The blade shape and angle of attack are different.
Wind power generation must have a suitable angle of attack that can convert the energy of the wind flow.
Although the helicopter also needs to have a suitable angle of attack, it can still obtain lift when the angle of attack is 9. Its blade profile can generate an upper and lower pressure difference under high-speed operation.
The stiffness requirements of wind motors on materials will be much higher than those of helicopters.
What is the windmill in this photo used for? Wind power generation?
How does this 200-meter-high wind turbine convert majestic wind into millions of watts of electricity?
First, the windshield turns the propeller, and the rotor inside the tower top turns the drive shaft. The drive shaft is connected to a gearbox, thereby turning the generator to generate electricity. It is not easy to build such a wind turbine. It starts with the propeller. The difficulty of making a propeller lies in the fact that each blade has a curved surface like an airplane. When the wind blows over the blades, it will generate upward force, causing the propeller to rotate. Moreover, it must be long enough and light enough. Therefore, all blades are built from a piece of carbon fiber. Carbon fiber is stronger and lighter than steel, and can make longer blades.
Second, use fiberglass to make an aerodynamic handout shell. First vacuum-pack the fiberglass sheets, and then bake them in this cylindrical oven to form two halves of a perfectly seamless shell. . Anxious to join the two halves of the handout together, the workers first applied a layer of glue to the inside of the bottom of the shell, and also applied it to the top of the carbon fiber one and two, and then carefully dropped the huge 55-meter-long car into the correct position. After the blade is installed in place, the blade needs to be baked again to allow the adhesive to change. After baking, take out the combined handout. At this time, the surface of the blade is not smooth enough, and it needs to be polished with a sand mill. It takes about ten hours to polish each blade to complete.
Third, in nature, the greatest threat to wind turbines is lightning. If lightning hits a hollow propeller, it will quickly heat the internal air and cause it to expand, causing the blade to collapse. In order to prevent being struck by lightning, engineers will install copper bridges on the tips of the blades. This allows the lightning to conduct current to the base of the blade and then to the ground, allowing the lightning to bypass the footprint and protect important components of the generator. Next, we began to install the mini power plant on the wind turbine. This is called the nacelle, which is the core of the generator. The huge reward can generate a lot of torsional force, but it only rotates 30 times per minute. Such a slow speed cannot produce electricity, so The gearbox in the generator converts the low-speed and high-torque rotation of the blades into high-speed torque through the drive shaft. The drive shaft drives the rotating magnet inside the generator. When the magnet rotates, an electromagnetic field is formed, thereby generating electric current.
Fourth, such a generator can generate 3.5 million watts of electricity, enough to supply more than 3,000 households. Each time the magnet rotates, the anode and cathode swap, creating an alternating current. The frequency of cathode and anode exchange depends on the custom of the rotating propeller, but the power grid requires a stable frequencyTherefore, this converter must be installed in the cabin, which can convert the alternating current generated by different wind speeds into a stable frequency and send it to the power grid. The assembled cabin weighs 85 tons, which is larger than a double-decker bus. It and other rectangular parts need to be transported in batches by truck, and it takes three days to assemble after arriving at the installation site. Once assembled, these giant wind turbines can provide the city with the electricity it needs.
It is used to generate electricity
Because this is my major
I don’t know how old you are
To put it simply
It uses the principle of energy conversion. The wind can drive the upper blades to rotate, which will generate kinetic energy. The kinetic energy can be converted into electricity using equipment.
The Three Gorges Dam uses water energy to generate electricity. The huge drop of water can drive propellers and other things below to rotate, and then convert this kinetic energy into electricity.
I don’t know how to put it this way, do you understand?
Is it abandoned?
But in China, this is not unusual at all. Many things are not based on use value. As long as the leader likes it....