EP0923659A1

EP0923659A1 - Suction roll for forming or treating a material web, in particular a paper, cardboard or textile web

Info

Publication number: EP0923659A1
Application number: EP97942871A
Authority: EP
Inventors: Gerhard Kotitschke; Wolfgang Mayer; Hans-Peter Sollinger; Klaus Esslinger; Andreas Meschenmoser; Günther Mohrhardt; Peter Mirsberger
Original assignee: Voith Sulzer Papiermaschinen GmbH; Voith Paper Patent GmbH
Current assignee: Voith Patent GmbH
Priority date: 1996-08-22
Filing date: 1997-08-22
Publication date: 1999-06-23
Anticipated expiration: 2017-08-22
Also published as: CA2263860A1; JP2000516668A; US6200427B1; WO1998007923A1; EP0923659B1; ATE201070T1

Abstract

Suction roll for the formation or treatment of a material web that includes an outer suction roll jacket comprising a perforated rotating hollow cylinder, a non-perforated support body arranged to extend through the outer suction roll jacket and to support the outer suction roll jacket at at least one point of its axial extent, and sealing ribs arranged to extend radially between the support body and the suction roll jacket and axially over a full length of the suction roll jacket. In this manner, the support body is adapted to rotate at a same speed as the suction roll jacket. The support body can include an axially extending, through-going bore arranged concentrically with the outer suction roll surface. An axially extending, rotationally fixed yoke extends through the through-going bore, and the rotationally fixed yoke has two ends which are supported outside of the support body on a frame. At least one support element is arranged to support the support body on the yoke. In this way, a bending line of the support body is capable of being influenced.

Description

Suction roller for forming or treating a material web, such as a paper, cardboard or textile web in particular

The invention relates to a suction roller for forming or treating a material web such as, in particular, a paper, cardboard or textile web, with an outer suction roller shell formed by a perforated rotating hollow cylinder and a non-perforated support body penetrating the suction roller shell, on which the suction roller shell at least at one point on it axial expansion is supported in particular against its own weight, the suction force, the tensile force of an outer circumferential belt and / or an external pressing force.

The previously known suction rolls of this type have i.a. the disadvantage that the line force is limited to a relatively low value. These rollers are therefore not suitable, for example, for use in conjunction with deflection compensation rollers.

The aim of the invention is to provide a suction roll of the type mentioned in the introduction, which can also be used without problems, in particular also in conjunction with associated deflection compensation rolls, and in this case is also particularly suitable for generating higher pressures. In addition, the suction roller should advantageously also be usable in particular as a suction breast or forming or sieve suction roller.

This task is carried out radially between the support body and the suction roll jacket as well as axially over the entire suction roll The length of the sealing ribs extending the suction roll shell is solved according to the invention in that the support body has an axially extending, continuous bore concentric with the outer suction roll surface, that this bore is penetrated by an axially extending, rotationally fixed yoke, which is located at both ends outside the support body a chair is supported, and that the support body is supported by at least one preferably hydrostatic and / or hydrodynamic support element on the yoke and can preferably be influenced in its bending line.

An alternative proposed solution of the invention for a suction roll without ribs is characterized in that the support body has a circular cylindrical outer contour and an axial bore concentric to it, that this bore is penetrated by an axially extending, rotationally fixed yoke, which is attached to both of its yokes Is supported outside of the support body on a frame, that the support body is supported by at least one preferably hydrostatic and / or hydrodynamic support element on the yoke and can preferably be influenced in its bending line and that the support body bears eccentrically on the inner circumference of the suction roll shell, the outer peripheral speed of the support body at least is substantially equal to the inner peripheral speed of the suction roll shell.

Because of this design, significantly higher pressing forces can be generated with minimal effort, the suction roller now being able in particular to also be assigned one or more shoe press units, with which a higher line force can possibly also be achieved, which can be, for example, over 200 kN / m. In addition, the invention Suction roller in particular can also be used as a suction breast or forming or sieve suction roller. Advantageous possible uses result in particular in connection with the formation of pressure zones in forming cylinders. In addition, this expanded application in the forming area takes into account the wire tension or the associated roll bending and the adjustment of the wire tension and wire run lengths across the entire machine width, which is possible using a Nipco (deflection compensation roller) control.

