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發布(bu)時間:2021-12-17 11:54:31 人氣(qi):97852 來(lai)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,可以使秀洲機械密封摩擦端面(mian)尺寸精度提高,閥門的(de)密(mi)封面(mian),幾(ji)何粗糙(cao)度和表面(mian)粗糙(cao)度,但不(bu)能(neng)提高密(mi)封表面(mian)的(de)相互位置精度。
秀洲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,隨著對秀洲機械密封研(yan)(yan)(yan)(yan)究(jiu)(jiu)的(de)(de)(de)(de)復雜面(mian)(mian),之間(jian)的(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)和(he)(he)(he)密封(feng)(feng)(feng)磨(mo)料(liao)磨(mo)具(ju)研(yan)(yan)(yan)(yan)究(jiu)(jiu)相(xiang)對運(yun)(yun)動(dong)時,密封(feng)(feng)(feng)圈(quan)(quan)表(biao)(biao)(biao)面(mian)(mian),磨(mo)料(liao)磨(mo)具(ju)研(yan)(yan)(yan)(yan)究(jiu)(jiu)部分和(he)(he)(he)密封(feng)(feng)(feng)面(mian)(mian)之間(jian)的(de)(de)(de)(de)滑動(dong)或滾(gun)動(dong),切(qie)斷(duan)密封(feng)(feng)(feng)圈(quan)(quan)上(shang)薄(bo)(bo)薄(bo)(bo)的(de)(de)(de)(de)一層金屬(shu)表(biao)(biao)(biao)面(mian)(mian)。密封(feng)(feng)(feng)凸(tu)峰部分的(de)(de)(de)(de)圈(quan)(quan),表(biao)(biao)(biao)面(mian)(mian)研(yan)(yan)(yan)(yan)磨(mo),然后逐漸達到所要求的(de)(de)(de)(de)幾何(he)形狀(zhuang)。不(bu)(bu)僅是(shi)金屬(shu)磨(mo)料(liao)的(de)(de)(de)(de)研(yan)(yan)(yan)(yan)磨(mo)加工,以及化學(xue)作(zuo)用。研(yan)(yan)(yan)(yan)磨(mo)油可使(shi)加工表(biao)(biao)(biao)面(mian)(mian)形成的(de)(de)(de)(de)氧化膜(mo),從而加快研(yan)(yan)(yan)(yan)磨(mo)過程。地面(mian)(mian)運(yun)(yun)動(dong)相(xiang)對運(yun)(yun)動(dong)的(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)和(he)(he)(he)密封(feng)(feng)(feng)圈(quan)(quan)密封(feng)(feng)(feng)圈(quan)(quan)的(de)(de)(de)(de)研(yan)(yan)(yan)(yan)究(jiu)(jiu),對每(mei)個(ge)點(dian)的(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)上(shang)的(de)(de)(de)(de)道路和(he)(he)(he)相(xiang)對滑動(dong)的(de)(de)(de)(de)研(yan)(yan)(yan)(yan)究(jiu)(jiu)應該是(shi)一樣的(de)(de)(de)(de)。和(he)(he)(he)相(xiang)對運(yun)(yun)動(dong)方(fang)(fang)向(xiang)改(gai)變。改(gai)變密封(feng)(feng)(feng)環內(nei)的(de)(de)(de)(de)每(mei)個(ge)粒子(zi)的(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)上(shang)運(yun)(yun)動(dong)的(de)(de)(de)(de)方(fang)(fang)向(xiang)不(bu)(bu)會重(zhong)復他們(men)的(de)(de)(de)(de)軌跡(ji),以避免磨(mo)損明顯增加了(le)密封(feng)(feng)(feng)環的(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)粗(cu)糙度。此外,運(yun)(yun)動(dong)方(fang)(fang)向(xiang)的(de)(de)(de)(de)改(gai)變不(bu)(bu)能使(shi)磨(mo)粒分布比較均勻,且均勻切(qie)斷(duan)金屬(shu)密封(feng)(feng)(feng)環的(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)。
秀洲機械密封研(yan)(yan)(yan)(yan)磨(mo)是利用(yong)涂(tu)敷或者(zhe)壓(ya)(ya)(ya)嵌(qian)(qian)游離磨(mo)粒(li)與(yu)研(yan)(yan)(yan)(yan)磨(mo)劑(ji)的(de)(de)(de)(de)(de)混合(he)物(wu)(wu),在(zai)一定剛性(xing)的(de)(de)(de)(de)(de)軟質(zhi)研(yan)(yan)(yan)(yan)具(ju)(ju)上,通(tong)過研(yan)(yan)(yan)(yan)具(ju)(ju)與(yu)工(gong)件(jian)(jian)(jian)向磨(mo)料施加一定壓(ya)(ya)(ya)力(li),磨(mo)料滾(gun)動(dong)與(yu)滑(hua)動(dong),從被(bei)研(yan)(yan)(yan)(yan)磨(mo)工(gong)件(jian)(jian)(jian)上去除極(ji)薄的(de)(de)(de)(de)(de)余量(liang),以提高工(gong)件(jian)(jian)(jian)的(de)(de)(de)(de)(de)精度和(he)降低(di)表(biao)(biao)面(mian)(mian)(mian)粗糙(cao)度值得加工(gong)方(fang)法(fa)。