YAMAHA電磁(ci)(ci)閥(fa)是用電磁(ci)(ci)控(kong)制(zhi)的工業設(she)備(bei)，是用來控(kong)制(zhi)流體(ti)的自動化(hua)基礎元件(jian)，屬(shu)于執行器，不限于液(ye)壓(ya)、氣動。

一、電磁閥(fa)從原理上分為：

1.直動式電磁閥

原理(li)：通(tong)電(dian)(dian)時(shi)，電(dian)(dian)磁線圈產生(sheng)電(dian)(dian)磁力(li)把關閉件(jian)從閥座(zuo)上提(ti)起(qi)，閥門打開；斷電(dian)(dian)時(shi)，電(dian)(dian)磁力(li)消失(shi)，彈簧把關閉件(jian)壓在閥座(zuo)上，閥門關閉。

特(te)點：在真空、負壓、零壓時能(neng)正常(chang)工作，但通徑一般不超(chao)過(guo)25mm。

2.分步直動式電磁閥

原理：它是一(yi)種直動和先(xian)導式(shi)相(xiang)結合(he)的原理，當(dang)入(ru)口與出(chu)口沒(mei)有壓(ya)(ya)(ya)差(cha)時，通電(dian)(dian)后，電(dian)(dian)磁力(li)(li)直接把先(xian)導小閥(fa)和主閥(fa)關(guan)閉件(jian)依次向(xiang)(xiang)上提起(qi)，閥(fa)門(men)打開。當(dang)入(ru)口與出(chu)口達到啟動壓(ya)(ya)(ya)差(cha)時，通電(dian)(dian)后，電(dian)(dian)磁力(li)(li)先(xian)導小閥(fa)，主閥(fa)下(xia)(xia)腔壓(ya)(ya)(ya)力(li)(li)上升，上腔壓(ya)(ya)(ya)力(li)(li)下(xia)(xia)降(jiang)，從而(er)利(li)(li)用(yong)壓(ya)(ya)(ya)差(cha)把主閥(fa)向(xiang)(xiang)上推(tui)開；斷電(dian)(dian)時，先(xian)導閥(fa)利(li)(li)用(yong)彈(dan)簧力(li)(li)或介質壓(ya)(ya)(ya)力(li)(li)推(tui)動關(guan)閉件(jian)，向(xiang)(xiang)下(xia)(xia)移動，使閥(fa)門(men)關(guan)閉。

特(te)點：在零(ling)壓差(cha)或真(zhen)空、高壓時亦可(ke)動(dong)作，但功率較大，需水平安裝。

3.先導式電磁閥

原理：通(tong)電時，電磁力把(ba)(ba)先導孔(kong)打開(kai)，上(shang)腔(qiang)室壓力迅速下(xia)降，在(zai)關閉(bi)件周圍形成(cheng)上(shang)低下(xia)高的壓差，流(liu)體(ti)壓力推(tui)動(dong)關閉(bi)件向上(shang)移動(dong)，閥(fa)門打開(kai)；斷(duan)電時，彈簧力把(ba)(ba)先導孔(kong)關閉(bi)，入(ru)口壓力通(tong)過(guo)旁通(tong)孔(kong)迅速腔(qiang)室在(zai)關閥(fa)件周圍形成(cheng)下(xia)低上(shang)高的壓差，流(liu)體(ti)壓力推(tui)動(dong)關閉(bi)件向下(xia)移動(dong)，關閉(bi)閥(fa)門。

特點：流體(ti)壓力范圍上限較高，可任意(yi)安裝（需定制(zhi)）但需滿足(zu)流體(ti)壓差條(tiao)件(jian)。

二(er)、電磁閥從(cong)閥結(jie)構(gou)(gou)和材料上的不同(tong)與原理上的區(qu)別，分(fen)為六個分(fen)支小類：直(zhi)動(dong)膜(mo)片(pian)結(jie)構(gou)(gou)、分(fen)步直(zhi)動(dong)膜(mo)片(pian)結(jie)構(gou)(gou)、先導(dao)膜(mo)片(pian)結(jie)構(gou)(gou)、直(zhi)動(dong)活塞(sai)結(jie)構(gou)(gou)、分(fen)步直(zhi)動(dong)活塞(sai)結(jie)構(gou)(gou)、先導(dao)活塞(sai)結(jie)構(gou)(gou)。

三(san)、電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)按照功能(neng)分類：水用(yong)電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、蒸汽電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、制冷電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、低溫電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、燃(ran)氣(qi)電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、消防電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、氨用(yong)電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、氣(qi)體(ti)電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、液(ye)體(ti)電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、微型電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、脈沖電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、液(ye)壓(ya)電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa) 常開電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、油用(yong)電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、直(zhi)流電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、高壓(ya)電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)、防爆電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)(fa)(fa)(fa)(fa)等。

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