Can the ring gear reduce mechanical vibration and noise by changing the tooth shape?

Ring gears can effectively reduce mechanical vibration and noise by changing the tooth profile. The following is an introduction to how tooth profile optimization affects vibration and noise from multiple perspectives:
1. Use helical teeth instead of straight teeth
When the spur gear ring is engaged, the tooth surface instantly contacts, causing significant impact and easily generating noise and vibration;
When the helical gear ring meshes, the tooth surface gradually contacts, the contact time is longer, the meshing is smoother, and it can significantly reduce the impact force;
The disadvantage is that helical teeth generate axial force, but this can be overcome by designing bearings.
2. Adopt high-precision tooth profile machining
The higher the precision of tooth profile machining, the more uniform the gear meshing, and the smaller the transmission error;
Precision gear grinding technology and gear hobbing can reduce the vibration caused by gear eccentricity and runout;
High precision ring gears run more smoothly and produce lower noise at high speeds or heavy loads.
3. Perform tooth profile modification (top repair/root repair)
Proper shaping of the tooth crest and root (such as chamfering and chamfering) can reduce the impact during the initial meshing stage;
Reduce the local meshing and biting problems caused by gear edge meshing;
It can reduce load concentration and periodic vibration during operation.
4. Use involute tooth profile optimization
The involute profile has excellent transmission performance and is currently the most widely used profile;
Further optimization of parameters such as pressure angle and displacement coefficient can be carried out on the basis of involute to adapt to different working conditions;
Reasonable design of involute tooth profile can control contact ratio and improve meshing smoothness.
5. Increase the contact ratio
Increasing the contact ratio (i.e. the number of tooth pairs involved in meshing at the same time) can disperse the load and reduce the unit tooth surface pressure;
The higher the contact ratio, the more continuous the meshing, the smoother the transmission, and the smaller the vibration and noise;
This can be achieved by increasing the tooth width or optimizing the tooth height.
6. Adopt low-noise tooth profiles (such as modified gears)
Some industries (such as automobiles and aviation) adopt low-noise tooth profile design, such as variable gears;
The gear is modified through CNC technology to make the meshing process smoother and reduce resonance;
Very effective in high-speed and high-precision applications.