Vacuum Tool for Gas Turbine Fairing Sheath Positioning

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Solution Overview

Problem

The existing methods for removing and installing fairing sheaths in gas turbine engines often cause damage due to mechanical deformation, which can lead to issues with clearance and structural integrity.

Innovation Solution

A tool utilizing vacuum pressure to grip and deform fairing sheaths, forming vacuum chambers to apply controlled suction and minimize mechanical stress, allowing for precise positioning and removal without damaging the sheath or adjacent components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If mechanical deformation methods are used to remove and install fairing sheaths, then the sheath can be repositioned, but damage occurs to the sheath and adjacent components

Engineering Contradiction:
Improvefairing sheath removal and installationVSAvoidstructural integrity of fairing sheath
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The patent replaces traditional mechanical deformation methods with a vacuum-based system. The tool uses vacuum chambers that create suction to grip and position the fairing sheath, eliminating the need for forceful mechanical deformation that causes damage to the sheath and adjacent components.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention employs vacuum pressure (a pneumatic principle) to achieve controlled gripping and positioning of the fairing sheath. The vacuum chambers create a suction force that holds the sheath without mechanical contact or deformation, allowing for safe removal and installation operations.

Inventive Principle:
Principle #29Pneumatics and hydraulics

2Manufacturing precision

If traditional mechanical tools are used to position fairing sheaths, then positioning can be achieved, but clearance issues arise due to deformation

Engineering Contradiction:
Improvefairing sheath positioning accuracyVSAvoidclearance between fairing sheath and adjacent components
Core Design Contradiction:
Manufacturing precisionVSLength of moving object

Solution Approach 1:

By replacing mechanical deformation tools with a vacuum-based positioning system, the patent achieves precise positioning without altering the physical dimensions or shape of the fairing sheath, thereby maintaining proper clearance with adjacent components.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention changes the fundamental parameter of force application from mechanical compression/deformation to vacuum suction. This parameter change allows positioning to occur without physical deformation of the sheath, preserving its original dimensions and clearance relationships.

Inventive Principle:
Principle #35Parameter changes

3Reliability

If vacuum pressure is applied to grip fairing sheaths, then mechanical stress is minimized, but the tool complexity increases

Engineering Contradiction:
Improvedamage prevention during positioningVSAvoidvacuum-based positioning tool
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The vacuum-based tool is divided into multiple independent vacuum chambers, each capable of gripping specific portions of the fairing sheath. This segmentation allows the complex function to be broken down into simpler, modular components that can be independently controlled and maintained.

Inventive Principle:
Principle #1Segmentation

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 vacuum-based tool effectively positions and removes fairing sheaths without causing damage, ensuring adequate clearance and preventing structural or electrical issues during installation and removal processes.

Implementation Method 1

A tool utilizing vacuum pressure to grip and deform fairing sheaths, forming vacuum chambers to apply controlled suction

Methodology Applied
Scientific EffectVacuum pressure: Vacuum

Data Source

PatentUS8393062B2Systems and methods for positioning fairing sheaths of gas turbine engines
Publication Date: 2013.03.12 RTX CORP
  • US8393062B2 patent drawing
  • US8393062B2 patent drawing
  • US8393062B2 patent drawing

AI summary

Systems and methods for positioning fairing sheaths are provided. In this regard, a representative method includes using vacuum pressure to assist in moving opposing portions of a fairing sheath away from each other.