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聯系客服,馬上詢價
發布時間:2021-12-17 11:55:16 人氣:98756 來源(yuan):
熱水泵集式密(mi)封(feng)的(de)大多數主(zhu)要(yao)特性是其(qi)控制密(mi)封(feng)功(gong)能、摩(mo)擦力(li)(li)、磨損(sun)和(he)壽命的(de)自動界(jie)面(mian)潤(run)滑(hua)機理。一切取(qu)決于穿(chuan)過(guo)界(jie)面(mian)并建立潤(run)滑(hua)膜的(de)液(ye)體以便密(mi)封(feng)在實際(ji)無(wu)接觸,通常是混(hun)合磨擦,介(jie)于干摩(mo)擦和(he)完整液(ye)膜之間的(de)潤(run)滑(hua)摩(mo)擦狀態下(xia)運行。在腔體壓(ya)力(li)(li)作用下(xia)介(jie)質穿(chuan)過(guo)密(mi)封(feng)摩(mo)擦副端面(mian),表面(mian)張力(li)(li)和(he)離心力(li)(li)在此時(shi)影響(xiang)不大,流體壓(ya)力(li)(li)持續(xu)下(xia)降直到(dao)它達(da)到(dao)外部背壓(ya),此壓(ya)力(li)(li)作用類似于流體靜壓(ya)時(shi)軸承(cheng)的(de)承(cheng)載(zai)功(gong)能。這(zhe)取(qu)決于介(jie)質粘度(du)、轉(zhuan)速和(he)端面(mian)間隙(xi)變化。
熱水(shui)泵集式密封(feng)(feng)要起(qi)(qi)到(dao)靜環(huan)(huan)(huan)(huan)和動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)的(de)(de)密封(feng)(feng)作(zuo)用(yong),同時也起(qi)(qi)到(dao)浮(fu)動(dong)(dong)(dong)(dong)緩(huan)沖作(zuo)用(yong),要求靜環(huan)(huan)(huan)(huan)的(de)(de)輔助密封(feng)(feng)元件能保證靜環(huan)(huan)(huan)(huan)與壓蓋之間(jian)(jian)的(de)(de)密封(feng)(feng)性(xing)和靜環(huan)(huan)(huan)(huan)有一定的(de)(de)浮(fu)動(dong)(dong)(dong)(dong)性(xing),動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)的(de)(de)輔助密封(feng)(feng)元件能保證動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)與軸與軸套之間(jian)(jian)的(de)(de)密封(feng)(feng)性(xing)和動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)的(de)(de)浮(fu)動(dong)(dong)(dong)(dong)性(xing),材(cai)料(liao)要求耐熱或耐寒(han)并能與介質相容。起(qi)(qi)到(dao)將軸的(de)(de)轉矩傳給動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)的(de)(de)作(zuo)用(yong),中間(jian)(jian)傳動(dong)(dong)(dong)(dong)的(de)(de)傳動(dong)(dong)(dong)(dong)銷、壓環(huan)(huan)(huan)(huan)—傳動(dong)(dong)(dong)(dong)環(huan)(huan)(huan)(huan)、傳動(dong)(dong)(dong)(dong)銷—彈(dan)簧座均起(qi)(qi)傳動(dong)(dong)(dong)(dong)作(zuo)用(yong),材(cai)料(liao)要求耐磨和耐腐蝕。
緊固件(jian)要(yao)起到靜(jing)、動環(huan)(huan)(huan)的定位(wei)、緊固和盛(sheng)裝的作用,要(yao)求(qiu)(qiu)定位(wei)正確,保證摩擦副密(mi)封面處于(yu)正確的位(wei)置并保持(chi)良好貼合的彈(dan)簧比壓(ya)。同時(shi)要(yao)求(qiu)(qiu)拆裝方便(bian)、容易就位(wei)、能重復(fu)利(li)用。與(yu)(yu)輔助(zhu)密(mi)封配(pei)合處,注(zhu)意安裝密(mi)封環(huan)(huan)(huan)的導(dao)向側角(jiao)和壓(ya)彈(dan)量。特別(bie)應注(zhu)意動環(huan)(huan)(huan)輔助(zhu)密(mi)封件(jian)與(yu)(yu)軸套配(pei)合處要(yao)求(qiu)(qiu)耐腐蝕和耐磨損,必要(yao)時(shi)采用硬面復(fu)層。
熱水(shui)泵(beng)集式密封(feng)一般配上(shang)平衡(heng)循(xun)環(huan)系統(tong),可(ke)使用(yong)在(zai)易燃、易爆、有(you)毒(du)及腐(fu)蝕、高真空等對密封(feng)要求更為(wei)嚴格的(de)(de)場合。密封(feng)結(jie)構為(wei)外沖洗結(jie)構,沖洗液(ye)可(ke)以為(wei)清(qing)潔的(de)(de)水(shui)也可(ke)為(wei)工業(ye)回(hui)用(yong)水(shui),密封(feng)腔(qiang)壓力高于沖洗液(ye)的(de)(de)壓力,沖洗液(ye)在(zai)輔助套的(de)(de)上(shang)端(duan)輸入(ru),在(zai)輔助套的(de)(de)下端(duan)輸出,循(xun)環(huan)使用(yong),密封(feng)起到冷卻沖洗的(de)(de)作用(yong),其(qi)輔助裝置有(you)調溫(wen)器、平衡(heng)罐、強制循(xun)環(huan)平衡(heng)系統(tong)等。