4WRA10W30-22/G24N9K4/V力士樂比例閥

4WRA10W30-22/G24N9K4/V力士樂比例閥

液壓系統(tǒng)的組成及其作用

一個完整的液壓系統(tǒng)由五個部分組成，即動力元件、執(zhí)行元件、控制元件、輔助元件（附件）和液壓油。

動力元件的作用是將原動機的機械能轉(zhuǎn)換成液體的壓力能，指液壓系統(tǒng)中的油泵，它向整個液壓系統(tǒng)提供動力。液壓泵的結(jié)構(gòu)形式一般有齒輪泵、葉片泵和柱塞泵。

執(zhí)行元件(如液壓缸和液壓馬達)的作用是將液體的壓力能轉(zhuǎn)換為機械能，驅(qū)動負(fù)載作直線往復(fù)運動或回轉(zhuǎn)運動。

控制元件(即各種液壓閥)在液壓系統(tǒng)中控制和調(diào)節(jié)液體的壓力、流量和方向。根據(jù)控制功能的不同，液壓閥可分為村力控制閥、流量控制閥和方向控制閥。壓力控制閥又分為益流閥(安全閥)、減壓閥、順序閥、壓力繼電器等；流量控制閥包括節(jié)流閥、調(diào)整閥、分流集流閥等；方向控制閥包括單向閥、液控單向閥、梭閥、換向閥等。根據(jù)控制方式不同，液壓閥可分為開關(guān)式控制閥、定值控制閥和比例控制閥。

輔助元件包括油箱、濾油器、油管及管接頭、密封圈、快換接頭、高壓球閥、膠管總成、測壓接頭、壓力表、油位油溫計等。

液壓油是液壓系統(tǒng)中傳遞能量的工作介質(zhì)，有各種礦物油、乳化液和合成型液壓油等幾大類。

比例閥按功能分為三大類

(1)比例壓力閥。有溢流閥減壓閥,分別有直動和先導(dǎo)兩種結(jié)構(gòu);可連續(xù)地或按比例地遠程控制其輸出油液壓力;

(2)比例換向閥。有直動和先導(dǎo)兩種結(jié)構(gòu),直動閥有帶位移傳感器和不帶位移傳感器兩類。由于使用了比例電磁鐵閥芯不僅可以換位，而且換位的行程可以連續(xù)地或按比例地變化。因而連通油口間的通流面積也可以連續(xù)或按比例地變化。所以比例換向閥不僅能夠控制執(zhí)行元件的方向而且能夠控制其速度。因為這個原因比例閥中的比例換向閥應(yīng)用也為普遍;

(3)比例流量閥。有比例調(diào)速閥和比例溢流流量控制閥,可連續(xù)地或按比例地遠程控制其輸出流量。

比例閥的輸入單元是電-機械轉(zhuǎn)換器,它將輸入的電信號轉(zhuǎn)換成機械量轉(zhuǎn)換器有伺服電機和步進電機力馬達和力矩馬達比例電磁鐵等形式。但常用的比例閥大都采用了比例電磁鐵，比例電磁鐵根據(jù)電磁原理設(shè)計,能使其產(chǎn)生的機械量(力或力矩和位移)與輸入電信號(電流)的大小成比例,再連續(xù)地控制液壓閥閥芯的位置，進而實現(xiàn)連續(xù)地控制液壓系統(tǒng)的壓力方向和流量。比例電磁鐵的結(jié)構(gòu)，它由線圈、銜鐵推桿等組成,當(dāng)有信號輸入線圈時,線圈內(nèi)磁場對銜鐵產(chǎn)生作用力,銜鐵在磁場中按信號電流的大小和方向成比例連續(xù)地運動,再通過固連在一起的銷釘帶動推桿運動,從而控制滑閥閥芯的運動。應(yīng)用廣泛的比例電磁鐵是耐高壓直流比例電磁鐵。

4WRA10W30-22/G24N9K4/V力士樂比例閥

4WRA產(chǎn)品說明

在閥板設(shè)計中兩位四通及三位四通比例方向閥用作直動式設(shè)備。通過帶對中螺紋和可拆卸線圈的比例電磁鐵進行操作。線圈由外部控制電子元件進行控制。

設(shè)置：

閥門的基本構(gòu)成包括：

帶連接面的殼體 (1)

帶有壓縮彈簧（3 和 4）的控制閥芯 (2)

帶對中螺紋的線圈（5 和 6）

功能：

線圈（5 和 6）斷電后，通過壓縮彈簧（3 和 4）使控制閥芯 (2) 保持在中心位置

通過為比例電磁鐵通電直接對控制閥芯 (2) 進行操作，例如控制線圈“b”(6)

