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發布(bu)時間(jian):2021-12-17 11:55:16 人氣:98962 來(lai)源:
熱水泵(beng)集(ji)式密封(feng)的(de)大(da)多數主要特性是其控制(zhi)密封(feng)功能(neng)、摩擦力(li)、磨(mo)損和壽命(ming)的(de)自動界面(mian)潤滑(hua)機理。一切(qie)取決于穿過(guo)界面(mian)并建立潤滑(hua)膜的(de)液(ye)體以便(bian)密封(feng)在實際無接觸(chu),通(tong)常是混合磨(mo)擦,介于干摩擦和完整液(ye)膜之(zhi)間的(de)潤滑(hua)摩擦狀態下(xia)運(yun)行。在腔體壓(ya)力(li)作(zuo)用下(xia)介質(zhi)穿過(guo)密封(feng)摩擦副端(duan)面(mian),表面(mian)張力(li)和離心力(li)在此(ci)時影(ying)響不(bu)大(da),流體壓(ya)力(li)持續下(xia)降直(zhi)到它達到外部(bu)背壓(ya),此(ci)壓(ya)力(li)作(zuo)用類(lei)似于流體靜壓(ya)時軸承的(de)承載(zai)功能(neng)。這(zhe)取決于介質(zhi)粘度、轉速和端(duan)面(mian)間隙(xi)變化。
熱水泵集式(shi)密封(feng)要(yao)(yao)起(qi)到靜(jing)環(huan)和(he)動(dong)(dong)(dong)(dong)環(huan)的(de)(de)(de)(de)密封(feng)作用(yong),同時(shi)也(ye)起(qi)到浮動(dong)(dong)(dong)(dong)緩沖作用(yong),要(yao)(yao)求靜(jing)環(huan)的(de)(de)(de)(de)輔助密封(feng)元件能保證靜(jing)環(huan)與(yu)壓蓋之(zhi)(zhi)間的(de)(de)(de)(de)密封(feng)性(xing)和(he)靜(jing)環(huan)有一定的(de)(de)(de)(de)浮動(dong)(dong)(dong)(dong)性(xing),動(dong)(dong)(dong)(dong)環(huan)的(de)(de)(de)(de)輔助密封(feng)元件能保證動(dong)(dong)(dong)(dong)環(huan)與(yu)軸與(yu)軸套(tao)之(zhi)(zhi)間的(de)(de)(de)(de)密封(feng)性(xing)和(he)動(dong)(dong)(dong)(dong)環(huan)的(de)(de)(de)(de)浮動(dong)(dong)(dong)(dong)性(xing),材料(liao)要(yao)(yao)求耐(nai)熱或(huo)耐(nai)寒(han)并能與(yu)介質相容。起(qi)到將軸的(de)(de)(de)(de)轉矩傳(chuan)給動(dong)(dong)(dong)(dong)環(huan)的(de)(de)(de)(de)作用(yong),中間傳(chuan)動(dong)(dong)(dong)(dong)的(de)(de)(de)(de)傳(chuan)動(dong)(dong)(dong)(dong)銷、壓環(huan)—傳(chuan)動(dong)(dong)(dong)(dong)環(huan)、傳(chuan)動(dong)(dong)(dong)(dong)銷—彈簧座(zuo)均起(qi)傳(chuan)動(dong)(dong)(dong)(dong)作用(yong),材料(liao)要(yao)(yao)求耐(nai)磨(mo)和(he)耐(nai)腐蝕。
緊(jin)固(gu)件要(yao)(yao)起到靜、動(dong)環的(de)定位(wei)、緊(jin)固(gu)和盛裝的(de)作用(yong),要(yao)(yao)求(qiu)定位(wei)正確,保證摩擦副密(mi)(mi)封面處于正確的(de)位(wei)置(zhi)并(bing)保持良好貼合(he)的(de)彈(dan)簧比壓(ya)。同時(shi)要(yao)(yao)求(qiu)拆裝方便、容易就位(wei)、能重(zhong)復(fu)(fu)利用(yong)。與(yu)輔(fu)助(zhu)密(mi)(mi)封配(pei)合(he)處,注(zhu)意安裝密(mi)(mi)封環的(de)導向側角和壓(ya)彈(dan)量(liang)。特別(bie)應注(zhu)意動(dong)環輔(fu)助(zhu)密(mi)(mi)封件與(yu)軸套配(pei)合(he)處要(yao)(yao)求(qiu)耐腐蝕和耐磨損,必要(yao)(yao)時(shi)采用(yong)硬面復(fu)(fu)層。
熱水泵(beng)集(ji)式密封(feng)一般配上(shang)平(ping)衡(heng)(heng)循環系(xi)統(tong),可(ke)使用(yong)(yong)在易(yi)燃、易(yi)爆、有毒及(ji)腐蝕、高真空(kong)等對密封(feng)要求(qiu)更為嚴格的(de)場合。密封(feng)結(jie)構為外沖(chong)洗(xi)結(jie)構,沖(chong)洗(xi)液可(ke)以(yi)為清潔的(de)水也可(ke)為工業回用(yong)(yong)水,密封(feng)腔(qiang)壓(ya)力高于沖(chong)洗(xi)液的(de)壓(ya)力,沖(chong)洗(xi)液在輔助套的(de)上(shang)端(duan)輸入,在輔助套的(de)下端(duan)輸出(chu),循環使用(yong)(yong),密封(feng)起到冷卻沖(chong)洗(xi)的(de)作用(yong)(yong),其輔助裝置有調溫器、平(ping)衡(heng)(heng)罐(guan)、強制循環平(ping)衡(heng)(heng)系(xi)統(tong)等。