按研(yan)(yan)(yan)(yan)磨(mo)時(shi)有無(wu)研(yan)(yan)(yan)(yan)磨(mo)液可(ke)分為(wei)干研(yan)(yan)(yan)(yan)與(yu)濕(shi)研(yan)(yan)(yan)(yan)。研(yan)(yan)(yan)(yan)磨(mo)過程(cheng)中,在(zai)研(yan)(yan)(yan)(yan)磨(mo)壓(ya)(ya)(ya)力(li)下,眾(zhong)多(duo)的(de)(de)(de)(de)(de)磨(mo)料微(wei)(wei)(wei)粒(li)進(jin)(jin)(jin)行微(wei)(wei)(wei)量(liang)切削(xue)。對(dui)工(gong)件(jian)(jian)(jian)表(biao)(biao)面(mian)(mian)(mian)進(jin)(jin)(jin)行擠壓(ya)(ya)(ya)、刻劃、滑(hua)擦;在(zai)研(yan)(yan)(yan)(yan)具(ju)(ju)運動(dong)中當研(yan)(yan)(yan)(yan)具(ju)(ju)壓(ya)(ya)(ya)嵌(qian)(qian)的(de)(de)(de)(de)(de)磨(mo)粒(li)脫落后及(ji)液中磨(mo)粒(li)相(xiang)對(dui)工(gong)件(jian)(jian)(jian)發生滾(gun)動(dong)。研(yan)(yan)(yan)(yan)磨(mo)過程(cheng)中,在(zai)研(yan)(yan)(yan)(yan)磨(mo)壓(ya)(ya)(ya)力(li)的(de)(de)(de)(de)(de)作(zuo)用(yong)下,眾(zhong)多(duo)磨(mo)粒(li)進(jin)(jin)(jin)行微(wei)(wei)(wei)量(liang)切削(xue),同時(shi)被(bei)研(yan)(yan)(yan)(yan)磨(mo)表(biao)(biao)面(mian)(mian)(mian)發生微(wei)(wei)(wei)小起(qi)伏的(de)(de)(de)(de)(de)塑性(xing)變形,并且被(bei)加入的(de)(de)(de)(de)(de)諸如(ru)硬脂酸、油酸、脂肪酸等活性(xing)物(wu)(wu)質(zhi)與(yu)被(bei)研(yan)(yan)(yan)(yan)磨(mo)表(biao)(biao)面(mian)(mian)(mian)起(qi)化學(xue)作(zuo)用(yong)。隨著研(yan)(yan)(yan)(yan)磨(mo)加工(gong)的(de)(de)(de)(de)(de)進(jin)(jin)(jin)行,磨(mo)具(ju)(ju)與(yu)工(gong)件(jian)(jian)(jian)表(biao)(biao)面(mian)(mian)(mian)間更趨貼近,其間充滿了微(wei)(wei)(wei)屑與(yu)破碎(sui)磨(mo)料的(de)(de)(de)(de)(de)碎(sui)渣,堵塞了研(yan)(yan)(yan)(yan)具(ju)(ju)表(biao)(biao)面(mian)(mian)(mian),對(dui)工(gong)件(jian)(jian)(jian)表(biao)(biao)面(mian)(mian)(mian)起(qi)滑(hua)擦作(zuo)用(yong)。所以,研(yan)(yan)(yan)(yan)磨(mo)加工(gong)的(de)(de)(de)(de)(de)實(shi)質(zhi)是磨(mo)粒(li)的(de)(de)(de)(de)(de)微(wei)(wei)(wei)量(liang)切削(xue)、研(yan)(yan)(yan)(yan)磨(mo)表(biao)(biao)面(mian)(mian)(mian)微(wei)(wei)(wei)小起(qi)伏的(de)(de)(de)(de)(de)塑性(xing)流(liu)動(dong)、表(biao)(biao)面(mian)(mian)(mian)活性(xing)物(wu)(wu)質(zhi)的(de)(de)(de)(de)(de)化學(xue)作(zuo)用(yong)及(ji)研(yan)(yan)(yan)(yan)具(ju)(ju)堵塞物(wu)(wu)與(yu)工(gong)件(jian)(jian)(jian)表(biao)(biao)面(mian)(mian)(mian)滑(hua)擦作(zuo)用(yong)的(de)(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秀洲機械密封將熱量傳給軸承(cheng),使軸承(cheng)溫度(du)升(sheng)高。為(wei)了(le)控制傳熱,所(suo)以密封的水也起到冷卻作用。
秀洲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秀洲機械密封低(di)壓(ya)側(大氣)將清水、蒸汽等冷(leng)(leng)卻(que)流體(ti)直接引(yin)入(ru)密(mi)封(feng)端(duan)泄露處的(de)一種冷(leng)(leng)卻(que)方式(shi),也(ye)稱急冷(leng)(leng),急冷(leng)(leng)不僅(jin)冷(leng)(leng)卻(que)*,還能將密(mi)封(feng)端(duan)面周圍的(de)雜質(zhi)(zhi)及泄露液(ye)帶(dai)走(zou),急冷(leng)(leng)液(ye)其壓(ya)力比密(mi)封(feng)介質(zhi)(zhi)壓(ya)力低(di)。急冷(leng)(leng)液(ye)應盡量采用軟水,以防止(zhi)水垢產生破壞密(mi)封(feng)端(duan)面。當(dang)密(mi)封(feng)流體(ti)為易(yi)凝固、易(yi)結晶時,可(ke)用蒸汽、溶劑等防止(zhi)流體(ti)凝結。