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發(fa)布時間(jian):2021-12-17 11:54:31 人氣:98909 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,可以使德清機械密封摩擦(ca)端面尺寸精(jing)度(du)(du)提(ti)高(gao),閥門(men)的密封(feng)面,幾何粗(cu)糙度(du)(du)和表面粗(cu)糙度(du)(du),但(dan)不能提(ti)高(gao)密封(feng)表面的相互位(wei)置(zhi)精(jing)度(du)(du)。
德清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,隨著對德清機械密封研(yan)究(jiu)(jiu)的(de)(de)(de)復(fu)雜(za)面(mian)(mian)(mian)(mian),之間(jian)的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)(mian)和(he)(he)密封(feng)(feng)磨(mo)料磨(mo)具(ju)(ju)研(yan)究(jiu)(jiu)相對運(yun)動(dong)時(shi),密封(feng)(feng)圈(quan)(quan)表(biao)(biao)面(mian)(mian)(mian)(mian),磨(mo)料磨(mo)具(ju)(ju)研(yan)究(jiu)(jiu)部(bu)分(fen)(fen)和(he)(he)密封(feng)(feng)面(mian)(mian)(mian)(mian)之間(jian)的(de)(de)(de)滑動(dong)或滾動(dong),切(qie)斷密封(feng)(feng)圈(quan)(quan)上(shang)(shang)薄薄的(de)(de)(de)一層金屬(shu)表(biao)(biao)面(mian)(mian)(mian)(mian)。密封(feng)(feng)凸峰部(bu)分(fen)(fen)的(de)(de)(de)圈(quan)(quan),表(biao)(biao)面(mian)(mian)(mian)(mian)研(yan)磨(mo),然后逐漸達到所要(yao)求的(de)(de)(de)幾何形狀。不(bu)僅是金屬(shu)磨(mo)料的(de)(de)(de)研(yan)磨(mo)加(jia)(jia)(jia)工,以及化學作(zuo)用。研(yan)磨(mo)油可使(shi)加(jia)(jia)(jia)工表(biao)(biao)面(mian)(mian)(mian)(mian)形成的(de)(de)(de)氧(yang)化膜(mo),從而加(jia)(jia)(jia)快研(yan)磨(mo)過程。地面(mian)(mian)(mian)(mian)運(yun)動(dong)相對運(yun)動(dong)的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)(mian)和(he)(he)密封(feng)(feng)圈(quan)(quan)密封(feng)(feng)圈(quan)(quan)的(de)(de)(de)研(yan)究(jiu)(jiu),對每(mei)個點的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)(mian)上(shang)(shang)的(de)(de)(de)道路和(he)(he)相對滑動(dong)的(de)(de)(de)研(yan)究(jiu)(jiu)應該(gai)是一樣的(de)(de)(de)。和(he)(he)相對運(yun)動(dong)方向改變。改變密封(feng)(feng)環內的(de)(de)(de)每(mei)個粒子的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)(mian)上(shang)(shang)運(yun)動(dong)的(de)(de)(de)方向不(bu)會(hui)重復(fu)他(ta)們的(de)(de)(de)軌跡,以避免(mian)磨(mo)損明顯增加(jia)(jia)(jia)了密封(feng)(feng)環的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)(mian)粗糙度。此外,運(yun)動(dong)方向的(de)(de)(de)改變不(bu)能使(shi)磨(mo)粒分(fen)(fen)布比(bi)較均勻,且均勻切(qie)斷金屬(shu)密封(feng)(feng)環的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)(mian)。
德清機械密封研(yan)(yan)(yan)磨(mo)(mo)是利用(yong)(yong)涂敷或者壓(ya)(ya)嵌游離磨(mo)(mo)粒與(yu)(yu)(yu)研(yan)(yan)(yan)磨(mo)(mo)劑的(de)(de)(de)(de)(de)混合(he)(he)物,在(zai)一定剛性(xing)的(de)(de)(de)(de)(de)軟質研(yan)(yan)(yan)具(ju)(ju)上,通過(guo)研(yan)(yan)(yan)具(ju)(ju)與(yu)(yu)(yu)工(gong)(gong)(gong)件(jian)向磨(mo)(mo)料施加(jia)一定壓(ya)(ya)力(li),磨(mo)(mo)料滾動(dong)(dong)與(yu)(yu)(yu)滑(hua)(hua)動(dong)(dong),從被(bei)研(yan)(yan)(yan)磨(mo)(mo)工(gong)(gong)(gong)件(jian)上去(qu)除極薄(bo)的(de)(de)(de)(de)(de)余量(liang)(liang),以提高工(gong)(gong)(gong)件(jian)的(de)(de)(de)(de)(de)精度和降低表(biao)(biao)面粗(cu)糙度值得加(jia)工(gong)(gong)(gong)方(fang)法。