| 摘要 |
<p>PURPOSE:To prevent invasion of bubbles which generates during aeration, into an air suction port by covering both of an air suction port of a hollow shaft attached with stirring blades and a motor with a cover, providing further a sealing material between a fan or the cover and the hollow shaft. CONSTITUTION:Stirring blades 4 are attached to a hollow shaft 2 to be rotated with the motor 1, and an air suction port 3 is provide to above the hollow shaft 2. A cover 5 for covering both of the motor 1 and the air suction port 3 is provided, and the fan 6 is installed to the inside of the cover. Or, the sealing material is arranged to below the air suction port 3 between the hollow shaft 2 and the cover 5. When the stirring blades 4 are dipped in water such as sewage, and the water is aerated by feeding air from the air suction port by turning the stirring blades with the motor 1, bubbles are generated, but the bubbles do not reach the air suction port 3 since the pressure inside off the cover 5 is held at a positive pressure by the fan 6 or checked by the sealing material. Thus, interruption of aeration due to choking of the air suction port by the bubbles is prevented.</p> |
