Propeller and stirrer for circulating wastewater in a clarifier
A propeller fastened to a shaft in a clamping manner, the shaft having a driver profile extending in the axial direction, wherein: the propeller is formed from multiple elements, each element (having a hub portion with a counter profile corresponding to the driver profile; a first connection portion and a propeller blade extending from the first connection portion are formed on one side of the hub portion, and a second connection portion is formed on the opposite other side of the hub portion; the first connection portion is designed to bear interlockingly against a further second connection portion of an adjacent further element; and, when the elements are connected such that their connection portions bear against one another, the hub portions of all the elements complement one another to form a hub surrounding the shaft in an interlocking manner.
1. A propeller to be secured by clamping to a shaft having a driver profile extending in an axial direction, the propeller comprising:
a plurality of identical elements;
wherein each identical element of the plurality of identical elements has a hub portion with a mating profile corresponding to the driver profile;
wherein a first connection portion and a propeller blade extending from the first connection portion are molded on one side of the hub portion and a second connection portion is molded on an opposite other side of the hub portion;
wherein the first connection portion is designed to bear interlockingly against a second connection portion of an adjacent identical element of the plurality of identical elements;
wherein, when the plurality of identical elements bearing against one another by their connection portions are connected, the hub portions of all of the plurality of identical elements together form a hub that surrounds the shaft interlockingly; and
wherein the first connection portion has at least two first apertures.
2. The propeller according to claim 1 , wherein the shaft is a splined shaft.
3. The propeller according to claim 1 , wherein the propeller is formed from at least three identical elements.
4. The propeller according to claim 3 , wherein the propeller is formed from four identical elements.
5. The propeller according to claim 1 , wherein the first apertures are formed as threaded bores.
6. The propeller according to claim 1 , wherein the second connection portion has at least two second apertures, corresponding to the first apertures, for passage of screws.
7. An agitation apparatus for circulating wastewater in a clarifier, the agitation apparatus comprising a motor and a shaft extending therefrom with a driver profile extending in the axial direction, wherein a propeller according to claim 1 is mounted on the shaft.
8. The agitation apparatus according to claim 7 , wherein the shaft is a splined shaft.
9. The agitation apparatus according to claim 7 , wherein a hyperboloid agitator body is mounted on an end of the shaft extending hanging from the motor.
10. The propeller according to claim 1 , wherein each of the plurality of identical elements is molded in one piece.