發達(da)國家的(de)(de)與全(quan)球普(pu)遍是數(shu)國家的(de)(de)一(yi)般,大中型生(sheng)產發直流電機變(bian)壓器(qi)油油選取國際聯(lian)盟(meng)通用(yong)型的(de)(de)SAE規則動(dong)(dong)(dong)(dong)力(li)(li)黏度(du)(du)(du)歸(gui)類法。此(ci)法說出了0W,5W,10W,15W,20W,25W?. 20,30,40,50等1 0個(ge)動(dong)(dong)(dong)(dong)力(li)(li)黏度(du)(du)(du)行政級(ji)別。有標“W'者(zhe)提出冬(dong)日(ri)或寒帶用(yong)油,其(qi)規則的(de)(de)流性質發生(sheng)變(bian)化(hua)質有最(zui)(zui)便宜冷藏動(dong)(dong)(dong)(dong)力(li)(li)黏度(du)(du)(du)、最(zui)(zui)便宜輪(lun)廓地泵水溫和(he)100℃時的(de)(de)最(zui)(zui)便宜動(dong)(dong)(dong)(dong)力(li)(li)黏度(du)(du)(du);未標“W一(yi)者(zhe)只規則1 00℃的(de)(de)動(dong)(dong)(dong)(dong)力(li)(li)黏度(du)(du)(du)選用(yong)范圍。W類變(bian)壓器(qi)油油含(han)有較低的(de)(de)疑固點,體育動(dong)(dong)(dong)(dong)作動(dong)(dong)(dong)(dong)力(li)(li)黏度(du)(du)(du)小.W前頭(tou)大羅馬數(shu)字愈小,動(dong)(dong)(dong)(dong)力(li)(li)黏度(du)(du)(du)也(ye)愈小,選用(yong)環(huan)保水溫也(ye)愈低。未標“W”者(zhe)的(de)(de)4個(ge)等級(ji)分類,其(qi)為20~50號,體育動(dong)(dong)(dong)(dong)作動(dong)(dong)(dong)(dong)力(li)(li)黏度(du)(du)(du)比較大,可在較高(gao)的(de)(de)環(huan)保水溫下選用(yong)。大羅馬數(shu)字愈大,選用(yong)環(huan)保水溫也(ye)愈高(gao)。
相(xiang)對于那種不錯充分考(kao)慮(lv)高(gao)低(di)溫(wen)(wen)制冷(leng)(leng)的(de)效(xiao)果(guo)(guo)制冷(leng)(leng)的(de)效(xiao)果(guo)(guo)性(xing)(低(di)溫(wen)(wen)制冷(leng)(leng)的(de)效(xiao)果(guo)(guo)制冷(leng)(leng)的(de)效(xiao)果(guo)(guo)時動(dong)力粘(zhan)度指數小,而高(gao)溫(wen)(wen)環境時動(dong)力粘(zhan)度指數大(da))的(de)小火力發三(san)相(xiang)異步(bu)電機濕潤油(you)則基本(ben)概念(nian)為(wei)(wei)三(san)級濕潤油(you),如(ru)10W-30,10W-40,15W-40,15W-50, 20W-40等(deng)。它是在輕盈濕潤油(you)里調合相(xiang)應(ying)正比(bi)的(de)增粘(zhan)劑(ji)和改善效(xiao)果(guo)(guo)特點的(de)生(sheng)成(cheng)劑(ji),故又名為(wei)(wei)稠(chou)化(hua)濕潤油(you)。