The main problems existing in the large-scale wind power gear box in our country

The most important problem in large-scale wind power gear box 2019 - 07 - 22 Wang Shuxiang ( Nanjing AnWeiShi transmission technology co. , LTD. ) Bearing in wind power generation device, easily damaged because of its equipment is too big, maintenance inconvenience, so the device must have a long working life, usually is not less than 20 years, and today's wind power equipment failure problems in gear box is growth, and the bearing is the most easy to occur in the gear box fault components, thus reasonably choose bearing is very important for the gear box of the operation, but also accurately predict its service life. Bearing life mainly refers to the fatigue life of bearing, the bearing of the operation process, as a result of the ring and rolling body contact, make its surface after alternating load repeatedly function and form of fatigue spalling, if this fatigue spalling occurs outside the service life of bearing period is normal bearing damage, on the other hand, are not qualified. Load data processing incomplete due to various places have different climate in our country, some of the wind turbines are harsh environment, cause the wind turbines on the load is complicated, however, at present our country is still in its infancy to complex load data collection and, at the same time for the processing of complex load method is not perfect, the instantaneous load, brake load and ultimate load with processing, all are calculated on the basis of past experience, in addition to the processing of variable load, using the linear accumulated damage theory is not mature enough, resulting in its basic calculation is not reasonable. The immature gear fatigue strength design calculation method of calculation model in the fatigue life of wind power gear box bearing, gear to fatigue strength calculation of the wind power generator system in our country, for the calculation method of the gear bearing capacity is not enough mature, this basically is compared with the developed countries, such as the United States on the design of the wind turbine gearboxes according to AGMA 2101 - C95 or ISO6336:1996 standard to calculate, but our country is generally calculated according to GB3480, though the two calculation methods each have their own characteristics, but compared to developed countries is relatively mature, while the design and calculation method of our country lags behind many. Conclusion in wind turbines, wind load of gear box is very complex, and this part is the key and foundation design and manufacture, so in order to ensure continued operation of wind turbines, ensure that wind power don't interrupt, the unit does not fail, the gear box structure optimization, bearings, and other key parts design is very necessary.