REXROTH比例阀4WREE6E32-2X/G24K31/A1V-655

REXROTH比例阀4WREE6E32-2X/G24K31/A1V-655，武汉百士自动化设备有限公司供应产品，现货库存，原厂原装，价格优惠；

液压比例控制系统
以比例控制元件完成动力与运动方向控制，分为比例压力阀、比例流量阀、比例方向阀及比例方向流量阀，可为模拟量输入或数字量输入，视是否带反馈分为开环控制与闭环控制，一般获得频率不是很高(10HZ)以内，高频响阀可实现较高频率。
若精度要求不高可考虑使用电液比例控制系统，一般电液比例控制系统可达至以下精度
位置精度- 3 mm
速度精度带压力补偿器- 3%
加减速斜坡时间-0.5秒
压力带位移传感器的产品-比例压力阀设定的0.3% (如压力设定为200bar,精度可达0.6bar)
一般的多驱动器液压系统皆要求流量及压力控制，提供比例压力及流量控制系统
开环式比例压力及流量控制可用于定量泵及变量泵系统。
速度和流量比例控制的分别是:
流量控制只控制供油量,并不控制驱动元件的运动方向;
若系统负载及变速要求高，则要使用速度控制系统。
速度比例控制多用于自动化控制、注塑机、压力机等
使用闭环的主要原因:
保持设定值不受外来干扰所影响
→在不同的工作压力下保持稳定的速度
→在不同的输出力下保证相同位置
→在带偏载的情况下作同步移动
提高精度要求
→位置误差低于1 mm
→压力误差低于1 ba
→需要控制加减速度
高动态要求的系统
→模拟应用
→测验应用


液压伺服控制系统
以伺服控制元件完成动力与运动方向控制，综合压力、流量、方向控制为一体，利用偏差控制进行纠偏，以满足精度控制需要，必须为闭环控制，可实现较高频率( 100HZ以上) ,有滑阀式、喷嘴挡板式、射流管式等，常采用机械伺服、电液伺服、气液伺服。

液压伺服系统分类:
(1)按输入的信号变化规律分类:定值控制系统、程序控制系统和伺服系统三类。当系统输入信号为定值时，称为定值控制系统，其基本任务是提高系统的抗干扰能力。当系统的输入信号按预先给定的规律变化时，称为程序控制系统。伺服系统也称为随动系统，其输入信号是时间的未知函数，输出量能够准确、迅速地复现输入量的变化规律。
(2)按输入信号的不同分类:机液伺服系统、电液伺服系统、气液伺服系统等。
(3)按输出的物理量分类:位置伺服系统、速度伺服系统、力(或压力)伺服系统等。
(4)按控制元件分类:阀控系统和泵控系统。在机械设备中，阀控系统应用较多。
REXROTH比例阀4WREE6E32-2X/G24K31/A1V-655
R900907114 4WREE6E32-2X/G24K31/A1V
R900907114 4WREE6E32-23/G24K31/A1V
R901220128 4WREE6E32-2X/G24K31/A1V-204=XV
R900974914 4WREE6E32-2X/G24K31/A1V-280
R900975521 4WREE6E32-2X/G24K31/A1V=LB
R901354736 4WREE6E32-2X/G24K31/F1M
R900925733 4WREE6E32-2X/G24K31/F1V
R900965748 4WREE6E32-2X/G24N9K31/A1V
R901349814 4WREE6EA04-2X/G24K31/A1V
R900950317 4WREE6EA08-2X/G24K31/A1V
R900937147 4WREE6EA08-2X/G24K31/F1V
R900913433 4WREE6EA16-2X/G24K31/A1V
R900973289 4WREE6EA16-2X/G24K31/F1V
R900912521 4WREE6EA32-2X/G24K31/A1V
R900969497 4WREE6EA32-2X/G24K31/A1V=DE
R900929889 4WREE6EA32-2X/G24K31/F1V
R901032102 4WREE6EB04-2X/G24K31/F1V
R901073284 4WREE6EB08-2X/G24K31/A1V
R901063172 4WREE6EB08-2X/G24K31/F1V
R900776804 4WREE6EB16-2X/G24K31/A1V
R900932498 4WREE6EB32-2X/G24K31/A1V
R900964078 4WREE6EB32-2X/G24K31/F1V
R900930422 4WREE6M32-2X/G24K31/F1V
R900912149 4WREE6Q2-08-2X/G24K31/A1V
R901250869 4WREE6Q2-08-2X/G24K31/F1V
R900912150 4WREE6Q2-16-2X/G24K31/A1V
R900912154 4WREE6Q2-32-2X/G24K31/A1V
