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天然气发电机组电刷冒火花的原因

来源:http://www.huannengpower.com   发布于:2017-02-17

  天然气发电机组电刷冒火花的原因:

  The reason of the spark of the brush of the natural gas generator set:

  1、轴承振动大。一二期大轴都带励磁机,由于轴承长、带的附加设备多了,振动自然就很难控制到低。柴油发电机组长时间运行,疲劳、老化等等复杂因素引起轴承振动加大,电刷随着震动,将使刷柱摩擦不均、引线及弹簧松动,发生局部冒火花慢慢进一步影响全局。

  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、电刷表面不洁。这一点让人忽略的,正常运行的发电机电刷密封在密闭的柜子内,两极电刷中间有套在轴上齿轮状轴流风扇,靠转子转动把磨下的石墨碳粉、电刷的发热及时抽走,达到清洁冷却的作用。如果柜门关不严,或巡检时忘记关门,外面的粉尘伴随着热空气吸进电刷,附着在刷柱上,一方面影响电刷散热。另一方面电刷发生火花时因刷柱表面不洁,刷柱之间绝缘强度不够很容易环火。

  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.

  此外滑环上车有螺旋状一道道沟槽,这是为了增加电刷散热面积,改善同电刷接触,使电刷更充分冷却,同时更容易让碳粉抽走。柜门若关不严,风扇抽力不足外面粉尘也很轻易附着在螺旋状沟里,后果是可想而知的。励磁机电刷考虑其电压等级比较低裸露在外面,在此也建议一下检修定期清洁。前几天我厂发生过励磁电刷冒火花被迫停机事件,原因多方面的,往往小事酿成大祸。我们应该引起足够重视。

  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.


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