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發(fa)布時間:2021-12-17 11:54:31 人(ren)氣(qi):98074 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,可以使洪山機械密封摩擦端面(mian)尺(chi)寸精度提高(gao),閥門的密封面(mian),幾何(he)粗糙度和(he)表面(mian)粗糙度,但不能提高(gao)密封表面(mian)的相互位置精度。
洪山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,隨著對洪山機械密封研究(jiu)(jiu)的(de)(de)(de)復(fu)雜面(mian)(mian),之(zhi)間的(de)(de)(de)表(biao)(biao)面(mian)(mian)和密封(feng)磨(mo)(mo)(mo)(mo)(mo)料(liao)磨(mo)(mo)(mo)(mo)(mo)具研究(jiu)(jiu)相(xiang)對運(yun)(yun)動(dong)(dong)(dong)時(shi),密封(feng)圈表(biao)(biao)面(mian)(mian),磨(mo)(mo)(mo)(mo)(mo)料(liao)磨(mo)(mo)(mo)(mo)(mo)具研究(jiu)(jiu)部(bu)分(fen)和密封(feng)面(mian)(mian)之(zhi)間的(de)(de)(de)滑(hua)動(dong)(dong)(dong)或滾動(dong)(dong)(dong),切斷密封(feng)圈上(shang)薄薄的(de)(de)(de)一層(ceng)金(jin)屬表(biao)(biao)面(mian)(mian)。密封(feng)凸峰部(bu)分(fen)的(de)(de)(de)圈,表(biao)(biao)面(mian)(mian)研磨(mo)(mo)(mo)(mo)(mo),然后逐漸達到所要求的(de)(de)(de)幾何形(xing)狀。不僅是(shi)金(jin)屬磨(mo)(mo)(mo)(mo)(mo)料(liao)的(de)(de)(de)研磨(mo)(mo)(mo)(mo)(mo)加工(gong)(gong),以(yi)及化學作用。研磨(mo)(mo)(mo)(mo)(mo)油可使加工(gong)(gong)表(biao)(biao)面(mian)(mian)形(xing)成的(de)(de)(de)氧化膜(mo),從而加快研磨(mo)(mo)(mo)(mo)(mo)過程(cheng)。地面(mian)(mian)運(yun)(yun)動(dong)(dong)(dong)相(xiang)對運(yun)(yun)動(dong)(dong)(dong)的(de)(de)(de)表(biao)(biao)面(mian)(mian)和密封(feng)圈密封(feng)圈的(de)(de)(de)研究(jiu)(jiu),對每個點(dian)的(de)(de)(de)表(biao)(biao)面(mian)(mian)上(shang)的(de)(de)(de)道路和相(xiang)對滑(hua)動(dong)(dong)(dong)的(de)(de)(de)研究(jiu)(jiu)應該是(shi)一樣的(de)(de)(de)。和相(xiang)對運(yun)(yun)動(dong)(dong)(dong)方向改(gai)變。改(gai)變密封(feng)環(huan)內的(de)(de)(de)每個粒(li)子的(de)(de)(de)表(biao)(biao)面(mian)(mian)上(shang)運(yun)(yun)動(dong)(dong)(dong)的(de)(de)(de)方向不會重復(fu)他們的(de)(de)(de)軌跡,以(yi)避(bi)免(mian)磨(mo)(mo)(mo)(mo)(mo)損明顯增加了密封(feng)環(huan)的(de)(de)(de)表(biao)(biao)面(mian)(mian)粗(cu)糙度。此外,運(yun)(yun)動(dong)(dong)(dong)方向的(de)(de)(de)改(gai)變不能使磨(mo)(mo)(mo)(mo)(mo)粒(li)分(fen)布比(bi)較均勻(yun)(yun),且均勻(yun)(yun)切斷金(jin)屬密封(feng)環(huan)的(de)(de)(de)表(biao)(biao)面(mian)(mian)。
洪山機械密封研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)是利用(yong)(yong)(yong)涂(tu)敷(fu)或者壓(ya)嵌(qian)游離(li)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)與研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)劑的(de)(de)(de)混合(he)物(wu)(wu),在一定(ding)剛(gang)性(xing)的(de)(de)(de)軟質研(yan)(yan)(yan)具(ju)上,通過研(yan)(yan)(yan)具(ju)與工(gong)(gong)件(jian)(jian)(jian)(jian)向磨(mo)(mo)(mo)(mo)(mo)料(liao)施加(jia)一定(ding)壓(ya)力,磨(mo)(mo)(mo)(mo)(mo)料(liao)滾動(dong)與滑動(dong),從被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)工(gong)(gong)件(jian)(jian)(jian)(jian)上去除極薄的(de)(de)(de)余量,以(yi)(yi)提高工(gong)(gong)件(jian)(jian)(jian)(jian)的(de)(de)(de)精度(du)和降低表(biao)(biao)(biao)面粗糙度(du)值得(de)加(jia)工(gong)(gong)方法。按(an)研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)時有無研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)液可分為干(gan)研(yan)(yan)(yan)與濕研(yan)(yan)(yan)。