May 31, 2023

How to Reduce the Noise of the Gear Reducer?

The gear reducer will emit a certain amount of noise during its operation. This is because during its operation, the gears in the machine mesh to generate periodic alternating force, which is caused by the vibration caused by the action on the bearing and the box itself. The noise is too high. It will not only affect the normal work, but also indicate that there is a problem with the internal gear, so what are the factors that affect the noise of the gear reducer?

1. Gear processing error
The impact of gear structure design and manufacturing accuracy on noise is very important. Gears with reasonable design and high level of working stability will suffer less impact and vibration during transmission, and the noise will also be small.

2. Working stability and precision
The working stability and precision of the gears are very low, and there will be errors every time the gears rotate, which will cause the gears to collide and vibrate during the meshing process, forming high-frequency impact noise.

3. Gear contact accuracy
The gear with poor contact will have a lot of noise. Generally, the tooth direction error affects the contact in the tooth length direction, and the base joint deviation and tooth profile error affect the contact in the tooth height direction, etc., which will lead to unsatisfactory gear contact.

4. The motion accuracy of the gear
The motion accuracy of the gear refers to the accuracy of the transmission motion, that is, the angle error of each revolution of the gear should not be too large. When the accumulative error of the gear rotation increases, the impact of the gear meshing and the change of the angular velocity will cause the noise to increase significantly, and “rumbling” will appear. ” noise.

5. The wheel body is eccentric and heavy
The eccentric and heavy gears of the wheel body will generate unbalanced centrifugal force during meshing operation, which will cause the vibration of the wheel train and generate noise.

Gear Reducer

How can the noise of the gear reducer be reduced?

In order to reduce the noise of the gear reducer, we mainly start with the gear design and the maintenance of the gear reducer:

1. Adjust the gear overlap coefficient and variation coefficient. The stability of the gear is directly proportional to the gear mesh overlap coefficient. The greater the gear mesh weight coefficient, the smaller the gear noise. Helical gear transmission can be used to increase the gear mesh section and gear stiffness. , Improve gear noise control. The coefficient of variation of the gears will also restrict the strength of the gears, improve the matching effect of the gears, and affect the meshing noise between the gears.

2. Design of gear module and number of teeth
There is a close relationship between the modulus and rigidity of the improved gear during the design process. The greater the transmission power, the greater the possibility of gear deformation. That is to say, under normal circumstances, the greater the modulus, the lower the noise.

3. The tooth profile shape of the modified gear has a great influence on the strength of the gear noise, so the gear needs to be modified if it is deformed. The tooth profile modification can be divided into root repair, edge repair and K-shaped tooth repair. When modifying the shape, attention should be paid to modifying the shape deviation to ensure that the root and top of the tooth are trimmed.

4. Other design improvements
The noise reduction design improvement of the gear reducer also includes the modification of the helix, the improvement of the accuracy level and roughness, and the use of fine and high teeth.

5. Daily maintenance of gear reducer
The daily use of the gear reducer should pay attention to the normal operation method, and it needs to be cleaned and maintained regularly, and the gearbox should be cleaned and changed regularly. Lubricants can be used appropriately to reduce the friction between the tooth surfaces, thereby reducing noise intensity.