Multi-Stage Vertical Axis Wind Turbine for Counter-Torque Reduction
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Solution Overview
Problem
Vertical axis wind turbine generators suffer from lower power generation efficiency due to counter-torque wind pressure applied to rotor blades, and they are structurally unstable under strong winds when installed in multiple stages.
Innovation Solution
The design incorporates a stationary shaft with rotatably coupled rotor blades, wind guide plates, and a ball net or hemispherical plates that adjust the wind hole opening and closing mechanism to minimize counter-torque and enhance structural stability, using wind guide plates to concentrate wind pressure effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a vertical axis wind turbine generator is used, then it is not affected by wind direction and can be installed in multiple stages, but it suffers from lower power generation efficiency due to counter-torque wind pressure
Solution Approach 1:
The rotor blade is divided into multiple sections with wind holes at different positions. Each wind hole can be independently opened or closed by separate opening/closing members, allowing selective control of wind flow paths to optimize power generation while maintaining vertical axis configuration
Solution Approach 2:
The wind holes are equipped with opening/closing members that can dynamically adjust their state based on rotational position and wind conditions. This dynamic adjustment allows the blade to reduce counter-torque pressure during rotation while maintaining structural integrity
2Power
If the rotor blade rotates around a stationary shaft, then power generation is enabled, but counter-torque wind pressure is inevitably applied to the rotor blade
Solution Approach 1:
The wind holes are strategically positioned and controlled to convert the harmful counter-torque wind pressure into beneficial rotational force. By opening wind holes at specific rotational positions, the pressure differential created by wind flow through the holes generates additional torque that aids rotation rather than resisting it
3Productivity
If multiple wind power generating devices are installed in one tower-type structure, then space utilization is improved, but structural stability under strong winds deteriorates
Solution Approach 1:
The tower structure is divided into multiple independent stages, each containing its own power generating device. This segmentation allows each stage to independently handle wind loads, distributing the structural stress and improving overall stability while maintaining high power generation capacity
Solution Approach 2:
The multi-stage tower structure incorporates counterbalancing elements and distributed mass arrangement to counteract the destabilizing effects of strong winds on multiple rotating devices, maintaining structural stability during operation
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 significantly reduces counter-torque, increases rotation speed and efficiency of the rotor blades, and enhances structural stability, allowing for higher power generation even in strong winds.
Implementation Method 1
wind guide plates, which are provided in a multi-stage type on the stationary shaft... concentrate wind pressure effectively
Implementation Method 2
ball net or hemispherical plates that adjust the wind hole opening and closing mechanism to minimize counter-torque
Data Source
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AI summary
The present invention relates to a vertical axis multi-stage wind turbine generator in which multiple stages are provided in a vertical axis to construct a plurality of power generating devices in one power generation facility so that backwind power is enhanced to the maximum, and headwind power is minimized to achieve an economical and efficient power generation function.