How can we reduce gear wear and extend gear life?
Author:
Release Time:
2022-06-06
How can we reduce the wear of spur gears?
To reduce wear and extend the service life of gears, the following measures can be adopted. First and foremost, the selection of appropriate material is crucial, and the material must undergo proper tempering treatment. According to the variation pattern of the sliding coefficient between the two gears during transmission, the sliding coefficient at the root of the cast steel bevel gear teeth is higher than that at the tooth tip; moreover, the sliding coefficient at the root of the pinion gear is even higher than that at the root of the gear. To ensure that the root wear of both the large and small reduction gears is roughly equal, the pinion should be made from a harder material and subjected to heat treatment that results in a hardness level tens of HB units higher than that of the gear. Alternatively, the pinion can be manufactured using high-frequency induction heating along the tooth flanks followed by surface hardening, thereby significantly enhancing its wear resistance. During initial operation after replacing with new gears, it is usually sufficient to simply check whether the operation and sound of each component are normal. If everything appears basically normal, the gears can be put into service without conducting adequate running-in or no-load tests, which would fail to achieve the intended purpose of gear running-in.
What factors exacerbate gear wear?
The operators failed to lubricate according to the lubrication instruction sheet. According to the instructions, the oil cups for the roller bearings and transmission mechanism should be tightened every 8 hours. The grease for the precision bevel gears also needs to be replaced regularly. However, in practice, the lubrication intervals mentioned above have been far too long—some operators even only add lubricant during initial installation and never add or replace it again afterward. Moreover, some operators, after adding lubricant, leave small wooden strips, mud, stones, and other debris between the gear teeth, thereby worsening the lubrication environment and accelerating gear wear.
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