西門子伺服電(dian)機零(ling)點(dian)對位（2小時調好）

電(dian)(dian)(dian)機(ji)(ji)(ji)維修電(dian)(dian)(dian)機(ji)(ji)(ji)是(shi)一(yi)(yi)種旋轉(zhuan)式電(dian)(dian)(dian)機(ji)(ji)(ji)器(qi)，它(ta)(ta)將(jiang)電(dian)(dian)(dian)能(neng)轉(zhuan)變為機(ji)(ji)(ji)械(xie)能(neng)，它(ta)(ta)主要(yao)包括一(yi)(yi)個用(yong)以產生磁場的(de)(de)(de)(de)電(dian)(dian)(dian)磁鐵繞(rao)組(zu)(zu)或分(fen)(fen)布(bu)的(de)(de)(de)(de)定子(zi)繞(rao)組(zu)(zu)和(he)一(yi)(yi)個旋轉(zhuan)電(dian)(dian)(dian)樞(shu)或轉(zhuan)子(zi)。在定子(zi)繞(rao)組(zu)(zu)旋轉(zhuan)磁場的(de)(de)(de)(de)作(zuo)用(yong)下(xia)，其在定子(zi)繞(rao)組(zu)(zu)有效(xiao)邊中有電(dian)(dian)(dian)流通(tong)過并受磁場的(de)(de)(de)(de)作(zuo)用(yong)而使(shi)其轉(zhuan)動(dong)(dong)(dong)。根(gen)據電(dian)(dian)(dian)機(ji)(ji)(ji)可逆性原則(ze)，如(ru)果電(dian)(dian)(dian)機(ji)(ji)(ji)在其結(jie)構上沒(mei)有發生任何改變，電(dian)(dian)(dian)機(ji)(ji)(ji)即電(dian)(dian)(dian)機(ji)(ji)(ji)使(shi)用(yong)，也(ye)可作(zuo)發電(dian)(dian)(dian)機(ji)(ji)(ji)使(shi)用(yong)。它(ta)(ta)是(shi)將(jiang)電(dian)(dian)(dian)能(neng)轉(zhuan)變為機(ji)(ji)(ji)械(xie)能(neng)的(de)(de)(de)(de)一(yi)(yi)種機(ji)(ji)(ji)器(qi)。通(tong)常電(dian)(dian)(dian)機(ji)(ji)(ji)的(de)(de)(de)(de)作(zuo)功(gong)(gong)部分(fen)(fen)作(zuo)旋轉(zhuan)運(yun)動(dong)(dong)(dong)，這種電(dian)(dian)(dian)機(ji)(ji)(ji)稱(cheng)為轉(zhuan)子(zi)電(dian)(dian)(dian)機(ji)(ji)(ji)；也(ye)有作(zuo)直線(xian)(xian)運(yun)動(dong)(dong)(dong)的(de)(de)(de)(de)，稱(cheng)為直線(xian)(xian)電(dian)(dian)(dian)機(ji)(ji)(ji)。電(dian)(dian)(dian)機(ji)(ji)(ji)能(neng)提(ti)供的(de)(de)(de)(de)功(gong)(gong)率范圍很大(da)，從(cong)毫瓦級到千(qian)瓦級。機(ji)(ji)(ji)床、水泵，需要(yao)電(dian)(dian)(dian)機(ji)(ji)(ji)帶(dai)動(dong)(dong)(dong)；電(dian)(dian)(dian)力機(ji)(ji)(ji)車、電(dian)(dian)(dian)梯，需要(yao)電(dian)(dian)(dian)機(ji)(ji)(ji)牽(qian)引。

電機發動(dong)機溫度(du)怕(pa)高不怕(pa)低：

有些人(ren)認為行(xing)車(che)時發動(dong)機溫度怕(pa)高不怕(pa)低(di)。其實，發動(dong)機溫度低(di)時危(wei)害(hai)性(xing)也很大。應根據汽車(che)使用說(shuo)明書規(gui)定的正常(chang)溫度行(xing)車(che)，才能(neng)保證發動(dong)機的使用壽命。

2、水泵風扇皮帶越(yue)緊越(yue)好： 

皮(pi)(pi)帶(dai)(dai)越緊并非越好。皮(pi)(pi)帶(dai)(dai)過(guo)緊不僅會使其拉長或斷(duan)裂，縮(suo)短皮(pi)(pi)帶(dai)(dai)的(de)使用壽命，而且還會因拉力過(guo)大，導致發電機軸(zhou)、水泵軸(zhou)變形彎曲(qu)和(he)軸(zhou)承的(de)早期(qi)損壞。汽車發動機風扇皮(pi)(pi)帶(dai)(dai)的(de)松緊度(du)應符合(he)技術要求，一般正(zheng)常皮(pi)(pi)帶(dai)(dai)裝(zhuang)配(pei)時撓曲(qu)度(du)為10-15mm為宜。

3、盲目拆掉發動(dong)機(ji)節(jie)溫器 ：

如果因(yin)發(fa)動(dong)(dong)機(ji)(ji)溫(wen)度高而盲目拆除節溫(wen)器，冷卻液只能(neng)(neng)進行(xing)大循環，不(bu)能(neng)(neng)調節冷卻強(qiang)度，難以保(bao)證發(fa)動(dong)(dong)機(ji)(ji)在較(jiao)適宜的溫(wen)度下(xia)(xia)工作(zuo)，反(fan)而使發(fa)動(dong)(dong)機(ji)(ji)經(jing)常處于低溫(wen)狀態下(xia)(xia)工作(zuo)，造成發(fa)動(dong)(dong)機(ji)(ji)功率下(xia)(xia)降(jiang)，磨(mo)損加快，油耗增加。如果發(fa)動(dong)(dong)機(ji)(ji)節溫(wen)器發(fa)生故障檢修或更換之(zhi)后，發(fa)動(dong)(dong)機(ji)(ji)溫(wen)度還高，就應(ying)檢修冷卻系統的其他部位，不(bu)能(neng)(neng)拆除節溫(wen)器。

4、電(dian)機用怠速升溫：

用怠速升溫時，由于(yu)轉速較(jiao)低，機(ji)(ji)油泵不能(neng)較(jiao)快地將潤(run)(run)滑油壓(ya)入各　　潤(run)(run)滑表面，油壓(ya)也低，使(shi)發(fa)動(dong)機(ji)(ji)各運(yun)動(dong)機(ji)(ji)件(jian)在干(gan)摩擦(ca)或半干(gan)摩擦(ca)狀態下工作；燃(ran)油因低溫霧化不良，使(shi)未燃(ran)燒的(de)(de)燃(ran)油竄入曲軸箱，沖刷(shua)掉(diao)缸壁(bi)上的(de)(de)油膜，也會加速機(ji)(ji)件(jian)的(de)(de)磨損。所以(yi)，發(fa)動(dong)機(ji)(ji)啟(qi)動(dong)數(shu)秒(miao)后，應用快怠速升溫，改善發(fa)動(dong)機(ji)(ji)的(de)(de)潤(run)(run)滑條(tiao)件(jian)。