R901287575 4WREE6Q2-32-2X/G24K31/F1V
R901192082 4WREE6Q5-08-2X/G24K31/A1V
R901116919 4WREE6Q5-32-2X/G24K31/A1V=DE
R900936357 4WREE6V04-2X/G24K31/A1V
R900976331 4WREE6V04-2X/G24K31/F1V
R900909367 4WREE6V08-2X/G24K31/A1V
R987243693 4WREE6V08-2X/G24K31/A1V-826+3.1K
R901354737 4WREE6V08-2X/G24K31/F1M
R900921427 4WREE6V08-2X/G24K31/F1V
R987128194 4WREE6V08-2X/G24K31/F1V-876+3.1K
R900935426 4WREE6V1-08-2X/G24K31/A1V
R901393960 4WREE6V1-08-2X/G24K31/F1M
R900949863 4WREE6V1-08-2X/G24K31/F1V
R900931195 4WREE6V1-16-2X/G24K31/A1V
R901393939 4WREE6V1-16-2X/G24K31/F1M
R900949899 4WREE6V1-16-2X/G24K31/F1V
R900914841 4WREE6V1-32-2X/G24K31/A1V
R901414450 4WREE6V1-32-2X/G24K31/F1M
R900709937 4WREE6V1-32-2X/G24K31/F1V
R900907440 4WREE6V16-2X/G24K31/A1V
R987243694 4WREE6V16-2X/G24K31/A1V-826+3.1K
R900940561 4WREE6V16-2X/G24K31/F1V
R987280483 4WREE6V16-2X/G24K31/F1V-876+3.1K
R901176334 4WREE6V16-2X=G24K31/A1V
R900911681 4WREE6V32-2X/G24K31/A1V
R901007746 4WREE6V32-2X/G24K31/A1V-280
R987243695 4WREE6V32-2X/G24K31/A1V-826+3.1K
R901284535 4WREE6V32-2X/G24K31/A1V-968
R901354740 4WREE6V32-2X/G24K31/F1M
R900926747 4WREE6V32-2X/G24K31/F1V
R987247179 4WREE6V32-2X/G24K31/F1V-876+3.1K
R901267680 4WREE6V32-2X=G24K31/A1V-280
R900246469 4WREE6W04-2X/G24K31/A1V
R900967564 4WREE6W04-2X/G24K31/F1V
R900923000 4WREE6W08-2X/G24K31/A1V
R901278020 4WREE6W08-2X/G24K31/A1V-280
R901354748 4WREE6W08-2X/G24K31/F1M
R900924283 4WREE6W08-2X/G24K31/F1V
R900929827 4WREE6W1-08-2X/G24K31/A1V
R901003235 4WREE6W1-08-2X/G24K31/A1V-280
R901354749 4WREE6W1-08-2X/G24K31/F1M
R900965071 4WREE6W1-08-2X/G24K31/F1V
R901394157 4WREE6W1-16-2X/G24K31/A1M
R900939627 4WREE6W1-16-2X/G24K31/A1V
R901154928 4WREE6W1-16-2X/G24K31/A1V-280
R901421940 4WREE6W1-16-2X/G24K31/F1M
R900937065 4WREE6W1-16-2X/G24K31/F1V
R901368371 4WREE6W1-32-2X/G24K31/A1M
R900913359 4WREE6W1-32-2X/G24K31/A1V
R901362947 4WREE6W1-32-2X/G24K31/A1V-660
R901354752 4WREE6W1-32-2X/G24K31/F1M
R900933476 4WREE6W1-32-2X/G24K31/F1V
R900925657 4WREE6W16-2X/G24K31/A1V
R901048039 4WREE6W16-2X/G24K31/A1V=LB
R901362073 4WREE6W16-2X/G24K31/F1M
