Sail type vertical axis wind power generator

Abstract

The invention discloses a wind power generator and particularly discloses a sail type vertical axis wind power generator. The sail type vertical axis wind power generator is characterized in that a sail and a sail hoisting device are mounted on the periphery of a wind wheel; a mast centre O1 of the sail is revolved around a wind wheel center O; at the same time, the sail rotates around the mast centre O1 of the sail along the opposite direction; and a sheering device is mounted on the wind wheel. The sail type vertical axis wind power generator does no negative work at the direction against the wind so as to increase the rotor power coefficients. The theory numerical value thereof breaks through the Betz limit. The wind power generator is low in starting speed and high in cut-out speed, has long working time and high resource use ratio, and is mainly constructed on the ground in order to conveniently construct and maintain. The wind wheel of the wind power generator has no yawing force and utilizes the shifting by hoisting the sail.

Description

(1) Technical field [0001] The invention relates to a wind power generator, in particular to a sail type vertical axis wind power generator. (2) Background technology [0002] At present, there are mainly two types of vertical axis wind turbines in the prior art: one is the S-type wind turbine that uses wind resistance to work. If it is too large, it will seriously affect the safety of the whole machine. Another kind is to utilize wing lift to work, and its operating moment symmetry lateral pressure is little. The common advantages of the vertical axis wind power generators in the prior art are: the equipment is easy to build on the ground, simple to maintain, and does not need yaw control regardless of the wind direction. But its fatal flaw is first of all, when one side of the vertical axis is downwind and the other side is upwind, as long as the blade and the wind wheel shaft are fixed, the projected area of ​​the blade on the downwind side and the reverse side of the w...

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Problems solved by technology

But its fatal flaw is first of all, when one side of the vertical axis is downwind and the other side is upwind, as long as the blade and the wind wheel shaft are fixed, the projected area of ​​the blade on the downwind side and the reverse side of the wind direction are equal, but the blade There are some differences between the two sides of the profile line to generate torque, but the negative work on the upwind side is unavoidable, so the wind energy utilization coefficient of the wind turbines in the prior art is very low

On the other hand, the blades are fixed, so the kinetic energy similar to the variable pitch of the blades of the horizontal axis wind turbine cannot be realized, and the windward area of ​​the blades cannot be changed. When the storm comes, the machine will be destroyed.

Therefore, there are very few vertical axis wind turbines in the modern wind power industry, especially for large-scale units.

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