4WRTE16E1-125L-4X/6EG24K31/A1M比例方向阀 德国博世力士乐REXROTH比例伺服阀 比例溢流阀

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4WRTE16E1-125L-4X/6EG24K31/A1M比例方向阀

结构原理

输入信号加大，供气用电磁阀先导阀1换向，而排气用电磁先导阀7处于复位状态，则供气压力从SUP口通过阀1进入先导室5，先导室压力上升，气压力作用在膜片2的上方，则和膜片2相连的供气阀芯4便开启，排气阀芯3关闭，产生输出压力。此输出压力通过压力传感器6反馈至控制回路8。在这里，与目标值进行快速比较修正，知道输出压力与输入信号成一定比例为止，从而得到输出压力与输入信号的变化成比例的变化。由于没有喷嘴挡板机构，故阀对杂质不敏感，可靠性高。

 

特点

1)可实现压力、速度的无较调节，避免了常通的开关式气阀换向时的冲击现象。

2)能实现远程控制和程序控制。

3)与断续控制相比，系统简化，元件大大减少。

4)与液压比例阀相比，体积小、重量轻、结构简单、成本较低，但响应速度比液压系统慢得多，对负载变化也比较敏感。

5)使用功率小、发热少、噪声低。

6)不会发生火灾，不污染环境。受温度变化的影响小。

比例阀三种形态

（1）电磁式 电磁式是指采用比例电磁铁作为电气一机械转换元件的比例阀，比例电磁铁将输入的电流信号转换成力、位移机械信号输出．进而控制压力、流量及方向等参数。

（2）电动式 电动式是指采用直流伺服电动机作为电气一机械转换元件的比例阀，直流伺服电动机将输入的电信号．转换成旋转运动转速，再经丝杆螺母、齿轮齿条或齿轮凸轮等减速装置和变换机构，输出力与位移，进一步控制液压参数。

（3）电液式 电液式是指采用力矩马达和喷嘴挡板的结构为先导控制级的比例阀。对力矩马达输入不同的电信号，并通过同它连接在一起的挡板（有时力矩马达的衔铁就是挡板）输出位移或角位移，改变挡板和喷嘴之间的距离，使喷嘴喷出的油液流阻产生变化，进而控制输小参数。

比例阀是气流只能一个方向流动而不能反向流动的方向控制阀。其工作原理与液压单向阀一样。压缩空气从P口进入，克服弹簧力和摩擦力使单向阀阀口开启，压缩空气从P流至A；当P口无压缩空气时，在弹簧力和A口（腔）余气力作用下；阀口处于关闭状态，使从A至P气流不通。

比例阀应用于不允许气流反向流动的场合，如空压机向气罐充气时，在空压机与气罐之间设置一单向阀，当空压机停止工作时，可防止气罐中的压缩空气回流到空压机。比例阀还常与节流阀、顺序阀等组合成比例阀使用。

4WRTE16E1-125L-4X/6EG24K31/A1M比例方向阀

4WRD E..型比例伺服控制阀(高频响阀)

结构和功能

4WRDE型阀是三级高频响方向阀。该阀可用于开环控制或闭环调节液流的大小和方向，但主要用于闭环调节回路中。

阀主要由下列部分组成:

1.二级先导控制阀由力矩马达( 1 )和由喷嘴挡板阀构成的液压放大器( 5),和用作流量放大级的阀芯衬套组件(6 )(用以控制第三级(7 ))组成。

2.第三级(7)用于流量控制。

3.感应式位移传感器( 8),连接第三级主阀芯( 10)的磁芯(9 )

通过内置电子放大器实现阀闭环控制信号逻辑连接,位置检测系统反馈,和先导阀的控制。

给定值/实际值比较得到的差动电压经过电子控制器放大, 并作为控制偏差量传递到阀的一级。这个信号推动两个控制喷嘴( 3.1, 3.2) 之间的挡板( 2)因而在两个控制腔(11.1.11.2)产生了压差。控制阀芯(4 )因此被推动,并通过相应的液流流到弹簧腔(12.1or12.2)阀芯(10)和带磁芯(9)的位移传感器(8)-直运动,直到实际值和给定值信号再一次相等。在控制条件下;主阀芯( 10 )一直被保持在给定值所对应的位置。

