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發布(bu)時(shi)間:2021-12-17 11:54:31 人氣:97230 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,可以使谷城機械密封摩擦端面(mian)尺寸精度(du)(du)提高,閥門的密封(feng)面(mian),幾何(he)粗(cu)(cu)糙度(du)(du)和(he)表面(mian)粗(cu)(cu)糙度(du)(du),但不能提高密封(feng)表面(mian)的相互位置精度(du)(du)。
谷城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,隨著對谷城機械密封研(yan)(yan)究(jiu)(jiu)的(de)(de)(de)(de)復雜面(mian)(mian),之(zhi)間(jian)的(de)(de)(de)(de)表面(mian)(mian)和(he)密(mi)封(feng)磨(mo)(mo)料(liao)磨(mo)(mo)具研(yan)(yan)究(jiu)(jiu)相(xiang)(xiang)對(dui)運(yun)動(dong)(dong)(dong)時,密(mi)封(feng)圈(quan)(quan)表面(mian)(mian),磨(mo)(mo)料(liao)磨(mo)(mo)具研(yan)(yan)究(jiu)(jiu)部分和(he)密(mi)封(feng)面(mian)(mian)之(zhi)間(jian)的(de)(de)(de)(de)滑動(dong)(dong)(dong)或(huo)滾動(dong)(dong)(dong),切斷密(mi)封(feng)圈(quan)(quan)上薄薄的(de)(de)(de)(de)一層金屬表面(mian)(mian)。密(mi)封(feng)凸峰部分的(de)(de)(de)(de)圈(quan)(quan),表面(mian)(mian)研(yan)(yan)磨(mo)(mo),然后逐漸達到所要求的(de)(de)(de)(de)幾何(he)形狀。不僅是金屬磨(mo)(mo)料(liao)的(de)(de)(de)(de)研(yan)(yan)磨(mo)(mo)加(jia)(jia)工,以及化學作用。研(yan)(yan)磨(mo)(mo)油可使(shi)加(jia)(jia)工表面(mian)(mian)形成(cheng)的(de)(de)(de)(de)氧化膜(mo),從而加(jia)(jia)快(kuai)研(yan)(yan)磨(mo)(mo)過程(cheng)。地(di)面(mian)(mian)運(yun)動(dong)(dong)(dong)相(xiang)(xiang)對(dui)運(yun)動(dong)(dong)(dong)的(de)(de)(de)(de)表面(mian)(mian)和(he)密(mi)封(feng)圈(quan)(quan)密(mi)封(feng)圈(quan)(quan)的(de)(de)(de)(de)研(yan)(yan)究(jiu)(jiu),對(dui)每(mei)個點的(de)(de)(de)(de)表面(mian)(mian)上的(de)(de)(de)(de)道路(lu)和(he)相(xiang)(xiang)對(dui)滑動(dong)(dong)(dong)的(de)(de)(de)(de)研(yan)(yan)究(jiu)(jiu)應該是一樣的(de)(de)(de)(de)。和(he)相(xiang)(xiang)對(dui)運(yun)動(dong)(dong)(dong)方向(xiang)改變(bian)。改變(bian)密(mi)封(feng)環內的(de)(de)(de)(de)每(mei)個粒子的(de)(de)(de)(de)表面(mian)(mian)上運(yun)動(dong)(dong)(dong)的(de)(de)(de)(de)方向(xiang)不會(hui)重復他們的(de)(de)(de)(de)軌跡,以避免磨(mo)(mo)損(sun)明顯增(zeng)加(jia)(jia)了(le)密(mi)封(feng)環的(de)(de)(de)(de)表面(mian)(mian)粗糙度。此外,運(yun)動(dong)(dong)(dong)方向(xiang)的(de)(de)(de)(de)改變(bian)不能使(shi)磨(mo)(mo)粒分布比較均勻,且均勻切斷金屬密(mi)封(feng)環的(de)(de)(de)(de)表面(mian)(mian)。
谷城機械密封研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)是利用(yong)(yong)涂(tu)敷(fu)或者壓(ya)(ya)(ya)(ya)(ya)嵌(qian)游離磨(mo)(mo)(mo)(mo)(mo)粒(li)與(yu)(yu)(yu)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)劑(ji)的(de)(de)混合物,在(zai)(zai)(zai)一(yi)定剛性的(de)(de)軟質(zhi)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)具(ju)(ju)上,通(tong)過(guo)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)具(ju)(ju)與(yu)(yu)(yu)工(gong)件(jian)(jian)向磨(mo)(mo)(mo)(mo)(mo)料施加(jia)(jia)一(yi)定壓(ya)(ya)(ya)(ya)(ya)力,磨(mo)(mo)(mo)(mo)(mo)料滾動(dong)(dong)(dong)與(yu)(yu)(yu)滑(hua)動(dong)(dong)(dong),從被研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)工(gong)件(jian)(jian)上去除極薄的(de)(de)余量(liang),以(yi)提高工(gong)件(jian)(jian)的(de)(de)精度(du)和降低表(biao)(biao)(biao)面(mian)粗糙度(du)值(zhi)得(de)加(jia)(jia)工(gong)方(fang)法。按研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)時有無研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)液(ye)可分為(wei)干研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)與(yu)(yu)(yu)濕研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)。