On-line slip ring repairing device and repairing method

Abstract

The invention relates to a repairing structure of a motor slip ring, in particular to an online slip ring repairing device and a repairing method. An online slip ring repairing device comprises a fixed support, an abrasive belt transmission mechanism and a grinding control structure. Wherein the abrasive belt transmission mechanism comprises a grinding abrasive belt, an abrasive belt transmission connecting rod, an abrasive belt fixing rod, a fixing vertical plate, an abrasive belt transmission rod, an abrasive belt transmission servo motor and a servo motor mounting seat; the coping control structure comprises a mounting base, a simulated carbon brush, a spring pressure finger and a mounting frame; the mounting base is fixed between the two fixed vertical plates, and the simulation carbon brush is pressed on the back surface of the grinding abrasive belt after fixation. In order to improve the working efficiency, on the basis, the double-linkage online slip ring repairing device is designed, two slip rings are repaired online at the same time, and the repairing efficiency is improved. The repairing device is simple in structure, light, low in cost, convenient, fast and effective to install and operate, and capable of reducing labor intensity.

Description

technical field [0001] The invention relates to a repair structure of a motor slip ring, in particular to an online repair slip ring device and a repair method. Background technique [0002] Slip rings and carbon brushes, as the sliding contact bodies that import and export current, are the key components that connect the generator excitation system to the rotor. The slip ring is fixed on the rotating shaft and rotates with the shaft. The carbon brush is fixed on the brush holder, which is a fixed part. It is crimped on the smooth surface of the slip ring through the brush holder and the circlip to transmit the excitation current to the rotor winding. A certain pressure is formed between the carbon brush and the slip ring to ensure continuous contact between the carbon brush and the slip ring. [0003] The good working condition of the slip ring is the key factor to ensure the normal operation of the generator. Due to the long-term sliding friction between the slip ring an...

AI Technical Summary

Problems solved by technology

Due to the long-term sliding friction between the slip ring and the carbon brush, ring fire burns, etc., the surface of the slip ring will have pits, pits, etc., and there may be slight burrs or uneven surface wear. Repair, the uneven surface of the slip ring will aggravate the wear of the carbon brush, which will cause the slip ring to burn and wear, and the surface of the slip ring will form waves, metal bumps and other bad conditions

At the same time, due to the uneven wear of the carbon brush, it is easy to cause point contact between the carbon brush and the slip ring, resulting in abnormal discharge phenomena such as arcing, which will cause overall damage to the motor

[0004] The common repair method is to manually use a file to repair the motor slip ring after the locomotive is shut down, and to polish the high points and metal bumps. The disadvantages of this repair method are: 1) This technology can only repair the surface with slight burrs or uneven surfaces Wear and tear; 2) For the wavy pits that have been formed, the more they are polished, the more pits will be, and it will not be repaired for a long time. The work efficiency is low, and the coaxiality size requirements of the slip ring cannot be guaranteed.

However, in the prior art, the carbon brushes are processed after removing the wound rotors for large and medium-sized wound motors. This processing and repair method is very troublesome. If you do not pay attention, it is easy to damage the stator and rotor coils; and the entire motor needs to be disassembled. It is time-consuming and labor-intensive to deal with, the production and processing cycle is very long, and assembly deviation will occur after reassembly, and the disadvantages are: 1) Using the extension bar turning tool can only turn the edge of the slip ring after grinding out the groove; 2) The operation process requires a turner with many years of turning experience, and the operation requirements are high; 3) The wavy pits that have formed cannot be repaired

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