Noise treatment of gear box

The gearbox is an important part widely used in mechanical transmission. When a pair of gears mesh, due to the inevitable errors such as tooth pitch and tooth shape, meshing impact will occur during operation and noise corresponding to the meshing frequency of the gears will occur. , Friction noise also occurs between the tooth surfaces due to relative sliding. Since the gear is the basic part in the transmission of the gearbox, it is necessary to reduce the noise of the gear to control the noise of the gearbox. Generally speaking, the main causes of gear system noise are as follows:
1. Gear design. Improper parameter selection, too small overlap, improper or no modification of the tooth profile, unreasonable gearbox structure, etc. In terms of gear processing, the base joint 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 gearbox. Assembly eccentricity, low contact accuracy, poor parallelism of the shaft, insufficient rigidity of the shaft, bearing, and support, low rotation accuracy of the bearing, and improper clearance, etc.
3. Other input torque. Fluctuation of load torque, torsional vibration of shafting, balance of motor and other transmission pairs, etc.