德国Rexroth电磁阀，REXROTH电磁阀，德国力士乐电磁阀

电磁阀在我们的生产中应用十分广泛，我们在对生产的维护中一定遇见过不少有关电磁阀的问题，也处理过各种各样的故障，大家也一定积累了不少有关电磁阀故障处理的经验，而我在维护中处理电磁阀故障相对别的仪控故障相对较少，现在我就这个问题一起和大家讨论，渴望从大家那里学习更多的经验，共同提高。
我们先对电磁阀有个初步的认识，电磁阀是由电磁线圈和磁芯组成，是包含一个或几个孔的阀体。当线圈通电或断电时，磁芯的运转将导致流体通过阀体或被切断，以达到改变流体方向的目的。电磁阀的电磁部件由固定铁芯、动铁芯、线圈等部件组成；阀体部分由滑阀芯、滑阀套、弹簧底座等组成。电磁线圈被直接安装在阀体上，阀体被封闭在密封管中，构成一个简洁、紧凑的组合。我们在生产中常用的电磁阀有二位三通、二位四通、二位五通等。这里先说说二位的含义：对于电磁阀来说就是带电和失电，对于所控制的阀门来说就是开和关。
我们制氧机仪控系统中，二位三通电磁阀用的最多，它在生产中可用来接通或切断气 源，从而对气动控制膜头气路进行切换。
德国Rexroth电磁阀，REXROTH电磁阀，德国力士乐电磁阀它由阀体、阀罩、电磁组件、弹簧及密封结构等部件组成，动铁芯底部的密封块借助弹簧的压力将阀体进气口关闭。通电后，电磁铁吸合，动铁芯上部带弹簧的密封块把排气口关闭，气流从进气口进入膜头，起到控制作用。当失电时，电磁力消失，动铁芯在弹簧力作用下离开固定铁芯，向下移动，将排气口打开，堵住进气口，膜头气流经排气口排出，膜片恢复原来位置。在我们的制氧设备中，在透平膨胀机进口薄膜调节阀的紧急切断等处有应用。
四通电磁阀在我们的生产中应用也很多，其工作原理如下：
当有电流通过线圈时，产生励磁作用，固定铁芯吸合动铁芯，动铁芯带动滑阀芯并压缩弹簧，改变了滑阀芯的位置，从而改变了流体的方向。当线圈失电时，依靠弹簧的弹力推动滑阀芯，顶回动铁芯，使流体按原来的方向流动。在我们制氧生产中，分子筛切换系统强制阀的开关就是通过二位四通电磁阀来控制的，气流分别供至强制阀的活塞两端。从而来控制强制阀的启闭。
电磁阀的故障将直接影响到切换阀和调节阀的动作，常见的故障有电磁阀不动作，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。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。

德国Rexroth电磁阀，REXROTH电磁阀，德国力士乐电磁阀

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