力士樂(lè)比例閥0811404405 4WRL25V370M-3X/G24Z4/M* 

經(jīng)營(yíng)產(chǎn)品：

閥類(lèi)：電磁閥、換向閥、單向閥、溢流閥、減壓閥、平衡

閥、插裝閥、比例閥等

泵類(lèi)：齒輪泵、柱塞泵、葉片泵等

承諾：保證原裝*，假一賠十 量大價(jià)格好商量?。?/p>

武穴黎翔機(jī)電設(shè)備有限公司REXROTH力士樂(lè)銷(xiāo)售部

詢價(jià)：陳

廣泛應(yīng)用于鋼鐵、冶金、鋁行業(yè)、石油化工、航天、船舶制造、煤炭、水泥、電力、汽車(chē)、工程機(jī)械、食品、藥業(yè)、林業(yè)、紡織、皮革、造紙等行業(yè)領(lǐng)域

比例閥采用閥芯+閥體結(jié)構(gòu)。伺服閥和伺服比例閥主要應(yīng)用在閉環(huán)控制系統(tǒng)，比例閥的驅(qū)動(dòng)裝置是比例電磁鐵。
伺服閥的驅(qū)動(dòng)裝置是力馬達(dá)或力矩馬達(dá).閥體兼作閥套。
驅(qū)動(dòng)裝置不同.所以近些年出現(xiàn)了比例伺服閥。
比例閥一般zui高幾十Hz，伺服閥中位沒(méi)有死區(qū)，伺服閥對(duì)液壓油液的要求更高.性能參數(shù)不同；否則容易堵塞，
用來(lái)控制流量和流向，比例閥要求低一些.比例閥有中位死區(qū)；
比例閥和伺服閥的區(qū)別主要體現(xiàn)在以下幾點(diǎn)：
逐漸向伺服閥靠近，
比例換向閥屬于比例閥的一種，滯環(huán)、中位死區(qū)、頻寬、過(guò)濾精度等特性不同.閥的額定壓降不同；比例換向閥具有與普通換向閥相似的中位機(jī)能，
而比例伺服閥性能介于伺服閥和比例閥之間，因此應(yīng)用場(chǎng)合不同，伺服閥和伺服比例閥采用閥芯+閥套的結(jié)構(gòu)。中位機(jī)能種類(lèi)不同.其它結(jié)構(gòu)的比例閥主要應(yīng)用在開(kāi)環(huán)控系統(tǒng)及閉環(huán)速度控制系統(tǒng)；因?yàn)楸壤y的性能越來(lái)越好；2伺服閥的頻響（響應(yīng)頻率）更高。閥芯結(jié)構(gòu)及加工精度不同.伺服閥與比例閥之間的差別并沒(méi)有嚴(yán)格的規(guī)定。
，可以高達(dá)200Hz左右，需要精過(guò)濾才行，而伺服閥中位機(jī)能只有O型（Rexroth產(chǎn)品的E型）。

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