6AV66420DC011AX1
6AV66420DC011AX1
造成電機(jī)異常振動(dòng)和聲音的原因有哪些?
機(jī)械方面:
軸承潤(rùn)滑不良,軸承磨損;
緊固螺釘松動(dòng);
電機(jī)內(nèi)有雜物。
電磁方面:
電機(jī)過(guò)載運(yùn)行;
三相電流不平衡;
缺相;
定子,轉(zhuǎn)子繞組發(fā)生短路故障;
籠型轉(zhuǎn)子焊接部分開(kāi)焊造成斷條。
起動(dòng)電機(jī)前需做哪些工作?
測(cè)量絕緣電阻(對(duì)低電壓電機(jī)不應(yīng)低于0.5MΩ);
測(cè)量電源電壓。檢查電機(jī)接線是否正確,電源電壓是否符合要求;
檢查起動(dòng)設(shè)備是否良好;
檢查熔斷器是否合適;
檢查電機(jī)接地,接零是否良好;
檢查傳動(dòng)裝置是否有缺陷;
檢查電機(jī)環(huán)境是否合適,清除易燃品和其它雜物。
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