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發(fa)布時間:2021-12-17 11:54:31 人氣:97962 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,可以使麗水機械密封摩(mo)擦(ca)端面尺寸精(jing)度提高,閥門的(de)密封(feng)面,幾何粗糙(cao)度和表面粗糙(cao)度,但不(bu)能提高密封(feng)表面的(de)相(xiang)互位置精(jing)度。
麗水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,隨著對麗水機械密封研(yan)(yan)(yan)究(jiu)的(de)(de)(de)(de)(de)復(fu)雜面(mian)(mian),之間(jian)的(de)(de)(de)(de)(de)表(biao)(biao)面(mian)(mian)和密(mi)封(feng)(feng)磨(mo)料(liao)(liao)磨(mo)具研(yan)(yan)(yan)究(jiu)相對(dui)(dui)運(yun)動(dong)(dong)時(shi),密(mi)封(feng)(feng)圈(quan)表(biao)(biao)面(mian)(mian),磨(mo)料(liao)(liao)磨(mo)具研(yan)(yan)(yan)究(jiu)部分和密(mi)封(feng)(feng)面(mian)(mian)之間(jian)的(de)(de)(de)(de)(de)滑(hua)動(dong)(dong)或滾動(dong)(dong),切斷密(mi)封(feng)(feng)圈(quan)上薄薄的(de)(de)(de)(de)(de)一層金(jin)屬(shu)表(biao)(biao)面(mian)(mian)。密(mi)封(feng)(feng)凸(tu)峰(feng)部分的(de)(de)(de)(de)(de)圈(quan),表(biao)(biao)面(mian)(mian)研(yan)(yan)(yan)磨(mo),然后逐漸達到所要求的(de)(de)(de)(de)(de)幾何形狀(zhuang)。不僅(jin)是金(jin)屬(shu)磨(mo)料(liao)(liao)的(de)(de)(de)(de)(de)研(yan)(yan)(yan)磨(mo)加(jia)(jia)工,以及化學作用。研(yan)(yan)(yan)磨(mo)油可使(shi)加(jia)(jia)工表(biao)(biao)面(mian)(mian)形成的(de)(de)(de)(de)(de)氧化膜,從而加(jia)(jia)快研(yan)(yan)(yan)磨(mo)過程。地面(mian)(mian)運(yun)動(dong)(dong)相對(dui)(dui)運(yun)動(dong)(dong)的(de)(de)(de)(de)(de)表(biao)(biao)面(mian)(mian)和密(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),對(dui)(dui)每(mei)個(ge)點的(de)(de)(de)(de)(de)表(biao)(biao)面(mian)(mian)上的(de)(de)(de)(de)(de)道路(lu)和相對(dui)(dui)滑(hua)動(dong)(dong)的(de)(de)(de)(de)(de)研(yan)(yan)(yan)究(jiu)應該(gai)是一樣的(de)(de)(de)(de)(de)。和相對(dui)(dui)運(yun)動(dong)(dong)方向(xiang)改變(bian)。改變(bian)密(mi)封(feng)(feng)環內的(de)(de)(de)(de)(de)每(mei)個(ge)粒子(zi)的(de)(de)(de)(de)(de)表(biao)(biao)面(mian)(mian)上運(yun)動(dong)(dong)的(de)(de)(de)(de)(de)方向(xiang)不會重復(fu)他們的(de)(de)(de)(de)(de)軌跡,以避免(mian)磨(mo)損明顯增加(jia)(jia)了(le)密(mi)封(feng)(feng)環的(de)(de)(de)(de)(de)表(biao)(biao)面(mian)(mian)粗糙度。此外,運(yun)動(dong)(dong)方向(xiang)的(de)(de)(de)(de)(de)改變(bian)不能使(shi)磨(mo)粒分布比較均勻,且均勻切斷金(jin)屬(shu)密(mi)封(feng)(feng)環的(de)(de)(de)(de)(de)表(biao)(biao)面(mian)(mian)。
麗水機械密封研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)是利用涂敷或者壓(ya)嵌游離(li)磨(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)(li)與(yu)(yu)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)劑的(de)(de)混合(he)物(wu),在一(yi)定剛(gang)性的(de)(de)軟質(zhi)(zhi)研(yan)(yan)(yan)(yan)(yan)具上,通過(guo)研(yan)(yan)(yan)(yan)(yan)具與(yu)(yu)工(gong)(gong)(gong)(gong)件(jian)向磨(mo)(mo)(mo)(mo)(mo)(mo)料施加(jia)一(yi)定壓(ya)力,磨(mo)(mo)(mo)(mo)(mo)(mo)料滾動與(yu)(yu)滑動,從被(bei)(bei)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)工(gong)(gong)(gong)(gong)件(jian)上去除極薄的(de)(de)余量(liang),以(yi)(yi)提高工(gong)(gong)(gong)(gong)件(jian)的(de)(de)精度(du)和降(jiang)低表(biao)(biao)(biao)(biao)面(mian)(mian)粗糙度(du)值得加(jia)工(gong)(gong)(gong)(gong)方法(fa)。