將控制閥芯 (2) 與電氣輸入信號成比例地向左移動

通過具有漸進流體特性的節(jié)流橫截面，進行從 P 到 A 及從 B 到 T 的連接

關(guān)閉線圈 (6)

控制閥芯 (2) 在壓縮彈簧 (3) 的作用下返回到中心位置

帶兩個閥芯位置的閥門（型號 4WRA...A...）：

基本上，此型號閥的功能與帶三個閥芯位置的閥門功能相對應(yīng)。但是，此雙閥芯位置閥僅配有線圈“a”。它配有帶 NG 6 的保護塞 (8.1) 或帶 NG10 的蓋 (8.2) 來代替第二個比例電磁鐵。

注意：

不得讓油箱管路排空運行。在相應(yīng)的安裝條件下，必須安裝一個預(yù)載閥（預(yù)載壓力約為 2 bar）。

4WRA10W30-22/G24N9K4/V力士樂比例閥供應(yīng)型號

力士樂REXROTH比例方向閥，直動式

力士樂REXROTH二位四通和三位四通比例方向閥直控式，閥芯不帶位移電反饋，不帶集成式放大版（OBE）4WRA

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R900784152 4WRA6W30-2X/G24N2JK10/V-740

R900902095 4WRA6W30-2X/G24N9K4/V

R900926975 4WRA6W30-2X/G24N9K4/V-589

R901225179 4WRA6W30-2X/G24N9K4/VL

R900900160 4WRA6W30-2X/G24N9Z4/V

R900908170 4WRA6W30-2X/G24N9Z4/V-589

R900966095 4WRA6W30-2X/G24NEXJ/V

R900913511 4WRA6W30-2X/G24Z4/V

R900710528 4WRA6WA07-2X/G24K4/V

R900787374 4WRA6WA07-2X/G24N9K4/V-589

R900954059 4WRA6WA15-2X/G24K4/V

R901008492 4WRA6WA15-2X/G24K4/V-589

R901367493 4WRA6WA15-2X/G24N2JK10/M-740

R900961533 4WRA6WA15-2X/G24N9K4/V

R900963296 4WRA6WA15-2X/G24N9K4/V-589

R900913736 4WRA6WA15-2X/G24N9Z4/V

R900902463 4WRA6WA15-2X/G24N9Z4/V-589

R900935535 4WRA6WA30-2X/G24K4/V

R900244238 4WRA6WA30-2X/G24N9K4/V

R900947417 4WRA6WA30-2X/G24N9K4/V-589

R900901914 4WRA6WA30-2X/G24Z4/V

R900761800 4WRA6WB03-2X/G24N9K4/V-589

R901000767 4WRA6WB07-2X/G24K4/V

R901040903 4WRA6WB07-2X/G24N9K4/V

R901206173 4WRA6WB07-2X/G24N9K4/V-589

R901055110 4WRA6WB15-2X/G24K4/V

R901266770 4WRA6WB15-2X/G24K4/V-589

R901017934 4WRA6WB30-2X/G24K4/V

R978017292 4WRA6X30-2X/EG..N9..SO43A-1800

R978919010 4WRA6X30-2X/G24N9K4/V-874

R978916415 4WRA10EA30-2X/G24N9K4/VSO43A-1681

R978009437 4WRA10W1-60-2X/G24N9K4/VSO43A-1779

R902650718 DIR.-CO****OLVALVE 4WRA6E07-2X/G24NJK&

R902650387 DIR.-CO****OLVALVE 4WRA6E30-2X/G24N9K&

R902416026 DIR.-CO****OLVALVE 4WRA6E30-2X/G24N9Z&

R910988077 DIR.-CO****OLVALVE 4WRA6V15-2X/G24N9K&

R910991712 DIR.-CO****OLVALVE 4WRA6V30-2X/G24N9K&

R910988078 DIR.-CO****OLVALVE 4WRA10V30-2X/G24N9K4&

R910988165 DIR.-CO****OLVALVE 4WRA10V30-2X/G24N9Z4&

R902435562 DIR.-CO****OLVALVE 4WRA6EO7-2X/G24NJK31&

力士樂REXROTH二位四通和三位四通比例方向閥直控式，閥芯不帶位移電反饋，帶集成式放大版（OBE）4WRAE

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R901311329 4WRAE10E1-30-2X/G24K31/F1V

R900936848 4WRAE10E1-30-2X/G24N9K31/A1V

R901213358 4WRAE10E1-30-2X/G24N9K31/F1V

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R900954409 4WRAE10E1-60-2X/G24K31/A1V

R901049206 4WRAE10E1-60-2X/G24K31/F1V

R900909658 4WRAE10E1-60-2X/G24N9K31/A1V

R901384952 4WRAE10E1-60-2X/G24N9K31/F1M

R900773932 4WRAE10E1-60-2X/G24N9K31/F1V

R900904991 4WRAE10E1-60-2X/G24N9Z31/A1V

R978016005 4WRAE10E3-60-2X/G24N9K31/A1V

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R900904010 4WRAE10E30-2X/G24N9K31/F1V

