How to reduce noise in the design of gear reducer?

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The influence of gear reducer manufacturing accuracy on noise mainly includes three factors: accumulated pitch error, pitch deviation, radial runout and total tooth profile deviation. What are the noise reduction methods of gear reducer? 

1. Coefficient of gear overlap and displacement? The stability between gears is proportional to the coefficient of gear meshing overlap. With the increase of the coefficient of gear meshing overlap, the noise of gears will be smaller. This is the basic principle of adjusting the coefficient of gear overlap. In the process of adjustment and design, designers should first choose helical gears to drive, increase the meshing section and stiffness of gears, and improve the noise of gears. Control. To a great extent, the modification coefficient of gears will restrict the strength of gears, improve the matching effect of gears, and affect the meshing noise between gears. 

2. Improvement methods of gear modulus and tooth number design? There is a close relationship between gear modulus and rigidity in the design process. In the improvement process, the greater the transmission power, the greater the possibility of gear deformation; the greater the modulus, the smaller the noise. In actual operation, gears with small loads will have less design modulus in order to improve economic efficiency.

3. Profile modification? Under load, the gear will deform when it is running. The research shows that the profile shape of gear has a great influence on the noise intensity of gear. The profile modification can be divided into root modification, flange modification and K-shaped tooth modification. In the modification of meshing gears, the designer should consciously modify the shape deviation to ensure that the root and top of the teeth are trimmed.

4. Other noise reduction improvement methods? The noise reduction design improvement of gear reducer includes helix modification, accuracy grade and roughness improvement, and the use of fine and high teeth. In the process of helical profile modification, micro-modification is mainly carried out according to the direction of the tooth line to maintain the deviation between the tooth surface shape and the original tooth shape. The accuracy grade and the tooth surface roughness will affect the noise generation of the gear to a large extent. The meshing error of the gear in the process of light load is smaller, while that in the process of heavy load is the opposite. When the accuracy level is adjusted, the gear noise will be greatly reduced. Designers should properly use lubricants to reduce friction between tooth surfaces and noise intensity.

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