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當前位置:首頁 ? 行業資訊 ? 【邢臺發電機出租租賃】為什么發電機組會產生軸電流

【邢臺發電機出租租賃】為什么發電機組會產生軸電流

發布來源:山東龍佩機電設備有限公司  發布日期: 2021-07-08  訪問量:1927

當發(fa)(fa)電(dian)(dian)機(ji)組(zu)產生軸(zhou)電(dian)(dian)流(liu)的(de)(de)原因歸咎于電(dian)(dian)磁效應,其對運行周期較長的(de)(de)發(fa)(fa)電(dian)(dian)機(ji)組(zu)破壞較為嚴重。主要表現為:軸(zhou)電(dian)(dian)流(liu)在(zai)發(fa)(fa)電(dian)(dian)機(ji)組(zu)的(de)(de)徑向(xiang)軸(zhou)承、推力軸(zhou)承、浮(fu)環密封(feng)、聯(lian)軸(zhou)節及(ji)傳動齒輪等部(bu)位產生電(dian)(dian)火花放電(dian)(dian),傷害(hai)金屬表面,破壞油(you)膜(mo)。如果(guo)長時間沒被發(fa)(fa)現,將對發(fa)(fa)電(dian)(dian)機(ji)組(zu)的(de)(de)機(ji)械零部(bu)件產生嚴重的(de)(de)破壞。究竟為何發(fa)(fa)電(dian)(dian)機(ji)組(zu)會產生軸(zhou)電(dian)(dian)流(liu)呢?

原因有以下幾點:

在發電機組是電機類轉子的情況下,原因主要是磁力(li)線分布的不(bu)(bu)對稱(cheng)(cheng)效應及其轉軸(zhou)的磁化效應產生軸(zhou)電流,而磁力(li)線分布不(bu)(bu)對稱(cheng)(cheng)通常是因為疊片層(ceng)的不(bu)(bu)對稱(cheng)(cheng)的間隙引起(qi)的。

還有(you)一種是由(you)于外部電(dian)位施加(jia)而生(sheng)成軸(zhou)電(dian)流(liu)的(de)現象(xiang),其原(yuan)因是,移(yi)動式發(fa)電(dian)機組旋轉磁場切割導(dao)體(ti)或轉子不(bu)平衡而導(dao)致(zhi)轉軸(zhou)磁化(hua),摩擦、焊(han)接、碰撞以及電(dian)渦流(liu)裝置(zhi)均可(ke)能導(dao)致(zhi)設(she)備帶有(you)磁性,并建立起磁場。

當旋轉磁場切割導體時,會(hui)(hui)在(zai)這(zhe)些零件(jian)內(nei)感應形成(cheng)(cheng)一定(ding)電(dian)(dian)(dian)位(wei)(wei),電(dian)(dian)(dian)位(wei)(wei)升高到足(zu)以(yi)(yi)擊穿油膜時,就會(hui)(hui)形成(cheng)(cheng)電(dian)(dian)(dian)流(liu)回路(lu)。這(zhe)種(zhong)電(dian)(dian)(dian)流(liu)回路(lu)可能會(hui)(hui)穿過整個轉子(zi),也可能僅(jin)僅(jin)在(zai)軸承(cheng)中(zhong)(zhong)或浮(fu)環(huan)密(mi)封(feng)中(zhong)(zhong)形成(cheng)(cheng)局部的(de)(de)短路(lu)電(dian)(dian)(dian)流(liu),而這(zhe)些電(dian)(dian)(dian)流(liu)又會(hui)(hui)產生(sheng)新的(de)(de)磁場,磁化(hua)轉軸或其(qi)他零件(jian),因此(ci)這(zhe)種(zhong)磁電(dian)(dian)(dian)相互轉換(huan),會(hui)(hui)在(zai)發(fa)電(dian)(dian)(dian)機(ji)組(zu)內(nei)形成(cheng)(cheng)很強的(de)(de)磁場,并出現(xian)很高的(de)(de)電(dian)(dian)(dian)流(liu)。引(yin)起發(fa)電(dian)(dian)(dian)機(ji)組(zu)產生(sheng)軸電(dian)(dian)(dian)流(liu)的(de)(de)電(dian)(dian)(dian)壓(ya)(ya)在(zai)20V以(yi)(yi)上,損傷的(de)(de)電(dian)(dian)(dian)壓(ya)(ya)在(zai)30~100V之(zhi)間(jian),因此(ci)保證(zheng)發(fa)電(dian)(dian)(dian)機(ji)組(zu)正常運行可以(yi)(yi)有效限制發(fa)電(dian)(dian)(dian)機(ji)組(zu)的(de)(de)電(dian)(dian)(dian)壓(ya)(ya),一旦電(dian)(dian)(dian)壓(ya)(ya)低(di)于(yu)1V是絕對不會(hui)(hui)產生(sheng)軸電(dian)(dian)(dian)流(liu)的(de)(de)。

//redultras.net