R900950416 4WREE6W16-2X/G24K31/F1V
R900929205 4WREE6W2-32-2X/G24K31/A1V
R900911004 4WREE6W32-2X/G24K31/A1V
R900911004 4WREE6W32-23/G24K31/A1V
R978902911 4WREE6W32-2X/G24K31/A1VSO43A-1539
R900969483 4WREE6W32-2X/G24K31/A1V=DE
R900938299 4WREE6W32-2X/G24K31/A1V=LB
R901438225 4WREE6W32-2X/G24K31/A1V=PL
R901354753 4WREE6W32-2X/G24K31/F1M
R900246793 4WREE6W32-2X/G24K31/F1V
R901355277 4WREE6W32-2X=G24K31/A1V
R900761481 4WREE6W9-16-2X/G24K31/A1V
R900783449 4WREE6W9-32-2X/G24K31/A1V
R901185980 4WREE6WA04-2X/G24K31/F1V
R900973482 4WREE6WA08-2X/G24K31/A1V
R901180378 4WREE6WA08-2X/G24K31/F1V
R900974247 4WREE6WA16-2X/G24K31/A1V
R900617766 4WREE6WA16-2X/G24K31/F1V
R900926997 4WREE6WA32-2X/G24K31/A1V
R900964934 4WREE6WA32-2X/G24K31/F1V
R900780141 4WREE6WB32-2X/G24K31/A1V
R978907329 4WREE10E50-2X/G24K31/A1VSO43A-1595
R978900573 4WREE10V75-2X/G24K31/A1VSO43A-1505
R987373453 4WREE10V75-2X/G24K31/A1V-S047-906
R978902912 4WREE10W75-2X/G24K31/A1VSO43A-1547
R978919605 4WREE10W75-2X/G24K31/A1VSO43A-1733
R978014651 4WREE6V08-2X/G24K31/F1VSO43A-1485
R978008628 4WREE6V08-2X/G24K31/F1VSO43A-1639
R978915950 4WREE6V16-2X/G24K31/A1VSO43A-1639
R978917001 4WREE6V16-2X/G24K31/F1VSO43A-1639
R978899985 4WREE6V32-2X/G24K31/A1VSO43A-1485
R978912989 4WREE6V32-2X/G24K31/F1VSO43A-1639
力士乐REXROTH二位四通和三位四通比例方向阀直控式，阀芯带位移电反馈，带集成式放大版（OBE）4WREE
R900958157 4WREE10E1-25-24/G24K31/A1V
R901268119 4WREE10E1-25-24/G24K31/A1V-280
R901066667 4WREE10E1-25-24/G24K31/F1V
R900933076 4WREE10E1-50-24/G24K31/A1V
R901162016 4WREE10E1-50-24/G24K31/A1V-280
R901354776 4WREE10E1-50-24/G24K31/F1M
R900703908 4WREE10E1-50-24/G24K31/F1V
R901381875 4WREE10E1-75-24/G24K31/A1M
R900927232 4WREE10E1-75-24/G24K31/A1V
R901268118 4WREE10E1-75-24/G24K31/A1V-280
R901354778 4WREE10E1-75-24/G24K31/F1M
R900970089 4WREE10E1-75-24/G24K31/F1V
R900933073 4WREE10E25-24/G24K31/A1V
R901112728 4WREE10E25-24/G24K31/A1V-280
R900956574 4WREE10E25-24/G24K31/F1V
R900949382 4WREE10E3-50-24/G24K31/A1V
R901363566 4WREE10E3-50-24/G24K31/F1V
R900972424 4WREE10E3-75-24/G24K31/A1V
R901048034 4WREE10E3-75-24/G24K31/F1V
R900927231 4WREE10E50-24/G24K31/A1V
