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發(fa)布(bu)時間:2021-12-16 11:39:59 人(ren)氣(qi):100515 來(lai)源:
安陸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。在安陸機械密封系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)中,上述(shu)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)并不同時(shi)包括在(zai)內。密(mi)封(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)的(de)選(xuan)擇主(zhu)(zhu)(zhu)要取決(jue)于(yu)主(zhu)(zhu)(zhu)密(mi)封(feng)件的(de)應用(yong)(yong)范圍。例(li)如(ru),如(ru)果主(zhu)(zhu)(zhu)密(mi)封(feng)用(yong)(yong)于(yu)高(gao)溫(wen)液體,密(mi)封(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確保降(jiang)低(di)主(zhu)(zhu)(zhu)密(mi)封(feng)的(de)環境溫(wen)度,即(ji)采用(yong)(yong)溫(wen)度控制(zhi)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。如(ru)果主(zhu)(zhu)(zhu)密(mi)封(feng)用(yong)(yong)于(yu)固體雜質含量高(gao)的(de)工作(zuo)介(jie)質,密(mi)封(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確保在(zai)主(zhu)(zhu)(zhu)密(mi)封(feng)前降(jiang)低(di)固體雜質含量,即(ji)采用(yong)(yong)除雜系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。在(zai)腐(fu)蝕性介(jie)質中,密(mi)封(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)必須確保主(zhu)(zhu)(zhu)密(mi)封(feng)降(jiang)低(di)腐(fu)蝕速率或消除腐(fu)蝕,即(ji)使用(yong)(yong)流(liu)體而不是堵塞(sai)流(liu)體系(xi)(xi)(xi)統(tong)(tong)(tong)(tong);在(zai)高(gao)壓密(mi)封(feng)裝置中,輔助系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)應確保多級降(jiang)壓和其他措施,即(ji)壓力控制(zhi)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)。
安陸機械密封的三個主要(yao)功(gong)能如下:
1、沖洗功能,沖洗是安陸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。一般的安陸機械密封應(ying)該沖(chong)洗,特別是對于輕(qing)烴(jing)泵,沖(chong)洗時達(da)到隔離介質(zhi)、冷(leng)卻和改(gai)善潤滑的(de)目的(de)。隔離介質(zhi)的(de)目的(de)可以通過將與介質(zhi)相容的(de)液體引入(ru)密封(feng)腔進(jin)行外部循環沖(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、污垢等雜質對安陸機械密封造成的危(wei)害非常(chang)嚴重,可(ke)能導致密(mi)封端面的磨損(sun),也可(ke)能堵塞寒冷(leng)密(mi)封系統(tong)(tong)的管線。密(mi)封性系統(tong)(tong)軟件具(ju)有去(qu)除(chu)殘渣、保持液體清潔的作(zuo)用。當殘渣的相對(dui)密(mi)度(du)小于液體媒質(zhi)相對(dui)密(mi)度(du)時,能用過(guo)濾裝置去(qu)除(chu)殘渣;而當殘渣的相對(dui)密(mi)度(du)超過(guo)液體媒質(zhi)相對(dui)密(mi)度(du)時,可(ke)選用旋液分離設(she)備或(huo)網式過(guo)濾器去(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。借助安陸機械密封可以用雙端安陸機械密封代(dai)替密封(feng)介質(zhi),將難以直接密封(feng)的(de)介質(zhi)轉(zhuan)化(hua)為密封(feng)潤滑(hua)性能好、清潔(jie)的(de)密封(feng)液體介質(zhi)。