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發(fa)布時(shi)間:2021-12-17 11:54:31 人(ren)氣:93732 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,可以使成都機械密封摩擦端面尺寸精(jing)度提(ti)高,閥門的密封面,幾何(he)粗糙(cao)度和表面粗糙(cao)度,但不能提(ti)高密封表面的相互位(wei)置精(jing)度。
成都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,隨著對成都機械密封研(yan)究的(de)(de)(de)復雜面(mian)(mian),之(zhi)間的(de)(de)(de)表(biao)面(mian)(mian)和(he)密(mi)封(feng)(feng)(feng)磨(mo)料磨(mo)具(ju)研(yan)究相(xiang)(xiang)對運(yun)動(dong)時,密(mi)封(feng)(feng)(feng)圈(quan)表(biao)面(mian)(mian),磨(mo)料磨(mo)具(ju)研(yan)究部分和(he)密(mi)封(feng)(feng)(feng)面(mian)(mian)之(zhi)間的(de)(de)(de)滑動(dong)或(huo)滾動(dong),切(qie)斷(duan)密(mi)封(feng)(feng)(feng)圈(quan)上薄(bo)薄(bo)的(de)(de)(de)一層(ceng)金(jin)(jin)屬(shu)表(biao)面(mian)(mian)。密(mi)封(feng)(feng)(feng)凸峰部分的(de)(de)(de)圈(quan),表(biao)面(mian)(mian)研(yan)磨(mo),然后(hou)逐漸達到所(suo)要求的(de)(de)(de)幾何形狀(zhuang)。不(bu)僅是金(jin)(jin)屬(shu)磨(mo)料的(de)(de)(de)研(yan)磨(mo)加(jia)工,以及化學(xue)作用。研(yan)磨(mo)油可(ke)使加(jia)工表(biao)面(mian)(mian)形成的(de)(de)(de)氧化膜,從而加(jia)快研(yan)磨(mo)過(guo)程(cheng)。地(di)面(mian)(mian)運(yun)動(dong)相(xiang)(xiang)對運(yun)動(dong)的(de)(de)(de)表(biao)面(mian)(mian)和(he)密(mi)封(feng)(feng)(feng)圈(quan)密(mi)封(feng)(feng)(feng)圈(quan)的(de)(de)(de)研(yan)究,對每(mei)個點(dian)的(de)(de)(de)表(biao)面(mian)(mian)上的(de)(de)(de)道路和(he)相(xiang)(xiang)對滑動(dong)的(de)(de)(de)研(yan)究應該是一樣(yang)的(de)(de)(de)。和(he)相(xiang)(xiang)對運(yun)動(dong)方(fang)向改變。改變密(mi)封(feng)(feng)(feng)環(huan)內的(de)(de)(de)每(mei)個粒(li)子(zi)的(de)(de)(de)表(biao)面(mian)(mian)上運(yun)動(dong)的(de)(de)(de)方(fang)向不(bu)會(hui)重復他們(men)的(de)(de)(de)軌跡(ji),以避免磨(mo)損明顯增加(jia)了(le)密(mi)封(feng)(feng)(feng)環(huan)的(de)(de)(de)表(biao)面(mian)(mian)粗糙度。此(ci)外,運(yun)動(dong)方(fang)向的(de)(de)(de)改變不(bu)能使磨(mo)粒(li)分布(bu)比較均(jun)勻(yun),且(qie)均(jun)勻(yun)切(qie)斷(duan)金(jin)(jin)屬(shu)密(mi)封(feng)(feng)(feng)環(huan)的(de)(de)(de)表(biao)面(mian)(mian)。
成都機械密封研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)是利用涂敷或者壓(ya)(ya)嵌(qian)游離磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)與(yu)(yu)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)劑的(de)(de)(de)(de)混合物,在(zai)一定(ding)剛性(xing)(xing)的(de)(de)(de)(de)軟(ruan)質(zhi)研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)上,通過(guo)研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)與(yu)(yu)工(gong)(gong)(gong)件向磨(mo)(mo)(mo)(mo)(mo)料施加(jia)一定(ding)壓(ya)(ya)力(li),磨(mo)(mo)(mo)(mo)(mo)料滾(gun)動(dong)與(yu)(yu)滑動(dong),從被(bei)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)工(gong)(gong)(gong)件上去除極薄(bo)的(de)(de)(de)(de)余量(liang),以提(ti)高工(gong)(gong)(gong)件的(de)(de)(de)(de)精度(du)和(he)降(jiang)低表(biao)(biao)面(mian)(mian)粗糙度(du)值得加(jia)工(gong)(gong)(gong)方法。按研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)時有無研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)液可分為干研(yan)(yan)(yan)(yan)(yan)與(yu)(yu)濕研(yan)(yan)(yan)(yan)(yan)。