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發(fa)布時(shi)間:2021-12-17 11:54:31 人氣:98023 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,可以使延川機械密封摩擦端面(mian)尺(chi)寸精(jing)度(du)提高(gao),閥門(men)的密封面(mian),幾何粗(cu)糙度(du)和表(biao)面(mian)粗(cu)糙度(du),但不(bu)能提高(gao)密封表(biao)面(mian)的相互位(wei)置精(jing)度(du)。
延川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,隨著對延川機械密封研(yan)究(jiu)的(de)(de)(de)復(fu)雜面(mian)(mian)(mian),之間的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)和(he)密封(feng)(feng)磨(mo)(mo)(mo)(mo)料(liao)磨(mo)(mo)(mo)(mo)具研(yan)究(jiu)相(xiang)對運(yun)動時,密封(feng)(feng)圈表(biao)(biao)面(mian)(mian)(mian),磨(mo)(mo)(mo)(mo)料(liao)磨(mo)(mo)(mo)(mo)具研(yan)究(jiu)部(bu)(bu)分(fen)和(he)密封(feng)(feng)面(mian)(mian)(mian)之間的(de)(de)(de)滑(hua)動或滾動,切斷(duan)密封(feng)(feng)圈上薄薄的(de)(de)(de)一層金(jin)屬表(biao)(biao)面(mian)(mian)(mian)。密封(feng)(feng)凸峰部(bu)(bu)分(fen)的(de)(de)(de)圈,表(biao)(biao)面(mian)(mian)(mian)研(yan)磨(mo)(mo)(mo)(mo),然(ran)后逐漸達到所要求的(de)(de)(de)幾(ji)何形(xing)狀。不僅是金(jin)屬磨(mo)(mo)(mo)(mo)料(liao)的(de)(de)(de)研(yan)磨(mo)(mo)(mo)(mo)加(jia)工,以(yi)及(ji)化學作(zuo)用。研(yan)磨(mo)(mo)(mo)(mo)油可使加(jia)工表(biao)(biao)面(mian)(mian)(mian)形(xing)成的(de)(de)(de)氧(yang)化膜(mo),從(cong)而(er)加(jia)快研(yan)磨(mo)(mo)(mo)(mo)過程。地(di)面(mian)(mian)(mian)運(yun)動相(xiang)對運(yun)動的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)和(he)密封(feng)(feng)圈密封(feng)(feng)圈的(de)(de)(de)研(yan)究(jiu),對每(mei)個(ge)點(dian)的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)上的(de)(de)(de)道路和(he)相(xiang)對滑(hua)動的(de)(de)(de)研(yan)究(jiu)應(ying)該是一樣的(de)(de)(de)。和(he)相(xiang)對運(yun)動方(fang)向(xiang)改變。改變密封(feng)(feng)環(huan)內的(de)(de)(de)每(mei)個(ge)粒(li)子的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)上運(yun)動的(de)(de)(de)方(fang)向(xiang)不會重(zhong)復(fu)他們的(de)(de)(de)軌跡(ji),以(yi)避免磨(mo)(mo)(mo)(mo)損明(ming)顯(xian)增加(jia)了密封(feng)(feng)環(huan)的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)粗糙度。此外,運(yun)動方(fang)向(xiang)的(de)(de)(de)改變不能使磨(mo)(mo)(mo)(mo)粒(li)分(fen)布比(bi)較(jiao)均勻,且均勻切斷(duan)金(jin)屬密封(feng)(feng)環(huan)的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)。
延川機械密封研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)是(shi)利用(yong)涂敷或者壓嵌游離磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)與研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)劑的(de)(de)(de)(de)(de)(de)混(hun)合物(wu),在(zai)一(yi)定剛性(xing)(xing)的(de)(de)(de)(de)(de)(de)軟質研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)上,通過(guo)研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)與工(gong)件(jian)向(xiang)磨(mo)(mo)(mo)(mo)(mo)料(liao)施(shi)加(jia)一(yi)定壓力(li),磨(mo)(mo)(mo)(mo)(mo)料(liao)滾動(dong)與滑動(dong),從被(bei)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)工(gong)件(jian)上去除極薄的(de)(de)(de)(de)(de)(de)余量(liang),以提高工(gong)件(jian)的(de)(de)(de)(de)(de)(de)精度和降低(di)表(biao)面(mian)(mian)(mian)粗糙度值得加(jia)工(gong)方(fang)法(fa)。按研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)時有無(wu)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)液可(ke)分為干研(yan)(yan)(yan)(yan)(yan)與濕研(yan)(yan)(yan)(yan)(yan)。