Wind Turbine Blade Lifting Device Passive Release Mechanism
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Solution Overview
Problem
Existing methods for lifting wind turbine blades are often complex, costly, and require active actuators for releasing the blades, making them difficult to operate and maintain.
Innovation Solution
A lifting device with a hollow closed space and movable retaining units that passively release the blade by changing direction, eliminating the need for active actuators and allowing for easy and reliable retention and release of the blade.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If active actuators are used for releasing the blade, then the release function can be actively controlled, but the device complexity and maintenance costs increase
Solution Approach 1:
The retaining unit is designed to automatically release the blade through passive movement along the blade's longitudinal axis. The unit moves from a first position (retaining the blade) to a second position (releasing the blade) without requiring active actuators, operators, or external energy sources. The blade's own weight and positioning enable the release mechanism, making the system self-service and eliminating complex actuator systems.
2Reliability
If the lifting device is moved along the blade in the first blade direction, then the blade is retained securely, but the release process becomes difficult without active actuators
Solution Approach 1:
Instead of using active actuators to push or pull the retaining unit for release, the system inverts the approach by allowing the retaining unit to move passively along the blade's longitudinal axis. The unit is designed to slide from the first position to the second position automatically when the blade is properly positioned, making release easy without complex mechanisms.
3Device complexity
If simple passive retaining units are used, then the device complexity is reduced, but the control over retention and release may be insufficient
Solution Approach 1:
The retaining unit is designed with dynamic movement capability along the longitudinal axis of the blade. It can actively move between a first position (for secure retention) and a second position (for release) depending on the operational phase. This dynamic positioning ensures reliable retention control during lifting while enabling easy release, maintaining both simplicity and reliability.
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 provides a simple, low-cost, and reliable method for lifting and releasing wind turbine blades, reducing operational complexity and maintenance costs while ensuring safe handling.
Implementation Method 1
the retaining units are configured movable with respect to the support structure in the first blade direction and the retaining units are configured to release the retained portion of the wind turbine blade from the retaining units by passively moving with the wind turbine blade in the first blade direction when the lifting device is moved in a second blade direction being opposite to the first blade direction and the load from the weight of the wind turbine blade applied on the retaining units is removed
Data Source
Figure 1
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AI summary
The invention relates to a lifting device (1) for lifting a wind turbine blade (100) of a wind turbine. Further, the inventions relates to a method for lifting a wind turbine blade (100) by means of such a lifting device (1).