400 to 500 tonnes.
A large, energy-efficient power generation wind turbine weighs between 400 and 500 tons. 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 weighs approximately 460 tonnes. .
A wind turbine is an electrical machine that does not require fuel and uses wind as energy. The first wind turbines were also called modern wind turbines. They mainly refer to wind turbines for electricity generation and are also used to lift water. for irrigation.
How long does it take to replace fan blades on a wind turbine?
A large wind turbine weighs between 400 and 500 tons.
The blades of a 6 megawatt wind turbine weigh around 70 tonnes, the generator rotor weighs around 100 tonnes and the stator of the generator weighs approximately 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-kilowatt wind turbine, each rotor blade is about 20 meters long and designed to resemble an airplane wing.
Axe: The axe of the rotor is fixed 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.
20 years.
The wind turbine blade is a thin-shell structure made of composite materials. The structure is divided into three parts: root, shell and keel. There are many types, including pointed head, flat head, hook head, pointed head with flaps, etc. The manufacturing process mainly includes male mold, female mold turning, rolling, heating and curing, demolding, surface grinding, spray painting, etc. Design difficulties include the aerodynamic design of the d-shapee blade, strength, fatigue, noise design and composite material overlay design. The technical difficulties mainly include mold positive processing, mold recasting and resin system selection. The blade is a large composite material structure, and more than 90% of its weight is composed of composite materials. Each generator typically has three blades, and each generator requires up to four tons of composite materials.
Blade maintenance. Cracks on the blade surface will generally appear after 2-3 years of wind turbine operation. Cracks are caused by low temperatures and natural vibrations of the unit. If crackedThe cracks appear 8-15 meters from the root of the blade. Every time the wind turbine vibrates or stops, the cracks deepen and lengthen. As the cracks widen, dirt, wind and sand presentin the air penetrate, causing the cracks to deepen and widen. Cracks seriously threaten the safety of the blades and can cause cracking, while transverse cracks can cause the blades to break. In case of transverse cracks, reinforcement and restoration of the zipper should be used. Reinforcing and restoring the zipper requires the use of special tie bars to bond and repair the blade to its original plane.