RU1778086C - Device for forced delivery of air to aerator rotor - Google Patents

Abstract

Usage: for biological wastewater treatment. SUMMARY OF THE INVENTION: A device for forcing air to the aerator rotor comprises a hollow shaft with air inlet openings in the upper part. The lower end of the shaft is connected to the rotor of the aerator, and the upper end is connected to the shaft of the electric motor. The electric motor is located on the support flange inside the ventilation casing. The hollow shaft guide tube is fixed with its upper end in the hole of the support flange. On the hollow shaft, on both sides of the air inlets of the upper and lower impellers of the axial fan, the guide tube is provided with an air duct connected to it below the lower impeller in the support pipe and to the ventilation casing of the electric motor. The hollow shaft above its air intake holes is muffled. 1 ill. (L C

Description

The invention relates to units of devices for dissolving gases in a liquid, mainly oxygen in wastewater during biological treatment.

A device is known for supplying air to the aerator rotor, comprising a hollow shaft with air inlet openings in the upper part, the lower end of which is connected. yen with an aerator rotor, and the upper one with a shaft of an electric motor placed on the support flange, a guide pipe of the hollow shaft, fixed with the upper end in the hole of the support flange

A disadvantage of the known device is the inability to supply air to the rotor of the aerator under a pressure exceeding atmospheric

Of the known closest to the described invention in technical essence is a device for forced air supply to the rotor of the aerator,

containing a hollow shaft with air intake holes in the upper part, the lower end of which is connected to the aerator rotor, and the upper end - to the shaft of an electric motor located on the support flange, a guide pipe of the hollow shaft, fixed by the upper end in the hole of the support flange, the motor ventilation hood, mounted on the supporting flange and having a hole in the upper part For the forced air supply to the aerator rotor, a centrifugal electric motor fan is used

A disadvantage of the known device is the low efficiency of air supply to the aerator rotor and the low efficiency of ventilation of the electric motor.

The purpose of the invention is to increase the efficiency of air supply to the rotor of the aerator and ventilation of the electric motor

X | XI 00 O 00 O

This goal is achieved in that in a device for forced air supply to the aerator rotor, comprising a hollow shaft with air intake holes in the upper part, located in the guide tube, the aerator rotor, an electric motor placed on the support flange in the ventilation casing with an opening in the upper part and the fan, the latter made in the form of upper and lower impellers mounted on the hollow shaft on both sides of the air intake holes, the guide tube below the lower impeller communicates with the ventilation ozhuhom through the duct, and the hollow shaft above sampling holes plugged.

The drawing shows a diagram of a device for forcing air to the aerator rotor.

The device comprises an aerator rotor 1, a hollow shaft 2 with air inlet holes 3 in the upper part, the lower end of which is connected to the aerator rotor 1, and the upper end - with a shaft 4 of an electric motor 5 located on a supporting flange 6, a guide pipe 7 of the hollow shaft 2 fixed by the upper end in the hole 8 of the support flange b, a ventilation casing 9 of the electric motor 5 mounted on the support flange 6 and having an opening 10 in the upper part. The upper 11 and lower 12 impellers of the axial fan are installed on the hollow shaft 2 on both sides of the air inlet openings 3, and the guide tube below the lower impeller 12 is equipped with an air inlet 13, which communicates via the duct 14 with the lower part of the ventilation casing 15, Hollow shaft 2 above the intake holes 3 has a plug 16 to prevent air leakage from the hollow shaft 2 into the ventilation casing 15. The impellers 11 and 12 may have a guide apparatus fixed to the guide tube 7 (not shown in the drawing kettle).

The device operates as follows.

During operation of the electric motor 5, the shaft 4 rotates and the hollow shaft 2 fixed to it with the impellers 11 and 12 of the axial fan. To the impeller 11 air (shown in the drawing by arrows) comes from above

atmosphere through the opening 10 of the casing 9, the ventilation casing 15. the upper end of the guide pipe 7 and the space between the last and hollow shaft 2. To the impeller

12, air enters from below the atmosphere through the opening 10 of the casing 9, the ventilation casing 15, the air duct 14, the opening 13 in the guide tube 7 and the space between the last and the hollow shaft 2. The impellers 11 and 12 pump air towards each other, which through the opening 3 and the cavity of the shaft 2 enters the rotor 1 of the aerator. When moving in the ventilation hood 15, the air cools the electric motor 5, and is two times more efficient than the prototype, since between the casing 9 and the electric motor 5 passes a twice as much air volume per unit of time (provided that each impeller 11 and 12 is equal in performance to the impeller of the prototype fan).

For the same reason, two times more efficient in comparison with the prototype is provided and the air supply to the rotor 1

aerator, since the rotor 1 of the aerator of the device receives twice the amount of air per unit time than the prototype.

Using the described technical solution increases the efficiency of air supply to the aerator rotor and the ventilation efficiency of the electric motor.

Claims (1)

The claims Force feed device air to the aerator rotor, comprising a hollow shaft with air intake holes in the upper part, located in the guide tube, the aerator rotor, an electric motor located on the support flange in the ventilation casing with a hole in the upper part, a fan, characterized in that, with In order to increase the efficiency of air supply to the aerator rotor and ventilation of the electric motor, the fan is made in the form of a guide tube below the lower one mounted on the hollow shaft on both sides of the air intake holes of the upper and lower impellers impellers communicates with the ventilation hood through an air duct, and the hollow shaft is muffled above the intake openings.