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R9002486404WRZE10EA85-70/6EG24EK31/A1D3M比例阀是一种新型的液压控制装置。在普通压力阀、流量阀和方向阀上，用比例电磁铁替代原有的控制部分，按输入的电气信号连续地、按比例地对油流的压力、流量或方向进行远距离控制。比例阀一般都具有压力补偿性能，输出压力和流量可以不受负载变化的影响 。
按比例阀控制方式分类是指按照比例阀的先导控制阀中的电气一机械转换方式来分类，其电控制部分有比例电磁铁、力矩马达、直流伺服电动机等多种形式。
（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。
比例控制阀是一种按输入的电信号连 续、按比例地控制液压系统的流量、压力和 方向的控制阀，其输出的流量和压力可以不受负载变化的影响。
比例阀与普通液压元件相比，有如下特点：
（1）电信号便于传递，能简单地实现远 距离控制。
（2）能连续、按比例地控制液压系统的 压力和流量，实现对执行机构的位置、速 度、力量的控制，并能减少压力变换时的冲 击。
（3）减少了元件数量，简化了油路。
同时电液比例阀的使用条件和保养与一 般液压元件相同，比伺服阀的抗污染性能 强，工作可靠。

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DBE6/DBEE6/ZDBE6/ZDBEE6 叠加/直动式比例溢流阀

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