按研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)時有(you)無研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)液(ye)可分為干研(yan)(yan)(yan)(yan)(yan)與(yu)(yu)濕(shi)研(yan)(yan)(yan)(yan)(yan)。研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)過(guo)程(cheng)中(zhong)(zhong),在研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)壓(ya)力下,眾多的(de)(de)磨(mo)(mo)(mo)(mo)(mo)(mo)料微(wei)粒(li)(li)(li)進(jin)行(xing)微(wei)量(liang)切(qie)削(xue)。對工(gong)(gong)(gong)(gong)件(jian)表(biao)(biao)(biao)(biao)面(mian)(mian)進(jin)行(xing)擠壓(ya)、刻劃、滑擦;在研(yan)(yan)(yan)(yan)(yan)具運動中(zhong)(zhong)當研(yan)(yan)(yan)(yan)(yan)具壓(ya)嵌的(de)(de)磨(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)(li)脫落后及(ji)液(ye)中(zhong)(zhong)磨(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)(li)相對工(gong)(gong)(gong)(gong)件(jian)發(fa)(fa)生滾動。研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)過(guo)程(cheng)中(zhong)(zhong),在研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)壓(ya)力的(de)(de)作(zuo)用下,眾多磨(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)(li)進(jin)行(xing)微(wei)量(liang)切(qie)削(xue),同時被(bei)(bei)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)(biao)面(mian)(mian)發(fa)(fa)生微(wei)小起(qi)(qi)伏的(de)(de)塑性變形,并且被(bei)(bei)加(jia)入的(de)(de)諸如硬脂酸、油酸、脂肪酸等活性物(wu)質(zhi)(zhi)與(yu)(yu)被(bei)(bei)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)(biao)面(mian)(mian)起(qi)(qi)化(hua)學作(zuo)用。隨著研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)(gong)(gong)(gong)的(de)(de)進(jin)行(xing),磨(mo)(mo)(mo)(mo)(mo)(mo)具與(yu)(yu)工(gong)(gong)(gong)(gong)件(jian)表(biao)(biao)(biao)(biao)面(mian)(mian)間更趨貼近,其間充(chong)滿了微(wei)屑與(yu)(yu)破碎(sui)(sui)磨(mo)(mo)(mo)(mo)(mo)(mo)料的(de)(de)碎(sui)(sui)渣,堵(du)塞(sai)了研(yan)(yan)(yan)(yan)(yan)具表(biao)(biao)(biao)(biao)面(mian)(mian),對工(gong)(gong)(gong)(gong)件(jian)表(biao)(biao)(biao)(biao)面(mian)(mian)起(qi)(qi)滑擦作(zuo)用。所(suo)以(yi)(yi),研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)(gong)(gong)(gong)的(de)(de)實質(zhi)(zhi)是磨(mo)(mo)(mo)(mo)(mo)(mo)粒(li)(li)(li)的(de)(de)微(wei)量(liang)切(qie)削(xue)、研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)(mo)表(biao)(biao)(biao)(biao)面(mian)(mian)微(wei)小起(qi)(qi)伏的(de)(de)塑性流動、表(biao)(biao)(biao)(biao)面(mian)(mian)活性物(wu)質(zhi)(zhi)的(de)(de)化(hua)學作(zuo)用及(ji)研(yan)(yan)(yan)(yan)(yan)具堵(du)塞(sai)物(wu)與(yu)(yu)工(gong)(gong)(gong)(gong)件(jian)表(biao)(biao)(biao)(biao)面(mian)(mian)滑擦作(zuo)用的(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麗水機械密封將熱(re)(re)量傳給軸承,使軸承溫度升(sheng)高。為(wei)了控制傳熱(re)(re),所以密封的水(shui)也起到冷卻作用。
麗水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麗水機械密封低(di)壓(ya)側(大氣)將清(qing)水(shui)(shui)、蒸汽等冷卻流(liu)體(ti)直接引入密封端泄露處的一(yi)種冷卻方式,也稱(cheng)急冷,急冷不僅(jin)冷卻*,還能將密封端面周圍(wei)的雜質(zhi)及泄露液帶走,急冷液其壓(ya)力比密封介質(zhi)壓(ya)力低(di)。急冷液應盡量(liang)采用軟水(shui)(shui),以防止水(shui)(shui)垢產生破壞密封端面。當密封流(liu)體(ti)為易(yi)凝固、易(yi)結晶時(shi),可用蒸汽、溶劑等防止流(liu)體(ti)凝結。