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Thermo roll for a fiber web machine

A fiber web machine, roll body technology, used in calenders, paper machines, textiles and paper, etc.

Active Publication Date: 2021-12-24
VALMET TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes small journals possible

Method used

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  • Thermo roll for a fiber web machine
  • Thermo roll for a fiber web machine
  • Thermo roll for a fiber web machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] figure 1 A part of a fiber web machine is shown in side view. Here is a calender 10 with a stack of rolls 11 . At least some of these rolls are thermo rolls 12 . In a calender, the thermo rolls are heated by a heat transfer medium, which is hot water or oil or other thermal fluids. By heating, the properties of fibrous webs, such as paper, can be improved. Also, the guide roll may be a thermo roll. Typically, heated rolls are in contact with other rolls or heated rolls in the nip. The thermo roll according to the invention can also be used in other places where it is required, for example in the dryer section of a fiber web machine.

[0030] Figure 2a A cross-section of a thermo roll 12 according to the invention is shown. The thermo roll 12 is intended for a fiber web machine. The thermo roll 12 comprises a hollow roll body 13 having a plurality of grooves 14 on its outer surface 15 . Groove 14 in Figure 4 shown in detail. The grooves can run in the axial ...

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PUM

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Abstract

The invention relates to a thermo roll. The thermo roll (12) includes a hollow roll body (13) having a plurality of grooves (14) on its outer surface (15). Each groove (14) extends from one end of the roll body (13) to another. In the roll body (13) there are axial bores (16) opening to the grooves (14). The thermo roll (12) also includes an axle stub (17), having conducts (18) extending to said axial bores (16), fixed to both end of the roll body (13) by a plurality of bolts (19). In addition, the thermo roll (12) also includes an outer jacket (21) friction fitted on the roll body (13) and the axle stubs (17) closing the grooves (14) as a plurality of channels (22) for heat transfer medium. Each axial bore (16) has an offset (23) opening to two adjacent grooves (14).

Description

technical field [0001] The invention relates to a thermo roll for a fiber web machine comprising: [0002] - a hollow roll body having a plurality of grooves on its outer surface, each groove extending from one end of the roll body to the other, and axially drilled holes in the roll body leading to the grooves; [0003] - a journal having a conduct extending into the axial bore and secured to both ends of the roll body by a plurality of bolts; and [0004] - An outer sheath which is friction fitting on the roll body and the journal and which closes the grooves as channels for the heat transfer medium. Background technique [0005] Finnish Patent No. 122707 discloses a thermo roll of a fiber web machine. The thermo roll has a roll body with two journals. The journals are bolted to the roll body. In addition, the roller body has grooves and an outer jacket. Channels for the heat transfer medium are thereby formed. The journals and roll bodies have bores for leading the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21G1/00D21G1/02
CPCD21G1/00D21G1/02D21G1/0266D21G1/0226D21F5/021
Inventor J·詹霍宁
Owner VALMET TECH OY
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