Using industrial fans for ventilation, cooling, dust extraction, and exhaust gas extraction is widely available today. However, after a period of use, industrial fans make noise. This affects other activities in the factory. So how to reduce industrial fan noise? Here are some solutions for you.
Identify generated noise
To solve the problem of the fan running with a loud noise, it is necessary to find the cause of the noise. What causes the noise and how to fix it?
There are 2 types of industrial fan noise:
– Aerodynamic noise: Produced from the details of the fan that affect the movement of the airflow. The vortex motion of the air stream with the oscillating wheel creates air waves that cause vibrations in the parts. Hence the noise.
– Mechanical noise of the fan: The causes of mechanical noise are: the surface of the fan is not flat, the impeller is not balanced, the fan has weak stability… These problems cause quite a bit of noise. large when the industrial fan is operating.
– The noise is caused by a foreign object in the fan
With 3 cases causing noise above, how to solve industrial fans to reduce noise? Find out below.
Ways to reduce noise for industrial fans
Choose a suitable installation location
In a space with many active people, the location of the fan should be chosen so that it is far away from the location where there are people. In these areas, pay attention to choosing industrial fans with the recommended noise level so as not to affect people. For details see the table below:
In office buildings: The recommended noise level is 40-65 dB(A)
Similarly, we have the following recommended noise levels:
– Hospital: 40-55 db
– School: 35-55 db
– Recording room: 20 – 30 db
– Hostels, hotels: 30 – 55 db
– Mall: 45 – 55 db
– Offices, offices: 25 -40db
– …
It is required that when installing the fan, it is necessary to choose a fan with the recommended noise level to ensure that the industrial fan does not cause loud noise.
Install sound insulation, sound absorption
One of the effective noise reduction methods is to use sound-absorbing and sound-insulating materials to reduce noise for industrial fans. Soundproofing methods can be used to limit noise emitted to other spaces. Materials used for sound reduction and sound insulation such as cotton, wood, foam, synthetic materials, etc.
Use silencer for fan
To reduce fan noise, silencers can be installed at both ends of the fan, pipeline, or motor to reduce noise.
Radiant noise reduction: Radiant noise is the sound that penetrates the enclosure around the fan. To reduce radiated noise, it is possible to increase the thickness of the fan housing or use sound insulation.
Noise reduction at both ends of the fan: Noise can be emitted from the fan inlet/outlet. Install silencers at the ends or silencers between the fan and the ductwork. Industrial fan noise can be somewhat reduced.
Soundproof cover for the fan
Reduce fan noise by soundproofing the fan, minimizing the source of mechanical noise from industrial fans. Currently, System Fan Global has industrial fans wrapped with super quiet, fireproof soundproofing. Find out on our website now.
Check and maintain regularly
Regular maintenance, maintenance, and cleaning of the fan is an effective way to limit noise generation. The fan may make loud noises after a while of operation. Due to reasons such as loose screws, worn parts, and foreign objects stuck in the fan. These cases will be easily detected in time when you periodically maintain, service, and clean the fan.
Check it out here: Industrial fan maintenance checklist may interest you
Dynamic balance for propellers
After a period of use, the industrial propeller becomes unbalanced, causing vibration and loud noise when the fan is operating. Dynamic balance of the propeller will help the propeller balance, operate smoothly with low noise.
Above, System Fan Global provides some causes and ways to reduce noise for industrial fans. Hope this information is useful for readers.