WO2002029267A1 - Method and device for dividing local thermal loads equally - Google Patents

Method and device for dividing local thermal loads equally Download PDF

Info

Publication number
WO2002029267A1
WO2002029267A1 PCT/FI2001/000818 FI0100818W WO0229267A1 WO 2002029267 A1 WO2002029267 A1 WO 2002029267A1 FI 0100818 W FI0100818 W FI 0100818W WO 0229267 A1 WO0229267 A1 WO 0229267A1
Authority
WO
WIPO (PCT)
Prior art keywords
roll
mixing means
fixed support
thermal loads
rotating
Prior art date
Application number
PCT/FI2001/000818
Other languages
French (fr)
Inventor
Eero Suomi
Original Assignee
Metso Paper Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metso Paper Inc. filed Critical Metso Paper Inc.
Priority to AT0921901A priority Critical patent/AT413112B/en
Priority to DE10196683T priority patent/DE10196683T1/en
Priority to AU2001289971A priority patent/AU2001289971A1/en
Publication of WO2002029267A1 publication Critical patent/WO2002029267A1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/022—Heating the cylinders
    • D21F5/027—Heating the cylinders using a heat-transfer fluid between the heating means and the cylinder shell
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/02—Rolls; Their bearings
    • D21G1/0253—Heating or cooling the rolls; Regulating the temperature
    • D21G1/0266—Heating or cooling the rolls; Regulating the temperature using a heat-transfer fluid

Definitions

  • the invention relates to a method and device for dividing local thermal loads equally in a rotating, liquid-containing roll of a paper/board or finishing/converting machine.
  • the aim in dividing the heat equally is to eliminate an increase in the diameter of the middle part of the roll, which is due to an uneven thermal load and occurs particularly in polymer rolls.
  • the said increase in diameter results in a decrease in edge load. This in turn creates a so-called weeping gloss profile in the paper.
  • the aim of the invention is to provide a simple, efficient, reliable and economical method and device for dividing thermal loads equally.
  • the device comprises a fixed support extending from at least one end of the roll inside the roll, coaxially with the axis of rotation of the roll, from which support is arranged to protrude one or more mixing means.
  • the flow of the liquid inside the rotating roll which thus rotates with the roll, is controlled by means of one or more mixing means, which are stationary inside the roll.
  • the mixing effect of the liquid is created by the interaction between the stationary mixing means and the liquid rotating with the rotating roll.
  • the mixing effect in turn divides local thermal loads equally.
  • the surface area and the angle of incidence of the mixing means are factors affecting internal flow and the effect of heat transfer.
  • the set power adjustments of the mixing means may be changeable during operation or they may be set fixed.
  • the rotating (arrow 6) liquid-filled roll of the paper/board or finishing/converting machine is marked generally with reference numeral 1.
  • the roll 1 comprises a mantle surface 4 and end flanges 5.
  • the end flanges 5 are provided with bearings (not shown) known as such, on which the roll 1 rotates.
  • the device for dividing thermal loads equally comprises a fixed support 2 extending from at least one end of the roll 1 inside the roll 1 , coaxially with the axis of rotation of the roll 1 , from which support is arranged to protrude one or more mixing means 3.
  • the fixed support 2 may be arranged to extend over the entire length of the roll 1, as in the example shown in the drawing, or the fixed support 2 may be shorter and extend only over a part of the length of the roll 1 , starting from one or both of the flanges 5.
  • the mixing means 3 can be arranged in a fixed position with respect to the fixed support 2.
  • the position, and also the location, of the mixing means 3 can be arranged to be adjustable with respect to the fixed support 2, especially also in such a way that the mixing means 3 is equipped with adjustment means (not shown) which make possible adjustment of the mixing means during the rotation of the roll 1.
  • the mixing effect is created by the interaction between the stationary mixing means 3 and the liquid rotating with the rotating roll 1.
  • the surface area, shape and angle of incidence of the mixing means 3 are factors affecting internal flow and the effect of heat transfer.
  • mixing means 3 can be used, for example, an adjustable-blade propeller, the angle of which can be adjusted to obtain the desired mixing power and shape of flow pattern.
  • the mixing means 3 Due to the mixing means 3, the formation of temperature differences inside the roll 1 is prevented.
  • the roll 1 may be arranged external circulation shown by the arrows 7, the purpose of which is to discharge excessive heat generated during the operation of the roll 1 from the heat-dividing liquid.

Landscapes

  • Paper (AREA)

Abstract

The invention relates to a method and device for dividing local thermal loads equally in a rotating, liquid-containing roll (1) of a paper/board or finishing/converting machine. The device relating to the invention is characterised in that the device comprises a fixed support (2) extending from at least one end of the roll (1) inside the roll (1), coaxially with the axis of rotation of the roll (1), from which support is arranged to protrude one or more mixing means (3).

