ROTARY CAVITATION AERATOR Russian patent published in 1994 - IPC

FIELD: devices for dissolving oxygen in waste water during biological cleaning. SUBSTANCE: mounted in rotary cavitation aerator on the tube-shaft near lower end of electric motor is axial fan; circular guide vane assembly for directing the air flow from the fan is fitted in the lower end plate of the electric motor opposite the fan blades. Electric motor, upper end of the tube-shaft and guide vane assembly are embraced in a spaced relation with solid cap-shaped casing for passage of air flow; this casing is tightly connected with lower end plate of electric motor. Mounted on the tube-shaft at the upper end of electric motor is additional axial fan whose blades are located between casing and upper cylindrical part of the electric motor. Besides that, guide vane assembly (for sir flow) is secured in the casing above the additional axial fan for reduction of the resistance to air flow. This guide vane assembly is made in form of blades and semitorus body whose inner hole is located above end hole of the tube-shaft. EFFECT: enhanced efficiency. 2 cl, 1 dwg