R900570901 4WRAE10E30-2X/G24N9Z31/A1V

R900934721 4WRAE10E30-2X/G24Z31/A1V

R900954083 4WRAE10E60-2X/G24K31/A1V

R900965674 4WRAE10E60-2X/G24K31/F1V

R900558356 4WRAE10E60-2X/G24N9K31/A1V

R901038922 4WRAE10E60-2X/G24N9K31/A1V-280

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R900572096 4WRAE10E60-2X/G24N9Z31/A1V

R900908419 4WRAE10E60-2X/G24N9Z31/F1V

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R900940206 4WRAE10EA30-2X/G24N9K31/A1V

R900954109 4WRAE10EA30-2X/G24N9K31/F1V

R900914273 4WRAE10EA30-2X/G24N9Z31/A1V

R900954086 4WRAE10EA60-2X/G24K31/A1V

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R900546669 4WRAE10EA60-2X/G24N9Z31/A1V

R900939576 4WRAE10EB30-2X/G24N9K31/A1V

R900906761 4WRAE10EB30-2X/G24N9Z31/A1V

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R901316266 4WRAE10EB60-2X/G24N9K31/F1V

R900551277 4WRAE10EB60-2X/G24N9Z31/A1V

R900913578 4WRAE10V60-2X/G24N9Z31/A1V

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R900732536 4WRAE10W1-60-2X/G24K31/F1V

R900936006 4WRAE10W1-60-2X/G24N9K31/A1V

R900949757 4WRAE10W1-60-2X/G24N9K31/F1V

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R901059583 4WRAE10W30-2X/G24K31/A1V-280

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R901416065 4WRAE10W60-2X/G24N9K31/A1M

R900900988 4WRAE10W60-2X/G24N9K31/A1V

R900974924 4WRAE10W60-2X/G24N9K31/A1V-280

R900920055 4WRAE10W60-2X/G24N9K31/F1V

R900570097 4WRAE10W60-2X/G24N9Z31/A1V

R901239551 4WRAE10W60-2X=G24N9K31/F1V

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R900954091 4WRAE10WA60-2X/G24K31/A1V

R900904801 4WRAE10WA60-2X/G24N9K31/A1V

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R900703358 4WRAE6V07-2X/G24N9K31/A1V

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R900736894 4WRAE6W03-2X/G24N9K31/A1V

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R900954076 4WRAE6W07-2X/G24K31/A1V

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R900932003 4WRAE6W07-2X/G24N9K31/A1V

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R901026400 4WRAE6W1-07-2X/G24K31/A1V

R901099279 4WRAE6W1-07-2X/G24K31/F1V

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R900914844 4WRAE6W30-2X/G24N9Z31/A1V-612

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R901239200 4WRAE6WB15-2X/G24N9K31/F1V

R900941851 4WRAE6WB30-2X/G24N9K31/A1V

力士樂REXROTH比例方向閥，直控式4WRA ...XE

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R901097419 4WRA6E15-2X/G24XEJ/V

R901154863 4WRA6E30-2X/G24XEJ/V

R901254509 4WRA6EA03-2X/G24XEJ/V

R901262600 4WRA6EA07-2X/G24XEJ/V

R901393419 4WRA6EA15-2X/G24XEJ/V

R901173051 4WRA6EA30-2X/G24XEJ/V

R901271117 4WRA6EB07-2X/G24XEJ/V

R901061252 4WRA6W07-2X/G24XEJ/V

R901368290 4WRA6W1-07-2X/G24XEJ/V

R901066698 4WRA6W1-15-2X/G24XEJ/V

R901028052 4WRA6W1-30-2X/G24XEJ/V

R901177023 4WRA6W15-2X/G24XEJ/V

R901053397 4WRA6W30-2X/G24XEJ/V

R901123241 4WRA6WA30-2X/G24XEJ/V

力士樂REXROTH二位四通和三位四通比例方向閥直控式，閥芯帶位移電反饋，不帶集成式放大版（OBE）4WRE

安全閥是啟閉件受外力作用下處于常閉狀態(tài)，當(dāng)設(shè)備或管道內(nèi)的介質(zhì)壓力升高超過規(guī)定值時，通過向系統(tǒng)外排放介質(zhì)來防止管道或設(shè)備內(nèi)介質(zhì)壓力超過規(guī)定數(shù)值的特殊閥門。安全閥屬于自動閥類，主要用于鍋爐、壓力容器和管道上，控制壓力不超過規(guī)定值，對人身安全和設(shè)備運行起重要保護作用。注安全閥必須經(jīng)過壓力試驗才能使用。