阀芯行程和给定值成正比。通过阀芯( 10 )相对于控制边( 13 )的位置,形成相应的与流量成正比的阀口开度。

阀的动态特性通过电子放大器优化。电子放大器内置于阀上(振荡器,解调器)

零点调节由厂家预先设定,通过闭环控制电子放大器内的电位器, 零点能在名义行程士10%范围内调整。移去阀盖尾部的插头,可以对内置闭环电子放大器进行操作。

4WRTE16E1-125L-4X/6EG24K31/A1M比例方向阀供应型号

力士乐REXROTH三位四通高响应换向阀、先导式、电气位置反馈和集成电子放大版（OBE）4WRTE

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R901091326 4WRTE25W8-350L-4X/6EG24EK31/A5V

R901322335 4WRTE25W8-350L-4X/6EG24ETK31/A5M=LB

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R901116120 4WRTE35V1000P-4X/6EG24K31/A1M-280

R901294422 4WRTE35V1000P-4X=6EG24TK31/A1V-956

R901111512 4WRTE35W6-1000L-4X/6EG24EK31/F1M

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R901146839 4WRTE35W9-1000L-4X/6EG24K31/A1M

力士乐REXROTH高响应方向阀，先导，带集成电控装置（OBE）和电气位置反馈4WRDE -5X

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R900551052 4WRDE10E1-100P-5X/6L24Z9/MR

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R901065914 4WRDE10E100L-5X/6L24EK9/M-280

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R900566134 4WRDE10Q2-100P-5X/6L24ETZ9/WG021MR

R900572257 4WRDE10Q2-100P-5X/6L24ETZ9/WG151MR

R900517025 4WRDE10Q2-100P-5X/6L24Z9/M

R900519126 4WRDE10Q2-100P-5X/6L24Z9/WG021M

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R900512412 4WRDE10V1-100L-5X/6L24EZ9/MR

R900519413 4WRDE10V1-100L-5X/6L24TZ9/M

R900550274 4WRDE10V1-100P-5X/6L24Z9/V

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R900548005 4WRDE10V1-50L-5X/6L24TZ9/M-280

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R900516629 4WRDE10V100L-5X/6L24ETZ9/M

R900523829 4WRDE10V100L-5X/6L24ETZ9/M-509

R900552219 4WRDE10V100L-5X/6L24EZ9/M-509

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R900563522 4WRDE10V100P-5X/6L24Z9/M

R900526925 4WRDE10V100P-5X/6L24Z9/MR-478

R900527506 4WRDE10V100P-5X/6L24Z9/WG011MR

R900529590 4WRDE10V25L-5X/6L24ETZ9/M

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R900549429 4WRDE10W1-100P-5X/6L24Z9/M

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R900903982 4WRDE16E125L-5X/6L24Z9/WG071M

R900562530 4WRDE16E125P-5X/6L24ETZ9/M-280

R900549355 4WRDE16E125P-5X/6L24EZ9/M

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R900546309 4WRDE16E125P-5X/6L24Z9/WG021M

R900947764 4WRDE16E125S-5X/6L24K9/WX152M-643

R900533297 4WRDE16E200L-5X/6L24Z9/MR

R900547148 4WRDE16E200P-5X/6L24ETZ9/M-280

R900517198 4WRDE16E200P-5X/6L24ETZ9/MR

R900533922 4WRDE16E200P-5X/6L24ETZ9/MR-280

R900936057 4WRDE16E200P-5X/6L24K9/MR-636

R900522817 4WRDE16E200P-5X/6L24TZ9/MR-280

R900576574 4WRDE16E200P-5X/6L24TZ9/WG021MR

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力士乐REXROTH三位四通高响应换向阀，先导操作，具有电气位置反馈4WRD...XN

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力士乐REXROTH三位三通方向高响应阀，先导操作，电感位置传感器3WRCBH

二通插装阀与普通液压阀的功能相同，都是用来控制液压系统工作介质的压力、流量和流动方向的。二通插装阀由插入元件、先导元件、控制盖板和插装块体四部分组成。插入元件主要由阀芯、阀套、弹簧和密封件组成，图1为其示意图。控制盖板上,根据插装阀的不同控制功能，安装有相应的先导控制级元件，以实现对液压系统压力、流量和方向的控制,插装块体则既是嵌入插入元件及安装控制盖板的基础阀体，又是主油路和控制油路的通道体。