Carbon brush installed

1. Carbon brush into the brush to ensure that the upper and lower free to move, brush and brush the inner wall of the gap between 0.1-0.3 mm, to avoid the carbon brush and brush grip due to excessive clearance generated swing. Brush the lower edge of the edge from the commutator surface distance should be maintained at about 2 mm.

2. In the same motor, in principle, should use the same type of carbon brush, but for the individual for special difficulties in large and medium-sized motor, can be used Gemini brush, sliding into the edge of the use of good lubrication, Sparks capable of strong carbon brushes, so that the operation of the carbon brush is improved.

3. Apply to the same motor carbon brush unit pressure should strive to uniform, so as to avoid uneven distribution of current, resulting in individual carbon brush overheating and sparks. The unit pressure of the carbon brush should be selected according to the "carbon brush technology performance table". For motors with higher speed or motor operating under vibration conditions, the unit pressure should be increased to ensure proper operation. For example: traction machine motor carbon brush unit pressure of 0.4-0.6kgf / cm2. The rapid development of the national economy, expanding the already serious demand for power supply gap, the new unit, the industry's own power supply system and self-equipped engine system installation and installation applications, such as "springing up" everywhere. The generator excitation system of carbon brush operation and maintenance technology is the traditional technology, technology and technology over the years no substantive breakthrough. Therefore, the parties on the generator excitation system is not enough attention, limited investment, which led to the excitation system carbon brush accident. Nearly a period of multi-period safety bulletin, continuous notification of a large number of large generating units, due to carbon brush or rotor ring failure caused by downtime, to the enterprise caused greater economic losses. When the introduction of the export current of the carbon brush operation failure, how to identify the type and nature of the fault in order to eliminate the failure as soon as possible to ensure the stable operation of equipment, we need to seriously think about. I combined with years of work practice, talk about the application of motor carbon brush for the reader's reference, in order to jointly avoid the occurrence of carbon brush accident.