WO2009093806A2 - Cooling roll for crown control of roll and control method thereof - Google Patents

Cooling roll for crown control of roll and control method thereof Download PDF

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Publication number
WO2009093806A2
WO2009093806A2 PCT/KR2008/007259 KR2008007259W WO2009093806A2 WO 2009093806 A2 WO2009093806 A2 WO 2009093806A2 KR 2008007259 W KR2008007259 W KR 2008007259W WO 2009093806 A2 WO2009093806 A2 WO 2009093806A2
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WO
WIPO (PCT)
Prior art keywords
module
roll
external module
temperature portion
electric current
Prior art date
Application number
PCT/KR2008/007259
Other languages
French (fr)
Other versions
WO2009093806A3 (en
Inventor
Jong-Bin Lee
Hyuck-Cheol Kwon
Sang-Seok Kim
Gyoo-Taek Lee
Original Assignee
Posco
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Filing date
Publication date
Application filed by Posco filed Critical Posco
Priority to CN2008801227354A priority Critical patent/CN101909773B/en
Priority to JP2010540560A priority patent/JP5378407B2/en
Publication of WO2009093806A2 publication Critical patent/WO2009093806A2/en
Publication of WO2009093806A3 publication Critical patent/WO2009093806A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/08—Lubricating, cooling or heating rolls internally
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
    • H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
    • H10N10/17—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the present invention relates to a cooling roll for controlling roll crown and a control method thereof, and more particularly, to a cooling roll used in an internal cooling system using thermoelectric modules, and a control method thereof.
  • FIG. 1 is a perspective view illustrating a conventional roll.
  • a roll 1 in a casting process or a rolling process, a roll 1 is thermally expanded by heat generated by friction between the roll 1 and a material 2, or heat transferred from the material 2. This thermal expansion affects a thickness of each product, which, in turn, degrades the quality of products.
  • the internal cooling system which is widely used in the casting process, includes a cooling circuit formed of pipes in an inner part of the roll 1. This cooling method is conducted by injecting cooling liquid (generally, water) into a cooling circuit to cool the inner part of the roll 1.
  • the external cooling system includes a plurality of spray nozzles.
  • the roll 1 is cooled from an outer surface to an inner part thereof by directly spraying the roll 1 with cooling liquid.
  • FIG. 2 is a perspective view illustrating conventional cooling rolls of (a) an internal cooling system and (b) an external cooling system, respectively.
  • the roll 1 essentially has a space through which fluid can be passed in the case of the internal cooling system.
  • the roll 1 may be deformed by loads in an operation in which large loads are applied to the roll 1, for example, a rolling process. Therefore, there are limitations in the use of the roll 1. Also, it is impossible to control a shape of a surface of the roll 1 since a temperature of cooling liquid 4 flowing in a cooling pipe 3 is not easily changed in each part of the roll 1.
  • the increase in temperature of the inner part of the roll 1 is not controlled in the case of the external cooling system. Therefore, when the external cooling system is operated for a long time, the central region of the roll 1 is also changed in temperature. In this case, it takes much time to cool the central region of the roll 1 when only a surface of the roll 1 is cooled by spraying the surface of the roll 1 with cooling liquid 4 through a spray nozzle 5. Therefore, the external cooling system has a slow cool-down response.
  • FIG. 3 is a perspective view illustrating a conventional thermoelectric module.
  • thermoelectric module includes a p-type semiconductor 6, an n- type semiconductor 7, a metal sheet- type high temperature portion 8 and a metal sheet- type low temperature portion 9.
  • ®* pn represents a Seebeck coefficient
  • I represents an electric current
  • TH represents a temperature of a metal sheet- type high temperature portion 8
  • TC represents a temperature of a metal sheet- type low temperature portion 9
  • K represents a thermal conductivity coefficient
  • r represents resistivity.
  • the above-mentioned conventional cooling system has a problem in that it is impossible to cool a roll while maintaining strong resistance to compressive deformation. Also, the conventional cooling system has problems in that it is impossible to suppress the formation of roll crowns, caused by the thermal expansion, with a rapid response time, and also impossible to control shapes of a material surface to a desired shape.
  • An aspect of the present invention provides a cooling roll of an internal cooling system capable of cooling a roll while maintaining strong resistance to compressive deformation, and a control method thereof.
  • Another aspect of the present invention provides a cooling roll capable of suppressing formation of roll crowns, caused by the thermal expansion, with a rapid response time, and also easily controlling shapes of a material surface to a desired shape, and a control method thereof.
  • a cooling roll for controlling roll crown including a heat sink; an internal module comprising multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the heat sink, formed in a longitudinal direction; and an external module comprising multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the internal module, in a longitudinal direction, wherein the internal module transfers electric current, which is transferred from a surface of the external module, to the heat sink.
  • the external module may control the respective quantity of electric current flowing in each of multiple layers, respectively.
  • the external module may include a high temperature portion which is an outer portion of the external module; and a low temperature portion which is a inter portion of the external module and is arranged between the high temperature portion and the internal module, wherein the high temperature portion transfers electric current, which is transferred from a surface of the external module, to the low temperature portion.
  • each of the internal module and the external module comprise a plurality of unit rings stacked in the longitudinal direction, each unit ring comprising thermoelectric modules in the form of a ring.
  • the heat sink and the internal module are insulated from each other by a insulator, and the internal module and the external module are insulated from each ot her by a insulator.
