芒果视频下载

一、什么是電磁閥

電磁閥是用電磁控制的工業設備，是用來控制流體的自動化基礎元件，屬于執行器，并不限于液壓、氣動。用在工業控制系統中調整介質的方向、流量、速度和其他的參數。品牌電磁閥可以配(pei)合不同的電路來實現(xian)預期的控(kong)制，而控(kong)制的精(jing)度和靈活(huo)性都能夠保證。

二、電磁閥工作原理

電(dian)磁閥里(li)有(you)密閉的(de)(de)腔，在不(bu)同位置開(kai)有(you)通(tong)(tong)孔，每個孔連接不(bu)同的(de)(de)油管，腔中間(jian)是活(huo)(huo)(huo)塞(sai)(sai)(sai)，兩面是兩塊(kuai)電(dian)磁鐵，哪面的(de)(de)磁鐵線圈(quan)通(tong)(tong)電(dian)閥體就會被吸(xi)引到(dao)哪邊(bian)，通(tong)(tong)過控(kong)(kong)制(zhi)閥體的(de)(de)移動(dong)(dong)來開(kai)啟或關閉不(bu)同的(de)(de)排(pai)油孔，而進油孔是常開(kai)的(de)(de)，液壓油就會進入不(bu)同的(de)(de)排(pai)油管，然后通(tong)(tong)過油的(de)(de)壓力來推動(dong)(dong)油缸的(de)(de)活(huo)(huo)(huo)塞(sai)(sai)(sai)，活(huo)(huo)(huo)塞(sai)(sai)(sai)又(you)帶動(dong)(dong)活(huo)(huo)(huo)塞(sai)(sai)(sai)桿，活(huo)(huo)(huo)塞(sai)(sai)(sai)桿帶動(dong)(dong)機械裝置。這樣通(tong)(tong)過控(kong)(kong)制(zhi)電(dian)磁鐵的(de)(de)電(dian)流通(tong)(tong)斷就控(kong)(kong)制(zhi)了(le)機械運動(dong)(dong)。

三、電磁閥有幾種類型

1、電磁閥從原理上分為三大類：

（1）直動式電磁閥

原理(li)：通(tong)電時，電磁(ci)線(xian)圈(quan)產生電磁(ci)力(li)把關(guan)(guan)閉(bi)(bi)件(jian)(jian)從(cong)閥(fa)座上(shang)提起，閥(fa)門打開；斷(duan)電時，電磁(ci)力(li)消失(shi)，彈簧把關(guan)(guan)閉(bi)(bi)件(jian)(jian)壓在(zai)閥(fa)座上(shang)，閥(fa)門關(guan)(guan)閉(bi)(bi)。

特點(dian)：在真空、負壓、零(ling)壓時能正(zheng)常工(gong)作，但通徑一般不超過25mm。

（2）分步直動式電磁閥

原理：它是一種直動和先導(dao)(dao)(dao)式(shi)相結合的原理，當(dang)入口與出(chu)口沒(mei)有壓(ya)(ya)差(cha)時，通(tong)電(dian)(dian)(dian)后(hou)，電(dian)(dian)(dian)磁(ci)力(li)(li)直接把先導(dao)(dao)(dao)小(xiao)閥(fa)(fa)(fa)和主(zhu)(zhu)閥(fa)(fa)(fa)關閉件依次向(xiang)上(shang)(shang)提起，閥(fa)(fa)(fa)門打開。當(dang)入口與出(chu)口達到啟動壓(ya)(ya)差(cha)時，通(tong)電(dian)(dian)(dian)后(hou)，電(dian)(dian)(dian)磁(ci)力(li)(li)先導(dao)(dao)(dao)小(xiao)閥(fa)(fa)(fa)，主(zhu)(zhu)閥(fa)(fa)(fa)下腔壓(ya)(ya)力(li)(li)上(shang)(shang)升(sheng)，上(shang)(shang)腔壓(ya)(ya)力(li)(li)下降，從(cong)而(er)利(li)用壓(ya)(ya)差(cha)把主(zhu)(zhu)閥(fa)(fa)(fa)向(xiang)上(shang)(shang)推(tui)開；斷(duan)電(dian)(dian)(dian)時，先導(dao)(dao)(dao)閥(fa)(fa)(fa)利(li)用彈簧力(li)(li)或介質壓(ya)(ya)力(li)(li)推(tui)動關閉件，向(xiang)下移動，使閥(fa)(fa)(fa)門關閉。

特(te)點：在零(ling)壓(ya)差或真(zhen)空、高壓(ya)時(shi)亦能可(ke)動作，但功率較大，要求必(bi)須(xu)水平安裝。

（3）先導式電磁閥

原理：通(tong)電(dian)時，電(dian)磁力(li)把先導孔(kong)(kong)打開，上(shang)腔(qiang)室壓(ya)(ya)(ya)力(li)迅(xun)(xun)速(su)下(xia)降，在關(guan)(guan) 閉(bi)件(jian)周(zhou)圍形成(cheng)上(shang)低(di)下(xia)高(gao)的壓(ya)(ya)(ya)差，流體壓(ya)(ya)(ya)力(li)推(tui)動(dong)關(guan)(guan)閉(bi)件(jian)向(xiang)上(shang)移動(dong)，閥門(men)打開；斷電(dian)時，彈簧力(li)把先導孔(kong)(kong)關(guan)(guan)閉(bi)，入口壓(ya)(ya)(ya)力(li)通(tong)過旁通(tong)孔(kong)(kong)迅(xun)(xun)速(su)腔(qiang)室在關(guan)(guan)閥件(jian)周(zhou)圍形成(cheng)下(xia)低(di)上(shang)高(gao)的壓(ya)(ya)(ya)差，流體壓(ya)(ya)(ya)力(li)推(tui)動(dong)關(guan)(guan)閉(bi)件(jian)向(xiang)下(xia)移動(dong)，關(guan)(guan)閉(bi)閥門(men)。

特點(dian)：流體(ti)壓力范圍上限較高，可任(ren)意(yi)安裝（需定制）但必(bi)須滿足流體(ti)壓差條件(jian)。

2、電磁閥從閥結構和材料上的不同與原理上的區別，分為六個分支小類：直(zhi)動膜(mo)(mo)片(pian)結構(gou)、分步直(zhi)動膜(mo)(mo)片(pian)結構(gou)、先導膜(mo)(mo)片(pian)結構(gou)、直(zhi)動活塞結構(gou)、分步直(zhi)動活塞結構(gou)、先導活塞結構(gou)。

3、電磁閥按照功能分類：水用電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、蒸汽(qi)電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、制冷電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、低溫電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、燃(ran)氣電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、消防電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、氨用電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、氣體電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、液體電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、微(wei)型電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、脈(mo)沖(chong)電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、液壓(ya)電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、常開電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、油(you)用電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、直流電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、高壓(ya)電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)、防爆電(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)等。