Main bearing beam for large wind power blades, hybrid spar composite wind power blades and preparation method thereof

Abstract

The invention discloses a main bearing beam for a large wind power blade. The main bearing beam is a carbon fiber / glass fiber mixed composite material round bar sectional material combined body, and the combined body is formed through beam bunching and sizing of a plurality of carbon fiber / glass fiber mixed composite material round bar sectional materials via glass fiber felt or yarn. According tothe main bearing beam for the large wind power blade, the combined body is formed through beam bunching of the carbon fiber / glass fiber mixed composite material round bar sectional materials, complementation of carbon fiber performance and glass fiber performance is sufficiently utilized, the beneficial effects of high elasticity and lightness of carbon fiber are brought into sufficient play, therigidity and strength of the main bearing beam are greatly improved, and the critical length of the main bearing beam is increased; meanwhile, the price is greatly reduced compared with the cost of adoption of pure carbon fiber serving as reinforcing materials, and popularization and application of the carbon fiber to the field of the main bearing beam and the wind power blade are better facilitated. The invention further correspondingly provides a mixed spar composite material wind power blade and a preparing method of the mixed spar composite material wind power blade.

Description

technical field [0001] The invention belongs to the field of wind power blade preparation, and in particular relates to a main bearing beam for a large wind power blade, a hybrid spar composite wind power blade and a preparation method thereof. Background technique [0002] With the improvement of wind turbine blade design technology, large-scale and lightweight has become an important trend in the development of composite wind turbine blades. At present, large-scale composite wind turbine blades mainly use glass fiber as a reinforcing material. However, the development of large-scale blades requires higher and higher strength and stiffness of blades, and the length and self-weight of blades are also increasing, so that glass fiber composite materials cannot bear it. Based on the requirements of large-scale development of blades, light weight and high strength, can effectively increase the critical length of blades, and ensure that the blade tips of the blades do not touch t...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies and defects mentioned in the background technology above, and to provide a main load-bearing beam for wind turbine blades that integrates the properties of carbon fiber and glass fiber, with light weight, extended critical length, and excellent mechanical properties. The excellent large-scale hybrid spar composite wind power blade also provides a preparation method of the composite wind power blade with simple process, strong adaptability and low cost, so as to solve the problem of incomplete or direct carbon fiber impregnation inside the wind power blade in the prior art. Problems with impregnation failure

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