Operational advantages and overall structure of boiler centrifugal draft fan

- May 08, 2018-

The boiler centrifugal draft fan is mainly composed of the air inlet, the casing, the impeller, the regulating door and the transmission part during the production process. In the process of manufacturing the centrifugal fan, the impeller of the boiler centrifugal fan is mainly composed of 12 back tilting wings. The blades are welded between the curved wheel cover and the plate-shaped wheel disk. Due to the adoption of the wing-shaped blades, the fan has high efficiency, low noise and high strength.

The impeller of the boiler centrifugal draft fan is effectively operated through a static and dynamic balance correction to a certain extent, and the impeller is operated smoothly. In the operation, the impeller of the same machine number is the same in the structure of the pass and the draft fan. The casing of the equipment is a volute body welded with ordinary steel plates. The fan casing is made in one piece. For the induced draft fan, a ash-removing door is opened on the worm-shaped plate and thickened appropriately to prevent the wear of the soot and prolong its service life.

The inlet of the centrifugal fan of the boiler is a concise and streamlined overall structure. In the process of manufacturing, the bolt is fixed on the inlet side of the casing. A device for adjusting the size of the fan flow. The ventilator and induced draft fan of the boiler centrifugal fan were all made into a single suction, and each had No. 8~16 total 7 machine numbers.

Each fan of the boiler centrifugal draft fan can form two types of right rotation or left rotation during the manufacturing process. A fan is faced from one end of the motor, and the clockwise rotation of the impeller is referred to as a right-rotation fan, which is expressed as "right". Turning counterclockwise is called a left-hand fan, which is indicated by "left".

1. Impeller: It is welded by using inclined blades of backward inclined wing.

2. Chassis: carbon steel welding production.

3. Air inlet: convergent streamlined overall structure.

4. Transmission: D-type transmission.

5. Transmission group: composed of the main shaft, rolling bearings, bearing boxes and other components.

6. Adjustment door: axially installed in front of the air inlet.

Boiler centrifugal fan in the factory, to a certain extent, is not with its frequency control, in the process of operation is the need to configure the user, but from a professional point of view, the use of frequency control , It will bring certain benefits, for example, can let the centrifugal fan run at the power frequency, at the same time, it can also extend the life of the motor. In addition, if the fan load is not very stable, or if the fan has a large range of changes, use it to achieve energy savings.