施工机械的电器设备多用交流接触器,而小型交流接触器只是其中的一种。它构造简单,使用面广,动作频繁。少数小型交流接触器断电后延时释放,不仅浪费电能,还会导致事故的发生。现将其产生原因和故障处理法分析介绍如下。一,接触器铁芯截面上浮有粘性的油垢,断电后可能会出现延时释放或不释放。因油垢粘住不释放,断电后受振动或时间稍长才可能释放。新安装启用的接触器,因油垢粘接而引起上述现象时,应将铁芯截面上积存的油垢,用硬布浸汽油或无水酒精清洗即可。二、因机械故障而引起的断电后不释放的原因有:胶木支架尺寸不合格,造成动作后不释放;支架上的销钉和孔洞配合不当,使销钉受振后复不了位,而将支架卡住;弹簧力小或断开,使支架复不了位;螺钉或其它物件落下卡住,也会出现铁芯不释放现象。解决以上情况的办法是:更换 Electrical equipment for construction machinery uses AC contactors, and small AC contactors are just one of them. It has a simple structure, a wide range of uses, and frequent actions. The delayed release of a small number of small AC contactors after a power failure will not only waste electricity but also cause accidents. The reason for its occurrence and the troubleshooting method are described below. First, there is sticky grease on the cross section of the contactor core. Delayed release or no release may occur after power off. Due to grease sticking does not release, after power off by vibration or a little longer time may be released. When the contactor is newly installed and the above phenomenon is caused by the adhesion of grease, the grease accumulated on the cross section of the iron core should be cleaned with a hard cloth soaked in gasoline or anhydrous alcohol. Second, due to mechanical failure caused by the power does not release after the reasons are: bakelite bracket size is not qualified, resulting in the release of the action does not; the pin and hole in the bracket with improper, so that the pin will not be able to recover after the bit, and the bracket card Live; spring force is small or disconnected, so that the bracket can not reposition; screw or other objects fall stuck, there will be no core release phenomenon. The solution to the above situation is: replacement