of the blade on the opposite side to the direction of rotation is formed so as to be high, and wherein the face of the blade (122) on the side in the direction of rotation is formed with a concave part (132) and a convex part (133), such that the blade has a function whereby solid matter which has flowed in can easily be ground up or cut. The centrifugal impeller of the present invention, which is constituted in this way, has the concavo-convex parts (132)(133) formed in the front face of the blade and has a characteristic effect whereby it can effectively grind solid matter, and thus it is particularly useful as a pump for conveying fluids (solids-laden fluids) containing dirty water, sludge, slurry and the like. |
