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如何控制消防排煙風機的噪聲

   htf消防排煙風機噪聲的(de)(de)(de)(de)聲級(ji)不僅與風機結(jie)構有(you)關,還與工(gong)作(zuo)(zuo)狀態(tai)(全壓和風量)有(you)關。不同(tong)系列和不同(tong)類型(xing)的(de)(de)(de)(de)風機的(de)(de)(de)(de)聲級(ji)是(shi)不同(tong)的(de)(de)(de)(de)。在不同(tong)的(de)(de)(de)(de)工(gong)作(zuo)(zuo)條(tiao)件下,排氣扇的(de)(de)(de)(de)火災等(deng)級(ji)不同(tong)。當風機在高功率點工(gong)作(zuo)(zuo)時,聲級(ji)往(wang)往(wang)取量低(di)值.


   為(wei)了更(geng)好表征(zheng)風(feng)(feng)(feng)機(ji)的(de)(de)(de)噪聲(sheng)(sheng)(sheng)(sheng)功(gong)能(neng),出(chu)現(xian)了比(bi)(bi)(bi)(bi)A級(ji)這個(ge)概念.比(bi)(bi)(bi)(bi)A聲(sheng)(sheng)(sheng)(sheng)級(ji)是指(zhi)(zhi)通風(feng)(feng)(feng)機(ji)在單位(wei)流量(liang)(1米/分)和(he)單位(wei)全壓(ya)(1毫米水(shui)柱)下所發作的(de)(de)(de)A聲(sheng)(sheng)(sheng)(sheng)級(ji)..同(tong)(tong)一風(feng)(feng)(feng)機(ji)在不(bu)(bu)(bu)同(tong)(tong)工況下的(de)(de)(de)比(bi)(bi)(bi)(bi)A聲(sheng)(sheng)(sheng)(sheng)級(ji)是不(bu)(bu)(bu)同(tong)(tong)的(de)(de)(de).在高功(gong)率點上,比(bi)(bi)(bi)(bi)A聲(sheng)(sheng)(sheng)(sheng)級(ji)取量(liang)低值.不(bu)(bu)(bu)同(tong)(tong)系(xi)列的(de)(de)(de)風(feng)(feng)(feng)機(ji)在額定工況下的(de)(de)(de)比(bi)(bi)(bi)(bi)A聲(sheng)(sheng)(sheng)(sheng)級(ji)表征(zheng)了該系(xi)列風(feng)(feng)(feng)機(ji)噪聲(sheng)(sheng)(sheng)(sheng)級(ji)的(de)(de)(de)凹凸和(he)產(chan)品(pin)質量(liang)的(de)(de)(de)好壞.所以現(xian)在國內(nei)外多選用(yong)比(bi)(bi)(bi)(bi)A聲(sheng)(sheng)(sheng)(sheng)級(ji)作為(wei)風(feng)(feng)(feng)機(ji)噪聲(sheng)(sheng)(sheng)(sheng)的(de)(de)(de)限值指(zhi)(zhi)標(biao).同(tong)(tong)一系(xi)列不(bu)(bu)(bu)同(tong)(tong)類型的(de)(de)(de)風(feng)(feng)(feng)機(ji),其(qi)比(bi)(bi)(bi)(bi)A聲(sheng)(sheng)(sheng)(sheng)級(ji)大體鄰近.消防(fang)排煙風(feng)(feng)(feng)機(ji)加工精度愈高,氣(qi)動(dong)功(gong)能(neng)愈好,比(bi)(bi)(bi)(bi)A聲(sheng)(sheng)(sheng)(sheng)級(ji)愈低.

如何控制消防排煙風機的噪聲


控(kong)制(zhi)消防排煙風(feng)(feng)機(ji)噪(zao)(zao)聲的常用(yong)(yong)(yong)方法是(shi)在風(feng)(feng)機(ji)的進、出(chu)口處裝置阻性消聲器(qi).關(guan)于有更高(gao)降噪(zao)(zao)要求的場合(he),可(ke)以選用(yong)(yong)(yong)消聲隔(ge)聲箱,并在機(ji)組(zu)與地基(ji)之間安排減震器(qi).采(cai)用(yong)(yong)(yong)上述方法,一般可(ke)獲(huo)(huo)得明顯的降噪(zao)(zao)作用(yong)(yong)(yong).國內現已(yi)有許多噪(zao)(zao)聲控(kong)制(zhi)設備廠,可(ke)提(ti)供(gong)各(ge)類風(feng)(feng)機(ji)的消聲噪(zao)(zao)器(qi)、消聲隔(ge)聲箱及減震器(qi).消防排煙風(feng)(feng)機(ji)的噪(zao)(zao)聲問題,從技(ji)術(shu)上來講,在我國基(ji)本上已(yi)可(ke)獲(huo)(huo)得有用(yong)(yong)(yong)的控(kong)制(zhi),而且低噪(zao)(zao)聲風(feng)(feng)機(ji)也已(yi)開端出(chu)現.