52NN-K116-M4-C2A-TT
武穴黎翔機(jī)電設(shè)備有限公司，詢價(jià)：何女士
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圖2.1為單回路充液閥的結(jié)構(gòu)，主要由控制充液壓力上下限的先導(dǎo)閥和充液主閥構(gòu)成，圖中的P、O、A、T分別為油泵壓力油進(jìn)油口、通往下游液壓系統(tǒng)的出口、通往蓄能器出口及回油口。
充液閥的充液過(guò)程為:當(dāng)蓄能器的壓力低于充液閥設(shè)定的下限壓力時(shí)，作用在上限單向閥閥芯3上的液壓力低于先導(dǎo)閥4左端彈簧8的作用力，使下限單向閥6關(guān)閉，上限單向閥3打開(kāi)，蓄能器內(nèi)的壓力油經(jīng)先導(dǎo)閥芯4、節(jié)流通道Ⅱ進(jìn)入主閥右腔，推動(dòng)主閥芯9克服左腔壓力向左移動(dòng)，逐漸降低主閥開(kāi)度，P與O口間的節(jié)流作用造成P口壓力增高。隨后P口與A口間的單向閥打開(kāi)，經(jīng)節(jié)流口向蓄能器供液。當(dāng)蓄能器壓力達(dá)到上*，作用在先導(dǎo)閥右端單向閥閥芯3的液壓力大于左端彈簧壓力，下限單向閥6打開(kāi)，上限單向閥3關(guān)閉，主閥右腔經(jīng)先導(dǎo)閥于T口相通泄壓，在左端壓力作用下克服右端彈簧壓力右移，P口與A口間的單向閥關(guān)閉，恢復(fù)全流量向下游系統(tǒng)供液，充液過(guò)程結(jié)束。
圖2.1
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