FI122707B - Roll for a fiber web machine - Google Patents

Description

FIBER MACHINE ROLL VALS FÖR EN FIBERBANAMASKIN

TECHNICAL FIELD

The present invention relates to a roll used in fiber web machines, preferably paper, board and pulp machines, for processing web-like material. In particular, the invention relates to, but not limited to, a roll for use in fiber web machines for heating, calendering, wet pressing and / or cooling web material.

BACKGROUND OF THE INVENTION

15 The thermal power required for calendering paper and board is currently produced by heated rolls, thermal rollers. Calender speeds have risen sharply in recent years. In order to achieve the required calendering effect, the surface temperatures of the thermal rolls also need to be raised to 200 ° C to 250 ° C or even higher. The high 20 running speed combined with the high surface temperature of the thermal roller means that the thermal output to be carried out by the thermal roller must be very high, typically 200 kW / m or more in new processes.

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It is known that the heat of a thermal roll is produced by passing a liquid or gas acting as a heat transfer medium to the flow channels inside the thermal roll and, in particular, to the bores in the shell from which heat is transferred to the shell and | is still due to the roll surface.

EP 1159484 B1 discloses a heated calender roll 30 with end portions of peripheral bores in the jacket provided with insulating sleeves. The insulating sleeves are adjusted by twisting and / or 2 axially displacing. The insulating sleeves are enclosed in a flow passage between the jacket and the roll end pieces in connection with the roll assembly.

SUMMARY OF THE INVENTION

According to the invention there is provided a roller for heating and / or cooling the fiber web machine according to claim 1.

In some embodiments, the roll comprises at its first end 10 at a distance from the first circumferential flow chamber a second circumferential flow chamber which is in fluid communication with the heat transfer medium inlet or outlet channel arranged in the opposite flow direction of the roll. a heat transfer fluid flow connection between the second circumferential flow chamber and the flow channel of the jacket portion provided in the opposite flow direction.

The roll comprises a heat transfer area in the diaper portion where it is desired to transfer heat from the diaper portion 20 to the fiber web to be treated or from which area the fiber web is to transfer heat through the diaper portion. The first and second circumferential flow chambers are arranged in cm, preferably to the side of the heat transfer region of the diaper portion.

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Preferably, the first flow sleeves are arranged to at least partially pass through the first cm circumferential flow chamber. Preferably the first flow sleeves are arranged to be at least partially permeable to the second circumferential flow chamber g. Preferably, the second flow sleeves are arranged to be at least partially permeable to the second circumferential flow chamber. Preferably, the second flow sleeves are arranged at least partially permeable to the first circumferential flow chamber. Preferably, the first and second flow sleeves 3 are arranged to be at least partially permeable to both the first and second circumferential flow chambers.

Preferably, the direct flow connection between the first and second circumferential flow chambers 5 is blocked. Preferably, the direct flow connection between the first and second circumferential flow chambers is prevented by providing a seal between the material between the first and second circumferential flow chambers and the flow sleeve.

Preferably, the flow sleeve comprises at least one tubular member.

Preferably, the flow sleeve comprises between the first end and the second end and the first and second ends at least one first flow opening and a second flow opening at the other end. The first flow opening may provide a heat transfer fluid flow connection 15 between the flow chamber and the inner flow space of the flow sleeve and the second flow opening may provide a flow connection between the inner flow space of the flow sleeve and the flow channel of the jacket portion.

The flow sleeve may have a plurality of first flow openings such that the heat transfer fluid flow connection between the flow chamber and the internal flow space of the flow sleeve 20 is accomplished through at least one first flow opening. The flow sleeve may have a plurality of other flow openings The flow sleeve may comprise a rigid material or the flow sleeve or portion thereof may be made of a flexible or flexible material. The flow sleeve c3 may be adjustable rotationally or axially.

Preferably, the flow connection formed by the flow sleeve is circumferential | between the flow chamber and the flow channel of the jacket portion is substantially g linear. The linear flow connection is preferably realized by a roll

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g parallel to the axis, but it can also be implemented at an angle of 30 relative to the axis of the roll. A plurality of mounting holes for receiving the flow bushings can be provided in the roll end piece and sheath portion corresponding to the flow passages of the sheath portion. The mounting holes may be parallel to the roll axis or at an oblique angle to the roll axis.

