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合作研磨和冷卻對密封面都非常重要

發布時間(jian):2021-12-17 11:54:31 人氣:93949 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,可以使合作機械密封摩(mo)擦端面(mian)尺寸精(jing)度提高,閥門的(de)密封(feng)面(mian),幾何粗糙度和表(biao)(biao)面(mian)粗糙度,但不能(neng)提高密封(feng)表(biao)(biao)面(mian)的(de)相(xiang)互(hu)位(wei)置精(jing)度。


  合作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,隨著對合作機械密封研(yan)(yan)(yan)究(jiu)(jiu)的(de)(de)(de)(de)(de)復(fu)雜面(mian)(mian)(mian)(mian)(mian)(mian),之(zhi)間的(de)(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)(mian)和(he)(he)密(mi)封(feng)(feng)磨(mo)(mo)料磨(mo)(mo)具研(yan)(yan)(yan)究(jiu)(jiu)相(xiang)對(dui)(dui)運(yun)動時,密(mi)封(feng)(feng)圈(quan)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)(mian),磨(mo)(mo)料磨(mo)(mo)具研(yan)(yan)(yan)究(jiu)(jiu)部分(fen)(fen)和(he)(he)密(mi)封(feng)(feng)面(mian)(mian)(mian)(mian)(mian)(mian)之(zhi)間的(de)(de)(de)(de)(de)滑動或(huo)滾動,切(qie)斷(duan)密(mi)封(feng)(feng)圈(quan)上薄薄的(de)(de)(de)(de)(de)一(yi)層金(jin)屬(shu)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)(mian)。密(mi)封(feng)(feng)凸峰(feng)部分(fen)(fen)的(de)(de)(de)(de)(de)圈(quan),表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)(mian)研(yan)(yan)(yan)磨(mo)(mo),然(ran)后逐漸達到所要(yao)求(qiu)的(de)(de)(de)(de)(de)幾(ji)何形(xing)狀。不僅是(shi)金(jin)屬(shu)磨(mo)(mo)料的(de)(de)(de)(de)(de)研(yan)(yan)(yan)磨(mo)(mo)加工,以及(ji)化(hua)學(xue)作用。研(yan)(yan)(yan)磨(mo)(mo)油可(ke)使(shi)(shi)加工表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)(mian)形(xing)成的(de)(de)(de)(de)(de)氧(yang)化(hua)膜,從而加快研(yan)(yan)(yan)磨(mo)(mo)過程。地(di)面(mian)(mian)(mian)(mian)(mian)(mian)運(yun)動相(xiang)對(dui)(dui)運(yun)動的(de)(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)(mian)和(he)(he)密(mi)封(feng)(feng)圈(quan)密(mi)封(feng)(feng)圈(quan)的(de)(de)(de)(de)(de)研(yan)(yan)(yan)究(jiu)(jiu),對(dui)(dui)每個點的(de)(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)(mian)上的(de)(de)(de)(de)(de)道(dao)路(lu)和(he)(he)相(xiang)對(dui)(dui)滑動的(de)(de)(de)(de)(de)研(yan)(yan)(yan)究(jiu)(jiu)應(ying)該是(shi)一(yi)樣(yang)的(de)(de)(de)(de)(de)。和(he)(he)相(xiang)對(dui)(dui)運(yun)動方向改變(bian)。改變(bian)密(mi)封(feng)(feng)環(huan)(huan)內的(de)(de)(de)(de)(de)每個粒(li)子(zi)的(de)(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)(mian)上運(yun)動的(de)(de)(de)(de)(de)方向不會(hui)重(zhong)復(fu)他們的(de)(de)(de)(de)(de)軌跡,以避免磨(mo)(mo)損明顯增加了密(mi)封(feng)(feng)環(huan)(huan)的(de)(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)(mian)粗(cu)糙(cao)度。此外,運(yun)動方向的(de)(de)(de)(de)(de)改變(bian)不能使(shi)(shi)磨(mo)(mo)粒(li)分(fen)(fen)布比較均(jun)勻(yun),且均(jun)勻(yun)切(qie)斷(duan)金(jin)屬(shu)密(mi)封(feng)(feng)環(huan)(huan)的(de)(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)(mian)(mian)。

