DE29701002U1 - Press roll for treating web-like goods and shoe press with such a press roll - Google Patents

Description

EUROPEAN PATENT ATTORNEYS -.PATEiNT- UNO

MANNITZ,

MANlTZ, FINSTERWALD & PARTNER · P.O. BOX 22 16 11 ■ 80506 MUNICH

Voith Sulzer
Paper Machines GmbH St. Pöltener Straße 43

89522 Heidenheim

j&j PJi

GERMAN PATENT ATTORNEYS DR. GERHART MANITZ · dipl.-phys.

MANFRED FINSTERWALD · Dipl.-Ing., Dipl.-Wirtsch.-Ing.

DR. HELIANE HEYN · dipl.-chem.

DR. MARTIN FINSTERWALD · dipl.-ing.

STEPHAN THUL · dipl.-phys.

DR. DIETER PELLKOFER · dipl.-ing.

CHRISTIAN SCHMIDT · dipl.-phys.

GÜNTHER KURZ ■ dipl.-ing.

WERNER GRÄMKOW · Dipl.-Ing. (-1983)

BRITISH CHARTERED PATENT ATTORNEY JAMES G. MORGAN · B. se. (phys.), d.m.s.

LAWYER

MARION CHRISTIANE SCHMIDT

REPRESENTATIVES BEFORE THE EUROPEAN PATENT OFFICE

80506 MUNICH

PO BOX 22 1 6 11 · ROBERT-KOCH-STRASSE TELEPHONE (089) 21 99 430 · FAX (089) 29 75

DATE

21 January 1997 S 6378-Dt/Ru

Press roll for treating web-shaped material and shoe press with such a press roll

MANlTZ · FINSTERWALD · HEYN ■ MORGAN · FINSTERWALD · SCHMIDT · PELLKOFER · SCHMIDT · KURZ · 80538 MUNICH ■ ROBERT-KOCH-STRASSE 1 · TAX No. DE 130 001 124

STEPHAN THUL · 70372 STUTTGART (BAD CANNSTATT) · SEELBERGSTRASSE 23/2S · TELEPHONE !0711) 56 72 61 HYPOBANK MUNICH · 6 880 119 980 ■ Bank code 700 200 01 · POSTBANK MUNICH · 770 62-805 · Bank code 700 100 80 · VEREINSBANK MUNICH · 578 351 ■ Bank code 700 202 70

S 6378-Dt/Ru

Description

The present invention relates to a press roll for treating web-shaped material, in particular for dewatering a fibrous web, with a flexible press cover, the ends of which are attached to a tensioning disk sitting on a cross member via fastening elements, with the press cover being clamped between the tensioning disks. The invention is also directed to a shoe press with a press roll of this type.

The flexible press cover of a press roll of the type mentioned above is usually pressed radially against a counter body, for example a rotatable counter roll, via an oil-lubricated press shoe arranged inside the press roll. The fibrous web to be dewatered is guided through the press gap formed between the press roll and the counter roll and dewatered by the pressure prevailing in the press gap.

The cross member usually has end pins at both ends on which the tensioning discs are mounted so they can rotate. This allows the press roller to rotate relative to the stationary cross member.

One problem with such press rollers is that, especially at high rotation speeds, the press roller must run as evenly as possible. If the runout exceeds a certain value, this can lead to a reduction in the service life of the press cover or even to damage to the paper web. The

The higher the rotation speed of the press roller, the better the concentricity of the press sleeve.

It is therefore essential that when the press cover is attached to the clamping disks, the press cover is centered in terms of its circumference so that it can rotate with as little radial runout as possible. In particular, the radial runout that occurs in the free area to the side outside the press zone formed by the press gap must be minimized.

The concentricity of the press sleeve is not only dependent on the concentricity of the clamping disks, but also, for example, on the care of the staff when clamping a new press sleeve. It has been found that the uniformity of the longitudinal stress distribution of the press sleeve over its circumference has a significant influence on the quality of the achievable concentricity of the press roll. Since the press sleeve sags in the middle of the roll compared to the roll ends due to its own weight during clamping, it is difficult to achieve a uniform longitudinal stress distribution over the entire circumference of the press sleeve, so that an unconcentricity of the press sleeve is the inevitable result.

It is therefore an object of the present invention to create a press roller and a shoe press of the type mentioned above with improved concentricity properties. In this case, not only a simple eccentric runout, but also more complex forms of imbalance should be avoidable, in particular also be able to be compensated for subsequently.

