Variable-Angle Turbine Blades for High Efficiency Fluid Energy Conversion
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Solution Overview
Problem
Existing wind energy conversion systems, such as three-blade fans, suffer from low energy utilization efficiency, with maximum efficiency typically below 0.42 and difficulty in reaching 0.5, due to design limitations and energy loss in secondary conversion processes.
Innovation Solution
A novel turbine mechanism featuring a hub with a circular ring cross-section, equipped with crescent-shaped blades and a stepless variable-angle system, which allows fluid to impact the blades at optimal angles, enhancing energy interception and conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If three-blade fans are used with blades rotated by wind pushing, then the structure is simple, but the wind energy utilization efficiency is low (below 0.42)
Solution Approach 1:
The patent applies dynamics by making the blade installation angle variable rather than fixed. The blade angle can be adjusted dynamically to optimize the angle of attack relative to the wind direction, allowing the turbine to adapt to changing wind conditions and maximize energy capture throughout operation
Solution Approach 2:
The patent changes the parameter of blade installation angle from a fixed value to a variable parameter that can be continuously adjusted. This parameter change enables optimization of the angle of attack to improve wind energy utilization efficiency beyond the limitations of fixed-angle three-blade designs
2Length of moving object
If long blades with great swept areas are used, then the force arm is increased, but wind energy escapes through spaces between blades
Solution Approach 1:
The patent uses dynamic adjustment of blade angles to optimize the interaction between long blades and wind flow. By varying the installation angle, the turbine can maintain effective energy capture while reducing gaps that would allow wind energy to escape between the extended blades
3Loss of energy
If steam turbine dense blade design is applied to wind turbines, then fluid energy interception efficiency is improved, but the design complexity increases
Solution Approach 1:
The patent applies dynamics by implementing variable blade angles that can be adjusted to optimize the dense blade configuration for wind energy capture. This dynamic capability allows the system to achieve high interception efficiency similar to steam turbines while adapting to the specific conditions of wind power generation
Solution Approach 2:
The patent changes key design parameters including blade angle, blade density arrangement, and installation configuration to adapt the dense blade concept from steam turbines to wind turbine applications, achieving high fluid energy interception efficiency
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 proposed turbine mechanism significantly improves fluid energy utilization efficiency, potentially reaching 0.7 to 0.8, by maximizing energy interception through the crescent-shaped blades and stepless angle adjustment, thereby enhancing the overall efficiency of wind and water energy conversion.
Implementation Method 1
High-energy fluid totally impacts the turbine plane without obstruction, so that the fluid energy interception efficiency is very high
Data Source
AI summary
A basic mechanism for converting fluid energy into mechanical energy is provided. A blade index plate, fluted disc hold-down devices, a rolling pressing wheel, bevel gears, a fluted disc, a gear, bearings and a stepping self-locking motor are disposed in a hub. First shaft passing holes annularly and uniformly distributed around the hub are formed in a penetrating manner in an annular steel belt. One end of a blade shaft extending out from a root end of each blade is fixedly connected with a blade seat, and the other end of the blade shaft extending out of a head end of each blade is assembled with the annular steel belt. The annular steel belt is correspondingly connected with and penetrated through the blade shaft. The head end of the blade is fixedly provided with a blade baffle plate.