The gearbox is an important mechanical component in the wind power generating set. Its main function is to transmit the power generated by the wind wheel under the action of the wind to the generator and make it obtain a corresponding speed. Due to the irregular direction change, variable load wind force, and various extreme weather effects, the wind power gearbox needs to ensure a service life of up to 20 years, which puts higher requirements on the bearings. At present, my country's wind power gearbox bearings basically rely on imports, and the localization rate is extremely low, which greatly limits the improvement of domestic wind power technology.
In order to break through the wind power gearbox bearing technology, Shaft Research Technology has established a dedicated R&D team. Based on years of bearing research and development experience, according to the working condition characteristics and test data of gearbox bearings in different positions, the design parameters are continuously optimized, and a full transmission chain simulation model is built at the same time. The bearing design scheme is determined.
According to the application characteristics of gearbox bearings, the company has successfully established a precision-maintaining processing technology system for gearbox bearing parts through long-term process tests. Through the special control of each process of bearing processing, it has effectively ensured that the gearbox bearings can meet the long-term requirements of more than 20 years. life and high reliability requirements.
Previously, the company has successively developed 4.5 MW, 5 MW and 6.7 MW wind power gearbox bearings in the field of wind power gearbox bearings. The 8 MW-level wind power gearbox bearings rolled off the production line this time, firstly, the specifications have been upgraded, which is more suitable for the current development trend of large-scale wind turbines; secondly, a full range of supply has been realized, and the product types cover semi-direct drive and double-fed models All types of gearbox bearings, thus ensuring the comprehensive replacement of related products.
According to statistics, under the average wind speed of 7 meters per second in the installation sea area, the annual power generation of a single 8 MW wind turbine can reach 25.6 million kWh, and the annual available time can exceed 3,200 hours, which can reduce about 23,900 tons of standard coal. Reduce carbon dioxide emissions by about 90,000 tons.
"These data further demonstrate the importance of the first set of 8 MW full-range wind power gearbox bearings in China coming off the assembly line. This product is an important achievement of the company's active research around the goal of 'double carbon', and it is another major breakthrough we have achieved in technology " said Fan Yuqing, general manager of Axis Research Technology.
In the next step, Axis Technology will continue to adhere to the principle of "forging the director of the Axis Research Institute and serving the needs of the country", further increasing R&D investment, continuously improving the production capacity and testing capabilities of wind power main shaft bearings and wind power gearbox bearings, and striving to become a domestically produced wind power industry chain. make a greater contribution.