三二○厂为了治理空气压缩机站严重的噪音污染,进行了长时间的消音研究,研制成两室串接式抗性扩张室消音装置。经一年多使用证明,消音效果很佳,完全达到了预定的技术指标。其噪音经南昌市环境监测站测量,由原来的105分贝A降低到72.5分贝A,比国家允许的噪音标准85分贝A还低10多分贝A。空气压缩机工作时产生噪音的地方很多,主要有进气声、排气声、齿轮油泵打油声,阀片的沙沙声,马达的嗡嗡声等。经过分析研究,认为这些噪音中居首位的是空气压缩机的进气口 March 20 plant in order to control the air compressor station serious noise pollution, conducted a long silence study, developed into a two-chamber series resistance expansion chamber silencer. After more than a year to prove that the silencer works well, fully meet the predetermined technical indicators. The noise was measured by Nanchang Environmental Monitoring Station from the original 105 dB down to 72.5 dB A, which is 10 dB lower than the national standard of 85 dB A. There are many places where the air compressor produces noise when it works. The main parts are air intake noise, exhaust noise, gear oil pump oil splash, rusty valve disc, motor buzz and so on. After analysis and research, that the noise in the first place is the air compressor inlet