Metal Strip Cooling Nozzle Layout for Uniform Temperature Distribution
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Solution Overview
Problem
Existing gas jet cooling apparatuses for metal strips fail to adequately equalize temperature distribution after cooling, leading to non-uniformity.
Innovation Solution
A cooling apparatus with staggered arrays of nozzles on both sides of the metal strip, where the nozzles are offset in both width and longitudinal directions, with a shift amount S = m×ΔXn/2, where m is an odd number, to align nozzle centers within an elliptical region, ensuring equidistant spacing and reducing overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If nozzles are arranged in staggered arrays with offset positions, then temperature distribution uniformity is improved, but device complexity increases
Solution Approach 1:
The nozzle array is divided into multiple independent groups, each group forming a staggered array with specific pitch relationships. The nozzles are segmented into first nozzles and second nozzles with different positioning patterns, allowing complex cooling patterns to be built from simpler modular units. This segmentation enables the system to achieve uniform temperature distribution while maintaining manageable device complexity through modular design.
Solution Approach 2:
Different regions of the nozzle array have locally optimized characteristics. The first nozzles and second nozzles have different pitch relationships with the metal strip, creating locally varied cooling patterns that collectively achieve global uniformity. The offset positioning creates local differences in cooling intensity that balance out to produce overall temperature uniformity across the strip surface.
2Quantity of substance
If multiple nozzle rows are added to improve cooling coverage, then cooling effectiveness increases, but temperature non-uniformity increases
Solution Approach 1:
The nozzle rows are arranged asymmetrically with respect to the metal strip centerline. The first nozzles and second nozzles have different pitch values (X1, Y1) and (X2, Y2) respectively, creating asymmetric cooling patterns that prevent periodic temperature variations. This asymmetric arrangement ensures that as more nozzle rows are added to increase cooling coverage, the temperature distribution remains uniform rather than developing non-uniform patterns.
3Manufacturing precision
If nozzles are positioned closer together to reduce periodicity, then cooling uniformity improves, but manufacturing difficulty increases
Solution Approach 1:
The pitch relationships between nozzles and the metal strip are designed to create equipotential cooling conditions. The specific pitch ratios (X1/Y1) and (X2/Y2) are selected to ensure that cooling intensity is evenly distributed across the strip surface. This equipotential design approach simplifies manufacturing by providing clear, standardized pitch relationships that are easier to manufacture with standard tolerances compared to arbitrary close-spaced arrangements.
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 equalizes temperature distribution across the metal strip, maintaining uniformity even with increased nozzle rows, reducing non-uniformity and periodicity in both width and longitudinal directions.
Implementation Method 1
the metal strip is cooled by jet (gas jet) of a cooling gas
Data Source
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AI summary
A cooling device for a metal plate includes a plurality of first nozzles and a plurality of second nozzles disposed on both sides of the metal plate, respectively, in a thickness direction of the metal plate across a pass line of the metal plate. The plurality of first nozzles form a staggered array in which a pitch in a width direction of the metal plate is Xn, a pitch in a longitudinal direction of the metal plate is Yn, and an offset amount in the width direction of a pair of first nozzles disposed adjacent to each other in the longitudinal direction is ΔXn. The plurality of second nozzles form a staggered array in which a pitch in the width direction is Xn, a pitch in the longitudinal direction is Yn, and an offset amount in the width direction of a pair of second nozzles disposed adjacent to each other in the longitudinal direction is ΔXn. The staggered array of the first nozzles and the staggered array of the second nozzles are disposed offset from each other such that, a center of the second nozzle is at a position offset by a shift amount S from a center of the first nozzle in the width direction, and the center of the second nozzle is positioned in a region defined by an oval having a semi-axis of ΔXn/4 in the width direction and a semi-axis of Yn/3 in the longitudinal direction. The shift amount S is expressed by S = m × ΔXn/2, where m is an odd number such that S is closest to Xn/2.