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德国REXROTH力士乐电磁阀/换向阀3WE6A6X/EG24N9K4德国力士乐原装供应
力士乐电液换向阀的结构及工作原理
德国Rexroth电液换向阀是电磁换向阀和液控换向阀的组合，它是用电磁换向阀控制液控换向阀的动作，变换流体流动方向的控制阀。力士乐电液换向阀和液控换向阀主要用在流量超过电磁换向阀正常工作允许范围的液压系统中，对执行元件的动作进行控制，或对油液的流动方向进行控制。
Rexroth螺纹插装结构的二位二通电液换向阀的工作原理示意图［1］。该阀由先导阀和主阀两部分组成。先导阀由先导阀芯1、前弹簧2、衔铁4、后弹簧5、电磁线圈等组成；主阀由主阀芯3、阀壳体6、阀套7,组成。先导阀芯和主阀均采用锥阀式结构，与液压阀座采用线接触，故密封性好，泄漏少，动作迅速。先导阀芯与衔铁采用T型槽连接。主阀芯3的外表面上加工了3条均压槽，以避免主阀芯3在运动过程中，承受不平衡的径向力而产生的液压卡紧现象。阀壳体6与阀套7，阀壳体6与阀体均采用螺纹联接。电液换向阀的各处采用0形密封圈密封。先导阀采用12V直流湿式电磁铁驱动，因为在相同条件下，由于湿式电磁阀比干式电磁阀具有较小的静、动摩擦力，结构尺寸相对较小，可消除阀体与电磁铁间的密封，并且使用寿命长，工作可靠性高。
力士乐电液换向阀的工作原理为：当电磁线圈断电时，由于先导式溢流阀芯后弹簧5的刚度远远大于前弹簧2的刚度，因此在弹簧力的作用下，先导阀芯1封闭。此时，进口高压油P1，一方面经过主阀口流向出口P2，另一方面经节流口d6流向主阀芯左腔，从而保证主阀芯左右两腔的液压力基本平衡，使主阀芯在弹簧力和液压力的作用下可靠地关闭。当电磁线圈通电时，先导阀芯1在电磁力作用下左移，主阀芯3的上腔的油液通过小孔d4与出口相通，由于节流小孔直径d6远远小于主阀芯上小孔d4的直径，因此主阀芯左右腔的液压力相同。由于主阀芯采用差动式结构，故在液体压力作用下左移，从而实现换向功能。
力士乐电液换向阀的注意事项：产品可任意安装，优先考虑水平位置。液压系统所用介质必须过滤，过滤精度至少20μm。固定螺钉请按样本中所列参数选用。
德国REXROTH力士乐电磁阀/换向阀3WE6A6X/EG24N9K4德国力士乐原装供应
A4VG125HDM1/32R-NSF02F691S-S
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A10K1X/315 用 DBDS10K1X/315
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德国REXROTH力士乐电磁阀/换向阀3WE6A6X/EG24N9K4德国力士乐原装供应
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