The application of composite materials in wind power generation is mainly the manufacturing of rotor blades, nacelle covers and fairings. Relatively speaking, the technical threshold for nacelles and fairings is low, and production and development are not difficult. The wind turbine rotor blade is one of the key components of the wind turbine. Its design, materials and technology determine the performance and power of the wind power generation device. In the history of more than 100 years since the rise of wind turbines, blade materials have gone through wooden blades, cloth-covered blades, aluminum alloy blades, etc. With the emergence of networked wind turbines, wind power has entered a period of rapid development. Some properties of blades made of traditional materials cannot meet the requirements when used on increasingly large-scale wind turbines. Therefore, composite material blades with high specific strength have been developed. stand up. Now, almost all commercial-grade blades are made of composite materials, and wind turbine blades have become one of the important application areas of composite materials.
Method:
A method for improving the root layer of wind turbine blades, which is characterized by including the following steps:
a. Blade root prefabricated mold and spreading the cloth; take a blade root prefabricated mold, and the blade root prefabricated mold includes a blade root prefabricated mold bracket
(1) A semicircular arc-shaped outer shell installed on the blade root prefabricated mold bracket (1) Surface
(2) Root prefabricated mold turning arm
(3) and the turning arm locking hand wheel of the root prefabricated mold turning arm (3)
< p>(4) The precast mold universal wheel installed under the root precast mold bracket (1)(5) Used to tighten the G-shaped clamping of the semi-circular arc outer surface (2) and the glass cloth The diameter of the semicircular arc-shaped outer surface (2) described in device
(6) is the value obtained by subtracting the blade root mold diameter from the blade root glass cloth layer thickness, and the glass fiber cloth
< p>(7) is laid on the semi-circular arc-shaped outer surface (2) of the prefabricated mold at the blade root in reverse order. The fiberglass cloth (7) naturally droops under its own gravity and is laid smoothly and naturally on the semi-circular arc-shaped outer surface. on the surface (2), and then use the G-shaped clamping device (6) to clamp the fiberglass cloth (7) on the blade root prefabricated mold;b. Lay the blade mold fiberglass cloth to the skin and fiberglass cloth
(8) are laid in the arc shape of the concave arc-shaped blade root mold (9), and local areas are fixed with glue to fix the position of the fiberglass cloth (8) to ensure that the fiberglass cloth The cloth (8) is accurately positioned, flat and wrinkle-free;
c. Turn over the prefabricated mold at the blade root and hoist the hanging chain
(10) to the shackle
(11) Connect to the turning arm (3) of the root prefabricated mold, and use a suspender
(12) to connect the blade root prefabricated mold and the glass fiber laid on the semicircular arc outer surface (2) Lift the cloth (7) together, loosen the locking hand wheel (4) of the turning arm (4), so that the turning arm (3) can rotate freely, and place the root prefabricated mold and the glass laid on the semicircular arc-shaped outer surface (2). After the fiber cloth (7) is turned 180° together, againLock the locking handwheel (4) and place the flipped root prefabricated mold and the fiberglass cloth (7) laid on the semi-circular arc outer surface (2) smoothly into the concave arc blade root mold (9) , then loosen the G-shaped clamping device (6), place the fiberglass cloth (7) flatly in the concave arc blade root mold (9), and then lift the blade root prefabricated mold away from the blade root mold (9) ;
d. Fixing of fiberglass cloth (7) Place the fiberglass cloth (7) in the concave arc blade root mold (9), and place the fiberglass cloth (7) every 6 to 8 layers (7) Make a flange on the flange (13) on both sides of the blade root mold (9), and use double-sided tape to bond the flange to the mold flange (13) to achieve the fiberglass cloth (7) Fixing in the blade root mold (9):
e. Seal the vacuum and perform infusion molding. Lay the diversion system as a whole on the blade root mold (9), and then remove the glass fiber in the blade root mold (9). Seal the vacuum film. After evacuating the vacuum film, inject resin into the guide system through the injection hole so that the fiberglass cloth is saturated with resin. After the resin injection is completed, heat and solidify the resin to form.