R901126284 4WREE10E50-24/G24K31/A1V-280
R901219466 4WREE10E50-24/G24K31/A1V=XV
R901354780 4WREE10E50-24/G24K31/F1M
R900943094 4WREE10E50-24/G24K31/F1V
R987098779 4WREE10E50-24/G24K31/F1V=CSA
R901356207 4WREE10E75-24/G24K31/A1M
R900927230 4WREE10E75-24/G24K31/A1V
R900716433 4WREE10E75-24/G24K31/A1V-280
R901219782 4WREE10E75-24/G24K31/A1V=XV
R901354781 4WREE10E75-24/G24K31/F1M
R900927356 4WREE10E75-24/G24K31/F1V
R901395952 4WREE10E75-24=G24K31/A1V
R900967790 4WREE10EA25-24/G24K31/A1V
R900767561 4WREE10EA25-24/G24K31/F1V
R900939866 4WREE10EA50-24/G24K31/A1V
R900971420 4WREE10EA50-24/G24K31/F1V
R900940191 4WREE10EA75-24/G24K31/A1V
R900976330 4WREE10EA75-24/G24K31/F1V
R900710343 4WREE10EB50-24/G24K31/A1V
R900950497 4WREE10EB75-24/G24K31/A1V
R900724343 4WREE10EB75-24/G24K31/F1V
R900927237 4WREE10Q2-50-24/G24K31/A1V
R900927236 4WREE10Q2-75-24/G24K31/A1V
R901066046 4WREE10Q5-50-24/G24K31/A1V
R901113345 4WREE10Q5-50-24/G24K31/A1V=DE
R901028415 4WREE10R3-75-24/G24K31/A1V
R901341484 4WREE10R3-75-24/G24K31/F1V
R901037424 4WREE10R75-24/G24K31/A1V
R900724591 4WREE10R75-24/G24K31/F1V
R901007660 4WREE10R75-24/G24K31/F1V-741
R900950365 4WREE10V1-25-24/G24K31/A1V
R900976334 4WREE10V1-25-24/G24K31/F1V
R900943804 4WREE10V1-50-24/G24K31/A1V
R900972643 4WREE10V1-50-24/G24K31/F1V
R901233907 4WREE10V1-50-24/G24K31/F1V-876
R901412403 4WREE10V1-75-24/G24K31/A1M
R900950902 4WREE10V1-75-24/G24K31/A1V
R901400160 4WREE10V1-75-24/G24K31/F1M
R901024870 4WREE10V1-75-24/G24K31/F1V
R900933075 4WREE10V25-24/G24K31/A1V
R900779950 4WREE10V25-24/G24K31/F1V
R900927235 4WREE10V50-24/G24K31/A1V
R987243696 4WREE10V50-24/G24K31/A1V-826+3.1K
R901354782 4WREE10V50-24/G24K31/F1M
R900924975 4WREE10V50-24/G24K31/F1V
R900924607 4WREE10V75-24/G24K31/A1V
R987243698 4WREE10V75-24/G24K31/A1V-826+3.1K
R901354783 4WREE10V75-24/G24K31/F1M
R900617269 4WREE10V75-24/G24K31/F1V
R900956458 4WREE10W1-25-24/G24K31/A1V
R900962405 4WREE10W1-25-24/G24K31/F1V
R900933077 4WREE10W1-50-24/G24K31/A1V
R901154931 4WREE10W1-50-24/G24K31/A1V-280
R901354784 4WREE10W1-50-24/G24K31/F1M