5 To cover the mounting hole in a heat transfer retaining and sealing manner, the roll may comprise a cover, which may be a portion or a separate portion of the flow sleeve. The locking of the flow sleeve in its operating position may be effected by a different part or by the same part which provides for the possible adjustment of the flow sleeve in the rotational or axial direction. The flow sleeve adjustment 10 in the rotational direction may be effected by moving the same or different portions as the flow sleeve adjustment in the axial direction.

According to some embodiments, the flow sleeve comprises an insulating member. Preferably, the insulating member is provided at one end of the flow sleeve comprising a second flow opening. Preferably, the open end of the insulating sleeve comprises a second flow opening for the flow sleeve. Preferably, the dielectric portion is sleeve-like and allows the end region of the jacket portion to be isolated from the thermal effect of the heat transfer medium. The dielectric portion may extend in the end region to a path beyond which the fibrous web to be treated with the jacket surface does not extend. The insulating part may comprise a cross-section in its end region inside the roll which is in the form of a partial circle. The insulating part may comprise a bevelled tube c i in its lateral end region when viewed from the side.

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i 0 25 The flow sleeve can be detached from the roll and attached to the roll without removing the end piece cv from the sheath.

1 CC Q_ ^ The axial position oo of the flow sleeve or flow sleeve portion in the roll can be adjusted, preferably without removing the roll end piece from the jacket section and / or the rotational position of the flow sleeve or flow sleeve portion in the roll can be adjusted, preferably without removing the roll end piece.

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The rotational position of the insulating member in the roll and / or the axial position in the roll can be adjusted, preferably without removing the roll end piece from the jacket member.

The amount of heat transfer medium 5 through the flow sleeve can be adjusted per flow channel. The amount of flow can be adjusted by changing the axial position of the flow sleeve or portion of the flow sleeve in the roll. The flow rate can be adjusted by changing the rotational position of the flow sleeve or portion of the flow sleeve in the roll. The flow sleeve or part thereof can be displaced axially so that the area of the first flow opening defined by the wall of the circumferential flow chamber 10 is adjustable.

Adjustment of the flow channel allows the control of the roll curvature. The curvature may be due, for example, to an uneven distribution of the heat-expandable material 15 or an uneven distribution of the heat transfer effect of the heat transfer duct in the region of the roll shell. By reducing the flow of heat transfer medium in the at least one flow channel in the direction outside the roll curvature radius, the thermal expansion of the roll 20 caused by this direction can be reduced and thus curvature reduced. Similarly, if necessary, the flow in at least one flow channel in the inner direction of the curvature radius may be increased.

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The flow sleeve may comprise at least two parts movable relative to one another and preferably movable relative to one another by rotation and / or axially. The flow sleeve may comprise nested parts. Flow sleeve may comprise a telescopic structure. The flow sleeve may comprise two

That is, a nested movable flow section, for example, 00 C \ g pipes each comprising a flow opening. By moving the flow sections relative to each other at 30, the amount of flow allowed by the flow openings can be adjusted or the flow connection can be disconnected. Preferably, the insulating member 6 is movable axially and / or rotationally relative to the flow members.

The first end of the flow sleeve may serve as the gripping end 5 of the flow sleeve for detaching, securing or moving the flow sleeve or part of the flow sleeve. The first end of the flow sleeve may comprise a locking member such as a thread and / or a sealing member such as a seal for respectively locking and / or sealing the flow sleeve relative to the roll end. The first end of the flow sleeve may comprise a flow section for moving the flow section of the gripping head 10, for example by hand or by means of a tool. The first end of the flow sleeve may comprise a gripping head for moving the insulating part.

