在潤(run)(run)滑(hua)(hua)(hua)油(you)(you)(you)(you)的(de)(de)日常使(shi)用(yong)過程(cheng)中(zhong)(zhong)，造成潤(run)(run)滑(hua)(hua)(hua)油(you)(you)(you)(you)變(bian)黑(hei)的(de)(de)原因有很(hen)多種，下(xia)面為大(da)家介紹(shao)一下(xia)潤(run)(run)滑(hua)(hua)(hua)油(you)(you)(you)(you)可能(neng)變(bian)黑(hei)的(de)(de)三個(ge)原因。（1）燃料的(de)(de)質量(liang):燃料中(zhong)(zhong)烯烴(jing)和硫(liu)的(de)(de)含量(liang)越高，就越容易產生(sheng)油(you)(you)(you)(you)泥(ni)(ni)，合肥潤(run)(run)滑(hua)(hua)(hua)油(you)(you)(you)(you)，油(you)(you)(you)(you)泥(ni)(ni)的(de)(de)出現會(hui)(hui)加(jia)(jia)(jia)快潤(run)(run)滑(hua)(hua)(hua)油(you)(you)(you)(you)變(bian)黑(hei)的(de)(de)速度。（2）發動機(ji)(ji)的(de)(de)使(shi)用(yong)情(qing)(qing)況(kuang):發動機(ji)(ji)正常使(shi)用(yong)是不會(hui)(hui)對(dui)潤(run)(run)滑(hua)(hua)(hua)油(you)(you)(you)(you)有非常大(da)的(de)(de)影(ying)響的(de)(de)，但(dan)如果發動機(ji)(ji)經常用(yong)用(yong)停(ting)停(ting)，就會(hui)(hui)加(jia)(jia)(jia)速油(you)(you)(you)(you)泥(ni)(ni)的(de)(de)產生(sheng)，同樣(yang)會(hui)(hui)加(jia)(jia)(jia)速潤(run)(run)滑(hua)(hua)(hua)油(you)(you)(you)(you)變(bian)黑(hei)的(de)(de)情(qing)(qing)況(kuang)。發動機(ji)(ji)長(chang)時間超負荷的(de)(de)工作，也會(hui)(hui)加(jia)(jia)(jia)大(da)變(bian)黑(hei)情(qing)(qing)況(kuang)的(de)(de)發生(sheng)。（3）變(bian)黑(hei)還(huan)可能(neng)由于在換機(ji)(ji)油(you)(you)(you)(you)時沒有清洗油(you)(you)(you)(you)底殼或者是機(ji)(ji)油(you)(you)(you)(you)過濾(lv)器的(de)(de)性能(neng)導致。

很(hen)多(duo)(duo)(duo)用(yong)戶在(zai)給機(ji)械(xie)加(jia)潤(run)滑(hua)油(you)(you)時(shi)(shi)總會(hui)(hui)加(jia)很(hen)多(duo)(duo)(duo)，其實，這樣做會(hui)(hui)給機(ji)械(xie)帶來很(hen)多(duo)(duo)(duo)不利影(ying)響，潤(run)滑(hua)油(you)(you)加(jia)多(duo)(duo)(duo)了(le)并不好(hao)，我(wo)們(men)一(yi)起來看一(yi)下吧。1。潤(run)滑(hua)油(you)(you)加(jia)多(duo)(duo)(duo)了(le)，機(ji)器潤(run)滑(hua)油(you)(you)多(duo)(duo)(duo)少錢(qian)，會(hui)(hui)從氣缸與活塞的間隙中竄(cuan)入燃(ran)燒室燃(ran)燒形成積炭，這些積炭會(hui)(hui)提(ti)高發動機(ji)壓縮比，增加(jia)產生爆震的傾向，還(huan)容易引(yin)起早燃(ran)，若落入汽缸內(nei)，會(hui)(hui)加(jia)劇汽缸和活塞的磨損，加(jia)速污染油(you)(you)品。2。此外，該油(you)(you)加(jia)多(duo)(duo)(duo)了(le)，會(hui)(hui)增加(jia)曲軸連桿的攪拌阻力(li)，器械(xie)潤(run)滑(hua)油(you)(you)，使(shi)燃(ran)油(you)(you)消耗增大。有(you)上(shang)述可(ke)知，我(wo)們(men)在(zai)給機(ji)械(xie)添加(jia)潤(run)滑(hua)油(you)(you)時(shi)(shi)，應(ying)控制好(hao)量，一(yi)般情況下，我(wo)們(men)會(hui)(hui)將其控制在(zai)機(ji)油(you)(you)尺的上(shang)、下刻(ke)度線之間。

常用(yong)潤滑(hua)油(you)的(de)黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)主(zhu)要有三(san)種:①動(dong)(dong)力(li)黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)(絕d對黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du))η。常用(yong)單位是Pa·s(帕(pa)·秒(miao))。②運動(dong)(dong)黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)υ。工業上常用(yong)動(dong)(dong)力(li)黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)η與同溫下該流(liu)體密(mi)度(du)(du)(du)(du)ρ的(de)比值稱(cheng)運動(dong)(dong)黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)υ，國際單位制(zhi)中運動(dong)(dong)黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)υ的(de)單位是m2/s，物理(li)單位制(zhi)中運動(dong)(dong)黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)υ的(de)單位是斯(si)(si)(St)或厘(li)斯(si)(si)(cSt)(1cm2/s稱(cheng)St)，1St=100cSt=0。0001m2/s。一般(ban)現行(xing)標準(zhun)中合(he)肥潤滑(hua)油(you)的(de)牌(pai)號(hao)(hao)是指該油(you)在40℃時運動(dong)(dong)黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)以(yi)厘(li)斯(si)(si)為(wei)單位的(de)平均(jun)值。③相對黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)(條件黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du))除(chu)運動(dong)(dong)黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)以(yi)外還經(jing)常用(yong)比較法測定液體的(de)黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)。中國用(yong)恩氏(shi)黏(nian)(nian)(nian)(nian)度(du)(du)(du)(du)，代表符號(hao)(hao)°E;美國常用(yong)塞氏(shi)通用(yong)秒(miao)，代表符號(hao)(hao)SUS。