4WRZ16W8-100-7X/6EG24N9EK4/D3V力士樂(lè)比例閥

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4WRZ16W8-100-7X/6EG24N9EK4/D3V
，我們要知道，負(fù)載敏感系統(tǒng)中，通過(guò)節(jié)流閥的流量是不隨負(fù)載壓力的改變而變化的，它僅僅和閥口開(kāi)度的大小成比例。
操作節(jié)流閥（實(shí)際應(yīng)用中為方向控制閥組）改變其閥口開(kāi)度大小，便可以改變泵輸出的流量大小，使其與負(fù)載所需流量相適應(yīng)。
當(dāng)節(jié)流閥閥口開(kāi)度一定時(shí)，負(fù)載的變化不會(huì)影響進(jìn)入執(zhí)行元件的流量。
下面我們?cè)敿?xì)分析上述兩個(gè)過(guò)程：
1、負(fù)載運(yùn)動(dòng)速度需要改變時(shí)（負(fù)載壓力大小不變），只需調(diào)節(jié)節(jié)流閥閥口開(kāi)度，觀察負(fù)載敏感泵的自動(dòng)調(diào)節(jié)過(guò)程
當(dāng)節(jié)流閥的閥口變化時(shí)，動(dòng)態(tài)壓差ΔP將會(huì)大于或小于負(fù)載敏感泵的彈簧預(yù)緊力P彈，此時(shí)負(fù)載敏感閥的閥芯受力處于不平衡狀態(tài)，為了恢復(fù)到受力平衡狀態(tài)，負(fù)載敏感閥的閥芯會(huì)向左或向右移動(dòng)，負(fù)載敏感閥的閥芯的左右移動(dòng)就會(huì)改變泵的排量，從而使泵的輸出流量Q 變大或變小，重新使穩(wěn)定壓差ΔP= P彈 =定值。其具體過(guò)程如下： 力士樂(lè) 比例閥 武漢
A：節(jié)流閥閥口開(kāi)度減小，動(dòng)態(tài)壓差ΔP變大（即閥口對(duì)液流 武漢的節(jié)流作用將有所增大），流動(dòng)阻力的增大被負(fù)載敏感閥的滑閥所感受到，滑閥左端壓力P增大，滑閥會(huì)向右移動(dòng)一段距離，此時(shí)壓力油被引到主控制活塞缸的無(wú)桿腔，在壓力油的作用下，控制活塞左移，泵的斜盤傾角變小，流量變小，動(dòng)態(tài)壓差ΔP變?。▍⒖夹】琢髁抗剑钡絼?dòng)態(tài)壓差ΔP=P彈時(shí)，閥芯受力平衡，泵的斜盤傾角不再變化，此時(shí)泵輸出的流量與節(jié)流口進(jìn)口的流量相匹配；
4WRZ16W8-100-7X/6EG24N9EK4/D3V