Manual Lifting Tool for Wind Turbine Nacelle Maintenance
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Solution Overview
Problem
Wind turbines face challenges in performing maintenance on heavy components without external cranes, as internal cranes require electric supply and are not feasible when the turbine is de-energized or in commissioning mode.
Innovation Solution
A manually operated linear actuator apparatus with a mounting device, comprising power screw linear actuators and torque reducers, allows for manual lifting and supporting of wind turbine components within the nacelle, using hand cranks or portable drills, and can be synchronized for improved control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If internal cranes are used for lifting heavy components, then lifting capability is improved, but dependency on electric supply increases
Solution Approach 1:
The patent replaces electric-powered internal cranes with manually operated mechanical lifting tools. The lifting device uses a rack and pinion mechanism where a motorless pinion gear engages with a vertical rack on the boom, allowing manual rotation of the pinion to lift and position heavy components without requiring electric power supply to the nacelle.
Solution Approach 2:
The lifting device is designed to be self-contained and manually operable, with all necessary mechanical components (rack, pinion, boom, attachment means) integrated into a single system that can function independently of external electric infrastructure. The operator directly controls the lifting action through manual rotation of the pinion gear.
2Force
If external cranes are used for maintenance, then lifting capability is improved, but availability and cost worsen
Solution Approach 1:
The manually operated lifting device serves multiple maintenance functions within the wind turbine nacelle. It can lift and position various heavy components including generator parts, gearbox components, and transformer elements, replacing the need for external cranes for multiple different maintenance scenarios.
Solution Approach 2:
The lifting device acts as an intermediary mechanism between the operator and heavy components. The rack and pinion system provides mechanical advantage, allowing a human operator to generate sufficient lifting force through manual rotation, bridging the gap between human capability and the weight of turbine components.
3Use of energy by moving object
If manually operated linear actuators are used, then electric supply independence is improved, but lifting force capability worsens
Solution Approach 1:
The pinion gear uses a circular (spheroidal in 3D) geometry to engage with the vertical rack. This curved geometry provides continuous contact and mechanical advantage throughout the rotation, enabling the operator to generate sufficient lifting force through manual rotation while maintaining electric supply independence.
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 maintenance operations on wind turbine components without electric power, providing a cost-effective and accessible solution for supporting and lifting heavy components, such as transformer feet or nacelle doors, reducing reliance on external cranes.
Implementation Method 1
said manually operated linear actuator is a power screw linear actuator
Data Source
AI summary
An apparatus for performing a supporting and/or a lifting operation to a wind turbine component inside the wind turbine nacelle is provided. The apparatus comprises at least a tool which comprises a manually operated linear actuator and a mounting device of said linear actuator in an element of the nacelle frame so that said linear actuator can be duly located with respect to the wind turbine component for performing said supporting and/or lifting operation.