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發(fa)布時間:2021-06-01 15:18:27 人氣:183819 來源:川工密(mi)封
昆山機械密封包括壓力控制、溫度控制、流體替換(堵塞)和雜質去除系統。在昆山機械密封系(xi)統(tong)(tong)(tong)中,上(shang)述系(xi)統(tong)(tong)(tong)并不同時包(bao)括在內。密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系(xi)統(tong)(tong)(tong)的選擇主(zhu)要取決(jue)于主(zhu)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)件的應(ying)用(yong)(yong)范圍。例如(ru),如(ru)果(guo)主(zhu)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)用(yong)(yong)于高(gao)(gao)溫液(ye)體,密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系(xi)統(tong)(tong)(tong)應(ying)確(que)保降(jiang)低主(zhu)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)的環境溫度,即(ji)采(cai)用(yong)(yong)溫度控制系(xi)統(tong)(tong)(tong)。如(ru)果(guo)主(zhu)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)用(yong)(yong)于固(gu)體雜質(zhi)含(han)量(liang)高(gao)(gao)的工作介質(zhi),密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系(xi)統(tong)(tong)(tong)應(ying)確(que)保在主(zhu)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)前降(jiang)低固(gu)體雜質(zhi)含(han)量(liang),即(ji)采(cai)用(yong)(yong)除雜系(xi)統(tong)(tong)(tong)。在腐(fu)蝕(shi)性(xing)介質(zhi)中,密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系(xi)統(tong)(tong)(tong)必須確(que)保主(zhu)密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)降(jiang)低腐(fu)蝕(shi)速率或(huo)消除腐(fu)蝕(shi),即(ji)使用(yong)(yong)流體而不是(shi)堵塞流體系(xi)統(tong)(tong)(tong);在高(gao)(gao)壓密(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)裝置中,輔助系(xi)統(tong)(tong)(tong)應(ying)確(que)保多(duo)級降(jiang)壓和其他(ta)措施(shi),即(ji)壓力控制系(xi)統(tong)(tong)(tong)。
昆山機械密封的三(san)個主要功能如下:
1、沖洗功能,沖洗是昆山機械密封基本的功能,它直接將液體注入單面密封或雙面密封的高壓側。一般的昆山機械密封應該沖(chong)洗,特別是(shi)對于輕烴泵,沖(chong)洗時(shi)達到隔離介(jie)質、冷卻和改善潤(run)滑的(de)(de)目(mu)的(de)(de)。隔離介(jie)質的(de)(de)目(mu)的(de)(de)可以通過將與介(jie)質相容的(de)(de)液體引入密封腔進行外(wai)部(bu)循環沖(chong)洗來實現。
2、除雜和過濾功能,密封流體中的微細固體粒子、污垢等雜質對昆山機械密封造成的(de)(de)(de)危害非常嚴重,可(ke)能(neng)導(dao)致(zhi)密(mi)(mi)(mi)(mi)封端面的(de)(de)(de)磨損,也可(ke)能(neng)堵塞寒冷密(mi)(mi)(mi)(mi)封系統的(de)(de)(de)管線。密(mi)(mi)(mi)(mi)封性(xing)系統軟件具有去(qu)除殘(can)渣(zha)、保持液(ye)體清潔(jie)的(de)(de)(de)作用(yong)。當(dang)殘(can)渣(zha)的(de)(de)(de)相對(dui)密(mi)(mi)(mi)(mi)度(du)(du)小于液(ye)體媒(mei)質相對(dui)密(mi)(mi)(mi)(mi)度(du)(du)時,能(neng)用(yong)過(guo)(guo)濾(lv)裝置去(qu)除殘(can)渣(zha);而當(dang)殘(can)渣(zha)的(de)(de)(de)相對(dui)密(mi)(mi)(mi)(mi)度(du)(du)超過(guo)(guo)液(ye)體媒(mei)質相對(dui)密(mi)(mi)(mi)(mi)度(du)(du)時,可(ke)選用(yong)旋液(ye)分離(li)設(she)備(bei)或(huo)網式(shi)過(guo)(guo)濾(lv)器去(qu)除殘(can)渣(zha)。
3、流體替代功能,含有固體顆粒的氣相介質和液相介質的直接密封難度很大,它們溫、毒、貴、易蒸發、易結晶。借助昆山機械密封可以用雙端昆山機械密封代(dai)替密(mi)封(feng)(feng)介(jie)(jie)(jie)質,將難(nan)以(yi)直接密(mi)封(feng)(feng)的介(jie)(jie)(jie)質轉(zhuan)化為密(mi)封(feng)(feng)潤滑性能好(hao)、清潔的密(mi)封(feng)(feng)液(ye)體介(jie)(jie)(jie)質。