Gear refers to a mechanical element that continuously meshes with the rim to transmit movement and power.The application of gears in transmission appeared very early.The normal operation of gears will directly affect the operating efficiency of mechanical equipment.Therefore, in the protection of equipment, it is very important to check whether the gear can still work normally.
1. Tooth surface wear.Under normal circumstances, as long as abrasive particles are mixed in the lubricating oil, the tooth surface abrasive particles will wear out during operation.
2. Glue the tooth surface.Once the lubrication condition is not good, the oil film between the tooth surfaces will disappear, so that the metal surfaces of the two gear teeth are in direct contact and then adhere to each other.When the two tooth surfaces continue to move relative to each other, the harder tooth surface tears part of the material on the softer tooth surface along the sliding direction to form a groove.
3. Fatigue and pitting.Under the action of long-term alternating contact stress, small cracks will appear at the tooth surface knife mark.Over time, this crack gradually spreads laterally on the surface.After the crack forms a ring, a small area of the gear tooth surface will fall off, forming some fatigue shallow pits.
4. The gear teeth are broken.When the project is runningGear shaftWhen the pulse cycle stress of the load-bearing root exceeds the fatigue limit of the gear material, the root will crack and gradually expand, and when the rest cannot bear the transmission load, tooth fracture will occur.During operation, gears may also break due to severe shocks, unbalanced loads and uneven materials.
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