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發(fa)布時間(jian):2021-06-01 15:18:27 人(ren)氣:172151 來源:川工密封
隨州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。在隨州機械密封系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)中,上述系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)并不(bu)同時包括在(zai)內(nei)。密(mi)封(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)的選擇主(zhu)要取決于(yu)主(zhu)密(mi)封(feng)件的應用范圍。例如(ru),如(ru)果(guo)主(zhu)密(mi)封(feng)用于(yu)高溫(wen)液體,密(mi)封(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)應確(que)(que)保(bao)降(jiang)低主(zhu)密(mi)封(feng)的環境(jing)溫(wen)度,即采用溫(wen)度控制系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)。如(ru)果(guo)主(zhu)密(mi)封(feng)用于(yu)固體雜質(zhi)(zhi)含量高的工作(zuo)介質(zhi)(zhi),密(mi)封(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)應確(que)(que)保(bao)在(zai)主(zhu)密(mi)封(feng)前(qian)降(jiang)低固體雜質(zhi)(zhi)含量,即采用除(chu)雜系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)。在(zai)腐蝕性介質(zhi)(zhi)中,密(mi)封(feng)系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)必須確(que)(que)保(bao)主(zhu)密(mi)封(feng)降(jiang)低腐蝕速率或消(xiao)除(chu)腐蝕,即使用流(liu)體而不(bu)是堵(du)塞(sai)流(liu)體系(xi)(xi)統(tong)(tong)(tong)(tong)(tong);在(zai)高壓密(mi)封(feng)裝置中,輔助系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)應確(que)(que)保(bao)多級(ji)降(jiang)壓和其他措(cuo)施,即壓力控制系(xi)(xi)統(tong)(tong)(tong)(tong)(tong)。
隨州機械密封的三(san)個主要功(gong)能如下:
1、沖洗功能,沖洗是隨州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。一般的隨州機械密封應該沖(chong)洗,特別是(shi)對于(yu)輕烴泵,沖(chong)洗時達到隔(ge)離介質、冷卻(que)和(he)改善潤滑(hua)的(de)(de)目的(de)(de)。隔(ge)離介質的(de)(de)目的(de)(de)可以通過將與介質相容(rong)的(de)(de)液體引入密封腔進行(xing)外(wai)部循環沖(chong)洗來實(shi)現。
2、除雜和過濾功能,密封流體中的微細固體粒子、污垢等雜質對隨州機械密封造成的(de)(de)危(wei)害(hai)非常嚴(yan)重,可(ke)能導致密(mi)封端面的(de)(de)磨損(sun),也(ye)可(ke)能堵塞寒冷密(mi)封系統(tong)的(de)(de)管線。密(mi)封性系統(tong)軟件(jian)具(ju)有去(qu)除(chu)殘渣、保(bao)持液體清潔的(de)(de)作(zuo)用。當殘渣的(de)(de)相對(dui)密(mi)度小(xiao)于液體媒質(zhi)相對(dui)密(mi)度時,能用過(guo)濾(lv)裝置去(qu)除(chu)殘渣;而當殘渣的(de)(de)相對(dui)密(mi)度超(chao)過(guo)液體媒質(zhi)相對(dui)密(mi)度時,可(ke)選用旋液分(fen)離設備或網式過(guo)濾(lv)器去(qu)除(chu)殘渣。
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。借助隨州機械密封可以用雙端隨州機械密封代(dai)替密(mi)封(feng)介質,將(jiang)難(nan)以(yi)直接密(mi)封(feng)的介質轉化為(wei)密(mi)封(feng)潤滑性能好、清潔(jie)的密(mi)封(feng)液體介質。