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發布時間:2021-12-17 11:54:31 人氣:98045 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,可以使岷縣機械密封摩擦端面(mian)尺寸精度提(ti)高,閥門的密(mi)封面(mian),幾何粗糙度和表面(mian)粗糙度,但不能提(ti)高密(mi)封表面(mian)的相互位置精度。
岷縣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,隨著對岷縣機械密封研(yan)究的復(fu)雜面(mian),之(zhi)間的表(biao)(biao)面(mian)和(he)密(mi)(mi)(mi)(mi)封(feng)磨(mo)(mo)料(liao)(liao)磨(mo)(mo)具研(yan)究相對(dui)運(yun)動(dong)(dong)(dong)(dong)時,密(mi)(mi)(mi)(mi)封(feng)圈(quan)表(biao)(biao)面(mian),磨(mo)(mo)料(liao)(liao)磨(mo)(mo)具研(yan)究部(bu)分和(he)密(mi)(mi)(mi)(mi)封(feng)面(mian)之(zhi)間的滑動(dong)(dong)(dong)(dong)或滾動(dong)(dong)(dong)(dong),切(qie)斷密(mi)(mi)(mi)(mi)封(feng)圈(quan)上薄薄的一(yi)層金屬(shu)(shu)表(biao)(biao)面(mian)。密(mi)(mi)(mi)(mi)封(feng)凸峰(feng)部(bu)分的圈(quan),表(biao)(biao)面(mian)研(yan)磨(mo)(mo),然后逐漸達到(dao)所要求的幾何形(xing)狀。不僅是(shi)金屬(shu)(shu)磨(mo)(mo)料(liao)(liao)的研(yan)磨(mo)(mo)加工,以及(ji)化學作用。研(yan)磨(mo)(mo)油可使加工表(biao)(biao)面(mian)形(xing)成的氧化膜,從而加快(kuai)研(yan)磨(mo)(mo)過程。地面(mian)運(yun)動(dong)(dong)(dong)(dong)相對(dui)運(yun)動(dong)(dong)(dong)(dong)的表(biao)(biao)面(mian)和(he)密(mi)(mi)(mi)(mi)封(feng)圈(quan)密(mi)(mi)(mi)(mi)封(feng)圈(quan)的研(yan)究,對(dui)每個點的表(biao)(biao)面(mian)上的道(dao)路(lu)和(he)相對(dui)滑動(dong)(dong)(dong)(dong)的研(yan)究應(ying)該是(shi)一(yi)樣的。和(he)相對(dui)運(yun)動(dong)(dong)(dong)(dong)方向改(gai)變。改(gai)變密(mi)(mi)(mi)(mi)封(feng)環內的每個粒子的表(biao)(biao)面(mian)上運(yun)動(dong)(dong)(dong)(dong)的方向不會重復(fu)他(ta)們的軌(gui)跡,以避免磨(mo)(mo)損明顯增加了(le)密(mi)(mi)(mi)(mi)封(feng)環的表(biao)(biao)面(mian)粗糙度。此外,運(yun)動(dong)(dong)(dong)(dong)方向的改(gai)變不能使磨(mo)(mo)粒分布比較(jiao)均勻,且均勻切(qie)斷金屬(shu)(shu)密(mi)(mi)(mi)(mi)封(feng)環的表(biao)(biao)面(mian)。
岷縣機械密封研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)是利用(yong)涂敷或者壓(ya)嵌游離磨(mo)(mo)(mo)(mo)粒(li)(li)與研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)劑的(de)(de)(de)(de)(de)混(hun)合物(wu),在一定(ding)剛(gang)性(xing)的(de)(de)(de)(de)(de)軟質研(yan)(yan)(yan)具(ju)(ju)上,通過(guo)研(yan)(yan)(yan)具(ju)(ju)與工(gong)(gong)件(jian)向磨(mo)(mo)(mo)(mo)料(liao)(liao)(liao)施加(jia)一定(ding)壓(ya)力,磨(mo)(mo)(mo)(mo)料(liao)(liao)(liao)滾動與滑(hua)動,從被(bei)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)工(gong)(gong)件(jian)上去(qu)除極薄的(de)(de)(de)(de)(de)余量,以提高工(gong)(gong)件(jian)的(de)(de)(de)(de)(de)精度和(he)降(jiang)低表(biao)(biao)(biao)面粗糙(cao)度值得加(jia)工(gong)(gong)方法。按研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)時(shi)有無研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)液(ye)可分為干研(yan)(yan)(yan)與濕研(yan)(yan)(yan)。