熱(re)(re)(re)油泵機械密(mi)封失效的(de)主要形(xing)式表(biao)(biao)現為：密(mi)封表(biao)(biao)面(mian)磨(mo)(mo)損，當動環(huan)為碳化鎢(wu)、靜環(huan)為石墨時，在靜環(huan)表(biao)(biao)面(mian)出現環(huan)狀溝紋;當動環(huan)用碳化鎢(wu)環(huan)熱(re)(re)(re)裝(zhuang)在不銹鋼環(huan)座上時，會出現碳化鎢(wu)環(huan)松脫的(de)現象;在動環(huan)和軸(zhou)套之間結水垢(gou)，動環(huan)不能浮動;動環(huan)密(mi)封圈(quan)磨(mo)(mo)損或翻邊(用4F—V形(xing)墊制造時);靜環(huan)離(li)位等。 其主要原因是溫(wen)(wen)度(du)高。高溫(wen)(wen)使密(mi)封端(duan)面(mian)內(nei)介質汽化;高溫(wen)(wen)使石墨環(huan)性能下(xia)降;高溫(wen)(wen)使冷卻水結垢(gou);高溫(wen)(wen)使熱(re)(re)(re)裝(zhuang)的(de)碳化鎢(wu)環(huan)松脫;由于溫(wen)(wen)度(du)高，熱(re)(re)(re)油泵容(rong)易(yi)抽(chou)空，使熱(re)(re)油(you)泵機械密(mi)封(feng)失效的(de)主(zhu)要形式表(biao)現為(wei)：密(mi)封(feng)表(biao)面(mian)磨損(sun)，當(dang)動(dong)環(huan)(huan)(huan)(huan)(huan)(huan)為(wei)碳化(hua)鎢(wu)、靜(jing)(jing)(jing)環(huan)(huan)(huan)(huan)(huan)(huan)為(wei)石墨時(shi)，在靜(jing)(jing)(jing)環(huan)(huan)(huan)(huan)(huan)(huan)表(biao)面(mian)出現環(huan)(huan)(huan)(huan)(huan)(huan)狀溝紋;當(dang)動(dong)環(huan)(huan)(huan)(huan)(huan)(huan)用(yong)碳化(hua)鎢(wu)環(huan)(huan)(huan)(huan)(huan)(huan)熱(re)(re)裝在不(bu)銹鋼環(huan)(huan)(huan)(huan)(huan)(huan)座上時(shi)，會(hui)出現碳化(hua)鎢(wu)環(huan)(huan)(huan)(huan)(huan)(huan)松脫(tuo)的(de)現象(xiang);在動(dong)環(huan)(huan)(huan)(huan)(huan)(huan)和軸套之間結水(shui)垢(gou)，動(dong)環(huan)(huan)(huan)(huan)(huan)(huan)不(bu)能(neng)浮動(dong);動(dong)環(huan)(huan)(huan)(huan)(huan)(huan)密(mi)封(feng)圈磨損(sun)或(huo)翻(fan)邊(bian)(用(yong)4F—V形墊(dian)制(zhi)造(zao)時(shi));靜(jing)(jing)(jing)環(huan)(huan)(huan)(huan)(huan)(huan)離位(wei)等。 其主(zhu)要原(yuan)因是(shi)溫(wen)(wen)度高(gao)(gao)(gao)。高(gao)(gao)(gao)溫(wen)(wen)使密(mi)封(feng)端(duan)面(mian)內介質汽化(hua);高(gao)(gao)(gao)溫(wen)(wen)使石墨環(huan)(huan)(huan)(huan)(huan)(huan)性能(neng)下降(jiang);高(gao)(gao)(gao)溫(wen)(wen)使冷卻水(shui)結垢(gou);高(gao)(gao)(gao)溫(wen)(wen)使熱(re)(re)裝的(de)碳化(hua)鎢(wu)環(huan)(huan)(huan)(huan)(huan)(huan)松脫(tuo);由于溫(wen)(wen)度高(gao)(gao)(gao)，熱(re)(re)油(you)泵容易(yi)抽空，使靜(jing)(jing)(jing)環(huan)(huan)(huan)(huan)(huan)(huan)離位(wei)、動(dong)環(huan)(huan)(huan)(huan)(huan)(huan)密(mi)封(feng)圈產生翻(fan)邊(bian)等缺陷。有(you)機械雜質存(cun)在時(shi)，也會(hui)加劇(ju)密(mi)封(feng)面(mian)的(de)磨損(sun)。