1，引(yin)言(yan)
由于羅茨鼓風機周期性地吸、排氣以及瞬 時等容壓縮而形成的氣流速度與壓力脈動，從 而產生了很大的氣體動力噪聲和振動幅射噪 聲，給生產和安全都帶來不利影響。章丘豐源機械有限公司針對羅茨風機的噪聲特性，采用先進的 噪聲控制技術和降噪設計，有效地降低羅茨鼓 風機及其管道系統的噪聲污染，滿足人們日益 增強的健康要求。

2，羅茨鼓(gu)風機的(de)噪聲特(te)性
羅茨鼓風機實際上是一種容積式氣體增壓 與輸送機械，運轉時產生噪聲的原因主要有： 2.1，氣體在管道輸送過程中由于管道橫 截面積變化所引起的氣流脈動噪聲。 2.2，風機葉輪在轉動過程中由于容積空 間變化將產生壓力脈動，從而引起流量脈動噪 聲。 2.3，進氣口面積突變所導致的高低壓氣 體撞擊所引起的氣流脈動噪聲。 2.4，高速氣體與葉輪和殼體的接觸噪 聲。 2.5，齒輪嚙合過程中由于齒型誤差所引 起的振動噪聲。 2.6，因軸承制造精度差所引起的噪聲。 2.7，葉輪由于受力不均引起的軸承振動 噪聲。 2.8，葉輪嚙合過程由于轉子制造誤差所 引起的撞擊噪聲。 其中，以氣流噪聲強度最高，危害最大。 氣流噪聲按產生機理分析，主要有兩種形式： 一種是風機葉片負荷和厚度引起的旋轉噪聲； 另一種是風機葉片附面層分離、旋渦發放、紊 流脈動等引起的渦流噪聲。旋轉噪聲是由于風 機葉片工作于非粘性的勢流中產生的，其頻譜 常呈低中頻性，伴有一組離散的頻率尖峰；而 渦流噪聲則取決于風機葉輪的形狀以及氣流相 對于機體的流速及流體粘性，產生連續頻譜的 高頻噪聲。頻率越高，噪聲指向性越強。 不同的風機參數，有著不同的頻譜。風機 噪聲頻譜特性：<500hz 1000hz="">1000Hz 為高頻噪聲。羅 茨鼓風機有復雜而連續的頻譜成份。首先在很 寬的頻率范圍內均有較高的噪聲，其中以低中 頻為主要成份，且盡管風機型號不同，其噪 聲頻譜特性都基本相似。其次當靜壓較低即負 載較小時，峰值頻率常在125Hz 左右，當升 壓至額定靜壓條件下運轉時，在中頻500Hz 以 上，還會出現新的噪聲峰值。說明隨著羅茨 鼓風機工作壓力的提高，中高頻噪聲將會出現 明顯的增大。 羅茨鼓風機的噪聲強度及頻譜特性既與風 機的工作靜壓大小有關，又與風機的流量、轉 速有關。如隨著流量的增大，噪聲也相應升 高，其中中高頻噪聲的增大尤為顯著。

3.噪(zao)音控(kong)制(zhi)技術(shu)。
根據使用(yong)(yong)(yong)(yong)(yong)現(xian)場的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)實(shi)際情況，應用(yong)(yong)(yong)(yong)(yong)頻(pin)(pin)(pin)(pin)譜分(fen)(fen)析 明(ming)確風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)部位(wei)，這不(bu)僅使風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)測 量(liang)和(he)(he)調(diao)查能(neng)夠做到(dao)有的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)放矢(shi)，而(er)(er)且為(wei)(wei)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)控制 設(she)備和(he)(he)治理(li)(li)(li)工程的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)設(she)計提(ti)供了(le)(le)科學的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)依據。經 過長期的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)從(cong)設(she)計到(dao)實(shi)踐的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)反(fan)復(fu)論證，證明(ming)以下 技術(shu)(shu)對控制羅(luo)茨(ci)鼓(gu)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)污染(ran)是(shi)十分(fen)(fen)有效(xiao)(xiao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)。 3.1，降(jiang)低(di)(di)(di)(di)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)空氣(qi)(qi)動(dong)(dong)(dong)力噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)方法(fa) 3.1.1，合理(li)(li)(li)選(xuan)(xuan)擇風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)形(xing)式：同(tong)一(yi)(yi)(yi)系(xi)列的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)風(feng)(feng)(feng)(feng)(feng)(feng) 機(ji)(ji)(ji)(ji)風(feng)(feng)(feng)(feng)(feng)(feng)量(liang)、風(feng)(feng)(feng)(feng)(feng)(feng)壓(ya)(ya)大(da)(da)者，噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)也大(da)(da)。