Segmented blade of a wind turbine

Abstract

The invention relates to a novel wind turbine segmented blade. A blade tip segment and a blade root segment are connected through a local variable pitch device, a flange and a connection piece of a connection transition segment; the blade root segment is a cylindrical rotating body structure or a rotating body structure in a similar cylinder shape, and the outer surface of the blade root segment is wrapped by a lightweight rectifying shell; and the position between the rectifying shell and the blade root segment is filled with a lightweight sandwiched material. The rectifying shell comprises afront edge extending shell structure and a rear edge extending shell structure which correspondingly wrap the front edge and the rear edge of the blade root segment, and wing shapes correspondingly lengthening the front edge and the rear edge are formed. The novel wind turbine segmented blade facilitates manufacturing, transporting and installing of blades, the production efficiency can be effectively improved, and cost is lowered.

Description

technical field [0001] The invention relates to wind turbine technology, in particular to a wind turbine segmented blade. Background technique [0002] As the demand for new energy increases, the installed capacity of a single wind turbine is gradually increasing. Wind turbine blades are the core components of wind turbines. As the capacity of the unit increases, the size of the blades also gradually increases. Judging from the current production process of blades, there are many technical bottlenecks in the production of overall large blades: on the one hand, the large-scale blades bring great difficulties in manufacturing, and the increase in blade size leads to a decrease in the load and stress at the blade root. Therefore, it is necessary to carry out structural reinforcement during the production and laying of the blades. Due to the large size of the blades, the required glass fiber layup is too thick, and the existing resin infusion process is difficult to completely i...

AI Technical Summary

Problems solved by technology

[0005] 1. The connection scheme is complicated, the reliability is poor, the cost is high, and the aerodynamic efficiency may be reduced, etc.

These problems are important reasons that limit the practical use of segmentation technology;

[0006] 2. The additional mass introduced by the connection structure at the section has adverse effects on the blade root load and the corresponding pitch bearing, and the feasibility of the section scheme is poor;

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