研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過(guo)程(cheng)(cheng)中,在(zai)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓力(li)下,眾多的(de)(de)(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)料(liao)微(wei)(wei)粒(li)(li)進(jin)(jin)行(xing)(xing)微(wei)(wei)量(liang)切(qie)(qie)削(xue)(xue)。對(dui)工(gong)件(jian)表(biao)面(mian)(mian)(mian)進(jin)(jin)行(xing)(xing)擠壓、刻劃、滑擦;在(zai)研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)運動(dong)中當研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)壓嵌的(de)(de)(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)脫落后(hou)及(ji)液中磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)相對(dui)工(gong)件(jian)發(fa)(fa)生(sheng)滾動(dong)。研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過(guo)程(cheng)(cheng)中,在(zai)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓力(li)的(de)(de)(de)(de)(de)(de)作(zuo)(zuo)用(yong)下,眾多磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)進(jin)(jin)行(xing)(xing)微(wei)(wei)量(liang)切(qie)(qie)削(xue)(xue),同時被(bei)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)面(mian)(mian)(mian)發(fa)(fa)生(sheng)微(wei)(wei)小(xiao)起(qi)(qi)伏的(de)(de)(de)(de)(de)(de)塑性(xing)(xing)變(bian)形,并且(qie)被(bei)加(jia)入的(de)(de)(de)(de)(de)(de)諸(zhu)如硬脂(zhi)酸、油(you)酸、脂(zhi)肪酸等活性(xing)(xing)物(wu)質與被(bei)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)面(mian)(mian)(mian)起(qi)(qi)化學(xue)(xue)作(zuo)(zuo)用(yong)。隨著研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)的(de)(de)(de)(de)(de)(de)進(jin)(jin)行(xing)(xing),磨(mo)(mo)(mo)(mo)(mo)具(ju)(ju)與工(gong)件(jian)表(biao)面(mian)(mian)(mian)間更趨貼近(jin),其(qi)間充滿(man)了微(wei)(wei)屑與破碎磨(mo)(mo)(mo)(mo)(mo)料(liao)的(de)(de)(de)(de)(de)(de)碎渣(zha),堵塞了研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)表(biao)面(mian)(mian)(mian),對(dui)工(gong)件(jian)表(biao)面(mian)(mian)(mian)起(qi)(qi)滑擦作(zuo)(zuo)用(yong)。所以,研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)的(de)(de)(de)(de)(de)(de)實質是(shi)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)的(de)(de)(de)(de)(de)(de)微(wei)(wei)量(liang)切(qie)(qie)削(xue)(xue)、研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)面(mian)(mian)(mian)微(wei)(wei)小(xiao)起(qi)(qi)伏的(de)(de)(de)(de)(de)(de)塑性(xing)(xing)流動(dong)、表(biao)面(mian)(mian)(mian)活性(xing)(xing)物(wu)質的(de)(de)(de)(de)(de)(de)化學(xue)(xue)作(zuo)(zuo)用(yong)及(ji)研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)堵塞物(wu)與工(gong)件(jian)表(biao)面(mian)(mian)(mian)滑擦作(zuo)(zuo)用(yong)的(de)(de)(de)(de)(de)(de)綜合結果(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延川機械密封將熱量(liang)傳給軸(zhou)承,使軸(zhou)承溫(wen)度升(sheng)高。為了控制傳熱,所以密封的水(shui)也起(qi)到(dao)冷卻作用。
延川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延川機械密封低壓側(大氣)將清水、蒸汽(qi)等(deng)(deng)冷(leng)(leng)卻(que)流體直接引入密(mi)封端(duan)泄(xie)露處的(de)(de)一種冷(leng)(leng)卻(que)方式,也(ye)稱急(ji)(ji)冷(leng)(leng),急(ji)(ji)冷(leng)(leng)不僅冷(leng)(leng)卻(que)*,還能將密(mi)封端(duan)面周(zhou)圍的(de)(de)雜質及泄(xie)露液(ye)(ye)帶走,急(ji)(ji)冷(leng)(leng)液(ye)(ye)其壓力(li)比(bi)密(mi)封介(jie)質壓力(li)低。急(ji)(ji)冷(leng)(leng)液(ye)(ye)應盡量采用(yong)(yong)軟水,以防止水垢產生破壞密(mi)封端(duan)面。當(dang)密(mi)封流體為易(yi)凝(ning)(ning)固、易(yi)結晶時(shi),可用(yong)(yong)蒸汽(qi)、溶劑等(deng)(deng)防止流體凝(ning)(ning)結。