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發布(bu)時(shi)間(jian):2021-12-16 11:39:59 人氣:100412 來源:
麗江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。在麗江機械密封系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)中(zhong)(zhong),上述系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)并不同時(shi)包(bao)括在(zai)內。密(mi)(mi)(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)的選擇主(zhu)要取決于主(zhu)密(mi)(mi)(mi)封(feng)(feng)件(jian)的應(ying)(ying)用(yong)(yong)范圍。例(li)如,如果主(zhu)密(mi)(mi)(mi)封(feng)(feng)用(yong)(yong)于高(gao)溫(wen)液體,密(mi)(mi)(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)應(ying)(ying)確(que)保(bao)降低主(zhu)密(mi)(mi)(mi)封(feng)(feng)的環境溫(wen)度,即采用(yong)(yong)溫(wen)度控制(zhi)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)。如果主(zhu)密(mi)(mi)(mi)封(feng)(feng)用(yong)(yong)于固(gu)(gu)體雜質(zhi)含量高(gao)的工作介質(zhi),密(mi)(mi)(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)應(ying)(ying)確(que)保(bao)在(zai)主(zhu)密(mi)(mi)(mi)封(feng)(feng)前降低固(gu)(gu)體雜質(zhi)含量,即采用(yong)(yong)除雜系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)。在(zai)腐蝕(shi)性介質(zhi)中(zhong)(zhong),密(mi)(mi)(mi)封(feng)(feng)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)必(bi)須(xu)確(que)保(bao)主(zhu)密(mi)(mi)(mi)封(feng)(feng)降低腐蝕(shi)速率或(huo)消(xiao)除腐蝕(shi),即使用(yong)(yong)流(liu)(liu)體而(er)不是(shi)堵塞流(liu)(liu)體系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong);在(zai)高(gao)壓密(mi)(mi)(mi)封(feng)(feng)裝置中(zhong)(zhong),輔(fu)助(zhu)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)應(ying)(ying)確(que)保(bao)多級降壓和其他措施,即壓力控制(zhi)系(xi)(xi)(xi)(xi)(xi)(xi)統(tong)(tong)。
麗江機械密封的三個主要功能如下:
1、沖洗功能,沖洗是麗江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。一般的麗江機械密封應該沖洗(xi)(xi),特別(bie)是對于輕烴泵,沖洗(xi)(xi)時(shi)達(da)到隔離介(jie)(jie)質(zhi)、冷卻和改善潤(run)滑的(de)(de)目的(de)(de)。隔離介(jie)(jie)質(zhi)的(de)(de)目的(de)(de)可以通過(guo)將與介(jie)(jie)質(zhi)相(xiang)容的(de)(de)液體(ti)引入密封腔進行外部循環沖洗(xi)(xi)來實現。
2、除雜和過濾功能,密封流體中的微細固體粒子、污垢等雜質對麗江機械密封造成的危害非常嚴重,可能(neng)導致密封(feng)端(duan)面的磨損,也(ye)可能(neng)堵塞寒冷密封(feng)系統的管線。密封(feng)性系統軟件具有去除殘(can)渣(zha)、保持液體清(qing)潔的作用。當(dang)殘(can)渣(zha)的相對密度(du)(du)小于液體媒質相對密度(du)(du)時(shi),能(neng)用過濾裝置去除殘(can)渣(zha);而(er)當(dang)殘(can)渣(zha)的相對密度(du)(du)超過液體媒質相對密度(du)(du)時(shi),可選用旋液分離(li)設備或網式(shi)過濾器去除殘(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。借助麗江機械密封可以用雙端麗江機械密封代替密(mi)封(feng)介(jie)質(zhi)(zhi)(zhi),將難(nan)以直接密(mi)封(feng)的(de)介(jie)質(zhi)(zhi)(zhi)轉(zhuan)化為密(mi)封(feng)潤(run)滑(hua)性(xing)能好、清潔的(de)密(mi)封(feng)液體介(jie)質(zhi)(zhi)(zhi)。