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id="mtcvzmk" class="detail"> <div style="color:;border-color:#fff;border-top-width:;border-bottom-width:;border-left-width:;border-right-width:;border-style:solid;background:;text-align:center;margin-bottom:;"> <h1 style="font-family:微軟雅黑;font-size:24px;color:rgba(12, 171, 69, 1);font-weight:bold;text-decoration:;text-align:center;">風(fēng)機噪聲源分析與降噪措施</h1> <div id="5hr3brt" class="con_mtit"> <span id="120c9x4" class="imt"> <span style="color:rgba(85, 85, 85, 1);font-size:14px;text-align:center;"> 發(fā)表時(shí)間：</span><span style=" font-size:14px;; ">2019-02-04</span></span> </div> </div> <div id="5oefnjo" class="two" style=" text-align: center;"> <img src="/res/100136/2019/02/04/100136-mxPCta.png" loading="lazy"> </div> <p class="articleContent"></p> <p><span style="font-family: 微軟雅黑, " microsoft yahei>風(fēng)機噪聲聲源分析</span></p> <p><span style="font-family: 微軟雅黑, " microsoft yahei>民用建筑中的新風(fēng)換風(fēng)機、餐廳排煙風(fēng)機等設備運行時(shí)輻射出的噪聲對周?chē)穆暛h(huán)境造成了不良影響；風(fēng)機噪聲一般包括空氣噪聲輻射和結構噪聲傳導。</span></p> <p><span style="font-family: 微軟雅黑, " microsoft yahei>空氣聲</span></p> <p><span style="font-family: 微軟雅黑, " microsoft yahei>風(fēng)機噪聲包括空氣動(dòng)力性噪聲、機械噪聲和電磁噪聲，其中空氣動(dòng)力性噪聲約比其它噪聲高出10～20dB(A)?？諝鈩?dòng)力性噪聲是由于氣體非穩定流動(dòng)，即氣流的擾動(dòng)，氣體與氣體及氣體與物體相互作用產(chǎn)生的噪聲。從噪聲產(chǎn)生的機理來(lái)看，它主要由兩部分組成，即旋轉噪聲和渦流噪聲。</span></p> <p><span style="font-family: 微軟雅黑, " microsoft yahei>? ? 風(fēng)機振動(dòng)</span></p> <p><span style="font-family: 微軟雅黑, " microsoft yahei>風(fēng)機屬于旋轉運動(dòng)機器，由于旋轉部件的質(zhì)量分布不均勻，旋轉部件的質(zhì)心與轉動(dòng)中心存在著(zhù)偏心距，從而產(chǎn)生擾力，擾力會(huì )激勵風(fēng)機振動(dòng)，其振動(dòng)可以通過(guò)機組的基礎、管道及管道的支、吊架傳遞至建筑結構，并經(jīng)建筑結構傳遞出去，迫使建筑結構或建筑結構上的附著(zhù)物振動(dòng)發(fā)聲，輻射空氣聲，即結構噪聲。</span></p> <p><span style="font-family: 微軟雅黑, " microsoft yahei>結構噪聲屬于固體傳聲，噪聲級隨傳播距離的衰減很小，在以鋼筋混凝土結構為主的現代高層建筑中，風(fēng)機或其它產(chǎn)生振動(dòng)設備的結構噪聲可影響該建筑的數個(gè)樓層，是室內噪聲超標的主要噪聲源之一。</span></p> <p><span style="font-family: 微軟雅黑, " microsoft yahei>降噪措施</span></p> <p><span style="font-family: 微軟雅黑, " microsoft yahei>風(fēng)機作隔聲處理，安裝風(fēng)機隔聲箱或對風(fēng)機房進(jìn)行吸聲隔聲處理，如必要可為風(fēng)機電機配套通風(fēng)消聲器；</span></p> <p><span style="font-family: 微軟雅黑, " microsoft yahei>風(fēng)機進(jìn)排風(fēng)口位置安裝消聲器，降低經(jīng)風(fēng)管向外輻射的噪聲；還可對風(fēng)管進(jìn)行阻尼包扎，提高管道隔音性能；</span></p> <p><span style="font-family: 微軟雅黑, " microsoft yahei>若風(fēng)機安裝在室內風(fēng)機房里且鄰近房間受到低頻聲的侵擾，還需要對風(fēng)機機體、風(fēng)管及兩者連接處分別作隔振避振處理；</span></p> <p><br></p> <div id="x4y1qpy" class="bdsharebuttonbox"> <span style="float:left;margin-top: 9px;"> 分享到：</span> <div class="mktv1nm" id="share-2"></div> </div> <div id="qtefj55" class="next"> <p> <span> 上一篇 </span> <a href="/news/1159.html"><span>濾筒除塵器過(guò)濾風(fēng)速取多大合適？</span> </a> </p> <p> <span> 下一篇 </span> <a href="/news/1157.html"><span>鍋爐噪聲聲源分析</span> </a> </p> </div> </div> </div> </div> </div> </div> </div> </div> <div class="6gxrivb" id="k9mglmqvscw0000000" 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