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  合作機械密封研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)是(shi)利用(yong)涂敷(fu)或者壓(ya)嵌游離磨(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)(li)與(yu)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)劑的(de)(de)(de)(de)(de)(de)混合物(wu)(wu),在(zai)一(yi)定(ding)剛性的(de)(de)(de)(de)(de)(de)軟質(zhi)研(yan)(yan)(yan)具(ju)上(shang),通(tong)過(guo)研(yan)(yan)(yan)具(ju)與(yu)工(gong)(gong)(gong)件向(xiang)磨(mo)(mo)(mo)(mo)(mo)(mo)料施加一(yi)定(ding)壓(ya)力,磨(mo)(mo)(mo)(mo)(mo)(mo)料滾動(dong)與(yu)滑動(dong),從被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)工(gong)(gong)(gong)件上(shang)去除極薄的(de)(de)(de)(de)(de)(de)余量,以提高工(gong)(gong)(gong)件的(de)(de)(de)(de)(de)(de)精(jing)度和降低表(biao)(biao)面(mian)粗糙(cao)度值得加工(gong)(gong)(gong)方法(fa)。按研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)時有無研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)液可分為干研(yan)(yan)(yan)與(yu)濕研(yan)(yan)(yan)。研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)過(guo)程(cheng)(cheng)中(zhong),在(zai)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)壓(ya)力下(xia),眾多(duo)的(de)(de)(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)(mo)料微粒(li)(li)(li)進(jin)行(xing)(xing)微量切削。對工(gong)(gong)(gong)件表(biao)(biao)面(mian)進(jin)行(xing)(xing)擠壓(ya)、刻(ke)劃、滑擦;在(zai)研(yan)(yan)(yan)具(ju)運動(dong)中(zhong)當研(yan)(yan)(yan)具(ju)壓(ya)嵌的(de)(de)(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)(li)脫落后及液中(zhong)磨(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)(li)相對工(gong)(gong)(gong)件發生(sheng)(sheng)滾動(dong)。研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)過(guo)程(cheng)(cheng)中(zhong),在(zai)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)壓(ya)力的(de)(de)(de)(de)(de)(de)作用(yong)下(xia),眾多(duo)磨(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)(li)進(jin)行(xing)(xing)微量切削,同時被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)面(mian)發生(sheng)(sheng)微小起(qi)伏的(de)(de)(de)(de)(de)(de)塑性變形,并且被加入的(de)(de)(de)(de)(de)(de)諸(zhu)如硬脂酸、油酸、脂肪酸等活(huo)性物(wu)(wu)質(zhi)與(yu)被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)面(mian)起(qi)化學作用(yong)。隨著研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)加工(gong)(gong)(gong)的(de)(de)(de)(de)(de)(de)進(jin)行(xing)(xing),磨(mo)(mo)(mo)(mo)(mo)(mo)具(ju)與(yu)工(gong)(gong)(gong)件表(biao)(biao)面(mian)間更趨(qu)貼(tie)近,其間充(chong)滿了(le)微屑(xie)與(yu)破碎(sui)磨(mo)(mo)(mo)(mo)(mo)(mo)料的(de)(de)(de)(de)(de)(de)碎(sui)渣,堵塞(sai)了(le)研(yan)(yan)(yan)具(ju)表(biao)(biao)面(mian),對工(gong)(gong)(gong)件表(biao)(biao)面(mian)起(qi)滑擦作用(yong)。所以,研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)加工(gong)(gong)(gong)的(de)(de)(de)(de)(de)(de)實質(zhi)是(shi)磨(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)(li)的(de)(de)(de)(de)(de)(de)微量切削、研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)面(mian)微小起(qi)伏的(de)(de)(de)(de)(de)(de)塑性流動(dong)、表(biao)(biao)面(mian)活(huo)性物(wu)(wu)質(zhi)的(de)(de)(de)(de)(de)(de)化學作用(yong)及研(yan)(yan)(yan)具(ju)堵塞(sai)物(wu)(wu)與(yu)工(gong)(gong)(gong)件表(biao)(biao)面(mian)滑擦作用(yong)的(de)(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合作機械密封將(jiang)熱量傳給軸承,使軸承溫(wen)度升高。為了控(kong)制傳熱,所以(yi)密封的水也起到冷卻作用。


  合作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合作機械密封低壓側(大氣)將(jiang)清水、蒸汽(qi)等冷卻流體直接(jie)引(yin)入(ru)密封端泄(xie)(xie)露處(chu)的一種(zhong)冷卻方式,也稱急(ji)(ji)冷,急(ji)(ji)冷不(bu)僅(jin)冷卻*,還(huan)能將(jiang)密封端面(mian)周圍的雜質及泄(xie)(xie)露液(ye)(ye)帶走,急(ji)(ji)冷液(ye)(ye)其壓力(li)比密封介質壓力(li)低。急(ji)(ji)冷液(ye)(ye)應盡量(liang)采用軟水,以防止水垢產生破壞密封端面(mian)。當密封流體為易(yi)凝固、易(yi)結(jie)晶(jing)時,可用蒸汽(qi)、溶劑等防止流體凝結(jie)。