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發布時(shi)間(jian):2021-12-17 11:55:16 人(ren)氣:98732 來源:
熱水泵集式(shi)密(mi)封的(de)大(da)(da)多數主要特性是其控制密(mi)封功能(neng)、摩(mo)擦(ca)力(li)(li)、磨損和壽(shou)命的(de)自動(dong)界(jie)面(mian)(mian)潤(run)滑機理。一切(qie)取決于穿過界(jie)面(mian)(mian)并(bing)建立潤(run)滑膜的(de)液(ye)體(ti)(ti)以便密(mi)封在(zai)實際(ji)無接觸,通常是混(hun)合磨擦(ca),介于干(gan)摩(mo)擦(ca)和完整液(ye)膜之間的(de)潤(run)滑摩(mo)擦(ca)狀態下(xia)(xia)運行(xing)。在(zai)腔體(ti)(ti)壓(ya)(ya)力(li)(li)作用(yong)下(xia)(xia)介質(zhi)穿過密(mi)封摩(mo)擦(ca)副端面(mian)(mian),表面(mian)(mian)張(zhang)力(li)(li)和離心力(li)(li)在(zai)此時影響(xiang)不大(da)(da),流體(ti)(ti)壓(ya)(ya)力(li)(li)持續(xu)下(xia)(xia)降(jiang)直到(dao)它(ta)達(da)到(dao)外部背壓(ya)(ya),此壓(ya)(ya)力(li)(li)作用(yong)類似于流體(ti)(ti)靜壓(ya)(ya)時軸承的(de)承載功能(neng)。這取決于介質(zhi)粘度、轉(zhuan)速和端面(mian)(mian)間隙變化。
熱(re)水泵集式密(mi)(mi)(mi)封要(yao)(yao)起到(dao)靜(jing)環和動(dong)(dong)環的密(mi)(mi)(mi)封作用(yong)(yong),同時也起到(dao)浮動(dong)(dong)緩沖作用(yong)(yong),要(yao)(yao)求(qiu)靜(jing)環的輔助(zhu)密(mi)(mi)(mi)封元件(jian)(jian)能保(bao)證靜(jing)環與(yu)(yu)壓蓋之(zhi)間(jian)的密(mi)(mi)(mi)封性(xing)和靜(jing)環有一定的浮動(dong)(dong)性(xing),動(dong)(dong)環的輔助(zhu)密(mi)(mi)(mi)封元件(jian)(jian)能保(bao)證動(dong)(dong)環與(yu)(yu)軸與(yu)(yu)軸套之(zhi)間(jian)的密(mi)(mi)(mi)封性(xing)和動(dong)(dong)環的浮動(dong)(dong)性(xing),材(cai)(cai)料(liao)要(yao)(yao)求(qiu)耐熱(re)或耐寒并能與(yu)(yu)介質(zhi)相容。起到(dao)將(jiang)軸的轉矩傳給動(dong)(dong)環的作用(yong)(yong),中間(jian)傳動(dong)(dong)的傳動(dong)(dong)銷、壓環—傳動(dong)(dong)環、傳動(dong)(dong)銷—彈簧座均(jun)起傳動(dong)(dong)作用(yong)(yong),材(cai)(cai)料(liao)要(yao)(yao)求(qiu)耐磨和耐腐(fu)蝕。
緊(jin)固件(jian)要(yao)起到(dao)靜(jing)、動環的定(ding)位(wei)、緊(jin)固和(he)(he)盛裝的作用,要(yao)求定(ding)位(wei)正(zheng)確,保(bao)證摩(mo)擦副密(mi)封(feng)面(mian)處(chu)(chu)于正(zheng)確的位(wei)置并保(bao)持良好(hao)貼合的彈簧比(bi)壓。同(tong)時要(yao)求拆裝方便、容(rong)易就位(wei)、能重復(fu)利用。與(yu)輔助密(mi)封(feng)配(pei)合處(chu)(chu),注意(yi)安(an)裝密(mi)封(feng)環的導向側(ce)角和(he)(he)壓彈量。特別(bie)應注意(yi)動環輔助密(mi)封(feng)件(jian)與(yu)軸套配(pei)合處(chu)(chu)要(yao)求耐腐蝕和(he)(he)耐磨損,必(bi)要(yao)時采用硬面(mian)復(fu)層。
熱水(shui)泵集式密封(feng)一般配上(shang)平(ping)衡(heng)循(xun)環系統,可(ke)(ke)使(shi)(shi)用在易燃、易爆、有毒及腐蝕、高真(zhen)空等(deng)對密封(feng)要求更為嚴(yan)格的(de)場合。密封(feng)結(jie)構為外沖(chong)洗(xi)(xi)(xi)結(jie)構,沖(chong)洗(xi)(xi)(xi)液可(ke)(ke)以為清(qing)潔(jie)的(de)水(shui)也可(ke)(ke)為工業回(hui)用水(shui),密封(feng)腔壓力高于沖(chong)洗(xi)(xi)(xi)液的(de)壓力,沖(chong)洗(xi)(xi)(xi)液在輔(fu)助(zhu)套的(de)上(shang)端(duan)(duan)輸(shu)入,在輔(fu)助(zhu)套的(de)下端(duan)(duan)輸(shu)出(chu),循(xun)環使(shi)(shi)用,密封(feng)起到冷卻(que)沖(chong)洗(xi)(xi)(xi)的(de)作用,其輔(fu)助(zhu)裝(zhuang)置有調溫器、平(ping)衡(heng)罐、強制循(xun)環平(ping)衡(heng)系統等(deng)。