7+ effective centrifugal fan noise reduction methods

June 28, 2022

TABLE OF CONTENTS

Centrifugal fans are industrial fans with popular applications today. However, during use, they create noises that affect people around them. How to reduce noise from fan? Below are the 7+ effective centrifugal fan noise reduction methods. Similarly, axial fans can make noise when operating. See more here: axial fan noise reduction

Centrifugal fan noise affects surrounding activities

Install silencer at outlet/inlet

The noise from the inlet/outlet of the centrifugal fan often generates noise during operation. To reduce noise at the fan outlet and inlet, a silencer duct can be installed. Depending on the level of noise generation choose the appropriate length, weight, and type of silencer.

Anti-noise coating for the fan housing

After installing a silencer for the fan inlet and outlet. Noise can be emitted from the fan housing by sound radiation. Sound penetrates around the fan housing and radiates to the outside. To limit radiated noise around the case, you can increase the thickness of the fan shell material or use noise-proof coatings or noise-proof hard panels for the fan housing. Thus, the fan noise is also significantly reduced.

Reduce noise when opening the fan shaft

One of the causes of noise for centrifugal fans is that around the fan shaft and housing there is a clearance around the shaft. Depending on the size of the shaft and clearance, when the centrifugal fan is operating, it can cause noise. If the fan structure encounters this situation, measures should be taken to seal these gaps. This can significantly reduce the noise of the centrifugal fan.

Vibration Isolator

Parts such as fan motor, fan shaft, propeller… are active parts that create vibration. Vibration isolators are used to reduce vibration transmission from fans to other structures. If the fan is fitted with a vibration isolator, the fan should have a flexible input and output connector. Typically, terminals or crimp joints, if specified, are installed for isolation, but options are available to reduce airborne noise through the connector.

Spread system

Using a transmission system thanks to sound-absorbing materials. The noise diffusion greatly reduces the noise for the centrifugal fan.

🔰 USEFUL INFORMATION

📣 Centrifugal fan maintenance checklist from A-Z

📣 Types of centrifugal fans and the selection of suitable fans

Choosing the right centrifugal fan

Select a centrifugal fan with parameters suitable for use requirements. Avoid using centrifugal fans with too large specifications, not using the full capacity of the fan, and causing excess airflow when in use. The more powerful the fan, the louder the noise it makes, so choose the right fan. Avoid costly investments and avoid causing the loud noise.

Install the fan in a flat position

Fan installation location can be the cause of loud noise. It is necessary to install the fan firmly and firmly on a flat surface. Helps the fan operate more quietly, limiting noise.

There is a foreign object stuck in the fan

During operation, suddenly the fan makes a loud noise. A foreign object may be trapped inside the fan. The technician needs to check if the fan is blocked.

There are many causes of centrifugal fan noise. Depending on each case, there are effective noise reduction measures. Hopefully, the above information can help you reduce noise for centrifugal fans effectively.

SYSTEM FAN GROUP

System Fan Global Group is a unit specializing in manufacturing quality centrifugal fans, distributed worldwide. Our centrifugal fan products ensure low noise, quiet operation, and excellent use. If you want to buy centrifugal fans, please contact us immediately. We are happy to serve and quote the most detailed price.