電機軸電流對軸承的危害

2021-2-25 05:31

臨時過年的尾聲了，深圳兆威機電今(jin)天給介紹一下電機軸電流對軸承(cheng)(cheng)的(de)危害，以及對軸承(cheng)(cheng)使用壽命有哪些影響？

電(dian)機軸(zhou)電(dian)流(liu)對(dui)軸(zhou)承的使(shi)用壽命有影(ying)響,根據實際運行狀況，分析電(dian)流(liu)產生的原(yuan)因,預防或電(dian)流(liu)帶來的危害。

電(dian)(dian)(dian)(dian)(dian)機軸(zhou)(zhou)(zhou)正常(chang)運行(xing)下，轉(zhuan)(zhuan)軸(zhou)(zhou)(zhou)與軸(zhou)(zhou)(zhou)承(cheng)(cheng)間(jian)有(you)潤滑油(you)(you)膜(mo)有(you)絕(jue)緣(yuan)的(de)作用(yong)。低電(dian)(dian)(dian)(dian)(dian)壓(ya)下能(neng)保(bao)護(hu)其絕(jue)緣(yuan)性不會(hui)產(chan)生軸(zhou)(zhou)(zhou)電(dian)(dian)(dian)(dian)(dian)流。電(dian)(dian)(dian)(dian)(dian)壓(ya)達(da)到一定(ding)值時,由(you)于潤滑油(you)(you)膜(mo)還(huan)未穩定(ding)形成,軸(zhou)(zhou)(zhou)電(dian)(dian)(dian)(dian)(dian)壓(ya)將擊(ji)穿(chuan)油(you)(you)膜(mo)放(fang)電(dian)(dian)(dian)(dian)(dian),軸(zhou)(zhou)(zhou)電(dian)(dian)(dian)(dian)(dian)流將從軸(zhou)(zhou)(zhou)承(cheng)(cheng)和轉(zhuan)(zhuan)軸(zhou)(zhou)(zhou)的(de)金(jin)屬接觸(chu)點通(tong)過;由(you)于金(jin)屬接觸(chu)面積(ji)很少,所以此點的(de)電(dian)(dian)(dian)(dian)(dian)流密度(du)大,會(hui)在瞬間(jian)產(chan)生溫導致軸(zhou)(zhou)(zhou)承(cheng)(cheng)局部(bu)燒熔(rong),被燒熔(rong)的(de)軸(zhou)(zhou)(zhou)承(cheng)(cheng)合金(jin)在碾壓(ya)離心力的(de)作用(yong)下飛濺到四周(zhou)。從而損壞電(dian)(dian)(dian)(dian)(dian)機軸(zhou)(zhou)(zhou),嚴重情況下還(huan)會(hui)發生火災。那(nei)么我們(men)應該哪些方(fang)面做好防(fang)范？

　(1)降低軸(zhou)(zhou)電(dian)(dian)(dian)位：在(zai)軸(zhou)(zhou)端安裝接(jie)(jie)地碳刷,使接(jie)(jie)地碳刷可靠(kao)(kao)接(jie)(jie)地，并(bing)且與轉軸(zhou)(zhou)可靠(kao)(kao)接(jie)(jie)觸，轉軸(zhou)(zhou)電(dian)(dian)(dian)位為零電(dian)(dian)(dian)位，以此消(xiao)除軸(zhou)(zhou)電(dian)(dian)(dian)流(liu)。

(2)磁平衡(heng)：在非軸(zhou)(zhou)伸端的軸(zhou)(zhou)承(cheng)座和軸(zhou)(zhou)承(cheng)支架(jia)處加絕(jue)緣隔板，以切斷軸(zhou)(zhou)電流的回路。