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發(fa)布時間:2021-12-17 11:55:16 人(ren)氣:98576 來源(yuan):
熱(re)水泵集式密(mi)封(feng)的大多數主要(yao)特性是其控制密(mi)封(feng)功(gong)能(neng)、摩擦(ca)(ca)力(li)(li)(li)、磨損和壽命的自動界(jie)面潤滑(hua)機理。一切取決于(yu)穿過界(jie)面并建立潤滑(hua)膜的液體(ti)(ti)以便密(mi)封(feng)在(zai)實際無(wu)接觸(chu),通常是混合磨擦(ca)(ca),介(jie)(jie)于(yu)干摩擦(ca)(ca)和完整液膜之間(jian)(jian)的潤滑(hua)摩擦(ca)(ca)狀態下運行(xing)。在(zai)腔體(ti)(ti)壓(ya)(ya)力(li)(li)(li)作(zuo)用下介(jie)(jie)質(zhi)穿過密(mi)封(feng)摩擦(ca)(ca)副端(duan)面,表(biao)面張力(li)(li)(li)和離(li)心力(li)(li)(li)在(zai)此時影響不大,流體(ti)(ti)壓(ya)(ya)力(li)(li)(li)持續下降直(zhi)到它達到外部背壓(ya)(ya),此壓(ya)(ya)力(li)(li)(li)作(zuo)用類似于(yu)流體(ti)(ti)靜(jing)壓(ya)(ya)時軸承的承載功(gong)能(neng)。這(zhe)取決于(yu)介(jie)(jie)質(zhi)粘度(du)、轉速(su)和端(duan)面間(jian)(jian)隙變化。
熱水泵集式(shi)密(mi)封(feng)要起到(dao)(dao)靜環(huan)(huan)和動(dong)(dong)環(huan)(huan)的密(mi)封(feng)作(zuo)用(yong),同(tong)時(shi)也起到(dao)(dao)浮動(dong)(dong)緩沖(chong)作(zuo)用(yong),要求靜環(huan)(huan)的輔(fu)助密(mi)封(feng)元件能(neng)保(bao)證(zheng)靜環(huan)(huan)與壓(ya)蓋之(zhi)間的密(mi)封(feng)性和靜環(huan)(huan)有一定的浮動(dong)(dong)性,動(dong)(dong)環(huan)(huan)的輔(fu)助密(mi)封(feng)元件能(neng)保(bao)證(zheng)動(dong)(dong)環(huan)(huan)與軸(zhou)與軸(zhou)套(tao)之(zhi)間的密(mi)封(feng)性和動(dong)(dong)環(huan)(huan)的浮動(dong)(dong)性,材料要求耐(nai)熱或耐(nai)寒(han)并能(neng)與介質相(xiang)容。起到(dao)(dao)將軸(zhou)的轉矩傳(chuan)給動(dong)(dong)環(huan)(huan)的作(zuo)用(yong),中(zhong)間傳(chuan)動(dong)(dong)的傳(chuan)動(dong)(dong)銷(xiao)、壓(ya)環(huan)(huan)—傳(chuan)動(dong)(dong)環(huan)(huan)、傳(chuan)動(dong)(dong)銷(xiao)—彈簧座均(jun)起傳(chuan)動(dong)(dong)作(zuo)用(yong),材料要求耐(nai)磨和耐(nai)腐蝕。
緊固件要(yao)起(qi)到靜、動環(huan)(huan)的定位(wei)、緊固和盛裝的作用,要(yao)求定位(wei)正確(que)(que),保(bao)證摩擦副密(mi)封(feng)面處于(yu)正確(que)(que)的位(wei)置并保(bao)持良(liang)好(hao)貼合的彈簧比壓(ya)。同(tong)時要(yao)求拆裝方便(bian)、容(rong)易就位(wei)、能重復利(li)用。與輔助密(mi)封(feng)配合處,注(zhu)意(yi)安(an)裝密(mi)封(feng)環(huan)(huan)的導向側角和壓(ya)彈量。特別(bie)應注(zhu)意(yi)動環(huan)(huan)輔助密(mi)封(feng)件與軸套配合處要(yao)求耐(nai)腐(fu)蝕和耐(nai)磨損(sun),必(bi)要(yao)時采用硬面復層。
熱水(shui)(shui)泵集式密(mi)封(feng)(feng)一般配上平衡(heng)(heng)循環系統(tong),可使(shi)用在(zai)易(yi)燃(ran)、易(yi)爆、有(you)毒(du)及腐(fu)蝕(shi)、高(gao)真空等對密(mi)封(feng)(feng)要求更為(wei)嚴(yan)格的(de)(de)(de)場合。密(mi)封(feng)(feng)結(jie)構(gou)為(wei)外沖(chong)(chong)洗(xi)結(jie)構(gou),沖(chong)(chong)洗(xi)液(ye)可以(yi)為(wei)清潔的(de)(de)(de)水(shui)(shui)也可為(wei)工業回用水(shui)(shui),密(mi)封(feng)(feng)腔壓力(li)高(gao)于沖(chong)(chong)洗(xi)液(ye)的(de)(de)(de)壓力(li),沖(chong)(chong)洗(xi)液(ye)在(zai)輔(fu)(fu)助(zhu)套的(de)(de)(de)上端輸入(ru),在(zai)輔(fu)(fu)助(zhu)套的(de)(de)(de)下端輸出,循環使(shi)用,密(mi)封(feng)(feng)起到冷卻沖(chong)(chong)洗(xi)的(de)(de)(de)作(zuo)用,其輔(fu)(fu)助(zhu)裝置有(you)調溫器、平衡(heng)(heng)罐、強制循環平衡(heng)(heng)系統(tong)等。