Generator carbon brush sparks, how to deal with?
From the following points: 1. check out whether the brush length is too short to cause the lifeline, the pressure is too small not brush contact ring; 2. check the spring pressure pressure is appropriate, if too small will lead to jump 3. check slip ring brush discharge; surface finish, if too much hair will increase the brush contact resistance of spark; 4. check the rotor electrical resistance, ensure the normal, no inter turn short; 5. check whether the oil bearing gap is too large, resulting in rotor slip ring brush runout, radial runout check slip surface is too large. The brush spark causes sparks; 6., whether the brush is the same as before, the brush has a requirement for the conductive current and the friction speed.
Method for treating spark of generator carbon brush1, check the length of the brush is too short to reach the lifeline, resulting in pressure is too small, the brush can not touch the slip ring;2, check the spring pressure refers to the right, if it is too small, will lead to brush discharge;3. Check the surface smoothness of the slip ring. If it is too thick, it will increase the contact resistance of the brush and cause a big spark;4, check rotor electrical, ensure normal resistance, no short-circuit between turns;5, check the bearing whether the oil gap is too large, resulting in rotor rotation, slip ring on the large number of brush, check the slip ring surface radial jump is too large. An electric spark is produced by an electric brush;6 、 and whether the brush is the same as before, the brush has a requirement for the conductive current and the friction speed.
Generator carbon brush spark prevention method: every day should be carbon brush and slip ring for inspection1, carbon brush wear length of not more than 2/3. When the wear length of the carbon brush exceeds the 2/3 (i.e. the top of the carbon brush is at the same level as the top of the brush holder), it must be replaced.2, carbon brush without sparking. When the carbon brush starts to spark, you must find out the reason and remove it in time.3, carbon brush without offset outer ring slip phenomenon, carbon brush edge without cracking.4 、 brush carbon brush and brush rack and carbon brush connection is good, no fever and touch brush grip.5, carbon brush in the brush without beating, shaking or stuck.
