一(yi)、電動機的故障(zhang)分類

　　電動(dong)(dong)機的(de)故障(zhang)(zhang)可分為(wei)電器(qi)(qi)故障(zhang)(zhang)和機器(qi)(qi)故障(zhang)(zhang)。機器(qi)(qi)方面的(de)重要故障(zhang)(zhang)是振動(dong)(dong)、軸承過熱、轉(zhuan)子掃膛、運行聲響異常等；電氣方面則重如果電動(dong)(dong)機繞(rao)組(zu)接地(di)、短(duan)路(lu)(lu)、開路(lu)(lu)、觸碰不良(liang)、鼠籠(long)斷條等故障(zhang)(zhang)。

二、高壓防爆電機絕緣(yuan)故障緣(yuan)故原(yuan)由說明

　　高壓防爆(bao)電機繞(rao)組絕緣故(gu)障，受絕緣材料機能，制(zhi)作工(gong)藝節制(zhi)，運行裝置環境(jing)及電、熱、化學等綜合(he)身分影響，產生的緣故(gu)原由比擬繁雜，上面聯合(he)實例(li)說(shuo)明探究。

　　1、電化學擊穿

　　某廠造氣(qi)車(che)間的兩臺故障電(dian)機(ji)，崩(beng)潰反省，1臺定(ding)子繞組(zu)三處絕(jue)(jue)緣擊(ji)穿，1臺到(dao)處絕(jue)(jue)緣擊(ji)穿，均(jun)是點(dian)蝕毀(hui)傷絕(jue)(jue)緣惹起“爬電(dian)”，呈現燒(shao)痕、縫隙(xi)、導電(dian)通道(dao)，且故障點(dian)均(jun)呈如今(jin)電(dian)動(dong)(dong)機(ji)進風口端部且有向死心偏向挪動(dong)(dong)趨向。對此，咱(zan)們從電(dian)動(dong)(dong)機(ji)布局、運行環(huan)境、操縱方法(fa)等(deng)方面說(shuo)明(ming)緣故原(yuan)由，開端認定(ding)該(gai)電(dian)機(ji)系因為選型不合理，運行環(huan)境頑劣招致電(dian)化(hua)學擊(ji)穿。

　　運(yun)行環(huan)境頑劣(lie)惹起電化(hua)(hua)(hua)學擊(ji)(ji)穿是絕緣(yuan)毀(hui)壞(huai)的(de)重要緣(yuan)故原由。氛圍中存在的(de)酸、堿性腐化(hua)(hua)(hua)氣體歷久腐化(hua)(hua)(hua)絕緣(yuan)材料外面，在氛圍濕度較(jiao)大(da)時(shi)，加快(kuai)絕緣(yuan)材料機能的(de)好轉，無機絕緣(yuan)材料在電、熱(re)、化(hua)(hua)(hua)學等身分的(de)綜(zong)合感化(hua)(hua)(hua)下，很輕易惹起毀(hui)傷終極招致(zhi)擊(ji)(ji)穿。

　　2.頻仍啟(qi)動(dong)

　　高壓防爆(bao)電(dian)機的(de)(de)頻仍(reng)啟動(dong)(dong)直(zhi)接影(ying)響其應(ying)用壽(shou)命。這是因為啟動(dong)(dong)時電(dian)動(dong)(dong)秘密承受大電(dian)流的(de)(de)打擊(ji)，繞組要(yao)承受電(dian)動(dong)(dong)機和熱應(ying)力(li)的(de)(de)疊(die)加感化。因為繞組絕緣(yuan)(yuan)材(cai)料與(yu)銅導(dao)體(ti)(ti)收縮系數不(bu)一樣(yang)的(de)(de)，在(zai)啟動(dong)(dong)時絕緣(yuan)(yuan)材(cai)料與(yu)導(dao)體(ti)(ti)之間構成很(hen)大的(de)(de)煎切應(ying)力(li)，導(dao)體(ti)(ti)與(yu)絕緣(yuan)(yuan)材(cai)料之間的(de)(de)牢固將被毀壞，絕緣(yuan)(yuan)將分層或(huo)扯破以致產(chan)生(sheng)絕緣(yuan)(yuan)擊(ji)穿。

　　鼠籠式異步電動(dong)機在頻仍啟(qi)動(dong)時，還輕易構成鼠籠斷條，尤其是(shi)負載啟(qi)動(dong)電動(dong)機，故障幾率更(geng)高。

