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發布時間:2021-06-01 15:18:27 人氣:182745 來源(yuan):川工密封(feng)
富縣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。在富縣機械密封系(xi)統(tong)(tong)(tong)(tong)(tong)中,上述系(xi)統(tong)(tong)(tong)(tong)(tong)并不(bu)同時包括在內(nei)。密(mi)封(feng)(feng)系(xi)統(tong)(tong)(tong)(tong)(tong)的選擇主(zhu)要取(qu)決于主(zhu)密(mi)封(feng)(feng)件的應(ying)用范圍。例如(ru),如(ru)果主(zhu)密(mi)封(feng)(feng)用于高溫(wen)液體(ti),密(mi)封(feng)(feng)系(xi)統(tong)(tong)(tong)(tong)(tong)應(ying)確保(bao)降(jiang)低主(zhu)密(mi)封(feng)(feng)的環境溫(wen)度,即采用溫(wen)度控制(zhi)系(xi)統(tong)(tong)(tong)(tong)(tong)。如(ru)果主(zhu)密(mi)封(feng)(feng)用于固(gu)體(ti)雜質含量(liang)高的工作介質,密(mi)封(feng)(feng)系(xi)統(tong)(tong)(tong)(tong)(tong)應(ying)確保(bao)在主(zhu)密(mi)封(feng)(feng)前降(jiang)低固(gu)體(ti)雜質含量(liang),即采用除雜系(xi)統(tong)(tong)(tong)(tong)(tong)。在腐(fu)蝕(shi)性介質中,密(mi)封(feng)(feng)系(xi)統(tong)(tong)(tong)(tong)(tong)必須確保(bao)主(zhu)密(mi)封(feng)(feng)降(jiang)低腐(fu)蝕(shi)速(su)率或消(xiao)除腐(fu)蝕(shi),即使用流體(ti)而不(bu)是堵塞(sai)流體(ti)系(xi)統(tong)(tong)(tong)(tong)(tong);在高壓(ya)密(mi)封(feng)(feng)裝(zhuang)置中,輔助系(xi)統(tong)(tong)(tong)(tong)(tong)應(ying)確保(bao)多級降(jiang)壓(ya)和其他(ta)措(cuo)施(shi),即壓(ya)力控制(zhi)系(xi)統(tong)(tong)(tong)(tong)(tong)。
富縣機械密封的(de)三個(ge)主要(yao)功(gong)能如下:
1、沖洗功能,沖洗是富縣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。一般的富縣機械密封應該沖洗(xi),特別是對于輕烴(jing)泵(beng),沖洗(xi)時達到隔離(li)介質(zhi)(zhi)(zhi)、冷(leng)卻和改(gai)善潤滑(hua)的(de)目(mu)的(de)。隔離(li)介質(zhi)(zhi)(zhi)的(de)目(mu)的(de)可(ke)以通過(guo)將(jiang)與介質(zhi)(zhi)(zhi)相(xiang)容的(de)液(ye)體引(yin)入(ru)密封腔進行外部循(xun)環沖洗(xi)來實(shi)現。
2、除雜和過濾功能,密封流體中的微細固體粒子、污垢等雜質對富縣機械密封造(zao)成(cheng)的(de)(de)危害非常嚴重,可(ke)能(neng)(neng)導致密(mi)封(feng)端面(mian)的(de)(de)磨損,也(ye)可(ke)能(neng)(neng)堵塞(sai)寒冷密(mi)封(feng)系(xi)統的(de)(de)管線。密(mi)封(feng)性(xing)系(xi)統軟(ruan)件具(ju)有去除殘(can)渣(zha)、保持液體(ti)清潔的(de)(de)作用(yong)。當(dang)殘(can)渣(zha)的(de)(de)相對(dui)密(mi)度小于(yu)液體(ti)媒質相對(dui)密(mi)度時,能(neng)(neng)用(yong)過(guo)(guo)濾(lv)裝置去除殘(can)渣(zha);而當(dang)殘(can)渣(zha)的(de)(de)相對(dui)密(mi)度超過(guo)(guo)液體(ti)媒質相對(dui)密(mi)度時,可(ke)選(xuan)用(yong)旋液分離(li)設(she)備(bei)或網式過(guo)(guo)濾(lv)器去除殘(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。借助富縣機械密封可以用雙端富縣機械密封代替(ti)密封(feng)介質(zhi),將難(nan)以直(zhi)接密封(feng)的(de)(de)介質(zhi)轉化(hua)為密封(feng)潤滑性(xing)能好、清潔的(de)(de)密封(feng)液(ye)體介質(zhi)。