The at least one flow portion or dielectric portion of the roll may be arranged to be adjusted at 15 corresponding gripping ends outside the roll without disassembling the roll. The at least one flow sleeve or flow portion or insulating portion of the roll may be arranged to be adjustable without removing the roll end piece or without removing the flow sleeve. The at least one flow sleeve or flow portion or insulating portion of the roll may be arranged to be adjustable by removing the mounting hole cover from the end piece of the roll 20.

The circumferential flow chamber may be arranged on the end piece.

The circumferential flow chamber may be formed axially o <m to the inside face of the block. Circular flow chamber i

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25 may be formed axially on the outer surface of the flange portion cv of the end piece.

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g The circumferential flow chamber may be provided in the end region of the diaper portion.

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g The circumferential flow chamber may be formed in the axial direction at the end of the mantle portion at 0 °.

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The roll may comprise more than one circumferential flow chamber per flow direction at one end of the roll.

The circumferential flow chamber may be formed of a circumferential groove 5 which is closed. The circumferential flow chamber may be formed radially into a groove and then closed by securing the circumferential lid. The circumferential flow chamber may be formed axially into a groove. The annular flow chamber may be closed by attaching an annular lid. The lid may be secured by welding. The lid may comprise a plate-like portion or portions.

The heat transfer fluid flow connection between the circumferential flow channel and the respective inlet or outlet channel at the roll end may be provided with flow distribution channels, the number of which may be significantly less than the number of flow channels.

According to the invention, a flow sleeve is provided for use in a roll for heating and / or cooling of a fiber web machine.

20 The sheath portion of the roll may consist of an outer layer secured to the inner shaft. The roll shell portion may comprise one or more layers of material.

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™ The roll flow channels may be pre-formed flow grooves formed in the inner axis and outer layer o 25

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<n the outer surface and / or the inner surface of the outer layer. Roller flow channels may be peripheral bores formed in the mantle portion.

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According to some embodiments, the flow channels are disposed at various locations within the roll at a desired density. The flow channels may be located at a distance 8 relative to adjacent flow channels at the interface between the inner axis of the roll and the outer layer.

The flow channels of the heat transfer medium of the roll may be positioned at a minimum distance 5 from the surface of the roll permitted by the manufacturing and use requirements, thereby limiting the heat transfer resistance caused by the roll mantle. The flow channels can be located below the roll surface at desired distances from each other, even many times denser than in the prior art. Flow channels with a smaller cross-sectional area and a smaller spacing than the drilled peripheral holes can be provided in connection with the roll surface. The flow duct system can easily implement a variety of circulations: duopass, tripass, multipass. You can change the order of the roll flow channels without disassembling the roll or removing the roll end piece.

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By more freely influencing the size and placement of the flow passages near the roll surface, the roll can provide a more uniform heat transfer effect.

20 Due to the uniform heat transfer, the surface of the roll can be significantly heated throughout to the desired temperature, thus avoiding a reduction in the thermal power caused by the cooler surface portions.

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Various embodiments of the present invention will be described or described only in connection with one or more aspects of the invention. One skilled in the art will appreciate that any aspect of the invention the embodiment may be applied to the same aspect of the invention and g to other aspects alone or in combination with other embodiments.

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The invention will now be described with reference to the accompanying schematic drawings, without, however, limiting the invention to those shown in the drawings.

5 BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 shows a roll according to one embodiment of the invention, viewed from the side of the roll shaft and partially cut away.

Figure 2 shows the end of the roll of Figure 1 and partially sectioned in section A-A and B-B of Figure 1.

Figure 3 shows details of the roll end of Figure 1 and the flow arrangement formed by the first flow sleeve.

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Figure 4 shows details of the roll end of Figure 1 and a flow arrangement formed by a second flow sleeve.

Figure 5 shows details of the end region of the roll of Figure 1 without the flow sleeve 20.

Figures 6 and 7 show some flow channel arrangements of the diaper section viewed from the direction of the end of the diaper section, δ

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25 DESCRIPTION OF THE PREFERRED EMBODIMENTS

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| In the following description, like reference numerals refer to like parts. It is to be noted that the figures shown are not in their entirety on a scale, and that they serve primarily the purpose of illustrating embodiments of the invention.

