密相氣力輸送系列(lie)

氣力輸送原理

氣(qi)(qi)力(li)(li)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)系統可分(fen)類為(wei)(wei)不(bu)同的(de)(de)(de)(de)(de)(de)(de)(de)流(liu)(liu)動(dong)型式(shi)(shi)(shi)，其中(zhong)兩(liang)種主要型式(shi)(shi)(shi)是(shi)(shi)(shi)：(a) 稀相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)和(he)（b）密相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)每種流(liu)(liu)動(dong)型式(shi)(shi)(shi)可按物(wu)(wu)料(liao)與空氣(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)流(liu)(liu)量比(bi)率大(da)小(xiao)分(fen)類，其比(bi)率也被(bei)(bei)稱為(wei)(wei)“固氣(qi)(qi)比(bi)”： μ=ms/mf (1)許(xu)多稀相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)(de)(de)(de)運(yun)行范圍為(wei)(wei)0＜μ＜15，而密相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)通常是(shi)(shi)(shi)μ＞15。圖1所(suo)示(shi)的(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)典型輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)狀(zhuang)態圖。稀相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)可以(yi)(yi)被(bei)(bei)認為(wei)(wei)是(shi)(shi)(shi)一種完全(quan)的(de)(de)(de)(de)(de)(de)(de)(de)懸(xuan)浮(fu)流(liu)(liu)，而密相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)通常被(bei)(bei)認為(wei)(wei)是(shi)(shi)(shi)非懸(xuan)浮(fu)流(liu)(liu)。然而，如圖1所(suo)示(shi)，許(xu)多不(bu)同種類的(de)(de)(de)(de)(de)(de)(de)(de)密相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)（非懸(xuan)浮(fu)流(liu)(liu)）依靠散料(liao)的(de)(de)(de)(de)(de)(de)(de)(de)料(liao)性和(he)流(liu)(liu)動(dong)性存在(zai)。密相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)同樣也能被(bei)(bei)定義為(wei)(wei)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)物(wu)(wu)料(liao)完全(quan)填(tian)滿(man)管(guan)(guan)道(dao)(dao)截面的(de)(de)(de)(de)(de)(de)(de)(de)一種輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)方(fang)式(shi)(shi)(shi)。稀相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)通常需(xu)要使用(yong)大(da)量的(de)(de)(de)(de)(de)(de)(de)(de)高速(su)氣(qi)(qi)體。氣(qi)(qi)流(liu)(liu)依靠升力(li)(li)和(he)推動(dong)力(li)(li)以(yi)(yi)離散粒(li)子的(de)(de)(de)(de)(de)(de)(de)(de)形式(shi)(shi)(shi)攜帶著物(wu)(wu)料(liao)。參考圖1中(zhong)所(suo)述的(de)(de)(de)(de)(de)(de)(de)(de)“懸(xuan)浮(fu)流(liu)(liu)”，稀相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)系統通常是(shi)(shi)(shi)最為(wei)(wei)被(bei)(bei)廣泛應(ying)用(yong)的(de)(de)(de)(de)(de)(de)(de)(de)氣(qi)(qi)力(li)(li)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)系統。由于稀相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)系統設計的(de)(de)(de)(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)對(dui)簡單性，它們同時(shi)(shi)(shi)也被(bei)(bei)頻繁的(de)(de)(de)(de)(de)(de)(de)(de)應(ying)用(yong)在(zai)工業領域。輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)氣(qi)(qi)體的(de)(de)(de)(de)(de)(de)(de)(de)速(su)度(du)(du)減(jian)少(shao)到比(bi)保持粒(li)子懸(xuan)浮(fu)狀(zhuang)態的(de)(de)(de)(de)(de)(de)(de)(de)臨(lin)界值(zhi)更小(xiao)時(shi)(shi)(shi)，導致物(wu)(wu)料(liao)在(zai)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)(de)(de)橫截面形成不(bu)均勻的(de)(de)(de)(de)(de)(de)(de)(de)分(fen)布。臨(lin)界氣(qi)(qi)體速(su)度(du)(du)被(bei)(bei)稱為(wei)(wei)是(shi)(shi)(shi)水(shui)(shui)平輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)(de)(de)跳躍速(su)度(du)(du)，垂直輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)時(shi)(shi)(shi)堵塞。當水(shui)(shui)平管(guan)(guan)道(dao)(dao)中(zhong)的(de)(de)(de)(de)(de)(de)(de)(de)物(wu)(wu)料(liao)表面氣(qi)(qi)體速(su)度(du)(du)低(di)于突變速(su)度(du)(du)時(shi)(shi)(shi)，輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)將(jiang)會以(yi)(yi)低(di)流(liu)(liu)量通過管(guan)(guan)道(dao)(dao)橫截面的(de)(de)(de)(de)(de)(de)(de)(de)上部，在(zai)管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)(de)(de)剩(sheng)余(yu)部分(fen)以(yi)(yi)高濃度(du)(du)低(di)速(su)度(du)(du)的(de)(de)(de)(de)(de)(de)(de)(de)形式(shi)(shi)(shi)填(tian)充(chong)。有時(shi)(shi)(shi)沿(yan)管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)(de)(de)橫截面會被(bei)(bei)填(tian)滿(man)，而有時(shi)(shi)(shi)只是(shi)(shi)(shi)部分(fen)被(bei)(bei)填(tian)滿(man).

實際(ji)應用(yong)中, 按照氣力(li)(li)驅動形式可以(yi)分(fen)(fen)(fen)為(wei)負壓(ya)和(he)正壓(ya)氣力(li)(li)輸(shu)(shu)(shu)送(song)(song), 在(zai)這兩種輸(shu)(shu)(shu)送(song)(song)系統中, 根據流(liu)動狀態圖再區分(fen)(fen)(fen)分(fen)(fen)(fen)為(wei)稀相(xiang), 密(mi)(mi)相(xiang)和(he)流(liu)化態輸(shu)(shu)(shu)送(song)(song)系統. 除(chu)此之外(wai),根據喂料不同分(fen)(fen)(fen)為(wei)連續和(he)批次(ci)輸(shu)(shu)(shu)送(song)(song). 在(zai)高壓(ya)密(mi)(mi)相(xiang)輸(shu)(shu)(shu)送(song)(song)技術中常采(cai)用(yong)批次(ci)的壓(ya)力(li)(li)罐進行高壓(ya)輸(shu)(shu)(shu)送(song)(song), 同時, 可以(yi)組合兩個壓(ya)力(li)(li)罐設(she)計達(da)到連續的輸(shu)(shu)(shu)送(song)(song).

密相氣力輸(shu)送(song)特點:

● 用氣(qi)量小(xiao), 節(jie)能

● 無殘留輸送

● 不(bu)堵塞, 運行可(ke)靠

● 維護費用低

● 適合于各類(lei)粉粒(li)物(wu)料

● 壓力至0. 6m p a可(ke)調

● 適合(he)于柔性化(hua)自動生產中的物(wu)料高效輸送