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發布時(shi)間:2021-12-17 11:55:16 人(ren)氣:98796 來源(yuan):
熱(re)水(shui)泵集式(shi)密封的大多數主要(yao)特性是(shi)其控制密封功(gong)(gong)能(neng)(neng)、摩擦(ca)力(li)(li)、磨(mo)損(sun)和壽(shou)命的自動界面(mian)(mian)(mian)潤(run)滑(hua)機理。一(yi)切取決于穿(chuan)過界面(mian)(mian)(mian)并建立潤(run)滑(hua)膜(mo)的液體(ti)(ti)以便密封在實際無接(jie)觸,通常是(shi)混合磨(mo)擦(ca),介(jie)(jie)(jie)于干摩擦(ca)和完(wan)整液膜(mo)之間的潤(run)滑(hua)摩擦(ca)狀態下運(yun)行(xing)。在腔體(ti)(ti)壓(ya)(ya)力(li)(li)作(zuo)用下介(jie)(jie)(jie)質(zhi)穿(chuan)過密封摩擦(ca)副(fu)端(duan)面(mian)(mian)(mian),表面(mian)(mian)(mian)張(zhang)力(li)(li)和離心力(li)(li)在此時影響不大,流體(ti)(ti)壓(ya)(ya)力(li)(li)持續(xu)下降直(zhi)到(dao)它(ta)達到(dao)外(wai)部背壓(ya)(ya),此壓(ya)(ya)力(li)(li)作(zuo)用類似(si)于流體(ti)(ti)靜壓(ya)(ya)時軸(zhou)承(cheng)的承(cheng)載功(gong)(gong)能(neng)(neng)。這取決于介(jie)(jie)(jie)質(zhi)粘度、轉速(su)和端(duan)面(mian)(mian)(mian)間隙變化。
熱(re)水(shui)泵(beng)集式密封(feng)要(yao)起(qi)到(dao)(dao)靜(jing)環(huan)和動(dong)(dong)(dong)環(huan)的(de)密封(feng)作用,同時也起(qi)到(dao)(dao)浮動(dong)(dong)(dong)緩沖作用,要(yao)求(qiu)靜(jing)環(huan)的(de)輔(fu)助密封(feng)元件(jian)能(neng)保證靜(jing)環(huan)與(yu)壓蓋之(zhi)間的(de)密封(feng)性(xing)(xing)和靜(jing)環(huan)有一定的(de)浮動(dong)(dong)(dong)性(xing)(xing),動(dong)(dong)(dong)環(huan)的(de)輔(fu)助密封(feng)元件(jian)能(neng)保證動(dong)(dong)(dong)環(huan)與(yu)軸與(yu)軸套之(zhi)間的(de)密封(feng)性(xing)(xing)和動(dong)(dong)(dong)環(huan)的(de)浮動(dong)(dong)(dong)性(xing)(xing),材料(liao)(liao)要(yao)求(qiu)耐熱(re)或耐寒并能(neng)與(yu)介質相容。起(qi)到(dao)(dao)將軸的(de)轉矩傳(chuan)給動(dong)(dong)(dong)環(huan)的(de)作用,中(zhong)間傳(chuan)動(dong)(dong)(dong)的(de)傳(chuan)動(dong)(dong)(dong)銷、壓環(huan)—傳(chuan)動(dong)(dong)(dong)環(huan)、傳(chuan)動(dong)(dong)(dong)銷—彈簧座均起(qi)傳(chuan)動(dong)(dong)(dong)作用,材料(liao)(liao)要(yao)求(qiu)耐磨和耐腐蝕。
緊固件要起(qi)到(dao)靜、動環的(de)定(ding)(ding)位(wei)(wei)(wei)、緊固和(he)盛裝(zhuang)的(de)作用(yong),要求(qiu)定(ding)(ding)位(wei)(wei)(wei)正確,保證摩擦副密封(feng)面處(chu)于正確的(de)位(wei)(wei)(wei)置并保持(chi)良好貼(tie)合(he)的(de)彈簧比(bi)壓(ya)。同時要求(qiu)拆裝(zhuang)方便、容易就位(wei)(wei)(wei)、能重復(fu)利用(yong)。與(yu)輔助密封(feng)配合(he)處(chu),注意安裝(zhuang)密封(feng)環的(de)導向側角和(he)壓(ya)彈量。特別應注意動環輔助密封(feng)件與(yu)軸(zhou)套配合(he)處(chu)要求(qiu)耐腐蝕(shi)和(he)耐磨損,必要時采用(yong)硬面復(fu)層。
熱水泵集式密封一般配上(shang)平(ping)衡循(xun)(xun)環(huan)(huan)系統,可使用在易燃、易爆、有(you)毒及腐蝕、高真空等對密封要(yao)求更為嚴格(ge)的(de)(de)(de)場合。密封結構(gou)為外沖洗(xi)結構(gou),沖洗(xi)液(ye)可以為清潔的(de)(de)(de)水也可為工業回(hui)用水,密封腔(qiang)壓(ya)力高于沖洗(xi)液(ye)的(de)(de)(de)壓(ya)力,沖洗(xi)液(ye)在輔(fu)(fu)助(zhu)套的(de)(de)(de)上(shang)端輸(shu)入,在輔(fu)(fu)助(zhu)套的(de)(de)(de)下端輸(shu)出,循(xun)(xun)環(huan)(huan)使用,密封起到冷卻沖洗(xi)的(de)(de)(de)作用,其(qi)輔(fu)(fu)助(zhu)裝置有(you)調溫器、平(ping)衡罐、強制循(xun)(xun)環(huan)(huan)平(ping)衡系統等。