This task is solved on the basis of a press roll of the type mentioned at the beginning in that at least in the area of a clamping disc, adjustment elements are provided by means of which the circumferential shape of the press jacket in the radial direction or the

axial tension of the press sleeve is adjustable over its circumference.

The adjustment elements provided according to the invention ensure that the support and clamping of the press jacket can be changed over its circumference both when clamping a new press jacket and when the press jacket is already installed. The latter may be necessary, for example, if excessive runout occurs during operation.

Furthermore, using the adjustment elements according to the invention, it is possible to compensate not only for simple, eccentric runout, but also for any complex form of runout. In particular, an imbalance that occurs during assembly of the press jacket due to its own weight can be compensated for after assembly using the adjustment elements. For this purpose, the press jacket can be rotated into different positions, for example, whereby the longitudinal tension over the entire circumference of the press jacket is readjusted each time using the adjustment elements until a uniform longitudinal tension is achieved over the entire circumference.

According to a preferred embodiment of the invention, a large number of adjustment elements are provided distributed in the circumferential direction of the press jacket, whereby the adjustment elements can be adjusted independently of one another. The large number of adjustment elements ensures that a differentiated adjustment option is available over the entire circumference of the press jacket, whereby the independence of the adjustment elements from one another also allows complex non-circular running properties to be compensated for.

According to a further advantageous embodiment of the invention, the end region of the press jacket is in engagement with the adjustment elements, whereby the adjustment elements are each adjustable in the longitudinal direction of the press jacket ends. In particular, the adjustment elements are designed as holding elements for holding the press jacket ends.

This design makes it easy to vary the longitudinal tension of the press cover over its circumference. This means that, for example, the runout that occurs when the press cover sags in the middle of the machine when clamped can be compensated for by setting a higher longitudinal tension in the upper half of the clamping disks by moving the holding elements in the longitudinal direction of the press cover ends.

According to a further preferred embodiment of the invention, receiving elements, in particular openings, are provided in the end region of the press jacket, into which the adjustment elements, in particular designed as pins, engage. The pins are preferably designed as eccentric elements which can be rotated eccentrically to their axis about an essentially parallel axis of rotation.

The design of the adjustment elements as pins makes it easier to assemble the press cover, since the press cover can simply be hooked into the pins using the openings provided after it has been tensioned. The required adjustment of the longitudinal tension of the press cover can then be carried out using the pins designed as eccentric elements.

According to a further advantageous embodiment, the adjustment elements are formed on the front side of the clamping disc, whereby in particular the axis of rotation of the adjustment elements formed as eccentric elements is essentially parallel to the

Longitudinal axis of the cross member. This ensures that the adjustment elements are easily accessible from the outside, so that the longitudinal tension can be easily adjusted over the circumference of the press jacket. In principle, however, it is also possible to provide the adjustment elements not on the front side of the clamping disk, but on the peripheral side of the clamping disk.

According to a further preferred embodiment of the invention, the adjustment elements are arranged inside the press roller in its end region and comprise pressure elements with which the press jacket can be subjected to pressure directed essentially radially outwards from the inside. For this embodiment, the concentricity can be influenced either during the rotation of the press jacket or during operation by changing the jacket contour. By changing the jacket contour, a significant improvement in concentricity can be achieved either instead of or in conjunction with changing the longitudinal tension over the circumference of the press jacket.

The pressure elements can comprise radially displaceable or tiltable elements that rest on the inside of the press cover essentially over the entire circumferential area of the press cover. In particular, the pressure elements can be designed as a segment ring with an essentially truncated cone-shaped surface, which is arranged essentially concentrically within the press roller, perpendicular to the longitudinal axis of the cross member and, in particular, has radially extending longitudinal slots in its base area with the largest diameter. By spreading the longitudinal slots, the outer diameter of the segment ring can be increased, so that the circumferential shape of the press cover resting on the outside of the segment ring can also be changed accordingly.

By attaching the segment ring to a support member which is arranged essentially axially displaceably within the press jacket, the segment ring can be easily expanded using tension screws provided on the clamping disk, via which the support member can be axially displaced.

According to a further advantageous embodiment of the invention, the segment ring consists of a plurality of segment ring sections separated from one another. Preferably, the carrier element also consists of a plurality of carrier element sections, in particular those that can be moved independently of one another, one of which is advantageously assigned to a corresponding segment ring section. This allows the circumferential shape of the press jacket to be adjusted very variably over its entire circumference.

