文章来源： 作者：罗茨机电 发布时间：2021-12-07 浏览次数：523
Nature: the natural vibration frequency of the foundation device shall not be greater than 1 / 3 of the rotating speed of the motor and fan, and the difference between the vibration speed of the fan when running and the vibration speed of the fan when stationary shall be more than 3 times.
Flexible joint: flexible joint shall be set between the inlet and outlet of fan and 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 casing shall not bear the weight of other parts.
Building structural parts: vibration isolation measures shall be taken when the ventilator is installed on building components.
Direct air duct: the duct fan can be installed on the direct air duct, which has the advantages of convenient connection and small occupied space
Centrifugal pipe has good air function, large 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.
Centrifugal fan is a kind of driven fluid machinery, which depends on the input mechanical energy to increase the gas pressure and discharge the gas. According to the principle of converting kinetic energy 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 to the radial direction when flowing 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, followed by the diffusion process. In the multistage centrifugal fan, the reflux device is used to make the air flow enter the next impeller to produce higher pressure.
Centrifugal duct fan - composition of centrifugal duct fan
Casing: 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 blade, curved front disc and flat rear disc.
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 belt pulley (or coupling).
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