服務熱線
021-51338978
廠商性質:經銷商
所在地:上海市
更新時間:2024-06-12
產品簡介:
品牌 | Siemens/西門子 | 產地 | 進口 |
---|---|---|---|
加工定制 | 是 |
西門子永磁電機脫磁(磁鐵不吸)11天搞定修好,西門子力矩電機維修,西門子扭矩電機維修
永磁電機故障檢測方法
永磁電(dian)機(ji)不轉但有嗡嗡聲(sheng)
測量永(yong)磁電(dian)(dian)機(ji)接(jie)線柱,若三相(xiang)(xiang)電(dian)(dian)壓(ya)(ya)平衡且為(wei)額定電(dian)(dian)壓(ya)(ya)值(zhi),可(ke)判(pan)斷是嚴(yan)重過載,檢查的(de)(de)步驟:先去掉負載,這時永(yong)磁電(dian)(dian)機(ji)的(de)(de)轉(zhuan)速與聲音(yin)正常,可(ke)以判(pan)定過載或(huo)者負載機(ji)械部分有故障(zhang),若仍然不(bu)轉(zhuan)動(dong),可(ke)用手轉(zhuan)動(dong)一下(xia)永(yong)磁電(dian)(dian)機(ji)軸,如果很緊或(huo)轉(zhuan)不(bu)動(dong),再測三相(xiang)(xiang)電(dian)(dian)流(liu),若三相(xiang)(xiang)電(dian)(dian)流(liu)平衡,但(dan)比額定值(zhi)大,說明永(yong)磁電(dian)(dian)機(ji)的(de)(de)機(ji)械部分被卡住,可(ke)能是永(yong)磁電(dian)(dian)機(ji)油(you),軸承銹死(si),或(huo)損壞嚴(yan)重,端蓋或(huo)者油(you)蓋裝(zhuang)的(de)(de)太(tai)斜(xie),轉(zhuan)子和內膛(tang)相(xiang)(xiang)碰(掃膛(tang))當用手轉(zhuan)動(dong)永(yong)磁電(dian)(dian)機(ji)軸到(dao)(dao)某一角度時感到(dao)(dao)比較吃力或(huo)聽到(dao)(dao)周期性的(de)(de)擦擦聲,可(ke)判(pan)斷為(wei)掃膛(tang)。
永磁電機轉速慢且(qie)有嗡嗡聲
這種故障表現為軸振動,若測(ce)得(de)一(yi)相(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)(liu)為零,而另兩相(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)(liu)大(da)大(da)超過額定電(dian)(dian)(dian)(dian)流(liu)(liu),說(shuo)明是兩相(xiang)(xiang)運轉,其原因是:電(dian)(dian)(dian)(dian)路(lu)(lu)(lu)或(huo)(huo)者電(dian)(dian)(dian)(dian)源一(yi)相(xiang)(xiang)斷(duan)(duan)路(lu)(lu)(lu),或(huo)(huo)永磁電(dian)(dian)(dian)(dian)機繞組一(yi)相(xiang)(xiang)斷(duan)(duan)路(lu)(lu)(lu)。小容量(liang)(liang)的(de)(de)永磁電(dian)(dian)(dian)(dian)機可以用萬用表直接測(ce)量(liang)(liang)是否通(tong)斷(duan)(duan)。中(zhong)等容量(liang)(liang)的(de)(de)永磁電(dian)(dian)(dian)(dian)機由于繞組多采用多根導線并(bing)(bing)繞多支(zhi)路(lu)(lu)(lu)并(bing)(bing)聯,其中(zhong)若斷(duan)(duan)掉若干根或(huo)(huo)斷(duan)(duan)開(kai)一(yi)條并(bing)(bing)聯支(zhi)路(lu)(lu)(lu)時檢查(cha)起來就(jiu)比較(jiao)麻煩,這樣的(de)(de)情況通(tong)常采用相(xiang)(xiang)電(dian)(dian)(dian)(dian)流(liu)(liu)平衡(heng)法或(huo)(huo)者電(dian)(dian)(dian)(dian)阻(zu)法。電(dian)(dian)(dian)(dian)阻(zu)法用電(dian)(dian)(dian)(dian)橋測(ce)量(liang)(liang)三相(xiang)(xiang)繞組的(de)(de)電(dian)(dian)(dian)(dian)阻(zu),如三相(xiang)(xiang)電(dian)(dian)(dian)(dian)阻(zu)相(xiang)(xiang)差百分五以上,電(dian)(dian)(dian)(dian)阻(zu)較(jiao)大(da)的(de)(de)一(yi)相(xiang)(xiang)為斷(duan)(duan)路(lu)(lu)(lu)相(xiang)(xiang)。
