Wind Turbine Transformer Replacement Using Exchange Traverse
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Solution Overview
Problem
The existing methods for replacing transformers in wind turbines require special mobile cranes with heavy-duty booms due to the limited door openings in the tower, making the process cumbersome and resource-intensive.
Innovation Solution
A method utilizing an exchange traverse with attachment points for a crane hook and a counterweight, allowing the transformer to be lifted and replaced without needing a special crane, by balancing the weight of the transformer with a counterweight or using the new transformer as a counterweight to simplify the insertion process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a special mobile crane with heavy-duty boom is used to replace the transformer, then the transformer can be lifted out through the limited door opening, but the equipment complexity and resource requirements increase significantly
Solution Approach 1:
The replacement process is divided into distinct phases: insertion of the traverse through the door opening, attachment of the transformer, balancing with counterweight, and extraction. This segmentation allows each phase to be optimized independently, using a standard crane rather than requiring a specialized heavy-duty crane throughout the entire process.
Solution Approach 2:
An exchange traverse acts as an intermediary device between the standard mobile crane and the transformer. The traverse with its attachment points and counterweight system mediates the lifting operation, enabling a standard crane to perform tasks that would otherwise require specialized equipment.
2Reliability
If a crane with heavy-duty jib is used, then the transformer can be lifted through the limited door opening, but the cost and resource intensity increase
Solution Approach 1:
A counterweight is attached to the exchange traverse to balance the weight of the transformer during the lifting operation. This counterbalancing mechanism reduces the load on the crane, allowing a standard mobile crane with fewer resources to perform the replacement reliably.
Solution Approach 2:
The exchange traverse is inserted through the door opening in a horizontal orientation, then rotated to a vertical orientation for lifting. This dimensional change allows the traverse to pass through the limited door opening while still providing sufficient lifting capacity for the transformer.
3Adaptability or versatility
If the exchange traverse is rotated 180 degrees, then the new transformer can be inserted through the door opening, but the positioning precision must be high
Solution Approach 1:
The exchange traverse is preliminarily positioned and attached to the transformer before the rotation operation. This preliminary attachment ensures that the transformer remains securely connected during the rotation, reducing the precision requirements for the rotation operation itself.
Solution Approach 2:
The exchange traverse is designed to be dynamically repositionable, allowing rotation from horizontal to vertical orientation. This dynamic capability enables the same traverse to perform multiple functions: insertion through the door opening, lifting the transformer, and insertion of the replacement transformer, with flexibility in positioning.
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
Enables the replacement of transformers using a standard mobile crane, reducing the need for heavy-duty equipment and simplifying the process, while accommodating transformers of varying weights through adjustable attachment points.
Implementation Method 1
An exchange traverse (300) is attached to a crane hook (510) via a first attachment point (310). The exchange traverse (300) has a first attachment point (310) for receiving the crane hook (510) of the mobile crane (500) and two further attachment points (320), to which the transformer (200) to be replaced and a counterweight (400) can be attached.
Implementation Method 2
A counterweight (400) is attached to the other second attachment point (320) at the second end (322). The weight of the balancing weight (400) preferably essentially corresponds to the weight of the transformer (200) to be replaced.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
What is provided is: a method for replacing a generator of a wind energy installation. In this case, the generator is provided in the interior of a tower of a wind energy installation and the tower (140) has a door opening (150). A replacement crossbeam (300) is fastened, via a first stop point (310), to a crane hook of a mobile crane (500). A first end of the replacement crossbeam (300) is inserted with a second stop point (320) through the door opening (150) into the tower (140). The transformer (220) to be replaced is fixed to the second stop point (320) of the first end (300). A compensating weight (400) is fixed to the second stop point (320) at the second end of the replacement crossbeam (300). The second end of the replacement crossbeam (300) is tipped or inclined until the transformer is at the height of the door opening (150), and the crane hook is moved until the transformer to be replaced is located outside the door opening (150).