Wind driven generator and combined blade thereof

Abstract

The invention discloses a combined blade which comprises a center framework and multiple skins. The center framework comprises main beams and multiple rib rings arranged at intervals. The main beams penetrate center holes of the rib rings and are fixedly connected with the rib rings. The shape of the rib rings is matched with that of the section of the combined blade. The skins are fixed to the surface of the center framework, and therefore the contour of the combined blade is defined. Compared with the prior art, the combined blade has the following beneficial effects that in the manufacturing process, the main beams, the rib rings and the skins can be manufactured separately, so that the requirement for dies are lowered; in addition, in the transportation process, the combined blade can be disassembled into multiple parts to be independently transported, and therefore the manufacturing cost and the transportation cost of a wind driven generator can be reduced through the adoption of the combined blade of the structure; and on the basis, the invention further provides the wind driven generator with the combined blade.

Description

technical field [0001] The invention relates to a wind power generator manufacturing technology, in particular to a wind power generator and its combined blades. Background technique [0002] With the depletion of traditional petrochemical energy and the increasingly stringent environmental protection, wind power has become one of the important sources of energy. [0003] The wind turbine is the main equipment for wind power generation. It usually includes three important parts: the tower, the nacelle (also known as the tower head) and the blades. Components, the blades are connected to the transmission part, and the transmission part is connected to the input shaft of the generator; during operation, the wind drives the blades to rotate, and the transmission part speeds up the rotational motion input by the blades and then transmits it to the generator, and the generator converts kinetic energy It is electrical energy and output to the grid through the circuit. [0004] I...

AI Technical Summary

Problems solved by technology

[0004] In order to improve power generation efficiency, the power of a single wind turbine is getting higher and higher. Correspondingly, in order to capture enough wind energy to drive the generator, the length and weight of the blades are also increasing; for example, a 5 megawatt wind turbine , whose blades are more than 50 meters long; during the production and installation of wind turbines, it is inevitable to transfer the blades to different sites; however, so far, the transportation of blades is still a A difficult and risky part

In addition, the manufacture of blades requires special molds, and the cost of manufacturing large-scale, high-precision molds is relatively high, resulting in high production costs for large-scale wind turbines

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