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發布時間(jian):2021-06-01 15:18:27 人氣:182929 來源:川工密封
丹江口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。在丹江口機械密封系(xi)(xi)統(tong)(tong)(tong)中(zhong)(zhong),上(shang)述系(xi)(xi)統(tong)(tong)(tong)并不同時(shi)包括(kuo)在(zai)內。密(mi)(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)的選擇主要(yao)取(qu)決(jue)于(yu)主密(mi)(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)件的應(ying)用(yong)(yong)范(fan)圍。例如,如果主密(mi)(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)用(yong)(yong)于(yu)高(gao)溫液體(ti),密(mi)(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)應(ying)確(que)保降(jiang)低主密(mi)(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)的環境溫度,即(ji)(ji)采(cai)用(yong)(yong)溫度控制系(xi)(xi)統(tong)(tong)(tong)。如果主密(mi)(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)用(yong)(yong)于(yu)固體(ti)雜(za)質含量高(gao)的工作(zuo)介質,密(mi)(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)應(ying)確(que)保在(zai)主密(mi)(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)前降(jiang)低固體(ti)雜(za)質含量,即(ji)(ji)采(cai)用(yong)(yong)除(chu)雜(za)系(xi)(xi)統(tong)(tong)(tong)。在(zai)腐蝕(shi)性介質中(zhong)(zhong),密(mi)(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)必(bi)須確(que)保主密(mi)(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)降(jiang)低腐蝕(shi)速(su)率或消除(chu)腐蝕(shi),即(ji)(ji)使用(yong)(yong)流體(ti)而(er)不是堵塞流體(ti)系(xi)(xi)統(tong)(tong)(tong);在(zai)高(gao)壓(ya)密(mi)(mi)(mi)(mi)(mi)(mi)(mi)封(feng)(feng)(feng)裝置中(zhong)(zhong),輔助系(xi)(xi)統(tong)(tong)(tong)應(ying)確(que)保多(duo)級降(jiang)壓(ya)和其他措(cuo)施,即(ji)(ji)壓(ya)力控制系(xi)(xi)統(tong)(tong)(tong)。
丹江口機械密封的(de)三個主要(yao)功(gong)能如(ru)下:
1、沖洗功能,沖洗是丹江口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。一般的丹江口機械密封應該沖(chong)(chong)洗(xi)(xi),特(te)別(bie)是對于輕烴泵,沖(chong)(chong)洗(xi)(xi)時達到隔(ge)(ge)離介(jie)質(zhi)(zhi)、冷卻和(he)改善潤滑的目的。隔(ge)(ge)離介(jie)質(zhi)(zhi)的目的可以通過將與介(jie)質(zhi)(zhi)相(xiang)容的液體引入密封(feng)腔進(jin)行外部循環沖(chong)(chong)洗(xi)(xi)來實現(xian)。
2、除雜和過濾功能,密封流體中的微細固體粒子、污垢等雜質對丹江口機械密封造成(cheng)的(de)危害非常(chang)嚴(yan)重,可能導(dao)致密(mi)(mi)(mi)(mi)封(feng)端面的(de)磨損(sun),也可能堵塞寒冷密(mi)(mi)(mi)(mi)封(feng)系統的(de)管線。密(mi)(mi)(mi)(mi)封(feng)性系統軟件(jian)具有(you)去(qu)除殘渣(zha)(zha)、保持液體(ti)清(qing)潔(jie)的(de)作用。當(dang)殘渣(zha)(zha)的(de)相(xiang)(xiang)(xiang)對密(mi)(mi)(mi)(mi)度小(xiao)于液體(ti)媒質(zhi)相(xiang)(xiang)(xiang)對密(mi)(mi)(mi)(mi)度時,能用過(guo)濾(lv)裝(zhuang)置去(qu)除殘渣(zha)(zha);而(er)當(dang)殘渣(zha)(zha)的(de)相(xiang)(xiang)(xiang)對密(mi)(mi)(mi)(mi)度超過(guo)液體(ti)媒質(zhi)相(xiang)(xiang)(xiang)對密(mi)(mi)(mi)(mi)度時,可選用旋液分離設備或(huo)網式過(guo)濾(lv)器去(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。借助丹江口機械密封可以用雙端丹江口機械密封代替密(mi)(mi)封介(jie)質,將(jiang)難以直接密(mi)(mi)封的介(jie)質轉化為密(mi)(mi)封潤滑(hua)性(xing)能好(hao)、清潔的密(mi)(mi)封液體介(jie)質。