  • a control method of a cooling roll for controlling roll crown comprises: transferring electric current from a surface of an external module to an internal module comprising multiple layers of the thermoelectric modules, in which the thermoelectric modules are stacked inside of the external module in a longitudinal direction; and transferring electric current from the internal module to a heat sink provided inside of the internal module.
  • control method may further comprises: transferring electric current from the surface of the external module to a high temperature portion which is an outer portion of the external module; and transferring electric current from the high temperature portion to a low temperature portion arranged between the high temperature portion and the internal module.
  • the cooling roll for controlling roll crown may be useful to control the roll crown, which is caused by the thermal expansion, with a rapid response time since the roll is cooled with the internal cooling system.
  • the cooling roll for controlling roll crown may be useful to control a surface shape of a strip by changing a surface shape of the roll since the thermoelectric modules are arranged so that their temperatures can be independently controlled in a longitudinal direction of the roll.
  • the p-n elements may be used when large loads are applied to the roll since the p-n elements are made of ceramic and strongly resistant to the compressive loads.
  • FIG. 1 is a perspective view illustrating a conventional roll.
  • FIG. 2 is a perspective view illustrating conventional cooling rolls of (a) an internal cooling system and (b) an external cooling system, respectively.
  • FIG. 3 is a perspective view illustrating a conventional thermoelectric module.
  • FIG. 4 is an exploded perspective view illustrating a cooling roll for controlling roll crown according to one exemplary embodiment of the present invention.
  • FIG. 5 is an exploded perspective view illustrating (a) a unit ring of an external module in the cooling roll for controlling roll crown; and (b) an assemblage of unit rings stacked in a longitudinal direction according to one exemplary embodiment of the present invention.
  • FIG. 6 is a perspective view illustrating an assemblage of an external module and an internal module of the cooling roll for controlling roll crown according to one exemplary embodiment of the present invention.
  • FIG. 4 is an exploded perspective view illustrating a cooling roll for controlling roll crown according to one exemplary embodiment of the present invention.
  • the cooling roll for controlling roll crown is widely composed of a heat sink 12, an internal module 11 and an external module 10.
  • the internal module 11 includes multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the heat sink 12 in a longitudinal direction.
  • the external module 10 includes multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the internal module 11 in a longitudinal direction. Also, the heat sink 12 and the internal module 11 are insulated from each other by a insulator, and the internal module 11 and the external module 10 are insulated from each other by a insulator.
  • the internal module 11 transfers electric current, which is transferred from a surface of the external module 10, to the heat sink 12.
  • the external module 10 functions to control the respective quantity of electric current flowing in each of the multiple layers, respectively.
  • Electric current is transferred from a surface of the external module 10 to the internal module 11 including multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked inside of the external module 10 in a longitudinal direction. Referring to this operation, electric current is transferred from the surface of the external module 10 to the high temperature portion 10a which is an outer portion of the external module 10, and electric current is then transferred from the high temperature portion 10a to the low temperature portion 10b arranged between the high temperature portion 10a and the internal module 11.
  • FIG. 5 is an exploded perspective view illustrating (a) a unit ring of an external module in the cooling roll for controlling roll crown; and (b) an assemblage of unit rings stacked in a longitudinal direction according to one exemplary embodiment of the present invention.
  • FIG. 5 (a) shows an external module 10 that is formed in a double stack manner.
  • the external module 10 includes a high temperature portion 10a and a low temperature portion 10b.
  • the high temperature portion 10a is an outer portion of the external module 10
  • the low temperature portion 10b is a inter portion of the external module 10. That is, the high temperature portion 10a of the external module 10 faces a surface of the cooling roll, and the low temperature portion 10b of the external module 10 is arranged between the high temperature portion 10a and the internal module 11.
  • One ring of the external module 10 is referred to as a unit ring that controls the respective quantity of electric current.
  • the external module 10 has a structure in which an outer high temperature portion 10a and a inter low temperature portion 10b are coupled to each other to form a unit ring, and the unit rings are stacked in a longitudinal direction. Since the unit rings of the external module 10 are formed as dependent units in a longitudinal direction as described above, the respective quantity of electric current flowing in each unit ring may be controlled independently. Therefore, the unit rings having different temperatures may be distributed along a longitudinal direction of the cooling roll. [61]
  • FIG. 6 is a perspective view illustrating an assemblage of an external module and an internal module of the cooling roll for controlling roll crown according to one exemplary embodiment of the present invention.
  • the internal module 11 includes thermoelectric modules stacked in a longitudinal direction, and coupled to the low temperature portion 10b of the external module 10 and the heat sink 12. Both the external module 10 and the internal module 11 include thermoelectric modules that are stacked in the formed of a ring.
  • the internal module 11 transfers heat, which is transferred from the surface of the cooling roll to the inside of the cooling roll by the external module 10, back to the heat sink 12.
  • the heat sink 12 is installed in one or both sides of the cooling roll.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Control Of Metal Rolling (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

