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伽師研磨和冷卻對密封面都非常重要

發布時(shi)間:2021-12-17 11:54:31 人氣:97939 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,可以使伽師機械密封摩擦端(duan)面(mian)尺(chi)寸精度(du)提高,閥門的密封(feng)面(mian),幾何粗糙度(du)和表(biao)面(mian)粗糙度(du),但不能提高密封(feng)表(biao)面(mian)的相互位(wei)置精度(du)。


  伽師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,隨著對伽師機械密封研(yan)(yan)(yan)(yan)(yan)究(jiu)的(de)復(fu)雜面(mian)(mian)(mian),之間的(de)表(biao)(biao)(biao)面(mian)(mian)(mian)和(he)密(mi)(mi)封(feng)(feng)磨(mo)(mo)(mo)料磨(mo)(mo)(mo)具(ju)研(yan)(yan)(yan)(yan)(yan)究(jiu)相(xiang)對(dui)運動(dong)(dong)(dong)(dong)時,密(mi)(mi)封(feng)(feng)圈(quan)表(biao)(biao)(biao)面(mian)(mian)(mian),磨(mo)(mo)(mo)料磨(mo)(mo)(mo)具(ju)研(yan)(yan)(yan)(yan)(yan)究(jiu)部(bu)分和(he)密(mi)(mi)封(feng)(feng)面(mian)(mian)(mian)之間的(de)滑動(dong)(dong)(dong)(dong)或滾動(dong)(dong)(dong)(dong),切(qie)斷(duan)密(mi)(mi)封(feng)(feng)圈(quan)上(shang)薄(bo)薄(bo)的(de)一(yi)層(ceng)金屬表(biao)(biao)(biao)面(mian)(mian)(mian)。密(mi)(mi)封(feng)(feng)凸峰部(bu)分的(de)圈(quan),表(biao)(biao)(biao)面(mian)(mian)(mian)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo),然(ran)后逐漸(jian)達(da)到所要(yao)求的(de)幾(ji)何形狀(zhuang)。不(bu)僅(jin)是(shi)金屬磨(mo)(mo)(mo)料的(de)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)加(jia)工(gong)(gong),以(yi)及化學(xue)作用。研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)油可(ke)使(shi)加(jia)工(gong)(gong)表(biao)(biao)(biao)面(mian)(mian)(mian)形成的(de)氧(yang)化膜(mo),從(cong)而(er)加(jia)快研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)過程(cheng)。地面(mian)(mian)(mian)運動(dong)(dong)(dong)(dong)相(xiang)對(dui)運動(dong)(dong)(dong)(dong)的(de)表(biao)(biao)(biao)面(mian)(mian)(mian)和(he)密(mi)(mi)封(feng)(feng)圈(quan)密(mi)(mi)封(feng)(feng)圈(quan)的(de)研(yan)(yan)(yan)(yan)(yan)究(jiu),對(dui)每個點的(de)表(biao)(biao)(biao)面(mian)(mian)(mian)上(shang)的(de)道(dao)路和(he)相(xiang)對(dui)滑動(dong)(dong)(dong)(dong)的(de)研(yan)(yan)(yan)(yan)(yan)究(jiu)應該是(shi)一(yi)樣的(de)。和(he)相(xiang)對(dui)運動(dong)(dong)(dong)(dong)方(fang)向(xiang)改變(bian)(bian)(bian)。改變(bian)(bian)(bian)密(mi)(mi)封(feng)(feng)環內(nei)的(de)每個粒(li)子的(de)表(biao)(biao)(biao)面(mian)(mian)(mian)上(shang)運動(dong)(dong)(dong)(dong)的(de)方(fang)向(xiang)不(bu)會重(zhong)復(fu)他們的(de)軌跡,以(yi)避免磨(mo)(mo)(mo)損(sun)明(ming)顯增(zeng)加(jia)了密(mi)(mi)封(feng)(feng)環的(de)表(biao)(biao)(biao)面(mian)(mian)(mian)粗糙(cao)度。此外,運動(dong)(dong)(dong)(dong)方(fang)向(xiang)的(de)改變(bian)(bian)(bian)不(bu)能使(shi)磨(mo)(mo)(mo)粒(li)分布(bu)比較均勻(yun),且(qie)均勻(yun)切(qie)斷(duan)金屬密(mi)(mi)封(feng)(feng)環的(de)表(biao)(biao)(biao)面(mian)(mian)(mian)。

