Broken tooth fastening device of giant gear and repair method

Abstract

The invention relates to a broken tooth fastening device of a giant gear and a repair method. The repair method comprises the following steps of (1) polishing; (2) detecting; (3) drilling: uniformly drilling at least three drilling holes in each tooth root repair surface of the gear; (4) fastening: respectively performing interference driving on metal bars into each drilling hole of the step (3), using the metal bars as reinforcing ribs in the repair gear, and welding the metal bars and the gear into a whole; (5) welding; (6) recovering. The invention further discloses the broken tooth fastening device of the giant gear. According to the broken tooth fastening device and the repair method, on one hand, the hardness and mechanical strength of the tooth surface of the gear can be greatly increased, thereby prolonging the service life of the gear, and the operating reliability is high; on the other hand, the operation is simple, the repair speed is high, and postweld heat treatment is not needed, so that equipment cannot be delayed for a long time so as not to cause heavy losses due to shutdown, the cost is greatly reduced, and economic benefits and social benefits are effectively increased.

Description

technical field [0001] The invention relates to the field of equipment maintenance, in particular to a broken tooth reinforcement device and repair method for giant gears. Background technique [0002] Giant gears are mainly used in water conservancy and hydropower, mining, metallurgy and machinery industries. They are characterized by large diameters, large loads, complex stress conditions, poor lubrication conditions, and harsh working environments. They are often greatly shortened due to adhesive wear and fatigue pitting its service life. Some gears are scrapped only because the tooth surface is sharpened or because individual teeth are broken or lost, which greatly reduces the utilization rate and work efficiency of the equipment. If it is treated as scrap steel after scrapping, it will be greatly reduced, not only causing waste of materials , but also lost a large amount of expenses. For example, the gear of a large ball grinding machine has a diameter of 4m, a weight...

AI Technical Summary

Problems solved by technology

[0002] Giant gears are mainly used in water conservancy and hydropower, mining, metallurgy and machinery industries. They are characterized by large diameters, large loads, complex stress conditions, poor lubrication conditions, and harsh working environments. They are often greatly shortened due to adhesive wear and fatigue pitting its service life

Some gears are scrapped only because the tooth surface is sharpened or individual teeth are broken or lost, which greatly reduces the utilization rate and work efficiency of the equipment. If it is treated as scrap steel after scrapping, it will be greatly reduced, which will not only cause waste of materials , and also lost a large amount of expenses

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