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發布時間:2021-12-17 11:55:16 人氣:98597 來源(yuan):
熱水泵集式密封(feng)的(de)大多數主要特性是其控制密封(feng)功能、摩擦(ca)力(li)(li)、磨損和(he)壽命的(de)自動界(jie)面(mian)(mian)潤滑機理(li)。一切取決于(yu)(yu)穿過界(jie)面(mian)(mian)并建立潤滑膜的(de)液體(ti)(ti)(ti)以便密封(feng)在(zai)(zai)實際無接觸,通常是混合(he)磨擦(ca),介(jie)(jie)于(yu)(yu)干摩擦(ca)和(he)完整(zheng)液膜之間(jian)的(de)潤滑摩擦(ca)狀態(tai)下運行。在(zai)(zai)腔體(ti)(ti)(ti)壓力(li)(li)作用(yong)下介(jie)(jie)質穿過密封(feng)摩擦(ca)副端面(mian)(mian),表(biao)面(mian)(mian)張力(li)(li)和(he)離心力(li)(li)在(zai)(zai)此(ci)時影響不大,流(liu)體(ti)(ti)(ti)壓力(li)(li)持(chi)續(xu)下降直到它達到外部(bu)背壓,此(ci)壓力(li)(li)作用(yong)類似于(yu)(yu)流(liu)體(ti)(ti)(ti)靜壓時軸承的(de)承載(zai)功能。這取決于(yu)(yu)介(jie)(jie)質粘度(du)、轉速和(he)端面(mian)(mian)間(jian)隙變化(hua)。
熱水泵集式密(mi)封(feng)要(yao)起到(dao)靜環(huan)(huan)和動(dong)(dong)(dong)(dong)環(huan)(huan)的(de)密(mi)封(feng)作(zuo)用(yong),同時也(ye)起到(dao)浮(fu)動(dong)(dong)(dong)(dong)緩沖作(zuo)用(yong),要(yao)求(qiu)靜環(huan)(huan)的(de)輔助密(mi)封(feng)元(yuan)件能(neng)保(bao)證(zheng)靜環(huan)(huan)與(yu)壓蓋之間(jian)的(de)密(mi)封(feng)性和靜環(huan)(huan)有一定(ding)的(de)浮(fu)動(dong)(dong)(dong)(dong)性,動(dong)(dong)(dong)(dong)環(huan)(huan)的(de)輔助密(mi)封(feng)元(yuan)件能(neng)保(bao)證(zheng)動(dong)(dong)(dong)(dong)環(huan)(huan)與(yu)軸與(yu)軸套之間(jian)的(de)密(mi)封(feng)性和動(dong)(dong)(dong)(dong)環(huan)(huan)的(de)浮(fu)動(dong)(dong)(dong)(dong)性,材料要(yao)求(qiu)耐熱或耐寒并能(neng)與(yu)介質相容(rong)。起到(dao)將軸的(de)轉矩傳(chuan)給動(dong)(dong)(dong)(dong)環(huan)(huan)的(de)作(zuo)用(yong),中間(jian)傳(chuan)動(dong)(dong)(dong)(dong)的(de)傳(chuan)動(dong)(dong)(dong)(dong)銷、壓環(huan)(huan)—傳(chuan)動(dong)(dong)(dong)(dong)環(huan)(huan)、傳(chuan)動(dong)(dong)(dong)(dong)銷—彈(dan)簧座(zuo)均(jun)起傳(chuan)動(dong)(dong)(dong)(dong)作(zuo)用(yong),材料要(yao)求(qiu)耐磨和耐腐蝕。
緊固件要(yao)(yao)起(qi)到靜、動(dong)環(huan)的定(ding)位(wei)、緊固和(he)(he)盛裝(zhuang)的作(zuo)用,要(yao)(yao)求定(ding)位(wei)正(zheng)確,保(bao)證摩擦副密(mi)(mi)封(feng)面(mian)處于正(zheng)確的位(wei)置并保(bao)持良好貼合的彈(dan)簧比壓。同時要(yao)(yao)求拆裝(zhuang)方(fang)便、容(rong)易就位(wei)、能重(zhong)復(fu)利(li)用。與輔助(zhu)(zhu)密(mi)(mi)封(feng)配合處,注意(yi)安(an)裝(zhuang)密(mi)(mi)封(feng)環(huan)的導(dao)向側角和(he)(he)壓彈(dan)量。特別應注意(yi)動(dong)環(huan)輔助(zhu)(zhu)密(mi)(mi)封(feng)件與軸(zhou)套(tao)配合處要(yao)(yao)求耐(nai)腐蝕和(he)(he)耐(nai)磨(mo)損(sun),必要(yao)(yao)時采用硬(ying)面(mian)復(fu)層。
熱水(shui)泵集(ji)式密(mi)(mi)(mi)(mi)封一般配上平衡循(xun)環(huan)系(xi)統(tong),可(ke)使用(yong)(yong)(yong)在易(yi)燃、易(yi)爆、有毒及腐(fu)蝕、高真(zhen)空等對密(mi)(mi)(mi)(mi)封要求更為(wei)(wei)嚴格的(de)(de)場合。密(mi)(mi)(mi)(mi)封結(jie)構為(wei)(wei)外沖洗結(jie)構,沖洗液(ye)可(ke)以為(wei)(wei)清潔的(de)(de)水(shui)也可(ke)為(wei)(wei)工業回(hui)用(yong)(yong)(yong)水(shui),密(mi)(mi)(mi)(mi)封腔壓力(li)高于(yu)沖洗液(ye)的(de)(de)壓力(li),沖洗液(ye)在輔助套的(de)(de)上端輸入,在輔助套的(de)(de)下端輸出,循(xun)環(huan)使用(yong)(yong)(yong),密(mi)(mi)(mi)(mi)封起到冷卻沖洗的(de)(de)作用(yong)(yong)(yong),其輔助裝置有調溫器、平衡罐、強制(zhi)循(xun)環(huan)平衡系(xi)統(tong)等。