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href='http://www.0622799.com' target='_blank'>www.0622799.com</a> 發布時間：2020-05-19</span> <a href="javascript:history.go(-1)" class="back">返回列表</a> </div> <div class="ar_con"> <p> <span style="font-size:14px;line-height:2;"> 3C排煙風機是排煙風機的一種特殊的類型，具有具有性能優良,耐高溫性能良好、效率高、占地比離心風機少、安裝方便等特點，因此受到很多行業的普遍選擇。但是我們在使用一段時間以后就會發現，3C排煙風機會莫名其妙的出現噪音問題，</span><a href="/" target="_blank"><span style="font-size:14px;line-height:2;">貴州風機廠</span></a><span style="font-size:14px;line-height:2;">為你分析</span><span style="font-size:14px;line-height:2;">　</span> </p> <p> <span style="font-size:14px;line-height:2;">當3C排煙風機的葉片較薄以及過度前掠,重心偏離葉根截面中心時,較高轉速造成的離心力和不穩定進氣流造成的葉片升力的變化,很容易激發葉片振動。同時由于流固耦合,還可能造成3C排煙風機的葉片的馳振,使葉片提前疲勞損壞,降低風機效率,并產生較大的氣動噪聲?！　?/span> </p> <p> <span style="font-size:14px;line-height:2;">其次還和3C排煙風機的葉片振型頻率有關系。葉片低頻振型主要以葉片整體扭擺為主,而高頻主要以葉片彎曲波為主。從對噪聲的影響來看認為前六階振型影響較大,因為由于它的擺動對流場有較大影響,造成了葉片進氣攻角的變化,從而形成葉片表面升力的波動,最嚴重的情況會產生馳振,產生很大氣動噪聲和效率較大的降低。</span> </p> <p> </p> </div> <div class="record"> <span 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