With regard to the second alternative, there are also the advantages mentioned below. A large load capacity is achieved in particular with wide broad nip counter-rollers due to the direct support of the jacket, whereby the line force can be greater than 200 kN / m, for example. With the zone control, an adjustable deflection or contour of the nip profile is possible, since direct support with a more flexible jacket of the support body formed by a nipco or deflection compensation roller and a more flexible suction roller jacket is possible. Since the suction roll jacket can have a thinner wall thickness due to the direct support without ribs, the suction roll jacket is generally less expensive. In addition, there are also lower energy costs for the vacuum to be generated, since less perforated air has to be pumped out due to the smaller wall thickness of the suction roll shell. The manufacturing costs are further reduced in that, in addition to the thin suction roll jacket, a cheap nipco jacket can also be used for the support body and no ribs or other webs are required between the suction roll jacket and the support body. With the ribs provided in the first alternative, a type of cell suction roll results, wherein a frontal suction and / or a different type of suction can be provided. The support body is supported in particular with the means of the different deflection compensation rollers.

In a preferred embodiment of the suction roller according to the invention, which is preferred in practice, at least one non-rotating connection is provided on at least one roller end, which is alternately opposed by the sectors formed by the ribs between the suction roller shell and the support body due to the rotation of the roller, the or the sectors opposite the non-rotating connection are sealed against this connection and are connected via this to a pressure or vacuum source, so that different pressures result for the sectors distributed in the circumferential direction.

In certain cases, unequal suction can deliberately be provided across the width. In practice it can happen, for example, that suction is only carried out at the edge. In addition, an external suction can be provided in combination with a frontal or internal suction.

In an expedient embodiment, the sectors formed by the ribs between the suction roll jacket and the support body are divided in the direction of the roll axis by at least one radially extending partition into at least two axial sections which can be pressurized separately. In certain cases it is expedient if at least one non-rotating connection is provided at both roller ends and the sectors are divided in the direction of the roller axis by at least two axially spaced partition walls into at least three axial sections which can be pressurized separately. In this case, the sectors formed between the suction roll jacket and the support body can be connected via a connecting line to a pressure or vacuum source, which are guided radially inside the sectors in the direction of the roll axis axially outwards in at least one axially central roll zone.

Alternatively, it is conceivable that in at least one axially central roller zone, the sectors formed between the suction roll shell and the support body can be connected via a positive or negative pressure box to a pressure or vacuum source which partially surrounds the suction roll shell from the outside. The at least one axially central roller zone can be formed in all sectors without sealing ribs extending in the axial direction of the roller.

In certain cases, it may be expedient if the support body is supported on the support body in several radial directions by a plurality of support elements or rows of support elements.

In certain applications, it is also advantageous if the support body can be moved radially as a whole together with the suction roll jacket, in order, in particular, to adjust and / or press against a preferably by means of a corresponding lifting movement. to enable the counter-roller formed counter roller. For this purpose, seals can in particular be provided on the roller ends, which allow a common lifting movement of the support body and the suction roll shell, the direction of the lifting movement preferably coinciding with the effective direction of the resulting load and the at least one inner support element arranged between the yoke and the support body and between the fixed yoke and the support body at least one lifting movable support element is provided.

In an expedient embodiment of the suction roller according to the invention designed according to the second alternative, the radial effective direction of the at least one support element arranged between the yoke and the support body falls at least essentially with the direction in which the rotating support body is applied to the inner circumference of the suction roller shell, and at least in essentially also together with the direction in which the resulting load of dead weight, tensile force of an outer belt and / or an external pressing force acts on the suction roll jacket.

In certain applications, it is expedient if the suction roll casing is at least partially enclosed from the outside by an overpressure or vacuum box in order to pressurize the space between the suction roll casing and the support body, including the radial bores provided in the suction roll casing.

The space between the suction roll jacket and the support body can be sealed in the radial direction by at least one extending in the direction of the roll axis and sealed against the inner circumference of the suction roll jacket. tete stationary partition can be divided into at least two axial chambers, at least one of which is connected via a connection to at least one roller end to a pressure wave.

