How to Maintain The Carbon Brush of Diesel Generator Set? 2

This article provides a detailed introduction to the maintenance of carbon brushes in diesel generator sets.

1. Run inspection

1) Strengthen regular and irregular patrol inspections of diesel generator sets. Under normal circumstances, staff must inspect the generator carbon brushes twice a day in the morning and afternoon.

2) Use an infrared thermometer to measure the temperature of the collector ring and carbon brush. During peak load periods in summer and when there are significant fluctuations in reactive power and voltage, the temperature measurement interval should be shortened.

3) Conduct a thorough inspection of the newly replaced carbon brush and keep a record of the equipment's operating conditions during routine checks.

2. Maintenance and replacement: Conduct acceptance inspection on newly purchased carbon brushes.

1) Measure the inherent resistance value of the carbon brush, measure the contact resistance of the carbon brush lead, and ensure that the resistance value meets the manufacturer's and national standards.

2) Strictly adhere to the process of replacing carbon brushes, and the carbon brushes used in the same diesel generator set must be consistent and not mixed.

3) Before replacing the carbon brush, carefully grind the carbon brush to make its surface smooth. The brush should have a gap of 0.2-0.4 millimeters in the brush holder and move freely up and down inside the brush holder.

4) The distance between the lower edge of the brush holder and the working surface of the commutator should be kept at 2-3 millimeters. If the distance is too small, it will collide with the commutator surface and cause damage. If the distance is too large, the electric brush will jump and spark easily.

5) Strive to achieve a carbon brush contact surface greater than 80% of the carbon brush cross-section, and replace it frequently. However, it is not advisable to replace too many carbon brushes multiple times. The number of carbon brushes replaced at once should not exceed 10% of the total number of single poles. Carbon brushes with a top 3mm lower than the top of the brush holder should be replaced as soon as possible. The same type of carbon brush must be used every time the carbon brush is replaced, but attention should be paid to saving and fully utilizing the carbon brush.

6) After replacing the carbon brush with a new one, it is necessary to use a DC caliper gauge to measure the carbon brush current distribution and an infrared thermometer for temperature testing to prevent individual carbon brushes from overheating due to overcurrent.

7) The brush holder and brush holder should be carefully adjusted during major and minor repairs of the unit. When replaying and installing the brush holder, the angle and geometric position should be ensured to be in their original state. The sliding edge and sliding edge of the carbon brush must be parallel to the commutator.

3. Daily maintenance

1) Clean and blow dust frequently, keep the carbon brush and commutator slip ring clean, and in case of strong wind weather, clean them promptly afterwards.

2) Adjust the spring pressure frequently, and the pressure of the carbon brush spring should comply with the regulations of the manufacturing agent, so that the carbon brush can withstand pressure evenly.

3) Prevent individual carbon brushes from overheating or generating sparks, and prevent the occurrence of burnt or broken bristles.

4) Any problems that arise during the operation of carbon brushes must be promptly eliminated to avoid a vicious cycle that could jeopardize the normal operation of the unit.

In summary, it is of great significance for users to carry out various maintenance and upkeep work on diesel generator sets, not only for the maintenance of carbon brushes, but also for the maintenance of other easily worn parts. If you encounter difficulties in troubleshooting unit faults, please contact a professional diesel generator set manufacturer in a timely manner for on-site assistance in maintenance. If you want get more information, please feel free to send email to sales@dieselgeneratortech.com we will pay highly attention on your question.