Steps/Methods
The blade diameter is not professional, it should be the sweeping diameter. Common 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 exterior surface, and balsa wood and foam as the surface. base material. The other problem is that carbon fiber is ideal because it is stronger and lighter, but it is also problematic because it is too expensive. Balsa wood is balsa wood. As for foam, there are relatively many types, but they are generally productsts in hard foam which represent 90% of the share in this area. The main materials of wind turbine blades are fiberglass fabric and reinforced resin. Large megawatt blade spar caps can adopt a carbon-glass hybrid design, and the hull cloth generally uses fiberglass cloth. In addition to LM, the main manufacturers of wind turbine blades at home. and abroad such as VESTAS, SIEMENS, GAMESA, etc. are all epoxy resin systems; LM relies on its own understanding of the interface bonding ability between resin and fiberglass fabric to use polyester resin, which has fast bonding speed, no need for heating. the post-curing process and high efficiency of mold renewal.