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發布(bu)時間(jian):2021-12-17 11:55:16 人氣:99616 來源:
熱(re)水泵集式密(mi)封的大(da)(da)多(duo)數主(zhu)要(yao)特性是(shi)其控制(zhi)密(mi)封功能、摩擦(ca)力(li)、磨損和(he)(he)壽命的自動界(jie)面(mian)潤滑(hua)機理(li)。一切(qie)取決于(yu)穿過界(jie)面(mian)并建(jian)立潤滑(hua)膜的液(ye)體以便密(mi)封在實際無接觸,通常是(shi)混合(he)磨擦(ca),介(jie)于(yu)干摩擦(ca)和(he)(he)完整(zheng)液(ye)膜之間(jian)的潤滑(hua)摩擦(ca)狀態下(xia)(xia)運行(xing)。在腔體壓力(li)作用下(xia)(xia)介(jie)質穿過密(mi)封摩擦(ca)副端(duan)面(mian),表(biao)面(mian)張力(li)和(he)(he)離(li)心力(li)在此時影響(xiang)不(bu)大(da)(da),流體壓力(li)持續下(xia)(xia)降(jiang)直(zhi)到(dao)它達(da)到(dao)外(wai)部背壓,此壓力(li)作用類似于(yu)流體靜(jing)壓時軸承(cheng)的承(cheng)載功能。這取決于(yu)介(jie)質粘度(du)、轉(zhuan)速和(he)(he)端(duan)面(mian)間(jian)隙(xi)變化。
熱(re)水泵集式密封(feng)(feng)(feng)要起(qi)到(dao)靜(jing)(jing)環(huan)(huan)和動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)的(de)密封(feng)(feng)(feng)作用(yong),同(tong)時(shi)也起(qi)到(dao)浮動(dong)(dong)(dong)(dong)(dong)緩沖作用(yong),要求靜(jing)(jing)環(huan)(huan)的(de)輔(fu)助(zhu)密封(feng)(feng)(feng)元件能(neng)保證(zheng)(zheng)靜(jing)(jing)環(huan)(huan)與壓蓋之間的(de)密封(feng)(feng)(feng)性(xing)(xing)和靜(jing)(jing)環(huan)(huan)有一定的(de)浮動(dong)(dong)(dong)(dong)(dong)性(xing)(xing),動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)的(de)輔(fu)助(zhu)密封(feng)(feng)(feng)元件能(neng)保證(zheng)(zheng)動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)與軸與軸套之間的(de)密封(feng)(feng)(feng)性(xing)(xing)和動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)的(de)浮動(dong)(dong)(dong)(dong)(dong)性(xing)(xing),材料要求耐(nai)熱(re)或(huo)耐(nai)寒并能(neng)與介質相(xiang)容。起(qi)到(dao)將軸的(de)轉矩傳(chuan)給動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)的(de)作用(yong),中間傳(chuan)動(dong)(dong)(dong)(dong)(dong)的(de)傳(chuan)動(dong)(dong)(dong)(dong)(dong)銷、壓環(huan)(huan)—傳(chuan)動(dong)(dong)(dong)(dong)(dong)環(huan)(huan)、傳(chuan)動(dong)(dong)(dong)(dong)(dong)銷—彈簧座均起(qi)傳(chuan)動(dong)(dong)(dong)(dong)(dong)作用(yong),材料要求耐(nai)磨和耐(nai)腐蝕。
緊固(gu)件要起到(dao)靜(jing)、動環(huan)的(de)定位(wei)、緊固(gu)和盛裝(zhuang)的(de)作用(yong),要求(qiu)定位(wei)正確,保證摩擦副(fu)密(mi)封(feng)(feng)面處(chu)于(yu)正確的(de)位(wei)置(zhi)并(bing)保持良好貼合(he)的(de)彈(dan)簧比壓。同時要求(qiu)拆裝(zhuang)方(fang)便、容易就(jiu)位(wei)、能重復(fu)(fu)利用(yong)。與輔助密(mi)封(feng)(feng)配(pei)合(he)處(chu),注意(yi)安裝(zhuang)密(mi)封(feng)(feng)環(huan)的(de)導向(xiang)側角和壓彈(dan)量(liang)。特別應(ying)注意(yi)動環(huan)輔助密(mi)封(feng)(feng)件與軸套配(pei)合(he)處(chu)要求(qiu)耐腐蝕和耐磨損,必要時采用(yong)硬面復(fu)(fu)層。
熱水(shui)泵(beng)集式密封一般(ban)配上平(ping)衡循環(huan)系統,可使(shi)用(yong)在(zai)易(yi)燃(ran)、易(yi)爆、有毒及腐蝕、高真空等對密封要求更為(wei)嚴格的(de)(de)場(chang)合。密封結(jie)構為(wei)外沖洗結(jie)構,沖洗液(ye)(ye)可以為(wei)清潔的(de)(de)水(shui)也可為(wei)工(gong)業回(hui)用(yong)水(shui),密封腔壓力(li)高于沖洗液(ye)(ye)的(de)(de)壓力(li),沖洗液(ye)(ye)在(zai)輔(fu)助套的(de)(de)上端(duan)輸入,在(zai)輔(fu)助套的(de)(de)下端(duan)輸出,循環(huan)使(shi)用(yong),密封起到(dao)冷卻沖洗的(de)(de)作用(yong),其輔(fu)助裝置有調溫器(qi)、平(ping)衡罐、強制循環(huan)平(ping)衡系統等。