　　3.嵌線缺點

　　嵌線時綁(bang)扎(zha)端部(bu)(bu)構成端部(bu)(bu)絕緣(yuan)壓(ya)陷毀傷，是惹起高壓(ya)電(dian)動機(ji)繞組毀傷的另一(yi)個緊(jin)張身分。凡被端環觸(chu)碰(peng)到(dao)的部(bu)(bu)位，外面絕緣(yuan)都不一(yi)樣(yang)的水(shui)平地擠壓(ya)出凹(ao)起的溝痕(hen)，至(zhi)使一(yi)部(bu)(bu)門硬化的絕緣(yuan)材(cai)料被擠壓(ya)到(dao)綁(bang)扎(zha)觸(chu)碰(peng)面的邊(bian)沿，全體固化后，此部(bu)(bu)門絕緣(yuan)顯著減(jian)薄，絕緣(yuan)強度(du)低(di)落。

　　4.端部手包絕緣品(pin)質不良

　　端(duan)部手包絕(jue)緣(yuan)(yuan)品質不(bu)良構成端(duan)部相(xiang)間(jian)(jian)(jian)或相(xiang)對地短路的(de)(de)實例異常多(duo)。手包絕(jue)緣(yuan)(yuan)包層不(bu)緊，外(wai)部有間(jian)(jian)(jian)隙，在(zai)(zai)環境濕(shi)度高時(shi)(shi)，繞組的(de)(de)絕(jue)緣(yuan)(yuan)機能顯(xian)著降低直至絕(jue)緣(yuan)(yuan)材(cai)料外(wai)面(mian)(mian)結露(lu)，此時(shi)(shi)絕(jue)緣(yuan)(yuan)外(wai)面(mian)(mian)培修網易于(yu)惹起沿(yan)面(mian)(mian)放(fang)電(dian)(dian)。其放(fang)電(dian)(dian)機理是(shi)在(zai)(zai)絕(jue)緣(yuan)(yuan)外(wai)面(mian)(mian)起首天生水膜，在(zai)(zai)電(dian)(dian)場的(de)(de)感化下(xia)，水膜被電(dian)(dian)離(li)并使離(li)子沿(yan)外(wai)面(mian)(mian)挪動、搜集，構成電(dian)(dian)場的(de)(de)不(bu)均勻(yun)散布，同時(shi)(shi)低落了外(wai)面(mian)(mian)的(de)(de)放(fang)電(dian)(dian)電(dian)(dian)壓。這(zhe)類沿(yan)外(wai)面(mian)(mian)放(fang)電(dian)(dian)實際(ji)上是(shi)一種(zhong)氣(qi)體介(jie)質放(fang)電(dian)(dian)征象，其電(dian)(dian)壓比繁多(duo)氣(qi)體或固體中(zhong)存在(zai)(zai)的(de)(de)擊穿電(dian)(dian)壓低得多(duo)，偶(ou)然(ran)延面(mian)(mian)“爬電(dian)(dian)”間(jian)(jian)(jian)隔可達數(shu)十厘(li)米。沿(yan)面(mian)(mian)放(fang)電(dian)(dian)能夠招(zhao)致高電(dian)(dian)位之間(jian)(jian)(jian)貫串性的(de)(de)擊穿閃絡，即(ji)相(xiang)間(jian)(jian)(jian)短路變亂(luan)。

河南省(sheng)南洋防(fang)爆(bao)(bao)(bao)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)有(you)限公司(si)是擁有(you)“生(sheng)產許可證”、“安全標志證”和“防(fang)爆(bao)(bao)(bao)合格證”的防(fang)爆(bao)(bao)(bao)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)生(sheng)產廠家。主(zhu)要生(sheng)產：YB/YBX3防(fang)爆(bao)(bao)(bao)電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)、YBK3系(xi)(xi)列防(fang)爆(bao)(bao)(bao)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)、YBBP變(bian)頻調速防(fang)爆(bao)(bao)(bao)電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)、YX3高效節能電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)、YB2防(fang)爆(bao)(bao)(bao)電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)、YBK2煤礦井下用防(fang)爆(bao)(bao)(bao)電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)(ji)、 稀土(tu)永(yong)(yong)磁同步(bu)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)、變(bian)頻調速永(yong)(yong)磁電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)、防(fang)爆(bao)(bao)(bao)型(xing)永(yong)(yong)磁同步(bu)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)等系(xi)(xi)列防(fang)爆(bao)(bao)(bao)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)，歡迎(ying)大家咨詢訂購。

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