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V-type vertical shaft wind turbine with automatic speed limiting function

A technology for automatic speed limiting and wind turbines, applied in the field of wind turbines, can solve the problems of lack of speed limiting protection devices, damage to wind rotor blades or generators, etc., and achieve the effects of good speed limiting effect, low cost and high reliability.

Pending Publication Date: 2020-08-14
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of a reliable speed limiting protection device, small wind turbines can easily cause damage to the rotor blades or generators when encountering strong winds

Method used

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  • V-type vertical shaft wind turbine with automatic speed limiting function
  • V-type vertical shaft wind turbine with automatic speed limiting function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] On the basis of the above structure, in this embodiment, the space enclosed by multiple sets of blade assemblies 1 is horizontally rotatably installed with a turntable 2 for restricting the turning of the multiple sets of blade assemblies 1, and the turntable 2 coaxially rotates and is sleeved on the rotating shaft. At the top of 10, the turntable 2 cooperates with multiple sets of blade assemblies 1, through which the turntable 2 cooperates with multiple sets of blade assemblies 1 to facilitate the adjustment of the inclination of the blade assembly 1, thereby limiting the speed of the generator 9.

[0031] The rotating disk 2 is sleeved on the upper end of the rotating shaft 10 of the generator 9

Embodiment 2

[0033] On the basis of Embodiment 1, in this embodiment, each group of blade assemblies 1 includes blades 3 , which are installed on one side of the turntable 2 in an oblique and reversible manner, and whose upper ends are connected to the turntable 2 through a stretching member. The blade 3 cooperates with the turntable 2 through the spring 4 and the cable 5, and the lower end is connected to the top of the generator 9 in rotation. The inclination of the blade 3 is adjusted under the action of wind force, and the structure is simple and the adjustment is convenient.

Embodiment 3

[0035] On the basis of Embodiment 2, in this embodiment, the stretching member is a spring 4, one end of the spring 4 is fixedly connected to the turntable 2 in a manner conceivable by those skilled in the art, and the other end is connected to the blade 3 by the cable 5. The upper end is connected, and the two ends of the cable 5 are respectively fixedly connected with the other end of the spring 4 and the upper end of the blade 3 in a way that those skilled in the art can think of. The structure is simple and the adjustment is convenient.

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Abstract

The invention relates to a V-type vertical shaft wind turbine with an automatic speed limiting function. The V-type vertical shaft wind turbine comprises a generator and a plurality of blade assemblies evenly distributed in the circumferential direction of a rotating shaft of the generator at intervals, the multiple blade assemblies are all inclined, the lower ends of the blade assemblies are correspondingly and rotatably connected with the top of the generator, and the blade assemblies can be turned up and down in a positioned mode; and under the action of wind, the blade assemblies are turned up and down to make the upper ends of the blade assemblies close to or away from each other, so as to adjust the inclination of the blade assemblies. The V-type vertical shaft wind turbine has the beneficial effects that the structure is simple, the speed limiting effect is good, the cost is low, and the reliability is high; and in addition, compared with an existing straight blade vertical shaft wind turbine, a blade bracket is not needed, the cost is saved, and the influence of bracket wake flow on the efficiency of the wind turbine is also avoided.

Description

technical field [0001] The invention relates to the technical field of wind turbines, in particular to a V-shaped vertical axis wind turbine with an automatic speed limiting function. Background technique [0002] At present, large wind turbines mostly use active pitch change for speed limit protection. However, this speed limit protection method is too expensive and not suitable for small wind turbines. Small wind turbines are divided into horizontal axis and vertical axis wind turbines. The speed limiting methods of small wind turbines include sideways or pitched wind rotors, passive stall and passive pitch control, which can be used for passive pitch control of vertical axis wind turbines. [0003] The structures required by these existing speed limiting protection methods are relatively complicated, and the required devices need to be manufactured specially, and the cost is relatively high. The price of small wind turbines is low, and most users lack professional maint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D3/06F03D7/06F03D9/25
CPCF03D3/005F03D3/062F03D7/06F03D9/25Y02E10/74
Inventor 冯国英
Owner WUHAN INSTITUTE OF TECHNOLOGY