Mechanism for controlling propeller pitch angle of vertical-axis wind turbine with magnetic force and wind power

Abstract

The invention relates to a technology for directly controlling the propeller pitch angle of a blade by adopting magnetic force and wind power. The technology comprises the following steps of: connecting a rotor comprising magnetic elements with the outer side of a rotating shaft of the blade, coaxially rotating the rotor along with the blade, forming a stator by the magnetic elements connected with a wind wheel bracket; enabling the stator and the rotor to mutually act through the magnetic force, stopping the blade in a non-deflection position by the acting force in case of lacking the influence of wind power; and stopping the rotor rotating by the stator through magnetic force when the blade is driven by wind power and rotates downwind because the rotating shaft of the blade is arranged at the front side of the pressure center of the blade, increasing the acting force of the stator along with the increase of a deflection angle and rotating the blade to a position where the two forcesare balanced. The magnetic elements of the stator comprise energized coils and can change the relation between the deflection angle of the blade and the wind speed by controlling the change of the coil current, thus the invention is easy to realize the functions of wind mill start, pitch and speed variance, fixed-pitch speed variance, fixed-speed pitch variance, smooth-pitch halt, and the like.

Description

technical field [0001] The invention relates to a control mechanism for the blade pitch angle of a lift-type vertical-axis wind-driven generator. Through the control of the blade pitch angle, the performance of the lift-type vertical-axis wind-driven machine is greatly improved. The vertical-axis wind-driven machine blade propeller involved in the invention The pitch angle control method adopts magnetic force and wind force to directly control the pitch angle of the blade. Background technique [0002] The lift-type vertical axis wind turbine realizes the self-starting of the wind turbine through the control of the pitch angle of the blades, and can operate in a wide range of wind speeds. A simple and practical technology is to directly push the blades to deflect by wind to realize the change of the pitch angle. , limit the deflection amplitude with the centrifugal stopper, just disclose a kind of swing-wing type vertical axis wind turbine in Chinese invention patent applica...

AI Technical Summary

Problems solved by technology

Because the blade swing range is limited by the slider and the stop rod, the blade and related components are in a state of frequent collision during operation, which is easy to cause damage to the components, and the lubrication and sealing of the slider are also troublesome, so it is impossible to directly realize the variable pitch speed regulation

In my Chinese invention patent with application number 200910108678.0, I disclosed a method for directly controlling the deflection of vertical-axis wind turbine blades by using centrifugal force and wind force. When the wheel rotates under the action of wind force, the component is subjected to a centrifugal force towards the outside of the wind wheel, which has a moment on the blade shaft, and the blade is also affected by the wind force, and its moment on the blade shaft is opposite, and the blade will swing to two moments At the position where the algebraic sum is zero, the swing angle of the blade is directly related to the wind force and the speed of the wind rotor. It has good operating characteristics at wide wind speeds, and the structure is simple. The disadvantage is that the pitch regulation performance is limited and difficult to control when the wind speed is high.

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