Wind Turbine Blade Surface Mounted Device Dual-Bonding Attachment
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Solution Overview
Problem
Wind turbine blades face challenges in attaching surface-mounted devices due to high peel forces and complex mounting processes, which can lead to device detachment and increased manufacturing costs, especially in the root and transition regions where aerodynamic performance is critical.
Innovation Solution
A dual-bonding attachment system using an elastic outer bond and a structural inner bond, with the outer attachment part being a flexible double-sided tape and the inner part a robust adhesive, to secure surface-mounted devices like flow guiding devices to the blade, reducing peel stresses and simplifying the attachment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a surface mounted device is attached to the blade surface using conventional single-bonding methods, then the attachment process is simple, but the device is prone to detachment due to high peel forces during blade operation
Solution Approach 1:
The attachment system is divided into two distinct bonding connections: an outer elastic bond and an inner structural bond. This segmentation allows each bonding layer to perform its specific function - the outer layer absorbs peel stresses while the inner layer provides strong anchoring, thereby improving attachment reliability without requiring a completely complex new system
Solution Approach 2:
The outer elastic bonding connection is designed to beforehand cushion and absorb the peel forces that occur during blade operation. This pre-cushioning mechanism protects the inner structural bond from the full impact of peel forces, preventing device detachment and improving reliability
2Reliability
If a rigid flow guiding device is mounted on the blade surface, then the device provides stable aerodynamic structure, but the device tends to separate from the blade surface when the blade bends under load
Solution Approach 1:
The bonding connections use materials with different elasticity parameters - the outer bond has higher elasticity to accommodate blade bending, while the inner bond has lower elasticity for strong anchoring. This parameter differentiation allows the attachment to maintain both flexibility for bending and strength for anchoring, resolving the contradiction between reliability and strength
3Ease of manufacture
If conventional attachment methods are used for surface mounted devices, then the manufacturing process is straightforward, but additional post-treatment steps such as painting are required to restore surface appearance
Solution Approach 1:
The attachment system merges the functional bonding purpose with the aesthetic surface restoration purpose into a single integrated solution. The outer elastic bond is designed to be visually acceptable, eliminating the need for separate post-treatment painting steps and simplifying the overall manufacturing process
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 dual-bonding system effectively reduces the risk of device detachment and simplifies the attachment process, enhancing the aerodynamic performance and longevity of wind turbine blades while minimizing manufacturing costs.
Implementation Method 1
an outer attachment part forming an elastic bond between the surface mounted device and the surface of the wind turbine blade
Implementation Method 2
an inner attachment part forming a structural bond between the surface mounted device and the surface of the wind turbine blade
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A wind turbine blade for a rotor of a wind turbine having a substantially horizontal rotor shaft, said rotor comprising a hub, from which the wind turbine blade extends substantially in a radial direction when mounted to the hub, the wind turbine blade having a longitudinal direction with a tip end and a root end and a transverse direction is provided. The wind turbine blade further comprises a profiled contour including a pressure side and a suction side, as well as a leading edge and a trailing edge with a chord having a chord length extending there between, the profiled contour, when being impacted by an incident airflow, generating a lift. A surface mounted device is attached to a surface of the wind turbine blade, wherein the surface mounted device is attached to the surface of the wind turbine blade via at least a first attachment part, which is connected to a part of the surface mounted device. The first attachment part comprises an outer attachment part providing a first bonding connection between the surface mounted device and the surface of the wind turbine blade, wherein the first bonding connection is an elastic bond, and an inner attachment part providing a second bonding connection between the surface mounted device and the surface of the wind turbine blade, wherein the second bonding connection has a structural bond.