How to reduce the noise and vibration of FF97 hard tooth gear reducer

Reducing the noise and vibration of FF97 hard tooth gear reducer can be approached from the following aspects:

Gear Design and Manufacturing

Improving gear accuracy: Strive to increase the precision level of gears as much as possible, such as through precision machining processes such as grinding and hobbing, to ensure low gear tooth surface roughness, small tooth pitch error, and small tooth profile error. This can reduce transmission errors and noise.

Optimize gear parameters: smaller gear pressure angles or increased tooth height can be used to improve coincidence, make gear meshing smoother, and reduce noise. At the same time, choosing gears with small module and large number of teeth, the noise of small module gears is relatively low when the gear volume is the same.

Shaped tooth design: adopting special tooth profile designs such as tooth top trimming and tooth direction trimming, optimizing the load distribution and sliding speed during meshing, and reducing impact and friction noise.

Selection of suitable materials: Low carbon alloy steel can be used as the gear material, which has been carburized and quenched. It has high surface hardness and good core toughness, reducing meshing wear and vibration. In light load and low-speed scenarios, it is also possible to consider using engineering plastics such as nylon and phenolic resin to make gears, utilizing the material's own elasticity and damping characteristics to reduce noise. The box material can be made of gray cast iron or ductile iron, which has better vibration reduction performance and can suppress box resonance.

Installation and assembly

Ensure installation accuracy: Ensure that the gearbox is securely installed on a sturdy and level surface. Unstable or uneven installation surfaces can cause additional vibration and noise during machine operation. At the same time, it is necessary to ensure the concentricity of the gear shaft assembly and avoid vibration caused by eccentricity.

Reasonably adjust the backlash: When the transmission torque has pulsation, reducing the backlash can reduce noise, but if the backlash is too small, it will increase the occurrence of noise. It is necessary to adjust the meshing clearance between gears correctly according to the actual situation.

Pre tightening and positioning of bearings: Reasonably design the pre tightening force of bearings, eliminate axial and radial clearances, and avoid impact noise caused by loose bearings. Precision rolling bearings or liquid dynamic pressure sliding bearings can be selected. Liquid dynamic pressure sliding bearings buffer vibration through oil film, resulting in lower noise.

lubrication management

Choose suitable lubricating oil: Choose lubricating oil with low viscosity and high extreme pressure performance, such as synthetic gear oil, which can reduce friction and wear during gear meshing, thereby reducing noise. Oil pump circulation lubrication can also be used instead of splash lubrication to ensure that gears and bearings are always under oil film protection, reducing dry friction noise.

Regularly replace lubricating oil: Regularly inspect and replace lubricating oil to maintain its cleanliness and performance, ensuring good lubrication effect and reducing noise.