VVD (VR 154-21) #9 w/motor AIR 225 M2 55 kW 3000 rpm, execution 5

Centrifugal Fan (Radial Fan) of High Pressure Series VVD (VR 154-21) #9 (VR 165-15.1)

The high-pressure centrifugal fan (radial fan) series VVD (VR 154-21) #9 (VR 165-15.1) with electric motor Electric motor AIR 225 M2 55.0 Power kW 3000 Vol./Min, made of carbon steel, is designed for moving air and other gas mixtures. It can operate in both suction and discharge modes within a temperature range of -16°C to +40°C, free from sticky or long-fibrous substances. The dust content in the medium must not exceed 150 mg/m³. High-pressure fans VVD (VR 154-21) #9 w/motor AIR 225 M2 55 kW 3000 rpm (VR 165-15.1) are suitable for use in regions with a moderate climate (U).

General Information on High-Pressure Centrifugal Fans VVD (VR 154-21) #9 w/motor AIR 225 M2 55 kW 3000 rpm (VR 165-15.1)

- High pressure;
- Single-sided suction;
- Spiral rotatable housing;
- Forward-curved blades;
- Number of blades: 12;
- Rotation direction: right and left;
- Material: carbon steel;
- Execution schemes:
- No. 1 (direct coupling) – impeller on the motor shaft;
- No. 5 (V-belt drive) – using V-belt transmission (V-belts, driving and driven pulleys).

Applications of High-Pressure Centrifugal Fans

High-pressure centrifugal fans are used for:
- Supplying compressed atmospheric air to nozzles for burning liquid fuel in grain dryers, cupolas, and furnaces;
- Ventilation of grain elevators and deep mines;
- Ejector-type pneumatic transport systems and other technological installations;
- Air conditioning and ventilation systems;
- Other sanitary-technical and industrial purposes.

Manufacturing Variants of Centrifugal Fans VVD (VR 154-21) #9 (VR 165-15.1) with Electric Motor Electric motor AIR 225 M2 55.0 Power kW 3000 Vol./Min

- Carbon steel;
- Stainless steel (custom order);
- Heterogeneous metals (custom order).

Design and Operating Principle of High-Pressure Centrifugal Fan Series VVD (VR 154-21) #9 (VR 165-15.1) with Electric Motor Electric motor AIR 225 M2 55.0 Power kW 3000 Vol./Min

Air movement is achieved by transferring the energy of the impeller’s rotation to the air. The general design consists of an impeller mounted on a drive shaft (either the motor shaft or an intermediate transmission shaft), installed in a housing. The housing is mounted on a welded frame bedplate, and the entire structure is welded. A collector with a flange is located at the fan’s outlet.

The fan VVD (VR 154-21) #9 (VR 165-15.1) with electric motor Electric motor AIR 225 M2 55.0 Power kW 3000 Vol./Min consists of the following main components:
- Impeller;
- Spiral housing;
- Electric motor Electric motor AIR 225 M2 55.0 Power kW 3000 Vol./Min;
- Inlet nozzle;
- Bearing assembly (running gear);
- Bedplate;
- Frame;
- V-belt transmission: V-belts, driving and driven pulleys (for execution No. 5);
- Slide rails with tensioning device (for execution No. 5);
- V-belt transmission guard (for execution No. 5).

Impeller of Fan VVD (VR 154-21) #9 (VR 165-15.1)

The impeller is of turbine type, featuring 12 blades. The blades are welded to the front and rear discs. The rear disc is attached to the hub by molding. The discs and blades are made of sheet steel, and the hub is made of gray cast iron. The impeller creates a vacuum in the suction zone and excess pressure in the discharge zone. It can rotate in either right or left direction.

Spiral Housing of High-Pressure Fan VVD (VR 154-21) #9 (VR 165-15.1)

The spiral housing is welded from sheet and rolled steel. It can be designed for right or left rotation. The surfaces of the impeller and spiral housing in contact with the moved medium form a flow cavity. The housing shapes the suction and discharge flows.

Asynchronous Electric Motor Electric motor AIR 225 M2 55.0 Power kW 3000 Vol./Min

The electric motor Electric motor AIR 225 M2 is a general-purpose three-phase asynchronous motor with a short-circuited rotor, designed for operation from an AC network with a frequency of 50 Hz and voltage of 380/660 V. The motor Electric motor AIR 225 M2 has a nominal rotation speed of 3000 RPM. Dimensions: axis height 225 mm; shaft diameter 55 mm; power in kW: 55.0; climatic version: UZ; IP rating: 54. Upon request, the motor Electric motor AIR 225 M2 55.0 Power kW can be manufactured with a silumin alloy housing.

Position of Radial Fan Housing for Right (PR) and Left (LEV) Rotation, Viewed from the Suction Opening

- Right rotation;
- Left rotation.