Wind Turbine Rotor Blade Angle Alignment Device
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Solution Overview
Problem
Current methods for setting the output angle position of wind turbine rotor blades are cumbersome, prone to inaccuracies, and require multiple technicians, leading to performance losses and vibrations due to the unwieldiness of existing leaf gears and laser direction tools, which are also time-consuming and require complex setup.
Innovation Solution
A device with two specific alignment aids and a laser module that projects a laser beam directly onto the connecting level between these aids, allowing for precise alignment without the need for extensive setup or disassembly of other components, enabling faster and more accurate setting of the output angle position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional leaf gears are used for manual setting of the output angle position, then the marking on the rotor leaf can be aligned with the leaf gear, but the leaf gears are unwieldy, require two fitters, are prone to damage (bending), and make exact setting impossible
Solution Approach 1:
The patent replaces the mechanical leaf gear system with an optical laser-based alignment system. The laser direction tool projects a laser beam that creates a precise alignment reference without requiring physical contact or manual manipulation of unwieldy mechanical components. This substitution eliminates the bending and damage issues associated with traditional leaf gears while maintaining alignment precision.
Solution Approach 2:
The patent uses a laser beam to create an optical copy or projection of the alignment reference onto the rotor blade area. Instead of physically moving and positioning a large leaf gear, the system projects a virtual alignment marker that can be precisely positioned and observed, enabling accurate alignment without the physical constraints of traditional mechanical tools.
2Ease of operation
If laser direction tools are used for setting the output angle position, then alignment can be achieved, but the distance of 2 to 4 meters between the laser and hub marking, combined with imperfections like ovalities and angle errors in the leaf angle bearing, leads to significant errors in the leaf setting
Solution Approach 1:
The patent repositions the laser direction tool much closer to the rotor blade and hub marking area, effectively changing the spatial dimension of the alignment process. By reducing the distance from 2-4 meters to a minimal distance, the system eliminates the amplification of errors that occurs over long distances, while the laser beam still provides clear optical alignment references on the rotor blade surface.
Solution Approach 2:
The patent applies the laser alignment function locally at the rotor blade area rather than from a distant position. This local application ensures that the laser beam interacts with the rotor blade and hub marking in close proximity, minimizing the impact of bearing imperfections and ovalities that would be magnified over longer distances. The alignment is performed right where it is needed, with minimal interference from distant mechanical imperfections.
3Ease of operation
If components such as fatty containers or fat container housings are removed to create space for the laser beam or leaf theory, then the laser or leaf theory can be positioned, but the re-mounting of these components after setting increases the time required for the leaf angle setting
Solution Approach 1:
The patent extracts or removes the laser direction tool from the need to be positioned behind or near obstructing components. By using a compact design and positioning the laser at an optimal location on the rotor blade, the system eliminates the need to remove fatty containers or other components to create space for the alignment tool, thus avoiding the time-consuming removal and re-mounting process.
4Ease of operation
If the marking on the rotor leaf is aligned with the leaf gear using proportion, then the output angle position can be set, but the result varies depending on the mechanic and even the results of several sheets of one and the same mechanic can vary significantly
Solution Approach 1:
The patent replaces the manual proportion-based alignment method with an optical laser alignment system. The laser provides a precise, objective reference that eliminates the subjectivity and variability inherent in manual proportion estimation. This substitution ensures that the alignment result is consistent and repeatable regardless of which mechanic performs the setting, as the laser provides an objective standard rather than relying on individual judgment.
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 device allows for precise and efficient adjustment of the rotor blade angle, reducing the need for multiple technicians and minimizing performance losses and vibrations, while also reducing setup time and potential damage from complex equipment.
Implementation Method 1
at least one laser module that is defined by the connection level between the two design aids for the outstanding Laser beams in such a way that the laser beam cuts the connecting level
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a device (1) for adjusting the blade angle of rotor blades of a wind turbine and to a corresponding method using this device (1). The device (1) comprises two spaced-apart alignment aids (3) for aligning the device (1) on a shell surface (21) of the blade angle bearing (20) of a rotor blade or a component connected thereto, and at least one laser module (5) spaced from the connecting plane (4) between the two alignment aids (3) for emitting a visible laser beam (6) such that the laser beam (6) intersects the connecting plane (4).This device (1) is used in the following steps: a) positioning the device (1) with its alignment aids (3) on a shell surface (21) of the blade angle bearing (20) of the rotor blade or a component associated therewith such that a laser beam (6) emanating from the device (1) strikes a hub marking (25) in the area of the device (1); b) fixing the device (1) in the position found; and c) moving the rotor blade until a laser beam (6) emanating from the device (1) strikes a rotor blade marking on the rotor blade.