在選用防爆電機時要注意以下三點

人氣：2036   發表時間：2020-05-13 04:38:42

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在(zai)選用(yong)防爆電機(ji)時要(yao)注意以下三點

1、隔爆型電機的(de)隔爆等級符(fu)合易燃、易爆環境(jing)的(de)要(yao)求(qiu)即可，不(bu)要(yao)選(xuan)級別高的(de)。　

2、按(an)照實際使用情況確定技術指標，技術指標中 η、cos φ越高越好(hao)，節省電能，其余指標則不(bu)盡然。

比如拖動(dong)軸流式泵和(he)風機的電機，Tst在0.6~0.8的范(fan)圍內即可(ke)，Tm也不必高，1.6左右就能滿足使(shi)(shi)用要(yao)(yao)求。若(ruo)買方在這(zhe)兩項指標(biao)上(shang)稍(shao)許松(song)動(dong)一點，設計者(zhe)可(ke)以(yi)把從這(zhe)挖出的過剩功能貼補到Ist上(shang)，即用于降低Ist。這(zhe)對于網絡容量(liang)小的使(shi)(shi)用場所則很有實(shi)際意(yi)義(yi)。二極電機的負荷絕大(da)部分是風機和(he)泵，Tst高沒必要(yao)(yao)。若(ruo)生(sheng)產廠過于追求這(zhe)一指標(biao)，將鑄鋁轉子槽形(xing)的上(shang)半部設計得很窄，給制(zhi)造增加(jia)不必要(yao)(yao)的難(nan)度;使(shi)(shi)用中由斷條、細條引發(fa)的故障也多。

3、防護等級要選得適中。

IP54與IP44之差主要(yao)(yao)在防塵功能(neng)上(shang)。有(you)的買主為了省錢，在該用IP54的場所(suo)中選用IP44的電機(ji)，使電機(ji)軸承(cheng)過早地(di)損壞。反之，IP44 能(neng)滿足使用要(yao)(yao)求時，無需(xu)選P54的。后者要(yao)(yao)加設橡膠(jiao)密封(feng)圈，維護上(shang)不如前者。

防爆電(dian)機(ji)防護等級最低為(wei) IP55，而(er)普(pu)通電(dian)機(ji)有IPIP23、IP44、IP54、IP55、IP56不(bu)等，故而(er)從(cong)外形可(ke)以分辨(bian)出(chu)。   

防爆電機按產品類型可分

可分為防爆(bao)異步(bu)(bu)電機(ji)、防爆(bao)同步(bu)(bu)電機(ji)及(ji)防爆(bao)直流電機(ji)等

可(ke)分(fen)為煤礦井下用(yong)防(fang)爆(bao)電(dian)機及工廠用(yong)防(fang)爆(bao)電(dian)機

可分為煤(mei)礦(kuang)運輸機(ji)(ji)用(yong)(yong)防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji)、煤(mei)礦(kuang)絞車用(yong)(yong)防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji)、裝巖機(ji)(ji)用(yong)(yong)防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji)、煤(mei)礦(kuang)局部扇風機(ji)(ji)用(yong)(yong)防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji)、閥門(men)用(yong)(yong)防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji)、風機(ji)(ji)用(yong)(yong)防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji)、船用(yong)(yong)防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji)、關注(zhu)修心養身(shen)密碼公眾(zhong)號，學習養生(sheng)和防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)知識。起(qi)(qi)重(zhong)冶 金用(yong)(yong)防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji)及加氫裝置配(pei)套用(yong)(yong)增安型(xing)無(wu)刷勵磁(ci)同步電(dian)(dian)(dian)機(ji)(ji)等。此外，還可以按額定(ding)電(dian)(dian)(dian)壓、效率等技(ji)術指標來分，如高(gao)壓防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji)、高(gao)效防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji)、高(gao)轉差率防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji) 及高(gao)起(qi)(qi)動轉矩防(fang)(fang)(fang)爆(bao)(bao)(bao)(bao)(bao)電(dian)(dian)(dian)機(ji)(ji)等。