風機消聲器分為:離心風(feng)(feng)機消(xiao)聲(sheng)(sheng)(sheng)器(qi)、羅茨風(feng)(feng)機消(xiao)聲(sheng)(sheng)(sheng)器(qi)、鼓(gu)風(feng)(feng)機消(xiao)聲(sheng)(sheng)(sheng)器(qi)、軸流風(feng)(feng)機消(xiao)聲(sheng)(sheng)(sheng)器(qi)。風(feng)(feng)機消(xiao)音器(qi)主要用于降低(di)各(ge)種風(feng)(feng)機風(feng)(feng)口(kou)、風(feng)(feng)道和封(feng)閉(bi)式機房(fang)進風(feng)(feng)口(kou)的空氣動力性噪聲 。
根據風機進出口結構不同,分為圓形結構和矩形結構。
(1)圓形結構分用于風機接管口為圓形,又分為A、B型兩種, A型兩端均為法蘭盤,直接串接于管道中(即管道消聲器), B型一端為法蘭,另一端為直接大氣排空(可裝防雨風帽),僅供設置在室外管道末端和封閉式機房進風口選用。
(2)圓形(xing)結(jie)(jie)構中的阻(zu)式消(xiao)聲(sheng)(sheng)(sheng)(sheng)片一般厚度為100 mm,150 mm,消(xiao)聲(sheng)(sheng)(sheng)(sheng)量15-30dB,在(zai)風速5-12m/s的條件下,適用(yong)(yong)風量為1000-50000 m3/h。其結(jie)(jie)構中對高頻(pin)噪聲(sheng)(sheng)(sheng)(sheng)和低頻(pin)噪聲(sheng)(sheng)(sheng)(sheng)消(xiao)聲(sheng)(sheng)(sheng)(sheng)采(cai)用(yong)(yong)阻(zu)抗兩(liang)種消(xiao)聲(sheng)(sheng)(sheng)(sheng)區(qu),用(yong)(yong)以最大(da)限度的增寬消(xiao)聲(sheng)(sheng)(sheng)(sheng)頻(pin)帶。