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Noise analysis of planetary gearbox

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Noise analysis of planetary gearbox

2021-04-09 16:39:07   |  Noise analysis of planetary gearbox

Planetary gearbox is an important component widely used in mechanical transmission. When a pair of gears mesh, due to the inevitable error of tooth pitch and tooth profile, meshing shock will occur during operation, which corresponds to the gear meshing frequency. Noise, friction noise also occurs due to relative sliding between tooth surfaces. Since gears are the basic parts of gearbox transmission, reducing gear noise is necessary to control gearbox noise.

 

planetary gearbox

 

Generally speaking, the main causes of gear system noise are as follows:

 

1. Gear design. Improper selection of parameters, too small overlap, improper or no modification of the tooth profile, unreasonable gear box structure, etc. In terms of gear processing, the base pitch error and tooth profile error are too large, the tooth side clearance is too large, and the surface roughness is too large.

 

2. Gear train and gear box. The assembly is eccentric, the contact accuracy is low, the parallelism of the shaft is poor, the rigidity of the shaft, bearing, support is insufficient, the rotation accuracy of the bearing is not high, and the clearance is improper.

 

3. Other input torque. The fluctuation of load torque, the torsional vibration of the shaft system, the balance of the motor and other transmission pairs, etc.

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Features and application of planetary gearbox
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Design technology of planetary gearbox reduction motor
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The planetary gearbox reduction motor has the characteristics of small size, compact structure and high transmission efficiency. At present, it has been widely used in gear transmission devices such as aero engines, lifting and transportation, and smart home kitchens. The planetary gearbox is a key part of the gearbox motor. , The production accuracy and production quality of the planetary gearbox directly affect the life of the planetary motor.

The internal structure and working principle of the planetary gearbox
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The planetary gearbox is also called the gearbox. Its structure is a mechanism in which multiple planetary gears rotate around a sun gear. It is also a mechanism that reduces the transmission speed ratio while increasing the torque of the motor proportionally.

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Shanghai Dongzhan Transmission Electromechanical Co., Ltd.