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發(fa)布時間:2021-12-16 11:39:59 人(ren)氣:96481 來源:
廣河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。在廣河機械密封系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)中,上述系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)并不同時包括(kuo)在(zai)內。密(mi)(mi)封系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)的(de)選擇(ze)主(zhu)要取(qu)決于主(zhu)密(mi)(mi)封件的(de)應(ying)用范(fan)圍。例如(ru),如(ru)果主(zhu)密(mi)(mi)封用于高(gao)溫(wen)液(ye)體,密(mi)(mi)封系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應(ying)確(que)保(bao)降低(di)主(zhu)密(mi)(mi)封的(de)環境溫(wen)度(du),即(ji)采(cai)用溫(wen)度(du)控制系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。如(ru)果主(zhu)密(mi)(mi)封用于固體雜質含量高(gao)的(de)工(gong)作(zuo)介(jie)質,密(mi)(mi)封系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應(ying)確(que)保(bao)在(zai)主(zhu)密(mi)(mi)封前降低(di)固體雜質含量,即(ji)采(cai)用除雜系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。在(zai)腐蝕(shi)性介(jie)質中,密(mi)(mi)封系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)必須確(que)保(bao)主(zhu)密(mi)(mi)封降低(di)腐蝕(shi)速(su)率或消除腐蝕(shi),即(ji)使用流體而不是堵(du)塞流體系(xi)(xi)(xi)統(tong)(tong)(tong)(tong);在(zai)高(gao)壓密(mi)(mi)封裝置中,輔助(zhu)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應(ying)確(que)保(bao)多(duo)級降壓和其(qi)他措施,即(ji)壓力控制系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。
廣河機械密封的三個主要功(gong)能如下:
1、沖洗功能,沖洗是廣河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。一般的廣河機械密封應該沖(chong)(chong)洗(xi),特別是對于輕烴(jing)泵,沖(chong)(chong)洗(xi)時達到隔離(li)介(jie)(jie)質、冷(leng)卻和(he)改善潤(run)滑的(de)目(mu)的(de)。隔離(li)介(jie)(jie)質的(de)目(mu)的(de)可以(yi)通過將(jiang)與介(jie)(jie)質相容(rong)的(de)液體引入(ru)密封腔進(jin)行外部(bu)循環沖(chong)(chong)洗(xi)來實現。
2、除雜和過濾功能,密封流體中的微細固體粒子、污垢等雜質對廣河機械密封造成的(de)危害非常嚴重,可能導致密(mi)(mi)封端面的(de)磨損,也可能堵塞寒(han)冷密(mi)(mi)封系統(tong)的(de)管線。密(mi)(mi)封性系統(tong)軟件具有去(qu)除殘(can)渣、保(bao)持(chi)液體(ti)清潔的(de)作用。當(dang)殘(can)渣的(de)相對(dui)密(mi)(mi)度(du)小(xiao)于液體(ti)媒質相對(dui)密(mi)(mi)度(du)時,能用過(guo)濾裝置去(qu)除殘(can)渣;而當(dang)殘(can)渣的(de)相對(dui)密(mi)(mi)度(du)超過(guo)液體(ti)媒質相對(dui)密(mi)(mi)度(du)時,可選用旋液分(fen)離設(she)備或網(wang)式過(guo)濾器(qi)去(qu)除殘(can)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。借助廣河機械密封可以用雙端廣河機械密封代替密(mi)(mi)封介(jie)質(zhi),將(jiang)難以直接密(mi)(mi)封的介(jie)質(zhi)轉化為密(mi)(mi)封潤(run)滑性能好、清潔的密(mi)(mi)封液體介(jie)質(zhi)。