Roll Stand Cooling Beam With Full-Jet Nozzles for Lower Pressure
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Solution Overview
Problem
Existing cooling devices for roll stands are inefficient in terms of energy consumption and maintenance due to high coolant pressures and rigid nozzle arrangements, which do not adapt well to location-dependent thermal loading of rolls.
Innovation Solution
A cooling device with full jet nozzles that discharge coolant jets with constant diameters, allowing for higher impact pressure and reduced energy consumption, and a modular design with separate coolant chambers for independent pressure control, enabling location-dependent cooling and easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high coolant pressure is used to achieve sufficient cooling effect, then cooling effectiveness is improved, but energy consumption increases
Solution Approach 1:
The invention changes the nozzle geometry parameters to produce full jet nozzles that discharge coolant in a concentrated, linear stream with constant diameter. This parameter change allows the coolant to maintain high impact pressure over longer distances, achieving sufficient cooling effectiveness at lower operating pressures compared to conventional fan jet nozzles, thereby reducing energy consumption.
Solution Approach 2:
The invention applies local quality by creating a concentrated coolant jet with specific geometric properties (constant diameter, linear flow) at the nozzle outlet. This localized concentration of coolant flow delivers high impact pressure precisely where needed on the roll surface, improving cooling effectiveness without requiring high overall system pressure.
2Temperature
If high coolant pressure is used to achieve sufficient cooling effect, then cooling effectiveness is improved, but operating costs increase
Solution Approach 1:
By changing the nozzle geometry to produce full jet nozzles with constant diameter discharge, the system achieves high cooling effectiveness at lower operating pressures. This parameter change directly reduces operating costs by decreasing the energy required to pump coolant through the system while maintaining adequate cooling performance.
3Device complexity
If rigid nozzle arrangements are used for cooling, then structural simplicity is improved, but adaptability to location-dependent thermal loading deteriorates
Solution Approach 1:
The cooling bar is segmented into multiple independent nozzle units, each capable of being individually adjusted or replaced. This segmentation allows different sections of the roll to receive customized cooling patterns according to their specific thermal requirements, improving adaptability while maintaining relatively simple overall structure.
Solution Approach 2:
The invention introduces dynamic adjustability to the nozzle arrangement, allowing the nozzle positions, orientations, or flow rates to be modified based on the thermal loading conditions of different roll sections. This dynamic capability enables the rigid structure to adapt to varying thermal conditions without complex redesign.
4Ease of manufacture
If conventional fan jet nozzles are used, then ease of manufacture is improved, but cooling effectiveness deteriorates due to low impact pressure
Solution Approach 1:
The invention modifies the nozzle geometric parameters to create full jet nozzles with constant diameter discharge, as opposed to the tapered geometry of conventional fan jet nozzles. This parameter change concentrates the coolant flow into a tighter stream, increasing impact pressure and cooling effectiveness while remaining manufacturable using standard machining processes.
5Temperature
If high coolant pressure is used, then cooling effectiveness is improved, but nozzle wear increases
Solution Approach 1:
By changing the operating pressure parameter to lower levels and compensating through optimized nozzle geometry (full jet design with constant diameter), the invention reduces the mechanical stress and erosive forces on the nozzle components. This extends nozzle service life and reduces wear while maintaining adequate cooling effectiveness through the concentrated jet pattern.
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
Significantly reduces energy consumption and operating costs while providing effective heat dissipation and adaptable cooling based on roll surface temperature, with reduced nozzle wear and simplified maintenance.
Implementation Method 1
full jet nozzles produce a higher impact pressure on the roll than conventionally used fan jet nozzles at the same coolant pressure
Implementation Method 2
coolant jets with a nearly constant jet diameter can be discharged from the cooling bar toward the roll
Data Source
AI summary
A cooling device (7) for cooling a roll (5) of a roll stand (1). The cooling device (7) includes a chilled beam (13) for receiving and discharging a coolant. The chilled beam (13) has multiple full jet nozzles (21) disposed on a discharge side (19) of the chilled beam (13), the side facing the roll (5) and extending parallel to a roll axis (17) of the roll (5). Through each of the full-jet nozzles, a jet of coolant having a nearly constant jet diameter can be sprayed from the chilled beam (13) towards the roll (5) in a discharge direction (23).