Modular Wind Turbine Gearbox for Up-Tower Stage Serviceability
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Solution Overview
Problem
Conventional wind turbine gearbox maintenance requires on-ground crane operations, leading to time-consuming and costly procedures due to the need to remove the entire gearbox from the tower, which is inefficient and expensive.
Innovation Solution
A modular gearbox design with separate low-speed, intermediate-speed, and high-speed gear stage modules connected via flanges that allow for easy disassembly and up-tower repair, replacement, and inspection using an up-tower crane, enabling independent maintenance of each stage without replacing the entire gearbox.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the entire gearbox is removed from the tower for repair using an on-ground crane, then the gearbox can be fully serviced, but the procedure becomes time-consuming and expensive
Solution Approach 1:
The gearbox is divided into multiple independent stages (low-speed stage, intermediate-speed stage, high-speed stage) that can be separated from each other. Each stage is connected via flanges with attachment points that allow individual stages to be detached and serviced independently while remaining up-tower, eliminating the need to remove the entire gearbox for maintenance.
2Ease of repair
If the entire gearbox is removed from the tower for repair using an on-ground crane, then the gearbox can be fully serviced, but the cost increases
Solution Approach 1:
The gearbox is divided into multiple independent stages (low-speed stage, intermediate-speed stage, high-speed stage) that can be separated from each other. Each stage is connected via flanges with attachment points that allow individual stages to be detached and serviced independently while remaining up-tower, eliminating the need to remove the entire gearbox for maintenance.
3Ease of repair
If the entire gearbox is removed from the tower, then all components can be inspected, but the procedure becomes complex and time-consuming
Solution Approach 1:
The gearbox is divided into multiple independent stages (low-speed stage, intermediate-speed stage, high-speed stage) that can be separated from each other. Each stage is connected via flanges with attachment points that allow individual stages to be detached and serviced independently while remaining up-tower, eliminating the need to remove the entire gearbox for maintenance.
Solution Approach 2:
Individual gear stage modules are extracted from the overall gearbox assembly through the flange connections, allowing specific stages to be removed and serviced independently while the remaining stages stay installed in the tower, simplifying the repair procedure.
Data Source
AI summary
A modular gearbox assembly for a wind turbine having improved up-tower serviceability includes a low-speed gear stage module, a separate, intermediate-speed gear stage module adjacent to the low-speed gear stage module, and a separate high-speed gear stage module adjacent to the intermediate-speed gear stage module. The gearbox assembly also includes a first flange removably connecting the intermediate and high-speed gear stage modules and a second flange removably connecting the intermediate and low-speed gear stage modules. Thus, the low-speed gear stage module converts a low-speed, high torque input from a rotor shaft of the wind turbine to a high-speed, low torque output for a generator of the wind turbine via the intermediate and high-speed gear stage modules. In addition, the first and second flanges allow for easy disassembly of the gear stage modules such that the various stages can be easily repaired, replaced, and/or inspected.