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The bar rolling inlet guide and guard cooling system theoretical analysis and experimental research

Author: LuoFeiXia
Tutor: RenLiJun
School: Central South University
Course: Mechanical Design and Theory
Keywords: Guide and guard Cooling System Convective heat transfer coefficient Temperature field Finite Element Analysis
CLC: TG333.1
Type: Master's thesis
Year: 2005
Downloads: 64
Quote: 0
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Abstract


In the steel industry , rolling guide means is a key member of the rolling line , but only a few hours due to the work of the device under a relatively high temperature , cooling condition is very poor , resulting in the average life of the guide means , and wherein the most prominent issue is rolling inlet guide and guard , rolling inlet guide and guard the cooling system has important theoretical and practical significance . Guide and guard the cooling system of rolling inlet cooling parameters first theoretical design , in guide roller heat transfer analysis based on the use of the energy conservation of the basic physical laws of the guide roller convective heat transfer mathematical model to calculate the convective heat transfer coefficient for the design of the cooling system , based on the convection heat transfer coefficient has been determined , the application of fluid mechanics , velocity and flow formula calculates the cooling system required cooling water flow rate and flow strengthen the cooling in the form of heat transfer in a circular jet matrix design the injection aperture size and arrangement of the cooling system . Guide roller under the new cooling system then analyzes the thermal behavior of the heat exchange and thermal conductivity , necessary reasonable simplification guide roller for solving the two-dimensional transient temperature field model , to achieve a three-dimensional problem of two-dimensional simplify and ANSYS finite element software and high precision simulation of the guide roller transient temperature field , the results of the guide roller transient temperature field simulation proved theoretically that a new cooling system can achieve the desired cooling effect . Finally, in the steel mills of the new guide and guard the field application test , the test results show that : the design of the cooling system to produce a very good cooling effect , a substantial extension of the life of the guide and guard , reduce the labor intensity , improve production efficiency and reduce the cost of production , with good economic and social benefits .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Rolling > Rolling mill machinery equipment > Bodies and equipment of the mill primary columns
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