Blade stretching structure for wind driven generator

Abstract

The invention discloses a blade stretching structure for a wind driven generator. The blade structure is a stretching structure; a port of a first blade section, connected with a second blade section, is provided with a cross section with four sections of foldable blades; the four sections of foldable blades are connected with a steel longitudinal beam through elastic hinges; simultaneously, contact surfaces among the four sections of foldable blades and contact surfaces between the four sections of foldable blades and the second blade section are slope-shaped; the steel longitudinal beam is arranged inside the first blade section and two screw rod holes are formed inside the first blade section; and one end of a screw rod is connected with the screw rod holes inside the first blade section, and the other end of the screw rod is connected with the tail end of the second blade section, namely, a motor on a blade root, through a gear. Energy capture of a wind wheel can be reduced so as to keep power output close to a rated value. Simultaneously, load borne by the blade and impact on the entire wind machine are reduced and the wind machine is prevented from being damaged due to stall. The structure can automatically adjust the windward area of the blade so as to enlarge economical wind speed range of the wind driven generator and make full use of wind energy.

Description

technical field [0001] The present invention relates to the technical field of wind power generation equipment, in particular to a wind power generator blade structure. Background technique [0002] With the requirement of human beings for the ecological environment and the need for energy, the development and development of wind energy has been paid more and more attention. Wind power will become a renewable and clean energy developed on a large scale in the 21st century. As a kind of renewable energy, wind energy has abundant reserves in China. With the continuous improvement of people's understanding of wind power generation and the continuous maturity of small wind power generation technology, its application fields are becoming more and more extensive. [0003] A wind turbine is a power generation device that uses wind energy in nature to convert it into electrical energy. The wind turbine works within a certain range of wind speed. In many cases, it is required that ...

AI Technical Summary

Problems solved by technology

Although the stall adjustment is simple in structure and easy to maintain, the engine room is heavy, difficult to transport and hoist, the foundation is large, and the cost is high; The system structure of distance is complex, the failure rate is slightly high, and the requirements for the quality of operation and management personnel are high

Images