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255);">　　在選擇高壓防爆風(fēng)機(jī)廠家前，應(yīng)了解其生產(chǎn)和產(chǎn)品質(zhì)量情況，如生產(chǎn)的品種、規(guī)格和各種產(chǎn)品的特殊用途，新產(chǎn)品的發(fā)展和推廣情況等，還應(yīng)充分考慮環(huán)保的要求，以便擇優(yōu)選用風(fēng)機(jī)。<br style="box-sizing: border-box; margin: 0px;"/> </div><div style="box-sizing: border-box; margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "microsoft yahei"; white-space: normal; background-color: rgb(255, 255, 255);">　　高壓防爆風(fēng)機(jī)廠家產(chǎn)品主要由葉輪、機(jī)殼、電動(dòng)機(jī)等零部件組成，支架與機(jī)殼風(fēng)筒銜接。氣流軸向進(jìn)入風(fēng)機(jī)葉輪后，在旋轉(zhuǎn)葉片的流道中沿著軸線方向活動(dòng)的風(fēng)機(jī)。相對(duì)于傳統(tǒng)離心風(fēng)機(jī)，該產(chǎn)品具有流量大、體積小、壓力低的特色，用于有塵埃和腐蝕性氣體場(chǎng)合時(shí)需注意。<br style="box-sizing: border-box; margin: 0px;"/> </div><div style="box-sizing: border-box; margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "microsoft yahei"; white-space: normal; background-color: rgb(255, 255, 255);">　　今天小編要為大家介紹的是高壓防爆風(fēng)機(jī)的噪聲問題，了解了產(chǎn)生噪聲的原因才能更好的去避免它。其實(shí)噪聲主要來源于渦流噪聲、旋轉(zhuǎn)噪聲和排氣噪聲，那么噪音具體是如何產(chǎn)生的，其原理是什么？<br style="box-sizing: border-box; margin: 0px;"/> </div><div style="box-sizing: border-box; margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "microsoft yahei"; white-space: normal; background-color: rgb(255, 255, 255);">　　1、渦流噪聲又稱漩渦噪聲，它主要是由于氣流流經(jīng)吐片時(shí)，產(chǎn)生紊流附面層及旋渦與旋渦脫體。而引起葉片上壓力脈動(dòng)所形成的，渦流噪聲與工作輪圓周速度6次方成比例；因此風(fēng)機(jī)圓周速度越高，其噪聲也越大。<br style="box-sizing: border-box; margin: 0px;"/> </div><div style="box-sizing: border-box; margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "microsoft yahei"; white-space: normal; background-color: rgb(255, 255, 255);">　　2、旋轉(zhuǎn)噪聲是由于工作輪上均勻分布的葉片甩出周圍的氣體，引起周圍氣體壓力而產(chǎn)生的噪聲；旋轉(zhuǎn)噪聲與工作輪圓周速度的10次方成比例；當(dāng)氣流流過葉片時(shí)，在葉片表面形成附面層，尤其是吸力邊的附面層容易加厚，并產(chǎn)生很多旋渦。<br style="box-sizing: border-box; margin: 0px;"/> </div><div style="box-sizing: border-box; margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "microsoft yahei"; white-space: normal; background-color: rgb(255, 255, 255);">　　在風(fēng)機(jī)葉片尾處，吸力邊與壓力邊的附面層匯成所謂尾跡區(qū)；在尾跡區(qū)內(nèi)，氣流的壓力與速度都低于主氣流區(qū)的數(shù)值；因此，當(dāng)工作輪旋轉(zhuǎn)時(shí)，葉片出口區(qū)內(nèi)氣流具有很大的不均勻性。這種不均勻性氣流周期地作用于周圍氣體介質(zhì)，產(chǎn)生壓力脈動(dòng)而形成噪聲；氣流的不均勻性愈強(qiáng)，噪聲也愈大。<br style="box-sizing: border-box; margin: 0px;"/> </div><div style="box-sizing: border-box; margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "microsoft yahei"; white-space: normal; background-color: rgb(255, 255, 255);">　　3、排氣噪聲則與風(fēng)機(jī)出口與進(jìn)口管路有關(guān)；當(dāng)風(fēng)機(jī)進(jìn)口的管路是筆直無旋轉(zhuǎn)彎頭時(shí)，噪聲值較小；當(dāng)有旋轉(zhuǎn)彎頭時(shí)，噪聲略大；風(fēng)機(jī)出口也是如此，但風(fēng)機(jī)入口為密閉式進(jìn)氣，由風(fēng)機(jī)出口開敞式排氣；因此，離心風(fēng)機(jī)出口比入口的噪聲要大一些。<br style="box-sizing: border-box; margin: 0px;"/> </div><p style="text-align:center;box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "microsoft yahei"; white-space: normal; background-color: rgb(255, 255, 255);"><img src="https://img65.chem17.com/9/20220905/637979742866110148335.jpg" width="450" height="450" align="middle" alt="" style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; vertical-align: middle; max-width: 100%; max-height: 100%;"/></p><p style="box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; color: rgb(51, 51, 51); font-family: "microsoft yahei"; white-space: normal; background-color: rgb(255, 255, 255);"> </p><div style="box-sizing: border-box; margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "microsoft yahei"; white-space: normal; background-color: rgb(255, 255, 255);">　　高壓防爆風(fēng)機(jī)葉輪的前盤一般有錐形前盤、平直前盤和弧形前盤等幾種。從氣體流動(dòng)軌跡來講，采用平板前盤的葉輪是不符合氣體流動(dòng)軌跡的，在葉輪外徑處的葉片流道比葉輪內(nèi)徑處的葉片流道大得多。<br style="box-sizing: border-box; margin: 0px;"/> </div><div style="box-sizing: border-box; margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "microsoft yahei"; white-space: normal; background-color: rgb(255, 255, 255);">　　因此不但在葉片流通的氣流速度上有差異，而且在葉輪外徑處葉片流道內(nèi)的氣流不能充滿，從而產(chǎn)生渦流，消耗功率，導(dǎo)致高壓離心抽風(fēng)機(jī)效率下降。<br style="box-sizing: border-box; margin: 0px;"/> </div><div style="box-sizing: border-box; margin: 0px; padding: 0px; list-style: none; border: 0px; color: rgb(51, 51, 51); font-family: "microsoft yahei"; white-space: normal; background-color: rgb(255, 255, 255);">　　錐形前盤的氣體流動(dòng)軌跡比平板前盤的好，但葉片間流道的截面，仍不能達(dá)到各部分相等或均勻地?cái)U(kuò)散。因此，在葉片流道內(nèi)仍有漏流產(chǎn)生，而影響風(fēng)機(jī)效率。在制造商雖比平板前盤增加了工序，還是比較方便的。</div><p><br/></p></div> <div id="75tlfr3" class="inside_newsthree"> <span><a href="/article.html">返回列表</a><a 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