研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過程中(zhong),在研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓(ya)力下,眾多(duo)(duo)的(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)料(liao)微(wei)粒(li)(li)進行(xing)微(wei)量切削(xue)。對工(gong)(gong)件(jian)(jian)(jian)(jian)表(biao)(biao)(biao)面進行(xing)擠壓(ya)、刻(ke)劃、滑擦;在研(yan)(yan)(yan)具(ju)運動(dong)中(zhong)當(dang)研(yan)(yan)(yan)具(ju)壓(ya)嵌(qian)的(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)脫(tuo)落后及液中(zhong)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)相對工(gong)(gong)件(jian)(jian)(jian)(jian)發(fa)生(sheng)滾動(dong)。研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過程中(zhong),在研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓(ya)力的(de)(de)(de)作(zuo)(zuo)(zuo)用(yong)(yong)(yong)下,眾多(duo)(duo)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)進行(xing)微(wei)量切削(xue),同時被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面發(fa)生(sheng)微(wei)小(xiao)起(qi)伏的(de)(de)(de)塑性(xing)變(bian)形,并且被加(jia)入的(de)(de)(de)諸(zhu)如硬脂酸、油酸、脂肪(fang)酸等活(huo)性(xing)物(wu)(wu)質與被研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面起(qi)化(hua)學(xue)作(zuo)(zuo)(zuo)用(yong)(yong)(yong)。隨(sui)著研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)(gong)的(de)(de)(de)進行(xing),磨(mo)(mo)(mo)(mo)(mo)具(ju)與工(gong)(gong)件(jian)(jian)(jian)(jian)表(biao)(biao)(biao)面間更趨(qu)貼近,其間充滿了(le)微(wei)屑與破碎(sui)磨(mo)(mo)(mo)(mo)(mo)料(liao)的(de)(de)(de)碎(sui)渣,堵(du)塞(sai)了(le)研(yan)(yan)(yan)具(ju)表(biao)(biao)(biao)面,對工(gong)(gong)件(jian)(jian)(jian)(jian)表(biao)(biao)(biao)面起(qi)滑擦作(zuo)(zuo)(zuo)用(yong)(yong)(yong)。所以(yi)(yi),研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)(gong)的(de)(de)(de)實質是磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)的(de)(de)(de)微(wei)量切削(xue)、研(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)面微(wei)小(xiao)起(qi)伏的(de)(de)(de)塑性(xing)流動(dong)、表(biao)(biao)(biao)面活(huo)性(xing)物(wu)(wu)質的(de)(de)(de)化(hua)學(xue)作(zuo)(zuo)(zuo)用(yong)(yong)(yong)及研(yan)(yan)(yan)具(ju)堵(du)塞(sai)物(wu)(wu)與工(gong)(gong)件(jian)(jian)(jian)(jian)表(biao)(biao)(biao)面滑擦作(zuo)(zuo)(zuo)用(yong)(yong)(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洪山機械密封將熱量傳(chuan)(chuan)給軸承,使軸承溫度升高。為了控(kong)制傳(chuan)(chuan)熱,所以(yi)密封的水(shui)也(ye)起(qi)到冷(leng)卻作用。
洪山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洪山機械密封低壓側(大氣)將(jiang)(jiang)清水、蒸(zheng)汽等(deng)冷(leng)(leng)卻(que)流(liu)體(ti)直接引入密(mi)封端(duan)(duan)泄露處的(de)一(yi)種冷(leng)(leng)卻(que)方式(shi),也稱急冷(leng)(leng),急冷(leng)(leng)不僅冷(leng)(leng)卻(que)*,還(huan)能將(jiang)(jiang)密(mi)封端(duan)(duan)面周圍的(de)雜質及泄露液(ye)帶走,急冷(leng)(leng)液(ye)其(qi)壓力比(bi)密(mi)封介質壓力低。急冷(leng)(leng)液(ye)應盡量采用軟水,以(yi)防止(zhi)水垢產生破壞密(mi)封端(duan)(duan)面。當密(mi)封流(liu)體(ti)為易(yi)凝固、易(yi)結晶時(shi),可用蒸(zheng)汽、溶劑等(deng)防止(zhi)流(liu)體(ti)凝結。