Generally, there are three kinds of failures of sprocket shaft group: sealing failure of sprocket shaft group; tooth shape failure of sprocket body; sprocket bearing failure; the following foresight small braid will take you to analyze the causes of failure.

Sealing failure of sprocket shaft group

The reasons for the seal failure of the sprocket shaft group include the serious wear of the sealing surface of the floating oil seal caused by the oil pollution, the eccentric load of the sprocket, the excessive clearance caused by the loosening of the end cover or the through cover bolt, and the improper assembly of the floating sealing ring;

Based on the different wear mechanism, the tooth surface wear can be divided into four basic types: abrasive wear, adhesion wear, fatigue wear and corrosion wear.

Abrasive wear is mainly caused by pear groove and micro cutting; fatigue wear is caused by surface fatigue crack initiation and propagation under cyclic stress; corrosion wear is caused by chemical action of environmental medium; in actual wear phenomenon, several forms of wear usually exist at the same time, and one kind of wear often induces other forms of wear. The clean surface formed by abrasive wear may increase the adhesion of molecules, resulting in adhesive wear. At the same time, the molecules of gear materials may cause corrosion wear due to oxidation or chemical reaction of surrounding media.

Sprocket shaft group

From the macroscopic point of view, according to different wear and damage phenomena, the wear of tooth profile mainly includes tooth surface wear, scratch, pitting, crack, peeling and gluing.

The reasons for tooth failure are: the hardness of sprocket is not enough; hard particles are rolled; the matching accuracy of sprocket and chain link is not enough; there are stress concentration points in sprocket processing; chemical erosion and other reasons.

The seal failure and tooth wear of sprocket shaft group are common failures of sprocket shaft group.

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