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發(fa)布時間:2021-12-17 11:54:31 人氣:97923 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,可以使西陵機械密封摩(mo)擦端面(mian)(mian)尺寸精度提高(gao),閥(fa)門(men)的密封(feng)面(mian)(mian),幾何粗糙度和表(biao)面(mian)(mian)粗糙度,但不能提高(gao)密封(feng)表(biao)面(mian)(mian)的相互位置精度。
西陵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,隨著對西陵機械密封研(yan)(yan)(yan)究的(de)(de)(de)復雜面(mian)(mian)(mian)(mian),之(zhi)(zhi)間的(de)(de)(de)表(biao)面(mian)(mian)(mian)(mian)和密(mi)(mi)封(feng)(feng)磨料(liao)磨具研(yan)(yan)(yan)究相(xiang)(xiang)(xiang)對(dui)運(yun)(yun)動(dong)(dong)(dong)時,密(mi)(mi)封(feng)(feng)圈表(biao)面(mian)(mian)(mian)(mian),磨料(liao)磨具研(yan)(yan)(yan)究部分(fen)和密(mi)(mi)封(feng)(feng)面(mian)(mian)(mian)(mian)之(zhi)(zhi)間的(de)(de)(de)滑動(dong)(dong)(dong)或滾動(dong)(dong)(dong),切(qie)斷密(mi)(mi)封(feng)(feng)圈上薄(bo)(bo)薄(bo)(bo)的(de)(de)(de)一層金屬表(biao)面(mian)(mian)(mian)(mian)。密(mi)(mi)封(feng)(feng)凸峰部分(fen)的(de)(de)(de)圈,表(biao)面(mian)(mian)(mian)(mian)研(yan)(yan)(yan)磨,然后逐漸達(da)到所(suo)要求的(de)(de)(de)幾(ji)何形(xing)(xing)狀(zhuang)。不僅是金屬磨料(liao)的(de)(de)(de)研(yan)(yan)(yan)磨加(jia)工,以(yi)及化學作用。研(yan)(yan)(yan)磨油可使加(jia)工表(biao)面(mian)(mian)(mian)(mian)形(xing)(xing)成的(de)(de)(de)氧化膜,從而加(jia)快研(yan)(yan)(yan)磨過程。地面(mian)(mian)(mian)(mian)運(yun)(yun)動(dong)(dong)(dong)相(xiang)(xiang)(xiang)對(dui)運(yun)(yun)動(dong)(dong)(dong)的(de)(de)(de)表(biao)面(mian)(mian)(mian)(mian)和密(mi)(mi)封(feng)(feng)圈密(mi)(mi)封(feng)(feng)圈的(de)(de)(de)研(yan)(yan)(yan)究,對(dui)每(mei)個(ge)點的(de)(de)(de)表(biao)面(mian)(mian)(mian)(mian)上的(de)(de)(de)道路和相(xiang)(xiang)(xiang)對(dui)滑動(dong)(dong)(dong)的(de)(de)(de)研(yan)(yan)(yan)究應該(gai)是一樣的(de)(de)(de)。和相(xiang)(xiang)(xiang)對(dui)運(yun)(yun)動(dong)(dong)(dong)方(fang)向改(gai)變(bian)。改(gai)變(bian)密(mi)(mi)封(feng)(feng)環內的(de)(de)(de)每(mei)個(ge)粒子的(de)(de)(de)表(biao)面(mian)(mian)(mian)(mian)上運(yun)(yun)動(dong)(dong)(dong)的(de)(de)(de)方(fang)向不會(hui)重復他們的(de)(de)(de)軌跡(ji),以(yi)避免磨損(sun)明顯增加(jia)了密(mi)(mi)封(feng)(feng)環的(de)(de)(de)表(biao)面(mian)(mian)(mian)(mian)粗糙度(du)。此外(wai),運(yun)(yun)動(dong)(dong)(dong)方(fang)向的(de)(de)(de)改(gai)變(bian)不能使磨粒分(fen)布比較均勻,且均勻切(qie)斷金屬密(mi)(mi)封(feng)(feng)環的(de)(de)(de)表(biao)面(mian)(mian)(mian)(mian)。
西陵機械密封研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)是利用涂(tu)敷或者壓嵌游離磨(mo)(mo)(mo)(mo)(mo)粒與(yu)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)劑(ji)的(de)(de)混合(he)物,在一定(ding)剛(gang)性的(de)(de)軟質(zhi)研(yan)(yan)(yan)具(ju)(ju)(ju)上(shang),通過研(yan)(yan)(yan)具(ju)(ju)(ju)與(yu)工(gong)(gong)(gong)件(jian)(jian)(jian)向磨(mo)(mo)(mo)(mo)(mo)料(liao)施加一定(ding)壓力(li),磨(mo)(mo)(mo)(mo)(mo)料(liao)滾動(dong)與(yu)滑動(dong),從被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)工(gong)(gong)(gong)件(jian)(jian)(jian)上(shang)去除極薄的(de)(de)余量(liang)(liang),以提高工(gong)(gong)(gong)件(jian)(jian)(jian)的(de)(de)精(jing)度和降低表(biao)(biao)(biao)(biao)面(mian)粗糙度值得加工(gong)(gong)(gong)方法。