文章来源： 作者：罗茨机电 发布时间：2022-08-23 浏览次数：262
Centrifugal duct fan I think you are very familiar with this word. Although many people do not know what centrifugal duct fan is and what its function is, it does exist in every corner of our life and is indispensable. Let's learn about centrifugal duct fan.
Centrifugal fan is a driven fluid machine that relies on input mechanical energy to increase gas pressure and discharge gas. According to the principle that kinetic energy is converted into potential energy, it uses the high-speed rotating impeller to accelerate the gas, then decelerate and change the flow direction to convert kinetic energy into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, changes into the radial direction when the gas flows through the impeller, and then enters the diffuser. In the diffuser, the gas changes the flow direction to cause deceleration, which converts kinetic energy into pressure energy. The pressure increase mainly occurs in the impeller, and then occurs in the diffuser process. In the multi-stage centrifugal fan, the reflux device is used to make the air flow enter the next impeller to generate higher pressure.
Centrifugal duct fan - composition of centrifugal duct fan
Shell: made of steel plate, solid and reliable, can be divided into integral type and semi open type, which is convenient for maintenance.
Impeller: composed of blades, curved front disk and flat rear disk.
Rotor: static balance and dynamic balance shall be conducted to ensure stable rotation and good performance.
Transmission part: it is composed of main shaft, bearing box, rolling bearing and pulley (or coupling).
Nature: the natural vibration frequency of the foundation device shall not be greater than 1 / 3 of the rotating speed of the motor and the fan. The difference between the vibration speed of the fan during operation and the vibration speed of the fan at rest shall be more than 3 times.
Flexible joint: flexible joint shall be set between the inlet and outlet of the fan and the air duct. Air inlet pipe, air outlet pipe and other devices shall be independently supported and firmly supported by the foundation or other components of the building. The cabinet shall not bear the weight of other parts.
Building structure: when the ventilator is installed on the building components, vibration isolation measures shall be taken.
Straight air duct: the duct fan can be installed on the straight air duct, which has the advantages of convenient connection and small occupation space
The centrifugal duct fan has good performance, small capacity, high pressure, low noise, tight structure, high efficiency and good plasticity. It has been widely used in the ventilation of hotels, theatres, KTV, shopping malls, colleges and universities and civil buildings, and has become an indispensable part of people's life.