When the friction pair is in operation, one of them is because the viscosity of the lubricant is low, the speed is too low, the load is too large, and the oil film cannot be established; the second is that the circumferential speed is too large, the load is too heavy, and the sliding rolling and the quality of the lubricant are generated. Poor adhesion, inadequate viscosity, and lack of oil caused by varying degrees of adhesive wear; Third, the particles in the lubrication system mixed with external dust and internal wear debris, colloidal and other impurities caused by particulate wear; Fourth, the contact stress in the cycle Under the repeated action, the gears are subject to fatigue wear, which causes pitting, spalling, and breaking of the surface materials; Fifth, the chemical action of the influent water, metal particles, chemical contaminants, and lubricating oil and the participation of oxygen in the lubrication system. Lower corrosion caused by wear and so on.
In short, the damage of the sprocket is caused by the abrasion, pitting, and fracture of the gear caused by the interaction between the friction and the medium, such as sliding, rolling, impact, and lubricating materials.
