Modular wind power blade chordwise block connecting structure

Abstract

The invention relates to the technical field of wind power blades, in particular to a modular wind power blade chordwise block connecting structure. A blade body comprises a windward side and a leeward side as well as a front edge shell and a rear edge shell, wherein the front edge shell and the rear edge shell are formed by skins of the windward side and the leeward side in the chord length direction of the blade, and main beam caps are arranged on one side of the windward side and one side of the leeward side; a shear web arranged in a cavity of the blade body extends between the windward side and the leeward side and is used for supporting the main beam cap; and the main beam caps located on the windward side and the leeward side are fixed to the skin structure at the splicing position of the front edge shell and the rear edge shell in a bonded mode, so that the front edge shell, the rear edge shell and the main beam caps are spliced to form the wind power blade contour. According to the modular wind power blade chordwise block connecting structure, compared with an existing connection mode, the bonding structure on the skin structure has the advantages that the defects of mechanical connection and mixed connection are overcome, the purposes of reducing the weight of the blade and reducing the cost are achieved, the sealing requirement needed by the wind power blade structure is met, and therefore, the wind power blade structure has important significance on acceleration of development of the wind power industry in China.

Description

Technical field [0001] The present invention relates to the field of wind power blades, and more particularly to a modular wind power blade string to block connecting structures. Background technique [0002] Wind power blades are the basic components that wind generators convert wind energy into electrical energy. The vanes have a cross-sectional profile of the wing. During the operation, the air flowing through the blade generates a pressure difference between its sides, so the lift from the pressure side to the suction side can act on the blade, and the lift will be mainly rotor The shaft produces torque, wherein the main rotor shaft is coupled to a generator that can be powered by a gear. [0003] In order to make full use of wind energy resources, wind turbines have gradually moved to large, and their lengths are also increasing, and the region where wind resources is often part of some remote areas, desert, sea or seaside and other regions, and traffic conditions. The trans...

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Problems solved by technology

[0003] In order to make full use of wind energy resources, wind turbines are also gradually becoming larger, and the length of their blades is also increasing. The areas rich in wind resources are often remote areas, desert areas, sea or seaside areas with poor traffic conditions. It is quite difficult to transport long blades. At present, some wind power blades are segmented along the length direction. However, as wind power blades become larger and larger today, wind power blades are also getting thicker and thicker. It is no longer possible to only segment the length direction Meet the transportation conditions

[0004] Existing modular wind power blades, several segments arranged along the length direction, each segment is provided with a leading edge piece, a middle piece and a rear element in the width direction of the wind power blade, a leading edge piece and a middle piece, a middle piece and a trailing edge There is a splicing surface and a connection structure between the parts, and the connection structure passes through the splicing surface for mechanical fixed connection / or hybrid connection combined with glue, but while the mechanical connection and hybrid connection involve metal connections to increase the weight, the lightning protection design should be considered It will also inevitably increase the cost other than the connection. In addition, when the blade block meets the structural design requirements, it cannot meet the sealing requirements.

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