In gear transmissions, tooth surface wear often occurs. Wear is caused by many reasons. The medium wear is mostly caused by irregular tooth surface, large error of gear tooth shape, insufficient viscosity of the lubricant or some conditions to make the gear work under the lubrication boundary condition of the mixed film. The wear caused by heavy load, overload or poor wear resistance of the lubricant is more serious. The occurrence of such wear will quickly remove the tooth surface material, destroy the shape of the tooth and the smoothness of the gear device, and even cause downtime.
For example, the driving device of a conveyor belt conveyor adopts a worm gear reducer to transmit torque and power. Due to the change of the process route, the traction tension is increased. For this reason, the wear of the worm gear teeth is “shaved†for two consecutive times. , causing production suspension. The reason for the analysis is that the conveyor tension is increased by the conveyor belt manufacturer, the worm gear tooth bearing stress is increased, and the original N150 industrial gear oil is extremely poor in wear resistance, and it is difficult to form a chemical reaction film to separate the metal surface of the worm gear friction pair. The physical adsorption film or chemical adsorption film produced by the lubricating oil on the metal surface can not meet the lubrication requirements of the worm gear teeth subjected to high pressure, and the sliding speed of the worm gear is large, and the generated heat is large, which further promotes the lubrication of the lubricating oil. Invalidation, the worm gear teeth made of bronze material are quickly smoothed by the worm teeth made of steel.
Through the stress accounting analysis of the worm gear and the knowledge of the lubrication theory, it is decided to use the 320# medium extreme pressure industrial gear oil to lubricate the worm gear reducer, and the lubrication requirement is satisfied by replacing the lubricating oil, and the worm wheel wear phenomenon does not occur any more. This shows that the choice of lubricant has a lot to do with gear lubrication.
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