接地故障的檢測方(fang)法
用搖表檢測(ce)電(dian)(dian)機繞(rao)組(zu)對(dui)地(di)的絕(jue)(jue)緣電(dian)(dian)阻(zu),當絕(jue)(jue)緣電(dian)(dian)阻(zu)低于0.2兆歐(ou)時(shi),說明電(dian)(dian)機嚴重(zhong)受潮。用萬用表電(dian)(dian)阻(zu)檔或(huo)校驗(yan)燈(deng)(deng)逐步檢查(cha),如(ru)果(guo)電(dian)(dian)阻(zu)較小或(huo)者校驗(yan)燈(deng)(deng)較暗說明該項繞(rao)組(zu)嚴重(zhong)受潮,需要(yao)烘(hong)干處理,如(ru)果(guo)電(dian)(dian)阻(zu)為零或(huo)者校驗(yan)燈(deng)(deng)接(jie)近正常亮度,那么(me)該項已近接(jie)地(di)了。繞(rao)組(zu)接(jie)地(di)一(yi)般發生在永磁電(dian)(dian)機出(chu)線孔(kong),電(dian)(dian)源(yuan)線的進線孔(kong)或(huo)繞(rao)組(zu)伸(shen)出(chu)槽口處對(dui)于后一(yi)種(zhong)情況,若(ruo)發現接(jie)地(di)并不嚴重(zhong),可(ke)將竹(zhu)片或(huo)絕(jue)(jue)緣紙插入(ru)定子鐵(tie)芯(xin)與繞(rao)組(zu)之(zhi)間,如(ru)經(jing)檢查(cha)已不接(jie)地(di),可(ke)包扎(zha)并涂絕(jue)(jue)緣漆后繼續(xu)使用。
繞組短(duan)路故障的檢(jian)測方法
繞組短(duan)路情況有匝(za)間短(duan)路,相(xiang)間短(duan)路。
① 利用兆歐表(biao)或者萬用表(biao)檢(jian)查任意兩相間的(de)絕緣電(dian)阻,如發現在0.2兆歐一下或為零(ling)說(shuo)明(ming)是相間短路。(檢(jian)查時應將永磁電(dian)機引線的(de)所有連(lian)線拆開) ;
② 分別測量三(san)相(xiang)繞組的(de)電(dian)流(liu),電(dian)流(liu)大的(de)為短路(lu)相(xiang);
③ 用(yong)短路探測器檢查繞組(zu)間(jian)短路 ;
④ 用(yong)電(dian)(dian)橋(qiao)測量(liang)三相繞組(zu)電(dian)(dian)阻(zu),電(dian)(dian)阻(zu)小的為短路(lu)相。
⑤ 永(yong)磁電機運(yun)轉時有(you)噪聲
故障(zhang)(zhang)分(fen)永磁(ci)(ci)(ci)電機(ji)的(de)機(ji)械(xie)部分(fen)和電磁(ci)(ci)(ci)部分(fen),區分(fen)方法:先使永磁(ci)(ci)(ci)電機(ji)通電運行,仔細聽運轉的(de)聲音,然后停電,讓(rang)永磁(ci)(ci)(ci)電機(ji)借慣性繼(ji)續運行,若這時不(bu)正常的(de)聲音消失(shi),說明是永磁(ci)(ci)(ci)電機(ji)電磁(ci)(ci)(ci)方面的(de)故障(zhang)(zhang),否則是永磁(ci)(ci)(ci)電機(ji)機(ji)械(xie)方面的(de)故障(zhang)(zhang)。
機械噪聲:
① 軸承(cheng)發(fa)出的噪(zao)聲,可能是軸承(cheng)鋼珠破損,潤滑油太少,這時,將一螺絲刀頭部頂在軸承(cheng)油蓋得外面,柄部附耳旁,可聽到咕嚕(lu)(lu)咕嚕(lu)(lu)的聲音(yin);
② 空氣(qi)摩察(cha)產(chan)生的噪聲。這種聲音很(hen)均勻,不是(shi)很(hen)強烈,可判斷為(wei)正(zheng)常。;