因此，選(xuan)(xuan)擇機(ji)(ji)(ji)(ji)號(hao) 時，余量(liang)過大(da)(da)不(bu)僅浪費電(dian)能(neng)，而(er)(er)且還增大(da)(da)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)， 風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)性(xing)(xing)能(neng)必須(xu)與管(guan)(guan)(guan)網及(ji)運行(xing)制度(du)相匹配方能(neng) 得(de)到(dao)最低(di)(di)(di)(di)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)。對同(tong)一(yi)(yi)(yi)型號(hao)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)，在(zai)(zai)(zai)性(xing)(xing)能(neng)允許 條(tiao)(tiao)件下，應盡(jin)量(liang)選(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong)低(di)(di)(di)(di)轉速(su)運行(xing)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)，當(dang)(dang)達到(dao) 一(yi)(yi)(yi)定流量(liang)盡(jin)量(liang)減(jian)少轉速(su)，以降(jiang)低(di)(di)(di)(di)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)。 3.1.2，合理(li)(li)(li)地設(she)計管(guan)(guan)(guan)路：管(guan)(guan)(guan)路阻力要(yao)小(xiao)，風(feng)(feng)(feng)(feng)(feng)(feng) 機(ji)(ji)(ji)(ji)入口(kou)不(bu)宜處(chu)于急變流場，若(ruo)系(xi)統(tong)中(zhong)(zhong)(zhong)有多(duo)個(ge)管(guan)(guan)(guan) 件，如彎(wan)頭(tou)(tou)、支管(guan)(guan)(guan)等，則它(ta)們之間(jian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)距(ju)(ju)離(li)應拉開(kai) 5～10 倍管(guan)(guan)(guan)徑(jing)。 采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)合理(li)(li)(li)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)調(diao)節方式，并(bing)使風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)入口(kou)均勻 進氣(qi)(qi)，都會使噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)下降(jiang)。另外，應防止(zhi)機(ji)(ji)(ji)(ji)殼與管(guan)(guan)(guan) 道(dao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)振動(dong)(dong)(dong)過大(da)(da)而(er)(er)輻(fu)(fu)射(she)(she)過大(da)(da)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)。用(yong)(yong)(yong)(yong)(yong)加(jia)強肋(lei)板(ban) 和(he)(he)阻尼涂層使薄(bo)板(ban)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)固(gu)有頻(pin)(pin)(pin)(pin)率(lv)(lv)(lv)提(ti)高(gao)(gao)。圓形(xing)管(guan)(guan)(guan)道(dao) 的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)振動(dong)(dong)(dong)以及(ji)振動(dong)(dong)(dong)產生的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)輻(fu)(fu)射(she)(she)量(liang)較(jiao)(jiao)矩形(xing)管(guan)(guan)(guan)道(dao) 為(wei)(wei)小(xiao)，要(yao)盡(jin)量(liang)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)圓形(xing)管(guan)(guan)(guan)道(dao)。 