工作原理

電(dian)(dian)(dian)磁閥里有密(mi)閉的(de)(de)腔(qiang)，在不同位(wei)置(zhi)開有通孔(kong)，每個孔(kong)連接不同的(de)(de)油(you)管，腔(qiang)中間是活(huo)塞(sai)，兩(liang)面是兩(liang)塊電(dian)(dian)(dian)磁鐵(tie)，哪(na)面的(de)(de)磁鐵(tie)線圈通電(dian)(dian)(dian)閥體(ti)就會被吸(xi)引到哪(na)邊，通過控(kong)制閥體(ti)的(de)(de)移動(dong)(dong)(dong)來(lai)開啟或關閉不同的(de)(de)排油(you)孔(kong)，而(er)進油(you)孔(kong)是常開的(de)(de)，液(ye)壓油(you)就會進入(ru)不同的(de)(de)排油(you)管，然后(hou)通過油(you)的(de)(de)壓力來(lai)推動(dong)(dong)(dong)油(you)缸(gang)的(de)(de)活(huo)塞(sai)，活(huo)塞(sai)又(you)帶動(dong)(dong)(dong)活(huo)塞(sai)桿，活(huo)塞(sai)桿帶動(dong)(dong)(dong)機(ji)械裝置(zhi)。這樣(yang)通過控(kong)制電(dian)(dian)(dian)磁鐵(tie)的(de)(de)電(dian)(dian)(dian)流通斷就控(kong)制了機(ji)械運動(dong)(dong)(dong)。 

主要分類

1、電磁閥從原理上分為三大類：

直動式電磁閥

原理(li)：通電(dian)時(shi)，電(dian)磁(ci)線圈(quan)產生電(dian)磁(ci)力把關(guan)閉件從(cong)閥座(zuo)上提起，閥門打開；斷電(dian)時(shi)，電(dian)磁(ci)力消失(shi)，彈簧(huang)把關(guan)閉件壓在閥座(zuo)上，閥門關(guan)閉。

特點：在真(zhen)空、負壓、零壓時能正(zheng)常工作，但通(tong)徑一般不(bu)超(chao)過25mm。

分步直動式電磁閥

原理：它是一(yi)種直動(dong)(dong)和先導(dao)式相結合的(de)原理，當(dang)入(ru)口(kou)與(yu)出口(kou)沒有壓(ya)(ya)差時(shi)，通電(dian)后，電(dian)磁力(li)直接把先導(dao)小閥(fa)(fa)和主閥(fa)(fa)關(guan)閉(bi)件依次向(xiang)上(shang)提起(qi)，閥(fa)(fa)門打開。當(dang)入(ru)口(kou)與(yu)出口(kou)達到啟動(dong)(dong)壓(ya)(ya)差時(shi)，通電(dian)后，電(dian)磁力(li)先導(dao)小閥(fa)(fa)，主閥(fa)(fa)下腔壓(ya)(ya)力(li)上(shang)升，上(shang)腔壓(ya)(ya)力(li)下降，從而利(li)用壓(ya)(ya)差把主閥(fa)(fa)向(xiang)上(shang)推開；斷電(dian)時(shi)，先導(dao)閥(fa)(fa)利(li)用彈簧力(li)或介質壓(ya)(ya)力(li)推動(dong)(dong)關(guan)閉(bi)件，向(xiang)下移動(dong)(dong)，使閥(fa)(fa)門關(guan)閉(bi)。

特(te)點：在零壓差或(huo)真空(kong)、高壓時亦能可*動作，但功率較大(da)，要求(qiu)必須(xu)水平安裝。

先導式電磁閥

原(yuan)理：通(tong)電(dian)時(shi)，電(dian)磁力把先導(dao)孔打開(kai)(kai)，上(shang)(shang)腔室壓力迅速下降，在(zai)(zai)關(guan) 閉(bi)件周圍形成(cheng)上(shang)(shang)低下高的壓差，流體(ti)壓力推(tui)動關(guan)閉(bi)件向上(shang)(shang)移(yi)動，閥門打開(kai)(kai)；斷電(dian)時(shi)，彈簧力把先導(dao)孔關(guan)閉(bi)，入口壓力通(tong)過旁(pang)通(tong)孔迅速腔室在(zai)(zai)關(guan)閥件周圍形成(cheng)下低上(shang)(shang)高的壓差，流體(ti)壓力推(tui)動關(guan)閉(bi)件向下移(yi)動，關(guan)閉(bi)閥門。

特點(dian)：流(liu)體壓力范圍上(shang)限較高(gao)，可任意安裝（需定制(zhi)）但必(bi)須滿(man)足流(liu)體壓差條(tiao)件(jian)。

2、電磁閥(fa)從(cong)閥(fa)結(jie)構(gou)和(he)材料上(shang)的不同與原理上(shang)的區別，分(fen)(fen)為(wei)六(liu)個(ge)分(fen)(fen)支小類：直(zhi)動(dong)膜片(pian)結(jie)構(gou)、分(fen)(fen)步直(zhi)動(dong)膜片(pian)結(jie)構(gou)、先導膜片(pian)結(jie)構(gou)、直(zhi)動(dong)活塞(sai)結(jie)構(gou)、分(fen)(fen)步直(zhi)動(dong)活塞(sai)結(jie)構(gou)、先導活塞(sai)結(jie)構(gou)。

3、電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)按照功能分類：水用(yong)(yong)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、蒸(zheng)汽電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、制(zhi)冷電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、低溫電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、燃(ran)氣電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、消防電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、氨用(yong)(yong)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、氣體電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、液體電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、微型(xing)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、脈沖電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、液壓(ya)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa) 常(chang)開電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、油用(yong)(yong)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、直(zhi)流(liu)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、高壓(ya)電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)、防爆電(dian)(dian)(dian)(dian)磁(ci)(ci)(ci)(ci)(ci)(ci)(ci)閥(fa)(fa)(fa)等。

有區別，根據電動閥(fa)和(he)電磁閥(fa)的工作原(yuan)理、類型和(he)應用范圍等(deng)方面，整理出以下內容，供您參考：

工作原理

1、電磁(ci)(ci)閥：電磁(ci)(ci)閥是由(you)電磁(ci)(ci)線圈(quan)（電磁(ci)(ci)鐵）和閥芯(xin)及閥體組成，當電磁(ci)(ci)線圈(quan)通(tong)電或斷(duan)電時，帶(dai)動閥芯(xin)動作(zuo)，使流體通(tong)過閥體或被切斷(duan)；

向左轉|向右轉

2、電動(dong)閥(fa)(fa)門：電動(dong)閥(fa)(fa)門是通過(guo)電機驅動(dong)閥(fa)(fa)桿(gan)，帶動(dong)閥(fa)(fa)芯動(dong)作，來實(shi)現(xian)流體的通過(guo)或切斷；