Centrifugal fan for tunnels

Centrifugal fan for tunnelsWhen the speed is constant, the theoretical pressure flow curve of a centrifugal fan should be a straight line Due to internal losses, the actual characteristic curve is curved. The pressure generated in a centrifugal fan is greatly affected by changes in intake temperature or density. For a given intake volume, the highest intake temperature (air density)low）The pressure generated during the eventlowFor a given pressure and flow characteristic curve, there is a power and flow characteristic curve When the blower operates at a constant speed, the required power increases with a decrease in intake temperature for a given flow rate.

construction

A centrifugal fan consists of a casing, a main shaft, an impeller, a bearing transmission mechanism, and a motor.

Chassis: Made of steel plate, it is sturdy and reliable, and can be divided into integral and semi open types. The semi open type is easy to maintain.

Impeller: composed of blades, curved front plate, and flat rear plate.

Rotor: It should undergo static and dynamic balancing to ensure smooth rotation and good performance.

Transmission part: It consists of a main shaft, bearing housing, rolling bearings, and pulleys (or couplings).

Centrifugal fan for tunnelsA centrifugal fan consists of a rotating impeller and a fixed diffuser. The impeller is driven by a motor to rotate at high speed, and the air inside the impeller is driven to form an airflow, which is then diffused by the diffuser to form a high-speed airflow. The working principle of a centrifugal fan is similar to the power transmission of a vehicle through the action of a wheel. The impeller acts like a wheel, generating centrifugal force through high-speed rotation, sucking air in from the suction port, and then discharging it.

feature

1. Handle a large amount of air. Centrifugal fans can process large amounts of air, making them widely used in industries, construction, and environmental protection.

2. Stable operation. The shaft accuracy of centrifugal fans is high, so their speed is stable, ensuring their efficient and stable operation.

3. Low energy consumption. Compared with other types of ventilation equipment, centrifugal fans have lower energy consumption and higher energy utilization efficiency.

4. Easy to maintain. Centrifugal fans have small volume, simple structure, and are easy to install and maintain, which is also one of the reasons why they are widely used in the fields of industry, construction, and environmental protection.