3.1.3，吸(xi)(xi)(xi)(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)材(cai)(cai)料(liao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)分(fen)(fen)類(lei)與應用(yong)(yong)(yong)(yong)(yong) 一(yi)(yi)(yi)般多(duo)采(cai)(cai)用(yong)(yong)(yong)(yong)(yong) 125、250、500、1000、2000、 4000Hz 六個(ge)頻(pin)(pin)(pin)(pin)率(lv)(lv)(lv)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)吸(xi)(xi)(xi)(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)系(xi)數，其算(suan)術(shu)(shu)平均值 α>0.2時的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)材(cai)(cai)料(liao)才能(neng)作吸(xi)(xi)(xi)(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)材(cai)(cai)料(liao)。多(duo)孔(kong)材(cai)(cai)料(liao)主(zhu) 要(yao)吸(xi)(xi)(xi)(xi)收(shou)中(zhong)(zhong)(zhong)、高(gao)(gao)頻(pin)(pin)(pin)(pin)；板(ban)狀(zhuang)和(he)(he)膜狀(zhuang)材(cai)(cai)料(liao)主(zhu)要(yao)吸(xi)(xi)(xi)(xi)收(shou)低(di)(di)(di)(di) 頻(pin)(pin)(pin)(pin)。在(zai)(zai)(zai)吸(xi)(xi)(xi)(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)頻(pin)(pin)(pin)(pin)率(lv)(lv)(lv)上(shang)有明(ming)顯(xian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)峰，穿(chuan)孔(kong)板(ban)吸(xi)(xi)(xi)(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)結(jie)構(gou) 則兼有上(shang)述兩類(lei)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)吸(xi)(xi)(xi)(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)特性(xing)(xing)，即在(zai)(zai)(zai)轉變的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)頻(pin)(pin)(pin)(pin)率(lv)(lv)(lv) 范圍內(nei)(nei)有相當(dang)(dang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)吸(xi)(xi)(xi)(xi)收(shou)。 3.2，消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)種類(lei)與選(xuan)(xuan)取(qu)原則 消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)僅對進排(pai)氣(qi)(qi)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)有明(ming)顯(xian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)效(xiao)(xiao)果(guo)。風(feng)(feng)(feng)(feng)(feng)(feng) 機(ji)(ji)(ji)(ji)進、排(pai)氣(qi)(qi)管(guan)(guan)(guan)路常用(yong)(yong)(yong)(yong)(yong)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)配套系(xi)列消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)有：阻性(xing)(xing) 消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)（中(zhong)(zhong)(zhong)高(gao)(gao)頻(pin)(pin)(pin)(pin)效(xiao)(xiao)果(guo)好）、 抗性(xing)(xing)消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)（中(zhong)(zhong)(zhong)低(di)(di)(di)(di)頻(pin)(pin)(pin)(pin) 效(xiao)(xiao)果(guo)好）、 微穿(chuan)孔(kong)板(ban)消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)（較(jiao)(jiao)好的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)低(di)(di)(di)(di)中(zhong)(zhong)(zhong)頻(pin)(pin)(pin)(pin)寬(kuan)帶(dai) 消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)）、 阻抗復(fu)變消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)（消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)值高(gao)(gao)，頻(pin)(pin)(pin)(pin)帶(dai)寬(kuan)）及(ji) 組合型專用(yong)(yong)(yong)(yong)(yong)消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)。 