D3FPE50YB9HB7039P80派克伺服閥

D3FPE50YB9HB7039P80派克伺服閥

伺服閥屬于兩級(jí)閥，第一級(jí)為噴嘴檔板式，由控制信號(hào)控制其出口壓力，第二級(jí)為滑閥式，執(zhí)行控制級(jí)至剎車缸的壓力。當(dāng)無(wú)信號(hào)作用時(shí)， 由於壓力噴嘴出口油壓力的作用，使伺服閥擋板靠在回油噴嘴上，此時(shí)壓力口的油壓作用在滑閥閥芯上，使剎車口同計(jì)量油口直接連通，剎車口壓力同飛行員控制的計(jì)量油壓相等，當(dāng)機(jī)輪角速度檢測(cè)到滑行速度同基準(zhǔn)滑行速度有偏差時(shí)，力矩馬達(dá)接收到偏差電信號(hào)，此時(shí)力矩馬達(dá)驅(qū)動(dòng)檔板向壓力噴嘴偏轉(zhuǎn)，使作用在閥芯上端油壓下降，在閥芯下端油壓作用下，閥芯上移，關(guān)小計(jì)量壓力油口，這將導(dǎo)致控制口壓力降低，控制口壓力降低到某一值時(shí)，就有對(duì)應(yīng)的制動(dòng)壓力。

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