Rexroth力士樂電磁閥/德國力士樂電磁閥上海辦事處,Rexroth力士樂是的傳動與控制專家。憑借在傳動、控制及運動領(lǐng)域內(nèi)的豐富經(jīng)驗，公司以力士樂為品牌，為80多個國家，50多萬家客戶提供量身定制的解決方案，是世界工業(yè)設(shè)備及工廠自動化、行走機械運用與可再生能源市場的合作伙伴。作為博世集團的全資子公司，2009年銷售額近41億歐元，擁有超過34200多名專業(yè)員工，其中包括中國員工2736名。自1978年開始，博世力士樂就開始了在中國的業(yè)務(wù)，并在上海、北京、常州和西安建立了工廠。編輯本段電磁閥特點分類國內(nèi)外的電磁閥從原理上分為三大類（即：直動式、分步直動式、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)別又分為六個分支小類（直動膜片結(jié)構(gòu)、分步重片結(jié)構(gòu)、先導(dǎo)膜式結(jié)構(gòu)、直動活塞結(jié)構(gòu),分步直動活塞結(jié)構(gòu)、先導(dǎo)活塞結(jié)構(gòu)）。直動式電磁閥：原理：通電時，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，電磁力消失，彈簧把關(guān)閉件壓在閥座上，閥門關(guān)閉.特點：在真空、負(fù)壓、零壓時能正常工作，但通徑一般不超過25mm。分布直動式電磁閥原理：它是一種直動和先導(dǎo)式相結(jié)合的原理，當(dāng)入口與出口沒有壓差時，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)入口與出口達到啟動壓差時，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，先導(dǎo)閥利用彈簧力或介質(zhì)壓力推,動關(guān)閉件，向下移動，使閥門關(guān)閉。特點：在零壓差或真空、高壓時亦能可*動作，但功率較大，要求必須水平安裝。先導(dǎo)式電磁閥原理：通電時，電磁力把先導(dǎo)孔打，上腔室壓力迅速下降，在關(guān)閉件周圍形成上低下高的壓差，流體壓力推動關(guān)閉件向上移動，閥門打開；斷電時，彈簧力把先導(dǎo)孔關(guān)閉，入口壓力通過旁通孔迅速腔室在關(guān)閥,件周圍形成下低上高的壓差，流體壓力推動關(guān)閉件向下移動，關(guān)閉閥門。
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Rexroth力士樂電磁閥/德國力士樂電磁閥上海辦事處， ：劉小燕,，，:， ：1339100wj 地址:上海市黃浦區(qū)北京東路668號上海科技 京城東樓20樓C2