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ZDB6VB1-4X/315力士乐电磁溢流阀
溢流阀的性能指标
（1）溢流阀静态调压偏差 阀的调定压力与开启压力之差称为静态调压偏差。溢流流量对系统压力的影响一般在2~4kgf/cm2左右。调压偏差越大，系统的压力波动也越大。
（2）溢流阀压力振摆它是溢流阀在系统*大额定流量和*大压力下工作时，所控制的压力变动。一般应在±1~±3kgf/cm2左右。
（3）溢流阀卸载压力当系统的全部流量从溢流阀卸荷时，阀的压力损失为卸载压力，卸载压力越小越好。
（4）溢流阀动态指标溢流阀调整好以后，从开始工作到稳定工作一段的很短的过渡时间内，被控制的油压*先以衰减振荡的形式围绕所调定的工作压力值上下波动，然后才变为稳压溢流状态，当工作机构受冲击载荷而系统压力突然升高时，会出现压力峰值。峰值压力与调定压力的差值称为压力超调量。超调量与调定压力之比称为超调值。超调值越小越好，高压溢流阀超调值一般小于20%，中、低压溢流阀一般小于50%，另外，它的振摆次数和过渡过程时间也愈小愈好。
功用：正向流通，反向受控流通
结构：普通单向阀+液控装置
工作原理：K不通压力油，工作方式同普通单向阀；K通压力油，阀口打开，可以反向流通
应用：∵液控单向阀具有良好的反密封性
常用于保压、锁紧和平衡回路
图形符号含义：
1、 位——用方格表示，几位即几个方格
2 、通——┴ 、┬ 箭头*尾和堵截符号与一个方格有几个交点即为几通。
3 、油口有固定方位和含义，p——进油口(左下）， T——回油口（右下） ，A.B——与执行元件连接的工作油口（左、右上）。
4 、弹簧——W、M，画在方格两侧
5 、常态位置 ——原理图中，油路应该连接在常态位置。如三位阀在中间一格。
滑阀的中位机能：即滑阀处于常态时的状态，有M型，H型，O型，P型，M型等。
溢流阀是压力控制阀。其作用主要是控制系统压力，以保护油泵和油路系统的安全及保持油路系统的压力恒定。通经为8毫米的溢流阀是一个小型的直接动作的溢流阀，可以和主溢流阀的遥控口连接，对主溢流阀实现远程压力调节。溢流阀的遥控口经换向阀和油箱连接时，可使油路卸荷。此时溢流阀起卸荷作用。溢流阀的遥控口串联换向阀和通经为8毫米的溢流阀时，可实现压力的多级控制。更换溢流阀的调节弹簧，可改变其压力调节范围。手轮顺时针转动时，压力升高。
电磁阀的线圈是指电感器。是指导线一根一根绕起来，导线彼此互相*缘，而*缘管可以是空心的，也可以包含铁芯或磁粉芯，简称电感。电感又可分为固定电感和可变电感，固定电感线圈是由导线一圈靠一圈地绕在*缘管上，导线彼此互相*缘，而*缘管可以是空心的，也可以包含铁芯或磁粉芯，简称电感或线圈。用L表示，单位有亨利(H)、毫亨利(mH)、微亨利(uH)，1H=10^3mH=10^6uH。
电磁阀的故障应从以下几方面排查：
1、电磁阀接线头松动或线头脱落，电磁阀不得电，可紧固线头。
2、电磁阀线圈烧坏，可拆下电磁阀的接线，用万用表测量，如果开路，则电磁阀线圈烧坏。原因有线圈受潮，引起*缘不好而漏磁，造成线圈内电流过大而烧毁，因此要防止雨水进入电磁阀。此外，弹簧过硬，反作用力过大，线圈匝数太少，吸力不够也可使得线圈烧毁。紧急处理时，可将线圈上的手动按钮由正常工作时的“0”位打到“1”位，使得阀打开。
3、电磁阀卡住：电磁阀的滑阀套与阀芯的配合间隙很小（小于0.008mm），一般都是单件装配，当有机械(http://www.maoyihang.com/sell/l_4/)杂质带入或润滑油太少时，很容易卡住。处理方法可用钢丝从头部小孔捅入，使其弹回。根本的解决方法是要将电磁阀拆下，取出阀芯及阀芯套，用CCI4清洗，使得阀芯在阀套内动作灵活。拆卸时应注意各部件的装配顺序及外部接线位置，以便重新装配及接线正确，还要检查油雾器喷油孔是否堵塞，润滑油是否足够。
4、漏气：漏气会造成空气压力不足，使得强制阀的启闭困难，原因是密封垫片损坏或滑阀磨损而造成几个空腔窜气。在处理切换系统的电磁阀故障时，应选择适当的时机，等该电磁阀处于失电时进行处理，若在一个切换间隙内处理不完，可将切换系统暂停，从容处理。
电磁溢流阀型号
型号 ZDB 和 Z2DB
叠加式溢流阀，先导式
规格6和10
安装面按DIN 24340 A 型和ISO 4401
4个压力等级：50，100，200，315
5个溢流功能：
4个可选的调整方式
旋钮
带护罩的六角套筒螺钉
带锁有刻度旋钮
有刻度旋钮
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力士乐REXROTH先导式溢流阀ZDB 10, Z2DB 10
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R900969830 ZDB10VA2-4X/50MIL15
R900751018 ZDB10VA2-4X/50P10V
