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影響變頻器散熱軸流風機使用壽命的＂秘密＂你

發(fā)布時間：2022-10-10 點擊次數(shù)： 2507

　　壽命是變頻器散熱軸流風機在長期使用中不得不關注的一項指標。壽命即散熱軸流風機可以無故障使用的時間，單位一般為小時。我們花費金錢購買的軸流風機，自然希望它的正常工作時間越長越好，至少也要在使用期內(nèi)正常工作。

　　變頻器散熱軸流風機的壽命長短主要取決于軸承壽命、定子繞組線圈壽命、電子組件壽命三者。軸承壽命根據(jù)不同的設計類型與工作強度，在1000～300000小時之間。定子繞組線圈壽命在正常環(huán)境中使用一般可達幾十萬，甚至幾百萬小時以上；環(huán)境惡劣，如高溫、低溫、溫差大、濕度大等，則可能大幅縮短。電子組件壽命較定子繞組線圈壽命更長，但易受環(huán)境溫度影響，尤其高溫可大幅度縮短電子組件壽命。根據(jù)眾所周知的擋水板（或瓶頸）原理，散熱軸流風機的壽命決定于三者中最短的軸承壽命。風扇的使用壽命還會受到工作負荷的影響：轉(zhuǎn)速越高的風扇，其軸承磨損也就越快，定子繞組線圈與電子組件發(fā)熱也就越多，壽命必然縮短。這正是在并沒有靜音需求的服務器電源領域廣泛采用溫控風扇的原因——合理減輕風扇工作負荷，延長使用壽命。

　　除了變頻器散熱軸流風機本身設計、選材的基本決定因素外，使用環(huán)境也會對風扇壽命造成重要影響。高溫會加快含油軸承中潤滑液的揮發(fā)，令器件膨脹增加摩擦，令線圈電阻增大，陷入發(fā)熱增加溫度升高的惡性循環(huán)，加快電子組件老化。劇烈的溫度變化會令器件發(fā)生形變，令線圈劇烈收縮而崩斷，令半導體組件工作點漂移?；覊m會令扇葉質(zhì)量分布改變，增加摩擦，增大風阻，影響自身散熱，阻礙散熱片與空氣進行熱交換，產(chǎn)生靜電放電損壞組件與設備。惡劣的使用環(huán)境可能令風扇的效果大打折扣，且壽命大減。

　　為變頻器搭配軸流風機時，可參考預期使用時間（年數(shù)、天數(shù)等）與工作強度（每日工作時間）選擇足夠“長壽”的產(chǎn)品。下例粗略估算一下：正常環(huán)境下，一款壽命為10000小時的風扇，作為計算機散熱系統(tǒng)的組成部分，每天隨計算機工作10小時，可無故障使用1000天，即接近3年時間，基本可以滿足需要。如果開機后持續(xù)運行（服務器等使用環(huán)境），則可無故障使用約417天，不足14個月，顯然不是理想的選擇，而應根據(jù)服務器預期使用時間，選擇壽命更長的產(chǎn)品，比如大于40000小時的。此外，應根據(jù)環(huán)境條件適當“打折”。如前例中壽命10000小時的風扇如果在灰塵較大的環(huán)境使用，就應改折損為6000小時左右。故實際應選擇壽命為15000小時以上的產(chǎn)品。

上一篇：機柜散熱軸流風機不同尺寸之間轉(zhuǎn)速的＂秘密＂

下一篇：工業(yè)散熱軸流風機廠家揭秘軸流風機噪音的3個來

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