研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)過(guo)程(cheng)中(zhong),在研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)壓(ya)力下,眾(zhong)多的(de)(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)料(liao)(liao)(liao)微(wei)(wei)粒(li)(li)進(jin)行(xing)微(wei)(wei)量切削。對(dui)工(gong)(gong)件(jian)表(biao)(biao)(biao)面進(jin)行(xing)擠壓(ya)、刻劃、滑(hua)擦(ca);在研(yan)(yan)(yan)具(ju)(ju)運動中(zhong)當(dang)研(yan)(yan)(yan)具(ju)(ju)壓(ya)嵌的(de)(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)粒(li)(li)脫落后及液(ye)中(zhong)磨(mo)(mo)(mo)(mo)粒(li)(li)相對(dui)工(gong)(gong)件(jian)發生(sheng)滾動。研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)過(guo)程(cheng)中(zhong),在研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)壓(ya)力的(de)(de)(de)(de)(de)作用(yong)下,眾(zhong)多磨(mo)(mo)(mo)(mo)粒(li)(li)進(jin)行(xing)微(wei)(wei)量切削,同時(shi)被(bei)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面發生(sheng)微(wei)(wei)小(xiao)起(qi)伏的(de)(de)(de)(de)(de)塑性(xing)變形(xing),并且被(bei)加(jia)入的(de)(de)(de)(de)(de)諸如硬脂酸、油酸、脂肪酸等(deng)活(huo)性(xing)物(wu)質與被(bei)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面起(qi)化(hua)學(xue)作用(yong)。隨著研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)加(jia)工(gong)(gong)的(de)(de)(de)(de)(de)進(jin)行(xing),磨(mo)(mo)(mo)(mo)具(ju)(ju)與工(gong)(gong)件(jian)表(biao)(biao)(biao)面間(jian)更趨貼(tie)近,其(qi)間(jian)充滿了微(wei)(wei)屑與破(po)碎磨(mo)(mo)(mo)(mo)料(liao)(liao)(liao)的(de)(de)(de)(de)(de)碎渣,堵塞(sai)了研(yan)(yan)(yan)具(ju)(ju)表(biao)(biao)(biao)面,對(dui)工(gong)(gong)件(jian)表(biao)(biao)(biao)面起(qi)滑(hua)擦(ca)作用(yong)。所以,研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)加(jia)工(gong)(gong)的(de)(de)(de)(de)(de)實質是磨(mo)(mo)(mo)(mo)粒(li)(li)的(de)(de)(de)(de)(de)微(wei)(wei)量切削、研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面微(wei)(wei)小(xiao)起(qi)伏的(de)(de)(de)(de)(de)塑性(xing)流動、表(biao)(biao)(biao)面活(huo)性(xing)物(wu)質的(de)(de)(de)(de)(de)化(hua)學(xue)作用(yong)及研(yan)(yan)(yan)具(ju)(ju)堵塞(sai)物(wu)與工(gong)(gong)件(jian)表(biao)(biao)(biao)面滑(hua)擦(ca)作用(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岷縣機械密封將(jiang)熱(re)量傳給軸承(cheng),使軸承(cheng)溫度升高。為了控制(zhi)傳熱(re),所以密(mi)封的(de)水也起(qi)到冷卻作用(yong)。
岷縣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岷縣機械密封低壓(ya)側(大氣)將清水(shui)、蒸汽等冷(leng)(leng)卻(que)流(liu)體(ti)直接引入密(mi)(mi)(mi)封(feng)端泄露處(chu)的一種冷(leng)(leng)卻(que)方式,也(ye)稱急(ji)冷(leng)(leng),急(ji)冷(leng)(leng)不僅冷(leng)(leng)卻(que)*,還能(neng)將密(mi)(mi)(mi)封(feng)端面周圍的雜(za)質(zhi)及(ji)泄露液(ye)帶走,急(ji)冷(leng)(leng)液(ye)其壓(ya)力比密(mi)(mi)(mi)封(feng)介質(zhi)壓(ya)力低。急(ji)冷(leng)(leng)液(ye)應(ying)盡(jin)量采用(yong)軟水(shui),以防止水(shui)垢產生破(po)壞密(mi)(mi)(mi)封(feng)端面。當密(mi)(mi)(mi)封(feng)流(liu)體(ti)為易凝固、易結(jie)晶時,可用(yong)蒸汽、溶劑(ji)等防止流(liu)體(ti)凝結(jie)。