What are the precautions for using carbon brushes

The carbon brush needs to be replaced after the degree of wear , But if you are ready to replace the carbon brush , It is recommended to replace all carbon brushes at one time . If the new brush is mixed with the old one , The current distribution may become uneven .

For various types of large motor sets , When the replacement of carbon brush due to stop affects normal production , We can generally recommend replacing each time 20% Carbon brush , namely 1 Of each brush rod of each motor 20%. If you change it like this , About each time 1~2 The interval of weeks , After phased familiarity , It can ensure the replacement of other carbon brushes .

however , What many of our customers need to pay attention to is , On the same motor , When replacing the carbon brush , Try to use the same type of carbon brush , But even for individual medium-sized motors with particularly difficult commutation , You can also use twin carbon brushes . Gemini carbon brushes slide better , Therefore, a carbon brush that can suppress sparks while sliding is adopted .

Mofuron technology double servo motor rotor commutator finishing machine is specialized in micro motor 、 automobile 、 Motorcycle starting motor products , It is mainly used for precision turning of micro motor rotor commutator , The motor commutator has high gloss , Sparks between carbon brushes

Check the carbon brush and slip ring every day . The main inspection items are as follows .

1 . The wear length of carbon brush shall not exceed 2/3. If the wear length of the carbon brush exceeds 2/3 ( That is, the top of the carbon brush and the top of the brush holder are located on the same plane ), Please replace it .

2 . No spark from the carbon brush . When the carbon brush starts to spark , We have to find out why , Immediate elimination .

3 . The carbon brush does not offset the outside of the slip ring , The edge of the carbon brush does not collapse .

4 . Carbon brush braids 、 The brush holder and carbon brush are well connected , No heat , Will not touch the brush holder .

5 . The carbon brush shakes in the brush holder 、 Shake 、 When there is no astringency .

6 . Regularly measure the current sharing uniformity of each carbon brush with a DC clamp meter , Check whether the carbon brush is overheated with infrared thermometer , If there is any abnormality, replace it immediately .

7 . The spring pressure is normal , No deformation and fracture . Under normal conditions, the pressure on each carbon brush must be uniform and stable . The unit pressure is usually 1.1kg~2.5kg Between , The uneven pressure difference between carbon brushes shall be within 5% within .

8 . The distance between the brush holder and the slip ring shall meet the specified value . Distance between generator brush support and slip ring ： 2.5~3 mm, Distance between main excitation brush support and slip ring ：2~4 mm.

9 . There is no discoloration on the surface of the slip ring 、 Overheating and uneven wear , The surface temperature of the slip ring should be within 120 following .

10 . Whether there is dirt in the brush holder and brush holder . When there is more scale , Clean with a brush or remove with compressed air . The nature of carbon brush spark 、 Grade and adjustment method .