Roots FansIn the process of using the pneumatic noise is too large, so what is the reason for this situation? How should it be solved? On this issue Roots fan editorial take you to understand.
1、Installation of muffler
In general, the aerodynamic noise radiated from the fan air intake and exhaust ports is 10-20dB(A) higher than the noise radiated from other parts, therefore, when controlling the fan noise, the first thing to do is to install appropriate mufflers on the air intake and exhaust official channels.
The muffler is used on the fan, at present, domestic and foreign countries tend to use the resistive muffler, and the muffler with larger volume and narrower muffling channel has been seldom used, of course, the muffler selection, design and installation should be carried out according to the actual situation.
2. Establishment of acoustic enclosures
The use of acoustic enclosure measures, that is, the entire fan unit with a closed acoustic enclosure surrounded. The technical key is to use what kind of cooling measures to ensure the normal operation of the fan. At present, both at home and abroad to use air-cooled method for **** common. The main forms of cooling are: self-fan ventilation cooling method, negative pressure suction cooling method, hood air circulation ventilation cooling method and external mechanical ventilation cooling method.
3. Modification of the fan room
If the wind turbine has a special wind machine room, it can be combined with the site conditions, to take the existing fan room into a sound insulation room method. That is, the fan is closed in the fan room so that the noise is not transmitted. The main technical measures are the use of soundproof doors, soundproof windows, soundproof barriers and wall soundproofing, the application of appropriate sound-absorbing materials.
4, pipe wrapping in order to attenuate the noise radiated from the fan duct, you can rotate the pipe wrapping, compartment noise from the path of dissemination.
5, vibration isolation comprehensive consideration of safety, stability and ease of maintenance and other factors, the design and selection of appropriate vibration isolators, in order to eliminate the rigid connection between the machine and the unit, so as to achieve the purpose of reducing solid vibration noise. Can also dig anti-vibration ditch to replace the foundation vibration isolation, can achieve certain results.