熱(re)油泵(beng)機械(xie)密(mi)封失效的主要(yao)形式表現為(wei)：密(mi)封表面磨損，當(dang)動(dong)(dong)環(huan)(huan)(huan)為(wei)碳(tan)化(hua)鎢、靜(jing)環(huan)(huan)(huan)為(wei)石墨時(shi)，在(zai)靜(jing)環(huan)(huan)(huan)表面出(chu)(chu)現環(huan)(huan)(huan)狀溝紋(wen);當(dang)動(dong)(dong)環(huan)(huan)(huan)用碳(tan)化(hua)鎢環(huan)(huan)(huan)熱(re)裝在(zai)不銹鋼環(huan)(huan)(huan)座上時(shi)，會出(chu)(chu)現碳(tan)化(hua)鎢環(huan)(huan)(huan)松脫(tuo)的現象;在(zai)動(dong)(dong)環(huan)(huan)(huan)和軸套之間結(jie)水垢(gou)，動(dong)(dong)環(huan)(huan)(huan)不能(neng)浮動(dong)(dong);動(dong)(dong)環(huan)(huan)(huan)密(mi)封圈磨損或翻邊(用4F—V形墊(dian)制造時(shi));靜(jing)環(huan)(huan)(huan)離位等。 其主要(yao)原因是(shi)溫(wen)(wen)(wen)度(du)(du)高。高溫(wen)(wen)(wen)使(shi)密(mi)封端面內介質汽化(hua);高溫(wen)(wen)(wen)使(shi)石墨環(huan)(huan)(huan)性能(neng)下降;高溫(wen)(wen)(wen)使(shi)冷卻(que)水結(jie)垢(gou);高溫(wen)(wen)(wen)使(shi)熱(re)裝的碳(tan)化(hua)鎢環(huan)(huan)(huan)松脫(tuo);由(you)于溫(wen)(wen)(wen)度(du)(du)高，熱(re)油泵(beng)容易抽空，使(shi)熱(re)油(you)泵(beng)機械(xie)密封(feng)(feng)(feng)失效的主要(yao)形式表(biao)(biao)現為：密封(feng)(feng)(feng)表(biao)(biao)面(mian)(mian)磨損(sun)，當(dang)動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)為碳(tan)化(hua)鎢(wu)、靜環(huan)(huan)(huan)(huan)為石墨(mo)時，在(zai)靜環(huan)(huan)(huan)(huan)表(biao)(biao)面(mian)(mian)出(chu)現環(huan)(huan)(huan)(huan)狀溝紋(wen);當(dang)動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)用碳(tan)化(hua)鎢(wu)環(huan)(huan)(huan)(huan)熱(re)裝在(zai)不銹鋼環(huan)(huan)(huan)(huan)座上時，會出(chu)現碳(tan)化(hua)鎢(wu)環(huan)(huan)(huan)(huan)松脫的現象;在(zai)動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)和軸套之間結水(shui)垢，動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)不能(neng)浮動(dong)(dong)(dong);動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)密封(feng)(feng)(feng)圈(quan)(quan)磨損(sun)或翻邊(用4F—V形墊制造(zao)時);靜環(huan)(huan)(huan)(huan)離位等(deng)。 其主要(yao)原因是溫(wen)(wen)度(du)高。高溫(wen)(wen)使(shi)密封(feng)(feng)(feng)端面(mian)(mian)內介質(zhi)汽化(hua);高溫(wen)(wen)使(shi)石墨(mo)環(huan)(huan)(huan)(huan)性能(neng)下降(jiang);高溫(wen)(wen)使(shi)冷卻水(shui)結垢;高溫(wen)(wen)使(shi)熱(re)裝的碳(tan)化(hua)鎢(wu)環(huan)(huan)(huan)(huan)松脫;由(you)于溫(wen)(wen)度(du)高，熱(re)油(you)泵(beng)容易(yi)抽(chou)空，使(shi)靜環(huan)(huan)(huan)(huan)離位、動(dong)(dong)(dong)環(huan)(huan)(huan)(huan)密封(feng)(feng)(feng)圈(quan)(quan)產生翻邊等(deng)缺陷。有機械(xie)雜質(zhi)存(cun)在(zai)時，也(ye)會加劇(ju)密封(feng)(feng)(feng)面(mian)(mian)的磨損(sun)。