R900965185 4WREE10W1-50-24/G24K31/F1V
R901371014 4WREE10W1-75-24/G24K31/A1M
R900927234 4WREE10W1-75-24/G24K31/A1V
R901154933 4WREE10W1-75-24/G24K31/A1V-280
R901354786 4WREE10W1-75-24/G24K31/F1M
R900976119 4WREE10W1-75-24/G24K31/F1V
R901185591 4WREE10W2-75-24/G24K31/A1V
R901377557 4WREE10W25-24/G24K31/A1M
R900933074 4WREE10W25-24/G24K31/A1V
R901127151 4WREE10W25-24/G24K31/A1V-280
R900953102 4WREE10W25-24/G24K31/F1V
R900935771 4WREE10W3-25-24/G24K31/A1V
R900931319 4WREE10W3-50-24/G24K31/A1V
R900969321 4WREE10W3-75-24/G24K31/A1V
R900244748 4WREE10W3-75-24/G24K31/F1V
R900931371 4WREE10W50-24/G24K31/A1V
R900974227 4WREE10W50-24/G24K31/A1V-280
R901354788 4WREE10W50-24/G24K31/F1M
R900949806 4WREE10W50-24/G24K31/F1V
R900927233 4WREE10W75-24/G24K31/A1V
R901135118 4WREE10W75-24/G24K31/A1V-280
R900969501 4WREE10W75-24/G24K31/A1V=DE
R900741017 4WREE10W75-24/G24K31/A1V=LB
R901354791 4WREE10W75-24/G24K31/F1M
R900948360 4WREE10W75-24/G24K31/F1V
R901430295 4WREE10WA25-24/G24K31/A1V
R901060996 4WREE10WA25-24/G24K31/F1V
R900247296 4WREE10WA50-24/G24K31/A1V
R901063131 4WREE10WA50-24/G24K31/F1V
R901002587 4WREE10WA75-24/G24K31/A1V
R900963483 4WREE10WA75-24/G24K31/F1V
R901097145 4WREE10WB50-24/G24K31/A1V
R900960911 4WREE10WB50-24/G24K31/F1V
R900960910 4WREE10WB50-24/G24K31/F1V
R901268120 4WREE10WB75-24/G24K31/A1V
R901244712 4WREE10XA00-24/G24K31/A1V-953
R900938420 4WREE6E04-24/G24K31/A1V
R900978168 4WREE6E04-24/G24K31/F1V
R900912156 4WREE6E08-24/G24K31/A1V
R900974228 4WREE6E08-24/G24K31/A1V-280
R901354730 4WREE6E08-24/G24K31/F1M
R900928726 4WREE6E08-24/G24K31/F1V
R901394155 4WREE6E1-08-24/G24K31/A1M
R900933794 4WREE6E1-08-24/G24K31/A1V
R901354733 4WREE6E1-08-24/G24K31/F1M
R900976811 4WREE6E1-08-24/G24K31/F1V
R901394310 4WREE6E1-16-24/G24K31/A1M
R900915686 4WREE6E1-16-24/G24K31/A1V
R901155084 4WREE6E1-16-24/G24K31/A1V-280
R900617482 4WREE6E1-16-24/G24K31/F1V
R901368370 4WREE6E1-32-24/G24K31/A1M
R900928553 4WREE6E1-32-24/G24K31/A1V
R901154930 4WREE6E1-32-24/G24K31/A1V-280
R901354735 4WREE6E1-32-24/G24K31/F1M
R900949222 4WREE6E1-32-24/G24K31/F1V
R901371016 4WREE6E16-24/G24K31/A1M
