Logarithmic Spiral Impeller for Low-Noise Distributed Wind Capture
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Solution Overview
Problem
Existing wind turbines suffer from low wind energy utilization, high noise levels, large installation area, and high cost, making them unsuitable for urban and residential areas.
Innovation Solution
A wind power collection device with an impeller design featuring four spliced flow guide surfaces formed by logarithmic spiral lines, which guide winds to form cyclones, enhancing energy collection efficiency and reducing noise and installation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a horizontal axis fan is used to collect wind energy, then wind energy can be converted into mechanical energy, but it causes counter-wind loss and has low wind energy utilization
Solution Approach 1:
The patent inverts the conventional horizontal axis wind turbine design by using a vertical axis impeller with spiral flow guide surfaces. This inversion allows the wind to drive the impeller from any direction without requiring counter-wind steering, eliminating counter-wind loss and improving wind energy utilization.
Solution Approach 2:
The patent employs spiral flow guide surfaces with logarithmic spiral curves on the impeller. These curved surfaces guide the wind to form cyclones that rotate the impeller, efficiently converting wind kinetic energy into mechanical energy while adapting to varying wind directions.
2Productivity
If a horizontal axis fan with large blade area is used, then wind energy collection is improved, but it causes loud pneumatic noise, high cost, and difficult installation
Solution Approach 1:
The patent divides the impeller into multiple flow guide surfaces (typically three) with spiral curves, each segment contributing to cyclone formation. This segmentation achieves effective wind energy collection with a compact structure, reducing blade area while maintaining performance and lowering noise.
Solution Approach 2:
The patent uses the pneumatic principle of cyclone formation, where the spiral flow guide surfaces guide wind to create rotating air vortices that drive the impeller. This pneumatic design is more efficient and quieter than conventional blade designs, reducing harmful noise while maintaining energy collection effectiveness.
3Productivity
If a horizontal axis fan with large blade area is used, then wind energy collection is improved, but it results in high cost and difficult installation
Solution Approach 1:
The patent employs a compact impeller structure divided into discrete flow guide surfaces that can be manufactured separately and assembled. This segmentation reduces material requirements, lowers manufacturing cost, and simplifies installation compared to large horizontal axis blades, making it suitable for distributed settings.
Solution Approach 2:
By inverting from horizontal to vertical axis design with a compact impeller, the patent creates a structure that is simpler to manufacture and install. The vertical axis configuration with spiral flow guides requires less space and simpler support structures, reducing overall system cost and installation complexity.
4Productivity
If conventional wind turbine design is used, then wind energy can be converted, but it requires large setting area and is not suitable for urban areas
Solution Approach 1:
The patent inverts the conventional horizontal axis design to a vertical axis impeller configuration. This inversion dramatically reduces the setting area requirement, as the compact impeller can be mounted on a small pole or column, making it suitable for urban and residential areas where space is limited.
Solution Approach 2:
The patent transitions from horizontal plane operation to vertical axis operation, utilizing the vertical dimension for wind energy capture. This dimensional change allows the device to collect wind energy from all directions around the vertical axis, maintaining effectiveness while minimizing ground footprint.
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
The device achieves efficient wind energy utilization, low noise operation, and easy installation, suitable for distributed settings, and operates in varying wind conditions.
Implementation Method 1
the flow guide surfaces are formed by rotating and stretching the flow guide curves around an axis line of the impeller in an axial direction; the flow guide curves each include a segment of convex first logarithmic spiral line and a segment of concave second logarithmic spiral line
Implementation Method 2
The principle of wind drive is to convert the kinetic energy of the wind into mechanical energy
Data Source
AI summary
A wind power collection device, a gas storage device, and a power generation system, where the wind power collection device includes an impeller, an outer side wall of the impeller is composed of four mutually spliced flow guide surfaces, radial cross sections of the four mutually spliced flow guide surfaces correspond to four mutually spliced flow guide curves, the flow guide surfaces are formed by rotating and stretching the flow guide curves around an axis line of the impeller in an axial direction; and the flow guide curves include a segment of convex first logarithmic spiral line and a segment of concave second logarithmic spiral line, and the first logarithmic spiral line and the second logarithmic spiral line of the flow guide curves are smoothly and transitionally connected at one side close to the axis line.