今天(tian),小編讓大家了解旋片式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)在(zai)高速(su)造紙(zhi)機中(zhong)(zhong)的(de)(de)(de)(de)(de)(de)應用(yong)(yong)。真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)壓(ya)(ya)力(li)(li)(li)機主要用(yong)(yong)于中(zhong)(zhong)速(su)和高速(su)造紙(zhi)機,所用(yong)(yong)設備(bei)是旋片式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)。真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)壓(ya)(ya)機的(de)(de)(de)(de)(de)(de)上壓(ya)(ya)輥(gun)(gun)是石輥(gun)(gun),下壓(ya)(ya)輥(gun)(gun)是真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)壓(ya)(ya)輥(gun)(gun)。真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)壓(ya)(ya)輥(gun)(gun)的(de)(de)(de)(de)(de)(de)結構與真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)輥(gun)(gun)輥(gun)(gun)的(de)(de)(de)(de)(de)(de)結構基本(ben)相同(tong),真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)輥(gun)(gun)輥(gun)(gun)由青銅或不(bu)銹(xiu)鋼鑄造而成,輥(gun)(gun)殼的(de)(de)(de)(de)(de)(de)厚度(du)由所需的(de)(de)(de)(de)(de)(de)剛度(du)和強度(du)決定(ding)。造紙(zhi)機的(de)(de)(de)(de)(de)(de)其(qi)他工作參數,例如車輛速(su)度(du)和真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)度(du),是恒定(ding)的(de)(de)(de)(de)(de)(de),輥(gun)(gun)殼越(yue)(yue)厚,脫水(shui)能(neng)力(li)(li)(li)越(yue)(yue)小。在(zai)高速(su)造紙(zhi)過(guo)程中(zhong)(zhong),在(zai)毛氈和濕(shi)紙(zhi)被吸(xi)(xi)出(chu)后(hou),它(ta)會通過(guo)滾筒的(de)(de)(de)(de)(de)(de)孔(kong)眼,幾乎不(bu)可能(neng)到達真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)室然后(hou)通過(guo)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)吸(xi)(xi)附(fu)區,然后(hou)通過(guo)輥(gun)(gun)子的(de)(de)(de)(de)(de)(de)離心(xin)力(li)(li)(li)將(jiang)其(qi)投入(ru)白水(shui)盤。真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)室的(de)(de)(de)(de)(de)(de)功(gong)能(neng)僅用(yong)(yong)于吸(xi)(xi)入(ru)套(tao)管孔(kong)眼中(zhong)(zhong)的(de)(de)(de)(de)(de)(de)空(kong)(kong)(kong)氣(qi)。滾輪殼越(yue)(yue)厚,抽出(chu)的(de)(de)(de)(de)(de)(de)空(kong)(kong)(kong)氣(qi)量(liang)越(yue)(yue)大。因此,所使用(yong)(yong)的(de)(de)(de)(de)(de)(de)旋片式(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泵(beng)(beng)有(you)利于提高壓(ya)(ya)力(li)(li)(li)機的(de)(de)(de)(de)(de)(de)脫水(shui)效(xiao)率。
真(zhen)(zhen)空(kong)(kong)壓(ya)(ya)(ya)輥(gun)外殼覆蓋(gai)有(you)厚(hou)度(du)(du)為30至40mm的(de)橡膠。封(feng)裝的(de)優(you)點是均勻分(fen)布壓(ya)(ya)(ya)力,減(jian)少毛氈(zhan)的(de)磨損,并(bing)增(zeng)加(jia)沖(chong)壓(ya)(ya)(ya)線上的(de)壓(ya)(ya)(ya)力。生(sheng)產實踐(jian)表明,真(zhen)(zhen)空(kong)(kong)壓(ya)(ya)(ya)輥(gun)上孔(kong)(kong)的(de)軸向和圓周中(zhong)心距較小,眼(yan)孔(kong)(kong)數(shu)較多,可顯著提高真(zhen)(zhen)空(kong)(kong)壓(ya)(ya)(ya)輥(gun)的(de)脫水效果,從(cong)而有(you)效消(xiao)除壓(ya)(ya)(ya)花現象并(bing)延長毛氈(zhan)的(de)使用壽命。應適(shi)當選擇真(zhen)(zhen)空(kong)(kong)輥(gun)的(de)直徑(jing),以(yi)確(que)保輥(gun)具(ju)有(you)足(zu)夠(gou)大量的(de)脫水,并(bing)且開口(kou)將影響輥(gun)的(de)強度(du)(du)并(bing)在紙(zhi)上留下“陰影”。真(zhen)(zhen)空(kong)(kong)壓(ya)(ya)(ya)輥(gun)的(de)眼(yan)睛直徑(jing)通常(chang)約(yue)為4mm。
1.預脫水
濕紙頁首先進入(ru)由真(zhen)空(kong)吸(xi)入(ru)室(shi)組成(cheng)的(de)預脫水(shui)區(qu)。在旋(xuan)片(pian)(pian)式真(zhen)空(kong)泵的(de)抽吸(xi)力的(de)作用下(xia),空(kong)氣垂直(zhi)通過濕紙片(pian)(pian),毛氈進入(ru)真(zhen)空(kong)室(shi),一些水(shui)分(fen)被(bei)帶走(zou)。
2.混合脫水
濕(shi)紙頁進(jin)入混合(he)脫水(shui)區(qu),該脫水(shui)區(qu)由真空(kong)吸入區(qu)和(he)來自預脫水(shui)區(qu)的(de)正(zheng)壓區(qu)組成。在(zai)真空(kong)吸附和(he)增加輥(gun)壓力的(de)共同作用(yong)下(xia),紙張中的(de)水(shui)分垂直(zhi)通過濕(shi)紙張,并(bing)且橡皮布進(jin)入真空(kong)室(shi)并(bing)被排出。
3.防潮
在濕(shi)紙通(tong)過正(zheng)壓(ya)區之(zhi)后,由于壓(ya)力的逐漸減(jian)弱,毛氈和濕(shi)紙頁的毛細孔逐漸打開,相反,未排出的水被吸回。
真空脫(tuo)水(shui)適用(yong)于(yu)粒徑(jing)小,難(nan)以沉淀,特定通用(yong)粒徑(jing),過濾(lv)材料厚度可達3mm,連續抽濾(lv)和真空干燥的過濾(lv)機械。
本文主要(yao)介紹了廣東旋(xuan)片式(shi)真空(kong)泵在高(gao)速造紙機中的應(ying)用(yong)(yong)。真空(kong)泵具有(you)高(gao)速造紙機真空(kong)壓制功能(neng)。其主要(yao)特點是(shi)上輥為石(shi)輥,下輥為橡膠真空(kong)輥。脫水效率高(gao),紙幅干燥均勻(yun),壓制過程中破損少,對毛氈(zhan)有(you)清潔作用(yong)(yong),可延(yan)長毛氈(zhan)的使用(yong)(yong)壽命。
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