There is provided a cooling roll for crown control of roll and a control method thereof. The cooling roll for crown control of roll comprises a heat sink; an internal module comprising multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the heat sink in a longitudinal direction; and an external module comprising multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the internal module in a longitudinal direction, wherein the internal module transfers electric current, which is transferred from a surface of the external module, to the heat sink.

Description

Description
COOLING ROLL FOR CROWN CONTROL OF ROLL AND CONTROL METHOD THEREOF
Technical Field
[1] The present invention relates to a cooling roll for controlling roll crown and a control method thereof, and more particularly, to a cooling roll used in an internal cooling system using thermoelectric modules, and a control method thereof.
[2]
Background Art
[3] FIG. 1 is a perspective view illustrating a conventional roll. Referring to FIG. 1, in a casting process or a rolling process, a roll 1 is thermally expanded by heat generated by friction between the roll 1 and a material 2, or heat transferred from the material 2. This thermal expansion affects a thickness of each product, which, in turn, degrades the quality of products.
[4] Conventional cooling methods, which have been used to prevent the thermal expansion of the roll 1, are divided into an internal cooling system and an external cooling system. The internal cooling system, which is widely used in the casting process, includes a cooling circuit formed of pipes in an inner part of the roll 1. This cooling method is conducted by injecting cooling liquid (generally, water) into a cooling circuit to cool the inner part of the roll 1. The external cooling system includes a plurality of spray nozzles. Here, the roll 1 is cooled from an outer surface to an inner part thereof by directly spraying the roll 1 with cooling liquid.
[5]
[6] FIG. 2 is a perspective view illustrating conventional cooling rolls of (a) an internal cooling system and (b) an external cooling system, respectively.
[7] Referring to FIG. 2 (a), the roll 1 essentially has a space through which fluid can be passed in the case of the internal cooling system. In this case, the roll 1 may be deformed by loads in an operation in which large loads are applied to the roll 1, for example, a rolling process. Therefore, there are limitations in the use of the roll 1. Also, it is impossible to control a shape of a surface of the roll 1 since a temperature of cooling liquid 4 flowing in a cooling pipe 3 is not easily changed in each part of the roll 1.
[8] Referring to FIG. 2 (b), the increase in temperature of the inner part of the roll 1 is not controlled in the case of the external cooling system. Therefore, when the external cooling system is operated for a long time, the central region of the roll 1 is also changed in temperature. In this case, it takes much time to cool the central region of the roll 1 when only a surface of the roll 1 is cooled by spraying the surface of the roll 1 with cooling liquid 4 through a spray nozzle 5. Therefore, the external cooling system has a slow cool-down response.
[9]
[10] FIG. 3 is a perspective view illustrating a conventional thermoelectric module.
Referring to FIG. 3, thermoelectric module includes a p-type semiconductor 6, an n- type semiconductor 7, a metal sheet- type high temperature portion 8 and a metal sheet- type low temperature portion 9.
[11] When electric current flows from the n-type semiconductor 7 to the metal sheet- type low temperature portion 9, internal conduction electrons are transferred from a metal sheet to the n-type semiconductor 7. Here, the mean kinetic energy of the internal conduction electrons is increased. In this case, the changes in kinetic energy are caused by the thermal absorption. When the electric current flows in a reverse direction, the exothermic reaction occurs with a decrease in the kinetic energy of conduction electrons.
[12] Since the flow of holes in the junction between the metal and the p-type semiconductor 6 is matched with that of the electric current, the endothermic and exothermic reactions occur in an opposite direction in respect to the direction of electric current in the junction between the metal and the n-type semiconductor 7. On the basis of this principle, when electric current flows in a module, heat may be transferred from the metal sheet-type high temperature portion 8 to the metal sheet- type low temperature portion 9. The total amount of transferred heat(Qtotal) is determined by the following Equation 1.
[13]
[14] Equation 1
[15]
Figure imgf000004_0001
[16]
[17] wherein,
®* pn represents a Seebeck coefficient, I represents an electric current, TH represents a temperature of a metal sheet- type high temperature portion 8, TC represents a temperature of a metal sheet- type low temperature portion 9, K represents a thermal conductivity coefficient, and r represents resistivity.
[18] When a plurality of modules are connected in series as described above, it is possible to maintain the metal sheet-type high temperature portion 8 to a desired temperature or constant temperature range.
