A large wind turbine weighs between 400 and 500 tonnes.
The blades of a 6 megawatt wind turbine weigh about 70 tons, the generator rotor weighs about 100 tons, and the generator stator weighs about 140 tons. Including the weight of the cabin and tower, it is approximately 460 tonnes.
Due to the unstable air volume, the wind turbine produces 13-25V alternating current, which needs to be rectified by the charger, and then the battery is charged, so that the electrical energy generated by the wind turbine is converted into chemical energy.
Generator Structure:
Nacelle: The nacelle contains the key equipment of the wind turbine, including gearboxes and generators. Maintenance personnel can enter the nacelle through the wind turbine tower. The left end of the nacelle is the wind turbine rotor, that is, the rotor blades and shaft.
Rotor blades: capture the wind and transmit the force of thewind at the rotor axis. On a modern 600-kilowatt wind turbine, each rotor blade is about 20 meters long and designed to resemble an airplane wing.
Axis: The rotor axis is attached to the low speed shaft of the wind turbine.
Low speed shaft: The low speed shaft of the wind turbine connects the rotor axis and the gearbox. On a modern 600 kW wind turbine, the rotor turns quite slowly, around 19 to 30 rpm. There are conduits in the shaft for the hydraulic system to activate the operation of the aerodynamic brake.
The three largest manufacturers of wind turbine blades in the world are the Danish company LM, Vestas Wind Systems and the German Enercon.
In 2001, the Danish company LM invested and established a wholly-owned company in Tianjin, specializing in the production of wind turbine blades - Elm Glass Fiber Products (Tianjin) Co., Ltd., in as the first Chinese multinational. Blade manufacturer. Given theintensive development and actual demand of China's wind power market in the past two years, LM has made additional investments in the Tianjin factory. With an initial investment of 7 million US dollars and an additional investment of 18 million US dollars, the blade specification has been adjusted from the initial maximum length of 34 meters to 37 meters, which will mainly be used for assembling the future large Chinese network of 1.5 megawatts. wind turbines.
Danish Vestas Group, the world's leading wind power equipment company, has officially established a wind turbine blade production factory in Tianjin's TEDA Development Zone after studying several candidate sites. The factory has an investment of around 30 million US dollars and produces 2 MW V80 wind turbine blades with a length of 39 meters.
Enercon is a German wind turbine manufacturercomplete ennes. The large E-112 wind turbine it manufactures has a capacity of 4.5 MW, a blade length of 54 meters and a weight of 20 tons. Currently, the company also wants to enter the Chinese wind turbine and blade market. Furthermore, the Spanish company GAMESA is also an internationally renowned manufacturer of wind turbine equipment and blades. It also decided to set up a factory in China, particularly for the manufacture of blades.