LFA25RF-7X REXROTH插裝閥 德國博世力士樂REXROTH插裝閥 插裝電磁閥

庫存大量REXROTH柱塞泵A10VSO,齒輪泵PGH4\5,PGF1/PGF2/PGF3,電磁閥4WE，電子變量泵SYDFEE-2X,電液比例控制閥0811,電液換向閥4WEH、4WE,減壓閥DR10、DR20、疊加閥ZD、Z1S、Z2S,ZDR電磁溢流閥DBW，直動式溢流閥DBD、0532，先導溢流閥DB10、DB20,電磁球閥M-S、M-3S,力士樂電液比例控制閥\放大器、壓力繼電器0811，伺服驅(qū)動，電機

LFA25RF-7X REXROTH插裝閥

結(jié)構(gòu)原理

主要零件有閥芯、閥體和螺母。閥體上右邊是進油口，左邊是出油口。閥芯一端開有三角尖槽，另-端加工有螺紋，旋轉(zhuǎn)閥芯即可軸向移動改變閥口過流面積。為平衡液壓徑向力，三角槽須對稱布置。

調(diào)速閥定差減壓閥與節(jié)流閥串聯(lián)而成，用來調(diào)節(jié)通過的流量自動補

償負載變化的影響。

特點:

閥芯為錐閥，密封性能好，且動作靈敏;

通流能力大，抗污染;

一閥多用，易組成各式系統(tǒng)，結(jié)構(gòu)緊湊。

特別對大流量及非礦物油介質(zhì)的場合，優(yōu)點更為突出。

插裝閥基本組件由閥芯、閥套、彈簀和密封圈組成。根據(jù)用途不同分為方向閥組件、壓力閥組件和流量閥組件。

插裝閥的應用

單向閥

將方向閥組件的控制口通過閥塊和蓋板上的通道與油口A或B直接溝通，可組成單向閥。

二通閥

由一個二位三通電磁滑閥控制方向閥組件控制腔的通油方式，可組成二位二通閥。

三通閥

由兩個方向閥組件并聯(lián)而成，對外形成-一個壓力油口、-一個工作油口和一一個回油口。三通插裝閥的工作狀態(tài)數(shù)取決于先導換向閥的工作位置數(shù)。

四通閥由兩個三通閥并聯(lián)而成。

疊加閥以板式閥為基礎(chǔ)，每個疊加閥不僅起到單個閥的功能，而且還溝通閥與閥的流道。換向閥安裝在上方，對外連接油口開在下邊的底板上，其他的閥通過螺栓連接在換向閥和底板之間。

LFA25RF-7X REXROTH插裝閥

泄壓功能

用于泄壓功能的插裝閥 (1)（類型 LC . DB...）設(shè)計為無面積差的座閥（B 口無有效面積）。油口 A 的有效壓力通過先導供油孔 (5) 引導至元件的彈簧側(cè) (6)。在先導控制閥 (4) 設(shè)置的壓力下，閥芯 (3) 進行壓力補償并由彈簧力關(guān)閉。

達到設(shè)定壓力后，閥芯 (3) 打開，端口 A 的壓力根據(jù)壓力-流量特性進行限制。

減壓功能

休息位置關(guān)閉

對于具有開啟特性的減壓功能，應用了限壓插裝閥（LC..DB40D...型）和帶減壓先導控制閥（LFA..DR...型）的控制蓋。先導油通過供油孔和打開的先導控制閥從端口 A 導向 B 側(cè)。

主閥芯打開，從 A 口到 B 口的流量被釋放。

達到設(shè)定壓力后，閥芯關(guān)閉，端口 B 的壓力根據(jù)壓力-流量特性降低。二次側(cè)增加的電位壓力通過先導控制閥的第三路排放到油箱。方向閥的設(shè)置可以實現(xiàn)附加的閉鎖功能（LFA..DRW...型）。

壓力排序功能

此功能可實現(xiàn)第二個系統(tǒng)的壓力相關(guān)連接。

所需的切換壓力在集成在控制蓋中的先導控制閥上設(shè)置。

先導供油可以通過外部（先導油口 X）或內(nèi)部（從 A 口經(jīng)先導油口 X 或 Z2）實現(xiàn)。

先導控制彈簧室通過油口 Y 或 Z1 被引導，減壓到油箱。

電路示例

示例 1：（低壓系統(tǒng)的壓力相關(guān)卸載電路）

在圖示的回路中，系統(tǒng)通過高壓泵和低壓泵供氣。系統(tǒng)壓力p S從高壓側(cè)通過先導控制閥上的先導油口X對外作用，達到設(shè)定壓力值后將低壓側(cè)設(shè)置為減壓循環(huán)。止回閥 RV（不包括在供貨范圍內(nèi)）阻止高壓系統(tǒng)與現(xiàn)已減壓的低壓系統(tǒng)連接。

在達到先導控制彈簧上設(shè)定的壓力時，先導控制閥被切換，主閥到油箱的彈簧腔被卸載。主閥芯打開，A 到 B 的連接被釋放。

對于 LFA..DZW... 型，除了液壓回路外，還可以通過電動先導控制閥選擇所需的開關(guān)位置（不包括在控制蓋 LFA..DZ... 的交付范圍內(nèi)） ）。

