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奉賢電機使用的必備基礎知識都有哪些?

發表時間:2024-05-16 訪問量:26394

一、檢查

1、認真檢查銘牌數據,確認電動機型號符合使用要求。奉賢汽保設備配件

2、用500V兆歐(ou)表測量(liang)電動機(ji)繞(rao)組對外殼的絕緣電阻,絕緣電阻 應大(da)于0.5MΩ。

二、安裝

1、電動機(ji)—般安(an)裝在室內清(qing)潔、干燥的場所,周圍必須通(tong)風良好,環境空氣(qi)更高(gao)溫度不(bu)超過40℃,更低(di)溫度不(bu)低(di)于-15℃,并應(ying)防(fang)止強烈的熱(re)輻射(she)。

2、電動(dong)(dong)機控制電器應有缺相保(bao)(bao)護(hu)(hu)和(he)過(guo)(guo)載(zai)(zai)熱保(bao)(bao)護(hu)(hu)裝置(zhi)(zhi),YA系列增安型電動(dong)(dong)機須根據銘牌tE時間及(ji)起(qi)動(dong)(dong)電流比IA/IN選擇合適的過(guo)(guo)載(zai)(zai)熱保(bao)(bao)護(hu)(hu)裝置(zhi)(zhi)。

3、按接(jie)(jie)線圖接(jie)(jie)電(dian)源線接(jie)(jie)線頭連(lian)接(jie)(jie)要緊固,帶引出電(dian)纜、電(dian)線的電(dian)動機,可直接(jie)(jie)和電(dian)源線連(lian)接(jie)(jie),接(jie)(jie)頭處要絕緣密封(feng)。

4、當電(dian)(dian)源(yuan)線,相(xiang)序和電(dian)(dian)動粗接線頭標志對應連(lian)接時,從軸伸(shen)端看電(dian)(dian)動機順時針旋轉。需要改變(bian)轉向時,改變(bian)兩根電(dian)(dian)源(yuan)線接線的位置即可。

5、YD系列(lie)等變級多(duo)速(su)異步電動(dong)機(ji)(ji)(ji)(ji)(ji)是利(li)用(yong)換(huan)接引(yin)出(chu)線(xian)的(de)(de)方法(fa)來控(kong)制轉速(su)變化的(de)(de),為保(bao)證多(duo)速(su)電動(dong)機(ji)(ji)(ji)(ji)(ji)運行的(de)(de)可靠性,設(she)計和(he)操(cao)作控(kong)制裝置(zhi)時應(ying)注意,在高速(su)切換(huan)為低(di)速(su)時,必(bi)須在切斷電源(yuan)(yuan)的(de)(de)同(tong)時斷開2Y接線(xian)的(de)(de)中(zhong)性點(dian),以免在低(di)速(su)繞組接通(tong)(tong)時引(yin)起電源(yuan)(yuan)短路.在高速(su)切換(huan)為低(di)速(su)的(de)(de)過程(cheng)中(zhong),必(bi)續待電動(dong)機(ji)(ji)(ji)(ji)(ji)停轉后(hou)才能(neng)接通(tong)(tong)低(di)速(su)繞組的(de)(de)電源(yuan)(yuan),以減(jian)少對電動(dong)機(ji)(ji)(ji)(ji)(ji)及負載的(de)(de)沖擊.轉速(su)切換(huan)要注意電動(dong)機(ji)(ji)(ji)(ji)(ji)的(de)(de)轉向。

6、電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)可以(yi)(yi)采有聯(lian)軸(zhou)(zhou)(zhou)器,齒輪、皮(pi)帶(dai)與(yu)負載機(ji)械(xie)(xie)聯(lian)接,4kw以(yi)(yi)上的2極電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)30kw以(yi)(yi)上的4極電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)不宜用(yong)皮(pi)帶(dai)傳動(dong)(dong)(dong)(dong)(dong),雙軸(zhou)(zhou)(zhou)伸電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)的第二軸(zhou)(zhou)(zhou)伸只能(neng)用(yong)聯(lian)軸(zhou)(zhou)(zhou)囂傳動(dong)(dong)(dong)(dong)(dong)。聯(lian)軸(zhou)(zhou)(zhou)器、皮(pi)帶(dai)輪軸(zhou)(zhou)(zhou)孔(kong)與(yu)電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)軸(zhou)(zhou)(zhou)的配合(he)松緊應(ying)合(he)適,安(an)裝時(shi)嚴禁(jin)用(yong)重(zhong)錘敲擊(ji)。 采用(yong)聯(lian)軸(zhou)(zhou)(zhou)器傳動(dong)(dong)(dong)(dong)(dong)時(shi),電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)軸(zhou)(zhou)(zhou)中(zhong)(zhong)(zhong)心線與(yu)負載機(ji)械(xie)(xie)軸(zhou)(zhou)(zhou)中(zhong)(zhong)(zhong)心線應(ying)重(zhong)合(he),聯(lian)軸(zhou)(zhou)(zhou)器軸(zhou)(zhou)(zhou)向保留(liu)1~3mm間隙。 采用(yong)皮(pi)帶(dai)傳達室(shi)動(dong)(dong)(dong)(dong)(dong)時(shi),電(dian)(dian)(dian)(dian)動(dong)(dong)(dong)(dong)(dong)機(ji)軸(zhou)(zhou)(zhou)中(zhong)(zhong)(zhong)心線應(ying)與(yu)負載機(ji)械(xie)(xie)軸(zhou)(zhou)(zhou)中(zhong)(zhong)(zhong)心線平行,皮(pi)帶(dai)中(zhong)(zhong)(zhong)心線與(yu)軸(zhou)(zhou)(zhou)中(zhong)(zhong)(zhong)心線相互垂直。

