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發布時間:2021-06-01 15:18:27 人氣:182198 來(lai)源:川工密封(feng)
平湖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。在平湖機械密封系(xi)(xi)統(tong)(tong)(tong)中(zhong),上(shang)述系(xi)(xi)統(tong)(tong)(tong)并不同(tong)時包括在(zai)內。密(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)(de)選擇主(zhu)(zhu)要取決于(yu)主(zhu)(zhu)密(mi)封(feng)(feng)(feng)件的(de)(de)(de)(de)應(ying)用(yong)范(fan)圍。例如(ru),如(ru)果主(zhu)(zhu)密(mi)封(feng)(feng)(feng)用(yong)于(yu)高(gao)溫液體,密(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)應(ying)確保(bao)降低(di)主(zhu)(zhu)密(mi)封(feng)(feng)(feng)的(de)(de)(de)(de)環(huan)境溫度,即(ji)(ji)采(cai)用(yong)溫度控(kong)制(zhi)系(xi)(xi)統(tong)(tong)(tong)。如(ru)果主(zhu)(zhu)密(mi)封(feng)(feng)(feng)用(yong)于(yu)固體雜(za)質含(han)量高(gao)的(de)(de)(de)(de)工(gong)作介(jie)質,密(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)應(ying)確保(bao)在(zai)主(zhu)(zhu)密(mi)封(feng)(feng)(feng)前(qian)降低(di)固體雜(za)質含(han)量,即(ji)(ji)采(cai)用(yong)除(chu)雜(za)系(xi)(xi)統(tong)(tong)(tong)。在(zai)腐(fu)蝕(shi)性(xing)介(jie)質中(zhong),密(mi)封(feng)(feng)(feng)系(xi)(xi)統(tong)(tong)(tong)必須確保(bao)主(zhu)(zhu)密(mi)封(feng)(feng)(feng)降低(di)腐(fu)蝕(shi)速率或消除(chu)腐(fu)蝕(shi),即(ji)(ji)使用(yong)流體而不是堵塞(sai)流體系(xi)(xi)統(tong)(tong)(tong);在(zai)高(gao)壓密(mi)封(feng)(feng)(feng)裝置(zhi)中(zhong),輔(fu)助系(xi)(xi)統(tong)(tong)(tong)應(ying)確保(bao)多(duo)級降壓和(he)其他措施,即(ji)(ji)壓力控(kong)制(zhi)系(xi)(xi)統(tong)(tong)(tong)。
平湖機械密封的(de)三個主要功能如下:
1、沖洗功能,沖洗是平湖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。一般的平湖機械密封應(ying)該沖(chong)洗,特別是對于輕烴泵,沖(chong)洗時達(da)到隔離介(jie)質(zhi)、冷卻和改善潤滑的(de)(de)(de)(de)目(mu)的(de)(de)(de)(de)。隔離介(jie)質(zhi)的(de)(de)(de)(de)目(mu)的(de)(de)(de)(de)可以通(tong)過將與介(jie)質(zhi)相容的(de)(de)(de)(de)液體引(yin)入密封腔(qiang)進行外部(bu)循(xun)環沖(chong)洗來實(shi)現(xian)。
2、除雜和過濾功能,密封流體中的微細固體粒子、污垢等雜質對平湖機械密封造成的(de)(de)危害非常嚴重(zhong),可(ke)能導致密(mi)封端面(mian)的(de)(de)磨損,也可(ke)能堵塞寒冷(leng)密(mi)封系(xi)統的(de)(de)管線。密(mi)封性系(xi)統軟件具(ju)有去除殘(can)(can)渣(zha)、保持(chi)液(ye)體清(qing)潔的(de)(de)作用(yong)。當殘(can)(can)渣(zha)的(de)(de)相對密(mi)度小(xiao)于液(ye)體媒質相對密(mi)度時(shi),能用(yong)過濾裝(zhuang)置去除殘(can)(can)渣(zha);而當殘(can)(can)渣(zha)的(de)(de)相對密(mi)度超過液(ye)體媒質相對密(mi)度時(shi),可(ke)選用(yong)旋(xuan)液(ye)分離設(she)備或網式過濾器去除殘(can)(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。借助平湖機械密封可以用雙端平湖機械密封代(dai)替密封(feng)介(jie)質(zhi),將難以(yi)直接密封(feng)的介(jie)質(zhi)轉化為密封(feng)潤滑性能好(hao)、清潔(jie)的密封(feng)液體介(jie)質(zhi)。