微穿孔板消聲器

微(wei)穿孔(kong)(kong)(kong)(kong)板消聲(sheng)器是利用微(wei)穿孔(kong)(kong)(kong)(kong)板吸聲(sheng)結構制成(cheng)的(de)一(yi)(yi)種新型消聲(sheng)器。不用任何多孔(kong)(kong)(kong)(kong)吸聲(sheng)材料，只(zhi)在厚度小(xiao)于1mm的(de)薄金屬(shu)板上鉆許多微(wei)孔(kong)(kong)(kong)(kong)，這些微(wei)孔(kong)(kong)(kong)(kong)的(de)孔(kong)(kong)(kong)(kong)徑一(yi)(yi)般為0.5~1mm左(zuo)右，穿孔(kong)(kong)(kong)(kong)率在1%~3%之間，在穿孔(kong)(kong)(kong)(kong)板后留(liu)有一(yi)(yi)定的(de)空(kong)腔，就(jiu)成(cheng)為微(wei)穿孔(kong)(kong)(kong)(kong)板吸聲(sheng)結構。

詳細介紹

微(wei)穿(chuan)(chuan)孔(kong)板(ban)(ban)(ban)消聲(sheng)(sheng)器是利(li)用微(wei)穿(chuan)(chuan)孔(kong)板(ban)(ban)(ban)吸(xi)聲(sheng)(sheng)結構制(zhi)成(cheng)的(de)一(yi)(yi)種(zhong)新型消聲(sheng)(sheng)器。不(bu)用任何多孔(kong)吸(xi)聲(sheng)(sheng)材料，只在厚度小于1mm的(de)薄金屬板(ban)(ban)(ban)上鉆許(xu)多微(wei)孔(kong)，這些微(wei)孔(kong)的(de)孔(kong)徑一(yi)(yi)般為(wei)0.5~1mm左右(you)，穿(chuan)(chuan)孔(kong)率(lv)在1%~3%之間，在穿(chuan)(chuan)孔(kong)板(ban)(ban)(ban)后留有一(yi)(yi)定(ding)的(de)空腔(qiang)，就成(cheng)為(wei)微(wei)穿(chuan)(chuan)孔(kong)板(ban)(ban)(ban)吸(xi)聲(sheng)(sheng)結構。微(wei)穿(chuan)(chuan)孔(kong)板(ban)(ban)(ban)是高聲(sheng)(sheng)阻、低(di)聲(sheng)(sheng)質(zhi)量(liang)的(de)吸(xi)聲(sheng)(sheng)元件。
微(wei)穿(chuan)(chuan)孔板(ban)(ban)(ban)聲(sheng)學結(jie)(jie)構在消聲(sheng)技(ji)術領域有十分廣(guang)泛的(de)(de)應(ying)用(yong)，微(wei)穿(chuan)(chuan)孔板(ban)(ban)(ban)消聲(sheng)器(qi)用(yong)金屬穿(chuan)(chuan)孔薄板(ban)(ban)(ban)制(zhi)成，常見的(de)(de)微(wei)穿(chuan)(chuan)孔板(ban)(ban)(ban)可(ke)用(yong)鋼板(ban)(ban)(ban) （管(guan)）、不銹鋼板(ban)(ban)(ban) （管(guan)）、合金板(ban)(ban)(ban)（管(guan)）等材料(liao)制(zhi)作(zuo)，由于微(wei)穿(chuan)(chuan)孔板(ban)(ban)(ban)后(hou)的(de)(de)空氣(qi)層(ceng)(ceng)內(nei)(nei)可(ke)填裝(zhuang)多孔性巖棉材料(liao)，即利用(yong)吸(xi)(xi)(xi)聲(sheng)材料(liao)的(de)(de)阻性吸(xi)(xi)(xi)聲(sheng)原理(li)，進一(yi)(yi)步達(da)到降噪消聲(sheng)目的(de)(de)。其吸(xi)(xi)(xi)聲(sheng)系數高，吸(xi)(xi)(xi)收(shou)(shou)頻帶(dai)(dai)寬，壓力損(sun)失很(hen)小(xiao)，氣(qi)流再生噪聲(sheng)低，且易于控制(zhi)。為獲得寬頻帶(dai)(dai)高吸(xi)(xi)(xi)收(shou)(shou)效果，一(yi)(yi)般(ban)用(yong)雙層(ceng)(ceng)微(wei)穿(chuan)(chuan)孔板(ban)(ban)(ban)結(jie)(jie)構。微(wei)穿(chuan)(chuan)孔板(ban)(ban)(ban)與外(wai)殼之(zhi)間以(yi)及微(wei)穿(chuan)(chuan)孔板(ban)(ban)(ban)之(zhi)間的(de)(de)空腔(qiang)尺寸大小(xiao)按需(xu)要(yao)吸(xi)(xi)(xi)收(shou)(shou)的(de)(de)頻帶(dai)(dai)不同而異，吸(xi)(xi)(xi)收(shou)(shou)低頻、中頻、高頻時，空腔(qiang)尺寸依次(ci)為150～200mm、80～120mm和30～50mm，雙層(ceng)(ceng)結(jie)(jie)構的(de)(de)前(qian)(qian)腔(qiang)深(shen)度(du)(du)一(yi)(yi)般(ban)應(ying)小(xiao)于后(hou)腔(qiang)，前(qian)(qian)后(hou)腔(qiang)深(shen)度(du)(du)之(zhi)比不大于1:3，前(qian)(qian)部(bu)接(jie)近氣(qi)流的(de)(de)一(yi)(yi)層(ceng)(ceng)微(wei)穿(chuan)(chuan)孔板(ban)(ban)(ban)穿(chuan)(chuan)孔率(lv)應(ying)高于后(hou)層(ceng)(ceng)，為減小(xiao)軸向聲(sheng)傳(chuan)播(bo)的(de)(de)影響(xiang)，可(ke)在微(wei)穿(chuan)(chuan)孔板(ban)(ban)(ban)消聲(sheng)器(qi)的(de)(de)空腔(qiang)內(nei)(nei)每隔(ge)(ge)500mm左右(you)加一(yi)(yi)塊(kuai)橫(heng)向隔(ge)(ge)板(ban)(ban)(ban)。
若采用(yong)薄(bo)金屬板，則具(ju)有耐高溫(wen)、防(fang)濕、防(fang)火(huo)、防(fang)腐等(deng)獨特的優點，適用(yong)性(xing)強且還適宜在高速(su)氣(qi)流流場(chang)中使用(yong)，例(li)如放空排(pai)氣(qi)、內燃機(ji)(ji)、空壓機(ji)(ji)等(deng)排(pai)氣(qi)系統，壓力損(sun)失小。
產品特點
微穿孔板消聲器具有如下的特(te)點：
1、不(bu)僅具有阻抗復合式(shi)消聲器的(de)特點，而且有較寬的(de)消聲頻帶；
2、可用金屬結構(gou)代替消聲材料，同時(shi)它還(huan)有耐(nai)高溫、耐(nai)油、防(fang)水、防(fang)火和防(fang)腐蝕等(deng)特性(xing)；
3、微穿孔板穿孔率低，表面光潔，氣(qi)流的阻力小，適用于阻損要求(qiu)小的設備；
4、氣(qi)流再生(sheng)噪聲低，適用于(yu)較(jiao)高(gao)速氣(qi)流的情況，尤其(qi)適用于(yu)放空排氣(qi)；
5、可用于(yu)對衛(wei)生(sheng)環境要求嚴(yan)格的醫(yi)藥、食品(pin)等行業。

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微穿孔板消聲器

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微穿孔板消聲器

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