根據風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)級大(da)(da)小(xiao)、頻(pin)(pin)(pin)(pin)譜特性(xing)(xing)及(ji)使用(yong)(yong)(yong)(yong)(yong) 流量(liang)，由(you)具體的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)工藝條(tiao)(tiao)件決定消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)設(she)置(zhi)。選(xuan)(xuan) 取(qu)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)原則是(shi)在(zai)(zai)(zai)上(shang)、下限截止(zhi)頻(pin)(pin)(pin)(pin)率(lv)(lv)(lv)（4000Hz～ 250Hz）之間(jian)，合理(li)(li)(li)選(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong)消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)值高(gao)(gao)，節省費用(yong)(yong)(yong)(yong)(yong)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de) 消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)。 3.3，控制噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)方法(fa) 3.3.1，隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)與吸(xi)(xi)(xi)(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)處(chu)理(li)(li)(li) 為(wei)(wei)了(le)(le)隔(ge)(ge)絕鼓(gu)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)基礎(chu)振動(dong)(dong)(dong)，減(jian)弱固(gu)體聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng) 的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)傳遞，可在(zai)(zai)(zai)鼓(gu)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)下安裝減(jian)振器(qi)(qi)(qi)，或(huo)在(zai)(zai)(zai)設(she)計門的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)隔(ge)(ge)振基礎(chu)。采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)全封閉的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)間(jian)，在(zai)(zai)(zai)隔(ge)(ge) 聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)間(jian)內(nei)(nei)墻面和(he)(he)平頂(ding)表面襯上(shang) 60mm 厚(hou)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)微孔(kong)泡 沫塑料(liao)；風(feng)(feng)(feng)(feng)(feng)(feng)道(dao)與墻壁(bi)(bi)間(jian)隙(xi)充(chong)填(tian)毛氈(zhan)，以吸(xi)(xi)(xi)(xi)收(shou)羅(luo)茨(ci) 鼓(gu)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)輻(fu)(fu)射(she)(she)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)。采(cai)(cai)用(yong)(yong)(yong)(yong)(yong)自扇通風(feng)(feng)(feng)(feng)(feng)(feng)冷(leng)(leng)卻(que)、負壓(ya)(ya)吸(xi)(xi)(xi)(xi) 風(feng)(feng)(feng)(feng)(feng)(feng)冷(leng)(leng)卻(que)、空氣(qi)(qi)循環通風(feng)(feng)(feng)(feng)(feng)(feng)冷(leng)(leng)卻(que)、外加(jia)機(ji)(ji)(ji)(ji)械通風(feng)(feng)(feng)(feng)(feng)(feng)冷(leng)(leng)卻(que) 等措施(shi)，有效(xiao)(xiao)地解決隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)間(jian)內(nei)(nei)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)通風(feng)(feng)(feng)(feng)(feng)(feng)散(san)熱問題。 