| 摘要 |
An aerator (10) is disclosed which includes a hollow outer tube (12) and a hollow inner tube (14) rotatably supported therein. The inner tube is drivingly connected to a drive shaft (28) of the motor (18). A mounting flange (34) extends from a first end (36) of the outer tube and a mounting bracket (30) is interposed between the mounting flange and the motor. The mounting bracket and mounting flange are removably attached to the motor. A bearing mechanism which includes a bearing (44) and a ceramic wear sleeve (46) rotatably support a second end (40) of the inner tube adjacent the second end (42) of the outer tube. A propeller (20) is attached to the second end of the inner tube and has a pitch which is sufficiently high to move liquid past it at a velocity wherein cavitation of the liquid above the propeller is prevented at a preselected operating rotational speed. |
