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發(fa)布時間(jian):2021-12-17 11:54:31 人氣:98120 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,可以使丹江口機械密封摩擦端面尺寸精(jing)度(du)提(ti)高,閥門(men)的(de)密封(feng)面,幾何粗(cu)糙度(du)和表(biao)面粗(cu)糙度(du),但(dan)不能提(ti)高密封(feng)表(biao)面的(de)相互位置精(jing)度(du)。
丹江口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,隨著對丹江口機械密封研(yan)(yan)(yan)(yan)究(jiu)(jiu)的(de)(de)(de)(de)復雜面(mian)(mian),之間的(de)(de)(de)(de)表(biao)面(mian)(mian)和(he)密(mi)(mi)(mi)封(feng)(feng)磨(mo)(mo)(mo)(mo)料(liao)磨(mo)(mo)(mo)(mo)具研(yan)(yan)(yan)(yan)究(jiu)(jiu)相(xiang)對(dui)運(yun)動(dong)(dong)時,密(mi)(mi)(mi)封(feng)(feng)圈表(biao)面(mian)(mian),磨(mo)(mo)(mo)(mo)料(liao)磨(mo)(mo)(mo)(mo)具研(yan)(yan)(yan)(yan)究(jiu)(jiu)部(bu)分(fen)和(he)密(mi)(mi)(mi)封(feng)(feng)面(mian)(mian)之間的(de)(de)(de)(de)滑動(dong)(dong)或滾動(dong)(dong),切(qie)斷密(mi)(mi)(mi)封(feng)(feng)圈上(shang)薄薄的(de)(de)(de)(de)一層金(jin)屬表(biao)面(mian)(mian)。密(mi)(mi)(mi)封(feng)(feng)凸峰部(bu)分(fen)的(de)(de)(de)(de)圈,表(biao)面(mian)(mian)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo),然(ran)后逐(zhu)漸達到所要(yao)求的(de)(de)(de)(de)幾(ji)何形狀。不(bu)僅是(shi)金(jin)屬磨(mo)(mo)(mo)(mo)料(liao)的(de)(de)(de)(de)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)加(jia)(jia)(jia)工(gong),以及化學作用。研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)油可使加(jia)(jia)(jia)工(gong)表(biao)面(mian)(mian)形成的(de)(de)(de)(de)氧化膜,從(cong)而加(jia)(jia)(jia)快(kuai)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)過程。地面(mian)(mian)運(yun)動(dong)(dong)相(xiang)對(dui)運(yun)動(dong)(dong)的(de)(de)(de)(de)表(biao)面(mian)(mian)和(he)密(mi)(mi)(mi)封(feng)(feng)圈密(mi)(mi)(mi)封(feng)(feng)圈的(de)(de)(de)(de)研(yan)(yan)(yan)(yan)究(jiu)(jiu),對(dui)每個點(dian)的(de)(de)(de)(de)表(biao)面(mian)(mian)上(shang)的(de)(de)(de)(de)道路和(he)相(xiang)對(dui)滑動(dong)(dong)的(de)(de)(de)(de)研(yan)(yan)(yan)(yan)究(jiu)(jiu)應(ying)該(gai)是(shi)一樣的(de)(de)(de)(de)。和(he)相(xiang)對(dui)運(yun)動(dong)(dong)方(fang)(fang)向(xiang)(xiang)改(gai)變。改(gai)變密(mi)(mi)(mi)封(feng)(feng)環(huan)內的(de)(de)(de)(de)每個粒子的(de)(de)(de)(de)表(biao)面(mian)(mian)上(shang)運(yun)動(dong)(dong)的(de)(de)(de)(de)方(fang)(fang)向(xiang)(xiang)不(bu)會重復他們的(de)(de)(de)(de)軌(gui)跡(ji),以避免磨(mo)(mo)(mo)(mo)損明顯增加(jia)(jia)(jia)了(le)密(mi)(mi)(mi)封(feng)(feng)環(huan)的(de)(de)(de)(de)表(biao)面(mian)(mian)粗糙(cao)度。此(ci)外,運(yun)動(dong)(dong)方(fang)(fang)向(xiang)(xiang)的(de)(de)(de)(de)改(gai)變不(bu)能使磨(mo)(mo)(mo)(mo)粒分(fen)布比較(jiao)均勻,且均勻切(qie)斷金(jin)屬密(mi)(mi)(mi)封(feng)(feng)環(huan)的(de)(de)(de)(de)表(biao)面(mian)(mian)。
丹江口機械密封研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)是利用(yong)涂(tu)敷或者壓嵌(qian)(qian)游離磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)與(yu)(yu)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)劑的(de)(de)(de)混合(he)物,在一(yi)定剛(gang)性的(de)(de)(de)軟質(zhi)研(yan)(yan)(yan)(yan)具(ju)上,通過研(yan)(yan)(yan)(yan)具(ju)與(yu)(yu)工(gong)件(jian)(jian)向磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)料施加(jia)(jia)一(yi)定壓力(li),磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)料滾動與(yu)(yu)滑動,從被(bei)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)工(gong)件(jian)(jian)上去(qu)除極薄(bo)的(de)(de)(de)余(yu)量,以提高工(gong)件(jian)(jian)的(de)(de)(de)精度和降(jiang)低表(biao)(biao)(biao)面(mian)(mian)粗糙度值得加(jia)(jia)工(gong)方法。