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發(fa)布時間:2021-12-17 11:55:16 人氣:98701 來源:
熱(re)水泵(beng)集(ji)式密封(feng)的(de)大(da)(da)多數主要特性是(shi)(shi)其控制(zhi)密封(feng)功(gong)能、摩(mo)擦(ca)(ca)力(li)、磨損和壽(shou)命(ming)的(de)自(zi)動界面(mian)潤(run)滑(hua)機理。一切取決(jue)于穿過界面(mian)并建立潤(run)滑(hua)膜(mo)的(de)液體(ti)(ti)(ti)以便密封(feng)在(zai)實際無接觸,通(tong)常是(shi)(shi)混合磨擦(ca)(ca),介于干摩(mo)擦(ca)(ca)和完整液膜(mo)之間的(de)潤(run)滑(hua)摩(mo)擦(ca)(ca)狀態下(xia)運行。在(zai)腔(qiang)體(ti)(ti)(ti)壓(ya)(ya)力(li)作用下(xia)介質穿過密封(feng)摩(mo)擦(ca)(ca)副端面(mian),表面(mian)張力(li)和離心(xin)力(li)在(zai)此(ci)時影響不大(da)(da),流(liu)體(ti)(ti)(ti)壓(ya)(ya)力(li)持續下(xia)降直到它達到外部背(bei)壓(ya)(ya),此(ci)壓(ya)(ya)力(li)作用類似于流(liu)體(ti)(ti)(ti)靜壓(ya)(ya)時軸承(cheng)的(de)承(cheng)載(zai)功(gong)能。這取決(jue)于介質粘度(du)、轉速和端面(mian)間隙(xi)變(bian)化。
熱(re)水(shui)泵集式(shi)密封(feng)要起(qi)到(dao)靜(jing)(jing)環(huan)(huan)(huan)和動(dong)(dong)環(huan)(huan)(huan)的(de)密封(feng)作(zuo)用(yong)(yong),同時(shi)也起(qi)到(dao)浮(fu)動(dong)(dong)緩沖作(zuo)用(yong)(yong),要求(qiu)靜(jing)(jing)環(huan)(huan)(huan)的(de)輔助密封(feng)元件能保(bao)證靜(jing)(jing)環(huan)(huan)(huan)與(yu)(yu)壓(ya)蓋(gai)之間的(de)密封(feng)性(xing)和靜(jing)(jing)環(huan)(huan)(huan)有一定(ding)的(de)浮(fu)動(dong)(dong)性(xing),動(dong)(dong)環(huan)(huan)(huan)的(de)輔助密封(feng)元件能保(bao)證動(dong)(dong)環(huan)(huan)(huan)與(yu)(yu)軸與(yu)(yu)軸套之間的(de)密封(feng)性(xing)和動(dong)(dong)環(huan)(huan)(huan)的(de)浮(fu)動(dong)(dong)性(xing),材料要求(qiu)耐(nai)熱(re)或耐(nai)寒并能與(yu)(yu)介質(zhi)相容。起(qi)到(dao)將軸的(de)轉矩(ju)傳(chuan)(chuan)給動(dong)(dong)環(huan)(huan)(huan)的(de)作(zuo)用(yong)(yong),中間傳(chuan)(chuan)動(dong)(dong)的(de)傳(chuan)(chuan)動(dong)(dong)銷、壓(ya)環(huan)(huan)(huan)—傳(chuan)(chuan)動(dong)(dong)環(huan)(huan)(huan)、傳(chuan)(chuan)動(dong)(dong)銷—彈(dan)簧座均起(qi)傳(chuan)(chuan)動(dong)(dong)作(zuo)用(yong)(yong),材料要求(qiu)耐(nai)磨和耐(nai)腐蝕。
緊固件要(yao)起到(dao)靜、動(dong)環(huan)(huan)的(de)定(ding)位、緊固和盛裝(zhuang)的(de)作用,要(yao)求(qiu)定(ding)位正確(que),保(bao)證(zheng)摩擦副密(mi)(mi)封面處(chu)于(yu)正確(que)的(de)位置并(bing)保(bao)持良好貼合(he)(he)(he)的(de)彈簧比壓(ya)。同(tong)時要(yao)求(qiu)拆(chai)裝(zhuang)方便、容易就位、能重復利用。與(yu)(yu)輔助(zhu)密(mi)(mi)封配(pei)合(he)(he)(he)處(chu),注(zhu)意安(an)裝(zhuang)密(mi)(mi)封環(huan)(huan)的(de)導(dao)向側角和壓(ya)彈量。特別應注(zhu)意動(dong)環(huan)(huan)輔助(zhu)密(mi)(mi)封件與(yu)(yu)軸(zhou)套配(pei)合(he)(he)(he)處(chu)要(yao)求(qiu)耐腐蝕和耐磨損,必要(yao)時采用硬面復層。
熱(re)水(shui)泵集式(shi)密(mi)封(feng)一般(ban)配上(shang)平(ping)衡(heng)循環系(xi)(xi)統,可使(shi)用在易燃、易爆、有毒及(ji)腐蝕、高真空等對密(mi)封(feng)要求(qiu)更(geng)為(wei)(wei)嚴格的場(chang)合(he)。密(mi)封(feng)結構為(wei)(wei)外沖(chong)(chong)洗結構,沖(chong)(chong)洗液(ye)可以為(wei)(wei)清潔的水(shui)也可為(wei)(wei)工業回用水(shui),密(mi)封(feng)腔(qiang)壓(ya)力高于沖(chong)(chong)洗液(ye)的壓(ya)力,沖(chong)(chong)洗液(ye)在輔(fu)(fu)助套(tao)的上(shang)端輸入,在輔(fu)(fu)助套(tao)的下端輸出,循環使(shi)用,密(mi)封(feng)起到(dao)冷卻沖(chong)(chong)洗的作用,其輔(fu)(fu)助裝置有調溫器、平(ping)衡(heng)罐、強制循環平(ping)衡(heng)系(xi)(xi)統等。