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聯(lián)系電話
上海維特銳實業(yè)發(fā)展有限公司
主營產(chǎn)品: ATOS阿托斯閥,賀德克傳感器,ACE緩沖器 |
聯(lián)系電話
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更新時間:2023-10-24 13:30:17瀏覽次數(shù):806
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REXROTH電磁閥的結(jié)構(gòu)和工作原理
一:力士樂直動式電磁閥
有常閉型和常開型二種。常閉型斷電時呈關閉狀態(tài),當線圈通電時產(chǎn)生電磁力,使動鐵芯克服彈簧力同靜鐵芯吸合直接開啟閥,介質(zhì)呈通路;當線圈斷電時電磁力消失,動鐵芯在彈簧力的作用下復位,直接關閉閥口,介質(zhì)不通。結(jié)構(gòu)簡單,動作可靠,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:常閉型直動式電磁閥通電時,電磁線圈產(chǎn)生電磁吸力把閥芯提起,使關閉件離遠開閥座密封副打開;斷電時,電磁力消失,靠彈簧力把關閉元件壓在閥座上閥門關閉。(常開型與此相反)
特點:在真空、負壓、零壓時能正常工作,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、力士樂分步直動式電磁閥
REXROTH電磁閥采用一次開閥和二次開閥連在一體,主閥和導閥分步使電磁力和壓差直接開啟主閥口。當線圈通電時,產(chǎn)生電磁力使動鐵芯和靜鐵芯吸合,導閥口開啟而導閥口設在主閥口上,且動鐵芯與主閥芯連在一起,此時主閥上腔的壓力通過導閥口卸荷,在壓力差和電磁力的同時作用下使主閥芯向上運動,開啟主閥介質(zhì)流通。當線圈斷電時電磁力消失,此時動鐵芯在自重和彈簧力的作用下關閉導閥孔,此時介質(zhì)在平衡孔中進入主閥芯上腔,使上腔壓力升高,此時在彈簧復位和壓力的作用下關閉主閥,介質(zhì)斷流。結(jié)構(gòu)合理,動作可靠,在零壓差時工作也可靠。如:ZQDF,ZS,2W等。
力士樂電磁閥原理:它是一種直動和先導式相結(jié)合的原理,當入口與出口壓差≤0.05Mpa,通電時,電磁力直接把先導小閥和主閥關閉件依次向上提起,閥門打開。當入口與出口壓差>0.05Mpa,通電時,電磁力先打開先導小閥,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,先導閥和主閥利用彈簧力或介質(zhì)壓力推動關閉件,向下移動,使閥門關閉。
特點:在零壓差或真空、高壓時亦能可靠工作,但功率較大,要求豎直安裝。
三、力士樂間接先導式電磁閥
該系列電磁閥由先導閥和主閥芯著形成通道組合而成;常閉型在未通電時,呈關閉狀態(tài)。當線圈通電時,產(chǎn)生的磁力使動鐵芯和靜鐵芯吸合,導閥口打開,介質(zhì)流向出口,此時主閥芯上腔壓力減少,低于進口側(cè)的壓力,形成壓差克服彈簧阻力而隨之向上運動,達到開啟主閥口的目的,介質(zhì)流通。當線圈斷電時,磁力消失,動鐵芯在彈簧力作用下復位關閉先導口,此時介質(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動,關閉主閥口。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,電磁力驅(qū)動先導閥打開先導閥,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)壓力推動主閥關閉件上移,閥門開啟;斷電時,彈簧力把先導閥關閉,入口介質(zhì)壓力通過先導孔迅速進入主閥上腔在上腔內(nèi)形成壓差,從而使主閥關閉。
力士樂Rexroth電磁閥從原理上分為三大類 ( 即:直動式、分步童先導式 ) 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分支小類 ( 直動膜片結(jié)構(gòu)、分步重片結(jié)構(gòu)、先導膜式結(jié)構(gòu)、直動活塞結(jié)構(gòu)、分步直動活塞結(jié)構(gòu)、先導活塞結(jié)構(gòu) )
力士樂直動式燃氣電磁閥:電磁線圈發(fā)生電磁力把封閉件從閥座上提起,燃氣電磁閥工作原理:通電時。閥門打開;斷電時,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:真空、負壓、零壓時能正常工作。
力士樂散布直動式燃氣電磁閥:當進口與入口沒有壓差時,燃氣電磁閥工作原理:一種直動和先導式相聯(lián)合的原理。通電后,電磁力直接把先導小閥和主閥封閉件依次向上提起,閥門打開。當進口與出口達到啟動壓差時,通電后,電磁力先導小閥,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,先導閥利用彈簧力或介質(zhì)壓力推動封閉件,向下移動,使閥門封閉。但功率較大,力士樂Rexroth電磁閥電磁閥特點:零壓差或真空、高壓時亦能可 * 動作。請求必需水平裝置。
力士樂先導式燃氣電磁閥:燃氣電磁閥把先導孔打開,燃氣電磁閥工作原理:通電時。上腔室壓力敏捷降落,封閉件四周形成上低下高的壓差,流體壓力推動封閉件向上移動,閥門打開;斷電時,彈簧力把先導孔封閉,進口壓力通過旁通孔敏捷腔室在關閥件四周形成下低上高的壓差,流體壓力推動封閉件向下移動,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:流體壓力范疇上限較高。
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