According to a further advantageous embodiment of the invention, the clamping disk comprises a radially inner clamping disk inner ring and a radially outer clamping disk outer ring, whereby the clamping disk outer ring can be displaced in a radial plane relative to the clamping disk inner ring by means of the adjusting elements. This embodiment of the invention also makes it possible to adjust the circumferential shape of the press jacket in the radial direction, whereby the imbalance caused by the displacement of the clamping disk outer ring is normally tolerable due to the low mass of the clamping disk outer ring. However, it is fundamentally possible to compensate for the imbalance caused by the displacement of the clamping disk outer ring by compensating balancing weights on the clamping disks.

Further advantageous embodiments are specified in the subclaims.

The invention is described in more detail below using an embodiment with reference to the drawings; in which

Figure 1 is a schematic partial cross-section through a shoe press designed according to the invention,

Figure 2 is a detailed view of the shoe press according to Figure 1,

Figure 3 another detailed view of the shoe press according to Figure I ₇

Figure 4 is a side view of the press roller of the shoe press according to Figure 1,

Figure 5 shows a cross section through part of a press roll designed according to the invention,

Figure 6 shows a cross section through part of a further embodiment of a press orphan designed according to the invention,

Figure 7 shows a cross section through part of a further embodiment of a press roll designed according to the invention and

Figure 8 is a side view of a press roll constructed according to Figure 7.

Figure 1 shows a shoe press 1 which comprises a press roll 2 and a counter roll 3, which form a press gap 4 between them.

The press roller 2 comprises a flexible press sleeve 5, which is attached by its ends 6, 7 to tensioning disks 8, 9. The

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Tensioning disks 8, 9 are rotatably mounted on end pins 10, 11 of a cross member 12, so that the flexible press sleeve 5 can rotate around the cross member 12.

In addition to the rotatable mounting on the end pins 10, 11 of the cross member 12, the clamping disks 8, 9 are also mounted so that they can be displaced longitudinally, whereby they can be pre-tensioned in the direction of the ends of the end pins 10, 11 by spring elements (not shown).

Cylinders 13 with pistons 14 are provided on the cross member 12, through which a beam-shaped press shoe 15 can be pressed radially against the inside of the press jacket 5. A paper web (not shown) arranged in the press gap 4 and any felt web that may be present are pressed against the surface of the counter roller 3 via the press shoe 15 and the press jacket 5.

The counter roll 3 has end pins 16, 17 at its ends, which are mounted in schematically shown supports 18, 19. The end pins 10, 11 of the cross member 12 are also attached to the supports 18, 19, whereby the supports 18, 19 hold the press roll 2 and the counter roll 3 together against the pressure exerted between the two rolls 2, 3 via the cylinders 13 and pistons 14.

The clamping disc 8 comprises a rotatable, cylindrical base body 20 and a clamping ring 22 fastened to the base body via schematically shown screws 21.

As can best be seen from Figure 2, the free end 6 of the press jacket 5 is bent in the direction of the cross member 12, so that the jacket end 6a projecting radially inwards is clamped between the base body 20 and the clamping ring 22 and fixed by the screws 21.

On the inner end face of the base body 20, radially outwardly positive-locking jacket centering elements 23 are provided (see Figure 1).

The base body 20 has on its outer front side a threaded hole 24 in which an eccentric clamping pin 25 is arranged so as to be rotatable. The clamping pin 25 comprises a threaded shaft screwed into the threaded hole 24 with a longitudinal axis 27 and a clamping pin 28 formed on the front side of the threaded shaft 26 with a longitudinal axis 29 which is displaced parallel to the longitudinal axis 27 by the distance e.

At the free end of the clamping pin 28, a slot 30 is formed, which can be reached through a hole provided in the clamping ring 22, for example with a screwdriver, so that the clamping pin 25 can be rotated in the threaded hole 24.

The radially inwardly bent end 6a of the press jacket 5 has a plurality of openings 32 in the circumferential direction, through which the clamping pins 28 of a plurality of clamping pins 25 distributed in the circumferential direction of the base body 20 protrude, so that the press jacket 5 is held over its entire circumference by the clamping pins 25.

By turning each of the clamping pins 25 with the screw 21 loosened, the end 6a of the press jacket 5, which is bent radially inwards, can be moved radially inwards or outwards by the distance 2e, so that the press jacket 5 experiences an axial clamping movement of up to 2e over its longitudinal extent. The longitudinal tension of the press jacket 5 can thus be adjusted very variably over its circumference using the eccentric clamping pins 25. The finer the adjustment, the more precise the setting.

