Multi-girder structure large size wind power blade and production method thereof

Abstract

The invention discloses a multi-girder structure large size wind power blade and a production method thereof. The multi-girder structure large size wind power blade is in a hollow layout structure, and comprises a blade envelope suction edge, a blade envelope pressure edge, main load-carrying construction girders and shearing-resistant web plates, wherein the blade envelope suction edge and the blade envelope pressure edge are combined to form a cavity structure of which the cross section is streamlined; a supporting structure formed by the main load-carrying construction girders and the shearing-resistant web plates is arranged in the cavity structure formed by the blade envelope suction edge and the blade envelope pressure edge; and the blade envelope suction edge and blade envelope pressure edge are in multisection combination structures, and are connected with the side surfaces of the main load-carrying construction girders through a plurality of edge sections respectively to form a blade envelope suction edge and blade envelope pressure edge integrated body. On the premise of ensuring the rigidity and strength of the blade, the resistance to buckling instability of the blade is improved; and by adopting a high-module carbon fiber spread layer, the weight of the blade can be reduced obviously, and loads, particularly a fatigue load, of the blade are reduced.

Description

technical field [0001] The present invention relates to a component of wind power generation equipment and an improvement of its manufacturing method, in particular to a manufacturing method of a large-sized and elongated wind power blade and the improvement of the wind power blade. It belongs to the technical field of wind power equipment. Background technique [0002] As we all know, wind power blades are developing towards large size. Even when the power generation remains unchanged, the size of the blades is constantly increasing and lengthening. As the size of the blade changes, the blade becomes more slender and softer. In order to meet the requirements of rigidity, strength and stability, it is necessary to increase the structural layup, especially the layup near the tip of the blade. This will inevitably lead to an increase in the weight of the blade, and the center of mass is closer to the blade. At the same time, as the weight increases, the fatigue load will also...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a method that can effectively reduce the weight of the blade in view of the structural safety and high cost of the existing large-size and elongated blades, so as to increase the frequency of the blade and reduce the load on the blade. Large-size, elongated wind power blade capable of reducing production cost and manufacturing method thereof

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