Plasma Torch Cooling System Segmentation for Electrode Wear Reduction
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Solution Overview
Problem
Existing plasma torch cooling systems are inefficient, leading to high electrode wear and reduced plasma density due to heated cooling gas returning to the striking area, resulting in lower cutting quality and increased maintenance needs.
Innovation Solution
A plasma torch with a hollow electrode and a gas cooling system that directs the cooling fluid through the electrode's inner cavity, ensuring it exits without affecting the striking area, thereby maintaining low temperature ionized gas for high-density plasma generation and reducing electrode wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cooling fluid is conveyed through the hollow electrode to cool it down, then the electrode wear is reduced, but the cooling fluid becomes heated and returns to the striking area reducing plasma density
Solution Approach 1:
The cooling system is segmented into separate pathways: a first pathway conveys cooling fluid through the hollow electrode for cooling, while a second pathway conveys ionized gas away from the striking area. This segmentation prevents the heated cooling fluid from contaminating the plasma generation zone, maintaining plasma density while still providing effective electrode cooling.
Solution Approach 2:
The heated cooling fluid is extracted from the system before it can return to the striking area. The patent provides pathways that guide the cooling fluid away from the plasma generation zone, removing the harmful thermal contamination and preventing the reduction of plasma density that would otherwise occur.
2Temperature
If the cooling system allows cooling fluid to circulate through the electrode, then electrode temperature is controlled, but cutting quality decreases due to heated gas in the striking area
Solution Approach 1:
The fluid pathways are segmented to separate the cooling function from the plasma generation function. The first pathway handles cooling fluid circulation through the electrode, while the second pathway handles ionized gas flow away from the striking area, ensuring that temperature control does not compromise cutting quality.
Solution Approach 2:
The heated cooling fluid is extracted and removed from the striking area before it can affect cutting quality. The patent's pathway configuration ensures that cooling fluid does not contaminate the plasma zone, maintaining both electrode temperature control and high cutting quality.
3Loss of energy
If the cooling fluid flows through the hollow electrode, then cooling efficiency is improved, but the heated cooling fluid returns to the striking area causing energy loss
Solution Approach 1:
The heated cooling fluid is extracted from the system through dedicated pathways that guide it away from the striking area. This extraction prevents the thermal energy contained in the heated cooling fluid from being lost back into the plasma generation zone, improving overall energy efficiency.
Solution Approach 2:
The patent converts the potentially harmful heated cooling fluid into a beneficial separated flow. By providing separate pathways, the heated cooling fluid is directed away from the striking area where it could cause energy loss, while still maintaining its useful cooling function within the electrode.
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 improved cooling system enhances plasma density, reduces electrode wear, and increases cutting speed and quality, requiring fewer maintenance operations and extending electrode lifespan.
Implementation Method 1
a gas cooling system configured to convey a cooling fluid into the inner cavity of the hollow electrode to cool down the hollow electrode
Implementation Method 2
the cooling fluid is ejected from the torch after flowing through the inner cavity of the electrode
Implementation Method 3
The device generates a plasma flow which exits from a nozzle following the application of a suitable difference in potential and the striking of the arc between the two electrodes between which a carrier gas, typically air, flows. The carrier gas is subjected to ionization in order to generate said plasma.
Implementation Method 4
the generation of an electric arc between two electrodes, known as cathode and anode
Data Source
AI summary
A plasma torch includes a first element provided with a through opening for the exit of a plasma flow, and a hollow electrode which develops longitudinally along a main axis and can be positioned with respect to the first element in such a way as to define a striking area. The hollow electrode includes an inner cavity which extends at least partially along the main axis and a main conveyance way suited to convey a carrier gas. The torch includes a first divider suited to divide the main way into a first conveyance way suited to convey a portion of the carrier gas from the main way towards the striking area and into a second conveyance way suited to convey a portion of the carrier gas from the main way towards the inner cavity of the hollow electrode, the portion of carrier gas of the second way being suited to cool down the hollow electrode, and a second divider arranged downstream of the first divider, suited to divide the first way into a third conveyance way suited to convey a portion of the carrier gas from the first way towards the striking area and into a fourth conveyance way suited to convey a portion of the carrier gas from the first way towards the first element, the portion of carrier gas of the fourth way being suited to cool down the first element.