The more clamping pins 25 are provided on the clamping disk 8, the more easily the longitudinal tension can be set over the circumference. The adjustment of the longitudinal tension of the press jacket 5 can be carried out when assembling the press jacket 5 by first hanging the press jacket 5 on the clamping pins 25 via the openings 32 provided in the radially inwardly bent end and then adjusting the longitudinal tension over the entire circumference of the press jacket to the desired value by turning the individual clamping pins 25. After adjustment has been made, the screws 21 are tightened, whereby the clamping ring 22 is pulled against the front side of the clamping disk 8 and the radially inwardly bent end 6a of the press jacket is clamped and fixed between the clamping ring 22 and the clamping disk 8.

In the event that the concentricity of the press roller 2 changes during operation and requires readjustment, the clamping ring 22 can be loosened by loosening the screws 21, whereupon the required longitudinal tension in the desired circumferential area of the press jacket 5 can be restored by turning the corresponding clamping pins 25. Then the adjustment of the longitudinal tension can be fixed again by the clamping ring 22.

While in Figures 1 and 2 the clamping pins 25 are arranged on the outside front side of the base body 20, it is also possible in principle to provide the clamping pins 25 on the radially outer circumferential side of the base body 20. In this design, openings are provided in the area of the radially outer end 6 of the press jacket 5 through which the clamping pins 25 protrude.

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Figure 3 shows a detailed view of the clamping disk 9 shown in the right half of Figure 1, which represents a further embodiment of the invention.

The clamping disc 9 comprises a clamping disc inner ring 33 rotatably mounted on the end pin 11 of the cross member 12, a clamping disc outer ring 35 connected to it via screws 34 and a conical clamping ring 36 (see Figure 1).

The clamping disc outer ring 35 has a through hole 37 which has a larger diameter than the shaft of the screw 34. The screw 34 is guided through the through hole 37 and screwed into a threaded hole 38 provided in the clamping disc inner ring 33. Due to the play between the shaft of the screw 34 and the wall of the through hole 37, a limited radial displacement of the clamping disc outer ring 35 relative to the clamping disc inner ring 33 is possible.

For radial displacement of the clamping disc outer ring 35, it has a threaded hole 39 on its radially inner side into which a centering screw 40 is screwed. The head of the centering screw 40 rests against an axially extending extension 41 of the clamping disc inner ring 33, so that by turning the centering screw 40, a radial movement of the clamping disc outer ring 35 relative to the clamping disc inner ring 33 occurs.

As can be seen from Figure 1, the free end 7 of the press jacket 5 is clamped between the radially outer side of the clamping disk outer ring 35 and the cone clamping ring 36, whereby the jacket end 7 is fixed between the clamping disk outer ring 35 and the cone clamping ring 36 by screws 21.

The adjustment of the circumferential shape of the press sleeve 5 is carried out after clamping the press sleeve end 7 between the clamping disk outer ring 35 and the conical clamping ring 36 or when the press sleeve end 7 is already clamped in place, by first loosening the clamping screws 34 in the circumferential area to be changed, whereupon the desired area of the clamping disk outer ring 35 is moved radially outwards or inwards by turning the corresponding centering screw or centering screws 40.

If the clamping disk outer ring 35 consists of a rigid piece, opposing centering screws 40 must be turned in opposite directions to enable radial displacement of the clamping disk outer ring 35 and thus adjustment of the circumferential shape of the press cover 5. It is also possible to manufacture the clamping disk outer ring 35 from a flexible material, for example rubber. This flexible clamping disk outer ring 35 is deformable in the radial direction, whereby the circumferential shape of the press cover can be changed as desired. As a further embodiment, it is also conceivable to form the clamping disk outer ring 35 from several sections that can be moved independently of one another, so that the circumferential shape of the press cover 5 can be adjusted as desired by radial displacement of the individual sections.

Figure 4 shows an embodiment with four centering screws 40, whereby both the connection of the clamping disc inner ring 33 to the clamping disc outer ring 35 via a plurality of clamping screws 34 and the fastening of the conical clamping ring 36 via a plurality of screws 21 to the clamping disc outer ring 35 can be seen.

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The part of a clamping disk 42 shown in Figure 5 comprises a base body 43 rotatably mounted on a cross member (not shown), a clamping ring 44 and a support element 46 connected to the base body 43 via a tension screw 45.

