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發布時間:2021-12-17 11:54:31 人氣:98876 來源:
在研磨過程中,閥門制造的密封面是一個常用的整理方法,可以使前鋒機械密封摩(mo)擦端面(mian)尺寸精(jing)(jing)度(du)提高(gao),閥門的(de)(de)密封面(mian),幾何粗(cu)(cu)糙度(du)和(he)表面(mian)粗(cu)(cu)糙度(du),但不(bu)能提高(gao)密封表面(mian)的(de)(de)相互位置(zhi)精(jing)(jing)度(du)。
前鋒機械密封面研磨包括五個方面的基本原理:研磨運動、研磨工藝、研磨速度、研磨壓力和研磨余量。研磨過程好一起研究密封面,隨著對前鋒機械密封研(yan)(yan)究的(de)(de)(de)復雜面(mian),之(zhi)間的(de)(de)(de)表(biao)(biao)面(mian)和(he)(he)密(mi)(mi)(mi)封(feng)(feng)磨(mo)(mo)料磨(mo)(mo)具研(yan)(yan)究相(xiang)(xiang)對(dui)運(yun)動(dong)(dong)(dong)時,密(mi)(mi)(mi)封(feng)(feng)圈表(biao)(biao)面(mian),磨(mo)(mo)料磨(mo)(mo)具研(yan)(yan)究部(bu)分(fen)(fen)和(he)(he)密(mi)(mi)(mi)封(feng)(feng)面(mian)之(zhi)間的(de)(de)(de)滑(hua)動(dong)(dong)(dong)或(huo)滾(gun)動(dong)(dong)(dong),切斷密(mi)(mi)(mi)封(feng)(feng)圈上薄薄的(de)(de)(de)一(yi)層金屬表(biao)(biao)面(mian)。密(mi)(mi)(mi)封(feng)(feng)凸峰部(bu)分(fen)(fen)的(de)(de)(de)圈,表(biao)(biao)面(mian)研(yan)(yan)磨(mo)(mo),然(ran)后逐漸達到(dao)所要(yao)求的(de)(de)(de)幾何形狀。不僅(jin)是(shi)金屬磨(mo)(mo)料的(de)(de)(de)研(yan)(yan)磨(mo)(mo)加(jia)工,以(yi)及化(hua)學(xue)作(zuo)用。研(yan)(yan)磨(mo)(mo)油可使(shi)(shi)加(jia)工表(biao)(biao)面(mian)形成的(de)(de)(de)氧化(hua)膜,從而加(jia)快研(yan)(yan)磨(mo)(mo)過程。地面(mian)運(yun)動(dong)(dong)(dong)相(xiang)(xiang)對(dui)運(yun)動(dong)(dong)(dong)的(de)(de)(de)表(biao)(biao)面(mian)和(he)(he)密(mi)(mi)(mi)封(feng)(feng)圈密(mi)(mi)(mi)封(feng)(feng)圈的(de)(de)(de)研(yan)(yan)究,對(dui)每個(ge)點的(de)(de)(de)表(biao)(biao)面(mian)上的(de)(de)(de)道路和(he)(he)相(xiang)(xiang)對(dui)滑(hua)動(dong)(dong)(dong)的(de)(de)(de)研(yan)(yan)究應該是(shi)一(yi)樣的(de)(de)(de)。和(he)(he)相(xiang)(xiang)對(dui)運(yun)動(dong)(dong)(dong)方向改變。改變密(mi)(mi)(mi)封(feng)(feng)環內(nei)的(de)(de)(de)每個(ge)粒子(zi)的(de)(de)(de)表(biao)(biao)面(mian)上運(yun)動(dong)(dong)(dong)的(de)(de)(de)方向不會(hui)重復他們(men)的(de)(de)(de)軌跡(ji),以(yi)避免磨(mo)(mo)損明顯增(zeng)加(jia)了密(mi)(mi)(mi)封(feng)(feng)環的(de)(de)(de)表(biao)(biao)面(mian)粗糙度(du)。此外,運(yun)動(dong)(dong)(dong)方向的(de)(de)(de)改變不能使(shi)(shi)磨(mo)(mo)粒分(fen)(fen)布比(bi)較均勻,且均勻切斷金屬密(mi)(mi)(mi)封(feng)(feng)環的(de)(de)(de)表(biao)(biao)面(mian)。
前鋒機械密封研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)是(shi)利用(yong)涂敷或(huo)者壓(ya)嵌(qian)游(you)離磨(mo)(mo)(mo)(mo)(mo)(mo)粒與(yu)(yu)(yu)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)劑的(de)混合(he)物(wu),在(zai)一定(ding)剛性(xing)的(de)軟質(zhi)(zhi)研(yan)(yan)(yan)(yan)具(ju)(ju)上(shang)(shang),通(tong)過(guo)研(yan)(yan)(yan)(yan)具(ju)(ju)與(yu)(yu)(yu)工件(jian)向磨(mo)(mo)(mo)(mo)(mo)(mo)料施加(jia)(jia)一定(ding)壓(ya)力(li),磨(mo)(mo)(mo)(mo)(mo)(mo)料滾動與(yu)(yu)(yu)滑動,從被(bei)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)工件(jian)上(shang)(shang)去除極(ji)薄(bo)的(de)余量,以提高(gao)工件(jian)的(de)精度和(he)降低(di)表(biao)面(mian)(mian)粗糙度值(zhi)得加(jia)(jia)工方法。