上海韋米機(jī)電設(shè)備有限公司

E5HP4-TA/EI/40V-D24K1電液換向閥 意大利迪普馬DUPLOMATIC電磁閥 電液換向閥

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E5HP4-TA/EI/40V-D24K1電液換向閥

液壓閥是用來控制液壓系統(tǒng)中油液的壓力、流量和液體流動(dòng)方向。

二、液壓閥的分類

按功能分:

方向控制閥(單向閥、換向閥)

壓力控制閥(溢流閥、減壓閥、順序閥、壓力繼電器)

流量控制閥(節(jié)流閥、調(diào)速閥)

按操縱方式分:

手動(dòng)和腳踏、機(jī)動(dòng)、電動(dòng)、液動(dòng)、電液動(dòng)等。

共同點(diǎn)

(1) 在結(jié)構(gòu)上，所有的閥都有閥體、閥芯(轉(zhuǎn)閥或滑閥)和驅(qū)使閥芯動(dòng)作的部件(如彈簧、電磁鐵)組成。

(2)在工作原理上，所有閥的開口大小，閥進(jìn)、出口壓差以及流過閥的流量之間的關(guān)系都符合孔口流量公式，僅是各種閥控制的參數(shù)各不相同而已。

三、對(duì)液壓閥的基本要求

(1)動(dòng)作靈敏，使用可靠，工作時(shí)沖擊和振動(dòng)小。

(2)油液流過的壓力損失小。

(3)密封性能好。

(4)結(jié)構(gòu)緊湊，安裝、調(diào)整、使用、維護(hù)方便，通用性大。

電液閥是由一個(gè)主閥和兩個(gè)電磁閥組成，主閥響應(yīng)速度的控制是兩個(gè)柱塞閥，安裝于主閥的入口和出口。通過兩個(gè)柱塞閥細(xì)微調(diào)節(jié)主閥的啟閉速度。調(diào)整這些裝置（柱塞閥）以控制流入和流出活塞上方介質(zhì)的流量。達(dá)到主閥啟閉速度能基于介質(zhì)的粘度及壓力調(diào)整的目的。

常開（N.O）和常閉（N.C）電磁閥分別安裝在主閥的進(jìn)油回路和出油回路中，用于控制主閥的動(dòng)作，當(dāng)兩電磁閥通電時(shí)，進(jìn)油孔（上游閥）回路關(guān)閉，先導(dǎo)孔（下游閥）回路打開，活塞上腔泄壓，活塞上行，主閥打開。反之，活塞下行，主閥關(guān)閉。在主閥開啟和關(guān)閉過程中，可將流量（流速）信號(hào)及閥塞位置信號(hào)傳送給計(jì)算機(jī)，經(jīng)過計(jì)算機(jī)處理后發(fā)出相應(yīng)的指令，控制兩個(gè)電磁導(dǎo)閥的通、斷電狀態(tài)，使活塞的上下腔的液壓差產(chǎn)生變化，從而將活塞控制在所需的開啟度上，實(shí)現(xiàn)對(duì)管道介質(zhì)流量的控制。

E5HP4-TA/EI/40V-D24K1電液換向閥

E*P4

先導(dǎo)式電液換向閥

E4 CETOP P05

E5 CETOP 08

p max (參見性能參數(shù)表)

Q max (參見性能參數(shù)表)

— E*P4型 閥是一 種板 式安 裝4通電液 換向 閥。 其安 裝

尺寸符合CETOP標(biāo)準(zhǔn)。先導(dǎo)閥為規(guī)格電液方向閥。

— CETOP05規(guī)格閥的較大流量為140l/min，CETOP 08規(guī)格

閥的較大流量600 l/min。

— 該閥具有不同的閥芯形式(見第2節(jié))和不同的閥芯控制方

式。

— 該閥具有電磁控制和液壓控制兩種方式。液壓控制通過X

口和Y口實(shí)現(xiàn)

— 可以通 過對(duì) 主 閥閥 體 上的 先 導(dǎo)孔 和 泄漏 口 堵塞 的更

換，使閥實(shí)現(xiàn)不同的先導(dǎo)及泄漏功能 (見第6節(jié))。

E5HP4-TA/EI/40V-D24K1電液換向閥型號(hào)

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MD1D-2TA/5024VCCDUPLOM.

止回閥是指啟閉件為圓形閥瓣并靠自身重量及介質(zhì)壓力產(chǎn)生動(dòng)作來阻斷介質(zhì)倒流的一種閥門。屬自動(dòng)閥類，又稱逆止閥、單向閥、回流閥或隔離閥。閥瓣運(yùn)動(dòng)方式分為升降式和旋啟式。升降式止回閥與截止閥結(jié)構(gòu)類似，僅缺少帶動(dòng)閥瓣的閥桿。介質(zhì)從進(jìn)口端(下側(cè)）流入，從出口端（上側(cè)）流出。當(dāng)進(jìn)口壓力大于閥瓣重量及其流動(dòng)阻力之和時(shí)，閥門被開啟。反之，介質(zhì)倒流時(shí)閥門則關(guān)閉。旋啟式止回閥有一個(gè)斜置并能繞軸旋轉(zhuǎn)的閥瓣，工作原理與升降式止回閥相似。止回閥常用作抽水裝置的底閥，可以阻止水的回流。