屋頂風機的起動調試:
屋(wu)頂風(feng)機(ji)可(ke)用于建筑物(wu)屋(wu)頂的(de)(de)通(tong)(tong)風(feng)和(he)通(tong)(tong)風(feng)。本著室內(nei)熱氣(qi)流上(shang)升,冷空氣(qi)下(xia)降的(de)(de)天然原理,將其安(an)(an)裝在(zai)屋(wu)頂上(shang),以加快熱空氣(qi)的(de)(de)揮發,到達通(tong)(tong)風(feng)降溫(wen)的(de)(de)作用。適用于大型商業(ye)(ye)超市,農(nong)牧(mu)業(ye)(ye),工業(ye)(ye)廠房,農(nong)業(ye)(ye)育種廠和(he)元件廠;它的(de)(de)特(te)點(dian):風(feng)機(ji)不需要消(xiao)耗功(gong)率,僅通(tong)(tong)過氣(qi)流的(de)(de)功(gong)率就可(ke)以到達排風(feng)和(he)通(tong)(tong)風(feng)的(de)(de)意圖。這種風(feng)機(ji)的(de)(de)是易于安(an)(an)裝和(he)節能(neng)。
風機答(da)應全(quan)(quan)壓(ya)(ya)(ya)起(qi)(qi)動(dong)(dong)或降壓(ya)(ya)(ya)起(qi)(qi)動(dong)(dong),但(dan)應留(liu)意(yi),全(quan)(quan)壓(ya)(ya)(ya)起(qi)(qi)動(dong)(dong)時(shi)的電流(liu)為5~7倍的額定電流(liu),降壓(ya)(ya)(ya)起(qi)(qi)動(dong)(dong)轉距與電壓(ya)(ya)(ya)平方成正比,當電網容量不(bu)足時(shi),應選用降壓(ya)(ya)(ya)起(qi)(qi)動(dong)(dong)。
2.試車時人(ren)數(shu)不(bu)少于兩(liang)人(ren),一(yi)人(ren)控(kong)制電(dian)(dian)源,一(yi)人(ren)調查風機(ji)工作(zuo)狀況,發現異常(chang)(chang)現象(xiang)立(li)即停機(ji)查看;首(shou)先查看旋(xuan)轉方(fang)向是(shi)否(fou)(fou)正(zheng)確;風機(ji)過程中,應(ying)(ying)查看各相工作(zuo)電(dian)(dian)流(liu)是(shi)否(fou)(fou)平(ping)衡,電(dian)(dian)流(liu)是(shi)否(fou)(fou)超越額定電(dian)(dian)流(liu);若有不(bu)正(zheng)常(chang)(chang)現象(xiang),應(ying)(ying)中止查看。工作(zuo)五(wu)分(fen)鐘后,停機(ji)查看風機(ji)是(shi)否(fou)(fou)有異常(chang)(chang)現象(xiang),承認無異常(chang)(chang)現象(xiang)再開(kai)機(ji)工作(zuo)。
3.雙速風(feng)機試(shi)車時(shi),應先發動低速,并(bing)查(cha)看旋轉(zhuan)方向是否正(zheng)確(que);起(qi)(qi)動高速時(shi)要待風(feng)機靜止后再起(qi)(qi),以(yi)防高速反(fan)向旋轉(zhuan),引起(qi)(qi)開(kai)關(guan)跳閘及電機受損。
4.風(feng)機到達(da)正常運速時,應(ying)檢測風(feng)機各(ge)相輸(shu)入(ru)電(dian)(dian)(dian)源是否正常,風(feng)機的(de)工作(zuo)電(dian)(dian)(dian)流(liu)(liu)不能超越其額定電(dian)(dian)(dian)流(liu)(liu),若工作(zuo)電(dian)(dian)(dian)流(liu)(liu)超越其額定電(dian)(dian)(dian)流(liu)(liu),應(ying)查看(kan)供(gong)應(ying)風(feng)機的(de)電(dian)(dian)(dian)壓是否正常。
5.對離心風(feng)(feng)機(ji)和風(feng)(feng)機(ji)箱,所需(xu)電(dian)(dian)機(ji)功率(lv)是指在待定工況下(xia),加上機(ji)械損失與應有(you)的(de)(de)儲備量而言(yan),并非出風(feng)(feng)口(kou)全開時所需(xu)的(de)(de)功率(lv),如(ru)風(feng)(feng)機(ji)的(de)(de)出風(feng)(feng)口(kou)不(bu)接管道或未加外界阻(zu)力而進行空(kong)工作,則(ze)電(dian)(dian)機(ji)有(you)焚毀的(de)(de)風(feng)(feng)險,為(wei)了(le)起見,應在風(feng)(feng)機(ji)的(de)(de)出風(feng)(feng)口(kou)或入口(kou)管路加上閥門,起動風(feng)(feng)機(ji)時關閉(bi),工作后(hou)將閥門漸漸敞開,到達規(gui)則(ze)工況為(wei)止,并留意風(feng)(feng)機(ji)電(dian)(dian)流是否(fou)超越規(gui)則(ze)值。