DE202005022052U1 - Spreader roll - Google Patents

Abstract

Roller (10), in particular spreader roller, for a web processing machine, with a support core (16) supported in the area of its two ends via a respective bearing (14) and an outer jacket (18) which in its axially central area (20) relative to the Support core (16) is mounted in a radially immovable manner and in the area of its two ends is supported in a radially adjustable manner relative to the support core (16) via a respective further bearing (22), the center plane (26 or 28) extending in the radial direction and the support core mounting (14 ) and the outer jacket bearing (22) is located axially within the outer jacket (18).

Description

The invention relates to a roller, in particular spreader roller, for a web-processing machine.

Spreader rolls are used in web-processing machines in order to avoid wrinkling or sagging due to spreading of the material web while the material web is running. Furthermore, spreader rolls are used to guide side by side juxtaposed material webs apart. Parallel juxtaposed material webs can be generated for example by longitudinal cutting a wide web.

Breitstreckenwalzen of the type mentioned are, for example, in the DE 199 27 897 A1 and DE 10 2004 045 407 A1 described.

Although the most recent designs of spreader rolls based on high-performance plastics have optimized curvatures. However, they have the disadvantage that the constructions in question are not stored torque-free, d. H. the stiction of the machine in question, for example paper machine, is undesirably loaded. For new systems, the occurring moments must be taken into account, which requires costly reinforcements. For existing systems even more complex auxiliary structures are required.

The invention has for its object to provide an improved roll, in particular improved bending roll, of the type mentioned, in which the aforementioned problems are eliminated. In particular, the moments initiated in the staging should be reduced to a minimum.

This object is achieved according to the invention by a roller, in particular spreader roller, for a web-processing machine, with a supported in the region of its two ends via a respective support core and an outer shell which is mounted radially immovably in its axially central region relative to the support core and in the Area of its two ends is supported radially adjustable relative to the support core via a respective further storage, wherein the radially extending center plane of both the support core storage and the outer casing storage is axially within the outer shell. In this case, the outer sheath is preferably adjustable in the region of its two ends by an actuator arranged within the outer sheath.

Due to this design, the torque introduced into the stool is reduced to a minimum, and in the optimal case it can even be brought to zero. By also the actuator is disposed within the outer shell, resulting in a compact adjustment, which makes it possible to reduce the forces for the adjustment and to control the forces occurring.

The actuator is advantageously arranged radially between the support core bearing and the outer jacket bearing.

In a preferred practical embodiment of the roller according to the invention, the actuator is supported on the stool.

Advantageously, the actuator comprises at least one eccentric, wherein preferably two mutually supported eccentrics are provided.

Conveniently, the two eccentrics are jointly and / or separately adjustable.

With such an eccentric arrangement, the position of the curvature height or the extent of the curvature and / or the position of the curvature plane can each be set separately or jointly or simultaneously.

With respect to a possible moment-free storage, it is advantageous if the respectively extending in the radial direction middle planes of the support core bearing and the outer shell storage at least substantially coincide. Advantageously, therefore, an aligned or symmetrical arrangement of the support core bearing and the outer shell bearing is provided.

A preferred practical embodiment of the roller according to the invention is characterized in that the support core bearing and the outer jacket storage each comprise only one bearing and that the support core bearing and the outer shell bearing are arranged at least substantially in a common radial plane.

Advantageously, the support core bearing and / or the outer jacket storage can also each comprise two or more bearings.

If the outer casing bearing comprises two or more bearings, the center plane of this outer casing bearing extending in the radial direction expediently coincides at least substantially with the center plane of the supporting core bearing extending in the radial direction. If the support core bearing is formed only by a bearing, then this support core bearing is preferably arranged at least substantially in the radially extending center plane of the outer jacket bearing.

In principle, however, the support core bearing may include two or more bearings. In this case, the bearings of the outer casing storage and the bearings of the support core bearing are advantageously arranged symmetrically with respect to a radial plane common to the two bearings.

If the support core bearing comprises two or more bearings, the center plane of this support core bearing extending in the radial direction expediently coincides at least substantially with the center plane of the outer jacket bearing extending in the radial direction.

In this case, if the outer casing bearing comprises only one bearing, then this outer casing bearing is advantageously arranged at least substantially in the center plane of the supporting core bearing extending in the radial direction.

If the outer casing bearing also comprises two or more bearings, then the bearings of the support core bearing and the bearings of the outer casing bearing are advantageously again arranged symmetrically with respect to a radial plane common to the two bearings.

The corresponding arrangement of the bearings and / or the actuator results in a very rigid structure, which is particularly insensitive to vibrations. Nevertheless occurring vibrations can be at least reduced by suitable damping elements. Thus, in a preferred practical embodiment, damping means are provided between the support core bearing and the outer jacket bearing. In this case, a viscous liquid is preferably introduced into the cavity between the support core bearing and outer jacket bearing.

It is also conceivable, for example, to provide a membrane in the area between the support core bearing and the outer jacket bearing.

