â—The domestic raw materials have been used in many different types of models and blade products suitable for different environments. All of them have passed the type test and obtained the certification certificate. The inspection time of the blade installation has reached 2000 hours.
Recently, under the support of the “Nationalization of Raw Material for Wind Turbine Blades of Megawatt Wind Turbines†in the “Eleventh Five-Year Plan†and “863†Plan, the “Localized Raw Material Wind Wheel†undertaken by Sinoma Technology Wind Power Blade Co., Ltd. Three topics, such as blade design and manufacturing technology development, passed the technical acceptance. This marks an important progress in the localization of raw materials for wind turbine blades of megawatt wind turbines. Its localization will effectively reduce the cost of the MW-class wind turbine blades, and form relevant industry standards and technical specifications, which will play an important role in promoting the development of China's wind power industry.
It is understood that the blade is one of the important components of the wind turbine, and its efficiency determines the power generation efficiency of the whole machine. The cost of blades accounts for about 20% of the total cost of wind turbines. The localization of raw materials is one of the keys to reducing the total cost of wind turbines.
In the process of researching the raw materials of MW-class wind turbine blades, R&D personnel must consider reducing the weight of the blades and meeting their strength and stiffness requirements. To this end, they developed high-performance vacuum infusion epoxy resin systems for high-efficiency high-mode E-glass fibers and multi-axial fabrics, high-performance foam sandwich materials, and epoxy structural adhesives for MW-class wind turbine blades. And new materials and technologies such as blade surface protection coatings, built a number of production lines, and realized large-scale industrial production; completed the research on blade molding process technology using integrated localized raw materials, and focused on breaking the MW-level blade structure strength analysis and Key technical difficulties such as domestic raw material evaluation are difficult. At present, the relevant domestic raw materials have been used in different specifications and models suitable for different environments, such as Sinoma Technology Wind Power Blade Co., Ltd., Goldwind Technology Co., Ltd., AVIC Huiteng Wind Power Equipment Co., Ltd., and all passed. The type test has obtained the certification and the inspection time of the blade installation has reached 2000 hours.
In recent years, due to the shortage of wind turbine blades in the domestic market and large profit margins, this industry has expanded rapidly. While many well-known foreign-funded enterprises have entered China, domestic leaf enterprises have also achieved rapid development by exerting their own advantages, and their production technologies have become increasingly mature, becoming a stable supporting supplier for wind turbine manufacturers in China. However, some large domestic blade manufacturers have obtained relevant technology to produce wind turbine blades by signing technology licensing contracts with foreign companies. Especially in the production of MW-class composite blades, most of the equipment and raw materials used by these enterprises are imported from abroad. The production technology used also comes from abroad, which makes the cost of MW-class wind turbines high, which is serious. It has hindered the development of China's wind power related industries.
At the same time, the world's wind power technology is developing in the direction of long blades and high power, which puts higher requirements on material properties. For example, carbon fiber and other technologies have begun to be applied to the manufacture of long blades. However, China's wind turbine blade industry is still in its infancy, and the technical accumulation in high-performance blade production is far from enough to meet the needs of domestic market development. Therefore, it is of great significance for China to develop and utilize wind resources and vigorously develop the wind power industry by greatly increasing investment in research and development and breaking through the bottleneck of raw material technology of wind turbine blades.
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