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International Journal of Safety v.3 no.1, 2004년, pp.6 - 9  

A Study on the Noise Reduction of Reciprocating Type Air Compressors

Lee Kwang-Kil    (Dept. of Safety Engineering Research Occupational Safety & Health Research Institute   ); Kim Kwang-Jong    (Korea Occupational Safety and Health Agency   ); Lee Gwan-Hyung    (Korea Occupational Safety and Health Agency   ); Park Jae-Suk    (Korea Occupational Safety and Health Agency   ); Son Doo-ik    (Dept. of Safety Engineering, Korea Occupational Safety and Health Atency   ); Kim Bong-Ki    (Acoustics Group, Korea Institute of Machinery and Materials   ); Lee Dong-Ju    (Dept. of Mechanical Eng., Chungnam National University  );
  • 초록

    This paper deals with the noise evaluation technique of a reciprocating air-compressor and its noise reduction. The reciprocating air-compressors are widely used in the small, medium sized industrial firms, and lots of their employees are affected and irritated by their noise in the workplace. Thus, noise control actions should be taken appropriately by considering the hearing loss due to the occupational noise exposure. Lead-wrapping techniques are employed to identify the contribution of principal noise sources which are generally known as motor, belts, suction/discharge valves, moving pistons, and flow-induced noise caused by edges or discontinuities along the flow path e.g. expansions, contractions, junctions and bends etc .. As a result, main noise sources of the air-compressor can be categorized by the suction/discharge noise, valve noise, and compressed-air tank noise. Based on the investigations, mufflers are designed to reduce both the suction/discharge noise and the compressed-air tank noise. Instead of the conventional valve plate, polyethylene resin is used as a new one for the reduction of valve impact noise. In addition, attempts are made to reduce the valve noise propagation to the cylinder head and the compressor tank by using the insulation casings. As a result of the countermeasure plans, it can be achieved that the noise reduction of the air-compress is up to 10dB.


  • 주제어

    noise reduction .   air compressor.  

  • 참고문헌 (4)

    1. MIL-STD-740-1(SH)-1986, 'Airbome sound measure-ments and acceptance criteria of shipboard equipment 
    2. M. L. Munjal, Acoustics of Ducts and Muffters, John Wiley & Sons, Inc., 1987 
    3. Leo L. Beranek, Noise and Vibration Control, McGraw-Hill, 1971 
    4. ISO 1680/1-1986, 'Acoustics-test code for the mea-surement of airbome noise emitted by rotating electri-cal machinery - Part 1: Engineering method for free-field conditions over a reflecting plane.' 

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    2. 1993 "전기기계.기구의 폭발방지" 전기학회지= The Processing of the Institute of Electrical Engineers 42 (2): 48~59    
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    8. 2005 "A Study on the Better Operation of Occupational Safety and Health Management Systems" International Journal of Safety 4 (1): 32~37    
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    10. 2008 "보건의료업의 안전보건활동 및 안전문화의식정도 - 음식·숙박·가스·전기업종과의 비교 -" 산업간호학회지 = Korean Journal of Occupational Health Nursing 17 (2): 239~249    

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