Vortex Tube Cooling for Laser Head Temperature Control
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Solution Overview
Problem
Conventional water-cooled power laser cutting and welding installations face challenges in applications like nuclear dismantling due to complex setup requirements and potential leaks, which restrict their use and lead to overheating of the laser head, reducing performance and longevity.
Innovation Solution
A laser cutting/welding installation utilizing a compressed gas-based vortex tube cooling system, which minimizes heating by producing both cold and hot gas streams to efficiently cool the laser head, allowing for high-power operations without water and enabling improved cutting/welding performance and flexibility in various applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If water cooling is used to cool the laser head, then the laser head temperature is controlled, but the installation becomes complex and unsuitable for certain applications
Solution Approach 1:
The patent replaces water cooling with compressed air cooling through vortex tubes. The compressed air is transformed into cold gas streams that cool the laser head, eliminating the need for water pumps, sealed circuits, and leak prevention systems while maintaining effective temperature control
Solution Approach 2:
The patent substitutes the mechanical water cooling system with a pneumatic vortex tube system. The vortex tubes use compressed air and generate cold gas through aerodynamic effects, replacing the need for mechanical pumps and complex hydraulic circuits
2Temperature
If water cooling is used, then the laser head can be cooled, but leaks can have serious consequences and generate waste
Solution Approach 1:
The patent uses compressed air as the cooling medium instead of water. Compressed air is inert, non-contaminating, and eliminates the risks of leaks causing damage or generating waste. The air-based system is particularly suitable for nuclear sites and environments where water contamination would be problematic
Solution Approach 2:
The patent employs compressed air, an abundant and inexpensive resource, as the cooling medium. Air can be continuously supplied without the need for expensive water treatment systems or waste management infrastructure, making the system more economical and environmentally friendly
3Productivity
If high laser power is used for long periods, then cutting/welding performance is improved, but the laser head overheats and deteriorates
Solution Approach 1:
The patent implements continuous compressed air supply to the vortex tubes, ensuring uninterrupted cold gas flow to the laser head. This continuous cooling action enables the laser to operate at high power levels for extended periods without temperature accumulation or deterioration
Solution Approach 2:
The patent transforms compressed air into cold gas with significantly reduced temperature through the vortex tube effect. This parameter change from ambient temperature air to sub-ambient cold gas provides sufficient cooling capacity to handle high laser power operations without thermal damage
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 solution effectively reduces the risk of overheating, enhances cutting/welding performance, and allows for the use of high laser powers over extended periods, enabling efficient cutting of thick materials and increased tolerance in positioning, particularly beneficial for site-specific applications like nuclear dismantling.
Implementation Method 1
several vortex tubes whose known operating principle is relatively simple. Indeed, a compressed gas is injected radially into a device made for example of aluminum or steel, in order to be able to be divided into two separate gas streams. Within this device, a transfer of kinetic energy in the form of heat is generated between the two gas streams, which makes it possible to have on the one hand a hot gas stream escaping through a gas outlet hot, and on the other hand a flow of cold gas escaping through a cold gas outlet
Data Source
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AI summary
The invention concerns a laser cutting/welding installation comprising a laser head (2) capable of delivering a laser beam designed to generate a melting bath (74), the installation also comprising a device for cooling (21) the laser head. The invention is characterized in that said cooling device comprises at least one vortex tube (40) supplied with compressed gas, the tube (50) being provided with at least one cold gas outlet (54) connected to the laser head (2) to cool same, as well as at least one hot gas outlet (56).