Rexroth力士樂液壓比例方向閥

力士樂比例閥是一種新型的液壓控制裝置。在普通壓力閥、流量閥和方向閥上，用比例電磁鐵替代原有的控制部分，按輸入的電氣信號連續(xù)地、按比例地對油流的壓力、流量或方向進行遠距離控制。

按比例閥控制方式分類是指按照比例閥的先導控制閥中的電氣一機械轉換方式來分類，其電控制部分有比例電磁鐵、力矩馬達、直流伺服電動機等多種形式。

首先，比例閥必須有一個配套的放大器，它接受來自于計算機，或者PLC，或者電位器（滑動變阻器）的控制信號，把0-20毫安微弱的信號放大到0-800毫安。計算機的信號太弱了。然后，放大器把放大的信號傳送到電磁閥度，電磁閥依據(jù)傳來的信號大小，克服彈簧力，調節(jié)推桿的行程，輸出流量大約知1升/分鐘,壓力隨信號變化的控制油。

再后，控制油到達主閥芯的兩端，依據(jù)不同的壓力，推動閥芯移動相應的行程，因為閥芯本身有錐度的臺階，與閥體組合，不同的行程得到不道同的過流面積，再入版口壓力穩(wěn)定的情況下，得到不同的流量。最終實現(xiàn)比例功能。比例閥是由計算機（或其他），放大器，比例電磁鐵，錐度臺階的閥芯，入口壓力補償閥（單聯(lián)可以不要），梭閥，內置卸荷閥（把多余的流量送回油箱）等構成的一個完整的體權系。才能真正實現(xiàn)比例功能。

REXROTH力士樂方向閥是具有兩種以上流動形式和兩個以上油口的方向控制閥。是實現(xiàn)液壓油流的溝通、切斷和換向，以及壓力卸載和順序動作控制的閥門。靠閥芯與閥體的相對運動的方向控制閥。有轉 閥式和滑閥式兩種。按閥芯在閥體內停留的工作位 置數(shù)分為二位、三位等;按與閥體相連的油路數(shù)分為 二通、三通、四通和六通等;操作閥芯運動的方式有 手動、機動、電動、液動、電液等型式。

REXROTH力士樂方向閥工作原理：

六通方向閥主要由閥體、密封組件、凸輪、閥桿、手柄和閥蓋等零部件組成（圖1）。閥門由手柄驅動，通過手柄帶動閥桿與凸輪旋轉，凸輪具有定位驅動與鎖定密封組件的開啟與關閉功能。手柄逆時針旋轉，兩組密封組件分別在凸輪的作用下關閉下端的兩個通道，上端的兩個通道分別與管道裝置的進口相通。反之，上端的兩個通道關閉，下端兩個通道與管道裝置的進口相通，實現(xiàn)了不停車換向。

REXROTH力士樂方向閥特點：

1、先導式2級比例方向控制閥，無集成電子元件（OBE）

2、控制體積流量的方向和大小

3、通過帶中心螺紋和可拆卸線圈的比例電磁閥驅動

4、用于板結構：根據(jù)ISO 4401的連接位置

5、輔助驅動裝置，可選

6、以彈簧為中心的閥芯

REXROTH力士樂方向閥分類：

1、機動方向閥，機動方向閥又稱行程閥。

2、電磁方向閥，電磁方向閥是利用電磁吸引力操縱閥芯換位的方向控制閥。

3、電液方向閥，電液方向閥是由電磁方向閥和液動方向閥組成的復合閥。

4、手動方向閥，手動方向閥是用手推杠桿

REXROTH力士樂方向閥優(yōu)點：

動作準確、自動化程度高、工作穩(wěn)定可靠，但需附設驅動和冷卻系統(tǒng)，結構較為復雜；閥瓣式結構則較簡單，多用于流量較小的生產(chǎn)工藝上。

在石油、化工、礦山和冶金等行業(yè)中，六通方向閥是一種重要的流體換向設備。該閥安裝在稀油潤滑系統(tǒng)輸送潤滑油的管道中。通過變換密封組件在閥體中的相對位置，使閥體各通道連通或斷開，從而控制流體的換向和啟停。操縱閥芯換位的方向控制閥。

為大家推薦REXROTH力士樂比例方向閥舉例型號：4WREE10E75-2X/G24K31/A1V

4WRE →直控式比例換向閥，板式結構

E →帶內置放大器（無E可通過連接外部放大器）

10 → 10通經(jīng)（也有6通經(jīng)等）

E →機能符號（也有E1-、V、W、W1-、EA、WA等）

75 →閥的壓差為10bar時的額定流量(NS10) 75 L/min

（也有(NS6)08、16、32，(NS10)25、50、75等）

2X →20至29系列（20至29：安裝和連接尺寸不變）

G24 →24V直流電源

K31 →帶符合E DIN 43 563-AM6-3的插座,不帶插頭 插頭 需單獨訂貨(K4指帶符合DIN 43 650-AM2的插座 不 帶插頭)

A1 →WREE型A1或F1接口：給定值輸入±10 V(F1=給定值 輸入4至20mA)

V →氟橡膠矩形密封圈 符合DIN 51 524 標準的液壓油 （HL,HLP）

Rexroth力士樂液壓比例方向閥

Rexroth比例方向閥部分型號：

4WRA 4WRAE 比例閥

4WRE 4WREE 比例方向閥

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4WRA10E系列

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4WRA10W系列

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