發(fa)電機(ji)組機(ji)房(fang)通風及消聲(sheng)。

實(shi)際工作中我們在考慮方(fang)案時(shi)既要(yao)有效降噪，又(you)要(yao)滿足發電(dian)機組(zu)運行需要(yao)的(de)空氣(qi)流量。

機房進風消聲系統

①為(wei)滿足機(ji)組運(yun)行時(shi)所(suo)需(xu)的冷卻風和燃燒空氣量，機(ji)房采用(yong)機(ji)械進風方式(shi)通(tong)風。

②在機房外用磚砌兩個進風道，進風道墻(qiang)體(ti)下分(fen)別安裝一臺低(di)噪聲軸流風機向(xiang)機房內送風。

③進(jin)風道內安(an)裝一(yi)臺大風量組合片式(shi)消聲器(qi)，吸(xi)收氣流噪(zao)聲和機械噪(zao)聲。

④進(jin)風道(dao)外墻體上開一進(jin)風口(kou)，進(jin)風口(kou)處安裝特別制作(zuo)的鋁合金百葉窗及防(fang)護絲網，防(fang)止異物(wu)進(jin)入風道(dao)內。

   發(fa)電(dian)(dian)機設備是我們(men)日常(chang)(chang)生(sheng)活(huo)中(zhong)經(jing)常(chang)(chang)遇到的(de)(de)噪(zao)(zao)(zao)音源，發(fa)電(dian)(dian)機在運行時能(neng)夠(gou)產生(sheng)95分貝以(yi)(yi)上的(de)(de)噪(zao)(zao)(zao)音。強烈的(de)(de)噪(zao)(zao)(zao)音對周(zhou)圍(wei)的(de)(de)人(ren)群以(yi)(yi)及環境(jing)造(zao)成(cheng)了(le)嚴重的(de)(de)影響，發(fa)電(dian)(dian)機降噪(zao)(zao)(zao)處(chu)理(li)(li)方(fang)案是治理(li)(li)發(fa)電(dian)(dian)機的(de)(de)有(you)效措施，能(neng)夠(gou)治理(li)(li)發(fa)電(dian)(dian)機振(zhen)動引起的(de)(de)低頻噪(zao)(zao)(zao)音，經(jing)過治理(li)(li)后(hou)噪(zao)(zao)(zao)音值在55分貝以(yi)(yi)下，滿足周(zhou)圍(wei)業主以(yi)(yi)及物業的(de)(de)降噪(zao)(zao)(zao)要求。

   發電(dian)(dian)(dian)機(ji)(ji)(ji)降(jiang)噪(zao)處(chu)(chu)理效(xiao)果：經過發電(dian)(dian)(dian)機(ji)(ji)(ji)降(jiang)噪(zao)處(chu)(chu)理方案治(zhi)理后，通過對發電(dian)(dian)(dian)機(ji)(ji)(ji)機(ji)(ji)(ji)房1米(mi)外進行多點測量噪(zao)音值(zhi)均在55分貝(bei)以下，符合《聲環境(jing)質量標(biao)準》等相關(guan)聲值(zhi)要求。

  柴油發(fa)電機(ji)噪(zao)(zao)(zao)(zao)音分(fen)為(wei)(wei)：機(ji)械(xie)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)、燃燒噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)和空氣動力(li)性(xing)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)三部(bu)分(fen)。一部(bu)分(fen)：機(ji)械(xie)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)則主要是(shi)曲軸、連桿、齒輪等(deng)構件的活動部(bu)分(fen)相(xiang)互碰撞和摩擦產生。機(ji)械(xie)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)的控制(zhi)，應在(zai)設(she)計階段(duan)就采取措(cuo)施。比(bi)如(ru)縮小缸徑，提高行程(cheng)缸徑比(bi)，發(fa)電機(ji)噪(zao)(zao)(zao)(zao)音治理(li)，降低(di)標(biao)定轉速，研(yan)制(zhi)低(di)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)柴油機(ji)；第二部(bu)分(fen)：直噴燃燒室的燃燒噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)常成為(wei)(wei)柴油機(ji)的主要聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源。改變噴嘴的提前角等(deng)措(cuo)施可以(yi)有效(xiao)降低(di)燃燒噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)；第三部(bu)分(fen)：空氣動力(li)性(xing)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)分(fen)為(wei)(wei)排氣、進氣和風扇噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)，其中以(yi)排氣噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)為(wei)(wei)距(ju)離排氣口(kou)0.5米處(chu)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級(ji)可達115-128dBA。此項噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)采用消聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器處(chu)理(li)很(hen)有效(xiao)。消聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器可以(yi)和濾(lv)清(qing)器復合使用。