研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過(guo)程中(zhong)(zhong),在(zai)(zai)(zai)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓(ya)(ya)(ya)(ya)(ya)力下,眾(zhong)多的(de)(de)磨(mo)(mo)(mo)(mo)(mo)料微(wei)粒(li)進行微(wei)量(liang)切(qie)(qie)削(xue)(xue)。對(dui)工(gong)件(jian)(jian)表(biao)(biao)(biao)面(mian)進行擠(ji)壓(ya)(ya)(ya)(ya)(ya)、刻(ke)劃、滑(hua)擦;在(zai)(zai)(zai)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)具(ju)(ju)運(yun)動(dong)(dong)(dong)中(zhong)(zhong)當研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)具(ju)(ju)壓(ya)(ya)(ya)(ya)(ya)嵌(qian)的(de)(de)磨(mo)(mo)(mo)(mo)(mo)粒(li)脫落后及(ji)液(ye)中(zhong)(zhong)磨(mo)(mo)(mo)(mo)(mo)粒(li)相對(dui)工(gong)件(jian)(jian)發(fa)生滾動(dong)(dong)(dong)。研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過(guo)程中(zhong)(zhong),在(zai)(zai)(zai)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓(ya)(ya)(ya)(ya)(ya)力的(de)(de)作(zuo)(zuo)用(yong)(yong)下,眾(zhong)多磨(mo)(mo)(mo)(mo)(mo)粒(li)進行微(wei)量(liang)切(qie)(qie)削(xue)(xue),同時被研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面(mian)發(fa)生微(wei)小起(qi)伏(fu)的(de)(de)塑性變形,并且被加(jia)(jia)入的(de)(de)諸如硬脂(zhi)酸(suan)(suan)、油酸(suan)(suan)、脂(zhi)肪(fang)酸(suan)(suan)等活(huo)性物質(zhi)與(yu)(yu)(yu)被研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面(mian)起(qi)化(hua)學作(zuo)(zuo)用(yong)(yong)。隨著研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)(jia)工(gong)的(de)(de)進行,磨(mo)(mo)(mo)(mo)(mo)具(ju)(ju)與(yu)(yu)(yu)工(gong)件(jian)(jian)表(biao)(biao)(biao)面(mian)間(jian)更趨(qu)貼近,其間(jian)充滿了微(wei)屑與(yu)(yu)(yu)破(po)碎磨(mo)(mo)(mo)(mo)(mo)料的(de)(de)碎渣,堵塞了研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)具(ju)(ju)表(biao)(biao)(biao)面(mian),對(dui)工(gong)件(jian)(jian)表(biao)(biao)(biao)面(mian)起(qi)滑(hua)擦作(zuo)(zuo)用(yong)(yong)。所(suo)以(yi),研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)(jia)工(gong)的(de)(de)實質(zhi)是磨(mo)(mo)(mo)(mo)(mo)粒(li)的(de)(de)微(wei)量(liang)切(qie)(qie)削(xue)(xue)、研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面(mian)微(wei)小起(qi)伏(fu)的(de)(de)塑性流動(dong)(dong)(dong)、表(biao)(biao)(biao)面(mian)活(huo)性物質(zhi)的(de)(de)化(hua)學作(zuo)(zuo)用(yong)(yong)及(ji)研(yan)(yan)(yan)(yan)(yan)(yan)(yan)(yan)具(ju)(ju)堵塞物與(yu)(yu)(yu)工(gong)件(jian)(jian)表(biao)(biao)(biao)面(mian)滑(hua)擦作(zuo)(zuo)用(yong)(yong)的(de)(de)綜合結果。
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谷城機械密封將熱量(liang)傳(chuan)(chuan)給(gei)軸承,使軸承溫度升高。為了控制傳(chuan)(chuan)熱,所以密封的水也起到(dao)冷(leng)卻作(zuo)用。
谷城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谷城機械密封低壓側(大(da)氣)將清(qing)水、蒸汽等(deng)冷(leng)卻流(liu)體直接引入密(mi)封(feng)(feng)端泄露(lu)處(chu)的一種(zhong)冷(leng)卻方(fang)式(shi),也稱急(ji)冷(leng),急(ji)冷(leng)不僅冷(leng)卻*,還能將密(mi)封(feng)(feng)端面(mian)周圍(wei)的雜質及泄露(lu)液(ye)帶走,急(ji)冷(leng)液(ye)其(qi)壓力(li)(li)比密(mi)封(feng)(feng)介(jie)質壓力(li)(li)低。急(ji)冷(leng)液(ye)應盡量采用軟(ruan)水,以防止水垢(gou)產生破壞密(mi)封(feng)(feng)端面(mian)。當密(mi)封(feng)(feng)流(liu)體為易(yi)凝固、易(yi)結(jie)晶時,可用蒸汽、溶劑等(deng)防止流(liu)體凝結(jie)。