Cammed Rotor Lock Pin for Easier Wind Turbine Maintenance
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Solution Overview
Problem
Existing lock mechanisms for wind turbine rotors are cumbersome, difficult to install, and often require mounting on the component to be replaced or repaired, making it challenging to prevent rotor rotation during maintenance.
Innovation Solution
A rotor lock system featuring pin supports with rotatable lock pins and a turnbuckle mechanism that securely engages with existing rotor lock apertures on the hub, allowing for easy installation and use, regardless of the turbine component being replaced or repaired, utilizing a cammed portion to wedge the lock pins in place and prevent rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing lock mechanisms are used to prevent rotor rotation, then the rotor can be locked down, but the locks are cumbersome and difficult to install
Solution Approach 1:
The lock mechanism is divided into separate components: a lock pin that can be independently inserted into the rotor hub aperture, and a separate actuating mechanism. This segmentation allows the lock pin to be pre-positioned and then secured independently, simplifying the installation process while maintaining reliable rotor locking.
Solution Approach 2:
The lock pin is extracted as a separate, removable component from the main locking mechanism. This allows the lock pin to be inserted into the rotor hub aperture independently and then secured by the actuating mechanism, making installation easier while ensuring reliable rotor immobilization.
2Reliability
If existing locks are mounted on the component to be replaced or repaired, then the rotor can be locked, but the installation becomes more difficult
Solution Approach 1:
The lock mechanism is designed with a universal mounting interface that can be attached to the nacelle structure in a fixed position, independent of which rotor component needs replacement. The lock pin can engage with standard apertures in the rotor hub, making the system universally applicable to different maintenance scenarios without requiring custom mounting for each component.
Solution Approach 2:
The lock mechanism uses an intermediary mounting structure that attaches to the nacelle rather than directly to the rotor component. This intermediary mounting simplifies installation by providing a fixed reference point, while the lock pin acts as a mediator to transfer the locking action to the rotor hub aperture.
3Reliability
If a secure lock mechanism is implemented, then the rotor can be reliably immobilized, but the installation process becomes more complex
Solution Approach 1:
The actuating mechanism is designed to automatically secure the lock pin in place once inserted into the rotor hub aperture. The mechanism may include self-latching features or automatic engagement components that eliminate the need for complex manual securing operations, thereby maintaining reliable rotor immobilization while simplifying the installation process.
Solution Approach 2:
The lock pin is designed to be pre-positioned in the correct orientation and location before final engagement with the rotor hub aperture. This preliminary positioning ensures proper alignment, and the subsequent securing action is simplified because the complex alignment work has already been done, reducing overall installation complexity while maintaining secure rotor locking.
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 rotor lock system effectively immobilizes the rotor, ensuring safe and efficient maintenance by providing a secure and user-friendly solution that can be applied universally across different turbine components, reducing installation complexity and ensuring effective locking.
Implementation Method 1
rotation of the lock pin causing engagement of an exterior surface of the cammed portion with an interior surface of the aperture to immobilize the lock pin against the interior surface of the aperture
Data Source
AI summary
A lock for preventing rotation of a rotor of a wind turbine has a rotatable lock pin, a pin support supportable in a nacelle of the wind turbine and a mechanism for rotating the lock pin. The pin support has a hub-facing face proximate a rotor hub. The rotatable lock pin is rotatably mounted on the pin support. The lock pin has a cammed portion extending away from the hub-facing face toward the hub. The lock pin inserted into a complementary rotor lock aperture on the rotor hub when the pin support is supported in the nacelle. Rotation of the lock pin causes engagement of an exterior surface of the cammed portion with an interior surface of the rotor lock aperture to immobilize the lock pin against the interior surface to prevent relative motion between the lock pin and the aperture to prevent rotation of the rotor.