In certain cases, it is expedient if the support body does not contribute to the subdivision of the defined space into at least two axial chambers over its entire axial length. Alternatively, the support body can also contribute to the subdivision of the space in question into at least two axial chambers over its axial length and can cooperate with at least one partition by means of elastic sealing elements.

The suction can thus take place axially, for example, via different chambers within the suction roll shell or via an outer suction box, a combination of these two designs also being conceivable. This can be of particular interest if you want to vacuum in a targeted manner and if the splash water drainage channel is used for external suction. This reduces the amount of perforated air generated at high machine speeds, since the casing bores are no longer exposed to atmospheric pressure, i.e. were filled under normal air pressure and then had to be evacuated again. In particular, the advantages of an externally vacuumed suction roller are thus used.

In an expedient embodiment, the support body and the suction roll jacket are radially displaceable relative to one another, in particular in the bearing areas at the roll ends, seals provided in the area of these roll ends permitting such a relative movement. hen and the direction of the relative stroke movement concerned preferably coincides with the effective direction of the resulting load and the at least one inner support element arranged between the yoke and the support body.

In this case, separate means can be provided, on the one hand to position and / or to press the suction roll jacket against a counter surface preferably formed by a counter roll and on the other hand to support the support body against the inner circumference of the suction roll jacket.

The means for positioning and / or pressing the support body can comprise at least one lifting element arranged between the yoke and the supporting body and can be designed such that the supporting body can perform a lifting movement over its entire axial length.

Sealing can take place in particular in the way that is also the case with deflection compensation rollers (Nipco rollers) with a radially displaceable jacket as a whole. Any partition walls that are provided can be attached, for example, to the non-rotating side seals.

The support body can be provided on its outer surface with circumferential grooves lying in a respective radial plane, spiral circumferential grooves, elevations, bumps, recesses and / or the like, so that there is a discontinuous line of contact or surface between the support body and the inner circumference of the suction roll shell. Alternatively, it is also conceivable for the suction roll jacket to be provided on its inner circumferential surface with such inner circumferential grooves lying in a respective radial plane, spirally circumferential grooves, elevations, protrusions, recesses and / or the like.

A layer of an elastic material such as, in particular, plastic and / or the like can be provided on the outside of the support body or on the inside of the suction roll shell in order to dampen vibrations and / or to compensate for unevenness due to deposits.

In addition, it is conceivable for the support body to be made entirely of an elastic material such as, in particular, rubber, plastic, plastic with reinforcements such as, in particular, a spiral spring or glass or carbon fibers, i.e. CFK / GFK, and / or the like.

Both the suction roll according to the invention and the second alternative according to the invention can form, for example, with at least one counter surface an elongated press nip or wide nip, the respective counter surface by means of a shoe press unit, in particular a shoe press roll comprising a circumferential flexible roll jacket, with at least a press shoe preferably having a concave contact surface can be formed.

In certain applications, it may be useful if the suction of the suction roll jacket is at least one chamber-like Sector takes place within the suction roll shell and at least one outer suction box is provided for the simultaneous suction of the suction roll shell over the remaining circumference of the shell in order to maintain a minimum vacuum in the radial bores of the suction roll shell, the outer suction box preferably also being provided for collecting and forwarding splash water.

The support body, which is constructed in particular in the manner of a deflection compensation roller, can be driven in the manner known per se for such deflection adjustment rollers. The suction roll jacket can be driven both via the support body formed by a deflection adjustment roll and also via a felt guided over the suction roll or a counter roll.

The covering of the holes provided in the suction roll jacket by the support body in the nip area, which forms a kind of deflection compensation roll, is harmless, since no suction takes place in the nip area anyway, after the holes are blocked by the outer surface, for example formed by a counter roll, and the roll on this The position is therefore to be regarded as a blind drilled roller.

