電機維修后要做好哪些檢查?
一:電機外殼檢查
電機(ji)外殼檢查包括(kuo)兩個方面
(1)外殼(ke)(ke):對于隔爆(bao)(bao)型(xing)(xing)電機(ji)(ji),應(ying)該(gai)檢查(cha)隔爆(bao)(bao)接合面的(de)間(jian)隙(間(jian)隙長度(du)和間(jian)隙寬度(du))是(shi)(shi)(shi)否符合產品原(yuan)圖紙或防爆(bao)(bao)標準(zhun)的(de)規定(ding),如(ru)果(guo)(guo)外殼(ke)(ke)是(shi)(shi)(shi)新(xin)制的(de),還應(ying)該(gai)按照(zhao)標準(zhun)進行(xing)水壓(ya)試驗(yan),檢查(cha)隔爆(bao)(bao)外殼(ke)(ke)的(de)機(ji)(ji)械(xie)強度(du)。如(ru)果(guo)(guo)是(shi)(shi)(shi)在原(yuan)來的(de)外殼(ke)(ke)上(shang)進行(xing)局(ju)部機(ji)(ji)械(xie)加(jia)工(gong),則不必進行(xing)水壓(ya)試驗(yan)。其他防爆(bao)(bao)類型(xing)(xing)電機(ji)(ji)的(de)外殼(ke)(ke)是(shi)(shi)(shi)防護性(IP)殼(ke)(ke)體(ti),這類外殼(ke)(ke)維修(xiu)后主(zhu)要是(shi)(shi)(shi)檢查(cha)防護等級和機(ji)(ji)械(xie)強度(du)是(shi)(shi)(shi)否降低。
(2)風扇(shan)、風扇(shan)罩、接線盒、電纜引入裝置等應按(an)標準(zhun)要(yao)求進(jin)行檢查。
二:檢查電氣(qi)方面
(1)繞(rao)組(zu)(zu):電(dian)(dian)機維修常(chang)常(chang)需要更(geng)換(huan)繞(rao)組(zu)(zu),有些情況下僅僅需要對(dui)潮濕的(de)繞(rao)組(zu)(zu)進行(xing)干燥處理。繞(rao)組(zu)(zu)的(de)維修質星不但(dan)影(ying)響(xiang)(xiang)電(dian)(dian)動(dong)機的(de)電(dian)(dian)氣性能指標,而且影(ying)響(xiang)(xiang)電(dian)(dian)動(dong)機的(de)防(fang)爆性能。繞(rao)組(zu)(zu)更(geng)換(huan)后應(ying)該用(yong)電(dian)(dian)橋或(huo)其他方法測量(liang)各(ge)相的(de)電(dian)(dian)阻(zu)(zu),相電(dian)(dian)阻(zu)(zu)或(huo)線電(dian)(dian)阻(zu)(zu)應(ying)該平衡;用(yong)搖表測量(liang)各(ge)繞(rao)組(zu)(zu)間以及對(dui)地(di)(di)的(de)絕緣電(dian)(dian)阻(zu)(zu),并(bing)且進行(xing)繞(rao)組(zu)(zu)對(dui)地(di)(di)、相間絕緣耐電(dian)(dian)壓(ya)試(shi)驗。對(dui)于原來的(de)繞(rao)組(zu)(zu),在進行(xing)耐壓(ya)試(shi)驗時(shi)試(shi)驗電(dian)(dian)壓(ya)應(ying)該降低(di)(試(shi)驗電(dian)(dian)壓(ya)的(de)80%)。
(2)電動機空(kong)載試驗和降(jiang)低電壓下(xia)堵(du)轉試驗。
(3)如果需要,進(jin)行型(xing)式試驗或(huo)部分型(xing)式試驗項(xiang)目。對(dui)于增安型(xing)電(dian)動機,應該進(jin)行溫升試驗。
三:電(dian)機(ji)維修后的整(zheng)體(ti)檢查(cha)
(1)防爆標志牌(pai)、銘牌(pai)、警告牌(pai)是否(fou)完好;、
(2)接(jie)地端子(zi)、標志(zhi)是(shi)否(fou)完好;
(3)旋轉零件的潤滑、表(biao)面涂附;
(4)電機維修合格標志、文件(試驗報告、說明書(shu))以及相關(guan)附件等(deng);
(5)檢查和(he)試(shi)驗結果(guo)記錄并(bing)存檔備查
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