The blade diameter is not professional, it should be the sweeping diameter. Common blade shapes are 126/110/114, etc., and the corresponding blade sizes are 68m, 54m and 56m; now the diameter of the largest wind turbine blade has exceeded 70 meters, which is equivalent to the wingspan of a Boeing; plane.
When it comes to materials, it's more complicated. Different parts of the blade have different materials. Generally speaking, three categories are used, carbon fiber and fiberglass as the exterior surface, and balsa wood and foam as the surface. base material.
The other thing is that carbon fiber binder is ideal because it has better strength and is lighter, but it is also a problem because it is too expensive. Balsa wood is balsa wood. As for foam, there are relatively many types, but they are generally hard foam products which representntent 90% of the share in this area.
The main materials of wind turbine blades are fiberglass fabrics and reinforced resins.
Large megawatt blade spar caps can use a carbon-glass hybrid design, and hull cores typically use glass. . Fiber fabric
In addition to LM, domestic and foreign large wind turbine blade manufacturers such as VESTAS, SIEMENS, GAMESA, etc. all use epoxy resin systems; resin and fiberglass fabric, using polyester resin, the bonding speed is fast, the post-curing process does not require heating, and the mold rotation efficiency is high;
The blade of a wind turbine can measure up to 80 meters long.
The largest wind turbine in the world is located in Maade, Denmark. It is called V164 and was manufactured and installed by Mitsubishi Vestas Offshore Wind Company. Thiswind turbine is 220 meters high (blade length included), with three giant blades installed on it. Each blade is 80 meters long, which is longer than a Boeing 747. In addition to being the largest, it is also the most powerful wind turbine in the world, under normal circumstances it can produce 260 000 kWh of electricity in 24 hours, enough to meet the electricity consumption of hundreds of homes for a month.
A wind turbine is an electrical device that converts wind energy into mechanical work, which causes the rotor to rotate and ultimately produces alternating current. Wind turbines generally consist of components such as a wind wheel, generator, steering, tower, speed limiting safety mechanism and energy storage device. The operating principle of a wind turbine is relatively simple. Wind action. The kinetic energy of the wind is converted into mechanical energyue of the wind rotor shaft, and the generator rotates under the drive of the wind rotor shaft to generate electricity.
Principle of the wind turbine
It is an electrical device that converts wind energy into mechanical energy and mechanical energy into electrical energy. Generally speaking, it is a thermal energy engine that uses the sun as the heat source and the atmosphere as the working fluid. Wind power generation uses natural energy, which is much better than diesel power generation. But if used in an emergency, it is still not as efficient as a diesel generator. Wind power is not considered a backup energy source, but it can be used long term.
The principle of wind power generation is to use wind energy to rotate the blades of the windmill, and then use the increase in speedsse to turn the blades. The speed is increased to encourage the generator to produce electricity. According to current wind turbine technology, electricity production can start at a breeze speed of around three meters per second (the breeze level). Wind energy is becoming a craze around the world because it poses no fuel problems and does not produce radiation or air pollution.