A drag type wind wheel for a vertical-axis wind-driven generator

Abstract

The invention relates to a drag type wind wheel for a vertical-axis wind-driven generator and relates to the technical field of wind power generation. The drag type wind wheel comprises two slightly S-shaped blades and upper and lower round carrier plated for fixing the blades. The two slightly S-shaped blades are distributed on the round carrier plates correspondingly in parallel and form central symmetry with respect to the central axis of the wind wheel. The outer plate surface of each of the upper and lower round carrier plates is provided with four reinforcing ribs which form an included angle of 90 degrees with one another; the slightly S-shaped blades are riveted to the upper and lower round carrier plates; the edges of the upper and lower round carrier plates are folded to form folded edges. Compared with the conventional Savonius wind wheel, the drag type wind wheel has the advantages of lower start wind speed and high wind energy conversion efficiency; the thickness of aluminum alloy plates used for making the semi-circular arc blades and wind stop sheets can be reduced to 0.7mm, so that materials are saved and the making cost is reduced.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a drag-type wind wheel for a vertical-axis wind power generator. Background technique [0002] At present, the mainstream type of wind turbine in the market is the horizontal axis wind turbine, which has the advantages of relatively large blade tip speed, fast wind rotor speed, and high power generation efficiency; its disadvantages are that the internal structure is complicated, the transportation and installation costs are high, and There is a lot of noise pollution. On the contrary, vertical axis wind turbines have a simple structure and low cost, but due to the small tip speed ratio of the original vertical axis wind turbines and low wind energy utilization, vertical axis wind turbines have not been taken seriously. Until the appearance of Savonius type wind wheel and Darrieus type wind wheel in the 20th century. [0003] The Savonius type wind rotor is a resistance type...

AI Technical Summary

Problems solved by technology

[0003] The Savonius type wind rotor is a resistance type wind rotor, which has the advantages of large starting torque, self-starting at almost any wind speed, simple power conversion equipment, and can be installed on the surface of buildings; the disadvantage is that the asymmetry of the blades causes the airflow to the wind rotor Generate lateral thrust, causing excessive loss, affecting power generation efficiency and safety

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