Causes of pitting corrosion of planetary reducer gear

Causes of pitting corrosion of planetary reducer gear

1. Influence of reducer manufacturing and assembly accuracy

One of the reasons for the early pitting corrosion of the planetary gear reducer is the low assembly accuracy, resulting in the reduction of the contact area of the gear and local overload, so that the actual contact stress exceeds the allowable contact stress of the gear material. This is caused by the non-parallel or excessive cross deviation of the two centerlines of the gear pair and the excessive tooth orientation error during gear processing.

Improper selection of gear material and heat treatment hardness results in low tooth surface hardness, which can not meet the machining requirements, and is also an important reason for pitting corrosion.

2. Impact of installation accuracy

Because the shaft alignment of the planetary reducer and the motor after installation does not meet the specification requirements, the motor coupling and the reducer input end coupling are not concentric, resulting in uneven stress on the gear at the reducer input end, and overload stress on one side of the transmission gear, causing pitting on the tooth surface, causing damage and failure of the gear wheel of the reducer.

3. Effect of lubricating oil

Lubricating oil can reduce wear in mechanical transmission, shock absorption, lubrication and improve the expected life of equipment. Therefore, in the daily gear maintenance, to create good lubrication conditions and adopt reasonable lubrication technology to reduce and reduce the pitting wear on the gear tooth surface is the subject that the field technicians of planetary reducer must pay attention to.