示例 2：（用于第二個系統(tǒng)的壓力相關(guān)連接的電路）

有了這個回路，在系統(tǒng)1的壓力達到規(guī)定值之前，系統(tǒng)2是不連接的。先導油從主閥A口內(nèi)部排出。

LFA25RF-7X REXROTH插裝閥型號

力士樂REXROTH二通插裝閥、定向功能，控制蓋板LFA..RF

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力士樂REXROTH二通插裝閥、定向功能，控制蓋板LFA..WEA

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R900346628 LFA25WEA-6X/A10

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R900365069 LFA25WEA-6X/A10P10

R900511620 LFA25WEA-6X/A10P10MK

R900355687 LFA25WEA-6X/A10P10T10

R900448932 LFA25WEA-6X/A10P10T10V

R900903615 LFA25WEA-6X/A10P10T12

R900352984 LFA25WEA-6X/A10P12

R900328599 LFA25WEA-6X/A10P12/12

R900350022 LFA25WEA-6X/A10P15

R900354211 LFA25WEA-6X/A10P15

R900363687 LFA25WEA-6X/A10P20

R900517488 LFA25WEA-6X/A10T08

R900524481 LFA25WEA-6X/A10T10

R900554121 LFA25WEA-6X/A10V

R900361520 LFA25WEA-6X/A10V/12

R900358486 LFA25WEA-6X/A12

R900450761 LFA25WEA-6X/A12/12

R900366769 LFA25WEA-6X/A12P08

R900510225 LFA25WEA-6X/A12P08T08

R900585775 LFA25WEA-6X/A12P10

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R900525307 LFA25WEA-6X/A12P15V

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R900358485 LFA25WEA-6X/A14

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R900590792 LFA25WEA-6X/P10T12

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R900393143 LFA25WEA-6X/P15

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R900385515 LFA25WEA-6X/T05V/12

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R900355129 LFA25WEA-6X/V/12

R900910273 LFA25WEA-7X/

R900932368 LFA25WEA-7X//12

R901393684 LFA25WEA-7X/=NE

R901305319 LFA25WEA-7X/A05

R900957690 LFA25WEA-7X/A05/12

R900912681 LFA25WEA-7X/A05P05

R900778042 LFA25WEA-7X/A05P08

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R901036959 LFA25WEA-7X/A05T05V

R900912679 LFA25WEA-7X/A06

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R900978106 LFA25WEA-7X/A06P10

R900960201 LFA25WEA-7X/A06P10T08/12

R900959595 LFA25WEA-7X/A07/12

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R901214921 LFA25WEA-7X/A07P07T07

R900912682 LFA25WEA-7X/A07P12

R900925010 LFA25WEA-7X/A08

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R900929808 LFA25WEA-7X/A08P08T08

R901388530 LFA25WEA-7X/A08P08T08V

R901181517 LFA25WEA-7X/A08P08T12V

R901438861 LFA25WEA-7X/A08P08V

R900940525 LFA25WEA-7X/A08P10

R900945178 LFA25WEA-7X/A08P10T06

R901046878 LFA25WEA-7X/A08P10V

R900725045 LFA25WEA-7X/A08P12T08

R900725052 LFA25WEA-7X/A08P18T05

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R900943949 LFA25WEA-7X/A08V

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R900957443 LFA25WEA-7X/A10/12

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R900972728 LFA25WEA-7X/A10P08

R900947473 LFA25WEA-7X/A10P08/12

R900912683 LFA25WEA-7X/A10P10

R900922484 LFA25WEA-7X/A10P10T10

R901115975 LFA25WEA-7X/A10P10T10V

R901262240 LFA25WEA-7X/A10P10V

R901033664 LFA25WEA-7X/A10P12

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R900747535 LFA25WEA-7X/A10P12T12

R900961742 LFA25WEA-7X/A10P15

R901004670 LFA25WEA-7X/A10T08

R901101637 LFA25WEA-7X/A10T10

R901187581 LFA25WEA-7X/A10T12

R900928564 LFA25WEA-7X/A10V

R901174957 LFA25WEA-7X/A10V/12

R900960713 LFA25WEA-7X/A12

R900928975 LFA25WEA-7X/A12P10

R900932928 LFA25WEA-7X/A12P12

R900732634 LFA25WEA-7X/A12P12T12

R901423907 LFA25WEA-7X/A12P12T12V

R901064672 LFA25WEA-7X/A12P12V

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R900619991 LFA25WEA-7X/A12P15/12

R901062382 LFA25WEA-7X/A12P15T10

R901033665 LFA25WEA-7X/A12P20T12

R901263606 LFA25WEA-7X/A12P20T15

R900975989 LFA25WEA-7X/A12T12

R900928339 LFA25WEA-7X/A15

R900979177 LFA25WEA-7X/A15P08

R900968095 LFA25WEA-7X/A15P15

R901082404 LFA25WEA-7X/A15P15T15

電磁閥線圈的額定電壓有DC12V、DC24V、AC24V（50/60Hz）、AC110V（50/60Hz）、AC220V（50/60Hz）、AC380V（50/60Hz）。一般在電氣設(shè)計時要么采用AC220V（不需加裝開關(guān)電源，成本低、線路簡單而便于維護）、要么采用DC24V（常用的的安全電壓、開關(guān)電源/電磁閥線圈都易于維修更換）。

檢測電磁閥好壞的方法：先給電磁閥通上被控制的介質(zhì)（帶壓力的液體、氣體<空氣>，壓力值為電磁閥使用壓力范圍的中間值），再給電磁閥線圈通電，如果被控制介質(zhì)有從通到斷或從斷到通的狀態(tài)的變化，那么電磁閥就是好的，否則就是有問題的。