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發布時(shi)間:2021-12-17 11:54:31 人氣:97965 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,可以使濱海機械密封摩擦端面(mian)尺寸精度(du)提(ti)(ti)高(gao),閥門的密封面(mian),幾何粗(cu)(cu)糙度(du)和(he)表面(mian)粗(cu)(cu)糙度(du),但(dan)不能提(ti)(ti)高(gao)密封表面(mian)的相互位置精度(du)。
濱海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,隨著對濱海機械密封研(yan)(yan)(yan)究(jiu)的(de)(de)(de)(de)(de)(de)(de)復雜(za)面(mian)(mian)(mian)(mian)(mian),之間(jian)的(de)(de)(de)(de)(de)(de)(de)表(biao)(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)和(he)(he)(he)密(mi)(mi)封(feng)(feng)磨(mo)(mo)(mo)(mo)(mo)料(liao)(liao)磨(mo)(mo)(mo)(mo)(mo)具(ju)研(yan)(yan)(yan)究(jiu)相(xiang)對(dui)運(yun)動(dong)(dong)時,密(mi)(mi)封(feng)(feng)圈表(biao)(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian),磨(mo)(mo)(mo)(mo)(mo)料(liao)(liao)磨(mo)(mo)(mo)(mo)(mo)具(ju)研(yan)(yan)(yan)究(jiu)部分(fen)(fen)和(he)(he)(he)密(mi)(mi)封(feng)(feng)面(mian)(mian)(mian)(mian)(mian)之間(jian)的(de)(de)(de)(de)(de)(de)(de)滑動(dong)(dong)或滾動(dong)(dong),切斷密(mi)(mi)封(feng)(feng)圈上薄薄的(de)(de)(de)(de)(de)(de)(de)一層金屬(shu)表(biao)(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)。密(mi)(mi)封(feng)(feng)凸峰部分(fen)(fen)的(de)(de)(de)(de)(de)(de)(de)圈,表(biao)(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo),然后逐漸達到所要求的(de)(de)(de)(de)(de)(de)(de)幾何形狀。不僅是金屬(shu)磨(mo)(mo)(mo)(mo)(mo)料(liao)(liao)的(de)(de)(de)(de)(de)(de)(de)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加工,以及化學作用。研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)油(you)可(ke)使(shi)加工表(biao)(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)形成(cheng)的(de)(de)(de)(de)(de)(de)(de)氧(yang)化膜(mo),從而加快研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過程。地面(mian)(mian)(mian)(mian)(mian)運(yun)動(dong)(dong)相(xiang)對(dui)運(yun)動(dong)(dong)的(de)(de)(de)(de)(de)(de)(de)表(biao)(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)和(he)(he)(he)密(mi)(mi)封(feng)(feng)圈密(mi)(mi)封(feng)(feng)圈的(de)(de)(de)(de)(de)(de)(de)研(yan)(yan)(yan)究(jiu),對(dui)每(mei)個(ge)點的(de)(de)(de)(de)(de)(de)(de)表(biao)(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)上的(de)(de)(de)(de)(de)(de)(de)道路和(he)(he)(he)相(xiang)對(dui)滑動(dong)(dong)的(de)(de)(de)(de)(de)(de)(de)研(yan)(yan)(yan)究(jiu)應該是一樣的(de)(de)(de)(de)(de)(de)(de)。和(he)(he)(he)相(xiang)對(dui)運(yun)動(dong)(dong)方(fang)向(xiang)改變。改變密(mi)(mi)封(feng)(feng)環(huan)內的(de)(de)(de)(de)(de)(de)(de)每(mei)個(ge)粒子的(de)(de)(de)(de)(de)(de)(de)表(biao)(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)上運(yun)動(dong)(dong)的(de)(de)(de)(de)(de)(de)(de)方(fang)向(xiang)不會重復他們的(de)(de)(de)(de)(de)(de)(de)軌(gui)跡,以避免磨(mo)(mo)(mo)(mo)(mo)損(sun)明顯增加了密(mi)(mi)封(feng)(feng)環(huan)的(de)(de)(de)(de)(de)(de)(de)表(biao)(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)粗糙度。此外,運(yun)動(dong)(dong)方(fang)向(xiang)的(de)(de)(de)(de)(de)(de)(de)改變不能使(shi)磨(mo)(mo)(mo)(mo)(mo)粒分(fen)(fen)布比較均勻,且均勻切斷金屬(shu)密(mi)(mi)封(feng)(feng)環(huan)的(de)(de)(de)(de)(de)(de)(de)表(biao)(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)。
