Gear failure form: related instructions for gear damage and tooth fracture

Gear failure forms: The relevant descriptions of gear damage and gear tooth fracture are as follows, for reference.

Gear damage:

Overload caused by repeated bending stress and stress concentration or short-term overload or impact load will cause gear teeth to break.

Gear tooth fracture generally occurs at the root of the tooth.

Broken gear teeth:

Including tooth surface gluing, tooth surface wear, plastic deformation and tooth surface pitting, respectively as follows.

1. Tooth surface gluing

gearDuring continuous operation, due to the high relative sliding speed of the two gears, the instantaneous high temperature will cause the oil film to rupture, causing the adhesion and welding between the tooth surfaces. After the adhesion and welding are torn off, grooves are formed on the gear surface. This phenomenon is called tooth surface. glued.

Gluing is relatively serious adhesive wear.

2. Tooth surface wear

In gear transmission, when abrasive materials such as hard chips fall between the tooth surfaces, it will cause abrasive wear on the tooth surface; when hard teeth with rough surfaces mesh with a softer tooth surface, the tooth surface wears due to relative sliding.

After wear, the shape of the tooth profile is destroyed, causing shock, vibration, noise and even breaking.

3. Plastic deformation

Plastic deformation of the tooth surface will destroy the gear tooth profile, affect the meshing, and generate vibration and noise.

4. Pitting corrosion on tooth surface

Gear teeth work will produce alternating pressure, and the surface metal material will be plastically deformed-tiny cracks-crack propagation-surface metal shedding (pitting).

Pitting corrosion often causes strong vibration and noise, which can lead to gear failure.

Regarding the form of gear failure, if you have any unclear points or related processing requirements, you can consult EP Technology for free.