No. Wind turbine blades (non-transparent mirror plates) are usually made of composite materials such as glass fiber reinforced plastics. The production process of this kind of composite material is relatively complicated. Generally, it is necessary to mix glass fiber and resin and other adhesives to form a uniform shape, and then further carry out multiple processes such as mold molding and heat curing to make it have a certain strength and stiffness. leaves.
The blade diameter is not professional, it should be the sweep diameter. The mainstream 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 aircraft.
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 outer surface, and balsa wood and foam as the core. material.
The other thing is the binder. Carbon fiber 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. 3A products account for 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 may use a carbon-glass hybrid design, and the shell webs generally use glass. Fiber fabric
In addition to LM, mainstream domestic and foreign wind turbine blade manufacturers such as VESTAS, SIEMENS, GAMESA, etc. all use epoxy resin systems; LM relies on its own understanding of the interface ability between resin and fiberglass fabric, Using polyester resin, the bonding speed is fast, the post-curing process does not require heating, and the mold turnover efficiency is high;