按研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)時(shi)有無(wu)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)液可(ke)分為(wei)干(gan)研(yan)(yan)(yan)(yan)與(yu)(yu)(yu)濕研(yan)(yan)(yan)(yan)。研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)過(guo)程(cheng)中(zhong),在(zai)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)壓(ya)力(li)下(xia),眾(zhong)多的(de)磨(mo)(mo)(mo)(mo)(mo)(mo)料微(wei)粒進行(xing)(xing)微(wei)量切削。對(dui)工件(jian)表(biao)面(mian)(mian)進行(xing)(xing)擠壓(ya)、刻劃(hua)、滑擦;在(zai)研(yan)(yan)(yan)(yan)具(ju)(ju)運動中(zhong)當研(yan)(yan)(yan)(yan)具(ju)(ju)壓(ya)嵌(qian)的(de)磨(mo)(mo)(mo)(mo)(mo)(mo)粒脫落后及(ji)(ji)液中(zhong)磨(mo)(mo)(mo)(mo)(mo)(mo)粒相對(dui)工件(jian)發生(sheng)滾動。研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)過(guo)程(cheng)中(zhong),在(zai)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)壓(ya)力(li)的(de)作(zuo)(zuo)用(yong)下(xia),眾(zhong)多磨(mo)(mo)(mo)(mo)(mo)(mo)粒進行(xing)(xing)微(wei)量切削,同時(shi)被(bei)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)面(mian)(mian)發生(sheng)微(wei)小起伏(fu)(fu)的(de)塑性(xing)變形(xing),并且被(bei)加(jia)(jia)入的(de)諸如硬脂(zhi)(zhi)酸(suan)、油酸(suan)、脂(zhi)(zhi)肪酸(suan)等活性(xing)物(wu)質(zhi)(zhi)與(yu)(yu)(yu)被(bei)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)面(mian)(mian)起化(hua)(hua)學(xue)作(zuo)(zuo)用(yong)。隨著研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)加(jia)(jia)工的(de)進行(xing)(xing),磨(mo)(mo)(mo)(mo)(mo)(mo)具(ju)(ju)與(yu)(yu)(yu)工件(jian)表(biao)面(mian)(mian)間(jian)更趨貼(tie)近,其間(jian)充滿了(le)微(wei)屑與(yu)(yu)(yu)破碎(sui)磨(mo)(mo)(mo)(mo)(mo)(mo)料的(de)碎(sui)渣,堵(du)塞了(le)研(yan)(yan)(yan)(yan)具(ju)(ju)表(biao)面(mian)(mian),對(dui)工件(jian)表(biao)面(mian)(mian)起滑擦作(zuo)(zuo)用(yong)。所以,研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)加(jia)(jia)工的(de)實質(zhi)(zhi)是(shi)磨(mo)(mo)(mo)(mo)(mo)(mo)粒的(de)微(wei)量切削、研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)面(mian)(mian)微(wei)小起伏(fu)(fu)的(de)塑性(xing)流動、表(biao)面(mian)(mian)活性(xing)物(wu)質(zhi)(zhi)的(de)化(hua)(hua)學(xue)作(zuo)(zuo)用(yong)及(ji)(ji)研(yan)(yan)(yan)(yan)具(ju)(ju)堵(du)塞物(wu)與(yu)(yu)(yu)工件(jian)表(biao)面(mian)(mian)滑擦作(zuo)(zuo)用(yong)的(de)綜(zong)合(he)結果。
為了不讓泵水通過軸與密封間隙泄漏,由出口冷凝泵或在鹽水中的母管引至密封水。給水泵是一種具有一定溫度、高溫的水通過泵軸或泵體金屬容器用前鋒機械密封將熱(re)量傳給軸承,使軸承溫度升(sheng)高。為了控(kong)制(zhi)傳熱(re),所以密封的水也(ye)起到冷卻作用。
前鋒機械密封直接冷卻就是冷卻液體直接和密封端面接觸達到冷卻的目的。沖洗實際上也是直接冷卻的一種方式,沖洗方式中通過管路連接換熱器將冷卻后的沖洗液引入密封腔進行直接冷卻。還有一種直接冷卻就是在前鋒機械密封低壓(ya)(ya)(ya)側(ce)(大氣)將清水(shui)、蒸汽等(deng)冷(leng)(leng)卻(que)流體直接引入密(mi)封(feng)(feng)端(duan)泄露(lu)處的一(yi)種(zhong)冷(leng)(leng)卻(que)方式,也稱急(ji)冷(leng)(leng),急(ji)冷(leng)(leng)不僅冷(leng)(leng)卻(que)*,還能(neng)將密(mi)封(feng)(feng)端(duan)面周圍的雜質及泄露(lu)液(ye)帶(dai)走,急(ji)冷(leng)(leng)液(ye)其壓(ya)(ya)(ya)力比密(mi)封(feng)(feng)介質壓(ya)(ya)(ya)力低。急(ji)冷(leng)(leng)液(ye)應盡量采用軟(ruan)水(shui),以防止水(shui)垢(gou)產(chan)生破壞密(mi)封(feng)(feng)端(duan)面。當(dang)密(mi)封(feng)(feng)流體為易(yi)凝固、易(yi)結晶時,可(ke)用蒸汽、溶劑等(deng)防止流體凝結。