31 七 10 Wind turbine blade material
Wind turbine blade is the most basic and most critical component, its good design, reliable quality and superior performance is to ensure normal and stable operation of unit determinant. Harsh environment and long-term keep running, the requirements of the blade are: light weight and has the best mechanical properties and fatigue strength to withstand storms and other extreme conditions and random load tests; leaves flexibility, rotation inertia Its vibration frequency characteristic curves of the normal, passing the burden to the entire power system stability; anti-corrosion, ultraviolet radiation and lightning performance;wind generators low cost, low maintenance costs.
According to international consulting firm UtiliPoint Bob Bellemare, president, said: For the wind power generator, the carbon fiber is the coming trend. Generally smaller leaves (such as the 22m long) use large inexpensive E-glass fiber reinforced plastic, resin to unsaturated polyester matrix-based, and vinyl ester or epoxy resin can be used, while larger leaves (eg 42m and above) generally use CF and GF CFRP or hybrid composite materials, epoxy-based resin matrix. GE Wind Energy leaves the project, said the global manager Ramesh Gopalakrishnan, designers are looking for high-strength lightweight materials in the process of selection of the carbon fiber used in blade design
With the stand-alone small wind turbines increases, the required length of leaves growing in the application of wind power will also be expanded. Leaves in terms of stiffness is also an important indicator. The results show that carbon fiber (carbon fiber, called CF) is a composite blade stiffness FRP blades two to three times. Although carbon fiber composites are superior to glass fiber composites, but expensive, affecting its large-scale wind turbine generator applications. Therefore, the world’s major companies are from composite materials, technology, quality control and other aspects of in-depth study in order to reduce costs.
Tags: Wind turbine blade
