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关键词：空压机；隔声间；噪声；控制
The design to sound insulation of an air compressor room
Design Direction: With the development of modern industry, environmental pollution with the generated noise pollution is a kind of environmental pollution has become a major hazard to humans. Noise pollution is a serious threat to human health contemporary world, contemporary environment one of the main sources of pollution. Noise pollution not only has a negative impact on people's sense of self and the ability to work, and can lead to serious health disorders, fatigue, early hearing loss, high blood pressure, nerve disease. Noise harm is done directly on the human body: the destruction of human nervous, vascular spasm, accelerate the metabolism of the hair cells, thus speeding up the aging of the arrival. Clinical diagnosis: the external manifestations of the patient is a whole person in a bad mood, irritability, great voices; most common symptoms is tinnitus, ear pain, hearing loss, dizziness, headache, and noise-induced hearing loss in; infant growth and development stage, noise hazards in particular. Often in noisy environments baby not only hearing damage and intellectual development will also be affected. Sensorineural damage and hair cell damage caused by the noise, it is difficult to repair it.Industrial sources of noise pollution, air compressor as an important power equipment power source also brings more and more serious environmental problems. The air compressor is necessary production of many industrial enterprises auxiliary facilities, high noise generated in the course of its operation, not only the physical and mental health of the equipment operator a great risk, but also seriously pollute the environment. Therefore, to reduce and control the noise is the important issue of labor protection and environmental protection. This paper analyzes the composition of the air compressor noise sound source. Air compressor noise control and governance, that is, depending on the sound source parts to take control of the muffler, sound absorption and sound insulation measures, designed two sets of sound insulation design; by air compressor noise control examples illustrate the necessity and effectiveness of the air compressor noise control. There are basically three measures noise controls, noise suppression at the sound source, propagation pathways control, the receiver's protection.
Noise value exceeds the standard value is found primarily in the low frequency region, so the use of single-layer homogeneous dense wall. Acoustic wall: single-layer homogeneous dense wall of sound insulation performance and the frequency of the incident wave and the surface density, and in the interests of the mass law. Such maintenance structural elements inherent resonant frequency is very low, away from the commonly used sensitive the lower limit of the audible frequency range. So the use of walls and large surface density. In the choice of windows and doors, double soundproof windows and sealed acoustic doors to reduce noise spread.
The indoor acoustic design often used in sound-absorbing material and sound absorbing structure to reduce interior noise. Approach using a combination of resonant sound absorbing structure and porous sound-absorbing material. The porous sound-absorbing material based on the absorption, the high-frequency acoustic energy, while the resonance of the sound absorbing structure absorb acoustic energy in the low frequency band, and therefore select the combination of the porous sound-absorbing material with the resonance of the sound absorbing material structure, and can achieve full frequency the sound absorbing effect. The design to take sound-absorbing perforated plate mounted in the ceiling, there is an energy conversion, to ensure that workers will not be long-term exposure to noise cause hearing loss and other occupational, low-frequency noise.
Shock absorber can reduce the solid sound and airborne sound propagation, shock absorber with the metal spring shock absorber and isolation elastic cushioning material, due to the large range of metal spring shock absorber to withstand load, static pressure the shrinkage rate is also a great performance from low natural frequency, long service life and stability, mechanical properties are better, and the isolation effect would be better, after comparing the performance, so I chose the metal spring shock absorber. Sound insulation between both can be used to control noise at the source, but also in need of a quiet place to control extraneous noise, free from the interference. In this paper, on the basis of analysis of the noise current situation of plant equipment, introduces the basic principles and specific methods for the acoustic room design. Sound insulation sound insulation combines sound absorption, muffler and other measures to make the workshop (inside) reduced noise 20-50dB (A). Sound insulation design effectively control noise in the sound field to ensure the smooth progress of production to protect the safety and health of workers.