濱海機械密封研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)是利用(yong)(yong)涂敷或者壓(ya)嵌游(you)離磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)粒(li)與(yu)(yu)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)劑的(de)(de)(de)混(hun)合(he)物(wu)(wu),在一(yi)定剛(gang)性(xing)的(de)(de)(de)軟(ruan)質(zhi)(zhi)研(yan)(yan)(yan)(yan)具上,通(tong)過(guo)研(yan)(yan)(yan)(yan)具與(yu)(yu)工(gong)(gong)(gong)件(jian)向磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)料施加一(yi)定壓(ya)力,磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)料滾(gun)動(dong)與(yu)(yu)滑動(dong),從被(bei)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)工(gong)(gong)(gong)件(jian)上去除極薄的(de)(de)(de)余量,以提高(gao)工(gong)(gong)(gong)件(jian)的(de)(de)(de)精度和降(jiang)低表(biao)(biao)(biao)面(mian)(mian)粗糙(cao)度值得加工(gong)(gong)(gong)方法。按研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)時有無研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)液(ye)可分為干研(yan)(yan)(yan)(yan)與(yu)(yu)濕研(yan)(yan)(yan)(yan)。研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)過(guo)程(cheng)中,在研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)壓(ya)力下,眾多的(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)料微(wei)(wei)粒(li)進(jin)(jin)行微(wei)(wei)量切削(xue)。對(dui)工(gong)(gong)(gong)件(jian)表(biao)(biao)(biao)面(mian)(mian)進(jin)(jin)行擠壓(ya)、刻劃、滑擦(ca);在研(yan)(yan)(yan)(yan)具運動(dong)中當研(yan)(yan)(yan)(yan)具壓(ya)嵌的(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)粒(li)脫(tuo)落后(hou)及液(ye)中磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)粒(li)相對(dui)工(gong)(gong)(gong)件(jian)發(fa)(fa)生滾(gun)動(dong)。研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)過(guo)程(cheng)中,在研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)壓(ya)力的(de)(de)(de)作用(yong)(yong)下,眾多磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)粒(li)進(jin)(jin)行微(wei)(wei)量切削(xue),同時被(bei)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面(mian)(mian)發(fa)(fa)生微(wei)(wei)小起(qi)(qi)伏的(de)(de)(de)塑性(xing)變形,并且被(bei)加入的(de)(de)(de)諸如硬脂酸、油酸、脂肪酸等活性(xing)物(wu)(wu)質(zhi)(zhi)與(yu)(yu)被(bei)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面(mian)(mian)起(qi)(qi)化學(xue)作用(yong)(yong)。隨著研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)加工(gong)(gong)(gong)的(de)(de)(de)進(jin)(jin)行,磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)具與(yu)(yu)工(gong)(gong)(gong)件(jian)表(biao)(biao)(biao)面(mian)(mian)間(jian)更趨貼近,其間(jian)充滿了(le)(le)微(wei)(wei)屑(xie)與(yu)(yu)破(po)碎磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)料的(de)(de)(de)碎渣,堵(du)塞了(le)(le)研(yan)(yan)(yan)(yan)具表(biao)(biao)(biao)面(mian)(mian),對(dui)工(gong)(gong)(gong)件(jian)表(biao)(biao)(biao)面(mian)(mian)起(qi)(qi)滑擦(ca)作用(yong)(yong)。所(suo)以,研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)加工(gong)(gong)(gong)的(de)(de)(de)實質(zhi)(zhi)是磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)粒(li)的(de)(de)(de)微(wei)(wei)量切削(xue)、研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面(mian)(mian)微(wei)(wei)小起(qi)(qi)伏的(de)(de)(de)塑性(xing)流動(dong)、表(biao)(biao)(biao)面(mian)(mian)活性(xing)物(wu)(wu)質(zhi)(zhi)的(de)(de)(de)化學(xue)作用(yong)(yong)及研(yan)(yan)(yan)(yan)具堵(du)塞物(wu)(wu)與(yu)(yu)工(gong)(gong)(gong)件(jian)表(biao)(biao)(biao)面(mian)(mian)滑擦(ca)作用(yong)(yong)的(de)(de)(de)綜合(he)結(jie)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濱海機械密封將(jiang)熱量傳(chuan)給軸(zhou)承(cheng),使軸(zhou)承(cheng)溫度升(sheng)高。為了(le)控(kong)制傳(chuan)熱,所以密封的水(shui)也起(qi)到(dao)冷卻作用。
濱海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濱海機械密封低(di)壓側(大氣(qi))將(jiang)清水(shui)、蒸(zheng)汽(qi)等冷卻流體直接引入密封(feng)端(duan)泄露(lu)處的(de)一種(zhong)冷卻方式,也稱(cheng)急冷,急冷不僅冷卻*,還能將(jiang)密封(feng)端(duan)面周圍的(de)雜質及泄露(lu)液(ye)帶走,急冷液(ye)其壓力比密封(feng)介質壓力低(di)。急冷液(ye)應盡量采用軟水(shui),以防止水(shui)垢產生破壞密封(feng)端(duan)面。當密封(feng)流體為易凝(ning)固、易結晶(jing)時,可用蒸(zheng)汽(qi)、溶劑等防止流體凝(ning)結。