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Figure 1 is a side sectional view of a roll 1 for heating and / or cooling. Fig. 2 shows the end of the roll of Fig. 1 and partly in section A-A and B-B of Fig. 1. The roller 1 comprises a sheath portion 2,4. The mantle portion comprises an outer layer 4 attached to the outer surface 2a of the inner shaft 2 and inner shaft 5, the outer surface of which is marked 4a. At the interface between the outer layer 4 and the inner shaft 2, there are flow grooves for forming flow channels 5 for the heat transfer medium. The inner surface of the inner shaft 2 is indicated in the figures by a line 6.

The roller 1 comprises end pieces 3, 3 'attached to the ends of the sheath portion 2,4. In Figure 1, the roll 1 comprises a first end piece 3 and a second end piece 3 'attached to the ends of the inner shaft 2. A first end piece 3 is provided at the first end of the roll 1. The first end piece 3 comprises a first flange portion 3a which is fixed to the first end of the inner shaft 2 by means of screws 9 shown by dotted lines. A second end piece 3 'is provided at one end of the roll. The second end piece 3 'comprises a second flange part 3b attached to one end of the inner shaft 2. The end piece can also be secured by means other than screw mounting and the form-fitting 20 shown in the figure.

The first end piece 3 comprises a feed conduit 7a and a discharge conduit 8a for the heat transfer medium cvj, through which the heat transfer agent c1 is respectively introduced into and out of the roll 1.

The roller 1 comprises a preferably metallic | secured around the inner shaft 2 for example, a steel outer layer 4 comprising an outer surface 4a for treating the fibrous web W. The heat is transferred during roller 1 operation

S from heat transfer medium to fiber web W or fiber web W

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o 30 to heat transfer medium.

Preferably, the heat transfer medium is an oil used at hot temperatures. The heat transfer medium may also be water or vapor or the like liquid or gaseous medium used for heat transfer.

5, the roll 1 comprises a first circumferential flow chamber 7 which is in fluid communication with the heat transfer medium supply passage 7a at the shaft shaft pin, and the roll 1 comprises first flow sleeves 11 arranged in mounting holes 10 adjacent to the first circumferential flow chamber 7 a heat transfer fluid flow connection F1 between the first circumferential flow chamber 7 and the flow flow channel 5 of the diaper portion 2.4 (Figures 1 and 3).

In the first end piece 3, the roll 1 comprises a second circumferential flow chamber 8 at a distance 15 from the first circumferential flow chamber 7, which is in fluid communication with the heat transfer fluid outlet 8a at the shaft shaft pin, and the second flow sleeve 1T arranged with the second circumferential flow chamber a heat transfer medium return flow connection F2 may be formed between the second circumferential flow chamber 8 and the return portion 5 'of the jacket portion (Figure 4).

The roller 1 comprises a heat transfer region 2.4 with a sheath portion substantially wide of the fiber web W shown in the dashed line, in which area from the sheath portion o 25 to heat W or the region 8I through the sheath portion is desired to transfer heat | heat transfer medium. The first 7 and the second circumferential flow chamber 8 are preferably arranged on the side of the heat transfer region of the diaper portion. Outside the heat transfer area of the jacket portion, it may be desirable to limit heat transfer o 30, for which e.g. 3 and 4, an insulating part 15 comprising the flow sleeves 11,11 'is described.

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In Figure 1, the flow channels formed by the flow channels 5 are formed by flow channels extending from the end of the inner shaft 2. The flow channels of the roll 1 need not necessarily be parallel to the axis of the roll 5, but may also be arranged, for example, obliquely or in the form of a spiral, e.g. to avoid barring.

The heat transfer medium flow channel may also comprise a flow groove on the inner surface of the outer layer 4 at a point 10 corresponding to the flow groove 5; or the corresponding point of the flow groove on the inner surface of the outer layer and the outer surface of the inner shaft 2; or flow grooves on the surfaces of the inner shaft and the outer layer that are aligned with or relative to one another in the circumferential direction of the roll, but form a flow channel.

