高溫排煙風機是現在(zai)很(hen)多消防職業都在(zai)遍(bian)及運用的(de)(de)一種(zhong)消防專用風機(ji)。咱(zan)們都知道,風機(ji)在(zai)運用時,經(jing)常(chang)會伴有噪音的(de)(de)攪擾,而高溫排(pai)煙(yan)風機(ji)很(hen)好的(de)(de)完成(cheng)了無噪音的(de)(de)功(gong)能,具體(ti)情(qing)況(kuang)咱(zan)們來(lai)看看吧:
一(yi)、選用多孔(kong)(kong)(kong)吸聲(sheng)(sheng)資(zi)料(liao)(liao)(liao)(liao)的(de)(de)吸聲(sheng)(sheng)機理:資(zi)料(liao)(liao)(liao)(liao)內(nei)部(bu)有(you)很多細微的(de)(de)彼此貫穿的(de)(de)孔(kong)(kong)(kong)洞,當聲(sheng)(sheng)波入射到(dao)這些資(zi)料(liao)(liao)(liao)(liao)的(de)(de)外(wai)(wai)表,進而入射到(dao)這些細微的(de)(de)孔(kong)(kong)(kong)隙內(nei)時,要引起孔(kong)(kong)(kong)隙內(nei)的(de)(de)空(kong)氣運動(dong),緊靠孔(kong)(kong)(kong)壁(bi)和纖維外(wai)(wai)表的(de)(de)空(kong)氣,因摩擦和粘(zhan)滯運動(dong)阻力而不(bu)易運動(dong),使聲(sheng)(sheng)能轉(zhuan)化為(wei)熱能而消耗(hao)掉。故功能杰出(chu)的(de)(de)吸聲(sheng)(sheng)資(zi)料(liao)(liao)(liao)(liao)要多孔(kong)(kong)(kong),孔(kong)(kong)(kong)與(yu)孔(kong)(kong)(kong)之(zhi)間互相貫穿,而且貫穿的(de)(de)孔(kong)(kong)(kong)洞要與(yu)外(wai)(wai)界連通,使聲(sheng)(sheng)波能進入資(zi)料(liao)(liao)(liao)(liao)內(nei)部(bu)。
二、隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng):隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)所選用的(de)辦法是將(jiang)噪聲(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)封閉起來,運用隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)罩將(jiang)噪聲(sheng)(sheng)(sheng)(sheng)(sheng)控制在小(xiao)區(qu)域內。在聲(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)遇到屏蔽物時,因為(wei)界面特性阻抗的(de)改動,入(ru)射聲(sheng)(sheng)(sheng)(sheng)(sheng)能(neng)(neng)(neng)的(de)一(yi)部(bu)分被反(fan)射,一(yi)部(bu)分被吸收,一(yi)部(bu)分聲(sheng)(sheng)(sheng)(sheng)(sheng)能(neng)(neng)(neng)透(tou)(tou)進屏蔽物繼續傳達。資(zi)料的(de)隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)功能(neng)(neng)(neng)可(ke)用透(tou)(tou)聲(sheng)(sheng)(sheng)(sheng)(sheng)系(xi)數(shu)來表(biao)明。透(tou)(tou)聲(sheng)(sheng)(sheng)(sheng)(sheng)系(xi)數(shu)越小(xiao),表(biao)明透(tou)(tou)進去的(de)聲(sheng)(sheng)(sheng)(sheng)(sheng)能(neng)(neng)(neng)越少,資(zi)料的(de)隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)功能(neng)(neng)(neng)越好。資(zi)料的(de)隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)功能(neng)(neng)(neng)與隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)體的(de)結(jie)構、性質(zhi)和入(ru)射聲(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)的(de)頻(pin)率有關。
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