機械密封是一種旋轉軸密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng),或稱旋轉機(ji)(ji)(ji)(ji)(ji)(ji)械(xie)(xie)(xie)端面密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng),于(yu)1885年(nian)(nian)(nian)在(zai)(zai)英國(guo)(guo)作為(wei)專利出現(xian),直到(dao)l900年(nian)(nian)(nian)才開始(shi)應用(yong)(yong)(yong)(yong)(yong)。1920年(nian)(nian)(nian)用(yong)(yong)(yong)(yong)(yong)于(yu)冷(leng)凍裝置,在(zai)(zai)此(ci)以前作為(wei)軸承密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng),此(ci)時(shi)機(ji)(ji)(ji)(ji)(ji)(ji)械(xie)(xie)(xie)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)的使(shi)用(yong)(yong)(yong)(yong)(yong)參(can)(can)數(shu)很低。直到(dao)1930年(nian)(nian)(nian)開始(shi)用(yong)(yong)(yong)(yong)(yong)于(yu)內燃機(ji)(ji)(ji)(ji)(ji)(ji)離心(xin)泵(beng)。1939~1945年(nian)(nian)(nian),由于(yu)石油(you)(you)化(hua)工的發(fa)展和(he)(he)(he)材料方面出現(xian)石墨、陶瓷、硬質合(he)金(jin),加工技術中(zhong)表(biao)面粗糙(cao)度(du)提(ti)高,使(shi)用(yong)(yong)(yong)(yong)(yong)參(can)(can)數(shu)有了(le)提(ti)高,機(ji)(ji)(ji)(ji)(ji)(ji)械(xie)(xie)(xie)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)在(zai)(zai)美(mei)國(guo)(guo)得到(dao)普及和(he)(he)(he)推廣(guang),并應用(yong)(yong)(yong)(yong)(yong)到(dao)石油(you)(you)和(he)(he)(he)化(hua)學(xue)工業中(zhong),出現(xian)了(le)平衡型密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)。前蘇聯在(zai)(zai)50年(nian)(nian)(nian)代(dai)中(zhong)期將機(ji)(ji)(ji)(ji)(ji)(ji)械(xie)(xie)(xie)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)用(yong)(yong)(yong)(yong)(yong)到(dao)煉油(you)(you)廠(chang)的離心(xin)油(you)(you)泵(beng)中(zhong),在(zai)(zai)我國(guo)(guo)蘭州煉油(you)(you)廠(chang)建(jian)設中(zhong),離心(xin)油(you)(you)泵(beng)中(zhong)就帶有機(ji)(ji)(ji)(ji)(ji)(ji)械(xie)(xie)(xie)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)。我國(guo)(guo)60年(nian)(nian)(nian)代(dai)初自制了(le)機(ji)(ji)(ji)(ji)(ji)(ji)械(xie)(xie)(xie)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)并推廣(guang)應用(yong)(yong)(yong)(yong)(yong),其他煉油(you)(you)廠(chang)也逐個推廣(guang)使(shi)用(yong)(yong)(yong)(yong)(yong)并作了(le)改進(jin)。60年(nian)(nian)(nian)代(dai)中(zhong)期,在(zai)(zai)引進(jin)的鉑(bo)重(zhong)整裝置中(zhong)幾乎都(dou)采用(yong)(yong)(yong)(yong)(yong)機(ji)(ji)(ji)(ji)(ji)(ji)械(xie)(xie)(xie)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng),這對(dui)煉油(you)(you)行業機(ji)(ji)(ji)(ji)(ji)(ji)械(xie)(xie)(xie)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)技術的發(fa)展有了(le)很大的幫助(zhu)。隨著我國(guo)(guo)石油(you)(you)化(hua)學(xue)工業的發(fa)展,各廠(chang)礦(kuang)、有關(guan)校、所都(dou)對(dui)機(ji)(ji)(ji)(ji)(ji)(ji)械(xie)(xie)(xie)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)進(jin)行了(le)深入研究,我國(guo)(guo)已有了(le)自己的機(ji)(ji)(ji)(ji)(ji)(ji)械(xie)(xie)(xie)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)系列,專業制造廠(chang)達近百(bai)家之多。但(dan)機(ji)(ji)(ji)(ji)(ji)(ji)械(xie)(xie)(xie)密(mi)(mi)(mi)(mi)封(feng)(feng)(feng)(feng)在(zai)(zai)結構、材料和(he)(he)(he)輔助(zhu)措施等方面還在(zai)(zai)不斷地發(fa)展和(he)(he)(he)更新。
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