THE WARDSHIP AND DEALING WITH THE MALFUNCTION OF CARBON BRUSHES

We should take some measures to vindicate the carbon brushes when it is on working.It will bring some accidents or affect the company running when we ignore to vindicate the carbon brushes.On the other hand,the factory can find problems and have some ways to solve the problems in time when we give enough attention on vindicating the collecting electricity facility.The carbon brushes can not only transmit electricity but also can commutate when it used in the electric motor with commutator. So we have to take more time to give enough maintenance on carbon brushes. It is very important in observing carefully about commutate spark shape. The spark shape and size are important reflection of the DC motor running,which is the main symbol of the carbon brushes quality. So giving enough observation about the spark will find the reason and the movement rule of the electric motor.

The shape of the spark when the electric motor are running are normally spot shape(very faintness and discontinuousness);graininess shape(bigger than spot spark,more light than the spot spark);fireball shape spark(it is on the carbon brush sliding side,red and white bright ball shape spark);flame shape spark(the lengh of the spark when the carbon brush are sliding out. There is short tongue of flame which is normally red.)fulmination shape spark(the spark is very bright and discharging);splash shape spark(long flame and spark splash);fire ring shape spark(it is forming fire ring when the carbon brush slid out,which will bring positive&negative carbon brushes arc short circuit)