The invention is explained below using exemplary embodiments with reference to the drawing; in this show:

Figure 1 is a schematic cross-sectional view of a first embodiment of a suction roll with a coaxial to the roll axis, via ribs with the Support body connected to the suction roll shell, the suction roll forming an extended press nip with a shoe press roll,

Figure 2 is a schematic longitudinal sectional view of the in

FIG. 1 shows the suction roll, an overpressure or vacuum box associated with this suction roll also being recognizable,

3 shows a schematic cross-sectional view of a further embodiment of a suction roll with a support body lying eccentrically on the inner circumference of the suction roll casing, the suction roll forming an extended press nip with a shoe press roll and a further press nip with a further counter roll,

FIG. 4 shows a schematic cross-sectional view of a further embodiment of a suction roll with a support body lying eccentrically on the inner circumference of the suction roll shell, the suction roll wrapped in felt resting on the one hand against a sieve and on the other again forming an extended press nip with a shoe press roll,

Figure 5 is a schematic cross-sectional view of another embodiment of a suction roll an eccentric support body lying against the inner circumference of the suction roll shell, the suction roll wrapped in felt resting against a sieve and forming an extended press nip with a shoe press roll and a further press nip with another counter roll,

FIG. 6 shows a schematic, longitudinally sectioned partial view of the suction roll shown in FIG. 5, the partition wall to be seen in FIG. 5 being omitted for the sake of clarity, and

FIG. 7 shows a schematic cross-sectional view of a further embodiment of a suction roll used as a forming roll with a support body lying eccentrically on the inner circumference of the suction roll casing.

FIG. 1 shows a schematic cross-sectional view of a first embodiment of a suction roll 20 for forming or treating a material web, in the present case a paper web.

The suction roll 20 comprises an outer suction roll casing 1 formed by a perforated rotating hollow cylinder, a non-perforated support body 2 passing through the suction roll casing 1, on which the suction roll casing 1 at least at one point of its axial extent, in particular against its own weight, the suction force, the tensile force of an outer circumferential one Band 8, 9 and / or one acting from the outside Press force is supported, and radially between the support body 2 and the suction roll jacket 1 and axially extending over the entire length of the suction roll jacket sealing ribs 11, via which the concentric to the suction roll jacket 1, at the same speed as this rotating support body 2 firmly connected to the suction roll jacket 1 is.

The welding beads shown in this figure 1 between the ribs 1 1 and the suction roll jacket 1 or the support body 2 are to be understood symbolically for the tight fit between these elements, which in principle can also be realized in other ways.

As can also be seen in particular in FIG. 2, the support body 2 has an axially extending, continuous bore 19 which is concentric with the support body axis. This bore is penetrated by an axially extending, rotationally fixed yoke 3, which extends at both ends outside the support body 2 a chair of the paper machine in question is supported.

The support body 2 is supported on the yoke 3 by a plurality of preferably hydrostatic and / or hydrodynamic support elements 4 and can preferably be influenced in its bending line.

As can be seen from FIGS. 1 and 2, at least one non-rotating connection 14 is provided on at least one roller end, which the sectors 12 formed by the ribs 11 between the suction roller jacket 1 and the support body 2 alternately lie opposite due to the rotation of the roller, the non-rotating connection 14 opposite sectors 12 are sealed off from this connection 14 and are connected to a pressure or vacuum source so that there are different pressures for the sectors 12 distributed in the circumferential direction.

According to FIG. 2, the sectors 12 formed by the ribs 11 between the suction roll jacket 1 and the support body 2 are in the direction of the roll axis through at least one radially extending partition 13 in at least two axial, chamber-like sections A, B; D divided. In the present case, the sectors 12 are divided in the direction of the roller axis by two axially spaced partition walls 13 into three axial sections which can be pressurized separately, only one of the two partition walls 13 being visible in FIG.

According to FIG. 2, in the axially central roller zone D, the sectors 12 (see also FIG. 1) formed between the suction roller shell 1 and the support body 2 are connected via a positive or negative pressure box 15 to a pressure or vacuum source which connects the suction roller shell 1 from the outside partially encloses.

In the present case, the axially central roller zone D is formed in all sectors 12 without ribs extending in the axial direction of the roller. The support elements 4 are arranged in a row parallel to the roller axis.

In the embodiment shown in FIGS. 1 and 2, the suction roll 20 forms with a shoe press roll 7 serving as a counter roll a double felted press nip elongated in the direction of travel of the paper web. The two felts 8 and 9 guided through this extended press nip can be seen in FIG. 1.

The support body 2 can be radially displaceable overall together with the suction roll jacket 1, in order to enable, in particular, positioning and / or pressing against the respective counter surface by means of a corresponding lifting movement.

