Vertical axis wind turbine with protecting device capable of adjusting wind wheel radius

Abstract

The invention aims at providing a vertical axis wind turbine with a protecting device capable of adjusting the wind wheel radius. The vertical axis wind turbine is mainly composed of a transmission lead screw, a lead screw nut, blades, a support, a servo motor, a main shaft and an electric generator. The middle end of a blade support is hinged to a supporting rod. The other end of the supporting rod is hinged to a sliding disc. The sliding disc and the nut are connected through a safety pin. The transmission lead screw rotates to enable the nut to drive the sliding disc to move up and down, and therefore the supporting rod is pushed to push the support to be unfolded and folded. The servo motor is installed in the middle of the main shaft, and the lead screw is driven by a coupler is rotate. When the wind speed suddenly changes and affects fan working safety, a centrifugal ball rotates at high speed to generate centrifugal force to pull the safety pin, the sliding disc is disengaged from the nut, the support is folded, and then the wind wheel radius is rapidly decreased, and fan accidents are avoided. The problem that the windward area of common fans cannot be adjusted is solved, the starting capacity of the vertical axis wind turbine is improved, the electric generation efficiency of the vertical axis wind turbine at different wind speeds is improved, and the safety of the wind turbine in the strong wind environment is improved.

Description

technical field [0001] The invention relates to a generator, specifically a wind power generator. Background technique [0002] The development of industry has led to the increasing shortage of fossil fuels such as petroleum and the increasingly serious environmental pollution in the new century. The development of clean and renewable energy has become the focus of research worldwide, and wind power has become a hot technology that has attracted much attention. Among them, the vertical axis fan technology has attracted attention because of its environmental protection and strong self-starting ability. Starting ability, working range and wind energy utilization are usually the key to judge the performance of vertical axis wind turbines. A large number of studies have shown that large solidity vertical axis wind turbines are suitable for low tip speed ratio working environments, and are mainly used for water pumping, irrigation, etc.; small solidity vertical axis wind turbine...

AI Technical Summary

Problems solved by technology

[0003] The patent "extendable vertical axis wind turbine" (patent number: 201210081433.5) adopts fixed-propeller blades, and realizes the deployment and retraction of blade spokes and support plates through four sets of screw rods installed on the base. Reduced fan rotational inertia reduces fan efficiency, and lacks unsafe wind speed protection devices

The patent "a vertical axis wind turbine with adjustable frontal area" (patent number: 201410055338) uses a scissors fork and a rope mechanism to adjust the radius of the wind wheel, but due to the flexibility of the rope, the problem of not being timely and accurate in adjusting the radius of the wind wheel

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