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發布時間:2021-12-17 11:54:31 人氣:94012 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,可以使鳳翔機械密封摩擦端(duan)面尺寸精度(du)提高(gao),閥(fa)門的密封面,幾何(he)粗糙度(du)和表面粗糙度(du),但不能提高(gao)密封表面的相互位置精度(du)。
鳳翔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,隨著對鳳翔機械密封研(yan)究的(de)(de)(de)(de)(de)復雜面(mian)(mian),之間的(de)(de)(de)(de)(de)表面(mian)(mian)和(he)密(mi)封(feng)(feng)磨(mo)(mo)(mo)(mo)(mo)料磨(mo)(mo)(mo)(mo)(mo)具(ju)(ju)研(yan)究相對運動(dong)(dong)時,密(mi)封(feng)(feng)圈表面(mian)(mian),磨(mo)(mo)(mo)(mo)(mo)料磨(mo)(mo)(mo)(mo)(mo)具(ju)(ju)研(yan)究部分和(he)密(mi)封(feng)(feng)面(mian)(mian)之間的(de)(de)(de)(de)(de)滑(hua)動(dong)(dong)或滾動(dong)(dong),切(qie)斷(duan)密(mi)封(feng)(feng)圈上薄薄的(de)(de)(de)(de)(de)一層金屬表面(mian)(mian)。密(mi)封(feng)(feng)凸(tu)峰部分的(de)(de)(de)(de)(de)圈,表面(mian)(mian)研(yan)磨(mo)(mo)(mo)(mo)(mo),然后逐漸達到所要求的(de)(de)(de)(de)(de)幾何形(xing)狀。不僅是金屬磨(mo)(mo)(mo)(mo)(mo)料的(de)(de)(de)(de)(de)研(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)工,以(yi)(yi)及化學作用(yong)。研(yan)磨(mo)(mo)(mo)(mo)(mo)油可使(shi)加(jia)工表面(mian)(mian)形(xing)成的(de)(de)(de)(de)(de)氧化膜,從而加(jia)快研(yan)磨(mo)(mo)(mo)(mo)(mo)過程。地面(mian)(mian)運動(dong)(dong)相對運動(dong)(dong)的(de)(de)(de)(de)(de)表面(mian)(mian)和(he)密(mi)封(feng)(feng)圈密(mi)封(feng)(feng)圈的(de)(de)(de)(de)(de)研(yan)究,對每個(ge)點的(de)(de)(de)(de)(de)表面(mian)(mian)上的(de)(de)(de)(de)(de)道(dao)路和(he)相對滑(hua)動(dong)(dong)的(de)(de)(de)(de)(de)研(yan)究應(ying)該(gai)是一樣(yang)的(de)(de)(de)(de)(de)。和(he)相對運動(dong)(dong)方(fang)向改(gai)變。改(gai)變密(mi)封(feng)(feng)環(huan)(huan)內的(de)(de)(de)(de)(de)每個(ge)粒子的(de)(de)(de)(de)(de)表面(mian)(mian)上運動(dong)(dong)的(de)(de)(de)(de)(de)方(fang)向不會重復他(ta)們的(de)(de)(de)(de)(de)軌跡,以(yi)(yi)避免(mian)磨(mo)(mo)(mo)(mo)(mo)損明顯增加(jia)了(le)密(mi)封(feng)(feng)環(huan)(huan)的(de)(de)(de)(de)(de)表面(mian)(mian)粗糙度。此外,運動(dong)(dong)方(fang)向的(de)(de)(de)(de)(de)改(gai)變不能使(shi)磨(mo)(mo)(mo)(mo)(mo)粒分布比較均勻,且均勻切(qie)斷(duan)金屬密(mi)封(feng)(feng)環(huan)(huan)的(de)(de)(de)(de)(de)表面(mian)(mian)。
鳳翔機械密封研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)是利用(yong)(yong)涂敷或者壓(ya)嵌游(you)離磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)與(yu)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)劑的(de)(de)混合(he)物,在一(yi)定(ding)(ding)剛性(xing)的(de)(de)軟質研(yan)(yan)(yan)(yan)(yan)具(ju)上,通過研(yan)(yan)(yan)(yan)(yan)具(ju)與(yu)工(gong)(gong)(gong)(gong)件(jian)向磨(mo)(mo)(mo)(mo)(mo)料(liao)施加(jia)一(yi)定(ding)(ding)壓(ya)力(li),磨(mo)(mo)(mo)(mo)(mo)料(liao)滾動與(yu)滑動,從(cong)被研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)工(gong)(gong)(gong)(gong)件(jian)上去(qu)除極薄(bo)的(de)(de)余量(liang)(liang),以提高工(gong)(gong)(gong)(gong)件(jian)的(de)(de)精度和降低表面(mian)(mian)粗糙度值得加(jia)工(gong)(gong)(gong)(gong)方法。按研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)時(shi)有無研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)液(ye)可分為(wei)干研(yan)(yan)(yan)(yan)(yan)與(yu)濕研(yan)(yan)(yan)(yan)(yan)。