③ 永磁(ci)電(dian)機(ji)掃膛引起的(de)噪聲,這種噪聲的(de)特(te)點(dian)是(shi)(shi)有(you)嚓(ca)嚓(ca)的(de)聲音,對于剛修過的(de)永磁(ci)電(dian)機(ji),運行時(shi)若發(fa)現有(you)噪聲,可檢查電(dian)流是(shi)(shi)否平(ping)衡,轉(zhuan)動是(shi)(shi)否靈活,轉(zhuan)速是(shi)(shi)否達(da)到(dao)額定轉(zhuan)速,如無以上問(wen)題,可能(neng)是(shi)(shi)定子(zi)槽(cao)內絕緣(yuan)紙或竹屑突(tu)出于槽(cao)口外(wai),致使轉(zhuan)子(zi)與(yu)其相摩察這時(shi)聲音的(de)特(te)點(dian)是(shi)(shi)既(ji)尖(jian)又高。
電磁噪聲:
① 轉(zhuan)子(zi)和定子(zi)長(chang)度配合不(bu)好,轉(zhuan)子(zi)長(chang)度指(zhi)一個(ge)軸承(cheng)到另一個(ge)軸承(cheng)的(de)距(ju)離,定子(zi)長(chang)度指(zhi)從(cong)一個(ge)軸承(cheng)室(shi)到另一個(ge)軸承(cheng)室(shi)的(de)距(ju)離,正常情況下,定子(zi)長(chang)度比(bi)轉(zhuan)子(zi)長(chang)度略(lve)長(chang)一點,如相差(cha)太多,可能出(chu)現一種低沉的(de)“嗡"聲。
② 轉子軸向(xiang)移位,這種移位也可能發生電(dian)磁(ci)(ci)噪聲(sheng),而且造成空載電(dian)流(liu)增大,永磁(ci)(ci)電(dian)機的電(dian)池(chi)性能降低;
③ 定子,轉(zhuan)子槽數配合不(bu)當,裝配過程中錯裝了另外的轉(zhuan)子;
④ 定子(zi)轉(zhuan)子(zi)間氣息不均勻(yun),定子(zi)轉(zhuan)子(zi)失(shi)圓(yuan),也可能(neng)是軸有(you)輕微的彎曲等。永磁電機繞(rao)組缺相(xiang),匝(za)間短路,相(xiang)間短路,過載(zai)運行(xing)等均能(neng)引起(qi)電磁噪(zao)聲。
定子繞組接(jie)地
① 冒煙法:對于接地繞組(zu),在鐵(tie)芯(xin)(xin)與線圈間(jian)加以較低電(dian)(dian)壓(ya)(ya),用調(diao)壓(ya)(ya)器調(diao)節電(dian)(dian)壓(ya)(ya),限制電(dian)(dian)流在5安內(nei),以防燒損鐵(tie)芯(xin)(xin),電(dian)(dian)流通過(guo)接地點時,在故障處產生熱量,繞組(zu)絕緣會冒煙,甚(shen)至產生火花,從(cong)而發生故障點;
② 電(dian)(dian)流定(ding)向(xiang)法:將(jiang)故(gu)(gu)障(zhang)(zhang)的一相(xiang)(xiang)首相(xiang)(xiang)和尾相(xiang)(xiang)相(xiang)(xiang)連(lian),接(jie)入被測電(dian)(dian)路,線圈內的電(dian)(dian)流方向(xiang)如圖,兩電(dian)(dian)流一同流向(xiang)接(jie)地點(dian)(dian),在(zai)槽頂(ding)放(fang)一小(xiao)磁(ci)針(zhen),逐槽移動,小(xiao)磁(ci)針(zhen)改變(bian)方向(xiang)的地點(dian)(dian),就是接(jie)地點(dian)(dian)所在(zai)槽,再把小(xiao)磁(ci)針(zhen)沿著槽做(zuo)軸(zhou)向(xiang)移動,小(xiao)磁(ci)針(zhen)在(zai)故(gu)(gu)障(zhang)(zhang)點(dian)(dian)又(you)會改變(bian)方向(xiang),那么(me)這(zhe)點(dian)(dian)就為接(jie)地點(dian)(dian)。
為了(le)保證(zheng)異(yi)步永(yong)磁(ci)(ci)電(dian)機(ji)的安全(quan)運(yun)行(xing),必須掌握有(you)關異(yi)步永(yong)磁(ci)(ci)電(dian)機(ji)的安全(quan)運(yun)行(xing)的基本(ben)知(zhi)識(shi),加強巡(xun)回檢查和維護,做到盡可能地及時發(fa)現并消除永(yong)磁(ci)(ci)電(dian)機(ji)的事(shi)故隱患,保證(zheng)永(yong)磁(ci)(ci)電(dian)機(ji)安全(quan)運(yun)行(xing)。
西門子永磁電機脫磁(磁鐵不吸)11天搞定修好,西(xi)(xi)門子力矩電(dian)機(ji)維修,西(xi)(xi)門子扭矩電(dian)機(ji)維修