電機維修的損壞情況經常發生,影響了輪胎的質量和產量,給企業帶來一定的經濟損失。主要有環境條件、線路故障、負載條件、電壓高低、操作使用、維修水平和電機自身質量等原因造成的,在這里直流電機維修現對上述原因作簡要分析。
環境對電(dian)機(ji)的(de)正常運行起著(zhu)十分(fen)重(zhong)(zhong)要(yao)的(de)作用,電(dian)機(ji)在極(ji)限(xian)溫度下達不到熱(re)平衡時(shi),會因嚴重(zhong)(zhong)發熱(re)而(er)燒毀。
在某(mou)種情況(kuang)下,電(dian)(dian)機(ji)(ji)維修電(dian)(dian)網電(dian)(dian)壓(ya)會出現過高過低(di)的情(qing)況,在短時(shi)間內,電(dian)(dian)壓(ya)偏高偏低(di)不會影響電(dian)(dian)機(ji)(ji)。但(dan)是,若(ruo)電(dian)(dian)機(ji)(ji)長時(shi)間在低(di)電(dian)(dian)壓(ya)下工作,由(you)(you)于(yu)銅耗(hao)增(zeng)加,力矩降低(di),則電(dian)(dian)機(ji)(ji)會由(you)(you)于(yu)過載(zai)而燒毀(hui);電(dian)(dian)壓(ya)過高,定子磁(ci)回路飽和(he),使電(dian)(dian)流劇(ju)增(zeng),導致電(dian)(dian)機(ji)(ji)燒毀(hui)。
三相(xiang)交流異步電(dian)(dian)動(dong)機(ji)在缺(que)二相(xiang)或三相(xiang)時,定(ding)子繞組里沒有形(xing)成閉合回(hui)路(lu)(lu),即沒有電(dian)(dian)流,這時電(dian)(dian)機(ji)維(wei)修(xiu)不旋轉。電(dian)(dian)機(ji)的損壞(huai)主要(yao)是(shi)缺(que)一(yi)相(xiang)引起的,故對電(dian)(dian)機(ji)主回(hui)路(lu)(lu)接觸器及線路(lu)(lu)節點的定(ding)期(qi)檢修(xiu)是(shi)十(shi)分必要(yao)的。要(yao)特別注意起動(dong)后(hou)運行(xing)中的電(dian)(dian)機(ji)斷(duan)相(xiang),一(yi)旦遇(yu)到這種情況,應立即切(qie)斷(duan)電(dian)(dian)源,以保護電(dian)(dian)機(ji)。
對于由(you)電(dian)機(ji)自身質(zhi)量而(er)產生(sheng)的故障(zhang),這(zhe)主要靠電(dian)機(ji)制造廠和(he)電(dian)機(ji)修理部門,把好(hao)制造質(zhi)量和(he)修理質(zhi)量,使電(dian)機(ji)各項性(xing)能達到技術(shu)要求(qiu),從而(er)減少因此產生(sheng)的故障(zhang)。
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