1. Producing a wind turbine requires a set of gears between the blade shaft and the generator shaft to change the rotation speed. Because the general fan shaft is relatively small and the rotation speed is slow.
2. It is necessary to install a large gear plate, and then connect a small gear plate to the generator rotor shaft. Rotational speed is directly proportional to the gear size ratio. This part is the power unit. Wind turbines use kinetic energy to convert it into electrical energy. ?
3. Generator part. Finished products are available for purchase in this section. The principle of a generator is exactly opposite to that of an electric motor. One is to convert electrical energy into energy and the other is to convert electrical energy into electrical energy.
4. Simply purchase a DC generator and install the paTHE. Solar generators are not easy to make yourself. You can purchase solar batteries and assemble them to complete the vertical axis wind turbine.
Are the blades of large-scale wind turbines located in mountains fixed in one direction or do they rotate automatically with the wind?
With development du At the time, the functions of these machines and equipment have changed and are also constantly improved, with grain grinding, water transportation, electricity generation, etc. Traditional wind turbines come in various shapes and designs, but they are all currently being replaced by the same design. Wind power, as a new clean and renewable energy source, has become a popular energy source in recent years. When you walk near the wind turbine and admire the view of the wind leaves spinning quietly under the blue sky and cloudsAre you white, are you also curious to know the difference between the 3 leaves and the 5 leaves of the wind turbine?
As a new clean and renewable energy, wind energy has received great attention in recent years. When you walk near the wind turbine and admire the view of the wind leaves spinning quietly under the blue sky and white clouds, are you also curious to know the difference between the 3 leaves and the 5 leaves of the wind turbine? wind turbine ?
To put it simply, three sheets are easy to balance, but if there are too many sheets, it will be difficult to balance and the cost will be high.
At the rated wind speed, the power generated is proportional to the swept area of the wind rotor, i.e. a wind rotor with 200 blades and a wind rotor with 1 blade can produce the same power.
The figure above shows that as the number of blades increases, the duty cycleation of wind power also increases, but in the process from 3 blades to 4 blades to 5 blades, the wind power utilization coefficient increases significantly, compared with the increase from 1 leaf to 2 leaves to 3 leaves, the increase is much smaller from a cost perspective, the gain exceeds the loss.
So, the fewer blades a wind turbine has, the better?
First of all, the advantage of multi-blade fans is the higher torque conversion rate, but in terms of energy conversion rate, the efficiency of 4-blade and 5-blade fans is lower than that of 3-blade fans. blade fans.
The main reason is that the high resistance of multi-blade fans causes a considerable amount of turbulence which interferes with the rotation of the blades, thereby reducing the energy conversion rate.
It is therefore much better to choose 3 sheets than 4 or 5 sheets. (Well, it's the samee for electric fans); Second, an insufficient number of blades will affect the efficiency of power generation.
In fact, there is currently a patent in Europe that has two leaves, placed vertically, which can double the effectiveness! However, the 2-blade hub has a special structure. With a rocker structure, the fatigue problem is also worse than with 3 blades.
In addition, the fewer blades, the higher the rated speed. When the speed is high to a certain extent, the circumferential linear speed of the blade tip is very large, causing large wind resistance. a further increase in energy production and speed. Therefore, it is not good to have too few blades. Three blades are mainly for good balance and low cost. After a long period of verification, they have become a form of court fanante today.
In order to allow the turbine to naturally align with the direction of the wind, wind turbines generally use steering devices. For large wind turbines, motor-driven wind direction tracking systems are typically used. The entire yaw system consists of a motor and reduction mechanism, a yaw adjustment system and a twisted cable protection device. The yaw adjustment system includes a wind vane and yaw system adjustment software. The weather vane has a pulse output signal corresponding to each wind direction. Its yaw direction and yaw angle are determined through the yaw system software, then the yaw signal is amplified and transmitted to the motor, and the wind turbine platform rotates. the deceleration mechanism until it is aligned with the wind direction.