The reason of the spark of the brush of the natural gas generator set:
1, bearing vibration. The one or two stage of the shaft with the exciter, because the bearing length, with additional equipment, vibration is difficult to control the natural minimum. Diesel generator long time operation, fatigue, aging caused by complex factors of bearing vibration increase, brush with the shock, the brush friction uneven, column lead and loose spring local sparks slowly further affect the overall situation.
2, the surface of the brush is not clean. Most people ignore this point, the normal operation of the generator brush in sealed cabinet, two middle brush is sheathed on the shaft gear shaped axial fan, by rotation of the rotor to ground heating under the graphite powder, brush the time off, to clean the cooling effect. If the door is not closed tightly, and forgot to close the door or outside the patrol, accompanied by hot air sucked into the dust brush, brush attached to the column, hand brush cooling effect. On the other hand, when the brush is not clean because of the surface of the brush, the insulation strength of the brush column is not easy to ring the fire.
In addition the car have a slip ring spiral groove, which is in order to increase the cooling area of the brush, brush the brush with improved, more fully cooling, but also easy to let the toner removed. If the door is not closed tightly, the fan inadequate pumping power outside dust very easily also attached to the spiral ditch, the consequences are as can be imagined. Exciter brush to consider its voltage level is relatively low exposed on the outside, it is recommended that the maintenance of regular cleaning. A few days ago I had a brush factory excitation electric sparks forced to shut down the event, many reasons, things often lead to disaster. We should pay enough attention to it.