Blade of wind driven generator

Abstract

The invention discloses a blade of a wind driven generator. The blade consists of a blade root part (1), a blade middle part (2) and a blade outer part (3); the cross section of the inner end of the blade root part is cylindrical or flat; the cross section of the outer end of the blade root part is flat or aerofoil-shaped; a ratio of the length to the average width of the blade middle part is (5-200):1; the width of the blade middle part is gradually reduced from the inner end to the outer end; the blade middle part is torsional aerofoil-shaped or torsional flat; a staggered angle of the inner end and the outer end of the blade middle part is 5-45 degrees; a ratio of the length to the average width of the blade outer part is (1-20):1; the width of the blade outer part is gradually reducedor equal from the inner end to the outer end; the blade outer part is torsional aerofoil-shaped or torsional flat; and a staggered angle of the inner end and the outer end of the blade outer part is 10-90 degrees. In a wind turbine with the blade, a whole set of rotary driving device is not required to be arranged, and only one slewing bearing is required to meet the requirement, so that the system cost is reduced.

Description

technical field [0001] The invention belongs to the field of wind energy utilization and relates to a blade for wind power generation. Background technique [0002] Blades are the core components for converting wind energy into mechanical energy in the process of wind power generation. The blades of the horizontal axis wind turbines in the prior art are lift-type blades in the shape of airfoils. The blades are relatively straight and have a small twist angle. Using such blades The wind turbine cannot start when the wind speed is lower than the starting wind speed, and when the wind speed is higher than the rated wind speed, if no additional measures are taken, the speed is too fast, which may easily lead to damage to the blades and even the entire mechanical structure. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a blade of a wind power generator. [0004] Technical scheme of the prese...

AI Technical Summary

Problems solved by technology

[0002] Blades are the core components for converting wind energy into mechanical energy in the process of wind power generation. The blades of the horizontal axis wind turbines in the prior art are lift-type blades in the shape of airfoils. The blades are relatively straight and have a small twist angle. Using such blades The wind turbine cannot start when the wind speed is lower than the starting wind speed, and when the wind speed is higher than the rated wind speed, if no additional measures are taken, the speed is too fast, which will easily lead to damage to the blades and even the entire mechanical structure

Images