Blade of horizontal axis WTGS and forming method and equipment thereof

Abstract

The invention discloses a composite blade of a horizontal axis WTGS (wind turbine generator system). A pneumatic functional part and a bearing structure part of the blade are separated from each other according to the design, particularly, external longitudinal beams are distributed on a front side surface and a rear side surface of the section surface of a pneumatic wing section and keep enough pneumatic clearance distances from the pneumatic wing section, and a section of truss structure is introduced at a blade stalk part of the blade, therefore, on the premise of guaranteeing the pneumatic power, the blade manufacture cost and transportation cost can be greatly lowered in comparison with the prior art. A horizontal axis fan formed on the basis of the pultrusion technology enhances the resin composite blade through using uniform-section fibers, a casing of the blade is divided into a stressed-skin construction layer and a core material construction layer which bear blade horizontal and longitudinal loads respectively, the core material part is made of preformed continuous-pultrusion sectional material, and the stressed-skin part is finished in the second pultrusion process. The method for manufacturing the full fiber composite blade by adopting the second pultrusion technology gives full play to the blade structure, material performance and technology advantages reasonably.

Description

Technical field: [0001] The invention relates to a composite material blade of a horizontal axis wind power generating set. The aerodynamic function part and the bearing structure part of the blade are designed separately from each other. There is sufficient aerodynamic clearance distance between the aerodynamic airfoil and the external beam, and at the same time, a truss structure is introduced into the petiole part of the blade. In this way, under the premise of ensuring aerodynamic power, the bending stiffness of the blade is greatly improved. Compared with the existing blade technology The total cost of the blade can be greatly reduced. At the same time, the present invention proposes a method and pultrusion equipment for secondary pultrusion molding of the fiber reinforced resin composite material blade. [0002] The invention belongs to the technical field of composite blades of horizontal axis wind power generators. Background technique: [0003] Composite material ...

AI Technical Summary

Problems solved by technology

[0005] Because the blade has a sufficiently large aerodynamic profile section, the solid part of the aerodynamic airfoil has good longitudinal compressive stability, and the load-bearing structure outside the aerodynamic airfoil profile should not be too large, otherwise, it will affect the aerodynamic performance of the airfoil Will be larger at the expense of aerodynamic efficiency

However, thin beams are very stable in tension and poor in compression

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