Alternatively or additionally, it is advantageous if the roller is fastened to the chair via vibration-damping elements. Alternatively or additionally, it may in particular also be attached to the stool via actively damping hydraulic elements.

Due to the small installation space, it may be necessary to use small bearings and preferably bearings, which combine the bearing function and an angle-compensating function in itself. The support core bearing and / or the outer jacket bearing preferably each comprise at least one angle-compensating bearing.

Particularly in the case of larger forces, the support core bearing and / or the outer jacket bearing advantageously comprise in particular at least one conical, cylindrical or barrel roller bearing, which, since these do not permit angular adjustment, must be supported in such a manner that an angular adjustability of the outer jacket axis and / or support core axis is ensured.

In a preferred practical embodiment of the roller according to the invention, the support core is rotatable together with the outer jacket. In this case, the outer jacket is preferably connected rotationally fixed to the support core.

In principle, however, such embodiments are conceivable, for example, in which the support core is not rotatable about its longitudinal axis and the outer shell is rotatably mounted about its longitudinal axis relative to the support core.

It is also particularly advantageous if, viewed in the axial direction, the support core has an at least sectionally different cross-sectional shape. In this case, the support core may have, in particular at least in sections, a cross-sectional shape tapering conically towards its ends.

In the case of the roller according to the invention, the force flow which is caused by the corresponding structure and the loads occurring is thus transmitted as directly as possible and without auxiliary structures between the two bearings.

The invention will be described in more detail below by means of embodiments with reference to the drawing; in this show:

1 a schematic longitudinal sectional view of a spreader roller with associated stiffening,

2 a schematic cross-sectional view of a double eccentric comprehensive actuator in the zero position,

3 a schematic cross-sectional view of a double eccentric comprehensive actuator in a maximum deflection effecting setting,

4 a schematic cross-sectional view of a roll end with associated support core bearing, outer shell bearing and actuator and with an actuator associated with the worm gear,

5 a partially sectioned schematic side view of the roll end according to 4 .

6 a simplified schematic cross-sectional view of a roller end with associated actuator compared to the outer shell position in the region of the web center at different settings of the actuator,

7 a schematic longitudinal sectional view of a roll end of the roller according to 1 wherein the support core bearing and the outer jacket bearing each comprise only one bearing,

8th one with the 7 comparable representation, but wherein the support core bearing comprises two bearings, and

9 one with the 7 comparable representation, but wherein the outer shell storage comprises two bearings.

1 shows a schematic longitudinal sectional view of a spreader roller 10 with assigned stasis 12 , This spreader roll 10 is in particular in a web-processing machine, in particular paper machine, used.

As based on the 1 can be seen comprises the spreader roller 10 one in the region of its two ends via a respective storage 14 supported support core 16 and an outer jacket 18 ,

The outer jacket 18 is in its axially middle area 20 relative to the support core 16 mounted radially immovable and in the region of its two ends via a respective further storage 22 relative to the support core 16 radially adjustable supported.

Again 1 can be taken, is located in the radial direction extending center plane 26 respectively. 28 both the support core storage 14 as well as the outer shell storage 22 axially within the outer jacket.

In the area of its two ends is the outer jacket 18 each by one within the outer shell 18 arranged actuator 30 adjustable, the radial between support core bearing 14 and outer sheath storage 22 is arranged. This actuator 30 is at the stasis 12 supported and by means of a later to be described in more detail swivel, in particular worm gear 32 variably adjustable.

In 1 is also one on the spreader roll 10 guided material web 34 to recognize, which may be, for example, a paper, board or tissue web.

This material web 34 brings about the corresponding train a constant load 36 with it, only to a small extent in the strangulation 12 initiated tilting moment leads.

The actuator 30 includes two eccentrics mounted one inside the other, which can be adjustable together or separately.

In the illustrated state, the spreader roller is bent. For this purpose, the supporting core is displaced by the actuator comprising the two eccentrics. The force for lifting the support core is introduced in the inner eccentric. The outer jacket is curved with the force and is supported on the outer jacket bearings. Since these lie in one plane, no moment arises. Prerequisite for this are swiveling bearings.

If the spreader roll assume its non-bent neutral position, then the actuator is to be adjusted so that the eccentricity of the inner eccentric is offset by 180 ° with respect to the eccentricity of the outer eccentric.

As bearings bearings, etc. are provided in the present case, for example, spherical roller bearings. As based on the 1 it can be seen, it is at the left end of the roll provided outer shroud bearing a floating bearing and at the right end of the roll provided outer sheath storage to a fixed bearing. The support tube bearings are each formed by a floating bearing.

2 shows a schematic cross-sectional view of the two eccentrics 30 ' . 30 '' comprehensive actuator 30 in a zero position, in which the maximum eccentricity of the inner eccentric 30 ' with the minimum eccentricity of the outer eccentric 30 '' coincides. The axis 38 the circular cylindrical interface 40 between the two eccentrics 30 ' . 30 '' So here is an amount "e" to the axis 42 the support core bearing 14 shifted upwards, which also causes a corresponding positioning of the outer jacket storage 22 and thus the respective roll shell end results.