The flow channels 5 of the heat transfer medium of the roll 1 may be located close to the surface of the roll 1, whereby the heat insulating effect of the material of the intermediate outer layer 4 is negligible on the thermal power and surface temperature obtained from the roll 1. The design of the roller 1 allows the flow channels 5 to be easily formed with a desired cross-sectional flow, for example in size, location, and shape, if desired. For example, the shape of the flow passage can be made by selecting the shape of the working blade in a suitable manner. The variable cm flow cross-section of the flow channel can be achieved by machining the flow groove to a variable depth, eliminating the need for displacement bodies to change the flow rate o 25. The flow channels 5 can be easily positioned below the roll surface, for example at short distances from one another. Near roll surface a plurality of flow passages 5 may be provided, the flow cross-section g of which is preferably smaller than economically possible by the S technology for producing drilled holes. The flow channels 5 may be formed

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o 30 to the surface of the inner shaft 2, for example by milling or turning.

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If desired, the flow channels provided on the inner surface of the outer layer can be machined, for example, by milling.

Figure 2 shows the end of the roll of Figure 1 and partially sectioned in section A-A and B-B of Figure 15. The shear planes of Fig. 2 are located in the center of the circumferential flow channels 7,8 in the transverse direction of the roll 1.

In the uncut area of the lower part of Fig. 2, a first end piece 3 is shown, which comprises a heat transfer fluid supply channel 7a separated by an inner tube as an inner flow channel 10 and a coaxially arranged heat transfer channel outlet 8a. In the flange portion 3a of the end piece 3, fixing screws 9 are provided with a dotted dashed ring. 15 lids 16 are provided to cover the mounting holes 10 of the first flow sleeves 11 and the second flow sleeves 11 '. The mounting holes can also be covered with a single flange.

Section AA illustrates how heat transfer fluid outflow 20 can be led from feed channel 7a to first flow manifold 7b and further to first flow manifolds 7c that are in fluid communication with first ci circular flow chamber 7. The number of first flow manifolds 5 is e.g. songs or any other amount.

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| Section B-B illustrates how the heat transfer medium return flow can be led from one circumferential flow chamber 8 to another flow distribution channel 8c and further to a second flow distribution chamber 8b, o 30, which is in fluid communication with the outlet section 8a of the end piece 3. The number of second flow distribution channels 8c is significantly smaller than the number of return flow channels 5 '14 of the diaper portion, for example four or any other suitable number. The number of first and second flow flow channels may not be the same. The first and second flow distribution channels may not be parallel to each other.

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Flow sleeves 11, 11 'are not shown in sections A-A and B-B. The flow arrangement of Figure 2 comprises, in an envelope section, alternately flow outflow channels 5 and return flow channels 5 '. Any other subdivision of the outflow channels 5 and the return flow channels 5 'may be possible.

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Figure 3 shows in more detail than Figure 1 the first end region of the roll 1 having a flow connection F1 formed by the first flow sleeve 11 between the first circumferential flow chamber 7 and the outflow channel 5. Fig. 4 shows, respectively, the end region of the roll 1 having a flow connection F2 formed by the second flow sleeve 11 'between the second circumferential flow chamber 8 and the return flow channel 5'.

The first flow sleeve 11 and the second flow sleeve 11 'are arranged to be permeable to the first circumferential flow chamber 7 and to the second circumferential flow chamber 8. The direct flow connection between the first and second circumferential flow chambers 7,8 is prevented by providing a seal 12 between the material between the first and second circumferential flow chambers 7,8 cm and each flow sleeve 11,11 ', which allows, if necessary, to rotate and move the flow sleeve 11,11'. in the axial direction, for example, when the flow sleeve or part thereof c \ i is adjusted in mounting hole 10 or removed from mounting hole 10 or | fastened to mounting hole 10.

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The flow sleeve 11,11 'comprises a first flow port and a second flow port between the first end and the second end, and between the first and the second end. The first flow opening 15 enables the heat transfer fluid flow connection between the circumferential flow chamber 7,8 and the inner flow space of the flow sleeve 11,11 'and the second flow opening to provide the flow connection between the inner flow space of the flow sleeve and the flow channel 5.5'.