R900920567 4WREE6E16-24/G24K31/A1V
R900974920 4WREE6E16-24/G24K31/A1V-280
R900774364 4WREE6E16-24/G24K31/A1V=LB
R900941623 4WREE6E16-24/G24K31/F1V
R901312781 4WREE6E3-16-24/G24K31/A1V
R900706670 4WREE6E3-32-24/G24K31/A1V
R900957273 4WREE6E3-32-24/G24K31/F1V
R900907114 4WREE6E32-24/G24K31/A1V
R901220128 4WREE6E32-24/G24K31/A1V-204=XV
R900974914 4WREE6E32-24/G24K31/A1V-280
R900975521 4WREE6E32-24/G24K31/A1V=LB
R901354736 4WREE6E32-24/G24K31/F1M
R900925733 4WREE6E32-24/G24K31/F1V
R900965748 4WREE6E32-24/G24N9K31/A1V
R901349814 4WREE6EA04-24/G24K31/A1V
R900950317 4WREE6EA08-24/G24K31/A1V
R900937147 4WREE6EA08-24/G24K31/F1V
R900913433 4WREE6EA16-24/G24K31/A1V
R900973289 4WREE6EA16-24/G24K31/F1V
R900912521 4WREE6EA32-24/G24K31/A1V
R900969497 4WREE6EA32-24/G24K31/A1V=DE
R900929889 4WREE6EA32-24/G24K31/F1V
R901032102 4WREE6EB04-24/G24K31/F1V
R901073284 4WREE6EB08-24/G24K31/A1V
R901063172 4WREE6EB08-24/G24K31/F1V
R900776804 4WREE6EB16-24/G24K31/A1V
R900932498 4WREE6EB32-24/G24K31/A1V
R900964078 4WREE6EB32-24/G24K31/F1V
R900930422 4WREE6M32-24/G24K31/F1V
R900912149 4WREE6Q2-08-24/G24K31/A1V
R901250869 4WREE6Q2-08-24/G24K31/F1V
R900912150 4WREE6Q2-16-24/G24K31/A1V
R900912154 4WREE6Q2-32-24/G24K31/A1V
R901287575 4WREE6Q2-32-24/G24K31/F1V
R901192082 4WREE6Q5-08-24/G24K31/A1V
R901116919 4WREE6Q5-32-24/G24K31/A1V=DE
R900936357 4WREE6V04-24/G24K31/A1V
R900976331 4WREE6V04-24/G24K31/F1V
R900909367 4WREE6V08-24/G24K31/A1V
R987243693 4WREE6V08-24/G24K31/A1V-826+3.1K
R901354737 4WREE6V08-24/G24K31/F1M
R900921427 4WREE6V08-24/G24K31/F1V
R987128194 4WREE6V08-24/G24K31/F1V-876+3.1K
R900935426 4WREE6V1-08-24/G24K31/A1V
R901393960 4WREE6V1-08-24/G24K31/F1M
R900949863 4WREE6V1-08-24/G24K31/F1V
R900931195 4WREE6V1-16-24/G24K31/A1V
R901393939 4WREE6V1-16-24/G24K31/F1M
R900949899 4WREE6V1-16-24/G24K31/F1V
R900914841 4WREE6V1-32-24/G24K31/A1V
R901414450 4WREE6V1-32-24/G24K31/F1M
R900709937 4WREE6V1-32-24/G24K31/F1V
R900907440 4WREE6V16-24/G24K31/A1V
R987243694 4WREE6V16-24/G24K31/A1V-826+3.1K
R900940561 4WREE6V16-24/G24K31/F1V
R987280483 4WREE6V16-24/G24K31/F1V-876+3.1K
