芒果视频下载

電磁閥行業簡介

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(he)不同的(de)電路來實現(xian)預(yu)期的(de)控(kong)制(zhi)，而(er)控(kong)制(zhi)的(de)精度和靈(ling)活性都能夠保證。

二、電磁閥工作原理

電(dian)磁(ci)閥里有密閉的(de)腔，在不(bu)同位置開(kai)(kai)有通(tong)孔(kong)，每(mei)個(ge)孔(kong)連接不(bu)同的(de)油(you)(you)管(guan)，腔中間是(shi)(shi)活塞，兩面是(shi)(shi)兩塊電(dian)磁(ci)鐵(tie)，哪(na)面的(de)磁(ci)鐵(tie)線圈通(tong)電(dian)閥體(ti)就(jiu)會被吸(xi)引到哪(na)邊，通(tong)過控制(zhi)閥體(ti)的(de)移動來開(kai)(kai)啟(qi)或關(guan)閉不(bu)同的(de)排油(you)(you)孔(kong)，而進油(you)(you)孔(kong)是(shi)(shi)常開(kai)(kai)的(de)，液(ye)壓(ya)油(you)(you)就(jiu)會進入不(bu)同的(de)排油(you)(you)管(guan)，然后通(tong)過油(you)(you)的(de)壓(ya)力(li)來推動油(you)(you)缸的(de)活塞，活塞又帶(dai)動活塞桿，活塞桿帶(dai)動機(ji)械(xie)裝(zhuang)置。這樣(yang)通(tong)過控制(zhi)電(dian)磁(ci)鐵(tie)的(de)電(dian)流通(tong)斷就(jiu)控制(zhi)了機(ji)械(xie)運(yun)動。

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：通(tong)電(dian)時(shi)，電(dian)磁線圈產(chan)生電(dian)磁力(li)(li)把關(guan)閉(bi)件從閥座上提起，閥門(men)打開；斷電(dian)時(shi)，電(dian)磁力(li)(li)消失(shi)，彈簧把關(guan)閉(bi)件壓在閥座上，閥門(men)關(guan)閉(bi)。

特(te)點：在真空、負壓(ya)、零壓(ya)時(shi)能正常(chang)工(gong)作，但通徑一般不超過25mm。

（2）分步直動式電磁閥

原理(li)：它是一種直(zhi)動(dong)和先導(dao)(dao)式相結(jie)合的原理(li)，當(dang)入口與出(chu)口沒(mei)有壓(ya)(ya)差時，通(tong)電(dian)后，電(dian)磁(ci)力(li)直(zhi)接把先導(dao)(dao)小閥(fa)(fa)和主(zhu)閥(fa)(fa)關(guan)閉(bi)(bi)件依次向(xiang)上提起，閥(fa)(fa)門打開。當(dang)入口與出(chu)口達到啟動(dong)壓(ya)(ya)差時，通(tong)電(dian)后，電(dian)磁(ci)力(li)先導(dao)(dao)小閥(fa)(fa)，主(zhu)閥(fa)(fa)下腔壓(ya)(ya)力(li)上升，上腔壓(ya)(ya)力(li)下降，從而利用(yong)壓(ya)(ya)差把主(zhu)閥(fa)(fa)向(xiang)上推開；斷電(dian)時，先導(dao)(dao)閥(fa)(fa)利用(yong)彈簧力(li)或(huo)介質壓(ya)(ya)力(li)推動(dong)關(guan)閉(bi)(bi)件，向(xiang)下移動(dong)，使閥(fa)(fa)門關(guan)閉(bi)(bi)。

特(te)點：在零壓(ya)差或(huo)真(zhen)空(kong)、高壓(ya)時亦能可動(dong)作，但功率較大，要求必(bi)須水平安裝。

（3）先導式電磁閥

原(yuan)理：通(tong)(tong)電(dian)(dian)時，電(dian)(dian)磁力把(ba)先導孔(kong)打開，上腔室壓力迅(xun)速下降，在關(guan)(guan) 閉件(jian)周(zhou)圍形(xing)成(cheng)上低下高的壓差(cha)，流(liu)體(ti)壓力推動(dong)關(guan)(guan)閉件(jian)向上移(yi)動(dong)，閥門(men)打開；斷電(dian)(dian)時，彈簧力把(ba)先導孔(kong)關(guan)(guan)閉，入口(kou)壓力通(tong)(tong)過旁通(tong)(tong)孔(kong)迅(xun)速腔室在關(guan)(guan)閥件(jian)周(zhou)圍形(xing)成(cheng)下低上高的壓差(cha)，流(liu)體(ti)壓力推動(dong)關(guan)(guan)閉件(jian)向下移(yi)動(dong)，關(guan)(guan)閉閥門(men)。

特(te)點：流體壓力范圍上(shang)限較高，可任意安裝（需定制）但(dan)必須滿足(zu)流體壓差條件(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(dong)膜片結(jie)(jie)構(gou)(gou)、分步直(zhi)動(dong)膜片結(jie)(jie)構(gou)(gou)、先導膜片結(jie)(jie)構(gou)(gou)、直(zhi)動(dong)活(huo)塞(sai)(sai)(sai)結(jie)(jie)構(gou)(gou)、分步直(zhi)動(dong)活(huo)塞(sai)(sai)(sai)結(jie)(jie)構(gou)(gou)、先導活(huo)塞(sai)(sai)(sai)結(jie)(jie)構(gou)(gou)。

3、電磁閥按照功能分類：水用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、蒸(zheng)汽電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、制冷(leng)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、低溫電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、燃氣(qi)(qi)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、消防(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、氨用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、氣(qi)(qi)體電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、液體電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、微型(xing)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、脈沖(chong)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、液壓電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、常開(kai)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、油(you)用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、直流電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、高壓電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥、防(fang)(fang)爆電(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)閥等(deng)。