1) Features of Spiral Bevel Gear

• Helical bevel gears constitute one of the most significant sources of vibration and noise within drive axle assemblies. The periodic variations in tooth surface errors and meshing stiffness serve as the root cause for inducing system resonance.
• Their characteristic lies in the extreme sensitivity of their NVH performance to installation errors, such as centre distances and misalignment. Even minute deviations may lead to deterioration in the contact zone, thereby generating substantial rumbling or knocking noises.

2) Functions of Spiral Bevel Gear

• Beyond transmitting power, its function manifests at the NVH level as ‘defining the system's acoustic character’. A well-optimised spiral bevel gear pair produces a smooth hissing sound, referred to by engineers as ‘white noise’, whereas a problematic gear generates unpleasant ‘tonal’ noise or impact sounds.
• By adjusting the position and size of the tooth contact area (such as offset tip or offset small end), the meshing excitation of the gear can be actively controlled, thereby suppressing vibrations at specific frequencies.

3) Application of Spiral Bevel Gear

Top-tier luxury saloons represent its primary application scenario, where NVH performance serves as the core selling point. Similarly, in premium electric coaches or next-generation electric vehicles, the absence of engine noise masking renders the meshing noise from spiral bevel gears within the drive axle particularly prominent. The level of NVH optimisation directly determines the perceived quality of the product.

YIZHI MACHINERY which is equipped with a full range of machining capabilities to satisfy customer needs.

Our team has extensive experience in precision gearing systems for numerous industries. We have supplied gears for mining equipment, power tools, hydraulic pumps and the rail transit industry.

The feature products are double helical gear and precision spiral bevel gear, equipped with Hofler Rapid and helix grinding machines, Niles ZE and ZP grinding machines and Gleason Phoenix bevel gear grinding machines. This capability allows us to provide quality customs made gears to domestic and overseas markets.