REXROTH比例電液伺服閥/A10VS028DFR1/31RPPA12N00

REXROTH比例電液伺服閥的越來越好，逐漸向伺服閥靠近，所以近些年出現(xiàn)了比例伺服閥。
比例閥和伺服閥的區(qū)別主要體現(xiàn)在以下幾點(diǎn)：
1.驅(qū)動(dòng)裝置不同。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)；
2.參數(shù)不同。滯環(huán)、中位死區(qū)、頻寬、過濾精度等特性不同，因此應(yīng)用場(chǎng)合不同，伺服閥和伺服比例閥主要應(yīng)用在閉環(huán)控制系統(tǒng)，其它結(jié)構(gòu)的比例閥主要應(yīng)用在開環(huán)控系統(tǒng)及閉環(huán)速度控制系統(tǒng)；
2.1 伺服閥中位沒有死區(qū)，比例閥有中位死區(qū)；
2.2 伺服閥的頻響（響應(yīng)頻率）更高，可以高達(dá)200Hz左右，比例閥一般zui高幾十Hz；
2.3 伺服閥對(duì)液壓油液的要求更高，需要精過濾才行，否則容易堵塞，比例閥要求低一些；
3.閥芯結(jié)構(gòu)及加工精度不同。比例閥采用閥芯+閥體結(jié)構(gòu)，閥體兼作閥套。伺服閥和伺服比例閥采用閥芯+閥套的結(jié)構(gòu)。
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REXROTH比例電液伺服閥/A10VS028DFR1/31RPPA12N00