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Anonymous users2024-02-10Usually the methods to solve the problem of fan noise are as follows:
The noise of the casing and motor can be solved by installing a sound insulation cover, and the fan is placed in an independent fan sound insulation room, and the sound absorption and sound insulation treatment can be carried out in the fan room.
Exterior shutters on the ground floor are used as much as possible with sound-absorbing louvers.
Rotating parts such as fan impellers, fan shafts, pulleys and couplings must be strictly corrected for static balance and dynamic balance, and can only be assembled into a table after passing the qualification. At the same time, the gap between the motor cooling fan blades and the air guide ring should be reasonably selected to effectively reduce the rotational noise of the motor cooling fan blades.
Regularly check whether the connecting bolts and anchor bolts of each part of the fan are loose, and whether the bearings are abnormally worn or poorly lubricated. whether the transmission belt is tensioned, etc. If you find that the situation is abnormal, you should stop the car immediately to eliminate it.
When installing, soft materials such as rubber, cork board or felt board should be padded between the fan and the reinforced concrete foundation. The vibration transmitted by the centrifugal fan to the reinforced concrete foundation can be minimized or eliminated.
A section of rubber hose is installed at the air inlet and exhaust outlets of the fan, so that the vibration transmitted by the centrifugal fan to the air duct can be minimized or eliminated at the rubber hose.
Reasonable selection of motor cooling fan blades and other parameters. Effectively reduce the eddy current noise of the motor cooling fan.
The muffler is installed at the air inlet and exhaust outlet of the fan, and the muffler is made of pores.
A muffler is installed outside the exhaust vent of the fan, and the silencing insert is built-in to reduce noise when passing through the specially constructed muffler. Mufflers are an effective measure to reduce the radiation from the intake and exhaust ports of aerodynamic equipment or the noise transmitted along the pipes.
The fan is hung with a 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 that good noise reduction effect is obtained.
Many eddies are formed at the arc section. Eddy currents will collide with the fan volute and air inlet parts many times and frequently to form aerodynamic noise. The air inlet of the fan can be designed and manufactured at the periphery of the volute of the fan, that is, the fairing ring and baffle can be added, which can effectively prevent the air flow from forming vortex at the air inlet of the fan, thereby reducing the aerodynamic noise generated by the centrifugal fan.
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Anonymous users2024-02-09This part of the noise is mainly reduced by the use of inlet and outlet mufflers, and the addition of acoustic enclosures. Second, secondary noise. It is mainly produced when gas passes through pipes, especially elbows.
Noise reduction is achieved by wrapping with sound-absorbing materials.
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Anonymous users2024-02-08Strand fan? The one used in the kitchen? That's a lot of noise! But there doesn't seem to be any way to silence it! It might be better to put it on an iron plate and remove it and put it under the stove!
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Anonymous users2024-02-07First: mainly for the low-frequency vibration that makes people irritable and the low-frequency noise produced by the irregular vibration of the iron plate, the method: damping the blower, and then coating the sound insulation coating on the iron plate shell connected with the blower; If your iron plate housing is used as a hydrostatic pressure box, it is recommended to make a soft connection with the blower, provided that the soft connection also has a sound absorption effect.
The effect is average. Second: the overall acoustic cover. The air inlet muffler is installed, and the blower must be dampened. The effect is more obvious.
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Check that the oil in the tank is up to standard. Before starting the rotary blower, please take off the air inlet filter and pour about 30ml of oil into the main engine, so that the oil is evenly distributed inside the rotary blower (rotate a few times by hand). Check whether the tightness of the V-belt is appropriate, if it is too loose, please adjust it. >>>More