Description

Method and device for dividing local thermal loads equally
The invention relates to a method and device for dividing local thermal loads equally in a rotating, liquid-containing roll of a paper/board or finishing/converting machine.
In the prior art is known a solution in which water is used inside a rotating roll for dividing local thermal loads equally. The water is circulated by means of a separate external pump, or the water is enclosed inside the roll without circulation.
The aim in dividing the heat equally is to eliminate an increase in the diameter of the middle part of the roll, which is due to an uneven thermal load and occurs particularly in polymer rolls. The said increase in diameter results in a decrease in edge load. This in turn creates a so-called weeping gloss profile in the paper.
Known solutions concerning the equal dividing of heat have not been entirely satisfactory in all cases.
The aim of the invention is to provide a simple, efficient, reliable and economical method and device for dividing thermal loads equally.
This aim has been achieved by means of the device and method disclosed in the claims.
It is characteristic of the device relating to the invention that the device comprises a fixed support extending from at least one end of the roll inside the roll, coaxially with the axis of rotation of the roll, from which support is arranged to protrude one or more mixing means.
It is characteristic of the method relating to the invention that the flow of the liquid inside the rotating roll, which thus rotates with the roll, is controlled by means of one or more mixing means, which are stationary inside the roll. The mixing effect of the liquid is created by the interaction between the stationary mixing means and the liquid rotating with the rotating roll. The mixing effect in turn divides local thermal loads equally. The surface area and the angle of incidence of the mixing means are factors affecting internal flow and the effect of heat transfer. The set power adjustments of the mixing means may be changeable during operation or they may be set fixed.
Further preferable developments of the invention are disclosed in the dependent claims.
The invention is described in greater detail in the following, with reference to the accompanying drawing, which shows diagrammatically a liquid-filled rotating roll provided with the device relating to the invention for dividing thermal loads equally.
In the drawing, the rotating (arrow 6) liquid-filled roll of the paper/board or finishing/converting machine is marked generally with reference numeral 1. The roll 1 comprises a mantle surface 4 and end flanges 5. To fit the roll 1 with bearings, the end flanges 5 are provided with bearings (not shown) known as such, on which the roll 1 rotates.
The device for dividing thermal loads equally comprises a fixed support 2 extending from at least one end of the roll 1 inside the roll 1 , coaxially with the axis of rotation of the roll 1 , from which support is arranged to protrude one or more mixing means 3.
The fixed support 2 may be arranged to extend over the entire length of the roll 1, as in the example shown in the drawing, or the fixed support 2 may be shorter and extend only over a part of the length of the roll 1 , starting from one or both of the flanges 5.
The mixing means 3 can be arranged in a fixed position with respect to the fixed support 2. Alternatively, the position, and also the location, of the mixing means 3 can be arranged to be adjustable with respect to the fixed support 2, especially also in such a way that the mixing means 3 is equipped with adjustment means (not shown) which make possible adjustment of the mixing means during the rotation of the roll 1.
The mixing effect is created by the interaction between the stationary mixing means 3 and the liquid rotating with the rotating roll 1. The surface area, shape and angle of incidence of the mixing means 3 are factors affecting internal flow and the effect of heat transfer. As mixing means 3 can be used, for example, an adjustable-blade propeller, the angle of which can be adjusted to obtain the desired mixing power and shape of flow pattern.
Due to the mixing means 3, the formation of temperature differences inside the roll 1 is prevented. In the roll 1 may be arranged external circulation shown by the arrows 7, the purpose of which is to discharge excessive heat generated during the operation of the roll 1 from the heat-dividing liquid.

Claims

Claims
1. A device for dividing local thermal loads equally in a rotating, liquidcontaining roll (1) of a paper/board or finishing/converting machine, characterised in that the device comprises a fixed support (2) extending from at least one end of the roll (1) inside the roll (1), coaxially with the axis of rotation of the roll (1), from which support is arranged to protrude one or more mixing means (3).
2. A device as claimed in claim 1 , characterised in that the fixed support (2) is arranged to extend over the entire length of the roll (1 ).
3. A device as claimed in claim 1 , characterised in that the mixing means (3) is arranged in a fixed position with respect to the fixed support (2).
4. A device as claimed in claim 1 , characterised in that the position of the mixing means (3) is arranged to be adjustable with respect to the fixed support (2).
5. A device as claimed in claim 1 , characterised in that the location of the mixing means (3) is arranged to be adjustable with respect to the fixed support (2).
6. A device as claimed in claim 1 , characterised in that the mixing means (3) is equipped with adjustment means which make possible adjustment of the mixing means during rotation of the roll (1).
7. A method for dividing local thermal loads equally in a rotating, liquid- containing roll (1 ) of a paper/board or finishing/converting machine, characterised in that the flow of the liquid inside the rotating roll (1), which thus rotates with the roll, is controlled by means of one or more mixing means (3), which are stationary inside the roll (1).
PCT/FI2001/000818 2000-10-05 2001-09-20 Method and device for dividing local thermal loads equally WO2002029267A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT0921901A AT413112B (en) 2000-10-05 2001-09-20 DEVICE FOR THE EQUAL DISTRIBUTION OF LOCAL THERMAL LOADS
DE10196683T DE10196683T1 (en) 2000-10-05 2001-09-20 Method and device for the uniform distribution of local thermal loads
AU2001289971A AU2001289971A1 (en) 2000-10-05 2001-09-20 Method and device for dividing local thermal loads equally

