Plasma Jet Casing Straight Channel Nozzle
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Solution Overview
Problem
Atmospheric-pressure plasma jet devices have limited processing efficiency and uniformity due to Gaussian plasma distribution and over-concentrated energy, leading to increased processing time and risk of electric arc damage to conductive workpieces.
Innovation Solution
A casing with a straight channel and an elliptical plasma nozzle tip is designed to increase plasma distribution range and uniformity, while redirecting the electric arc away from the workpiece outlet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If plasma is jetted through a conventional outlet, then plasma generation is achieved, but the plasma distribution range is limited and uniformity is poor
Solution Approach 1:
The patent introduces a straight channel that extends in a direction substantially perpendicular to the central axis of the casing, transforming the plasma ejection from a point-source radial distribution (conventional) to a linear directional distribution. This dimensional change allows plasma to cover a larger area with improved uniformity along the channel extension direction.
Solution Approach 2:
The straight channel is positioned asymmetrically relative to the central axis, with its extension axis separated from the central axis by a specific interval. This asymmetric configuration optimizes plasma distribution patterns to achieve both expanded coverage area and enhanced uniformity across the treatment surface.
2Productivity
If plasma is jetted with high speed for processing, then processing efficiency is improved, but electric arc damage to workpiece occurs
Solution Approach 1:
The straight channel acts as an intermediary structure between the plasma generation source and the workpiece. It guides and shapes the plasma flow in a controlled manner, maintaining high processing efficiency while distributing the plasma energy more evenly to prevent localized electric arc formation that would damage the workpiece.
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
Enhances processing efficiency and quality by expanding plasma distribution and uniformity, reducing processing time and preventing electric arc damage to workpieces.
Implementation Method 1
Plasma generated by the plasma jet system jets out through the straight channel
Implementation Method 2
Plasma generated by the atmospheric-pressure plasma jet device is jetted out with a high speed for processing the surface of a workpiece
Implementation Method 3
an electric arc is close to the outlet as the plasma is generated. When a to-be-processed object is a conductor, the electric arc easily acts on the to-be-processed object to damage the surface of the to-be-processed object
Implementation Method 4
the elliptical tip (113c) attracts the electric arc as result of the point effect, such that the electric arc acts at the point of the elliptical tip instead of acting at the outlet
Data Source
AI summary
A casing is used for being rotatably disposed in a plasma jet system. The casing is rotated around a central axis. The casing comprises a main body and a plasma nozzle. The main body has a first cavity. The plasma nozzle is disposed under the main body and has a second cavity and a straight channel. The second cavity is connected to the first cavity. The straight channel is located at a side of the plasma nozzle opposite to the main body and connected to the second cavity. The straight channel has an extension axis which is substantially parallel with the central axis and separated from the central axis by an interval. Plasma generated by the plasma jet system jets out through the straight channel.