?DHQ-011/C/11-IX?24DCDHQ-011/C/11-IX?24DC

武穴黎翔機(jī)電設(shè)備有限公司，詢價(jià)聯(lián)系人：何女士

詢價(jià)電話：0713-6542758，手機(jī)：18934630908????

詢價(jià)傳真：0713-6542758

詢價(jià)QQ:?736567721,704552157

現(xiàn)貨特價(jià)型號(hào)：R900925687?4WRAE10W1-30-22/G24N9K31/F1V??2臺(tái)

0811402141?DBETBEX-1X/315G24K31F1M?????2臺(tái)

由于液壓缸下腔一直存在背壓力，運(yùn)動(dòng)部件自重得到平衡，活塞可以平穩(wěn)地下落，不會(huì)產(chǎn)生超速現(xiàn)象?；钊侣鋾r(shí)，這種回路的功率損失大?；钊Ｖ箷r(shí)，由于單向順序閥的泄漏而使運(yùn)動(dòng)部件緩慢下降，所以它適用于工作部件重量不大

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，對(duì)活塞鎖住時(shí)的定位要求不高的場(chǎng)合。所示為采用液控單向順序閥的平衡回路。當(dāng)換向閥處于中位時(shí)，液控順序閥關(guān)閉，使工作部件停止運(yùn)動(dòng)并能防止其因自重而下落。當(dāng)換向閥左位接入后，液壓油進(jìn)入液壓缸上腔，

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并進(jìn)入液控順序閥的控制口。打開順序閥，液壓缸下腔回油，背壓消失，活塞下行。因此，這種回路效率高，安全可靠，但在活塞下落時(shí)，由于自重作用使得運(yùn)動(dòng)部件下降過快，必然使液壓缸上腔的油壓降低，使液控順序閥的開口關(guān)小

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，阻力增大，從而阻止活塞迅速下降。當(dāng)液控順序閥開口關(guān)小時(shí)，液壓缸下腔的背壓上升，上腔油壓也上升，又使液控順序閥的開口開大。因此，液控順序閥的開口處于不穩(wěn)定狀態(tài)，系統(tǒng)平穩(wěn)性較差（嚴(yán)重時(shí)會(huì)出現(xiàn)斷續(xù)運(yùn)動(dòng)的現(xiàn)象）。由上述內(nèi)容可知，這種回路

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