マルチバランス圧縮機の静粛化

概要

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A rotary type compressor used for air conditioning has been developed to satisfy very low vibration and noise level requirements. This paper describes the design technique for reduction of vibration and noise. Since vibrations in the compressor are mainly rotor unbalance vibrations due to the eccentricity of the rotary piston and the rotor bending flexibility, three plane balancing method is introduced instead of conventional two plane balancing method. The introduced balancing method is very effective even if bearing conditions vary. Owning to the 3 plane balancing, the developed compressor vibrations are successfully suppressed by 40% compared to the current compressor type. Noise reduction is also discussed with respect to silencer configurations installed in a compressed gas charge room. A new silencer structure is carefully designed with consideration of acoustic vibration mode shape of the room. According to the increase of the insertion loss of the silencer, the noise extremely reduced by-11dB compared with current type of compressor.
一般社団法人日本機械学会の論文
1992-06-25