微穿孔板消聲器

微穿(chuan)(chuan)(chuan)孔板(ban)消(xiao)聲(sheng)器是利用(yong)微穿(chuan)(chuan)(chuan)孔板(ban)吸聲(sheng)結(jie)構(gou)制成(cheng)的(de)一(yi)(yi)種新型消(xiao)聲(sheng)器。不用(yong)任何多(duo)孔吸聲(sheng)材料，只(zhi)在(zai)厚(hou)度小于(yu)1mm的(de)薄金屬板(ban)上(shang)鉆許多(duo)微孔，這(zhe)些(xie)微孔的(de)孔徑一(yi)(yi)般(ban)為0.5~1mm左右(you)，穿(chuan)(chuan)(chuan)孔率在(zai)1%~3%之間，在(zai)穿(chuan)(chuan)(chuan)孔板(ban)后留有一(yi)(yi)定的(de)空腔，就(jiu)成(cheng)為微穿(chuan)(chuan)(chuan)孔板(ban)吸聲(sheng)結(jie)構(gou)。

詳細介紹

微穿(chuan)孔(kong)(kong)(kong)板(ban)消聲(sheng)(sheng)器(qi)(qi)是利用微穿(chuan)孔(kong)(kong)(kong)板(ban)吸聲(sheng)(sheng)結(jie)(jie)構制成(cheng)的(de)一(yi)(yi)種(zhong)新(xin)型消聲(sheng)(sheng)器(qi)(qi)。不(bu)用任何(he)多(duo)孔(kong)(kong)(kong)吸聲(sheng)(sheng)材料，只在(zai)厚度小(xiao)于1mm的(de)薄金屬板(ban)上鉆許多(duo)微孔(kong)(kong)(kong)，這些微孔(kong)(kong)(kong)的(de)孔(kong)(kong)(kong)徑一(yi)(yi)般為0.5~1mm左右，穿(chuan)孔(kong)(kong)(kong)率在(zai)1%~3%之(zhi)間，在(zai)穿(chuan)孔(kong)(kong)(kong)板(ban)后留有一(yi)(yi)定(ding)的(de)空腔，就成(cheng)為微穿(chuan)孔(kong)(kong)(kong)板(ban)吸聲(sheng)(sheng)結(jie)(jie)構。微穿(chuan)孔(kong)(kong)(kong)板(ban)是高(gao)聲(sheng)(sheng)阻、低聲(sheng)(sheng)質量(liang)的(de)吸聲(sheng)(sheng)元件。
微(wei)(wei)穿(chuan)(chuan)(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)板(ban)(ban)聲(sheng)學結構在(zai)消聲(sheng)技術領域有十(shi)分廣泛的(de)(de)(de)(de)應(ying)用(yong)(yong)，微(wei)(wei)穿(chuan)(chuan)(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)板(ban)(ban)消聲(sheng)器用(yong)(yong)金屬(shu)穿(chuan)(chuan)(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)薄板(ban)(ban)制(zhi)成(cheng)，常(chang)見的(de)(de)(de)(de)微(wei)(wei)穿(chuan)(chuan)(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)板(ban)(ban)可(ke)用(yong)(yong)鋼板(ban)(ban) （管）、不銹鋼板(ban)(ban) （管）、合金板(ban)(ban)（管）等材料制(zhi)作，由于(yu)微(wei)(wei)穿(chuan)(chuan)(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)板(ban)(ban)后(hou)的(de)(de)(de)(de)空(kong)氣層(ceng)內(nei)可(ke)填裝多(duo)孔(kong)(kong)(kong)(kong)性(xing)巖棉(mian)材料，即(ji)利(li)用(yong)(yong)吸(xi)(xi)(xi)聲(sheng)材料的(de)(de)(de)(de)阻性(xing)吸(xi)(xi)(xi)聲(sheng)原理(li)，進一步達到降(jiang)噪消聲(sheng)目的(de)(de)(de)(de)。其吸(xi)(xi)(xi)聲(sheng)系數高(gao)，吸(xi)(xi)(xi)收頻帶(dai)寬(kuan)，壓力損(sun)失很小(xiao)，氣流(liu)再生噪聲(sheng)低，且易于(yu)控(kong)制(zhi)。為獲得寬(kuan)頻帶(dai)高(gao)吸(xi)(xi)(xi)收效果(guo)，一般(ban)用(yong)(yong)雙層(ceng)微(wei)(wei)穿(chuan)(chuan)(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)板(ban)(ban)結構。微(wei)(wei)穿(chuan)(chuan)(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)板(ban)(ban)與外殼之間(jian)(jian)以及微(wei)(wei)穿(chuan)(chuan)(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)板(ban)(ban)之間(jian)(jian)的(de)(de)(de)(de)空(kong)腔(qiang)尺寸(cun)大小(xiao)按需要吸(xi)(xi)(xi)收的(de)(de)(de)(de)頻帶(dai)不同而異，吸(xi)(xi)(xi)收低頻、中頻、高(gao)頻時(shi)，空(kong)腔(qiang)尺寸(cun)依次為150～200mm、80～120mm和30～50mm，雙層(ceng)結構的(de)(de)(de)(de)前(qian)腔(qiang)深度(du)(du)一般(ban)應(ying)小(xiao)于(yu)后(hou)腔(qiang)，前(qian)后(hou)腔(qiang)深度(du)(du)之比不大于(yu)1:3，前(qian)部接近氣流(liu)的(de)(de)(de)(de)一層(ceng)微(wei)(wei)穿(chuan)(chuan)(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)板(ban)(ban)穿(chuan)(chuan)(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)率應(ying)高(gao)于(yu)后(hou)層(ceng)，為減小(xiao)軸(zhou)向聲(sheng)傳播的(de)(de)(de)(de)影響(xiang)，可(ke)在(zai)微(wei)(wei)穿(chuan)(chuan)(chuan)(chuan)(chuan)孔(kong)(kong)(kong)(kong)板(ban)(ban)消聲(sheng)器的(de)(de)(de)(de)空(kong)腔(qiang)內(nei)每隔500mm左右加一塊橫(heng)向隔板(ban)(ban)。
若采用(yong)(yong)薄金屬板，則具有耐高溫、防濕、防火(huo)、防腐等獨特的(de)優點(dian)，適用(yong)(yong)性強(qiang)且還(huan)適宜在高速氣(qi)流流場中使用(yong)(yong)，例如放空(kong)排氣(qi)、內燃機、空(kong)壓機等排氣(qi)系統(tong)，壓力損失小。
產品特(te)點
微穿孔板消聲器具(ju)有如下的特點：
1、不僅(jin)具有(you)阻抗復合式(shi)消聲(sheng)(sheng)器(qi)的(de)特點，而且有(you)較寬的(de)消聲(sheng)(sheng)頻(pin)帶；
2、可用金屬結構代替消聲材料，同(tong)時它還(huan)有耐高溫、耐油、防水、防火和(he)防腐(fu)蝕等特(te)性；
3、微穿孔板穿孔率低，表面光潔，氣流的阻力小，適用于阻損要求小的設備；
4、氣(qi)(qi)流再(zai)生噪聲低(di)，適用于較高速氣(qi)(qi)流的情況(kuang)，尤(you)其適用于放空排氣(qi)(qi)；
5、可用于對(dui)衛生環(huan)境要求(qiu)嚴(yan)格的醫藥(yao)、食品等行業。

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