Seals 16 (cf. in particular FIG. 2) are provided at the roller ends, which allow a common lifting movement of the support body 2 and of the suction roll shell 1. The direction of the lifting movement can preferably coincide with the effective direction of the resulting load and the inner support elements arranged between the yoke 3 and the support body 2. This lifting movement can be brought about, for example, by the lifting elements 4 provided between the fixed yoke 3 and the support body 2.

FIGS. 3 to 7 each show an embodiment of a suction roller 20 without ribs, in which the support body bears eccentrically on the inner circumference of the suction roller shell 1.

The respective support body 2 has, as in the exemplary embodiment described above, a circular cylindrical outer contour and a concentric through-going axial bore 19 which is penetrated by an axially extending, rotationally fixed yoke 3, which at both ends outside of the support body 2 on a frame of the relevant paper machine is supported. In addition, the support body 2 again supported by several, preferably hydrostatic and / or hydrodynamic support elements 4, arranged in a row parallel to the roller axis, on the yoke 3 and can preferably be influenced in its bending line. The support body 2 is thus again designed in the manner of a deflection compensation roller, in which case the jacket of this support body 2 rolls loosely, ie without any special mechanical fastening, in the suction roller jacket 1.

In the exemplary embodiment according to FIG. 3, the suction roll 20 forms, with a shoe press roll 7, a press nip which is extended in the web running direction of the material web and is double felted again with the two felts 8, 9. In addition, the suction roll 20 forms a further press nip, which in this case is not lengthened, with a counter roll 6 having a rigid roll jacket.

In the embodiment shown in FIG. 4, the suction roll 20 wrapped in a felt 8 rests on the one hand on a wire 10 of a wire section and on the other hand on a shoe press roll 7, with which it again forms a press nip which is extended in the web running direction of the material web.

In the exemplary embodiment shown in cross section in FIG. 5, the suction roll 20, which is wrapped in a felt 8, again bears against a wire 10 of a wire section. With a shoe press roll 7 wrapped around by a felt 9, it again forms a press nip which is extended in the web running direction of the material web and is double felted with the two felts 8 and 9. An end region of this suction roll 20 is shown in longitudinal section in FIG.

In the exemplary embodiment shown in FIG. 7, the suction roll serves as a forming roll, over which both a wire belt 8 and the wire 10 are guided, the fiber suspension supplied by a headbox 22 in the manner shown in that between the belt 8 and the wire 10 formed gap is introduced. The material web 18 formed is then continued with the belt 8.

In all of the exemplary embodiments shown in FIGS. 3 to 7, the radial effective direction of the support elements 4 arranged between the yoke 3 and the support body 2 coincides with the direction in which the rotating support body 2 is applied to the inner circumference of the suction roll shell 1.

In the embodiments according to FIGS. 3 to 5, it also coincides with the direction of action of the shoe press roll 7. In addition, the respective tensile force of the straps 8, 9 and 10 is also absorbed by these support elements 4. This also applies in particular to the exemplary embodiment shown in FIG. 7, in which the suction roll 20 is used as a forming roll and the tensile force of the belts 8 and 10 must be absorbed by the support elements 4.

The expanded application in the forming area shown in FIG. 7 is also about the wire tension or the associated roll bending and the possible adjustment by the Nipco control. adjustment of the screen tension and screen run lengths across the entire machine width.

The seal between the support body 2 provided in the form of a deflection compensation roll or nipco roll and the suction roll casing 1 can be seen in a sketchy manner in FIG. The partitions 5 are fastened to the non-rotating side seals 17 (see Figure 6).

Claims

Patent claims

1. suction roller (20) for forming or treating a material web

(18) such as, in particular, a paper, cardboard or textile web, with an outer suction roll jacket (1) formed by a perforated rotating hollow cylinder, a non-perforated support body (2) penetrating the suction roll jacket (1) to which the suction roll jacket (1) at least one point of its axial extension is supported, in particular, against its own weight, the suction force, the tensile force of an outer circumferential belt (8, 9, 10) and / or an external pressing force, and radially between the support body (2) and the suction roll jacket (1) and sealing ribs (11) which extend axially over the entire length of the suction roll casing (1) and via which the support body (2) rotating at the same speed as the suction roll casing (1) is firmly connected to the suction roll casing (1), characterized in that the support body (2) has an axially extending continuous bore (19) concentric with the outer suction roll surface zt that this bore (19) is penetrated by an axially extending non-rotatable yoke (3) which is supported at its two ends outside the support body (2) on a frame, and that the support body (2) by at least one preferably hydrostatic and / or hydrodynamic support element (4) is supported on the yoke (3) and can preferably be influenced in its bending line.

