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發(fa)布時間:2021-12-16 11:39:59 人氣(qi):100396 來源(yuan):
紹興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。在紹興機械密封系(xi)統(tong)(tong)(tong)(tong)中(zhong),上述系(xi)統(tong)(tong)(tong)(tong)并(bing)不(bu)同(tong)時包(bao)括在內。密(mi)(mi)(mi)封系(xi)統(tong)(tong)(tong)(tong)的選擇主(zhu)要取決(jue)于主(zhu)密(mi)(mi)(mi)封件的應(ying)用(yong)范圍。例如,如果(guo)主(zhu)密(mi)(mi)(mi)封用(yong)于高溫(wen)(wen)液(ye)體(ti),密(mi)(mi)(mi)封系(xi)統(tong)(tong)(tong)(tong)應(ying)確(que)(que)保(bao)(bao)降低主(zhu)密(mi)(mi)(mi)封的環境溫(wen)(wen)度(du),即(ji)采用(yong)溫(wen)(wen)度(du)控制系(xi)統(tong)(tong)(tong)(tong)。如果(guo)主(zhu)密(mi)(mi)(mi)封用(yong)于固體(ti)雜質含量高的工作(zuo)介質,密(mi)(mi)(mi)封系(xi)統(tong)(tong)(tong)(tong)應(ying)確(que)(que)保(bao)(bao)在主(zhu)密(mi)(mi)(mi)封前降低固體(ti)雜質含量,即(ji)采用(yong)除雜系(xi)統(tong)(tong)(tong)(tong)。在腐蝕性介質中(zhong),密(mi)(mi)(mi)封系(xi)統(tong)(tong)(tong)(tong)必須確(que)(que)保(bao)(bao)主(zhu)密(mi)(mi)(mi)封降低腐蝕速率或(huo)消除腐蝕,即(ji)使用(yong)流體(ti)而不(bu)是堵塞流體(ti)系(xi)統(tong)(tong)(tong)(tong);在高壓密(mi)(mi)(mi)封裝置中(zhong),輔助系(xi)統(tong)(tong)(tong)(tong)應(ying)確(que)(que)保(bao)(bao)多級降壓和其(qi)他措施,即(ji)壓力控制系(xi)統(tong)(tong)(tong)(tong)。
紹興機械密封的三個(ge)主要功能如(ru)下(xia):
1、沖洗功能,沖洗是紹興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。一般的紹興機械密封應該沖洗,特(te)別是對于輕烴(jing)泵,沖洗時(shi)達到隔(ge)(ge)離(li)介質(zhi)、冷卻(que)和改(gai)善潤滑(hua)的目的。隔(ge)(ge)離(li)介質(zhi)的目的可以通過將(jiang)與(yu)介質(zhi)相容的液體引入密封腔進行外部循環沖洗來實現。
2、除雜和過濾功能,密封流體中的微細固體粒子、污垢等雜質對紹興機械密封造成的(de)(de)危(wei)害非常嚴(yan)重,可能(neng)導致(zhi)密(mi)封端面(mian)的(de)(de)磨(mo)損(sun),也可能(neng)堵塞寒冷密(mi)封系(xi)統(tong)的(de)(de)管線。密(mi)封性系(xi)統(tong)軟件具有去(qu)除(chu)殘(can)渣(zha)、保(bao)持液體(ti)(ti)清潔的(de)(de)作用。當殘(can)渣(zha)的(de)(de)相對(dui)密(mi)度(du)小于液體(ti)(ti)媒質(zhi)相對(dui)密(mi)度(du)時,能(neng)用過濾裝置去(qu)除(chu)殘(can)渣(zha);而(er)當殘(can)渣(zha)的(de)(de)相對(dui)密(mi)度(du)超過液體(ti)(ti)媒質(zhi)相對(dui)密(mi)度(du)時,可選用旋液分離設備或網式過濾器去(qu)除(chu)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。借助紹興機械密封可以用雙端紹興機械密封代替密(mi)(mi)封介質(zhi)(zhi),將難(nan)以(yi)直接(jie)密(mi)(mi)封的介質(zhi)(zhi)轉化為密(mi)(mi)封潤滑(hua)性(xing)能(neng)好、清(qing)潔的密(mi)(mi)封液體介質(zhi)(zhi)。