上海供應(yīng)德國力士樂Rexroth電磁閥

REXROTH電磁閥的結(jié)構(gòu)和工作原理
 一：力士樂直動(dòng)式電磁閥
 有常閉型和常開型二種。常閉型斷電時(shí)呈關(guān)閉狀態(tài)，當(dāng)線圈通電時(shí)產(chǎn)生電磁力，使動(dòng)鐵芯克服彈簧力同靜鐵芯吸合直接開啟閥，介質(zhì)呈通路；當(dāng)線圈斷電時(shí)電磁力消失，動(dòng)鐵芯在彈簧力的作用下復(fù)位，直接關(guān)閉閥口，介質(zhì)不通。結(jié)構(gòu)簡單，動(dòng)作可靠，在零壓差和微真空下正常工作。常開型正好相反。如小于φ6流量通徑的電磁閥。
力士樂電磁閥原理：常閉型直動(dòng)式電磁閥通電時(shí)，電磁線圈產(chǎn)生電磁吸力把閥芯提起，使關(guān)閉件離遠(yuǎn)開閥座密封副打開；斷電時(shí)，電磁力消失，靠彈簧力把關(guān)閉元件壓在閥座上閥門關(guān)閉。（常開型與此相反）
 特點(diǎn)：在真空、負(fù)壓、零壓時(shí)能正常工作，但一般通徑不超過25mm。DN50以下可任意安裝，但電磁頭體積較大。

二、力士樂分步直動(dòng)式電磁閥
 該閥采用一次開閥和二次開閥連在一體，主閥和導(dǎo)閥分步使電磁力和壓差直接開啟主閥口。當(dāng)線圈通電時(shí)，產(chǎn)生電磁力使動(dòng)鐵芯和靜鐵芯吸合，導(dǎo)閥口開啟而導(dǎo)閥口設(shè)在主閥口上，且動(dòng)鐵芯與主閥芯連在一起，此時(shí)主閥上腔的壓力通過導(dǎo)閥口卸荷，在壓力差和電磁力的同時(shí)作用下使主閥芯向上運(yùn)動(dòng)，開啟主閥介質(zhì)流通。當(dāng)線圈斷電時(shí)電磁力消失，此時(shí)動(dòng)鐵芯在自重和彈簧力的作用下關(guān)閉導(dǎo)閥孔，此時(shí)介質(zhì)在平衡孔中進(jìn)入主閥芯上腔，使上腔壓力升高，此時(shí)在彈簧復(fù)位和壓力的作用下關(guān)閉主閥，介質(zhì)斷流。結(jié)構(gòu)合理，動(dòng)作可靠，在零壓差時(shí)工作也可靠。如：ZQDF，ZS，2W等。

力士樂電磁閥原理：它是一種直動(dòng)和先導(dǎo)式相結(jié)合的原理，當(dāng)入口與出口壓差≤0.05Mpa，通電時(shí)，電磁力直接把先導(dǎo)小閥和主閥關(guān)閉件依次向上提起，閥門打開。當(dāng)入口與出口壓差>0.05Mpa，通電時(shí)，電磁力先打開先導(dǎo)小閥，主閥下腔壓力上升，上腔壓力下降，從而利用壓差把主閥向上推開；斷電時(shí)，先導(dǎo)閥和主閥利用彈簧力或介質(zhì)壓力推動(dòng)關(guān)閉件，向下移動(dòng)，使閥門關(guān)閉。
 特點(diǎn)：在零壓差或真空、高壓時(shí)亦能可靠工作，但功率較大，要求豎直安裝。

