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4WE6D62/EG220N9K4/V   REXROTH 力士樂(lè)原裝進(jìn)口現(xiàn)貨

4WE6D62/EG220N9K4/V   REXROTH 力士樂(lè)原裝進(jìn)口現(xiàn)貨

泉州市天益機(jī)電貿(mào)易有限公司 www.qztyjd.com

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電磁閥從原理上分為三大類（即：直動(dòng)式、分步直動(dòng)式、先導(dǎo)式），而從閥瓣結(jié)構(gòu)和材料上的不同與原理上的區(qū)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)）。

直動(dòng)式電磁閥：

原理：通電時(shí)，電磁線圈產(chǎn)生電磁力把關(guān)閉件從閥座上提起，閥門打開；斷電時(shí)，電磁力消失，彈簧把關(guān)閉件壓在閥座上，閥門關(guān)閉。

特點(diǎn)：在真空、負(fù)壓、零壓時(shí)能正常工作，但通徑一般不超過(guò)25mm。

分布直動(dòng)式電磁閥：

原理：它是一種直動(dòng)和先導(dǎo)式相結(jié)合的原理，當(dāng)入口與出口沒有壓差時(shí)，通電后，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，上腔壓力下降，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)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*動(dòng)作，但功率較大，要求必須水平安裝。