Blade and impeller of vertical shaft wind driven generator

Abstract

The invention relates to a vertical shaft wind driven generator, in particular to a blade and an impeller which are capable of improving the efficiency of the vertical shaft wind driven generator and running stably without noise. The blade of the vertical shaft wind driven generator consists of a main wing and auxiliary wings, wherein the cross section of the blade is wing-shaped, and the auxiliary wings are bent towards a wheel axle, are arranged in vertical symmetry and are connected with a main wing section to form the blade. According to the blade with a bent structure and the impeller consisting of the blade, when the blade rotates around the center line of the wheel axle, an auxiliary wing section can reduce the loss of swirling airflow of the blade, so that the efficiency of the wind driven generator is improved; the rotation moment of the blade can be increased, and low-wind-speed start and operation of the impeller are realized; and the bending stress of the blade can be reduced, the blade is lighter, the rotating speed of the blade is higher, and the operation stability of the impeller is enhanced. The blade has a streamline shape, so intense friction and cutting with the airflow are avoided, and the noise of the wind driven generator can be eliminated.

Description

technical field [0001] The invention relates to a vertical-axis wind-driven generator, in particular to a blade and an impeller of a vertical-axis wind-driven generator capable of starting in a breeze, stable in operation and noiseless. Background technique [0002] Wind turbines can be divided into horizontal axis wind turbines and vertical axis wind turbines. Studies have shown that compared with horizontal axis wind turbines, vertical axis wind turbines have the following advantages: simple structure, high utilization rate of wind energy, convenient installation and maintenance, and low noise. However, this model also has the defects of large starting torque, difficulty in starting at low wind speed, and poor running stability. The invention patent with the publication number CN1916397A proposes a winglet device for a vertical axis wind power generator to solve the above problems. The winglet device disclosed in this patent adopts a sheet-like structure, and the structur...

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Problems solved by technology

However, this model also has the defects of large starting torque, difficulty in starting at low wind speed, and poor running stability.

The invention patent with the publication number CN1916397A proposes a winglet device for a vertical axis wind power generator to solve the above problems. The winglet device disclosed in this patent adopts a sheet-like structure, and the structure of the device is simple, which can relieve the wind to a certain extent when the impeller rotates. The problem of reduced wind energy utilization due to vortex airflow loss

However, the cross-section of the winglet device is a non-airfoil structure, and the air flow will not generate lift on the blade when it flows through the winglet device; the non-streamlined structural shape of the winglet device also intensifies the friction between the impeller and the air flow when it rotates and cutting action, which increases the operating noise of the wind turbine

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