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發(fa)布時間(jian):2021-12-17 11:55:16 人氣:98816 來源:
熱(re)水(shui)泵(beng)集式密封(feng)的大多數主要特(te)性是其控制(zhi)密封(feng)功(gong)能、摩(mo)擦(ca)(ca)力(li)、磨損和壽命(ming)的自(zi)動界面(mian)潤(run)滑機理。一切取決(jue)于穿過(guo)界面(mian)并建立潤(run)滑膜(mo)的液(ye)體(ti)以便(bian)密封(feng)在實際無(wu)接觸,通常是混合磨擦(ca)(ca),介于干摩(mo)擦(ca)(ca)和完整液(ye)膜(mo)之間的潤(run)滑摩(mo)擦(ca)(ca)狀態下運行。在腔體(ti)壓(ya)(ya)力(li)作(zuo)用(yong)下介質穿過(guo)密封(feng)摩(mo)擦(ca)(ca)副端(duan)面(mian),表面(mian)張力(li)和離心力(li)在此時影響不大,流體(ti)壓(ya)(ya)力(li)持續下降直到(dao)(dao)它達到(dao)(dao)外部(bu)背壓(ya)(ya),此壓(ya)(ya)力(li)作(zuo)用(yong)類似于流體(ti)靜壓(ya)(ya)時軸承的承載功(gong)能。這取決(jue)于介質粘度、轉速和端(duan)面(mian)間隙變(bian)化。
熱水泵集(ji)式(shi)密(mi)封(feng)(feng)要(yao)起(qi)到靜環和動(dong)(dong)(dong)環的(de)密(mi)封(feng)(feng)作用(yong),同時也(ye)起(qi)到浮動(dong)(dong)(dong)緩沖作用(yong),要(yao)求(qiu)靜環的(de)輔助密(mi)封(feng)(feng)元件能(neng)保(bao)證靜環與(yu)壓蓋之間的(de)密(mi)封(feng)(feng)性(xing)和靜環有一定的(de)浮動(dong)(dong)(dong)性(xing),動(dong)(dong)(dong)環的(de)輔助密(mi)封(feng)(feng)元件能(neng)保(bao)證動(dong)(dong)(dong)環與(yu)軸(zhou)(zhou)與(yu)軸(zhou)(zhou)套之間的(de)密(mi)封(feng)(feng)性(xing)和動(dong)(dong)(dong)環的(de)浮動(dong)(dong)(dong)性(xing),材(cai)(cai)料要(yao)求(qiu)耐熱或耐寒(han)并能(neng)與(yu)介質相容。起(qi)到將軸(zhou)(zhou)的(de)轉矩傳(chuan)給(gei)動(dong)(dong)(dong)環的(de)作用(yong),中間傳(chuan)動(dong)(dong)(dong)的(de)傳(chuan)動(dong)(dong)(dong)銷、壓環—傳(chuan)動(dong)(dong)(dong)環、傳(chuan)動(dong)(dong)(dong)銷—彈(dan)簧座均起(qi)傳(chuan)動(dong)(dong)(dong)作用(yong),材(cai)(cai)料要(yao)求(qiu)耐磨和耐腐蝕。
緊固件要(yao)(yao)起到靜、動環(huan)的定位(wei)(wei)、緊固和盛裝的作(zuo)用,要(yao)(yao)求(qiu)(qiu)定位(wei)(wei)正(zheng)確,保證摩擦(ca)副(fu)密封(feng)面處于正(zheng)確的位(wei)(wei)置并保持良好貼合(he)的彈簧比壓(ya)。同(tong)時要(yao)(yao)求(qiu)(qiu)拆裝方便、容(rong)易就位(wei)(wei)、能重(zhong)復利用。與(yu)輔助密封(feng)配(pei)合(he)處,注意安裝密封(feng)環(huan)的導向(xiang)側(ce)角和壓(ya)彈量。特別(bie)應注意動環(huan)輔助密封(feng)件與(yu)軸套配(pei)合(he)處要(yao)(yao)求(qiu)(qiu)耐腐蝕和耐磨損,必要(yao)(yao)時采用硬面復層。
熱水泵集式密(mi)(mi)封(feng)一(yi)般配上(shang)平(ping)衡(heng)循環系統,可(ke)使(shi)用在(zai)易(yi)(yi)燃、易(yi)(yi)爆、有(you)毒及腐蝕、高(gao)真(zhen)空等(deng)對密(mi)(mi)封(feng)要求更為(wei)(wei)嚴格的(de)場合(he)。密(mi)(mi)封(feng)結(jie)構為(wei)(wei)外沖(chong)(chong)(chong)洗(xi)(xi)結(jie)構,沖(chong)(chong)(chong)洗(xi)(xi)液可(ke)以為(wei)(wei)清潔(jie)的(de)水也可(ke)為(wei)(wei)工業(ye)回(hui)用水,密(mi)(mi)封(feng)腔(qiang)壓(ya)力高(gao)于沖(chong)(chong)(chong)洗(xi)(xi)液的(de)壓(ya)力,沖(chong)(chong)(chong)洗(xi)(xi)液在(zai)輔(fu)助套的(de)上(shang)端(duan)輸(shu)入(ru),在(zai)輔(fu)助套的(de)下端(duan)輸(shu)出,循環使(shi)用,密(mi)(mi)封(feng)起到冷卻沖(chong)(chong)(chong)洗(xi)(xi)的(de)作用,其輔(fu)助裝置有(you)調溫(wen)器(qi)、平(ping)衡(heng)罐、強制循環平(ping)衡(heng)系統等(deng)。