Slew Ring Repair Tool for Wind Turbines
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Solution Overview
Problem
Existing solutions for repairing and maintaining slew rings on wind turbines are inefficient, as they often require removing the entire turbine for replacement, which is costly and limits access for maintenance.
Innovation Solution
A tool system with a drive mechanism, stabilizing body, and grinder is used for in-situ resurfacing of slew rings, allowing for up-tower repair and damage prevention, including components like magnets or suction devices for debris removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the entire turbine is removed for slew ring replacement, then the slew ring can be replaced, but the cost increases and maintenance access is limited
Solution Approach 1:
The repair system is divided into separate functional modules: a drive mechanism, a stabilizing body with stabilizing members, a grinder, and debris removal devices. This segmentation allows each component to be independently optimized and assembled in a compact configuration that can access the slew ring without removing the entire turbine.
Solution Approach 2:
The stabilizing body acts as an intermediary structure that provides a stable platform for the grinder to operate on the slew ring. The stabilizing members extend from the stabilizing body to engage with the turbine structure, creating a stable working platform that enables precision grinding while the turbine remains in place.
2Ease of operation
If the turbine is removed for slew ring maintenance, then the slew ring can be accessed, but downtime increases and costs increase
Solution Approach 1:
The stabilizing members are configured to be adjustable and adaptable to different turbine configurations. The stabilizing body can be positioned and secured in various locations on the turbine structure, allowing the system to dynamically adapt to different maintenance scenarios without requiring turbine removal.
Solution Approach 2:
The repair system is designed with multi-functional capabilities: the stabilizing body provides both structural support and positioning functions, the grinder can resurface the slew ring, and the debris removal devices can clear away particles. This multi-functionality allows the entire repair operation to be performed in-situ without requiring multiple separate operations or turbine removal.
3Ease of manufacture
If in-situ resurfacing is performed, then maintenance cost decreases, but debris generation occurs
Solution Approach 1:
The debris removal devices are integrated directly with the stabilizing body, merging the grinding operation and debris removal into a single coordinated system. This allows debris to be removed continuously during the grinding process, preventing accumulation that could interfere with the resurfacing operation or create safety hazards.
Solution Approach 2:
The system converts the harmful effect of grinding debris into a manageable byproduct by incorporating dedicated debris removal devices. The debris is actively removed and can be collected or disposed of, transforming what would be a contaminant into a controlled material flow that does not interfere with the repair 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
Enables efficient, cost-effective repair and maintenance of slew rings without removing the turbine, reducing downtime and maintenance costs while preventing damage.
Implementation Method 1
a grinder disposed on a distal end of the shaft and configured to engage the slew ring
Implementation Method 2
including components like magnets or suction devices for debris removal
Implementation Method 3
including components like magnets or suction devices for debris removal
Data Source
AI summary
A system for slew ring repair includes a drive mechanism and a tool coupled thereto. The tool may include a fixture structurally configured to secure the tool to a frame on a top end of a wind tower, and a rotatable shaft having a proximal end and a distal end, where the proximal end is coupled to the drive mechanism and the distal end is structurally configured to insert within a housing on the top end of the wind tower that contains a slew ring of a wind turbine disposed on the wind tower. The tool may further include a grinder disposed on the distal end of the rotatable shaft, where the grinder is structurally configured to engage the slew ring while being rotated by the drive mechanism for repair or maintenance of the slew ring.