A modular wind turbine blade chordwise block connection structure

Abstract

The invention relates to the technical field of wind power blades, in particular to a modular wind power blade chordwise block connection structure, the blade body includes a windward surface and a leeward surface; The main spar caps are provided on both the windward side and the leeward side of the blade body and the trailing edge shell; the shear webs arranged inside the cavity of the blade body extend between the windward and leeward sides to support the main beam Caps; among them, the main spar caps located on the windward and leeward sides are bonded and fixed to the skin structure at the joint of the leading edge shell and the trailing edge shell, so that the leading edge shell and the trailing edge shell are spliced ​​with the main spar caps Form the outline of wind turbine blades. Compared with the existing connection form, the bonding structure at the skin structure in the present invention overcomes the disadvantages of mechanical connection and hybrid connection, achieves the purpose of reducing the weight and cost of the blade, and satisfies the sealing requirements required by the wind power blade structure Therefore, it is of great significance to accelerate the development of my country's wind power industry.

Description

technical field [0001] The invention relates to the technical field of wind power blades, in particular to a chordwise block connection structure of a modular wind power blade. Background technique [0002] Wind power blades are the basic elements of wind turbines to convert wind energy into electrical energy. The blades have the cross-sectional profile of an airfoil. During operation, the air flowing through the blades creates a pressure difference between the two sides of the blades, so lift from the pressure side to the suction side acts on the blades, and the lift forces on the main rotor. The shaft produces torque, where the main rotor shaft is geared to a generator that can generate electricity. [0003] In order to make full use of wind energy resources, wind turbines are 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 less travel, and poor t...

AI Technical Summary

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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