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發布時間(jian):2021-12-17 11:54:31 人氣:98038 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,可以使疏勒機械密封摩(mo)擦端面(mian)尺寸精(jing)度(du)提高(gao)(gao),閥門的(de)(de)密封面(mian),幾(ji)何粗糙度(du)和表面(mian)粗糙度(du),但不能(neng)提高(gao)(gao)密封表面(mian)的(de)(de)相(xiang)互位(wei)置精(jing)度(du)。
疏勒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,隨著對疏勒機械密封研(yan)(yan)(yan)(yan)(yan)(yan)究(jiu)(jiu)的(de)(de)復雜面(mian)(mian)(mian),之間的(de)(de)表(biao)(biao)面(mian)(mian)(mian)和(he)密(mi)(mi)封(feng)磨(mo)(mo)(mo)料(liao)磨(mo)(mo)(mo)具(ju)(ju)研(yan)(yan)(yan)(yan)(yan)(yan)究(jiu)(jiu)相(xiang)(xiang)對運(yun)動(dong)(dong)(dong)(dong)時,密(mi)(mi)封(feng)圈(quan)(quan)表(biao)(biao)面(mian)(mian)(mian),磨(mo)(mo)(mo)料(liao)磨(mo)(mo)(mo)具(ju)(ju)研(yan)(yan)(yan)(yan)(yan)(yan)究(jiu)(jiu)部(bu)分(fen)和(he)密(mi)(mi)封(feng)面(mian)(mian)(mian)之間的(de)(de)滑動(dong)(dong)(dong)(dong)或滾動(dong)(dong)(dong)(dong),切(qie)斷密(mi)(mi)封(feng)圈(quan)(quan)上薄薄的(de)(de)一層金屬(shu)表(biao)(biao)面(mian)(mian)(mian)。密(mi)(mi)封(feng)凸峰部(bu)分(fen)的(de)(de)圈(quan)(quan),表(biao)(biao)面(mian)(mian)(mian)研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo),然后逐漸達到所要求的(de)(de)幾何形狀。不僅是(shi)金屬(shu)磨(mo)(mo)(mo)料(liao)的(de)(de)研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)加工,以(yi)及化學(xue)作用。研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)油可使(shi)加工表(biao)(biao)面(mian)(mian)(mian)形成的(de)(de)氧(yang)化膜(mo),從而加快(kuai)研(yan)(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)過程(cheng)。地面(mian)(mian)(mian)運(yun)動(dong)(dong)(dong)(dong)相(xiang)(xiang)對運(yun)動(dong)(dong)(dong)(dong)的(de)(de)表(biao)(biao)面(mian)(mian)(mian)和(he)密(mi)(mi)封(feng)圈(quan)(quan)密(mi)(mi)封(feng)圈(quan)(quan)的(de)(de)研(yan)(yan)(yan)(yan)(yan)(yan)究(jiu)(jiu),對每個點的(de)(de)表(biao)(biao)面(mian)(mian)(mian)上的(de)(de)道路和(he)相(xiang)(xiang)對滑動(dong)(dong)(dong)(dong)的(de)(de)研(yan)(yan)(yan)(yan)(yan)(yan)究(jiu)(jiu)應該(gai)是(shi)一樣的(de)(de)。和(he)相(xiang)(xiang)對運(yun)動(dong)(dong)(dong)(dong)方(fang)向改變。改變密(mi)(mi)封(feng)環(huan)內的(de)(de)每個粒子(zi)的(de)(de)表(biao)(biao)面(mian)(mian)(mian)上運(yun)動(dong)(dong)(dong)(dong)的(de)(de)方(fang)向不會(hui)重復他們(men)的(de)(de)軌跡(ji),以(yi)避免磨(mo)(mo)(mo)損明顯增加了密(mi)(mi)封(feng)環(huan)的(de)(de)表(biao)(biao)面(mian)(mian)(mian)粗糙度。此(ci)外,運(yun)動(dong)(dong)(dong)(dong)方(fang)向的(de)(de)改變不能使(shi)磨(mo)(mo)(mo)粒分(fen)布比較均勻,且均勻切(qie)斷金屬(shu)密(mi)(mi)封(feng)環(huan)的(de)(de)表(biao)(biao)面(mian)(mian)(mian)。
疏勒機械密封研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)是利(li)用(yong)涂(tu)敷(fu)或者壓(ya)(ya)嵌游離磨(mo)(mo)(mo)(mo)(mo)(mo)粒與(yu)(yu)(yu)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)劑(ji)的(de)(de)(de)(de)混合(he)物(wu),在一(yi)定剛性的(de)(de)(de)(de)軟質研(yan)(yan)(yan)具(ju)上,通過(guo)研(yan)(yan)(yan)具(ju)與(yu)(yu)(yu)工(gong)件(jian)向(xiang)磨(mo)(mo)(mo)(mo)(mo)(mo)料施(shi)加(jia)(jia)一(yi)定壓(ya)(ya)力,磨(mo)(mo)(mo)(mo)(mo)(mo)料滾(gun)動(dong)與(yu)(yu)(yu)滑動(dong),從被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)工(gong)件(jian)上去除極薄(bo)的(de)(de)(de)(de)余(yu)量(liang),以(yi)提高(gao)工(gong)件(jian)的(de)(de)(de)(de)精(jing)度和降(jiang)低表(biao)(biao)面(mian)(mian)粗糙度值得加(jia)(jia)工(gong)方(fang)法。