 三、力士樂間接先導(dǎo)式電磁閥
 該系列電磁閥由先導(dǎo)閥和主閥芯著形成通道組合而成；常閉型在未通電時(shí)，呈關(guān)閉狀態(tài)。當(dāng)線圈通電時(shí)，產(chǎn)生的磁力使動(dòng)鐵芯和靜鐵芯吸合，導(dǎo)閥口打開，介質(zhì)流向出口，此時(shí)主閥芯上腔壓力減少，低于進(jìn)口側(cè)的壓力，形成壓差克服彈簧阻力而隨之向上運(yùn)動(dòng)，達(dá)到開啟主閥口的目的，介質(zhì)流通。當(dāng)線圈斷電時(shí)，磁力消失，動(dòng)鐵芯在彈簧力作用下復(fù)位關(guān)閉先導(dǎo)口，此時(shí)介質(zhì)從平衡孔流入，主閥芯上腔壓力增大，并在彈簧力的作用下向下運(yùn)動(dòng)，關(guān)閉主閥口。常開式原理正好相反。如：SLA，DF（φ15以上口徑），ZCZ等。
力士樂電磁閥原理：通電時(shí)，電磁力驅(qū)動(dòng)先導(dǎo)閥打開先導(dǎo)閥，主閥上腔壓力迅速下降，在主閥上下腔內(nèi)形成壓差，依靠介質(zhì)壓力推動(dòng)主閥關(guān)閉件上移，閥門開啟；斷電時(shí)，彈簧力把先導(dǎo)閥關(guān)閉，入口介質(zhì)壓力通過先導(dǎo)孔迅速進(jìn)入主閥上腔在上腔內(nèi)形成壓差，從而使主閥關(guān)閉。

上海供應(yīng)德國力士樂Rexroth電磁閥

力士樂Rexroth電磁閥從原理上分為三大類 （ 即：直動(dòng)式、分步童先導(dǎo)式 ） 而從閥瓣結(jié)構(gòu)和材料上的不同與原理上的差別又分為六個(gè)分支小類 （ 直動(dòng)膜片結(jié)構(gòu)、分步重片結(jié)構(gòu)、先導(dǎo)膜式結(jié)構(gòu)、直動(dòng)活塞結(jié)構(gòu)、分步直動(dòng)活塞結(jié)構(gòu)、先導(dǎo)活塞結(jié)構(gòu) ）
　　力士樂直動(dòng)式燃?xì)怆姶砰y：電磁線圈發(fā)生電磁力把封閉件從閥座上提起，燃?xì)怆姶砰y工作原理：通電時(shí)。閥門打開;斷電時(shí)，電磁力消散，彈簧把封閉件壓在閥座上，閥門封閉。但通徑一般不超過 25mm 力士樂Rexroth電磁閥電磁閥特點(diǎn)：真空、負(fù)壓、零壓時(shí)能正常工作。
　　力士樂散布直動(dòng)式燃?xì)怆姶砰y：當(dāng)進(jìn)口與入口沒有壓差時(shí)，燃?xì)怆姶砰y工作原理：一種直動(dòng)和先導(dǎo)式相聯(lián)合的原理。通電后，電磁力直接把先導(dǎo)小閥和主閥封閉件依次向上提起，閥門打開。當(dāng)進(jìn)口與出口達(dá)到啟動(dòng)壓差時(shí)，通電后，電磁力先導(dǎo)小閥，主閥下腔壓力上升，上腔壓力降落，從而利用壓差把主閥向上推開;斷電時(shí)，先導(dǎo)閥利用彈簧力或介質(zhì)壓力推動(dòng)封閉件，向下移動(dòng)，使閥門封閉。但功率較大，力士樂Rexroth電磁閥電磁閥特點(diǎn)：零壓差或真空、高壓時(shí)亦能可 * 動(dòng)作。請求必需水平裝置。
　　力士樂先導(dǎo)式燃?xì)怆姶砰y：燃?xì)怆姶砰y把先導(dǎo)孔打開，燃?xì)怆姶砰y工作原理：通電時(shí)。上腔室壓力敏捷降落，封閉件四周形成上低下高的壓差，流體壓力推動(dòng)封閉件向上移動(dòng)，閥門打開;斷電時(shí)，彈簧力把先導(dǎo)孔封閉，進(jìn)口壓力通過旁通孔敏捷腔室在關(guān)閥件四周形成下低上高的壓差，流體壓力推動(dòng)封閉件向下移動(dòng)，封閉閥門?？扇我獍惭b （ 需定制 ） 但必需滿足流體壓差條件。 力士樂Rexroth電磁閥電磁閥特點(diǎn)：流體壓力范疇上限較高。

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：唐玙昺

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