[19] However, the above-mentioned conventional cooling system has a problem in that it is impossible to cool a roll while maintaining strong resistance to compressive deformation. Also, the conventional cooling system has problems in that it is impossible to suppress the formation of roll crowns, caused by the thermal expansion, with a rapid response time, and also impossible to control shapes of a material surface to a desired shape.
[20]
Disclosure of Invention Technical Problem
[21] An aspect of the present invention provides a cooling roll of an internal cooling system capable of cooling a roll while maintaining strong resistance to compressive deformation, and a control method thereof.
[22] Another aspect of the present invention provides a cooling roll capable of suppressing formation of roll crowns, caused by the thermal expansion, with a rapid response time, and also easily controlling shapes of a material surface to a desired shape, and a control method thereof.
[23]
Technical Solution
[24] According to an aspect of the present invention, there is provided a cooling roll for controlling roll crown including a heat sink; an internal module comprising multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the heat sink, formed in a longitudinal direction; and an external module comprising multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the internal module, in a longitudinal direction, wherein the internal module transfers electric current, which is transferred from a surface of the external module, to the heat sink.
[25] In this case, the external module may control the respective quantity of electric current flowing in each of multiple layers, respectively.
[26] Also, the external module may include a high temperature portion which is an outer portion of the external module; and a low temperature portion which is a inter portion of the external module and is arranged between the high temperature portion and the internal module, wherein the high temperature portion transfers electric current, which is transferred from a surface of the external module, to the low temperature portion.
[27] In addition, each of the internal module and the external module comprise a plurality of unit rings stacked in the longitudinal direction, each unit ring comprising thermoelectric modules in the form of a ring. [28] Additionally, the heat sink and the internal module are insulated from each other by a insulator, and the internal module and the external module are insulated from each ot her by a insulator.
[29] According to another aspect of the present invention, there is provided a control method of a cooling roll for controlling roll crown. The control method comprises: transferring electric current from a surface of an external module to an internal module comprising multiple layers of the thermoelectric modules, in which the thermoelectric modules are stacked inside of the external module in a longitudinal direction; and transferring electric current from the internal module to a heat sink provided inside of the internal module.
[30] In this case, the respective quantity of the electric current flows in each of the multiple layers, respectively.
[31] Furthermore, the control method may further comprises: transferring electric current from the surface of the external module to a high temperature portion which is an outer portion of the external module; and transferring electric current from the high temperature portion to a low temperature portion arranged between the high temperature portion and the internal module.
[32]
Advantageous Effects
[33] As described above, the cooling roll for controlling roll crown according to one exemplary embodiment of the present invention may be useful to control the roll crown, which is caused by the thermal expansion, with a rapid response time since the roll is cooled with the internal cooling system.
[34] Also, the cooling roll for controlling roll crown according to one exemplary embodiment of the present invention may be useful to control a surface shape of a strip by changing a surface shape of the roll since the thermoelectric modules are arranged so that their temperatures can be independently controlled in a longitudinal direction of the roll.
[35] Furthermore, the p-n elements may be used when large loads are applied to the roll since the p-n elements are made of ceramic and strongly resistant to the compressive loads.
[36]
Brief Description of Drawings
[37] FIG. 1 is a perspective view illustrating a conventional roll.
[38] FIG. 2 is a perspective view illustrating conventional cooling rolls of (a) an internal cooling system and (b) an external cooling system, respectively.
[39] FIG. 3 is a perspective view illustrating a conventional thermoelectric module. [40] FIG. 4 is an exploded perspective view illustrating a cooling roll for controlling roll crown according to one exemplary embodiment of the present invention.
[41] FIG. 5 is an exploded perspective view illustrating (a) a unit ring of an external module in the cooling roll for controlling roll crown; and (b) an assemblage of unit rings stacked in a longitudinal direction according to one exemplary embodiment of the present invention.
[42] FIG. 6 is a perspective view illustrating an assemblage of an external module and an internal module of the cooling roll for controlling roll crown according to one exemplary embodiment of the present invention.
[43]
[44] <Brief description of major parts in drawings>
[45] 10: external module 10a: high temperature portion
[46] 10b: low temperature portion 11: internal module