按研(yan)(yan)(yan)磨(mo)(mo)時有(you)無(wu)研(yan)(yan)(yan)磨(mo)(mo)液(ye)(ye)可分為干(gan)研(yan)(yan)(yan)與(yu)(yu)(yu)濕(shi)研(yan)(yan)(yan)。研(yan)(yan)(yan)磨(mo)(mo)過(guo)程中,在(zai)研(yan)(yan)(yan)磨(mo)(mo)壓(ya)(ya)力(li)下(xia),眾(zhong)多(duo)的(de)(de)(de)(de)(de)磨(mo)(mo)料微粒進(jin)(jin)行微量(liang)(liang)切削。對工(gong)(gong)(gong)件(jian)表(biao)(biao)面進(jin)(jin)行擠壓(ya)(ya)、刻劃、滑(hua)(hua)擦;在(zai)研(yan)(yan)(yan)具(ju)(ju)運動(dong)(dong)中當(dang)研(yan)(yan)(yan)具(ju)(ju)壓(ya)(ya)嵌的(de)(de)(de)(de)(de)磨(mo)(mo)粒脫(tuo)落后及液(ye)(ye)中磨(mo)(mo)粒相對工(gong)(gong)(gong)件(jian)發生滾動(dong)(dong)。研(yan)(yan)(yan)磨(mo)(mo)過(guo)程中,在(zai)研(yan)(yan)(yan)磨(mo)(mo)壓(ya)(ya)力(li)的(de)(de)(de)(de)(de)作(zuo)用(yong)(yong)下(xia),眾(zhong)多(duo)磨(mo)(mo)粒進(jin)(jin)行微量(liang)(liang)切削,同(tong)時被(bei)研(yan)(yan)(yan)磨(mo)(mo)表(biao)(biao)面發生微小起(qi)伏的(de)(de)(de)(de)(de)塑性(xing)變形,并且被(bei)加(jia)入的(de)(de)(de)(de)(de)諸(zhu)如硬(ying)脂(zhi)酸(suan)(suan)、油酸(suan)(suan)、脂(zhi)肪酸(suan)(suan)等活性(xing)物質與(yu)(yu)(yu)被(bei)研(yan)(yan)(yan)磨(mo)(mo)表(biao)(biao)面起(qi)化(hua)學作(zuo)用(yong)(yong)。隨著研(yan)(yan)(yan)磨(mo)(mo)加(jia)工(gong)(gong)(gong)的(de)(de)(de)(de)(de)進(jin)(jin)行,磨(mo)(mo)具(ju)(ju)與(yu)(yu)(yu)工(gong)(gong)(gong)件(jian)表(biao)(biao)面間更趨貼(tie)近,其間充滿了微屑與(yu)(yu)(yu)破(po)碎磨(mo)(mo)料的(de)(de)(de)(de)(de)碎渣,堵塞了研(yan)(yan)(yan)具(ju)(ju)表(biao)(biao)面,對工(gong)(gong)(gong)件(jian)表(biao)(biao)面起(qi)滑(hua)(hua)擦作(zuo)用(yong)(yong)。所以,研(yan)(yan)(yan)磨(mo)(mo)加(jia)工(gong)(gong)(gong)的(de)(de)(de)(de)(de)實質是磨(mo)(mo)粒的(de)(de)(de)(de)(de)微量(liang)(liang)切削、研(yan)(yan)(yan)磨(mo)(mo)表(biao)(biao)面微小起(qi)伏的(de)(de)(de)(de)(de)塑性(xing)流動(dong)(dong)、表(biao)(biao)面活性(xing)物質的(de)(de)(de)(de)(de)化(hua)學作(zuo)用(yong)(yong)及研(yan)(yan)(yan)具(ju)(ju)堵塞物與(yu)(yu)(yu)工(gong)(gong)(gong)件(jian)表(biao)(biao)面滑(hua)(hua)擦作(zuo)用(yong)(yong)的(de)(de)(de)(de)(de)綜(zong)合(he)(he)結(jie)果(guo)。
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德清機械密封將(jiang)熱量傳(chuan)給(gei)軸(zhou)(zhou)承(cheng),使軸(zhou)(zhou)承(cheng)溫度升高。為了(le)控制(zhi)傳(chuan)熱,所以密封(feng)的水也起到冷卻作用。
德清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德清機械密封低壓(ya)側(ce)(大氣)將清水、蒸汽(qi)等冷(leng)(leng)(leng)卻流體直接引(yin)入密(mi)(mi)封(feng)端(duan)泄露(lu)處的(de)一(yi)種(zhong)冷(leng)(leng)(leng)卻方式,也(ye)稱急冷(leng)(leng)(leng),急冷(leng)(leng)(leng)不僅冷(leng)(leng)(leng)卻*,還能將密(mi)(mi)封(feng)端(duan)面(mian)周(zhou)圍的(de)雜質及泄露(lu)液(ye)(ye)帶走,急冷(leng)(leng)(leng)液(ye)(ye)其壓(ya)力比密(mi)(mi)封(feng)介(jie)質壓(ya)力低。急冷(leng)(leng)(leng)液(ye)(ye)應盡(jin)量采(cai)用(yong)軟(ruan)水,以防(fang)止水垢產(chan)生破壞密(mi)(mi)封(feng)端(duan)面(mian)。當密(mi)(mi)封(feng)流體為易凝固、易結晶時,可(ke)用(yong)蒸汽(qi)、溶劑等防(fang)止流體凝結。