2. Suction roll according to claim 1, characterized in that at least one non-rotating connection (14) is provided on at least one roll end, to which the sectors (12) formed by the ribs (11) between the suction roll casing (1) and the support body (2) ) due to the rotation of the roller alternately opposite, the or the non-rotating connection (14) opposite sectors (12) sealed against this connection (14) and connected to a pressure or vacuum source, so that for the sectors (12) distributed in the circumferential direction result in different pressures.

3. Suction roll according to claim 1 or 2, characterized in that the sectors (12) formed by the ribs (11) between the suction roll casing (1) and the support body (2) in the direction of the roll axis through at least one radially extending partition (13 ) are divided into at least two axial sections (A, B; D) which can be pressurized separately.

4. Suction roll according to claim 2 and 3, characterized in that at least one non-rotating connection (14) is provided at both roll ends and that the sectors (12) in the direction of the roll axis by at least two axially spaced partition walls (13) in at least three axial sections which can be pressurized are divided separately.

5. Suction roll according to claim 4, characterized in that in at least one axially central roll zone (D) between the suction roll casing (1) and the support body (2) formed sectors (12) via connecting lines with a pressure or vacuum source can be connected are guided radially inside the sectors (12) in the direction of the roller axis axially outwards.

6. Suction roll according to claim 4, characterized in that in at least one axially central roll zone (D) between the suction roll jacket (1) and the support body (2) formed sectors (12) via a pressure or vacuum box (15) with a pressure - Or vacuum source can be connected, which partially surrounds the suction roll jacket (1) from the outside.

7. Suction roll according to claim 6, characterized in that the at least one axially central roll zone (D) is formed in all sectors (12) without sealing ribs extending in the axial direction of the roll.

8. Suction roll according to one of the preceding claims, characterized in that the support body (2) is supported by a plurality of support elements (4) or rows of support elements in a plurality of radial directions on the support body (2).

9. Suction roll according to one of the preceding claims, characterized in that the supporting body (2) together with the suction roll casing (1) is radially displaceable overall, in particular by a corresponding lifting movement, in particular starting and / or pressing against a preferably by a counter roll (7 ) to enable the formed counter surface.

10. Suction roll according to claim 9, characterized in that seals (16) are provided on the roll ends, which allow a common lifting movement of the support body (2) and the suction roll casing (1), and that the direction of the lifting movement preferably with the effective direction of the resulting Load and the at least one inner support element (4) arranged between the yoke (3) and the support body (2) coincides, at least one lifting-movable support element (4) being provided between the fixed yoke (3) and the support body (2).

1 1. Suction roller for forming or treating a material web such as in particular a paper, cardboard or textile web, with an outer suction roller jacket (1) formed by a perforated rotating hollow cylinder and a non-perforated support body (2) penetrating the suction roller jacket (1) the suction roll jacket (1) at least at one point of its axial extent, in particular against its own weight, the suction force, the Tractive force of an outer circumferential band (8, 9, 10) and / or an external pressing force is supported, characterized in that the support body (2) has a circular cylindrical outer contour and an axial bore (19) which is concentric with this, so that this Bore (19) is penetrated by an axially extending, rotationally fixed yoke (3) which is supported on a frame at its two ends outside the support body (2) such that the support body (2) is supported by at least one preferably hydrostatic and / or hydrodynamic support element (4) is supported on the yoke (3) and can preferably be influenced in its bending line and that the support body (2) bears eccentrically on the inner circumference of the suction roll shell (1), the outer circumferential speed of the support body (2) being at least substantially equal to the inner circumferential speed of the suction roll shell ( 1) is.

12. Suction roll according to claim 11, characterized in that the radial effective direction of the at least one support element (4) arranged between the yoke (3) and the support body (2) coincides at least substantially with the direction in which the rotating support body (2) is applied to the inner circumference of the suction roll casing (1), and at least essentially coincides with the direction in which the resulting load from its own weight, tensile force of an outer belt (8, 9, 10) and / or an external pressing force on the suction roll casing ( 1) acts.