The flow sleeve 11,11 'may comprise a rigid material or the flow sleeve or part thereof may be made of a flexible or flexible material. The first flow sleeve 11 and the second flow sleeve 11 'differ in the location of the first flow openings. In the first flow sleeve 11 of Figure 3, the distance between the first flow opening and the second flow opening 10 is less than the distance between the first flow opening of the second flow sleeve 11 'and the second flow opening of Figure 4, due to the corresponding difference in circumferential flow chambers relative to the flow channels.

The flow connection formed by the flow sleeve 11,11 'from the circumferential flow chamber to the flow channel of the diaper portion is substantially linear. The non-linear flow path may be understood to be a slight displacement of the heat transfer medium in the radial direction of the flow sleeve between the inner flow space of the flow sleeve and the circumferential flow chamber 20 through at least one flow opening in the flow sleeve. The linear flow connection is preferably made parallel to the axis 1 'of the roll 1, but can also be made inclined relative to the cm axis of the roll. For example, by drilling a plurality of mounting holes 10 to receive flow sleeves 11, 11 'corresponding to the flow passages 5,5' of the shell member, cv The mounting holes 10 may be parallel to the axis of the roll or inclined | at an angle to the axis of the roll.

To cover the mounting hole 10 in a heat transfer retaining and sealing manner 30, the roller 1 may comprise a cover 16 which may be a portion or a separate part of the flow sleeve. The cover may also be a flange common to a plurality of mounting holes 10 or to all 16 mounting holes 10. The locking of the flow sleeve 11,11 'in its operating position may be effected by a different part or by the same part which provides for the possible adjustment of the flow sleeve in the rotational or axial direction. Adjustment of the flow sleeve 11,11 'in the rotational direction can be accomplished by moving the same or different portion of the flow sleeve 11,11' as the flow sleeve adjustment in the axial direction.

The flow sleeves 11,11 'shown in Figures 3 and 4 comprise an insulating member 15. Preferably, the insulating member 15 is provided at one end of the flow sleeve 10 which comprises a second flow opening. Preferably, the open end of the dielectric sleeve 15, which is first installed in the flow hole in the installation hole towards the flow passage 5.5 ', comprises a second flow opening for the flow sleeve. Preferably, the dielectric member 15 is sleeve-like and allows the end portion of the jacket member to be isolated from the thermal 15 by the heat transfer agent when passed through the heat transfer medium. By means of the insulating part 15, it is possible to insulate the thermal effect of the heat transfer medium outside the heat transfer area of the roll 1. The dielectric portion 15 may extend in the end region into a path beyond which the fibrous web W to be treated with the mantle surface does not extend. The insulating part may comprise a cross-section in its end region inside the roll which is in the form of a partial circle. The insulating part may have a bevelled tube shape in its lateral end region when viewed from the side. The insulating member may comprise a polymeric material such as Teflon. The insulating part may comprise a vacuum structure c i, for example between two nested pipes. The insulating part may have pockets on its outer surface c3 to hold, for example, heat transfer fluid o 25.

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| The flow sleeve 11,11 'can be detached from the roll 1 and attached to the roll g without removing the end piece 3,3' from the sheath portion 2,4.

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m σ> o 30 The axial position and / or the position of rotation of the flow sleeve or the portion of the flow sleeve relative to the roll can be adjusted without removing the roll end piece 17 from the housing portion.

The amount of heat transfer medium flowing through the flow sleeve 11,11 'can be adjusted, for example, by changing the axial position of the flow sleeve or flow sleeve portion 5 in the roll. The flow rate can be adjusted by changing the rotational position of the flow sleeve or portion of the flow sleeve in the roll. The flow sleeve or part thereof may be displaced axially so that the area of the first flow opening limited by the circumferential flow chamber wall is adjustable.

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In Figures 3 and 4, the flow sleeves 11,11 'comprise two telescopically movable nested flow tube sections 13 and 14 which can be rotated and / or axially relative to each other (arrows M1). The flow sections each comprise a first flow opening and by moving the flow sections 13,14 relative to each other, the amount of flow through the first flow openings can be adjusted or the flow connection cut off. The insulating member 15 is secured to the flow sleeve 11,11 and movable axially and / or rotationally with respect to at least one of the flow members (arrows M2).

