1. Normal wear (this refers to very fine particles, manifested by darkening of the lubricating oil)
2. Excessive load or impact beyond design, pitting or sticking.
3. Failure to change the lubricating oil for a long time will aggravate particle wear.
4. The gear processing precision is not enough, and the surface roughness is not enough.
5. Assembly accuracy is not sufficient or the working environment exceeds design expectations.
Usually, the speed of the wind wheel is very low, much lower than the speed required by the generator for electricity production. It must be achieved through the effect of increasing the speed of the pair of gears in the gearbox. , that's why it is also called gearbox for speed increase box. According to general unit configuration requirementsé, sometimes the transmission shaft (commonly called large shaft) directly connected to the hub of the wind turbine is integrated with the gearbox, or the large shaft and the gearbox are arranged separately, with a sleeve device expansion or coupling used. In order to increase the braking capacity of the unit, a braking device is often installed at the input end or output end of the gearbox, and is used in conjunction with peak braking ( fixed pitch wind turbine) or the variable pitch braking device to jointly brake the transmission system of the unit.