一(yi)(yi)(yi)般可降(jiang)低(di)(di)(di)(di)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng) 8～12dB(A)。設(she)置(zhi)雙層 6mm 厚(hou)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)密(mi)封玻璃窗直(zhi)接觀察風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)運轉情況。選(xuan)(xuan)用(yong)(yong)(yong)(yong)(yong) 能(neng)實(shi)時顯(xian)示風(feng)(feng)(feng)(feng)(feng)(feng)壓(ya)(ya)、溫度(du)、電(dian)動(dong)(dong)(dong)機(ji)(ji)(ji)(ji)電(dian)流等工作狀(zhuang)況 和(he)(he)具啟動(dong)(dong)(dong)、停止(zhi)、故障報警(jing)等功能(neng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)遠距(ju)(ju)離(li)機(ji)(ji)(ji)(ji)電(dian) 一(yi)(yi)(yi)體化(hua)智能(neng)自動(dong)(dong)(dong)控制系(xi)統(tong)，實(shi)現(xian)人機(ji)(ji)(ji)(ji)分(fen)(fen)離(li)。 3.3.2，輸氣(qi)(qi)管(guan)(guan)(guan)道(dao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)阻尼和(he)(he)隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)處(chu)理(li)(li)(li) 羅(luo)茨(ci)鼓(gu)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)進氣(qi)(qi)或(huo)排(pai)氣(qi)(qi)管(guan)(guan)(guan)道(dao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)阻尼與隔(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng) 處(chu)理(li)(li)(li)，也是(shi)降(jiang)低(di)(di)(di)(di)風(feng)(feng)(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)一(yi)(yi)(yi)個(ge)重要(yao)環節。輸 氣(qi)(qi)管(guan)(guan)(guan)道(dao)采(cai)(cai)取(qu)阻尼措施(shi)，先用(yong)(yong)(yong)(yong)(yong)瀝青(qing)、毛氈(zhan)等阻 尼材(cai)(cai)料(liao)緊敷于管(guan)(guan)(guan)壁(bi)(bi)外，以阻尼管(guan)(guan)(guan)壁(bi)(bi)振動(dong)(dong)(dong)，降(jiang) 低(di)(di)(di)(di)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)輻(fu)(fu)射(she)(she)。然(ran)后用(yong)(yong)(yong)(yong)(yong)玻璃棉等材(cai)(cai)料(liao)做一(yi)(yi)(yi)層吸(xi)(xi)(xi)(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng) 層，再用(yong)(yong)(yong)(yong)(yong)鋼絲(si)網水泥做2cm 左右的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)刷(shua)層，可 降(jiang)低(di)(di)(di)(di)管(guan)(guan)(guan)壁(bi)(bi)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)15～20dB(A)。必要(yao)時設(she)置(zhi)消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng) 彎(wan)頭(tou)(tou)為(wei)(wei)雙層壁(bi)(bi)結(jie)構(gou)，內(nei)(nei)壁(bi)(bi)按設(she)計距(ju)(ju)離(li)鉆直(zhi)徑(jing) 1mm 孔(kong)多(duo)個(ge)，內(nei)(nei)外壁(bi)(bi)間(jian)距(ju)(ju)為(wei)(wei)100mm，其間(jian)充(chong) 填(tian)細玻璃棉以吸(xi)(xi)(xi)(xi)收(shou)由(you)風(feng)(feng)(feng)(feng)(feng)(feng)速(su)而(er)(er)產生的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)，從(cong)而(er)(er) 降(jiang)低(di)(di)(di)(di)排(pai)風(feng)(feng)(feng)(feng)(feng)(feng)系(xi)統(tong)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)。