R901176334 4WREE6V16-2X=G24K31/A1V
R900911681 4WREE6V32-24/G24K31/A1V
R901007746 4WREE6V32-24/G24K31/A1V-280
R987243695 4WREE6V32-24/G24K31/A1V-826+3.1K
R901284535 4WREE6V32-24/G24K31/A1V-968
R901354740 4WREE6V32-24/G24K31/F1M
R900926747 4WREE6V32-24/G24K31/F1V
R987247179 4WREE6V32-24/G24K31/F1V-876+3.1K
R901267680 4WREE6V32-24=G24K31/A1V-280
R900246469 4WREE6W04-24/G24K31/A1V
R900967564 4WREE6W04-24/G24K31/F1V
R900923000 4WREE6W08-24/G24K31/A1V
R901278020 4WREE6W08-24/G24K31/A1V-280
R901354748 4WREE6W08-24/G24K31/F1M
R900924283 4WREE6W08-24/G24K31/F1V
R900929827 4WREE6W1-08-24/G24K31/A1V
R901003235 4WREE6W1-08-24/G24K31/A1V-280
R901354749 4WREE6W1-08-24/G24K31/F1M
R900965071 4WREE6W1-08-24/G24K31/F1V
R901394157 4WREE6W1-16-24/G24K31/A1M
R900939627 4WREE6W1-16-24/G24K31/A1V
R901154928 4WREE6W1-16-24/G24K31/A1V-280
R901421940 4WREE6W1-16-24/G24K31/F1M
R900937065 4WREE6W1-16-24/G24K31/F1V
电液比例阀是比例控制系统中的主要功率放大元件,按输入电信号指令连续地成比例地控制液压系统的压办流量等参数。与伺服控制系统中的伺服阀相比,在某些方面还有一定的性能差距(主要性能比较如表1所示),但它显着的优点是抗污染能力强,大大地减少了由污染而造成的工作故障,提高了液压系统的工作稳定性和可靠性。另一方面比例阀的成本比伺服阀低，结构也简单,已在许多场合获得广泛应用。

比例阀按功能分为三大类
(1)比例压力阀。有溢流阀减压阀,分别有直动和先导两种结构;可连续地或按比例地远程控制其输出油液压力;
(2)比例换向阀。有直动和先导两种结构,直动阀有带位移传感器和不带位移传感器两类。由于使用了比例电磁铁阀芯不仅可以换位，而且换位的行程可以连续地或按比例地变化。因而连通油口间的通流面积也可以连续或按比例地变化。所以比例换向阀不仅能够控制执行元件的方向而且能够控制其速度。因为这个原因比例阀中的比例换向阀应用也普遍;
(3)比例流量阀。有比例调速阀和比例溢流流量控制阀,可连续地或按比例地远程控制其输出流量。
比例阀的输入单元是电-机械转换器,它将输入的电信号转换成机械量转换器有伺服电机和步进电机力马达和力矩马达比例电磁铁等形式。但常用的比例阀大都采用了比例电磁铁，比例电磁铁根据电磁原理设计,能使其产生的机械量(力或力矩和位移)与输入电信号(电流)的大小成比例,再连续地控制液压阀阀芯的位置，进而实现连续地控制液压系统的压力方向和流量。比例电磁铁的结构，它由线圈、衔铁推杆等组成,当有信号输入线圈时,线圈内磁场对衔铁产生作用力,衔铁在磁场中按信号电流的大小和方向成比例连续地运动,再通过固连在一起的销钉带动推杆运动,从而控制滑阀阀芯的运动。应用的比例电磁铁是耐高压直流比例电磁铁。

比例电磁铁的类型按照工作原理主要分为
如下几类:
(1)力控制型
这类电磁铁的行程短，只有1 5mm,输出力与输入电流成正比,常用在比例阀的先导控制级
上:
(2)行程控制型
由力控制型加负载弹簧共同组成，电磁铁输出的力通过弹簧转换成输出位移,输出位移与输入电流成正比，工作行程达3mm,线性好，可以用在直控式比例阀上;
(3)位置调节型
衔铁的位置由传感器检测后,发出一个阀内反馈信号,在阀内进行比较后重新调节衔铁的位置。阀内形成闭环控制,精度高,衔铁的位置与力
无关，精度高的比例阀如德国的博世意大利的阿托斯等都采用这种结构。
比例阀与放大器配套使用放大器采用电流负反馈,设置斜坡信号发生器阶跃函数发生器、PD调节器反向器等,控制升压降压时间或运动加速度及减速度。断电时, 能使阀芯处于安全位置。
比例电磁铁和液压阀组成电液比例阀。由于比例电磁铁可以在不同的电流下得到不同的力(或行程),因此可以无级改变压力、流量。故比例电磁铁是比例阀的关键元件。