Approximately 7 meters.
According to the Road Machinery Network, the height and diameter of the large pillars of wind turbines for electricity generation are different. The pillars of the 72 meter high wind turbines have a diameter of up to 1,000 meters. 7 meters away.
The wind tower is the pole of the wind power generation tower.
A large wind turbine has several dimensions
In fact, there are single-blade and two-blade wind turbines. But the most common number of blades in modern wind turbines is three, the result of compromises between various aspects and parameters during the design process. These aspects include, but are not limited to: aerodynamics, energy conversion efficiency, manufacturing and maintenance costs, system reliability, noise and aesthetics. From a simple analysis of technical parameters, a larger number of blades can:
(1) Increase mechanical torque;
(2) Increase the output power;
(3) Reduce the maximum rotation speed;
(4) Increase manufacturing costs and make maintenance more complicated and difficult. Therefore, motors with a large number of blades are more suitable for operation in low-speed locations, such as water pumps and grain grinding motors. Wind turbines expect the blades to rotate at a relatively high speed, so the size of the generator located in the center of the blades (at the top of the tower) does not need to be large to meet the requirements of network frequency. Additionally, wind speeds generally increase at higher altitudes. As the wind turbine tower is very high, the blades are also very long (40m-60m*). There is a significant difference in wind speed between blades rotating to a high position and blades rotating to a low position. If the generator only hase two blades, then when the blades rotate, one in the high position and one in the low position, their stress is obviously not uniform enough, so a stronger and more stable tower must be designed to hold the generator and blades. The three-blade generator can alleviate this imbalance to some extent, making it run more smoothly. Smooth means less noise and less wear.
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 wind force to the rotor shaft. On a modern 600 kW wind turbine, each rotor blade is about 20 meters long, and designed to look like 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.