Blade structure for H type vertical axis wind turbine

Abstract

The invention relates to a blade structure for an H type vertical axis wind turbine. The blade structure is used for improving the utilization rate of wind energy and the low wind-speed starting performance of the wind turbine. The blade structure is composed of a group of blades vertically arranged on the periphery of a rotation spindle and is characterize din that the cross section contour of each of the blades is formed by six curved lines, including O-S, O-T, S-Q, Q-P, P-R and T-R. Coordinate points of the curved lines are given, and the cross section contours of the blades are obtained by connecting the coordinate points through smooth curved lines. By means of the blade structure, the wind resistance of the wind turbine can be improved apparently, the wind resistance difference is increased, and particularly, the power generation capacity of the wind turbine under the lower wind speed is greatly improved. A contrast test shows that under the condition that other structures of the wind turbine are similar to structures of other wind turbines, the generating voltage during low wind speed can be improved by more than 10 times and the generating voltage during medium and high wind speed is improved by about 2 times by means of the blades.

Description

technical field [0001] The invention relates to a wind power generating device, in particular to a blade used for an H-type vertical axis wind power generator, and belongs to the technical field of wind power generation. Background technique [0002] With the rapid development of industrial technology, the problem of global energy crisis has become increasingly prominent, and the development and use of green energy such as wind energy and solar energy has increasingly shown its important role. According to the installation orientation of the main shaft, wind turbines are divided into horizontal axis and vertical axis. Traditional wind turbine structures are mostly horizontal axis wind turbines. In recent years, vertical axis generator technology has developed rapidly and its application has become increasingly widespread. The vertical axis generator can increase the wind resistance and improve the wind resistance difference through the optimized design of the blade structur...

AI Technical Summary

Problems solved by technology

At present, H-type vertical axis wind turbines have problems such as poor power generation performance at low wind speeds, and low utilization efficiency of drag-type wind energy. Therefore, optimizing the blade airfoil structure is the key to solving the above problems.

Images