研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過程中(zhong)(zhong),在研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓(ya)力(li)下,眾多(duo)的(de)(de)磨(mo)(mo)(mo)(mo)(mo)料(liao)微(wei)(wei)(wei)粒(li)(li)進(jin)(jin)行微(wei)(wei)(wei)量(liang)(liang)切削。對(dui)工(gong)(gong)(gong)(gong)件(jian)表面(mian)(mian)進(jin)(jin)行擠壓(ya)、刻劃、滑擦;在研(yan)(yan)(yan)(yan)(yan)具(ju)運動中(zhong)(zhong)當研(yan)(yan)(yan)(yan)(yan)具(ju)壓(ya)嵌的(de)(de)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)脫(tuo)落后及(ji)(ji)液(ye)中(zhong)(zhong)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)相對(dui)工(gong)(gong)(gong)(gong)件(jian)發(fa)生(sheng)滾動。研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過程中(zhong)(zhong),在研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓(ya)力(li)的(de)(de)作(zuo)用(yong)(yong)下,眾多(duo)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)進(jin)(jin)行微(wei)(wei)(wei)量(liang)(liang)切削,同時(shi)被研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表面(mian)(mian)發(fa)生(sheng)微(wei)(wei)(wei)小(xiao)起(qi)(qi)伏(fu)(fu)的(de)(de)塑性(xing)變形,并且被加(jia)入的(de)(de)諸如硬脂酸(suan)、油酸(suan)、脂肪(fang)酸(suan)等(deng)活(huo)性(xing)物質與(yu)被研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表面(mian)(mian)起(qi)(qi)化學(xue)作(zuo)用(yong)(yong)。隨著研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)(gong)(gong)(gong)的(de)(de)進(jin)(jin)行,磨(mo)(mo)(mo)(mo)(mo)具(ju)與(yu)工(gong)(gong)(gong)(gong)件(jian)表面(mian)(mian)間更(geng)趨貼近,其間充滿了微(wei)(wei)(wei)屑(xie)與(yu)破碎(sui)磨(mo)(mo)(mo)(mo)(mo)料(liao)的(de)(de)碎(sui)渣,堵(du)塞了研(yan)(yan)(yan)(yan)(yan)具(ju)表面(mian)(mian),對(dui)工(gong)(gong)(gong)(gong)件(jian)表面(mian)(mian)起(qi)(qi)滑擦作(zuo)用(yong)(yong)。所以,研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)(gong)(gong)(gong)的(de)(de)實(shi)質是磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)的(de)(de)微(wei)(wei)(wei)量(liang)(liang)切削、研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表面(mian)(mian)微(wei)(wei)(wei)小(xiao)起(qi)(qi)伏(fu)(fu)的(de)(de)塑性(xing)流動、表面(mian)(mian)活(huo)性(xing)物質的(de)(de)化學(xue)作(zuo)用(yong)(yong)及(ji)(ji)研(yan)(yan)(yan)(yan)(yan)具(ju)堵(du)塞物與(yu)工(gong)(gong)(gong)(gong)件(jian)表面(mian)(mian)滑擦作(zuo)用(yong)(yong)的(de)(de)綜(zong)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鳳翔機械密封將熱量傳(chuan)給(gei)軸(zhou)(zhou)承,使(shi)軸(zhou)(zhou)承溫(wen)度升高。為(wei)了控(kong)制傳(chuan)熱,所以(yi)密(mi)封的水也起到冷卻作用(yong)。
鳳翔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鳳翔機械密封低壓(ya)側(大(da)氣)將清水(shui)(shui)、蒸汽等(deng)冷(leng)(leng)卻(que)流體直接引入密(mi)(mi)封(feng)端(duan)(duan)泄露處(chu)的一種冷(leng)(leng)卻(que)方式,也稱急冷(leng)(leng),急冷(leng)(leng)不僅冷(leng)(leng)卻(que)*,還能(neng)將密(mi)(mi)封(feng)端(duan)(duan)面(mian)(mian)周圍(wei)的雜質及泄露液帶走,急冷(leng)(leng)液其壓(ya)力比密(mi)(mi)封(feng)介質壓(ya)力低。急冷(leng)(leng)液應盡量采用軟水(shui)(shui),以防止水(shui)(shui)垢產生破壞密(mi)(mi)封(feng)端(duan)(duan)面(mian)(mian)。當密(mi)(mi)封(feng)流體為易凝固、易結(jie)晶時,可用蒸汽、溶(rong)劑等(deng)防止流體凝結(jie)。