研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過(guo)程中,在(zai)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓(ya)(ya)力(li)下,眾多的(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)料微(wei)(wei)粒(li)(li)進行微(wei)(wei)量(liang)切削(xue)。對工(gong)(gong)(gong)件表(biao)(biao)面(mian)(mian)進行擠壓(ya)(ya)、刻劃、滑擦(ca);在(zai)研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)運動(dong)中當研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)壓(ya)(ya)嵌(qian)的(de)(de)(de)(de)磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)脫落后及(ji)液中磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)相對工(gong)(gong)(gong)件發生滾(gun)動(dong)。研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)過(guo)程中,在(zai)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)壓(ya)(ya)力(li)的(de)(de)(de)(de)作(zuo)(zuo)用下,眾多磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)進行微(wei)(wei)量(liang)切削(xue),同時被(bei)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)面(mian)(mian)發生微(wei)(wei)小(xiao)起(qi)(qi)(qi)伏(fu)的(de)(de)(de)(de)塑性(xing)(xing)變形,并且被(bei)加(jia)入的(de)(de)(de)(de)諸如硬脂(zhi)酸、油(you)酸、脂(zhi)肪酸等活性(xing)(xing)物質(zhi)與(yu)(yu)被(bei)研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)面(mian)(mian)起(qi)(qi)(qi)化學(xue)作(zuo)(zuo)用。隨著研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)(gong)(gong)的(de)(de)(de)(de)進行,磨(mo)(mo)(mo)(mo)(mo)具(ju)(ju)與(yu)(yu)工(gong)(gong)(gong)件表(biao)(biao)面(mian)(mian)間更趨貼近,其間充(chong)滿(man)了微(wei)(wei)屑(xie)與(yu)(yu)破碎(sui)(sui)磨(mo)(mo)(mo)(mo)(mo)料的(de)(de)(de)(de)碎(sui)(sui)渣,堵塞(sai)了研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)表(biao)(biao)面(mian)(mian),對工(gong)(gong)(gong)件表(biao)(biao)面(mian)(mian)起(qi)(qi)(qi)滑擦(ca)作(zuo)(zuo)用。所以,研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)加(jia)工(gong)(gong)(gong)的(de)(de)(de)(de)實質(zhi)是磨(mo)(mo)(mo)(mo)(mo)粒(li)(li)的(de)(de)(de)(de)微(wei)(wei)量(liang)切削(xue)、研(yan)(yan)(yan)(yan)(yan)磨(mo)(mo)(mo)(mo)(mo)表(biao)(biao)面(mian)(mian)微(wei)(wei)小(xiao)起(qi)(qi)(qi)伏(fu)的(de)(de)(de)(de)塑性(xing)(xing)流動(dong)、表(biao)(biao)面(mian)(mian)活性(xing)(xing)物質(zhi)的(de)(de)(de)(de)化學(xue)作(zuo)(zuo)用及(ji)研(yan)(yan)(yan)(yan)(yan)具(ju)(ju)堵塞(sai)物與(yu)(yu)工(gong)(gong)(gong)件表(biao)(biao)面(mian)(mian)滑擦(ca)作(zuo)(zuo)用的(de)(de)(de)(de)綜(zong)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成都機械密封將熱量傳給(gei)軸承,使軸承溫(wen)度升高(gao)。為了控制傳熱,所以密封(feng)的水(shui)也(ye)起(qi)到冷卻作用。
成都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成都機械密封低(di)壓側(大氣)將清水(shui)、蒸汽等(deng)冷(leng)卻流(liu)體(ti)直接引入(ru)密(mi)封(feng)端(duan)泄露處的一種冷(leng)卻方式,也稱急(ji)冷(leng),急(ji)冷(leng)不僅冷(leng)卻*,還能將密(mi)封(feng)端(duan)面周(zhou)圍的雜質及(ji)泄露液(ye)帶走,急(ji)冷(leng)液(ye)其壓力(li)(li)比密(mi)封(feng)介質壓力(li)(li)低(di)。急(ji)冷(leng)液(ye)應(ying)盡量采用(yong)軟水(shui),以防止水(shui)垢產(chan)生(sheng)破壞(huai)密(mi)封(feng)端(duan)面。當密(mi)封(feng)流(liu)體(ti)為易凝固、易結晶時,可用(yong)蒸汽、溶劑等(deng)防止流(liu)體(ti)凝結。