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發布(bu)時間:2021-12-17 11:55:16 人氣:94537 來源:
熱水(shui)泵集式密(mi)(mi)封(feng)的大(da)多數主要特性是(shi)其控制密(mi)(mi)封(feng)功(gong)能、摩擦(ca)(ca)力(li)(li)(li)、磨(mo)損和(he)壽命的自動(dong)界面(mian)潤(run)滑機理。一切取決(jue)于(yu)穿(chuan)過界面(mian)并(bing)建立潤(run)滑膜(mo)的液體以(yi)便(bian)密(mi)(mi)封(feng)在實際無接觸,通常是(shi)混合磨(mo)擦(ca)(ca),介(jie)于(yu)干摩擦(ca)(ca)和(he)完整(zheng)液膜(mo)之間的潤(run)滑摩擦(ca)(ca)狀態下(xia)運行(xing)。在腔體壓(ya)(ya)(ya)力(li)(li)(li)作(zuo)用(yong)下(xia)介(jie)質(zhi)穿(chuan)過密(mi)(mi)封(feng)摩擦(ca)(ca)副端(duan)面(mian),表面(mian)張力(li)(li)(li)和(he)離心力(li)(li)(li)在此(ci)時影(ying)響(xiang)不大(da),流體壓(ya)(ya)(ya)力(li)(li)(li)持續下(xia)降直到它達到外部背壓(ya)(ya)(ya),此(ci)壓(ya)(ya)(ya)力(li)(li)(li)作(zuo)用(yong)類似于(yu)流體靜壓(ya)(ya)(ya)時軸承(cheng)的承(cheng)載功(gong)能。這取決(jue)于(yu)介(jie)質(zhi)粘度(du)、轉(zhuan)速和(he)端(duan)面(mian)間隙(xi)變化。
熱(re)水泵(beng)集式密(mi)封(feng)(feng)要起(qi)到靜(jing)環(huan)(huan)(huan)和(he)動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)的(de)(de)密(mi)封(feng)(feng)作(zuo)用,同時也起(qi)到浮動(dong)(dong)(dong)(dong)緩沖(chong)作(zuo)用,要求靜(jing)環(huan)(huan)(huan)的(de)(de)輔(fu)助(zhu)(zhu)密(mi)封(feng)(feng)元(yuan)件能(neng)保(bao)證(zheng)靜(jing)環(huan)(huan)(huan)與壓(ya)蓋之間的(de)(de)密(mi)封(feng)(feng)性和(he)靜(jing)環(huan)(huan)(huan)有一定的(de)(de)浮動(dong)(dong)(dong)(dong)性,動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)的(de)(de)輔(fu)助(zhu)(zhu)密(mi)封(feng)(feng)元(yuan)件能(neng)保(bao)證(zheng)動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)與軸(zhou)(zhou)與軸(zhou)(zhou)套之間的(de)(de)密(mi)封(feng)(feng)性和(he)動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)的(de)(de)浮動(dong)(dong)(dong)(dong)性,材(cai)料(liao)要求耐(nai)熱(re)或耐(nai)寒(han)并能(neng)與介質相容。起(qi)到將軸(zhou)(zhou)的(de)(de)轉(zhuan)矩傳(chuan)(chuan)給動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)的(de)(de)作(zuo)用,中間傳(chuan)(chuan)動(dong)(dong)(dong)(dong)的(de)(de)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)銷、壓(ya)環(huan)(huan)(huan)—傳(chuan)(chuan)動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)、傳(chuan)(chuan)動(dong)(dong)(dong)(dong)銷—彈簧座均起(qi)傳(chuan)(chuan)動(dong)(dong)(dong)(dong)作(zuo)用,材(cai)料(liao)要求耐(nai)磨和(he)耐(nai)腐蝕(shi)。
緊(jin)固件要(yao)(yao)(yao)起到靜、動環(huan)的(de)定位、緊(jin)固和盛裝(zhuang)的(de)作用(yong),要(yao)(yao)(yao)求定位正確,保(bao)證摩擦副(fu)密封面(mian)處(chu)于正確的(de)位置并保(bao)持良好貼合(he)(he)(he)的(de)彈簧比壓。同時要(yao)(yao)(yao)求拆裝(zhuang)方便、容易就位、能(neng)重(zhong)復(fu)利(li)用(yong)。與(yu)輔(fu)助密封配(pei)合(he)(he)(he)處(chu),注意(yi)(yi)安裝(zhuang)密封環(huan)的(de)導向側(ce)角(jiao)和壓彈量(liang)。特(te)別應(ying)注意(yi)(yi)動環(huan)輔(fu)助密封件與(yu)軸(zhou)套配(pei)合(he)(he)(he)處(chu)要(yao)(yao)(yao)求耐腐蝕和耐磨損(sun),必要(yao)(yao)(yao)時采用(yong)硬面(mian)復(fu)層。
熱水泵(beng)集(ji)式密(mi)(mi)封(feng)一(yi)般配上平衡循環(huan)系(xi)統(tong),可使用在(zai)易燃、易爆(bao)、有毒及(ji)腐蝕、高真空等對密(mi)(mi)封(feng)要求更為(wei)(wei)嚴格的(de)場合。密(mi)(mi)封(feng)結構(gou)為(wei)(wei)外(wai)沖(chong)洗(xi)(xi)結構(gou),沖(chong)洗(xi)(xi)液(ye)可以為(wei)(wei)清(qing)潔的(de)水也可為(wei)(wei)工(gong)業(ye)回用水,密(mi)(mi)封(feng)腔壓力高于沖(chong)洗(xi)(xi)液(ye)的(de)壓力,沖(chong)洗(xi)(xi)液(ye)在(zai)輔助套(tao)(tao)的(de)上端輸(shu)入,在(zai)輔助套(tao)(tao)的(de)下端輸(shu)出(chu),循環(huan)使用,密(mi)(mi)封(feng)起到(dao)冷卻沖(chong)洗(xi)(xi)的(de)作用,其(qi)輔助裝置有調溫器、平衡罐、強制(zhi)循環(huan)平衡系(xi)統(tong)等。