The clamping ring 44 has cavities 47 into which jacket support sleeves 48 inserted into the base body 43 protrude. Clamping screws 50 protrude through openings 49 formed in the clamping ring 44, extend through the jacket support sleeves 48 and are screwed into threaded holes 51 arranged in the base body 43.

The end 6 of the press jacket 5 is guided between the clamping ring 44 and the base body 43, with a plurality of tongues 52 being formed on the radially inwardly bent end 6a of the press jacket 5, which are spaced apart from one another by gaps 53 (see Figure 8). The jacket support sleeves 48 protrude through the gaps 53, with the radially outward-facing edges of the gaps 53 coming to rest on the outside of the jacket support sleeves 48. Centering pieces 54 designed as projections are formed on the radially inner side of the clamping ring 44, which also extend through the gaps 53 and engage in a circumferential groove 55 provided in the base body 43.

Openings 56 are formed in the end region of the tongues 52, through which retaining pins 57 secured in the base body 43 protrude to hold the press jacket ends 6a.

The tension screw 45 extends through a hole provided in the base body 43 and is screwed into a threaded hole 59 provided in the support element 46. At the end of the

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Tension screw 45 is provided with a nut 60 which is secured by a clamping pin 61.

The bore 58 is provided in an area of the base body 43 designed as an annular rib 63 and projects into a corresponding guide recess 63 formed in the support element 46, so that the support element 46 can be axially displaced on the annular rib 62. Buffer elements 64 are provided on the front end of the annular rib 62, which can alternatively or additionally also be attached to the bottom end of the guide recess 63, as indicated in Figure 5.

The radially outer section of the support element 46 has a recess 65 in which a frustoconical segment ring 66, arranged concentrically to the longitudinal axis of the press roller, is arranged with its inner edge 67. The segment ring 66 consists of separate segment ring sections 66 ¹ and has openings 68 in the area of its inner edge 67 into which retaining pins 69 are inserted. The ends of the retaining pins 69 protruding on both sides of the segment ring 66 engage in openings 70, 71 provided in the recess 65 of the support element 46, so that the individual sections 66 ' of the segment ring 66 are fixed to the support element 46. The openings 68 in the segment ring 66 have a larger diameter than the retaining pin 69 inserted into them, so that tilting of the segment ring 66 or the segment ring sections 66' is possible.

The segment ring 66 or the sections 66' of the segment ring 66 are provided with radial longitudinal slots 72 in their radially outwardly directed region, so that an expansion of the segment ring 66 in the radial direction is possible by spreading the radial longitudinal slots 72.

The segment ring 66 rests with its radially inner side 73 on a curved surface section 74 of the section element 46 and with its radially outer edge 75 on the inner side of the press jacket 5.

To improve the sealing of the press jacket interior against the environment, an annular groove 76 is formed on the outer end face of the base body 43, in which a circumferential sealing ring 77 is arranged, which rests over the entire circumference of the radially inwardly bent end 6a of the press jacket 5.

To fasten the press cover 5, the tongues 52 formed on the end 6a of the press cover are first folded radially inwards with the clamping ring 44 loosened and hooked with their openings 56 onto the retaining pins 57. The clamping ring 44 is then placed on the axially outer end face of the base body 43, whereby the clamping ring 44 is automatically centered with respect to the axis of rotation of the press roller 2 by inserting the centering pieces 54 into the circumferential groove 55.

Before the clamping screws 50 are tightened to fix the press jacket end 6a between the clamping ring 44 and the base body 43, the tongues 52 are clamped radially inwards until the radially outer edge of the gaps 53 comes into contact with the jacket support sleeves 48, whereby the press jacket 5 is pre-centered. The screws 50 are then tightened so that the press jacket ends 6a are clamped and fixed between the clamping ring 44 and the base body 43.

For subsequent adjustment of the circumferential shape of the press jacket 5, the tension screw 45 is turned so that the support element

46 slides axially outward on the ring rib 62. Due to this axial displacement of the support element 46, the segment ring 66 or the segment ring sections 66' tilt radially outward, whereby the radial longitudinal slots 72 are widened. Due to the tilting of the segment ring 66 or the segment ring sections 66', the area of the press jacket 5 against which the outer edge 75 rests is pressed radially outward, so that a targeted deformation of the circumference of the press jacket 5 in this area is possible.

