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由于風(fēng)機(jī)生產(chǎn)廠家一般只對葉輪在動平衡機(jī)上進(jìn)行單體衡。組裝風(fēng)機(jī)整機(jī)振動常會出現(xiàn)超標(biāo)現(xiàn)象，引起這種超標(biāo)現(xiàn)象的原因大致有：裝配誤差、焊接葉輪在焊縫處應(yīng)力釋放產(chǎn)生不均勾的變、不均勻磨損、葉輪上污垢堆積等。<br /> 　目前運(yùn)行中的風(fēng)機(jī)，一旦發(fā)生由上述原因引起的不平衡振動故障，常常需要將葉輪拆下，送風(fēng)機(jī)生產(chǎn)廠家維修，在動平衡機(jī)上進(jìn)行校平衡。這種動平衡方修成本也比較高。如果能在工業(yè)現(xiàn)場對風(fēng)機(jī)進(jìn)行整機(jī)動平衡，消除由于不平衡引起的振動，那將具有十分重要的意義。<br /> 　影響系數(shù)法動平衡原理整機(jī)動平衡的方法很多，以影響系數(shù)法*為尚單實(shí)用。尋常風(fēng)機(jī)屬剛性轉(zhuǎn)子，滿足線性疊加原理，當(dāng)風(fēng)機(jī)的固有特性系統(tǒng)剛度阻尼質(zhì)量保持不變時，風(fēng)機(jī)的不平衡響應(yīng)的幅值同不平衡量大小成正比，不平衡響應(yīng)的相位與不平衡量的相位差為固定值。<br /> 因此風(fēng)機(jī)葉輪的不平衡常常是引起風(fēng)機(jī)振動的主要原因。<br /> 　至于其他的原因有：主軸發(fā)生彎曲變形；基礎(chǔ)或機(jī)座的剛性不夠或不牢，基礎(chǔ)鋼板薄弱、墊鐵松動、位移、地腳螺栓松動；聯(lián)軸器出現(xiàn)問題；軸承磨損，間隙過大；電氣方面的缺陷引起的振動……這些都是材質(zhì)或者技術(shù)性的問題，所以當(dāng)你發(fā)現(xiàn)風(fēng)機(jī)振動，找不到原因的時候，可以測試一下葉輪的平衡性。<br /> </span><br /> </p> </div> <div id="w4wu4aiw6uc6" class="gduo"> <span>上一篇：沒有了！</span> 下一篇：<a 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