Wind Turbine Blade Tip Extension Bonding with Adhesive Dams
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The installation of blade tip extensions on wind turbines is technically challenging due to the need for accurate and reliable attachment methods, especially in harsh climate conditions, and existing solutions do not adequately address the issue of adhesive control and void prevention in the bonding process.
Innovation Solution
A method involving a tip extension with adhesive dams and injection holes to control adhesive flow and prevent voids, where the adhesive dams are permeable to air and become sandwiched between the blade and the tip extension, allowing for precise bonding and easy visualization of adhesive progression through a translucent shell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is supplied through holes in the tip extension to bond the tip extension to the blade, then the bonding process is simplified and made more reliable, but adhesive may spread uncontrollably into outer regions of the tip extension creating voids and compromising bond quality
Solution Approach 1:
The patent applies adhesive dams at specific locations within the tip extension to create localized adhesive containment zones. The dams are positioned to prevent adhesive from spreading into regions where it would create voids, while allowing adhesive to flow freely in bond cavities where it is needed. This local differentiation of adhesive flow control resolves the contradiction between reliable bonding and precise adhesive placement.
Solution Approach 2:
Adhesive dams serve as intermediary elements between the adhesive injection system and the bonding interface. These dams mediate the adhesive flow by containing it within desired boundaries while allowing controlled passage through permeable sections. The dams translate the simple injection action into precise adhesive distribution, resolving the contradiction between simplified injection and precise placement.
2Manufacturing precision
If adhesive dams are provided to constrain adhesive flow, then adhesive placement precision is improved, but the device complexity increases due to additional components
Solution Approach 1:
The adhesive dams are made from permeable foam material that allows controlled passage of adhesive and air. This porosity enables the dams to constrain adhesive flow while remaining integrated with the bonding process, avoiding the need for separate rigid barrier components. The foam material provides adhesive containment with minimal added complexity.
Solution Approach 2:
The adhesive dams are formed from composite foam material that combines structural support functions with adhesive containment functions. This multi-functionality reduces the need for separate components, as the foam dams provide both mechanical support and adhesive flow control, resolving the contradiction between precision and complexity.
3Measurement precision
If the tip extension shell is made translucent to visualize adhesive progression, then measurement precision is improved, but the material selection becomes more restricted
Solution Approach 1:
The patent utilizes the optical property of translucency in the tip extension shell material to enable visualization of adhesive progression during injection. By selecting materials with appropriate optical properties, the system provides real-time feedback on bonding status without requiring separate sensing systems. This resolves the contradiction between measurement precision and material flexibility by incorporating the measurement function into the existing structural component.
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 method provides a straightforward, reliable, and durable attachment process that prevents voids and ensures a strong bond between the tip extension and the blade, enhancing wind energy capture while simplifying the installation process.
Implementation Method 1
The adhesive dam(s) are permeable to air
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A method of attaching a tip extension to a wind turbine blade is described. The method comprises: fitting the tip extension over a tip end of the blade such that an overlap region is defined between an outer surface of the blade and an inner surface of the tip extension; and supplying adhesive to the overlap region via one or more holes provided in the tip extension to bond the tip extension to the blade. In preferred embodiments, adhesive dams are provided in the overlap region to define bond cavities and constrain the adhesive within the bond cavities. An assembly comprising a wind turbine blade and a tip extension bonded thereto is also described.