If both the segment ring 66 and the support element are divided into a plurality of mutually associated sections 66 ' or sections 46', each of which can be axially displaced via separate tension screws 45, a very variable adjustment of the circumferential shape of the press jacket 5 is possible.

If the segment ring 66 consists of a single, self-contained part, the retaining pins 69 can be omitted, since slipping of the segment ring 66 in the circumferential direction is not possible in this case.

The segment ring 66 or the segment ring sections 66' are made of a material with a low modulus of elasticity, for example polyamide, so that a good transmission of the tilting movement of the segment ring 66 or the segment ring sections 66' to the press jacket 5 is ensured.

When the tension screw 45 is loosened, the compression spring 78 presses the support element 46 away from the base body in the axial direction, whereby the segment ring 66 is tilted radially inward, so that its maximum outer diameter is reduced.

In the embodiment shown in Figure 6, elements known from the embodiments already described are identified by the reference numerals according to Figures 1 to 5.

In the embodiment shown, the retaining pins 57 according to Figure 5 are replaced by eccentric clamping pins 25 according to Figure 2. The clamping pins 25 protrude through the openings 56 provided in the ends 6a of the press cover 5 designed as tongues 52, so that the longitudinal tension of the press cover 5 can be adjusted over its circumference by turning the clamping pins 25.

The press jacket ends 6a, which are bent radially inwards, are fixed by prism-shaped clamping segments 79, of which, for example, six are distributed over the circumference of the base body 43 of the clamping disk. Stop edges 80 are formed on the axially outer end face of the base body 43, against which the radially outer edge of the intermediate spaces 53 comes to rest. Between the stop edges 80, slots 81 extending in the radial direction are formed, through which the tongues 52 of the press jacket end 6a run in the radial direction inwards.

In addition to adjusting the longitudinal tension of the press jacket 5 via the eccentric clamping pins 25, the circumferential shape of the press jacket 5 can be adjusted by the segment ring 66 or the segment ring sections 66', as described in Figure 5. The segment ring 66 comprises a plurality of radial slots 73, the number of which can be approximately between 30 and 100, for example.

In the embodiment shown in Figure 7, a ring-shaped

A ring strip 82 is formed as a small projection and consists of a large number of lugs 82', on which the radially outer edge of the intermediate spaces 53 (Fig. 8) is supported. Radial grooves are formed at regular intervals between the lugs 82' of the ring strip 82, through which the ends of the press jacket 5, formed as tongues 52, extend radially inwards. The clamping ring is formed by a large number of clamping elements 44', each of which can be screwed separately to the front side of the base body 43 using the screws 50 in order to fix the radially inwardly bent ends 6a of the press jacket 5.

In the side view of the embodiment shown in Figure 8 according to Figure 7, in which the clamping elements 44' have been removed, the eccentric clamping pins 25 can be seen, via which the axial longitudinal tension of the press jacket 5 can be adjusted over its circumference.

Furthermore, it can be seen from this figure that the radially outer edge 84 of the gaps 53 either lies snugly against the upper edge of the studs 82' of the ring strip 82, as is the case with the gaps 53 shown in the left half, or that the radially outer edge 84' can be designed to be bulging, which gives it a resilient flexibility. This flexibility ensures that when the eccentric clamping pins 25 are rotated, the press jacket ends designed as tongues 52 can be displaced radially inwards, which on the one hand increases the axial longitudinal tension of the press jacket 5 and on the other hand achieves a radial displacement of the jacket circumference. After achieving the desired longitudinal tension or the desired circumferential shape of the press jacket 5, it can be fixed in the desired position by placing and screwing the clamping elements 44'.

By guiding the tongues 52 in the radial grooves 83, in addition to the radial alignment of the press sleeve ends between the lugs 82' of the ring strip 82, an exact positioning of the press sleeve 5 in the circumferential direction during clamping is also ensured.

S 6378-Dt/Ru List of reference symbols

1 Shoe press 2 Press roller 3 Counter roller 4 Press gap 5 Press jacket 6 Press jacket end 6a radially inward bent end of the press jacket 7 Press jacket end 8th Clamping disc 9 Clamping disc 10 End pin 11 End pin 12 Cross member 13 cylinder 14 Pistons 15 Press shoe 16 End pin 17 End pin 18 carrier 19 carrier 20 Basic body 21 Screws 22 Clamp ring 23 Jacket centering elements 24 Threaded hole 25 Eccentric dowel pin 26 Threaded shaft 27 Longitudinal axis of the threaded shaft 28 Chucking spigot 29 Longitudinal axis of the chucking spigot 30 slot

