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發布時(shi)間:2021-12-17 11:55:16 人氣(qi):98734 來源:
熱水泵集式密封的大多(duo)數主要特性是(shi)其控制密封功能(neng)、摩擦力(li)、磨損和(he)(he)壽命的自動界面(mian)潤滑(hua)機理。一切(qie)取(qu)(qu)決于穿(chuan)過(guo)界面(mian)并建立潤滑(hua)膜(mo)的液體(ti)(ti)以便密封在實際無接觸,通常是(shi)混合(he)磨擦,介(jie)于干(gan)摩擦和(he)(he)完整液膜(mo)之間的潤滑(hua)摩擦狀(zhuang)態下(xia)(xia)運行。在腔(qiang)體(ti)(ti)壓(ya)(ya)力(li)作用下(xia)(xia)介(jie)質穿(chuan)過(guo)密封摩擦副端(duan)面(mian),表面(mian)張力(li)和(he)(he)離(li)心力(li)在此(ci)時影響不大,流(liu)(liu)體(ti)(ti)壓(ya)(ya)力(li)持續(xu)下(xia)(xia)降(jiang)直到(dao)它達到(dao)外部背壓(ya)(ya),此(ci)壓(ya)(ya)力(li)作用類似于流(liu)(liu)體(ti)(ti)靜(jing)壓(ya)(ya)時軸承的承載(zai)功能(neng)。這取(qu)(qu)決于介(jie)質粘度、轉速和(he)(he)端(duan)面(mian)間隙變化。
熱(re)水泵集式密(mi)(mi)封要(yao)起(qi)(qi)到(dao)靜(jing)環(huan)和(he)動(dong)(dong)(dong)環(huan)的(de)(de)(de)密(mi)(mi)封作用(yong)(yong),同(tong)時也起(qi)(qi)到(dao)浮動(dong)(dong)(dong)緩(huan)沖作用(yong)(yong),要(yao)求(qiu)靜(jing)環(huan)的(de)(de)(de)輔助密(mi)(mi)封元件能保(bao)證靜(jing)環(huan)與壓蓋之(zhi)間(jian)(jian)的(de)(de)(de)密(mi)(mi)封性和(he)靜(jing)環(huan)有(you)一定的(de)(de)(de)浮動(dong)(dong)(dong)性,動(dong)(dong)(dong)環(huan)的(de)(de)(de)輔助密(mi)(mi)封元件能保(bao)證動(dong)(dong)(dong)環(huan)與軸(zhou)與軸(zhou)套之(zhi)間(jian)(jian)的(de)(de)(de)密(mi)(mi)封性和(he)動(dong)(dong)(dong)環(huan)的(de)(de)(de)浮動(dong)(dong)(dong)性,材(cai)料要(yao)求(qiu)耐(nai)(nai)熱(re)或耐(nai)(nai)寒(han)并能與介質相(xiang)容。起(qi)(qi)到(dao)將軸(zhou)的(de)(de)(de)轉矩(ju)傳(chuan)給動(dong)(dong)(dong)環(huan)的(de)(de)(de)作用(yong)(yong),中間(jian)(jian)傳(chuan)動(dong)(dong)(dong)的(de)(de)(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)(qi)傳(chuan)動(dong)(dong)(dong)作用(yong)(yong),材(cai)料要(yao)求(qiu)耐(nai)(nai)磨(mo)和(he)耐(nai)(nai)腐蝕。
緊固件要(yao)起到靜、動環(huan)的定位(wei)(wei)、緊固和盛裝的作用,要(yao)求(qiu)定位(wei)(wei)正(zheng)確(que),保(bao)證摩擦副密(mi)(mi)封面處于正(zheng)確(que)的位(wei)(wei)置并保(bao)持良好貼合的彈簧比壓。同時(shi)要(yao)求(qiu)拆裝方便(bian)、容(rong)易就位(wei)(wei)、能重復利用。與輔(fu)助密(mi)(mi)封配(pei)合處,注意安裝密(mi)(mi)封環(huan)的導向側(ce)角和壓彈量。特別應(ying)注意動環(huan)輔(fu)助密(mi)(mi)封件與軸套配(pei)合處要(yao)求(qiu)耐腐蝕和耐磨(mo)損,必(bi)要(yao)時(shi)采用硬面復層(ceng)。
熱水(shui)泵集式密(mi)封(feng)一般配(pei)上平衡(heng)循(xun)環系(xi)統(tong),可(ke)使用在易燃、易爆(bao)、有毒及腐蝕、高(gao)真空等對密(mi)封(feng)要求更為(wei)(wei)嚴格的場合。密(mi)封(feng)結構為(wei)(wei)外沖(chong)(chong)洗結構,沖(chong)(chong)洗液(ye)可(ke)以為(wei)(wei)清潔的水(shui)也可(ke)為(wei)(wei)工(gong)業回(hui)用水(shui),密(mi)封(feng)腔(qiang)壓力高(gao)于沖(chong)(chong)洗液(ye)的壓力,沖(chong)(chong)洗液(ye)在輔(fu)助(zhu)套的上端輸(shu)入,在輔(fu)助(zhu)套的下端輸(shu)出,循(xun)環使用,密(mi)封(feng)起到冷卻沖(chong)(chong)洗的作用,其輔(fu)助(zhu)裝置有調溫器、平衡(heng)罐、強制循(xun)環平衡(heng)系(xi)統(tong)等。