按研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)時有(you)無(wu)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)液可分為干研(yan)(yan)(yan)與(yu)(yu)(yu)濕(shi)研(yan)(yan)(yan)。研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)過(guo)程中(zhong),在研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)壓(ya)(ya)力下(xia),眾多(duo)的(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)(mo)料微(wei)粒進行(xing)微(wei)量(liang)切削(xue)。對(dui)工(gong)件(jian)表(biao)(biao)面(mian)(mian)進行(xing)擠(ji)壓(ya)(ya)、刻劃、滑擦;在研(yan)(yan)(yan)具(ju)運動(dong)中(zhong)當研(yan)(yan)(yan)具(ju)壓(ya)(ya)嵌的(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)(mo)粒脫落后(hou)及液中(zhong)磨(mo)(mo)(mo)(mo)(mo)(mo)粒相(xiang)對(dui)工(gong)件(jian)發生滾(gun)動(dong)。研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)過(guo)程中(zhong),在研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)壓(ya)(ya)力的(de)(de)(de)(de)作(zuo)用(yong)下(xia),眾多(duo)磨(mo)(mo)(mo)(mo)(mo)(mo)粒進行(xing)微(wei)量(liang)切削(xue),同時被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)面(mian)(mian)發生微(wei)小起(qi)伏的(de)(de)(de)(de)塑(su)(su)性變形,并且(qie)被加(jia)(jia)入(ru)的(de)(de)(de)(de)諸如硬脂(zhi)酸(suan)、油酸(suan)、脂(zhi)肪酸(suan)等活性物(wu)質與(yu)(yu)(yu)被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)面(mian)(mian)起(qi)化學(xue)作(zuo)用(yong)。隨著研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)加(jia)(jia)工(gong)的(de)(de)(de)(de)進行(xing),磨(mo)(mo)(mo)(mo)(mo)(mo)具(ju)與(yu)(yu)(yu)工(gong)件(jian)表(biao)(biao)面(mian)(mian)間(jian)更趨貼近,其間(jian)充滿了(le)微(wei)屑與(yu)(yu)(yu)破碎(sui)磨(mo)(mo)(mo)(mo)(mo)(mo)料的(de)(de)(de)(de)碎(sui)渣,堵塞(sai)了(le)研(yan)(yan)(yan)具(ju)表(biao)(biao)面(mian)(mian),對(dui)工(gong)件(jian)表(biao)(biao)面(mian)(mian)起(qi)滑擦作(zuo)用(yong)。所以(yi),研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)加(jia)(jia)工(gong)的(de)(de)(de)(de)實質是磨(mo)(mo)(mo)(mo)(mo)(mo)粒的(de)(de)(de)(de)微(wei)量(liang)切削(xue)、研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)面(mian)(mian)微(wei)小起(qi)伏的(de)(de)(de)(de)塑(su)(su)性流動(dong)、表(biao)(biao)面(mian)(mian)活性物(wu)質的(de)(de)(de)(de)化學(xue)作(zuo)用(yong)及研(yan)(yan)(yan)具(ju)堵塞(sai)物(wu)與(yu)(yu)(yu)工(gong)件(jian)表(biao)(biao)面(mian)(mian)滑擦作(zuo)用(yong)的(de)(de)(de)(de)綜合(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疏勒機械密封將熱(re)量傳給軸(zhou)承,使(shi)軸(zhou)承溫(wen)度升高。為了控制傳熱(re),所以密(mi)封的水也起到冷卻作用(yong)。
疏勒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疏勒機械密封低(di)壓(ya)側(大氣)將清(qing)水、蒸(zheng)汽等冷(leng)卻流體直接引入密(mi)封(feng)端泄露處的(de)一種(zhong)冷(leng)卻方式,也稱急(ji)冷(leng),急(ji)冷(leng)不僅冷(leng)卻*,還能(neng)將密(mi)封(feng)端面周圍的(de)雜質及泄露液帶走,急(ji)冷(leng)液其壓(ya)力(li)比密(mi)封(feng)介(jie)質壓(ya)力(li)低(di)。急(ji)冷(leng)液應盡量采用軟水,以防止水垢產生破壞密(mi)封(feng)端面。當密(mi)封(feng)流體為易凝固、易結晶時,可用蒸(zheng)汽、溶劑等防止流體凝結。