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The first end of the flow sleeve 11,11 'acts as a gripping end of the flow sleeve for detaching, securing or moving the flow sleeve or part of the flow sleeve in the mounting hole 10. The first end of the flow sleeve may comprise: . The first end of the flow sleeve may comprise a flow section | for moving the grip part of the gripping head, for example, by hand or by means of tool g. The first end of the flow sleeve may comprise a gripping head S) for moving the dielectric portion 15, preferably independently independently of the other 11,11 'portions of the flow sleeve.

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The flow sleeves of the roll 1 in Figures 3 and 4 are arranged to be adjustable by removing the cover 16 from the roll end.

Figure 5 shows details of the end area of the roll of Figure 1 from the side without the flow sleeve 5. The mounting hole 10 for the flow sleeve 11,11 'begins at the end face 3c of the first end piece 3, extends through each circumferential flow chamber 7,8, extends past the interface between the end piece 3 and the jacket portion 2,4 and ends in the flow passage 5. Each circumferential flow chamber 7,8 is radially formed. a circumferential groove closed by securing the circumferential cover 7d, 8d. The lids 7d, 8d, which preferably comprise plate-like parts, are preferably secured by welding.

The circular flow chamber may, unlike the figures, be formed as a groove in the axial direction. The annular flow chamber may then be closed by attaching the annular lid. The circumferential flow chamber may be formed axially on the inner face of the end piece or the circumferential flow chamber may be formed axially on the outer surface of the flange portion of the end piece. The circumferential flow chamber 20 may also be provided in the end region of the diaper portion. The circumferential flow chamber may be formed axially at the end of the sheath portion.

The roll 1 may comprise more than one circumferential flow chamber o 25 in the direction of flow in the end region of the roll.

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| The roll 1 may comprise only one circumferential flow chamber in the end region of the roll. In this case, preferably, the flow piece and / or the insulation effect of the insulating part No. 30 can be adjusted by the flow piece.

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The outer layer 4 of the roll 1 may be secured around the inner axis 2 of the roll 1 by a crimping or heat shrinking method, wherein the joint comprises a tension fit between the outer layer 4 and the inner axis 2.

The second end piece 3 'of the roller 1 may comprise a variety of implemented flow arrangements for directing the outflow to the return flow channels 5', for example flow channels which in each case provide a flow connection between one outflow channel 5 and one return flow channel 5 '. The control of the outflow from the outflow channels 5 to the return flow channels 10 5 'may be implemented by a continuous flow groove on the inner face of the second end piece 3'. The end piece 3 'may also include flow channels for controlling the end piece temperature.

According to some embodiments, the second end of the roll 1 is provided with a second end piece 3 'corresponding to the first end piece 3. In this way, for example, the flow of heat transfer medium to the diaper portion can be realized in two directions. Thus, two circumferential flow chambers per roll end region may not be required.

The end view of the diaper portion 2.4 of Figure 6 shows how the heat transfer medium flow passage 5 of the roller 1 of Figure 1 may consist of a flow groove on the outer surface 2a of the inner shaft 2. Part C of Figure 6 shows that the roller 1 may further comprise 5 "peripheral bores as flow channels.

δ c \ i o 25 Figure 7 shows that the sheath portion of roll 1 may comprise exclusively S peripheral bores as flow channels 5 '. Naturally, the roll 1 may comprise | also a sheath portion of a single layer of material having 5 "peripheral bores as flow channels" (not shown in the figures).

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The invention has been described above by way of example with reference to the figures in the accompanying drawings. The invention encompasses all the various embodiments, aspects, and combinations thereof set forth in this document, with only the appended claims limiting the invention.

