The control of air compressor noise mainly adopts three aspects: muffler, muffler tunnel and sound insulation technology:
Install the muffler
The main noise source is the intake and exhaust ports, and appropriate intake and exhaust mufflers should be selected. The frequency spectrum of the air compressor intake noise is low frequency, and the intake muffler should use a resistance structure or an impedance composite structure with individual and resistance as the mainstay. The exhaust air pressure of the air compressor is large and the airflow velocity is high, so a small hole muffler should be used at the exhaust port of the air compressor.
Set up a muffler tunnel
Underground or semi-underground tunnels of sound-absorbing tunnels, the tunnel walls are made of bricks with good sound absorption. Connect the intake pipe of the air compressor to the muffler tunnel so that the air enters the air compressor through the muffler tunnel. The use of muffler tunnels can greatly reduce the intake noise of the air compressor, and the service life is longer than that of ordinary mufflers.
Build sound enclosures
After installing the muffler or setting up the muffler tunnel at the inlet and exhaust ports of the air compressor, the airflow noise can be reduced to below 80db(a), but the mechanical noise and motor noise of the air compressor are still very high, so it should be Install sound insulation cover on the unit of the machine. Suspended space sound absorber: In Foshan Linggefeng Air Compressor Station, the tall and empty workshop has heavy reverberation. If the sound-absorbing body is dispersed and suspended on the ceiling of the workshop, the noise of the workshop can be reduced by 3-10db(a), and the reverberation time can be reduced by 5-10s.