13. Suction roll according to claim 11 or 12, characterized in that the suction roll casing (1) from the outside is at least partially enclosed by an overpressure or vacuum box (15) to include the space between the suction roll casing (1) and the support body (2) pressurize the radial bores provided in the suction roll jacket (1).

14. Suction roll according to one of claims 11 to 13, characterized in that the space between the suction roll casing (1) and the support body (2) in the radial direction by at least one extending in the direction of the roll axis against the inner circumference of the suction roll casing (1) sealed stationary partition (5) is divided into at least two axial chambers (A, B), at least one of which is connected to a pressure source via a connection to at least one roller end.

15. Suction roll according to one of claims 14, characterized in that the support body (2) does not contribute to dividing the relevant space into at least two axial chambers (A, B) over its entire axial length.

16. Suction roll according to one of claims 14, characterized in that the support body (2) over its axial length to subdivide the space in question into at least two axial Kam- mers (A; B, C) and preferably cooperates with at least one partition (5) by means of elastic sealing elements.

17. Suction roll according to one of claims 11 to 16, characterized in that the support body (2) and the suction roll casing (1) are radially displaceable relative to one another, particularly in the bearing areas at the roll ends, such seals permitting such relative movement being provided in the area of these roll ends and that the direction of the relative stroke movement concerned preferably coincides with the effective direction of the resulting load and the at least one inner support element (4) arranged between the yoke (3) and the support body (2).

18. Suction roll according to claim 17, characterized in that separate means are provided, on the one hand the suction roll jacket (1) to a preferably formed by a counter roll (6, 7) counter surface and on the other hand the support body (2) on the inner circumference of the suction roll jacket (1 ) and / or press on.

19. Suction roll according to claim 18, characterized in that the means for positioning and / or pressing the support body (2) comprise at least one between the yoke (3) and the support body (2) arranged movable support element (4) and so are carried out that the support body (2) can perform a lifting movement over its entire axial length.

20. Suction roll according to one of the preceding claims, in particular according to claim 11 and 15, characterized in that the support body (2) on its outer surface with circumferential grooves lying in a respective radial plane, spirally circumferential grooves, elevations, bumps, recesses and / or the like is, so that there is a discontinuous line of contact or surface between the support body (2) and the inner circumference of the suction roll shell (1).

21. Suction roll according to one of the preceding claims, in particular according to claim 11 and 13, characterized in that the suction roll jacket (1) on its inner circumferential surface with inner circumferential grooves lying in a respective radial plane, spirally circumferential grooves, elevations, bumps, recesses and / or the like is, so that there is a discontinuous line of contact or surface between the inner circumference of the suction roll shell (1) and the support body (2).

22. Suction roll according to one of the preceding claims, in particular according to one of claims 11, 13, 14, 15, 16, 20 or 21, characterized in that on the outside of the support body (2) or on the inside of the suction roll casing (1) a layer an elastic material such as special plastic and / or the like is provided to dampen vibrations and / or to compensate for unevenness due to deposits.

23. Suction roller according to one of the preceding claims, in particular according to one of claims 11, 13, 14, 15, 16, 20 or 21, characterized in that the support body (2) overall with an elastic material such as rubber, plastic, plastic with Reinforcements such as in particular a spiral spring or glass or carbon fibers, ie CFK / GFK, and / or the like.

24. Suction roll according to one of the preceding claims, in particular according to claim 1 or 11, characterized in that it forms with at least one counter surface an extended press nip or wide nip in the web running direction and that the counter surface by a shoe press unit, in particular a shoe press roll comprising a circumferential flexible roll shell ( 7), is formed with at least one press shoe which preferably has a concave contact surface.

25. Suction roll according to one of the preceding claims, in particular according to one of claims 2 to 6 and 13 to 16, characterized in that the suction of the suction roll casing (1) via at least one chamber-like sector within the suction roll casing (1) and that for the simultaneous suction of the suction roll casing (1) over the remaining circumference of the casing at least one outer suction box is provided in order to maintain a minimum vacuum in the radial bores of the suction roll casing (1), the outer suction box preferably also being provided for collecting and conveying splash water .