4，降噪設計
降噪(zao)的方(fang)法主要有兩種。一種是使用消(xiao)聲 器或(huo)隔離罩，即(ji)被動降噪(zao)。

另一種是主動降噪， 從鼓風機的內部結構著手，利用空氣動力學原 理，通過研究轉子型線、進排氣管道和進排 氣口的形狀、葉輪間的間隙等與噪聲間的關 系，從而設計出低成本、低噪聲、高效節能、 結構緊湊的羅茨鼓風機。FSR系列羅茨鼓風機的(de)(de)(de)(de)降(jiang)噪(zao)(zao)(zao)(zao)設計(ji)要點 如下(xia)： 4.1，葉(xie)(xie)(xie)輪(lun)采取(qu)特殊降(jiang)噪(zao)(zao)(zao)(zao)圓(yuan)(yuan)弧、擺線(xian)、圓(yuan)(yuan) 弧組合(he)(he)型(xing)線(xian)，容(rong)積利用(yong)率為 0.53，降(jiang)低(di)由流(liu) 量(liang)和(he)壓(ya)力脈動所引(yin)起的(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)3～4dB(A)。主(zhu)要 降(jiang)低(di)了(le)(le)渦流(liu)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)的(de)(de)(de)(de)中(zhong)、高頻(pin)(pin)部分(fen)。 4.2，機(ji)(ji)(ji)殼采取(qu)了(le)(le)逆(ni)(ni)流(liu)冷(leng)(leng)卻技術的(de)(de)(de)(de)降(jiang)噪(zao)(zao)(zao)(zao)結(jie)(jie)構， 使(shi)沖(chong)擊(ji)波強(qiang)度(du)減(jian)(jian)弱 50%，噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)大約降(jiang)低(di)5dB(A)。 主(zhu)要降(jiang)低(di)了(le)(le)旋(xuan)轉噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)的(de)(de)(de)(de)低(di)頻(pin)(pin)部分(fen)。進(jin)出風(feng)(feng)口(kou)設 計(ji)成(cheng) 20 度(du)的(de)(de)(de)(de)螺旋(xuan)漸(jian)變斜口(kou)，避免進(jin)排氣(qi)(qi)口(kou)面積 突(tu)變，削減(jian)(jian)周(zhou)(zhou)期性排氣(qi)(qi)沖(chong)擊(ji)的(de)(de)(de)(de)氣(qi)(qi)流(liu)脈動噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)。 4.3，葉(xie)(xie)(xie)輪(lun)組采用(yong)了(le)(le)整體結(jie)(jie)構；去掉了(le)(le)軸(zhou)承 座(zuo)，進(jin)口(kou)軸(zhou)承直接裝(zhuang)在(zai)(zai)帶有階梯孔(kong)的(de)(de)(de)(de)墻(qiang)(qiang)板上(shang)；機(ji)(ji)(ji) 殼與(yu)墻(qiang)(qiang)板用(yong)圓(yuan)(yuan)柱銷(xiao)定位，保證(zheng)了(le)(le)同軸(zhou)度(du)。5 級精 度(du)的(de)(de)(de)(de)硬齒(chi)面直齒(chi)輪(lun)（斜齒(chi)輪(lun)）與(yu)傳動軸(zhou)采用(yong)脹緊 套聯接，潤(run)滑(hua)油選用(yong) N68～N220號中(zhong)極壓(ya)工(gong)(gong)業 齒(chi)輪(lun)油；主(zhu)、副油箱材(cai)質為鑄鋁(lv)等多項新結(jie)(jie)構。主(zhu)要零部件均(jun)(jun)采用(yong)數控設備和(he)加工(gong)(gong)中(zhong)心(xin) 加工(gong)(gong)，在(zai)(zai)整個頻(pin)(pin)譜特性上(shang)取(qu)得良好的(de)(de)(de)(de)降(jiang) 噪(zao)(zao)(zao)(zao)效(xiao)(xiao)果(guo)(guo)。 4.4，設計(ji)合(he)(he)理(li)的(de)(de)(de)(de)承載、密(mi)封、潤(run)滑(hua) 等結(jie)(jie)構形式，達到結(jie)(jie)構緊湊、密(mi)集組合(he)(he)成(cheng) 套、免維護(hu)等要求。 4.5，建立鼓(gu)風(feng)(feng)機(ji)(ji)(ji)專用(yong)試驗(yan)臺，測(ce)(ce)試 風(feng)(feng)機(ji)(ji)(ji)的(de)(de)(de)(de)風(feng)(feng)量(liang)脈動率、全壓(ya)、容(rong)積效(xiao)(xiao)率、噪(zao)(zao)(zao)(zao) 聲(sheng)(sheng)(sheng)等主(zhu)要性能(neng)指標。 4.5.1，為了(le)(le)評估(gu)理(li)論分(fen)析的(de)(de)(de)(de)正(zheng)確性， 對(dui)采用(yong)逆(ni)(ni)流(liu)冷(leng)(leng)卻技術和(he)不采用(yong)逆(ni)(ni)流(liu)冷(leng)(leng)卻 技術的(de)(de)(de)(de)兩種情(qing)況(kuang)進(jin)行了(le)(le)對(dui)比試驗(yan)。