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Gearbox is a basic transmission device widely used in many industries. Its quality level and performance directly determine the level and performance of the supporting hosts. A pair of gears meshing frequency corresponds to the meshing impact and noise, which is due to the relative sliding friction between tooth surfaces. Because gear is the basic part of gearbox transmission, it is necessary to reduce gear noise to control the noise of gearbox.
Generally speaking, the noise of gear system is mainly caused by the following aspects:
1. Gear design. The according reasons could be: parameter selection is improper, the overlap is small, the shape of the tooth profile is improper or unshaped, the gear box structure is not reasonable.
2. Gear and gear box. Assembly eccentric, low contact accuracy, horizontal difference of shaft, bearing, low rotation precision and improper clearance.
3. Input torque in other areas. Fluctuation of load torque, torsional vibration of shafting, balance of motor and other transmission pairs.