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Maintenance And Repair Of Armature Cores In Generators

Jun. 23, 2022

The armature iron core of the generator set is made of laminated silicon steel sheets, and the silicon steel sheets are insulated from each other and pressed with iron pressure rings or fixed on the base or shaft with ring keys.


Common iron core faults are: short circuit between steel sheets (caused by insulation damage between steel sheets), loose iron core (caused by poor tightening and motor vibration), improper operation when removing the old coil makes the silicon steel sheet open outward. The iron core slot teeth are melted due to the short circuit of the coil or the iron contact.


The main reasons are: the pressure rings on both sides of the iron core are not pressed tightly, the iron core is not tightly fitted or the welding part is desoldered when the iron core is pressed into the frame. When the old coil is removed, the force is too strong, so that the teeth of the silicon steel sheet open outward in the axial direction, high heat is generated when the winding is short-circuited, which melts the slot teeth, the impact of mechanical external force.


Before repairing, the iron core should be cleaned to remove dust, grease, etc.


diesel generator set

If the iron core is loose and the pressure rings on both sides are not tight, a disc made of two steel plates can be used. Tighten and tighten the stud bolts to restore the iron core to its original shape. The skewed teeth can be corrected with needle-nose pliers.


If there is slack in the middle of the iron core, a hard insulating material, such as steel paper or steel cardboard, can be driven into the slack part. Any part of the iron core that is squeezed later should be painted with asphalt paint (such as No. 462 paint). If there are burrs and mechanical damage on the silicon steel sheet, use a fine file to remove the burr, smooth the depression, and use gasoline to brush the surface of the silicon steel sheet and apply a layer of insulating paint. If the burnt or melted surface of the iron core is not large and does not spread to the depth of the iron core, use a chisel to chisel off the iron core of the melted part, and then use a fine file and scraper to remove the burrs and remove foreign objects.


The above are the common faults and maintenance skills of the armature core introduced by Jiangsu Starlight Electricity Equipments Co.,Ltd., and I hope to be helpful to you. With the tenet of "meeting the needs of users", Jiangsu Starlight Electricity Equipments Co.,Ltd. has provided users with genuine spare parts, technical consultation, installation guidance, free commissioning, free maintenance, unit transformation and personnel training services for diesel generator sets for a long time. For more details, please contact us with sales@dieselgeneratortech.com.

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