Function of slip ring
1. Slip rings are also called conductive rings, slip rings, slip rings and confluence rings. It can be used in any electromechanical system that needs contact rotation and needs to transmit power box signal from fixed position to rotating position. Slip ring can improve the system performance, simplify the system structure, and avoid twisting when the conductor rotates.
2. Slip rings are generally used in the commutator of motors as sliding contacts to introduce current. It has good electrical, thermal and lubricating properties, and has certain mechanical strength and the instinct of reversing sparks. Almost all motors use crystal slip rings, which is an important part of motors. Slip rings are widely used in various AC /DC generators, synchronous motors, battery DC motors, crane motors and various welding machines.
3. Widely used in synchronous motors, including hydro-generators with low peripheral speed. Forged steel is sometimes used for slip rings, mainly emphasizing mechanical strength and wear resistance at high peripheral speed, such as automobile generators. In addition, in the case of corrosion resistance, stainless steel can be used, but the sliding characteristics of stainless steel are unstable, and the combination with the brush is not suitable, which often causes the brush to jump, which may easily lead to excessive temperature rise or abnormal wear of the brush, so we must pay more attention when using it.
Treatment of short circuit fault of collector ring
During the operation of the motor, the voltage will suddenly drop, so it needs to be sent to the motor maintenance department for maintenance. After inspection, the technicians found that the two slip rings were short-circuited, and the joint between the slip ring and the winding would turn black, and the insulation sheets at both ends of the connecting column were also punctured, which would have a burning smell. This is because my motor has not been maintained for a long time, and there will be soot and dust deposition during operation, and then it will be wet, which will lead to the decrease of the resistance of the slip ring. After a long time, it will be burnt.
After finding out the reason, we can first remove the end cover of the collector ring, then clean up the oil and dust on it, then loosen the screws inside and clean up the bamboo pieces. , check whether the resistance is good, and then assemble the testing machine to see if the motor is normal. Therefore, it is very important for us to maintain the motor at ordinary times, which can reduce the occurrence of faults. Of course, we must find a professional electrical mechanic to deal with these problems.