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Claims (16)

A heatable and / or chillable roller (1) for a fiber web machine, comprising a casing part (2, 4) and end pieces (3, 3 ') attached to the casing part's ends to provide an inlet passage (7a) and an outlet passage (8a) for heat transfer medium in the roll, and the casing portion (2, 4) comprises flow channels (5, 5 ', 5 ") for heat transfer medium, characterized in that the casing portion of the roll (1) comprises an inner layer (2) and an outer layer attached to the inner layer. (4), and the heat transfer medium flow channels (5, 5 ') comprise flow barriers in the outer surface (2a) of the inner layer, in the first end of the roller (1) there is a first circular flow chamber (7) which flows in flow with the heat transfer medium feed or feed (7a; 8a) in the roller, and the roller (1) comprises first flow sleeves (11) arranged in conjunction with the first circular flow chamber (7) so that a respective flow sleeve 15 (11) can be provided. a connection of the heat transfer medium between the first circular flow chamber (7) and the flow channel (5) in the sheath portion (2, 4). 2. A roller according to claim 1, characterized in that in the first end of the roller (1) there is provided a second from the first circular flow chamber (7), a second circular flow chamber (8) which flows in flow with the heat transfer medium arranged in the opposite direction. or cv the discharge channel (8a; 7a) in the roll, and the roll (1) comprises other flow sleeves (11 ') arranged in conjunction with the second flow chamber (8) so that with io 25 and other flow sleeves (11') can be achieved a flow connection for CNJ cv the heat transfer medium between the second circular flow chamber (8) and | the flow channel (5 ') arranged in the opposite direction of flow in the jacket part. v · 00 cv Roll according to claim 2, characterized in that the second flow sleeves (11 ') are arranged to at least partially extend through the second circular flow chamber (8). 4. Vais according to claim 2, characterized in that the first (11) and the second (11 ') flow sleeves are arranged to at least partially extend through both the first (7) and the second (8) circular flow chambers. 5 Roll according to claim 2, characterized in that a direct flow connection between the first (7) and the second (8) circular flow chamber is prevented. Roll according to any of claims 1 to 5, characterized in that the circular flow chamber (7, 8) is arranged at the side of the heat transfer area in the jacket part (2, 4). Roll according to any of claims 1 to 6, characterized in that the first flow sleeves (11) are arranged to at least partially extend through the first circular flow chamber (7). Roll according to any one of claims 1 to 7, characterized in that the flow sleeve (11, 11 ') has a first end and a second end and at least one side at least first flow opening made between the first and second ends and a second flow opening. at the other end. Roll according to any of claims 1 to 8, characterized in that the flow sleeve (11, 11 ') c 1 comprises at least one tubular part. δ (M i o 25 Roll according to any of claims 1 to 9, characterized in that the flow connection created by the flow sleeve c (11,11 ') between the circular flow chamber (7; 8 and the flow channel (5; 5') in the jacket part (2, 4) is essentially linear.00 Roll according to any of claims 1-10, characterized in that the roll (1) is provided with a mounting hall (10) for receiving the respective flow sleeve (11, 11 '). 12. Vais according to claim 11, characterized in that the mounting hole (10) extends from the end surface of the end piece (3, 3 ') to the flow channel (5, 5', 5 ') in the casing part (2, 4) and is provided with a flow-proof cover ( 16). Roll according to any of claims 1-12, characterized in that the flow sleeve (11, 11 ') comprises for heat insulating the end region of the casing part (2, 4) an insulating part (15) which is preferably adjustable (M2) in axial and / or turning direction. Roll according to any of claims 1-13, characterized in that the amount of heat transfer medium flowing through the flow sleeve (11, 11 ') can be controlled by changing the axial position and / or the rotating position (M1) of the flow sleeve or part (13). , 14) of the flow sleeve in the roll, preferably without removing the flow sleeve (11,11 ') from the roll (1). Roll according to any of Claims 1 to 14, characterized in that the flow sleeve (11,11 ') is individually removable from the roll (1) and fastened without removing the end piece (3, 3') from the casing part (2, 4). Roll according to any of claims 1 to 15, characterized in that the first circular flow chamber (7, 8) is a circular latch which is closed by fastening a cover (7d, 8d) in a flow-tight manner. C \ J δ CM CO o CM CM X tr CL 00 CM LO 05 O O CM