[47] 12: heat sink
[48]
Best Mode for Carrying out the Invention
[49] Hereinafter, exemplary embodiments of the present invention will be described in detail referring to the accompanying drawings. However, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the invention, so it should be understood that other equivalents and modifications could be made thereto without departing from the scope of the invention. In the accompanying drawings, it is considered that parts having the same configuration and functions have substantially the same reference numerals.
[50]
[51] FIG. 4 is an exploded perspective view illustrating a cooling roll for controlling roll crown according to one exemplary embodiment of the present invention. Referring to FIG. 4, the cooling roll for controlling roll crown is widely composed of a heat sink 12, an internal module 11 and an external module 10.
[52] The internal module 11 includes multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the heat sink 12 in a longitudinal direction. The external module 10 includes multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the internal module 11 in a longitudinal direction. Also, the heat sink 12 and the internal module 11 are insulated from each other by a insulator, and the internal module 11 and the external module 10 are insulated from each other by a insulator.
[53] The internal module 11 transfers electric current, which is transferred from a surface of the external module 10, to the heat sink 12. Here, the external module 10 functions to control the respective quantity of electric current flowing in each of the multiple layers, respectively.
[54] A control method of the cooling roll for controlling roll crown, as described above, is described in more detail.
[55] Electric current is transferred from a surface of the external module 10 to the internal module 11 including multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked inside of the external module 10 in a longitudinal direction. Referring to this operation, electric current is transferred from the surface of the external module 10 to the high temperature portion 10a which is an outer portion of the external module 10, and electric current is then transferred from the high temperature portion 10a to the low temperature portion 10b arranged between the high temperature portion 10a and the internal module 11.
[56] Then, electric current is transferred from the internal module 11 to the heat sink 12 provided inside of the internal module 11. Here, the respective quantity of the electric current flowing in each of the multiple layers of the thermoelectric modules of the external module 10, is controlled.
[57]
[58] FIG. 5 is an exploded perspective view illustrating (a) a unit ring of an external module in the cooling roll for controlling roll crown; and (b) an assemblage of unit rings stacked in a longitudinal direction according to one exemplary embodiment of the present invention.
[59] FIG. 5 (a) shows an external module 10 that is formed in a double stack manner. The external module 10 includes a high temperature portion 10a and a low temperature portion 10b. The high temperature portion 10a is an outer portion of the external module 10, and the low temperature portion 10b is a inter portion of the external module 10. That is, the high temperature portion 10a of the external module 10 faces a surface of the cooling roll, and the low temperature portion 10b of the external module 10 is arranged between the high temperature portion 10a and the internal module 11. One ring of the external module 10 is referred to as a unit ring that controls the respective quantity of electric current.
[60] Referring to FIG. 5 (b), the external module 10 has a structure in which an outer high temperature portion 10a and a inter low temperature portion 10b are coupled to each other to form a unit ring, and the unit rings are stacked in a longitudinal direction. Since the unit rings of the external module 10 are formed as dependent units in a longitudinal direction as described above, the respective quantity of electric current flowing in each unit ring may be controlled independently. Therefore, the unit rings having different temperatures may be distributed along a longitudinal direction of the cooling roll. [61]
[62] FIG. 6 is a perspective view illustrating an assemblage of an external module and an internal module of the cooling roll for controlling roll crown according to one exemplary embodiment of the present invention. Referring to FIG. 6, the internal module 11 includes thermoelectric modules stacked in a longitudinal direction, and coupled to the low temperature portion 10b of the external module 10 and the heat sink 12. Both the external module 10 and the internal module 11 include thermoelectric modules that are stacked in the formed of a ring.
[63] The internal module 11 transfers heat, which is transferred from the surface of the cooling roll to the inside of the cooling roll by the external module 10, back to the heat sink 12. Here, the heat sink 12 is installed in one or both sides of the cooling roll.
[64] The exemplary embodiments of the present invention have been described in detail with reference to the accompanying drawings. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the scope of the invention will become apparent to those skilled in the art from this detailed description.
[65]