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20002194A FI108252B (en) 2000-10-05 2000-10-05 Method and device for equalising local heat stresses
FI20002194 2000-10-05

Publications (1)

Publication Number Publication Date
WO2002029267A1 true WO2002029267A1 (en) 2002-04-11

Family

ID=8559233

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2001/000818 WO2002029267A1 (en) 2000-10-05 2001-09-20 Method and device for dividing local thermal loads equally

Country Status (5)

Country Link
AT (1) AT413112B (en)
AU (1) AU2001289971A1 (en)
DE (1) DE10196683T1 (en)
FI (1) FI108252B (en)
WO (1) WO2002029267A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1389693A2 (en) 2002-08-16 2004-02-18 Voith Paper Patent GmbH Heated roller and operating process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2879846B1 (en) 2012-08-01 2017-04-05 Marbach Werkzeugbau GmbH Roller device for processing sheet material with mixing device for mixing a tempering fluid

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812149A1 (en) * 1998-03-20 1999-09-23 Heidelberger Druckmasch Ag Chill roll

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8414320U1 (en) * 1984-05-10 1985-09-19 Pagendarm, Erich, 2000 Hamburg Cooling or heating roller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19812149A1 (en) * 1998-03-20 1999-09-23 Heidelberger Druckmasch Ag Chill roll

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1389693A2 (en) 2002-08-16 2004-02-18 Voith Paper Patent GmbH Heated roller and operating process
DE10237632A1 (en) * 2002-08-16 2004-03-04 Voith Paper Patent Gmbh Temperable roller and process for its operation
DE10237632B4 (en) * 2002-08-16 2004-11-11 Voith Paper Patent Gmbh Temperable roller and process for its operation

Also Published As

Publication number Publication date
DE10196683T1 (en) 2003-08-28
FI108252B (en) 2001-12-14
AU2001289971A1 (en) 2002-04-15
FI20002194A0 (en) 2000-10-05
ATA92192001A (en) 2005-04-15
AT413112B (en) 2005-11-15

Similar Documents

Publication Publication Date Title
FI80334C (en) Drum unit with bend adjustable and temperable drum
US4233011A (en) Rolls of controllable flexure, especially for machines for the production and processing of webs of paper or plastic
EP1801533A2 (en) Heating fluid medium passing roller device
US6220161B1 (en) Chill roller which provides uniform temperature regulation
RU2004111668A (en) HORIZONTAL ROLLER MILL
JPH07214756A (en) Printing web heating device of press
JP3589697B2 (en) Web cooling device
JP5089357B2 (en) How to dry a sheet printed or coated on a printing press
JPH0369307B2 (en)
US5571066A (en) Heatable roll for calendering or smoothing systems
WO2002029267A1 (en) Method and device for dividing local thermal loads equally
EP0471655B1 (en) Heatable roll
FI96889B (en) Method for using a roll
JPH07117316B2 (en) Cylinder or roller that is heated or cooled using an electronic cooling / heating element and its heating / cooling system
WO2008059102A1 (en) End part of an air dryer, air dryer, method in the end part of an air dryer and use of fan
US3266561A (en) Method and means for correcting the crown of a roll
US5467535A (en) Moisture equalizer for a continuous flow grain dryer
JP4399374B2 (en) Asphalt mixture production equipment dryer
US6076462A (en) Method for inking a cylinder with viscous ink using doctor blades
JPH074927B2 (en) Ink fountain for printing machines
JP4778596B2 (en) Roll to control flatness
US5775211A (en) Roller driving process and apparatus
JP2005016716A (en) Roll and its balancing method
ES2427353T3 (en) Method and apparatus for drying a band of moving material in a paper or cardboard manufacturing machine
WO2003081061A1 (en) A heated roll of a paper/board machine or finishing machine and a method for heating the same

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ CZ DE DE DK DK DM DZ EC EE EE ES FI FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PH PL PT RO RU SD SE SG SI SK SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: A9219/2001

Country of ref document: AT

RET De translation (de og part 6b)

Ref document number: 10196683

Country of ref document: DE

Date of ref document: 20030828

Kind code of ref document: P

WWE Wipo information: entry into national phase

Ref document number: 10196683

Country of ref document: DE

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8607