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  伽師機械密封研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)是利用(yong)(yong)涂敷或者壓嵌游離磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)與(yu)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)劑的(de)(de)(de)(de)(de)混合物(wu),在一定剛性的(de)(de)(de)(de)(de)軟(ruan)質(zhi)研(yan)(yan)(yan)(yan)具(ju)(ju)上,通過(guo)研(yan)(yan)(yan)(yan)具(ju)(ju)與(yu)工(gong)件(jian)向磨(mo)(mo)(mo)(mo)(mo)料(liao)(liao)施加(jia)一定壓力(li),磨(mo)(mo)(mo)(mo)(mo)料(liao)(liao)滾動(dong)與(yu)滑動(dong),從被研(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)余量,以提高工(gong)件(jian)的(de)(de)(de)(de)(de)精度和(he)降低表(biao)面(mian)(mian)(mian)粗糙度值得加(jia)工(gong)方(fang)法。按研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)時有無(wu)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)液可分為干研(yan)(yan)(yan)(yan)與(yu)濕(shi)研(yan)(yan)(yan)(yan)。研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過(guo)程中(zhong),在研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓力(li)下(xia),眾(zhong)多的(de)(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)料(liao)(liao)微(wei)粒(li)(li)進行微(wei)量切(qie)削(xue)。對工(gong)件(jian)表(biao)面(mian)(mian)(mian)進行擠壓、刻劃、滑擦;在研(yan)(yan)(yan)(yan)具(ju)(ju)運動(dong)中(zhong)當研(yan)(yan)(yan)(yan)具(ju)(ju)壓嵌的(de)(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)脫落后及(ji)液中(zhong)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)相對工(gong)件(jian)發生滾動(dong)。研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過(guo)程中(zhong),在研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓力(li)的(de)(de)(de)(de)(de)作(zuo)(zuo)用(yong)(yong)下(xia),眾(zhong)多磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)進行微(wei)量切(qie)削(xue),同時被研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)面(mian)(mian)(mian)發生微(wei)小起伏的(de)(de)(de)(de)(de)塑性變形,并且被加(jia)入的(de)(de)(de)(de)(de)諸如(ru)硬脂(zhi)酸、油酸、脂(zhi)肪酸等活(huo)性物(wu)質(zhi)與(yu)被研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)面(mian)(mian)(mian)起化學(xue)(xue)作(zuo)(zuo)用(yong)(yong)。隨著研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)的(de)(de)(de)(de)(de)進行,磨(mo)(mo)(mo)(mo)(mo)具(ju)(ju)與(yu)工(gong)件(jian)表(biao)面(mian)(mian)(mian)間更趨貼近,其間充滿了(le)微(wei)屑與(yu)破碎磨(mo)(mo)(mo)(mo)(mo)料(liao)(liao)的(de)(de)(de)(de)(de)碎渣(zha),堵塞了(le)研(yan)(yan)(yan)(yan)具(ju)(ju)表(biao)面(mian)(mian)(mian),對工(gong)件(jian)表(biao)面(mian)(mian)(mian)起滑擦作(zuo)(zuo)用(yong)(yong)。所(suo)以,研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)的(de)(de)(de)(de)(de)實質(zhi)是磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)的(de)(de)(de)(de)(de)微(wei)量切(qie)削(xue)、研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)面(mian)(mian)(mian)微(wei)小起伏的(de)(de)(de)(de)(de)塑性流(liu)動(dong)、表(biao)面(mian)(mian)(mian)活(huo)性物(wu)質(zhi)的(de)(de)(de)(de)(de)化學(xue)(xue)作(zuo)(zuo)用(yong)(yong)及(ji)研(yan)(yan)(yan)(yan)具(ju)(ju)堵塞物(wu)與(yu)工(gong)件(jian)表(biao)面(mian)(mian)(mian)滑擦作(zuo)(zuo)用(yong)(yong)的(de)(de)(de)(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伽師機械密封將(jiang)熱(re)量傳給軸(zhou)承(cheng),使軸(zhou)承(cheng)溫度升高(gao)。為了控制傳熱(re),所以(yi)密封的(de)水(shui)也起(qi)到(dao)冷卻作(zuo)用。


  伽師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伽師機械密封低壓(ya)(ya)側(大氣)將清(qing)水、蒸汽等(deng)冷(leng)卻流體(ti)直接引入密(mi)封(feng)(feng)端(duan)泄(xie)露(lu)處的一種冷(leng)卻方式(shi),也稱急冷(leng),急冷(leng)不僅(jin)冷(leng)卻*,還能將密(mi)封(feng)(feng)端(duan)面周圍的雜質及泄(xie)露(lu)液(ye)帶走(zou),急冷(leng)液(ye)其壓(ya)(ya)力比密(mi)封(feng)(feng)介(jie)質壓(ya)(ya)力低。急冷(leng)液(ye)應盡量采用軟水,以防(fang)止水垢產生破壞密(mi)封(feng)(feng)端(duan)面。當密(mi)封(feng)(feng)流體(ti)為易凝固、易結(jie)晶(jing)時,可用蒸汽、溶劑等(deng)防(fang)止流體(ti)凝結(jie)。