Rotor Blade Trailing Edge Assembly with Varying Cross-Section
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Solution Overview
Problem
Existing rotor blades in wind turbines face challenges in manufacturing due to poor structural characteristics of fiberglass, leading to difficulties in achieving a precise trailing edge finish, noise generation, and susceptibility to damage during transportation and operation.
Innovation Solution
A trailing edge assembly with a varying cross-section, manufactured from electrically conductive materials like copper or aluminum, is integrated into the rotor blade, featuring a sharp or pointed trailing edge to reduce noise and enhance structural integrity, allowing for reduced manufacturing time and costs, and providing continuous lightning protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fiberglass shells are used to manufacture rotor blades, then the blades can be formed with leading and trailing edges, but the trailing edge cannot be finished to less than two-and-a-half millimeters due to poor structural characteristics of fiberglass
Solution Approach 1:
The trailing edge assembly is divided into separate components including a first component attached to the suction side and a second component attached to the pressure side, allowing each to be manufactured and assembled independently to achieve precise alignment and finish
Solution Approach 2:
The invention uses a composite construction combining fiberglass blade shells with metal trailing edge components, leveraging the advantages of both materials to achieve both precision and structural strength
2Object-generated harmful factors
If the trailing edge width is reduced to reduce noise, then noise generation decreases, but the trailing edge becomes weaker and more susceptible to damage
Solution Approach 1:
The metal trailing edge components provide the structural strength and durability needed for narrow trailing edges, enabling the blade to maintain both low noise operation and high reliability
Solution Approach 2:
The trailing edge assembly includes features such as reinforcing ribs and specific geometric configurations that concentrate strength where needed while maintaining a narrow overall profile to reduce noise
3Power
If rotor blades are made longer to increase power generation, then energy production increases, but the blades become more susceptible to buckling and damage during transportation and installation
Solution Approach 1:
The trailing edge assembly is pre-assembled as a complete unit with all components attached before installation on the blade, eliminating the need for on-site assembly and reducing the risk of damage during transportation and installation
Solution Approach 2:
The blade is divided into modular sections that can be transported separately and assembled on-site, reducing transportation risks while enabling longer blade lengths for increased power generation
4Ease of manufacture
If traditional fiberglass trailing edges are used, then manufacturing is simpler, but additional finishing is required and manufacturing time increases
Solution Approach 1:
The trailing edge components are manufactured and pre-assembled off-site in a controlled environment, allowing for precise finishing and quality control before installation, thereby reducing on-site manufacturing time and complexity
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 solution reduces noise generation, enhances structural integrity, and decreases the risk of damage during transportation and installation, while also serving as a cost-effective means to improve turbine performance and extend component life.
Implementation Method 1
forcing fluid to follow a sharp trailing edge, thus minimizing pressure fluctuations
Data Source
AI summary
A method of assembling a rotor blade for a turbine is provided that includes forming a rotor blade trailing edge by coupling a suction side terminus to a pressure side terminus and positioning a trailing edge assembly between the suction side terminus and the pressure side terminus, the trailing edge assembly having a varying cross-section.