按研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)時有無(wu)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)液(ye)可(ke)分為干研(yan)(yan)(yan)與(yu)濕研(yan)(yan)(yan)。研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過程(cheng)中,在研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓力(li)下,眾(zhong)多的(de)(de)磨(mo)(mo)(mo)(mo)(mo)料(liao)微(wei)粒進(jin)行微(wei)量(liang)(liang)切(qie)削(xue)。對(dui)工(gong)(gong)(gong)件(jian)(jian)(jian)表(biao)(biao)(biao)(biao)面(mian)進(jin)行擠壓、刻劃、滑擦;在研(yan)(yan)(yan)具(ju)(ju)(ju)運動(dong)中當研(yan)(yan)(yan)具(ju)(ju)(ju)壓嵌的(de)(de)磨(mo)(mo)(mo)(mo)(mo)粒脫落后及液(ye)中磨(mo)(mo)(mo)(mo)(mo)粒相對(dui)工(gong)(gong)(gong)件(jian)(jian)(jian)發(fa)生滾動(dong)。研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過程(cheng)中,在研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓力(li)的(de)(de)作(zuo)用下,眾(zhong)多磨(mo)(mo)(mo)(mo)(mo)粒進(jin)行微(wei)量(liang)(liang)切(qie)削(xue),同時被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)(biao)面(mian)發(fa)生微(wei)小起伏的(de)(de)塑性變形,并且被加入的(de)(de)諸如硬脂酸、油酸、脂肪(fang)酸等活性物質(zhi)與(yu)被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)(biao)面(mian)起化(hua)學作(zuo)用。隨著研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加工(gong)(gong)(gong)的(de)(de)進(jin)行,磨(mo)(mo)(mo)(mo)(mo)具(ju)(ju)(ju)與(yu)工(gong)(gong)(gong)件(jian)(jian)(jian)表(biao)(biao)(biao)(biao)面(mian)間(jian)更(geng)趨貼近,其間(jian)充滿了微(wei)屑(xie)與(yu)破碎磨(mo)(mo)(mo)(mo)(mo)料(liao)的(de)(de)碎渣,堵(du)塞(sai)(sai)了研(yan)(yan)(yan)具(ju)(ju)(ju)表(biao)(biao)(biao)(biao)面(mian),對(dui)工(gong)(gong)(gong)件(jian)(jian)(jian)表(biao)(biao)(biao)(biao)面(mian)起滑擦作(zuo)用。所以,研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加工(gong)(gong)(gong)的(de)(de)實質(zhi)是磨(mo)(mo)(mo)(mo)(mo)粒的(de)(de)微(wei)量(liang)(liang)切(qie)削(xue)、研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)(biao)面(mian)微(wei)小起伏的(de)(de)塑性流動(dong)、表(biao)(biao)(biao)(biao)面(mian)活性物質(zhi)的(de)(de)化(hua)學作(zuo)用及研(yan)(yan)(yan)具(ju)(ju)(ju)堵(du)塞(sai)(sai)物與(yu)工(gong)(gong)(gong)件(jian)(jian)(jian)表(biao)(biao)(biao)(biao)面(mian)滑擦作(zuo)用的(de)(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西陵機械密封將熱量傳(chuan)給軸(zhou)承,使(shi)軸(zhou)承溫度升高。為了控制傳(chuan)熱,所以密封的水也起到冷卻(que)作用。
西陵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西陵機械密封低壓側(大氣(qi))將清水、蒸汽等冷卻流體(ti)直接引入密封端泄(xie)露處(chu)的一種(zhong)冷卻方式(shi),也稱(cheng)急冷,急冷不(bu)僅冷卻*,還能將密封端面周圍的雜質及泄(xie)露液(ye)帶(dai)走,急冷液(ye)其壓力(li)比(bi)密封介質壓力(li)低。急冷液(ye)應(ying)盡量采用軟水,以防止水垢(gou)產生(sheng)破壞密封端面。當(dang)密封流體(ti)為易(yi)凝(ning)固、易(yi)結晶(jing)時,可用蒸汽、溶劑(ji)等防止流體(ti)凝(ning)結。