Roll Stand Cooling Beam With Solid Jet Nozzles
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Solution Overview
Problem
Existing roll stand cooling devices face inefficiencies in cooling effectiveness and energy consumption due to the use of flat jet nozzles, which require precise adjustment and result in high coolant pressure and maintenance costs.
Innovation Solution
The implementation of a cooling device with solid jet nozzles arranged on a cooling beam that emits coolant jets with a constant diameter, allowing for reduced coolant pressure and independent control of coolant flow to specific areas of the roll surface, along with a design that adapts to the roll's thermal load, reducing energy consumption and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If flat jet nozzles are used to cool the roll, then the coolant can be distributed over a wider area, but the impact pressure on the roll surface is reduced and higher coolant pressure is required
Solution Approach 1:
The nozzle design transitions from a uniform flat jet configuration to a configuration where the jet cross-section varies along its length, creating a solid jet with constant diameter that maintains concentrated cooling effect. Different sections of the jet have different qualities - the constant diameter section provides high impact pressure while the overall jet structure covers the required area.
Solution Approach 2:
The invention changes the geometric parameters of the jet, specifically maintaining a constant jet diameter along the jet length rather than allowing it to expand. This parameter change transforms the jet from a dispersed flat configuration to a concentrated solid jet, fundamentally altering the pressure distribution and cooling effectiveness.
2Temperature
If higher coolant pressure is used to increase impact pressure on the roll, then cooling effectiveness improves, but energy consumption increases
Solution Approach 1:
By changing the jet geometry to maintain constant diameter, the system achieves higher impact pressure at significantly lower coolant pressures. The concentrated jet configuration transforms the pressure-energy relationship, allowing effective cooling at reduced energy input.
Solution Approach 2:
The invention converts what would normally be energy loss through jet dispersion into beneficial concentrated impact. The jet configuration that would normally dissipate energy is redesigned to maintain concentration, turning potential energy waste into enhanced cooling effectiveness.
3Area of stationary object
If flat jet nozzles are used, then coolant distribution is broader, but the distance between spray bar and roller becomes critical and requires precise adjustment
Solution Approach 1:
The constant jet diameter parameter fundamentally changes the jet's behavior with respect to distance. The jet maintains its coherent structure and cooling effectiveness over a broader range of distances, eliminating the critical sensitivity to spray bar-to-roller spacing that characterizes flat jet configurations.
4Temperature
If higher coolant pressure is applied, then cooling performance improves, but nozzle wear and maintenance requirements increase
Solution Approach 1:
The jet geometry modification allows the system to achieve equivalent or superior cooling performance at lower operating pressures. This parameter change directly reduces the mechanical stress and erosive forces acting on the nozzle components, extending their service life and reducing maintenance frequency.
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
This solution enhances cooling efficiency by maintaining a consistent cooling effect across varying distances and temperatures, reduces energy consumption by lowering coolant pressure, and minimizes maintenance through reduced nozzle wear and simplified installation.
Implementation Method 1
Solid jet nozzles generate a higher impact pressure on the roller than commonly used flat jet nozzles due to the concentrated output of the coolant at the same coolant pressure in the cooling beam
Implementation Method 2
there is always a certain coolant film with a thickness of typically several millimeters to centimeters due to the overall large amount of coolant applied achieve good heat dissipation
Data Source
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AI summary
The invention relates to a cooling device (7) for cooling a roll (5) of a roll stand (1). The cooling device (7) comprises a cooling beam (13) for receiving and dispensing a coolant, the cooling beam (13) having a plurality of dispensing sides (19 ) of the chilled beam (13) has full jet nozzles (21) through which a coolant jet of the coolant can be discharged with an almost constant jet diameter from the chilled beam (13) in a delivery direction (23) to the roller (5).