A self-excited oscillating airfoil power generation device using vortex shedding effect

Abstract

The invention discloses a self-oscillation airfoil type generating set utilizing a vortex shedding effect. The self-oscillation airfoil type generating set is characterized in that a vertically-arranged sleeve, a vertically-arranged blade and a horizontally-arranged lug shaft capable of doing oscillating motion around the axis of the lug shaft are included; one end of the sleeve is fixed to the lug shaft, the bottom of the blade is inserted into the other end of the sleeve, and the blade can freely twist in the sleeve along the axis of the blade; and one end of the lug shaft is connected with a plane volute spring, and the other end of the lug shaft is connected with a power output device. According to the self-oscillation airfoil type generating set utilizing the vortex shedding effect, the blade in the set has two independent freedom degrees, and twisting and oscillating motion of the blade are both driven by fluid. The vortex shedding effect generated when the fluid passes through a bluff body is mainly utilized in the twisting motion of the blade, and the periodic lift force change of the blade is mainly utilized in oscillating of the blade.

Description

Technical field: [0001] The invention relates to a wind power or hydroelectric power generation device, in particular to a self-excited oscillation airfoil power generation device utilizing the vortex shedding effect. Background technique: [0002] With population growth, economic development and social progress, people's demand for energy, especially clean energy, is increasing. The power generation of traditional hydropower stations and wind turbines has been increasing year by year, but their impact on the environment has also attracted increasing attention. For example, the impact of hydropower stations on upstream and downstream ecology and local landforms, the noise pollution of large wind turbines and their impact on migratory bird migration. The installed capacity of traditional hydropower stations and wind turbines, especially hydropower stations, is gradually approaching their limit values. In this context, conventional water turbines and wind turbines as well as...

AI Technical Summary

Problems solved by technology

[0003] Existing oscillating airfoil energy-absorbing mechanisms are mainly translational in the direction perpendicular to the incoming flow, and support structures need to be installed at both ends of the blade, resulting in complex mechanisms and poor adaptability; in addition, special motor-driven wings are required Type torsion, or use mechanisms such as connecting rods and crankshafts to transmit the power of airfoil translation or flapping to the torsion drive mechanism, which not only reduces efficiency, but also increases costs

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