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怎樣判(pan)斷振動(dong)平臺振動(dong)電機(ji)的好(hao)壞(huai)(振動(dong)方向平行(xing))
熟悉振動(dong)(dong)(dong)平(ping)臺的(de)(de)客戶(hu)都(dou)知道(dao)，該設(she)備的(de)(de)工作(zuo)環境復雜多變，工作(zuo)環境極差，振動(dong)(dong)(dong)電(dian)機又是(shi)設(she)備重要的(de)(de)部(bu)件(jian)，那(nei)么(me)在使(shi)用時振動(dong)(dong)(dong)電(dian)機的(de)(de)好(hao)壞就(jiu)成了核(he)心的(de)(de)問題。振動(dong)(dong)(dong)電(dian)機組成部(bu)件(jian)中(zhong)會(hui)使(shi)用到(dao)銅(tong)線(xian)(xian)(xian)和鋁線(xian)(xian)(xian)，不(bu)同性質的(de)(de)線(xian)(xian)(xian)起到(dao)的(de)(de)作(zuo)用也是(shi)不(bu)相同的(de)(de)，所以要想判斷振動(dong)(dong)(dong)平(ping)臺振動(dong)(dong)(dong)電(dian)機的(de)(de)好(hao)壞，可以從銅(tong)線(xian)(xian)(xian)和綠線(xian)(xian)(xian)來下功夫(fu)。
銅(tong)線(xian)(xian)(xian)與鋁(lv)線(xian)(xian)(xian)互換的截面(mian)比率為0.79：1 ，六平(ping)方的銅(tong)線(xian)(xian)(xian)相當于十平(ping)方的鋁(lv)線(xian)(xian)(xian)。用鋁(lv)線(xian)(xian)(xian)直徑要比銅(tong)線(xian)(xian)(xian)粗，同(tong)樣的定(ding)子線(xian)(xian)(xian)槽鋁(lv)線(xian)(xian)(xian)會放不下。單(dan)位面(mian)積的通(tong)過電流量也(ye)不同(tong)，銅(tong)線(xian)(xian)(xian)大概是每平(ping)方毫(hao)米(mi)能(neng)通(tong)過5-8A電流，鋁(lv)線(xian)(xian)(xian)就要少多了(le)，大概是3-5A了(le)。
除(chu)了銅(tong)線(xian)(xian)(xian)和鋁(lv)(lv)線(xian)(xian)(xian)的截流(liu)量(liang)和材質不同(tong)以外(wai)，主(zhu)要區別在(zai)(zai)于：鋁(lv)(lv)線(xian)(xian)(xian)質量(liang)更(geng)輕，相對較(jiao)便(bian)宜(yi)，機械強度(du)較(jiao)差，鋁(lv)(lv)線(xian)(xian)(xian)在(zai)(zai)接(jie)駁線(xian)(xian)(xian)端極(ji)容(rong)易氧(yang)化(hua)(hua)，接(jie)駁線(xian)(xian)(xian)端氧(yang)化(hua)(hua)后(hou)會出現溫(wen)度(du)升(sheng)高、接(jie)觸(chu)不良，是(shi)引起故障(zhang)(斷電或斷線(xian)(xian)(xian))的多發(fa)點(dian)。另外(wai)鋁(lv)(lv)不容(rong)易焊接(jie)，強度(du)小，熔點(dian)低，易氧(yang)化(hua)(hua)，溫(wen)升(sheng)高，耗損(sun)大。
后要(yao)說的(de)就是(shi)電(dian)(dian)阻率(lv)(lv)了，銅線的(de)電(dian)(dian)阻率(lv)(lv)是(shi)0.017，鋁(lv)線的(de)電(dian)(dian)阻率(lv)(lv)是(shi)0.028。因為電(dian)(dian)阻率(lv)(lv)越(yue)小那么電(dian)(dian)線的(de)過電(dian)(dian)量越(yue)大，電(dian)(dian)流就越(yue)穩定，所以(yi)振動平(ping)臺的(de)線包要(yao)用銅線。
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