Foreign Body Removal Tool With Airflow to Protect Cooling Holes
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Solution Overview
Problem
Existing foreign body removal devices for combustor components, such as those using needles or rotating brushes, risk blocking cooling through-holes with adhered dross, leading to reduced cooling efficiency in gas turbine engines.
Innovation Solution
A foreign body removing device equipped with a gripped tool featuring a blade and an airflow delivery system using compressed gas to crack and disintegrate adhered dross, preventing it from entering through-holes and ensuring efficient removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a needle or rotating brush is used to remove dross, then dross removal capability is improved, but cooling through-holes may be blocked by dislodged dross
Solution Approach 1:
The invention extracts the harmful dross from the workpiece surface using a blade that contacts and removes the dross, while simultaneously using compressed gas to extract and eject the removed dross away from the workpiece, preventing it from entering cooling through-holes
Solution Approach 2:
Compressed gas serves as an intermediary medium that contacts the blade and the removed dross, using the gas flow to carry the dislodged dross away from the workpiece surface and prevent it from blocking cooling through-holes
2Productivity
If compressed gas is supplied to contact the blade, then dross disintegration and removal efficiency is improved, but through-holes are protected from blockage
Solution Approach 1:
The invention uses compressed gas (pneumatics) to supply airflow that contacts the blade and the dross, enabling efficient dross disintegration and removal while simultaneously preventing dross from entering cooling through-holes by blowing it away
Solution Approach 2:
The invention replaces traditional mechanical dross removal methods (needle advancement, rotating brush contact) with a pneumatic system where compressed gas flows over the blade to contact and disintegrate dross, achieving both effective removal and through-hole protection
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 device effectively removes dross from combustor components without blocking cooling through-holes, maintaining or improving cooling efficiency by using compressed gas to disintegrate and blow away the foreign material.
Implementation Method 1
an airflow delivering portion configured to deliver compressed gas that has been supplied from the compressed gas supply source, as an airflow contacting the blade
Implementation Method 2
the foreign body is blown by the compressed gas (the airflow). Due to this blowing, even if a through-hole is formed in the workpiece, the foreign body is prevented from intruding into the through-hole
Data Source
AI summary
A foreign body removing device includes a foreign body removing tool for removing a foreign body that has adhered to a surface of a workpiece. This foreign body removing tool includes: a grip to be grasped by a worker; a blade that contacts the foreign body; and an airflow delivering portion for delivering compressed gas that has been supplied from a compressed gas supply source, as an airflow contacting the blade.