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聯系客服,馬上詢價
發(fa)布時間:2021-12-17 11:55:16 人氣(qi):98822 來(lai)源:
熱水泵集式密封(feng)的(de)大(da)多數主(zhu)要特性是其(qi)控制(zhi)密封(feng)功(gong)能(neng)(neng)、摩擦(ca)力(li)(li)(li)(li)、磨損和壽命的(de)自動(dong)界(jie)面(mian)潤(run)滑(hua)機理。一(yi)切取決于(yu)(yu)穿過界(jie)面(mian)并建立(li)潤(run)滑(hua)膜的(de)液(ye)(ye)體(ti)以便密封(feng)在實際無(wu)接觸,通常是混合(he)磨擦(ca),介于(yu)(yu)干摩擦(ca)和完整液(ye)(ye)膜之間的(de)潤(run)滑(hua)摩擦(ca)狀態下運(yun)行。在腔體(ti)壓力(li)(li)(li)(li)作用下介質(zhi)穿過密封(feng)摩擦(ca)副端(duan)(duan)面(mian),表面(mian)張力(li)(li)(li)(li)和離心力(li)(li)(li)(li)在此時(shi)(shi)影(ying)響不大(da),流體(ti)壓力(li)(li)(li)(li)持續下降直到(dao)它達到(dao)外部背壓,此壓力(li)(li)(li)(li)作用類似于(yu)(yu)流體(ti)靜壓時(shi)(shi)軸承的(de)承載功(gong)能(neng)(neng)。這取決于(yu)(yu)介質(zhi)粘度(du)、轉速和端(duan)(duan)面(mian)間隙(xi)變化(hua)。
熱水泵集式密(mi)封(feng)要(yao)(yao)(yao)起(qi)到靜(jing)環(huan)(huan)和動(dong)(dong)(dong)環(huan)(huan)的(de)密(mi)封(feng)作用(yong)(yong)(yong),同時也起(qi)到浮動(dong)(dong)(dong)緩沖作用(yong)(yong)(yong),要(yao)(yao)(yao)求靜(jing)環(huan)(huan)的(de)輔(fu)助密(mi)封(feng)元(yuan)件(jian)(jian)能保證靜(jing)環(huan)(huan)與(yu)壓(ya)蓋之間的(de)密(mi)封(feng)性和靜(jing)環(huan)(huan)有一定(ding)的(de)浮動(dong)(dong)(dong)性,動(dong)(dong)(dong)環(huan)(huan)的(de)輔(fu)助密(mi)封(feng)元(yuan)件(jian)(jian)能保證動(dong)(dong)(dong)環(huan)(huan)與(yu)軸與(yu)軸套之間的(de)密(mi)封(feng)性和動(dong)(dong)(dong)環(huan)(huan)的(de)浮動(dong)(dong)(dong)性,材料要(yao)(yao)(yao)求耐(nai)熱或耐(nai)寒并(bing)能與(yu)介質相容。起(qi)到將軸的(de)轉矩傳(chuan)(chuan)(chuan)給動(dong)(dong)(dong)環(huan)(huan)的(de)作用(yong)(yong)(yong),中間傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)的(de)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)銷、壓(ya)環(huan)(huan)—傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)環(huan)(huan)、傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)銷—彈簧座均起(qi)傳(chuan)(chuan)(chuan)動(dong)(dong)(dong)作用(yong)(yong)(yong),材料要(yao)(yao)(yao)求耐(nai)磨和耐(nai)腐蝕(shi)。
緊(jin)固件(jian)要起到靜、動環的(de)定(ding)位、緊(jin)固和盛裝的(de)作用,要求(qiu)定(ding)位正確,保證摩擦副密封(feng)面處于正確的(de)位置并保持(chi)良好貼合(he)的(de)彈簧比壓。同時(shi)要求(qiu)拆裝方便、容易就(jiu)位、能重復(fu)利用。與輔(fu)助密封(feng)配(pei)(pei)合(he)處,注意安(an)裝密封(feng)環的(de)導向側角和壓彈量。特別應注意動環輔(fu)助密封(feng)件(jian)與軸套配(pei)(pei)合(he)處要求(qiu)耐腐蝕和耐磨損,必要時(shi)采用硬面復(fu)層。
熱水泵集式密(mi)封一般配上平衡循(xun)環(huan)系(xi)統,可(ke)使用(yong)(yong)在易燃、易爆、有毒及腐蝕(shi)、高真(zhen)空等對(dui)密(mi)封要求(qiu)更為嚴(yan)格的(de)(de)場(chang)合。密(mi)封結構為外沖洗(xi)結構,沖洗(xi)液(ye)可(ke)以為清(qing)潔的(de)(de)水也(ye)可(ke)為工業回(hui)用(yong)(yong)水,密(mi)封腔壓力高于(yu)沖洗(xi)液(ye)的(de)(de)壓力,沖洗(xi)液(ye)在輔助套(tao)的(de)(de)上端(duan)輸入(ru),在輔助套(tao)的(de)(de)下端(duan)輸出,循(xun)環(huan)使用(yong)(yong),密(mi)封起到冷(leng)卻沖洗(xi)的(de)(de)作用(yong)(yong),其輔助裝置有調(diao)溫(wen)器、平衡罐、強制循(xun)環(huan)平衡系(xi)統等。