按研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)時有無(wu)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)液可分為干研(yan)(yan)(yan)(yan)與(yu)(yu)濕研(yan)(yan)(yan)(yan)。研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)過程(cheng)(cheng)中(zhong)(zhong),在研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)壓力(li)下,眾多(duo)的(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)料微(wei)粒(li)(li)進(jin)行微(wei)量切削。對工(gong)件(jian)(jian)表(biao)(biao)(biao)面(mian)(mian)進(jin)行擠壓、刻劃、滑擦;在研(yan)(yan)(yan)(yan)具(ju)運動中(zhong)(zhong)當研(yan)(yan)(yan)(yan)具(ju)壓嵌(qian)(qian)的(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)脫落后(hou)及液中(zhong)(zhong)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)相對工(gong)件(jian)(jian)發生(sheng)滾動。研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)過程(cheng)(cheng)中(zhong)(zhong),在研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)壓力(li)的(de)(de)(de)作用(yong)下,眾多(duo)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)進(jin)行微(wei)量切削,同時被(bei)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面(mian)(mian)發生(sheng)微(wei)小(xiao)起伏的(de)(de)(de)塑性變形,并(bing)且被(bei)加(jia)(jia)入的(de)(de)(de)諸如硬(ying)脂酸、油酸、脂肪酸等(deng)活性物質(zhi)與(yu)(yu)被(bei)研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面(mian)(mian)起化(hua)(hua)學作用(yong)。隨(sui)著研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)加(jia)(jia)工(gong)的(de)(de)(de)進(jin)行,磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)具(ju)與(yu)(yu)工(gong)件(jian)(jian)表(biao)(biao)(biao)面(mian)(mian)間更趨(qu)貼近,其間充滿了微(wei)屑(xie)與(yu)(yu)破碎(sui)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)料的(de)(de)(de)碎(sui)渣(zha),堵(du)(du)塞(sai)了研(yan)(yan)(yan)(yan)具(ju)表(biao)(biao)(biao)面(mian)(mian),對工(gong)件(jian)(jian)表(biao)(biao)(biao)面(mian)(mian)起滑擦作用(yong)。所以,研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)加(jia)(jia)工(gong)的(de)(de)(de)實(shi)質(zhi)是磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)的(de)(de)(de)微(wei)量切削、研(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面(mian)(mian)微(wei)小(xiao)起伏的(de)(de)(de)塑性流動、表(biao)(biao)(biao)面(mian)(mian)活性物質(zhi)的(de)(de)(de)化(hua)(hua)學作用(yong)及研(yan)(yan)(yan)(yan)具(ju)堵(du)(du)塞(sai)物與(yu)(yu)工(gong)件(jian)(jian)表(biao)(biao)(biao)面(mian)(mian)滑擦作用(yong)的(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丹江口機械密封將熱(re)(re)量傳給軸承,使軸承溫度升高。為了(le)控制傳熱(re)(re),所以密(mi)封的水也起(qi)到冷卻(que)作用。
丹江口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丹江口機械密封低(di)(di)壓側(大氣)將(jiang)清水、蒸汽等冷(leng)(leng)卻(que)流(liu)體直接引入密(mi)(mi)(mi)封(feng)(feng)端(duan)(duan)泄露(lu)處的(de)一種(zhong)冷(leng)(leng)卻(que)方式,也稱急(ji)冷(leng)(leng),急(ji)冷(leng)(leng)不僅冷(leng)(leng)卻(que)*,還(huan)能將(jiang)密(mi)(mi)(mi)封(feng)(feng)端(duan)(duan)面(mian)周圍的(de)雜(za)質(zhi)及泄露(lu)液帶走(zou),急(ji)冷(leng)(leng)液其壓力比密(mi)(mi)(mi)封(feng)(feng)介質(zhi)壓力低(di)(di)。急(ji)冷(leng)(leng)液應盡量(liang)采用軟水,以防(fang)(fang)止水垢產生(sheng)破(po)壞密(mi)(mi)(mi)封(feng)(feng)端(duan)(duan)面(mian)。當密(mi)(mi)(mi)封(feng)(feng)流(liu)體為易凝固、易結晶時,可用蒸汽、溶劑(ji)等防(fang)(fang)止流(liu)體凝結。