Wind power blade bifurcated blade tip airbag structure, assembly method, wind power blade

Abstract

The invention provides a bifurcation type blade tip airbag structure of a wind turbine blade, a wind turbine blade comprising the structure and an assembly method. The bifurcation type blade tip airbag structure is arranged by replacing the blade tip portion of a basic wind turbine blade, so that a basic blade is effectively lengthened, and the generated output and stability of a wind generation set are improved; a blade tip airbag is set as a bifurcation structure, so that the opening and closing angle of the blade tip portion can be freely adjusted according to the wind condition of incomingflow, the stability of a blade tip vortex is ensured, and the aerodynamic load suffered by the blade tip portion is reduced; in addition, the front edge of the blade tip airbag structure is wavy, sothat the flow separation state of the blade tip is effectively improved, the aerodynamic noise of the wind turbine blade is reduced while the blade power is improved; and the trailing edge of the blade tip airbag structure is zigzag, so that the aerodynamic noise of the wind turbine blade is also reduced

Description

technical field [0001] The invention belongs to the field of blade design of a wind power generator, and relates to a blade tip structure of a wind power blade, in particular to a bifurcated blade tip airbag structure of a wind power blade and a blade with the structure. Background technique [0002] With the rapid increase of my country's wind power installed capacity, large-scale wind farms have been built in areas rich in wind resources. Machine output power drops. Wind turbines mainly rely on wind turbine blades to capture wind energy, and the length of wind turbine blades directly affects the ability of wind turbines to capture wind energy and the output power of wind turbines. Increasing the length of wind turbine blades at low wind speeds can effectively increase the power generation of wind turbines. However, as the capacity of wind turbine assembly continues to increase, the blades become more slender, and under the action of various loads such as aerodynamic force...

AI Technical Summary

Problems solved by technology

[0004] Existing blade tip extension technologies mostly simply bond a composite material shell on the basis of the existing blade structure to extend the length of the blade. Insufficient fatigue strength, discontinuity of the shear web along the span direction leads to adverse effects such as poor structural strength and stability

In addition, as the length of the blade increases, the speed of the blade tip increases, which will cause the problem of aerodynamic noise to be more significant, and most critically, the use of ordinary blade tips to extend the blade will increase the mass of the blade, making the blade bear more Large loads seriously affect the service life of the blades

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