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發布時間:2021-06-01 15:18:27 人氣:178848 來源:川工密(mi)封
海陵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。在海陵機械密封系(xi)(xi)(xi)統(tong)(tong)(tong)中(zhong),上述系(xi)(xi)(xi)統(tong)(tong)(tong)并不(bu)同時包括在(zai)(zai)內。密(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)的(de)選擇主(zhu)(zhu)要取決(jue)于主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)件(jian)的(de)應用范圍。例如(ru),如(ru)果主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)用于高(gao)(gao)(gao)溫(wen)液體(ti),密(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)應確(que)保(bao)降低(di)主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)的(de)環境溫(wen)度,即采用溫(wen)度控制系(xi)(xi)(xi)統(tong)(tong)(tong)。如(ru)果主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)用于固(gu)體(ti)雜質(zhi)(zhi)含量高(gao)(gao)(gao)的(de)工作介質(zhi)(zhi),密(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)應確(que)保(bao)在(zai)(zai)主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)前降低(di)固(gu)體(ti)雜質(zhi)(zhi)含量,即采用除雜系(xi)(xi)(xi)統(tong)(tong)(tong)。在(zai)(zai)腐蝕性(xing)介質(zhi)(zhi)中(zhong),密(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)必須確(que)保(bao)主(zhu)(zhu)密(mi)(mi)封(feng)(feng)(feng)降低(di)腐蝕速率或消除腐蝕,即使用流體(ti)而不(bu)是堵(du)塞流體(ti)系(xi)(xi)(xi)統(tong)(tong)(tong);在(zai)(zai)高(gao)(gao)(gao)壓(ya)密(mi)(mi)封(feng)(feng)(feng)裝置中(zhong),輔助系(xi)(xi)(xi)統(tong)(tong)(tong)應確(que)保(bao)多級降壓(ya)和(he)其他措(cuo)施,即壓(ya)力控制系(xi)(xi)(xi)統(tong)(tong)(tong)。
海陵機械密封的三個(ge)主要功能(neng)如下(xia):
1、沖洗功能,沖洗是海陵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。一般的海陵機械密封應該沖洗,特別是對(dui)于輕烴泵(beng),沖洗時達到隔離介質、冷卻和改(gai)善潤滑的(de)目的(de)。隔離介質的(de)目的(de)可以(yi)通過將與(yu)介質相容的(de)液體引(yin)入密(mi)封腔(qiang)進(jin)行(xing)外部循環沖洗來(lai)實(shi)現(xian)。
2、除雜和過濾功能,密封流體中的微細固體粒子、污垢等雜質對海陵機械密封造成的(de)(de)危害非常嚴重,可(ke)能(neng)導致(zhi)密封(feng)(feng)端面的(de)(de)磨損,也(ye)可(ke)能(neng)堵(du)塞寒(han)冷密封(feng)(feng)系(xi)統的(de)(de)管線。密封(feng)(feng)性系(xi)統軟件具(ju)有(you)去(qu)除殘渣(zha)(zha)、保持液(ye)體(ti)清潔(jie)的(de)(de)作用(yong)(yong)(yong)。當(dang)殘渣(zha)(zha)的(de)(de)相對密度(du)(du)小于液(ye)體(ti)媒質相對密度(du)(du)時,能(neng)用(yong)(yong)(yong)過濾(lv)(lv)裝(zhuang)置去(qu)除殘渣(zha)(zha);而(er)當(dang)殘渣(zha)(zha)的(de)(de)相對密度(du)(du)超(chao)過液(ye)體(ti)媒質相對密度(du)(du)時,可(ke)選用(yong)(yong)(yong)旋液(ye)分離設(she)備或網式過濾(lv)(lv)器(qi)去(qu)除殘渣(zha)(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。借助海陵機械密封可以用雙端海陵機械密封代(dai)替(ti)密封(feng)介(jie)質,將(jiang)難以(yi)直接密封(feng)的(de)介(jie)質轉化為密封(feng)潤滑性(xing)能(neng)好、清潔的(de)密封(feng)液體介(jie)質。