Blades and impeller of vertical-shaft wind power generator

Abstract

The invention relates to a vertical-shaft wind power generator, in particular to blades and an impeller of an H type vertical-shaft wind power generator. The blades and the impeller are provided with auxiliary wings, can be started by gentle breeze, and are stable in operation and free of noise. Each blade of the vertical-shaft wind power generator is formed by a main wing and the auxiliary wings, wherein the cross section of the blade is in a wing shape, the auxiliary wings bend towards a wheel shaft side and are arranged in a vertically symmetrical, and the auxiliary wings and the main wing section are connected to form the blade. The impeller is formed by the blades with bent structures. When the blades rotate around the central line of the wheel shaft, the auxiliary wing sections can reduce spiral airflow loss of the blades to improve stability and efficiency of the wind power generator, increase rotation moment of the blades to achieve low-wind-speed starting operation of the impeller, and reduce bending stress of the blades to enable the blades to be light and fast in rotation speed and strengthen stability of operation of the impeller. Due to the streamline shapes of the blades, violent friction and cutting between the blades and air flows are avoided, and noise of the wind power generator can be eliminated. The blades with the structures and the impeller are concise in structure, attractive in appearance, simple in manufacture process and suitable for manufacture and popularization.

Description

technical field [0001] The invention relates to a vertical-axis wind-driven generator, in particular to an H-type vertical-axis wind-driven generator blade and impeller with auxiliary wings, simple structure, light wind start-up, stable operation and no noise. Background technique [0002] Wind turbines are divided into two types: horizontal axis and vertical axis. The H-shaped impeller is a common form of vertical axis wind turbines. It has the characteristics of simple structure, convenient installation and maintenance, acceptable wind from any direction, and low noise. Due to structural reasons, the straight blade impeller has the defects of difficulty in starting at low wind speed and poor stability at high speed. When the impeller is working, due to the difference in wind speed between the upwind side and the downwind side of the blade, the pressure of the airflow acting on the two sides is different, and there is a pressure difference. Facing the other side of the low...

AI Technical Summary

Problems solved by technology

On the one hand, the vortex air flow increases the resistance of the blades and affects the stability of the impeller; on the other hand, it also produces pressure loss near the ends of the blades, which reduces the lift force on the blades and reduces the efficiency of wind energy utilization.

At the same time, the centrifugal force on the blades of the H-type impeller increases with the speed of the impeller, which increases the bending stress of the blades and deteriorates the stability of the impeller.

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