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A variable-pitch high-power vertical-axis wind power generation device and a pneumatic start-stop control method

A wind power generation device and high-power technology, which is applied in the control of wind turbines, wind turbines at right angles to the wind direction, wind turbines, etc., can solve the problems of heavy weight of the whole machine, difficulty in braking, and difficulty in changing the pitch of blades, etc. Achieve the effect of reducing the difficulty of installation, reducing the cost of manufacturing, and ensuring feasibility

Active Publication Date: 2019-01-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems that the main shaft or support arm of the existing large-scale vertical axis wind turbine is too long, which leads to the overweight of the whole machine, and the difficulty in starting and braking due to the difficulty in changing the pitch of the blades, and provides a variable pitch high-power vertical wind turbine. Axial wind power generation device and pneumatic start-stop control method

Method used

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  • A variable-pitch high-power vertical-axis wind power generation device and a pneumatic start-stop control method
  • A variable-pitch high-power vertical-axis wind power generation device and a pneumatic start-stop control method
  • A variable-pitch high-power vertical-axis wind power generation device and a pneumatic start-stop control method

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specific Embodiment approach 1

[0015] Specific implementation mode one: combine Figure 1-Figure 5 Explain that a variable-pitch high-power vertical-axis wind power generation device in this embodiment includes a base 1, a hub 4, a shroud 6, a generator 2 and a plurality of blades 7, and the generator 2 is installed on the base 1 , the hub 4 is installed on the main shaft of the generator 2, the shroud 6 is covered on the hub 4, and it also includes an electric slip ring 8 and a plurality of pitch-changing devices consistent with the number of blades 7; each pitch-changing device includes a variable pitch Paddle motor 9 and gear pair 10;

[0016] A plurality of blades 7 are evenly distributed along the circumference of the generator 2, and the curved surface formed by the centerlines of the plurality of blades 7 is an inverted conical surface. The root of each blade 7 is rotatably mounted on the hub 4, and the hub 4 is arranged corresponding to each blade 7 There is a pitch device, and the two gears of eac...

specific Embodiment approach 2

[0018] Specific implementation mode two: combination figure 1 Note that the blades 7 and the shroud 6 of this embodiment are made of FRP. With such arrangement, the density is small, light weight, cheap and easy to obtain, and convenient to use. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0019] Specific implementation mode three: combination figure 1 and figure 2 Note that the blade 7 in this embodiment is a twisted blade with variable cross-section, the cross-section of the root of the blade 7 is circular, and the main body of the blade 7 is an airfoil structure with a gradually decreasing cross-section. The blades are standard symmetrical airfoils or asymmetrical airfoils, or biconvex airfoils on the cross section perpendicular to the axis of rotation. Symmetrical airfoils NACA0012, NACA0015, NACA0018, NACA0021, NACA0024, etc. and asymmetrical airfoils are preferred. NACA4412, DU06-W-200, and double-convex airfoil NACA23012 and E195, etc., such design can improve the aerodynamic performance of the wind turbine. The cross-section of the root is circular, which helps to enhance the strength of the root. The position of the main body near the root is an airfoil with a longer chord length. Small self-weight prevents it from breaking. Others are the same as i...

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Abstract

The invention provides a variable-pitch high-power vertical axis wind power generating device and a pneumatic starting-stopping control method, relates to a power generating device and a pneumatic starting-stopping control method, and aims at solving the problems of an existing large-size vertical axis wind turbine that an overlong main shaft or an overlong supporting arm causes overweight of the whole machine, and blades are difficult to vary the pitch, resulting in difficult starting and braking. The device comprises an electric slip ring, and a plurality of variable-propeller devices which are as much as the blades, wherein each variable-propeller device comprises a variable-propeller motor and a gear pair; a curved surface formed by center lines of the plurality of blades forms an inverted tapered surface; a root part of each blade is rotatably mounted on a hub; a variable-propeller device, corresponding to each blade, is arranged on the hub; two gears of each gear pair are correspondingly mounted on the root part of each blade and an output shaft of each variable-propeller motor; the variable-propeller motors are mounted on the hub; the electric slip ring is mounted on a main shaft of a power generator; the variable-propeller motors are electrically connected to the electric slip ring through conductors. The device can realize wind power generating in both a mountain land area and sea.

Description

technical field [0001] The invention relates to a power generation device and a pneumatic start-stop control method, in particular to an inverted cone type variable pitch high-power vertical axis wind power generation device, which belongs to the technical field of wind power generation equipment. Background technique [0002] At present, thermal power generation and hydropower generation are the main forms of power generation. However, coal is a non-renewable energy source, and hydropower resources are limited. Moreover, thermal power generation will cause non-negligible pollution to the environment. In order to protect resources and the environment and reduce carbon emissions, The main body of the power generation pattern should be changed to clean energy. Wind energy and solar energy are clean energy that can basically achieve zero emissions, and their reserves are huge, so they should be vigorously developed and actively promoted. [0003] In today's world, there are ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D3/00F03D9/25F03D7/06F03D3/06
CPCY02E10/74
Inventor 曲建俊赵越尹伟刘瑞娇
Owner HARBIN INST OF TECH
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