Surface aerator impeller design including stabilizer cylinder

Abstract

A surface aeration impeller incorporating a stabilizer cylinder that damps out and eliminates any sustained oscillatory or vibratory displacements normal to the axis of rotation when the impeller is in operation. The surface aeration design operates in a mechanically stable fashion under diverse loading conditions and at any static liquid level submergence of the impeller.

1 . A surface aeration impeller designed to rotate about an axis perpendicular to a liquid surface, said impeller comprising:
 (a) a plurality of blades attached to a mounting member wherein said blades each have an inside vertical edge forming an interior diameter and an outside vertical edge forming an exterior diameter;   (b) said mounting member having a top surface and a bottom surface; and   (c) a stabilizer cylinder positioned below the bottom surface of said mounting member.   
   
   
       2 . A surface aeration impeller designed to rotate about an axis perpendicular to a liquid surface, said impeller comprising:
 (a) a plurality of blades attached to a mounting member wherein said blades each have an inside vertical edge forming an interior diameter and an outside vertical edge forming an exterior diameter;   (b) said mounting member having a top surface and a bottom surface; and   (c) a stabilizer cylinder positioned below the bottom surface of said mounting member, said stabilizer cylinder being physically attached to the bottom surface of said mounting member.   
   
   
       3 . The surface aeration impeller according to  claim 1  or  2 , further comprising:
 a plurality of essentially vertical blades attached to the underside of a horizontal mounting member wherein said blades each have an inside vertical edge forming an interior diameter and an outside vertical edge forming an exterior diameter.   
   
   
       4 . The surface aeration impeller according to  claim 1  or  2 , wherein said blades additionally contain an endcap. 
   
   
       5 . The surface aeration impeller according to  claim 1  or  2 , wherein the diameter of said stabilizer cylinder is less than or equal to the interior diameter of said blades. 
   
   
       6 . The surface aeration impeller according to  claim 1  or  2 , wherein the diameter of said stabilizer cylinder is greater than or equal to the exterior diameter of said blades. 
   
   
       7 . The surface aeration impeller according to  claim 1  or  2 , wherein the height of said stabilizer cylinder is less than the height of said blades. 
   
   
       8 . The surface aeration impeller according to  claim 1  or  2 , wherein the height of said stabilizer cylinder is greater than the height of said blades. 
   
   
       9 . The surface aeration impeller according to  claim 1  or  2 , wherein the height of said stabilizer cylinder is equal to the height of said blades. 
   
   
       10 . The surface aeration impeller according to  claim 1  or  2 , wherein said stabilizer cylinder is attached to the mounting member with threaded rods and fasteners. 
   
   
       11 . The surface aeration impeller according to  claim 1  or  2 , wherein said stabilizer cylinder is smaller than the interior diameter of said blades, and the outer surface of said stabilizer cylinder is directly attached to the inside vertical edge of each blade. 
   
   
       12 . The surface aeration impeller according to  claim 1  or  2 , wherein the diameter of said stabilizer cylinder intersects the horizontal surface of said blades. 
   
   
       13 . The surface aeration impeller according to  claim 1  or  2 , wherein said stabilizer cylinder is directly attached to the axis perpendicular to said liquid surface.