1. Wooden blades and cloth-skinned blades
Near-micro and small wind turbines also use wooden blades, but wooden blades are not easy to be twisted.
2. Steel beam glass fiber skinned blades
In modern times, the blade adopts steel pipe or D-shaped steel as the longitudinal beam, steel plate as the rib beam, and the structure of foam plastic and glass fiber reinforced plastic skin. It is generally used in large wind turbines.
3. Aluminum alloy blades with equal chord length extruded
The equal chord blades extruded from aluminum alloy are easy to manufacture, can be connected to production, and can be twisted according to the design requirements. The shaft and flange connecting the blade root and the hub can be realized by welding or bolting.
4. FRP blades
FRP reinforced plastic has high strength, light weight, and aging resistance. The surface can be wrapped with glass fiber and epoxy resin, and the other parts are filled with foam. The main function of foam in the blade is to reduce the quality of the blade while ensuring its stability, so that the blade can increase the wind catching area while satisfying the rigidity.
5. Carbon fiber composite blade
The stiffness of the carbon fiber composite blade is two to three times that of the fiberglass composite blade. Although the performance of carbon fiber composite material is much better than that of glass fiber composite material, it is expensive, which affects its large-scale application in wind power generation. Therefore, the world’s major composite materials companies are conducting in-depth research on raw materials, process technology, quality control and other aspects in order to reduce costs.
Post time: Dec-31-2021
