【柴油機(ji)(ji)消聲(sheng)器】柴油機(ji)(ji)消聲(sheng)器有作用嗎 柴油機(ji)(ji)消聲(sheng)器原理

柴油機消聲器原理

是利用多孔吸聲材料來降低噪聲。把吸聲材料固定在氣流通道的內壁上或按照一定方式在管道中排列，就(jiu)(jiu)構成了(le)阻性消(xiao)音器(qi)。當聲(sheng)波進入阻性消(xiao)聲(sheng)器(qi)時，一部分聲(sheng)能(neng)在(zai)多孔(kong)(kong)材料的孔(kong)(kong)隙中摩擦而轉化成熱能(neng)耗散掉，使通過消(xiao)聲(sheng)器(qi)的聲(sheng)波減弱。阻性消(xiao)音器(qi)器(qi)就(jiu)(jiu)好(hao)像電(dian)學(xue)上的純電(dian)阻電(dian)路，吸聲(sheng)材料類似(si)于電(dian)阻。因此，人們(men)就(jiu)(jiu)把這種消(xiao)聲(sheng)器(qi)稱為阻性消(xiao)聲(sheng)器(qi)。阻性消(xiao)聲(sheng)器(qi)對中高頻消(xiao)聲(sheng)效果奸、對低頻消(xiao)聲(sheng)效果較差。

柴油機消聲器有作用嗎

消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)按(an)其(qi)工作(zuo)原理可分為阻(zu)(zu)性消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)、抗(kang)(kang)性消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)和(he)阻(zu)(zu)抗(kang)(kang)復合(he)(he)消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)。阻(zu)(zu)性消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)主(zhu)要(yao)是(shi)用(yong)(yong)吸(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)材(cai)(cai)料(liao)(liao)來消(xiao)(xiao)(xiao)(xiao)(xiao)減噪聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)，把吸(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)材(cai)(cai)料(liao)(liao)固定(ding)(ding)在(zai)氣(qi)(qi)流流通的(de)(de)(de)(de)管(guan)道內壁或按(an)一定(ding)(ding)方(fang)式(shi)(shi)(shi)排(pai)列在(zai)管(guan)道中(zhong)，當聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波進入(ru)消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)時，大部分聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)能被吸(xi)收，起到消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)作(zuo)用(yong)(yong)，阻(zu)(zu)性消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)優點(dian)(dian)是(shi)能在(zai)較寬的(de)(de)(de)(de)中(zhong)高(gao)頻范(fan)圍內消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)，特(te)別對高(gao)頻聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波有(you)突出的(de)(de)(de)(de)消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)作(zuo)用(yong)(yong)。缺點(dian)(dian)是(shi)在(zai)高(gao)溫水(shui)蒸氣(qi)(qi)以及對吸(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)材(cai)(cai)料(liao)(liao)有(you)侵(qin)蝕(shi)作(zuo)用(yong)(yong)的(de)(de)(de)(de)氣(qi)(qi)體(ti)中(zhong)使用(yong)(yong)壽命(ming)較短。通常(chang)用(yong)(yong)于(yu)家庭、辦公室(shi)(shi)空調機；大型風洞，噴氣(qi)(qi)發(fa)動機試車間等(deng)(deng)處。抗(kang)(kang)性消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)又(you)稱聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)學濾波器(qi)(qi)(qi)(qi)，它(ta)(ta)又(you)分為共(gong)振(zhen)式(shi)(shi)(shi)、擴張室(shi)(shi)式(shi)(shi)(shi)和(he)干涉(she)式(shi)(shi)(shi)等(deng)(deng)幾(ji)種。最簡單的(de)(de)(de)(de)擴張室(shi)(shi)式(shi)(shi)(shi)是(shi)在(zai)氣(qi)(qi)流通道管(guan)上接一段截(jie)(jie)面(mian)較大的(de)(de)(de)(de)粗(cu)管(guan)，但其(qi)終端是(shi)細管(guan)，調節擴張室(shi)(shi)（大管(guan)）的(de)(de)(de)(de)截(jie)(jie)面(mian)扣長度(du)以改變聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波的(de)(de)(de)(de)反(fan)射(she)和(he)干涉(she)性能，從而改變消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)量和(he)最大消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)頻率(lv)。它(ta)(ta)與阻(zu)(zu)性消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)不同(tong)之處在(zai)于(yu)其(qi)中(zhong)沒有(you)放置吸(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)材(cai)(cai)料(liao)(liao)，抗(kang)(kang)性消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)優點(dian)(dian)是(shi)結構簡單，耐(nai)高(gao)溫耐(nai)氣(qi)(qi)體(ti)侵(qin)蝕(shi)，有(you)良好的(de)(de)(de)(de)低頻消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)性能．缺點(dian)(dian)是(shi)消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)頻帶(dai)窄，主(zhu)要(yao)用(yong)(yong)于(yu)汽車發(fa)動機及其(qi)它(ta)(ta)活塞(sai)發(fa)動機的(de)(de)(de)(de)進氣(qi)(qi)和(he)排(pai)氣(qi)(qi)口。阻(zu)(zu)抗(kang)(kang)復合(he)(he)消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)(qi)綜合(he)(he)前(qian)兩種優點(dian)(dian)制成。在(zai)其(qi)內部既有(you)阻(zu)(zu)性吸(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)材(cai)(cai)料(liao)(liao)，又(you)有(you)共(gong)振(zhen)腔，擴張室(shi)(shi)等(deng)(deng)抗(kang)(kang)性濾波元(yuan)件，因此在(zai)較寬頻率(lv)范(fan)圍內有(you)良好消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)效果。