三、接地

電(dian)(dian)動機必須可靠接地(di),接地(di)方式、接地(di)電(dian)(dian)阻(zu)等應符合(he)《工業與民用 電(dian)(dian)力(li)裝(zhuang)置的接地(di)設計(ji)規范》《工廠(chang)電(dian)(dian)力(li)設計(ji)技術規范》等電(dian)(dian)氣安全管理 的規定,接地(di)電(dian)(dian)阻(zu)小于(yu)4Ω。

四、起動

1、合閘后電動機應立即起(qi)動起(qi)來,達到正常轉速并(bing)平穩(wen)運行,否 則皮立即切斷電源,檢查并(bing)排除故障。

2、起動后注意觀察(cha)電(dian)動機(ji)傳動裝置(zhi)、負載機(ji)械、電(dian)壓表和(he)電(dian)流(liu)表, 若有異常(chang)現象應立即停機(ji)。

3、電(dian)(dian)動(dong)(dong)機(ji)空(kong)載連續起動(dong)(dong)一般不超過4次,運(yun)行至熱(re)態(tai)停機(ji)后(hou)連續 起動(dong)(dong)不得超過2次,否則(ze)容易燒壞電(dian)(dian)動(dong)(dong)機(ji)。

4、根據(ju)電網容量(liang)、負載大小和電動機功率等(deng),合理(li)選擇起動方(fang)式, 較大功率電動機宜采(cai)采(cai)用一三(san)角法(fa)或(huo)降壓(ya)方(fang)式起動。

五、運行

1、電(dian)源電(dian)壓與(yu)額(e)定電(dian)壓的偏差不超過±5%,三相電(dian)壓不平衡不超過1.5%。

2、電動(dong)機運行電流(liu)(liu)不(bu)(bu)得超過(guo)銘牌上的額定電流(liu)(liu),三相電流(liu)(liu)不(bu)(bu)平(ping)衡量不(bu)(bu)超過(guo)80%,否則(ze)會造成電動(dong)機發熱甚至燒毀。

3、用溫度計測量電動機機殼表面溫度應不(bu)超過80℃,軸(zhou)承的溫度應不(bu)超過95℃。

4、電動機(ji)(ji)應經常(chang)保持清潔、干燥、通(tong)風良好,進風口與出風口必霜保持暢通(tong)。5、運行中電動機(ji)(ji)出現冒煙、劇烈(lie)振動、異常(chang)聲音、特(te)殊氣味、轉速明顯下降;負載(zai)設備出現故障;發生人身觸電時(shi)應立(li)即斷電停機(ji)(ji)。

 六、軸(zhou)承潤(run)滑

1、電動機(ji)軸承潤滑應良好,一般(ban)運(yun)行3000-5000小時后,應停機(ji)保養(yang)補充或更換潤滑脂(zhi),潤滑脂(zhi)牌號為ZL--3鋰基潤滑脂(zhi)。

2、存放或(huo)停用時(shi)(shi)間超過兩年的電動機(ji)使(shi)用前應對軸承(cheng)的潤(run)(run)滑情況進(jin)行(xing)檢查,必(bi)要時(shi)(shi)補充(chong)或(huo)更換潤(run)(run)滑脂。

3、中心高(gao)132及以下(xia)機(ji)(ji)座(zuo)號電(dian)動(dong)(dong)機(ji)(ji)用(yong)密封(feng)(feng)(feng)軸承(cheng),中心高(gao)160以 上機(ji)(ji)座(zuo)號電(dian)動(dong)(dong)機(ji)(ji)一般用(yong)非密封(feng)(feng)(feng)軸承(cheng),電(dian)動(dong)(dong)機(ji)(ji)使(shi)用(yong)過程中密封(feng)(feng)(feng)軸承(cheng)不必 更(geng)換潤(run)(run)滑(hua)(hua)脂(zhi)(zhi).非密封(feng)(feng)(feng)軸承(cheng)應(ying)定期更(geng)換清潔的(de)潤(run)(run)滑(hua)(hua)脂(zhi)(zhi).潤(run)(run)滑(hua)(hua)脂(zhi)(zhi)加注要適 量,一般填充軸承(cheng)內外圈之間空腔(qiang)的(de)1/3-1/2,有注脂(zhi)(zhi)裝置的(de)電(dian)動(dong)(dong)機(ji)(ji),用(yong)潤(run)(run)滑(hua)(hua)槍加注3-4下(xia)即可,加注前打開軸承(cheng)蓋(gai)(gai)底部的(de)排放(fang)(fang)孔(kong)或 蓋(gai)(gai)板,電(dian)動(dong)(dong)機(ji)(ji)運行(xing)20分(fen)鐘后再堵(du)上排放(fang)(fang)孔(kong)或上好蓋(gai)(gai)板,拆(chai)裝排放(fang)(fang)孔(kong)螺 塞或蓋(gai)(gai)板時應(ying)斷(duan)電(dian)停(ting)機(ji)(ji)

 七、運輸及貯(zhu)存

在運輸過程中(zhong)電動機應(ying)不受潮,軸伸不磕碰,零件不損壞等.貯 存場所應(ying)保持清潔、干燥(zao)、通風,無腐蝕性氣體,避(bi)免環境溫度的(de)急劇變(bian)化等。

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