Third, the characteristics of wind turbines
Wind is a kind of random energy. We have to use wind energy to generate electricity and capture wind energy. Wind energy can be infinitely large. Under this characteristic, even if the speed limit is not used, even a good fan will be damaged. Fans are now generally used for power generation, all in the 3M/S~60M/S output space.
The following speed limiting devices are generally used:
(1) Slurry distance (centrifugal pitch)
This is the more advanced blade control method. When the wind comes, the blades are shaped to form a resistance, so that most of the wind energy is consumed at the tip of the blade, limiting the energy output.
(2) Folding tail
(3) The nose of the nose (or the upper side): When the wind is strong, push up and avoid the wind.
All of the above three blade control methods have the disadvantages of poor reliability and easy wear of fan related components.
(4) Stall blades
The stall blades were originally large wind turbines used to set the pitch.
The blades of the HY series fans adopt the stall blades made of nylon material made of high temperature and high pressure, which are free from the traditional speed limit mode and control the mechanical power from the aerodynamic point of view.
Defects. The special structure of the blade leaf type makes it use the negative force of the blade tip to limit the blade rotation speed when the wind is large. The faster the tip speed, the stronger the negative pressure and high frequency vibration generated, and the flexible leaf
The film is capable of decomposing high frequency vibrations to prevent damage to the tip. At the same time, the electromagnetic brake is used, which is faster than the mechanical brake stoppage, and the fan can be stopped in about 3~6 seconds. CP value drops, no
Current output.
Electromagnetic brake + stall control = anti-wind protection
