力士樂（REXROTH)比例方向閥，直動式 保證德國*

REXROTH力士樂比例方向閥直動式的應(yīng)用

它出現(xiàn)對移動式液壓機械整體技術(shù)水平提升具有重要意義。特別是電控先導(dǎo)操作、無線遙控和有線遙控操作等方面展現(xiàn)了其良好應(yīng)用前景。 比例閥和其它器件技術(shù)進步使工程車輛擋位、轉(zhuǎn)向、制動和工作裝置等各種系統(tǒng)電氣控制成為現(xiàn)實。一般需要位移輸出機構(gòu)可采用類似于比例伺服控制手動多路閥驅(qū)動器完成。電氣操作具有響應(yīng)快、布線靈活、可實現(xiàn)集成控制和與計算機接口容易等優(yōu)點，現(xiàn)代工程機械液壓閥已越來越多采用電控先導(dǎo)控制電液比例閥（或電液開關(guān)閥）代替手動直接操作或液壓先導(dǎo)控制多路閥。采用電液比例閥（或電液開關(guān)閥）另一個顯著優(yōu)點是工程車輛上可以大大減少操作手柄個數(shù)，這使駕駛室布置簡潔，能夠有效降低操作復(fù)雜性，對提高作業(yè)質(zhì)量和效率都具有重要實際意義<strong>REXROTH力士樂比例方向閥</strong>直動式在平常中我們都把控制比例的閥的統(tǒng)稱為壓力控制閥。比例閥有時候也簡稱為壓力閥，主要是用來滿足對執(zhí)行機構(gòu)提出的力或力矩的要求。比例閥里有密閉的腔，在的不同位置開有通孔，每個孔都通向不同的油管，腔中間是閥，兩面是兩塊電磁鐵，哪面的磁鐵線圈通電閥體就會被吸引到哪邊，通過控制閥體的移動來檔住或漏出不同的排油的孔，而進油孔是常開的，液壓油就會進入不同的排油管，然后通過油的壓力來推動油剛的活塞，活塞又帶動活塞桿，活塞竿帶動機械裝置動。

力士樂（REXROTH)比例方向閥，直動式 保證德國*

力士樂比例方向閥

這樣通過控制電磁鐵的電流就控制了機械運動。<br /><strong>REXROTH力士樂比例方向閥直動式</a></strong>一般采用兩端承壓面積不等的差徑活塞結(jié)構(gòu)。比例閥不工作時，差徑活塞2在彈簧3的作用下處于上極限位置。比例閥是閥內(nèi)比例電磁鐵輸入電壓信號產(chǎn)生相應(yīng)動作，使工作閥閥芯產(chǎn)生位移，閥口尺寸發(fā)生改變并以此完成與輸入電壓成比例壓力、流量輸出元件。閥芯位移也可以以機械、液壓或電形式進行反饋。電液比例閥具有形式種類多樣、容易組成使用電氣及計算機控制各種電液系統(tǒng)、控制精度高、安裝使用靈活以及抗污染能力強等多方面優(yōu)點，應(yīng)用領(lǐng)域日益拓寬。近年研發(fā)生產(chǎn)比例閥和比例多路閥充分考慮到工程機械使用特點，具有先導(dǎo)控制、負(fù)載傳感和壓力補償?shù)裙δ?/span>

力士樂（REXROTH)比例方向閥，直動式 保證德國*

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力士樂（REXROTH)比例方向閥，直動式 保證德國*