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</div><div>　　工業不銹鋼離心風機噪聲中，進、出氣口輻射的空氣動力性噪聲大，所以首先要將這局部噪聲降下去。在環保離心風機進、出口裝置消聲器是抑止通風機噪聲的有效措施。目前應用消聲器品種繁多，主要以阻性和抗性為根本類型，而通風機普通多采用阻性消聲器，一般的阻性消聲器有管式.蜂窩式、片式和折板式消聲器。</div><div> </div><div>　　離心風機葉輪葉柵氣流產生的循環性脈動氣動力，使蝸舌互相作用產生旋轉噪聲，此噪聲大小與脈動氣動力的猛烈水平及蝸舌的頂風面積有關，可以嘗試蝸舌制作成傾斜式，則同相位的脈動氣動力作用面積小了，輻射的噪聲也就小了。</div><div> </div><div>　　離心風機的葉輪葉片排風口的尺寸通常大于前盤處進風口的尺寸，所以氣流在風機中活動時，將在進風口圓弧段部位產生許多渦流，構成空氣動力噪聲?？稍陲L機進風口處位于風機蝸殼內部的外圍處增設整流圈及擋板，就能有效避免氣流在風機進口處構成渦流，從而降低離心風機所產生的空氣動力噪聲。</div><div> </div><div>　　前傾是和葉輪邊緣平行，葉輪出口角大于90度為前傾葉輪也稱為前傾葉輪，前傾葉輪以高壓的居多。而后傾和葉輪不平行，長度到葉輪邊緣相差幾公分或是幾毫米，指葉輪出口角小于90度為后傾葉輪也稱為后傾葉輪，后傾葉輪主要以中壓的為主。</div></div> <div class="ye">上一篇：<a href="/News-556717.html">不好好維護尾氣引風機會引起哪些后果？</a> 下一篇：<a href="/News-551676.html">專業危廢離心風機與危廢的處理</a></div> </div>  </div>  </div> </div> </article> </div> <div class="clear"></div> </section>   <div class="footer"> <div class="footer_in"> <div class="info clearfix"> <ul> <li><a href="/">首頁</a></li> <li>|</li> <li><a href="/aboutus.html" rel="nofollow">關于我們</a></li> <li>|</li> <li><a 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