Gearboxes are used in a wide range of applications, especially in wind turbines, which are important mechanical components of wind turbines. According to the modular design principle of the unit structure, the gear box greatly reduces the types of components, and is suitable for large-scale production and flexible selection.
The common lubrication methods for gearboxes are gear oil lubrication, semi-fluid grease lubrication, and solid lubricant lubrication. For better sealing, high speed, high load, good sealing performance can be lubricated with gear oil; for poor sealing, low-speed can be lubricated with semi-fluid grease; for oil-free or high-temperature applications Molybdenum sulfide superfine powder lubrication.
The gear box is an important part of the wide application in mechanical transmission. When a pair of gears meshes, due to the inevitable error such as pitch and tooth shape, the meshing impact will occur during the operation and the noise corresponding to the gear meshing frequency will occur. Frictional noise occurs between the tooth faces due to relative sliding.
Since gears are the basic part of the gearbox drive, reducing gear noise is necessary to control gearbox noise. In general, the causes of gear system noise mainly have the following aspects:
1. Gear system and gear box. The assembly is eccentric, the contact accuracy is low, the parallelism of the shaft is poor, the rigidity of the shaft, the bearing and the support is insufficient, the rotation precision of the bearing is not high, and the gap is not good.
2. Input torque in other aspects. Fluctuation of load torque, torsional vibration of the shafting, balance of the motor and other transmission pairs, etc.
3. Gear design. Improper parameter selection, too small coincidence, improper or no shape modification, and unreasonable gearbox structure. In the gear processing, the base section error and the tooth profile error are too large, the flank clearance is too large, and the surface roughness is too large.