31 drilling 32 opening 33 Clamping disc inner ring 34 Screws 35 Clamping disc outer ring 36 Cone clamping ring 37 Through hole 38 Threaded hole 39 Threaded hole 40 Centering screw 41 Extension 42 Clamping disc 43 Base body 44 Clamping ring 45 Tension screw 46 Support element 47 cavity 48 Sheath support sleeves 49 openings 50 Clamping screws 51 Threaded holes 52 Tongues 53 Spaces 54 Centering pieces 55 Circumferential groove 56 opening 57 Retaining pins 58 drilling 59 Threaded hole 60 Mother 61 Spring pin 62 Ring rib 63 Guide recess 64 Buffer elements

65 recess

66 Segment ring

67 Inner edge of the segment ring

68 Opening

69 retaining pins

70 openings

71 openings

72 Radial longitudinal slots

73 Radial inside of the segment ring

74 Curved surface section

75 Radial outer edge

76 Ring groove

77 Sealing ring

78 compression spring

79 Prism ring-shaped clamping segment

80 stop edges

81 slots

82 Ring strip 82' studs

83 Radial groove

84 Radial outer edge

Claims (36)

S 6378-Dt/Ru Protection claims 1. Press roll for treating web-shaped material, in particular for dewatering a fibrous web, with a flexible press cover (5), the ends (6, 6a, 7) of which are each fastened to a tensioning disk (8, 9) seated on a cross member (12) via fastening elements (21, 22, 36, 44, 50), wherein the press cover (5) is clamped between the tensioning disks (8, 9), characterized in that at least in the region of a clamping disk (8,9) there are provided adjustment members (25, 35, 40, 66, 66') by means of which the circumferential shape of the press jacket (5) can be adjusted in the radial direction or the axial tension of the press jacket (5) can be adjusted over its circumference. 2. Press roll according to claim 1, characterized in that the adjusting members (25, 35, 40, 46, 66, 66') are formed separately from the fastening elements (21, 22, 36, 44, 50). 3. Press roll according to claim 1 or 2, characterized in that a plurality of adjusting members (25, 35, 40, 46, 66') are provided distributed in the circumferential direction of the press shell (5). » · 1 Y Y Y · "Y » 4. Press roll according to one of the preceding claims, characterized in that the adjusting members (25, 35, 40, 46, 66') are adjustable independently of one another. 5. Press roll according to one of the preceding claims, characterized in that the end region (6, 6a, 7) of the press jacket (5) is in engagement with the adjusting members (25) and the adjusting members (25) are each adjustable in the longitudinal direction of the press jacket ends (6, 6a, 7). 6. Press roll according to one of the preceding claims, characterized in that the adjusting members (25, 35, 40) are designed as holding elements for holding the press jacket ends (6, 6a, 7). 7. Press roll according to one of the preceding claims, characterized in that tongue-shaped extensions (52) are formed on the press casing end (6a), on which the holding elements (25) engage. 8. Press jacket according to one of claims 5 to 7, characterized in that in the end region of the press jacket (5), in particular on the tongue-shaped extensions (52), receiving elements, in particular openings (32) are provided, into which the adjusting members (25), in particular designed as pins, engage. 9. Press jacket according to claim 8, characterized in that the pins (25) are designed as eccentric elements which can be rotated eccentrically to their axis (27) about a substantially parallel axis of rotation (29). 10. Press jacket according to claim 8 or 9, characterized in that the pins (25) are designed as threaded pins which are inserted into threaded bores (24) provided in the clamping disk (8) and can be rotated eccentrically therein. 11. Press jacket according to one of the preceding claims, characterized in that the press jacket end (6a) is designed to run in the direction of the cross member (12) and in particular extends substantially perpendicular to the longitudinal axis of the cross member (12), preferably along the clamping disk (8). 12. Press roll according to one of the preceding claims, characterized in that the adjusting members (25) are formed on the front side of the clamping disk (8) and in particular the axis of rotation (27) of the adjusting members (25) formed as eccentric elements runs essentially parallel to the longitudinal axis of the cross member (12). 13. Press roll according to one of the preceding claims, characterized in that the fastening elements (22, 36, 44) are designed as clamping elements, in particular as a clamping ring or as clamping ring sections, and that the press jacket end (6, 7) is clamped for fastening between the clamping elements (22, 36, 44) and the tensioning disk (8, 9). 14. Press roll according to one of the preceding claims, characterized in that the adjusting members (25, 35, 40, 66, 66') are adjustable from outside the press roll. 15. Press roll according to one of the preceding claims, characterized in that the adjusting members (46, 66, 6G ^l ) are arranged in the interior of the press roll in its end region and comprise pressure elements (66, 66') with which the press jacket (5) can be subjected from the inside with pressure directed essentially radially outwards. 16. Press roll according to claim 15,