Claims

Claims
[1] A cooling roll for crown control of roll, comprising: a heat sink; an internal module comprising multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the heat sink in a longitudinal direction; and an external module comprising multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked outside of the internal module in a longitudinal direction, wherein the internal module transfers electric current, which is transferred from a surface of the external module, to the heat sink.
[2] The cooling roll of claim 1, wherein the external module controls the respective quantity of electric current flowing in each of multiple layers, respectively.
[3] The cooling roll of claim 1, wherein the external module comprises: a high temperature portion which is an outer portion of the external module; and a low temperature portion which is a inner portion of the external module and is arranged between the high temperature portion and the internal module, wherein the high temperature portion transfers electric current, which is transferred from a surface of the external module, to the low temperature portion.
[4] The cooling roll of claim 1, wherein each of the internal module and the external module comprise a plurality of unit rings stacked in the longitudinal direction, each unit ring comprising thermoelectric modules in the form of a ring.
[5] The cooling roll of claim 1, wherein the heat sink and the internal module are insulated from each other by a insulator, and the internal module and the external module are insulated from each other by a insulator.
[6] A control method of a cooling roll for crown control of roll, the control method comprising: transferring electric current from a surface of an external module to an internal module comprising multiple layers of thermoelectric modules, in which the thermoelectric modules are stacked inside of the external module in a longitudinal direction; and transferring electric current from the internal module to a heat sink provided inside of the internal module.
[7] The control method of claim 6, wherein the external module controls the respective quantity of electric current flowing in each of the multiple layers, respectively.
[8] The control method of claim 6, further comprising: transferring electric current from the surface of the external module to a high temperature portion which is an outer portion of the external module; and transferring electric current from the high temperature portion to a low temperature portion arranged between the high temperature portion and the internal module.
PCT/KR2008/007259 2007-12-27 2008-12-09 Cooling roll for crown control of roll and control method thereof WO2009093806A2 (en)

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CN2008801227354A CN101909773B (en) 2007-12-27 2008-12-09 Cooling roll for crown control of roll and control method thereof
JP2010540560A JP5378407B2 (en) 2007-12-27 2008-12-09 COOLING ROLL FOR ROLL CROWN CONTROL AND ITS CONTROL METHOD

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KR1020070139363A KR101536355B1 (en) 2007-12-27 2007-12-27 Cooling roll for the crown control of roll
KR10-2007-0139363 2007-12-27

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WO2009093806A3 WO2009093806A3 (en) 2009-09-17

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CN101909773B (en) 2012-11-21
JP2011507706A (en) 2011-03-10

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