熱(re)油(you)泵機(ji)械(xie)密(mi)封(feng)失效的主要(yao)形(xing)(xing)式表(biao)現(xian)為：密(mi)封(feng)表(biao)面磨(mo)損(sun)，當動(dong)環(huan)(huan)為碳(tan)化(hua)鎢(wu)(wu)、靜環(huan)(huan)為石(shi)墨時，在(zai)(zai)靜環(huan)(huan)表(biao)面出現(xian)環(huan)(huan)狀溝(gou)紋;當動(dong)環(huan)(huan)用碳(tan)化(hua)鎢(wu)(wu)環(huan)(huan)熱(re)裝(zhuang)在(zai)(zai)不(bu)銹鋼環(huan)(huan)座上時，會(hui)出現(xian)碳(tan)化(hua)鎢(wu)(wu)環(huan)(huan)松脫的現(xian)象;在(zai)(zai)動(dong)環(huan)(huan)和(he)軸套之間(jian)結水垢，動(dong)環(huan)(huan)不(bu)能浮動(dong);動(dong)環(huan)(huan)密(mi)封(feng)圈磨(mo)損(sun)或翻邊(用4F—V形(xing)(xing)墊制造(zao)時);靜環(huan)(huan)離位等(deng)。 其主要(yao)原因是溫度(du)高(gao)(gao)(gao)。高(gao)(gao)(gao)溫使(shi)密(mi)封(feng)端面內介(jie)質汽化(hua);高(gao)(gao)(gao)溫使(shi)石(shi)墨環(huan)(huan)性能下降;高(gao)(gao)(gao)溫使(shi)冷卻水結垢;高(gao)(gao)(gao)溫使(shi)熱(re)裝(zhuang)的碳(tan)化(hua)鎢(wu)(wu)環(huan)(huan)松脫;由于溫度(du)高(gao)(gao)(gao)，熱(re)油(you)泵容易抽(chou)空，使(shi)熱(re)油(you)泵(beng)(beng)機(ji)械(xie)密封失效的(de)主要形(xing)式表現為：密封表面磨(mo)損，當動(dong)環(huan)為碳化鎢(wu)、靜(jing)(jing)環(huan)為石墨時，在靜(jing)(jing)環(huan)表面出現環(huan)狀溝紋;當動(dong)環(huan)用(yong)碳化鎢(wu)環(huan)熱(re)裝(zhuang)在不銹鋼環(huan)座上時，會出現碳化鎢(wu)環(huan)松(song)(song)脫的(de)現象;在動(dong)環(huan)和軸套之間結水(shui)(shui)垢，動(dong)環(huan)不能浮動(dong);動(dong)環(huan)密封圈磨(mo)損或(huo)翻(fan)邊(用(yong)4F—V形(xing)墊制(zhi)造時);靜(jing)(jing)環(huan)離位等(deng)。 其主要原(yuan)因是溫度(du)高(gao)(gao)。高(gao)(gao)溫使(shi)(shi)密封端面內介質汽(qi)化;高(gao)(gao)溫使(shi)(shi)石墨環(huan)性能下降;高(gao)(gao)溫使(shi)(shi)冷(leng)卻水(shui)(shui)結垢;高(gao)(gao)溫使(shi)(shi)熱(re)裝(zhuang)的(de)碳化鎢(wu)環(huan)松(song)(song)脫;由于溫度(du)高(gao)(gao)，熱(re)油(you)泵(beng)(beng)容易抽空(kong)，使(shi)(shi)靜(jing)(jing)環(huan)離位、動(dong)環(huan)密封圈產生翻(fan)邊等(deng)缺陷。有機(ji)械(xie)雜質存在時，也會加劇密封面的(de)磨(mo)損。