在(zai)(zai) FSL45WC 三葉(xie)(xie)(xie)羅茨(ci)(ci)(ci)(ci)鼓(gu)風(feng)(feng)機(ji)(ji)(ji)進(jin)口(kou)處(chu)未裝(zhuang)有 消聲(sheng)(sheng)(sheng)器的(de)(de)(de)(de)條件下(xia)，離機(ji)(ji)(ji)側 1 米處(chu)分(fen)別對(dui)接 通(tong)(tong)氣(qi)(qi)體逆(ni)(ni)流(liu)冷(leng)(leng)卻通(tong)(tong)道(dao)(dao)和(he)關閉氣(qi)(qi)體逆(ni)(ni)流(liu)冷(leng)(leng) 卻通(tong)(tong)道(dao)(dao)兩種情(qing)況(kuang)進(jin)行了(le)(le)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)測(ce)(ce)量(liang)，其(qi)數 據列(lie)于(yu)表 1，可(ke)以看出在(zai)(zai)相同升壓(ya)下(xia)，接 通(tong)(tong)氣(qi)(qi)體逆(ni)(ni)流(liu)冷(leng)(leng)卻通(tong)(tong)道(dao)(dao)比關閉氣(qi)(qi)體逆(ni)(ni)流(liu)冷(leng)(leng) 卻通(tong)(tong)道(dao)(dao)的(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)低(di)。 4.5.2，用(yong)扭(niu)(niu)葉(xie)(xie)(xie)轉子(zi)代替直葉(xie)(xie)(xie)轉子(zi)用(yong) 于(yu)羅茨(ci)(ci)(ci)(ci)鼓(gu)風(feng)(feng)機(ji)(ji)(ji)的(de)(de)(de)(de)低(di)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)結(jie)(jie)構設計(ji)。測(ce)(ce)試 用(yong)三葉(xie)(xie)(xie)羅茨(ci)(ci)(ci)(ci)鼓(gu)風(feng)(feng)機(ji)(ji)(ji)主(zhu)參數：理(li)論流(liu)量(liang) 45m3/min，額(e)定升壓(ya) 58.8kPa，額(e)定 轉速 1580r/min，葉(xie)(xie)(xie)輪(lun)直徑 305，長(chang) 450， 扭(niu)(niu)葉(xie)(xie)(xie)轉角 60°。吸排氣(qi)(qi)口(kou)均(jun)(jun)安裝(zhuang)了(le)(le)消聲(sheng)(sheng)(sheng) 器，測(ce)(ce)試現場(chang)的(de)(de)(de)(de)背景(jing)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)為 45dB(A)。扭(niu)(niu) 葉(xie)(xie)(xie)羅茨(ci)(ci)(ci)(ci)鼓(gu)風(feng)(feng)機(ji)(ji)(ji)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)測(ce)(ce)量(liang)結(jie)(jie)果(guo)(guo)見下(xia)表。 升壓(ya)(kPa)???? 9.8 19.6 29.4 39.2 49.0 58.8 噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)值(zhi)dB(A) 79.8 85.1 85.8 87.7 89.2 89.7 上(shang)述噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)值(zhi)為離風(feng)(feng)機(ji)(ji)(ji)周(zhou)(zhou)圍 1 米處(chu)測(ce)(ce) 得。底座(zuo)（基礎(chu)）或(huo)管(guan)(guan)道(dao)(dao)狀況(kuang)不同，所測(ce)(ce) 出的(de)(de)(de)(de)噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)值(zhi)不同。如加隔聲(sheng)(sheng)(sheng)罩后噪(zao)(zao)(zao)(zao)聲(sheng)(sheng)(sheng)可(ke) 在(zai)(zai)此基礎(chu)上(shang)降(jiang)低(di) 20dB(A)左右。羅茨(ci)(ci)(ci)(ci)鼓(gu)風(feng)(feng) 機(ji)(ji)(ji)及其(qi)管(guan)(guan)道(dao)(dao)系統可(ke)降(jiang)至 85dB(A)以下(xia)，風(feng)(feng) 機(ji)(ji)(ji)在(zai)(zai)降(jiang)噪(zao)(zao)(zao)(zao)設計(ji)及性能(neng)上(shang)均(jun)(jun)取(qu)得良好的(de)(de)(de)(de)效(xiao)(xiao) 果(guo)(guo)。

5，結束語

降低噪聲最有效最經濟的方法是采 用主動降噪的新設計、新工藝來降低聲 源輻射噪聲；通過頻譜分析風機噪聲特 性，采用先進的噪聲控制技術的工藝流 程，達到降低噪聲或隔離噪聲的目的。經 過采用以上措施，羅茨鼓風機及其管道 系統的噪聲得到有效的控制。在降低噪 聲污染的同時，滿足環境治理的要求。章丘豐源憑借二十多年羅茨風機專業經驗已經積累了無數經驗，想獲取更多關于羅茨風機的方案與羅茨風機選型可以聯系電話：