characterized in that the pressure elements (66, 66') comprise radially displaceable or tiltable elements which rest against the inside of the press jacket (5) substantially over the entire peripheral area of the latter. 17. Press roll according to claim 15 or 16,
characterized, that the pressure elements (66, 66') are designed as a segment ring (66) having a substantially frustoconical surface, which is arranged within the press roller substantially concentrically, perpendicular to the longitudinal axis of the cross member (12) and in particular has radially extending longitudinal slots (72) in its base region (75) having the largest diameter
having. 18. Press roll according to claim 17,
characterized , that the segment ring (66) rests with its base area (75) on the inside of the press jacket (5) and by
Spreading the longitudinal slots (72) in its base area
(75) is expandable. 19. Press roll according to claim 17 or 18,
characterized, that the segment ring (66) is held by a carrier element (46), in particular on the clamping disk (8, 9), the carrier element (46) is essentially axially displaceable and the segment ring (66) is expandable, in particular by axial displacement of the carrier element (46). 20. Press roll according to claim 19,
characterized , that the carrier member (46) is connected to the clamping disk (8, 9) via tension screws (45) and can be displaced axially, in particular in the direction of the clamping disk (8, 9), via the tension screws (45). 21. Press roll according to claim 19 or 20, characterized in that the carrier member (46) is under spring preload, in particular in the axial direction away from the clamping disk (8, 9). 22. Press roll according to one of claims 17 to 21, characterized in that the segment ring (66) consists of a plurality of separate segment ring sections (66 '). 23. Press roll according to one of claims 19 to 22, characterized in that the carrier member (46) consists of a plurality of carrier member sections (46') which are in particular displaceable independently of one another. 24. Press roll according to claim 23, characterized in that each segment ring section (66') is assigned a carrier element section (46'). 25. Press roll according to one of claims 17 to 24, characterized in that the segment ring (66) consists of flexible material, for example rubber. 26. Press roll according to one of the preceding claims, characterized in that that the clamping disc (9) comprises a radially inner clamping disc inner ring (33) and a radially outer clamping disc outer ring (35) and the clamping disc outer ring (35) can be adjusted radially outwards relative to the clamping disc inner ring (33) by means of the adjusting elements (40). 27. Press roll according to claim 26,
characterized, that the clamping disc inner ring (33) and the clamping disc outer ring (35) are connected to one another via detachable fixing means, in particular via screws (34). 28. Press roll according to claims 26 or 27, characterized in that the clamping disc outer ring (3 5) consists of a plurality of clamping disc outer ring sections. 29. Press roll according to one of claims 26 to 28, characterized in that the clamping disc outer ring (35) consists of flexible material, for example rubber. 30. Press roll according to one of the preceding claims, characterized in that the tension of the press jacket (5) is variably adjustable over its circumference. 31. Press roll according to one of the preceding claims, characterized in that adjusting members (25, 40, 46, 46', 66, 66') are provided in the region of both tensioning disks (8, 9). 32. Press roll according to one of claims 7 to 31, characterized in that support elements (82·) arranged essentially in the circumferential direction and spaced apart from one another are provided at least on one end face of the press roll, that the tongue-shaped extensions (52) formed on the press jacket end (6a) are guided essentially radially inwards between the support elements (82') and that in each case the outer edge (84, 84') of the press jacket lying between two adjacent tongue-shaped extensions (52) rests on the radially outer side of a support element (82'). 33. Press roll according to claim 32,
characterized in that the distance (53) between the support elements (82') corresponds substantially to the width of the tongue-shaped extensions (52). 34. Press roll according to claim 32 or 33, characterized in that the support elements (82') are designed as substantially axially outwardly projecting studs which are separated from one another by radial grooves (53). 35. Shoe press for treating web-shaped material, in particular for dewatering a fibrous web, with a press roll and a press nip formed with the press roll (4) forming a counter body, in particular a counter roller characterized , that the press roller is designed according to one of the preceding claims. 36. Shoe press according to claim 35, characterized in that that the counter roller (3) is rotatable.