Vertical Axis Wind Turbine Rotor Blades for Counter-Torque Control
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Solution Overview
Problem
Horizontal axis wind turbine generators suffer from large rotational radii causing noise and are unsuitable for neighborhood installations, while vertical axis generators face counter-torque wind pressure reduction and structural instability, especially in multi-stage configurations.
Innovation Solution
The rotor blade is divided into a fixed blade and movable blades, with a wind hole at the center, allowing movable blades to close or open the hole based on wind direction to maximize backwind pressure and minimize headwind pressure, and a conical frame is used to support multiple stages with grounding poles for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a rotor blade is used in a vertical axis wind turbine generator, then power generation is enabled, but counter-torque wind pressure is generated that reduces torque
Solution Approach 1:
The rotor blade is divided into a fixed blade portion and movable blade portions. The movable blade portions can change their position relative to the fixed blade portion to control wind flow through the wind hole, thereby managing counter-torque wind pressure while maintaining power generation capability
Solution Approach 2:
The movable blade portions are designed to dynamically adjust their position based on wind conditions. When wind blows from the rear, the movable blades close the wind hole to maximize backwind pressure; when wind blows from the front, they open the wind hole to minimize headwind pressure, thereby reducing counter-torque effects
2Productivity
If a horizontal axis wind turbine generator is used, then power generation efficiency is improved, but large rotational radius causes loud noise and makes it unsuitable for neighborhood installations
Solution Approach 1:
The patent inverts the conventional horizontal axis configuration by using a vertical axis wind turbine generator. This inversion allows the turbine to be installed in neighborhood living spaces with smaller rotational radii, reducing noise while still achieving power generation through the specialized rotor blade design with wind hole control
3Power
If a multi-stage vertical axis wind turbine generator is installed to produce large amounts of electricity, then power output is increased, but structural stability is reduced
Solution Approach 1:
The multi-stage turbine is divided into separate stage modules, each with its own conical frame and grounding poles. This segmentation allows each stage to be independently stabilized while working together to produce large amounts of electricity, maintaining structural stability through distributed support structures
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances wind pressure efficiency, reduces noise, and ensures structural stability for vertical axis wind turbines, enabling high-efficiency power generation and installation in small spaces or multi-stage configurations.
Implementation Method 1
when backwind blows, the movable blades close the wind hole 120e of the fixed blade 120a, and when headwind blows, the movable blades open the wind hole 120e of the fixed blade 120a to minimize a wind pressure of the headwind
Data Source
AI summary
The present invention relates to a vertical axis wind turbine generator in which a rotor blade (120) divided into a fixed blade (120a) and movable blades (120b, 120c and 120d) is connected to a rotor blade rotating shaft (110) provided to be vertical, so that backwind power of the rotor blade (120) is enhanced to the maximum, and headwind power is minimized to enable high-efficiency power generation.