The control of air compressor noise mainly adopts three aspects: muffler, anechoic tunnel and sound insulation technology:
1. Install the muffler
The main noise source is the intake and exhaust ports, and a suitable intake and exhaust muffler should be used. The spectrum of the air intake noise of the air compressor is characterized by low frequency. The air intake muffler should adopt a resistance structure or a resistance-composite structure with resistance and resistance. The air compressor has a large exhaust gas pressure and a high air flow rate. A small hole muffler should be used at the air compressor exhaust port.
2. Set the anechoic tunnel
The underground or semi-underground tunnel of the anechoic tunnel, the wall of the tunnel is made of sound-absorbing bricks. Connect the air intake pipe of the air compressor to the muffler tunnel to allow air to enter the air compressor through the muffler tunnel. The use of the muffler tunnel can greatly reduce the intake noise of the air compressor and the service life is longer than that of the general muffler.
3. Establish sound insulation cover
After the muffler is installed in the inlet and exhaust ports of the air compressor or the muffler tunnel is installed, the airflow noise can be reduced to below 80db(a), but the mechanical noise and motor noise of the air compressor are still high, so it should also be in air pressure. An acoustic enclosure is installed on the unit of the machine. 4, hanging space sound absorber: In Foshan Lingge wind and air compressor station, the tall and empty factory reverberation is very heavy. If the sound absorber is dispersed in the ceiling of the factory, the noise of the plant can be reduced by 3-10db(a) and the reverberation time is reduced by 5-10s.