The noise of the housing and motor can be solved by installing a soundproof cover. The fan is placed in an independent fan sound insulation room, and sound absorption and sound insulation are carried out in the fan room.
Shutters outside the ground floor should be silenced as much as possible.
The rotating parts such as fan impeller, fan shaft, belt pulley and coupling must undergo strict static balance and dynamic balance correction, and the platform can only be assembled after passing the test. It is allowed to leave the factory, and at the same time, the gap between the motor cooling blade and the air guide ring is reasonably selected, which effectively reduces the rotating noise of the motor cooling blade.
Regularly check whether the connecting bolts and anchor bolts of all parts of the fan are loose, and whether the bearings are abnormally worn or poorly lubricated. Whether the drive belt is tensioned, etc. If the situation is abnormal, stop immediately to eliminate it.
During installation, soft materials such as rubber, cork or felt board should be placed between the fan and the reinforced concrete foundation. The vibration transmitted by the centrifugal fan to the reinforced concrete foundation is weakened or eliminated to the maximum extent.
Installing a section of rubber hose at the air inlet and air outlet of the fan can minimize or eliminate the vibration transmitted to the air duct by the centrifugal fan at the rubber hose.
Reasonable selection of parameters such as the shape and diameter of motor cooling fan blades. Effectively reduce the eddy current noise of the motor cooling fan.
Mufflers are installed at the air inlet and air outlet of the fan through use holes.
A muffler is installed on the outer side of the fan exhaust port, and a muffler insert is built in to reduce noise through a muffler with a special structure. Muffler is an effective measure to reduce the radiation at the inlet and outlet of pneumatic equipment or transmit noise along the pipeline.
Fan suspension adopts damping spring hanger shock absorber.
According to the sound source object, noise characteristics, noise reduction requirements, process conditions and installation location and other factors, targeted design is carried out to ensure good noise elimination and noise reduction effect.
Many eddy currents are formed in the arc section. Vortex will frequently collide with the volute and air inlet parts of the fan for many times, forming aerodynamic noise. It can be designed and manufactured at the periphery of the fan volute at the fan inlet, that is, the rectifier ring and baffle are added, which can effectively prevent the airflow from forming vortex at the fan inlet, thus reducing the aerodynamic noise generated by the centrifugal fan.