REXROTH二位四通换向阀4WE6W6X/EG24N9K4

现场快速判断电磁阀好坏方法

　　一、首先检查是不是电磁阀电磁线圈故障？

　　在DCS上给二位阀给开或者关的信号，然后看电磁阀是否得失电，一般在现场听声音即可。

　　若听不到，那线圈肯定是有问题，至于电磁阀本身是不是有问题？（下面解释）

　　如果电磁线圈问题，首先检查接线，看是不是有虚接，或者有短路现象，如果线路上没问题就是电磁阀线圈烧坏，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，引起绝缘不好而漏磁，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。

　　二、若线圈是好的，那就是电磁阀本身的问题。

　　一般可以在手动调节处用一字起由1调到0位置，使阀打开，若是能打开就说明的确是线圈的问题，换个线圈就可以了，若打不开，就拆电磁阀，看是不是阀芯卡住，或者是有杂粒堵，清洗正确应该用CCL4，但是考虑到现场没有条件的话，可以用汽油，实在没有用水也可以，清洗后可以用现场仪表气进行吹干，拆时务必记好各部件的顺序，不注意的话，装的时候很容易出错，顺序记错就算你清洗好电磁阀，即使电磁阀已经通了也还是打不开的！

电磁阀（Electromagnetic valve）是用电磁控制的工业设备,是用来控制流体的自动化基础元件,属于执行器,并不限于液压,气动。用在工业控制系统中调整介质的方向,流量,速度和其他的参数。电磁阀可以配合不同的电路来实现预期的控制,而控制的精度和灵活性都能够保证。电磁阀有很多种,不同的电磁阀在控制系统的不同位置发挥作用,最常用的是单向阀,安全阀,方向控制阀,速度调节阀等。

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