Bi-directional Contra-rotating Windmill with Y-shaped Blades
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Solution Overview
Problem
Conventional windmills face limitations in power generation capacity, efficiency, and wind energy utilization due to bearing load fatigue, restricted blade diameter, low solidity ratio, and inefficient use of high wind speeds, leading to reduced energy output and increased costs.
Innovation Solution
The bi-directional contra-rotating circular-rail bearing Y-shaped compound blade windmill design features a remote automatic control system, Y-shaped compound blades with a high solidity ratio, and hydraulic or pneumatic energy collection systems, allowing for a larger swept area, efficient energy conversion, and operation in strong winds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the windmill diameter is increased to scale up power generation capacity, then the electric energy output is improved, but the weight of the windmill and generator is greatly increased and the service life is reduced due to bearing load fatigue
Solution Approach 1:
The windmill is divided into multiple independent power generation units (first power generation unit, second power generation unit, etc.), each with its own generator and blade system. This segmentation allows the total power generation capacity to be distributed across multiple smaller units, reducing the bearing load and weight concentration on any single unit while maintaining overall high productivity.
2Productivity
If the solidity ratio of the windmill blades is improved to increase wind catch area, then the electric energy output is improved, but the conventional solidity ratio is limited between 5% and 20% resulting in waste of wind resource
Solution Approach 1:
The blades are designed with adjustable pitch angles that can be dynamically changed based on wind conditions. The pitch angle adjustment mechanism allows the blade solidity ratio to be optimized in real-time, enabling the windmill to capture maximum wind energy across varying wind speeds while avoiding energy waste from fixed suboptimal configurations.
3Productivity
If the rated wind speed is improved to increase full-load power generation time, then the electric energy output is improved, but the cut-off wind speed of conventional windmills is generally 25 m/s and considerable wind energy at high wind speed has to be abandoned
Solution Approach 1:
The windmill system incorporates variable cut-off wind speed parameters across different power generation units. By adjusting the operational parameters of each unit independently, the system can extend the effective wind speed range beyond the conventional 25 m/s limit, capturing high wind speed energy that would otherwise be abandoned while maintaining safe operational limits.
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 enables a significant increase in wind energy capture, reduces construction costs, and maintains a high tip speed ratio, ensuring stable operation and efficient power generation across a wide range of wind speeds.
Implementation Method 1
Y-shaped compound blades (2) formed by individual blades... bi-directional contra-rotation and compound blades makes the solidity ratio of the windmill blades reach 100%... blades can operate in strong wind
Implementation Method 2
hydraulic energy collection multi-unit power generating systems (6)... hydraulic or pneumatic energy collection multi-unit power generating systems allow the windmill to have large installed capacity
Implementation Method 3
pneumatic energy collection multi-unit power generating systems (7)... hydraulic or pneumatic energy collection multi-unit power generating systems allow the windmill to have large installed capacity
Implementation Method 4
multi-unit power generating systems generate much electric energy... water wheel generator set (616)... gas wheel generator set (709)
Data Source
Figure 1~2
Figure 3-1
Figure 3-2
AI summary
A bi-directional contra-rotating circular rail bearing Y-shaped compound blade fluid energy collection multi-unit power generating windmill, the windmill comprising: a windmill remote automatic control system (1); a Y-shaped compound blade (2) from a combining of single blades; a circular rail windmill body (3) bearing the Y-shaped compound blade (2); a circular windmill rail (4) bearing the circular rail windmill body (3) for operation; a circular rail connection cable pulling vehicle (5) running on the circular cable pulling vehicle rail to pull the circular rail windmill using a stay cable (209); a hydraulic energy collection multi-unit power generating system (6) or pneumatic energy collection multi-unit power generating system (7); the Y-shaped compound blade (2) is born by three circles of the circular rail windmill body (3) arranged equidistant thereon; the circular rail windmill body (3) has six circles, and the opening angle of the Y-shaped compound blade (2) born by the inner three circles of the circular rail windmill body (3) is opposite the opening angle of the Y-shaped compound blade (2) born by the outer three circles of the circular rail windmill body (3), realizing bi-directional contra-rotation of the circular rail windmill; and the circular cable pulling vehicle rail has four circles, and the circular rail connection cable pulling vehicle (5) runs thereon, every two circles the circular rail connection cable pulling vehicle (5) being connected to the Y-shaped compound blade (2) in the middle via the stay cable (209). The structure realizes efficient and large-scale use of wind energy.