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Punch noise reduction project implementation

Release date: 2018-02-01 14:48:40 Visits: 1677

1, workshop reverberation time and the noise value of each noise source to determine: reverberation time refers to the indoor sound to a steady state, the sound source to stop sound after the residual sound absorption in the room through the wall back and forth absorption, the average sound energy density decreased to the original The value of one millionth of a second. The longer the reverberation time, the more the sound is reflected in the workshop and the energy decay rate is slower. The workshop with long reverberation time under the same sound source has more noise than the workshop with shorter reverberation time.
2, the choice of sound-absorbing materials: a total of five parts of sound insulation board, noise through the hole into the sound-absorbing cotton puncher, part of the glass wool through the vibration energy will be converted into heat consumed, the other part of the outer layer of steel isolated, Suction share the purpose of sharing. (1) An outer steel plate with a thickness of 2 mm, which plays the role of sound insulation and support, and is the outer surface of the sound absorbing panel. (2) The middle part of sound-absorbing board is sound-absorbing material made of glass wool, which is used to absorb sound energy and is the main component of noise-reducing material. (3) Fibreboard attached to the outside of the sound-absorbing cotton to prevent sound-absorbing cotton fall. (4) sound-sensitive film attached to both sides of the sound-absorbing cotton, moisture-proof and prevent the cotton wool from the inner perforated plate mesh shedding role.
3, the sound-absorbing board sealing process: the closure of the entire production line is a number of small sound-absorbing panels spliced into a closed body, so in order to ensure noise reduction effect, in the design and manufacture of the need to control the gap between the various sound-absorbing panels, Generally 1 ~ 2mm. In order to prevent noise from passing through these gaps as much as possible to affect the noise reduction effect, sealant is usually used for gap sealing.
4, Ventilation: As the heat generated by the operation of the device itself, combined with the insulation properties of glass wool sound-absorbing material, the internal temperature of the production line is often 3 ~ 5 ℃ higher than the outside after the closure. When noise reduction works are carried out, an exhaust fan is usually installed on the soundproof wall to remove the hot air in the enclosed space to create a negative pressure inside. External air can flow into the interior through the noise insulation wall. In the selection of exhaust fan selection of low-noise fan so as not to affect the effect of noise reduction.
5, lighting treatment: Since the closure of the project after the implementation of the equipment inside and outside the workshop lighting isolated, so the need to increase the body lighting system. In order to ensure the production and maintenance of lighting equipment needed for the latter part of the design illuminance of 500 lumens or more. Enclosed body lighting system for separate wiring, independent switching, to ensure easy to use and does not affect the original power supply system. In addition, in order to prevent a sudden power outage in the workshop, an emergency lighting system was installed in the enclosure to ensure the safety of equipment and personnel.