小孔復(fù)合消音降噪裝置的設(shè)計(jì)和應(yīng)用

Design and Application of Small Hole Composite Muffler Noise Reduction Device

摘要: 分析了現(xiàn)場噪音的原因，采用抗性消音、小孔消音的消音原理，設(shè)計(jì)了一種小孔復(fù)合消音降噪裝置。從現(xiàn)場布局、設(shè)備設(shè)計(jì)和工藝流程等方面介紹該復(fù)合消音降噪裝置的應(yīng)用情況，并對(duì)具體使用效果進(jìn)行評(píng)估。降噪筒上均勻布置Φ2 mm小孔，一端封閉；當(dāng)氣流經(jīng)過降噪筒上的小孔時(shí)，壓力和流速減小，噴氣噪聲的頻率就會(huì)移向高頻或超高頻，明顯降低頻譜中的可聽聲成分，從而達(dá)到降噪目的，使噪音從110 dB降到80 d B。

Abstract: A type of small hole composite muffler is designed，basing on the analysis of the causes for the noise on field，as well as the muffling principles of reactive muffler and small-hole muffler.Introduced are the application conditions of the said muffler such as the field arrangement，the device design and the process flow.The performance of the application is also evaluated.The noise reduction cylinder is evenly covered with Φ2 mm holes and sealed up on one end.When air passes by the holes on the cylinder，its pressure and flow rate is reduced，so the jet noise will shift to high or ultrahigh frequency range and its audible frequency part will be significantly reduced.In this way the noise is reduced from 110 dB to 80 dB.