Helical Roller Cooling for Uniform Temperature Across Roll Width
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Solution Overview
Problem
Existing roller cooling systems for metal transport fail to achieve uniform temperature distribution across the roll width, leading to inhomogeneous heat transfer and unwanted deformation, which affects the quality of metal products.
Innovation Solution
A roller design with a helically wound coolant guide that varies flow characteristics across the roller width, allowing selective heat removal through varying coolant flow velocities and cross-sections to prevent radial bulging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If uniform cooling is applied across the roller width, then the overall temperature is reduced, but the roll center overheats due to higher heat transfer from metal product
Solution Approach 1:
The patent applies local quality by varying the coolant flow characteristics across different sections of the roller. The coolant guide is designed with different flow rates or cooling intensities for the roll center versus the roll ends, allowing each region to receive appropriate cooling tailored to its specific thermal conditions. This prevents the roll center from overheating while maintaining overall temperature control.
Solution Approach 2:
The cooling system is segmented into different zones across the roller width. The coolant guide divides the cooling function into multiple sections (roll center zone and roll ends zone), each with independent flow characteristics. This segmentation allows targeted cooling control in high-heat-transfer areas versus lower-heat-transfer areas, preventing thermal deformation.
2Loss of energy
If spiral cooling systems are used to intensify cooling, then heat dissipation is improved, but inhomogeneous temperature distribution persists across the roll width
Solution Approach 1:
The patent modifies the spiral cooling system by implementing local quality variations in the coolant guide design. Different sections of the spiral coolant guide have different flow characteristics, with the roll center receiving enhanced cooling compared to the roll ends. This local differentiation corrects the temperature distribution while maintaining high heat dissipation efficiency throughout the roller.
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
Ensures uniform temperature distribution and reduces thermal deformation of the roller, enhancing the quality of metal products by preventing radial bulges during transport.
Implementation Method 1
heat transfer from the metal product to the roll is often better there than at the roll ends
Implementation Method 2
the coolant is guided in a helical pattern beneath the roller shell from one end of the roller to the other
Implementation Method 3
due to the associated greater thermal expansion, can cause radial bulges ('ridges') in the roll center
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to a roller (1) for metal transport, a system (30) for processing metal, and a method (100) for cooling a roller (1) for metal transport. The roller (1) for metal transport comprises: i) a shaft (2) which is rotatably mounted at its two opposing shaft ends (2a, 2b); ii) a coolant guide (6) wound helically around the shaft (2); and iii) a jacket (4) encompassing the coolant guide (6) completely, such that the coolant guide (6) is arranged between the shaft (2) and the jacket (4). The coolant guide (6) is designed such that the flow characteristics (C) of a coolant flow (K) guided by the coolant guide (6) vary over a roller width (B).