3 shows one with the 2 comparable representation, in the present case, the two eccentrics 30 ' . 30 '' comprehensive actuator 30 However, adjusted so that there is a maximum deflection. This fall the extremities of the two eccentrics 30 ' . 30 '' together. Accordingly, here is the axis 38 the circular cylindrical interface 40 between the two eccentrics 30 ' . 30 '' opposite the axis 42 the support core bearing 14 shifted by the amount "2e", for example, to the left, causing again a corresponding displacement of the outer jacket storage 22 and thus the respective roll shell end results.

The extremities of the two eccentrics 30 ' . 30 '' are the same size.

4 shows a schematic cross-sectional view of a roll end with associated support core storage 14 , Outer jacket storage 22 , Actuator 30 and a double pivot mechanism (see also 5 ) to adjust the two eccentricities 30 ' . 30 '' of the actuator 30 ,

In view of the small available installation space, in particular small bearings are used, preferably bearings, for example self-aligning bearings, which combine the bearing function and the angle-compensating function in one. Furthermore, conical, cylindrical or spherical roller bearings (even several) are conceivable.

5 shows the roll end in a partially sectioned schematic side view.

Like that 4 and 5 can be taken, are the two eccentrics 30 ' . 30 '' each via an eccentric shaft 44 ' . 44 '' with a worm gear 46 ' . 46 '' connected to a respective worm shaft 48 ' . 48 '' is assigned, over which the two eccentrics 30 ' . 30 '' are rotatable together or separately.

How best by the 4 can be seen, done by turning the eccentric 30 ' . 30 '' a corresponding adjustment of eccentricity and position of the respective roll end.

6 shows in simplified schematic cross-sectional view of a roller end with associated actuator 30 compared to the outer sheath position in the area of the middle of the track at different settings of the actuator 30 ,

In this 6 is the neutral line of the outer mantle 18 denoted by "50". In addition, in the various sections a) to d) in addition to the two eccentrics 30 ' . 30 '' of the actuator 30 the support core 16 as well as the outer jacket 18 to recognize, with with 18 ' the position of the outer jacket 18 at a respective roll end and with 18 '' the position of the outer jacket 18 is shown in the middle of the track.

According to 6a) are the two eccentrics 30 ' . 30 '' adjusted so that the maximum curvature of the outer shell 18 pointing down and the outer jacket 18 is offset upwards in the region of the two roll ends.

According to the 6b) are the two eccentrics 30 ' . 30 '' adjusted so that the maximum curvature of the outer shell 18 facing up and the outer jacket 18 offset at the roll ends down.

According to 6c) are the two eccentrics 30 ' . 30 '' adjusted so that no casing curvature occurs and the outer casing is offset downwards.

According to 6d) are the two eccentrics 30 ' . 30 '' adjusted so that there is no curvature of the casing and the outer casing 18 is offset upwards.

In the two in the 6c and 6d mentioned cases is the outer jacket 18 without curvature relative to the support core 16 aslant. As a result, with the spreader roller and a control function can be realized.

Of course, it is also conceivable that the outer sheath 18 simultaneously relative to the support core 16 is curved and oblique to the support core 16 stands.

7 shows a schematic longitudinal section of an end of the spreader roller 10 according to 1 ,

This includes the Stützkernlagerung 14 and the outer jacket storage 22 only one warehouse each. In this case, the support core bearing and the outer shell bearing are arranged in a common radial plane. The outer shell bearing is larger in the present embodiment than the support core bearing. In the process, the center planes extending in the radial direction fall in each case 26 respectively. 28 the support core bearing 14 and the outer jacket storage 22 together. In this 7 are again the outer jacket 18 , the supporting core 16 as well as the actuator 30 to recognize.

In some designs of bearings, it may be conceivable that the normally stronger outer tube bearing is brought by smaller rollers, etc. to the approximately same carrying capacity as that of the inner tube bearing. Thus, at low curvature both bearings have an approximately equal minimum load whereby a roll of inner and outer tube bearing is given, d. H. a bearing destroying sliding of the rolling elements is reduced or largely prevented.

This results in a favorable arrangement, since a direct support leads to a reduction of the load on the intermediate sleeves or eccentrics and allows a very rigid low-vibration design.

This arrangement can only be realized if the resulting due to the roll diameter and the outer sheath bearing size outer diameter of the support core bearing is still possible for bearings with corresponding load ratings.

8th shows one with the 7 comparable representation, wherein in the present case the Stützkernlagerung 14 however, two axially spaced bearings 14 ' . 14 '' includes. The outer shell storage 22 is again formed here only by a camp.

While the right camp 14 '' the support core bearing 14 inside the outer jacket 18 is arranged, is the left bearing 14 ' outside of this outer mantle 18 , The middle level 26 this support core storage 14 however, is still clearly within the outer shell 18 , The bearing of the outer sheath storage 22 is again larger in size than the bearings 14 ' . 14 '' the support core bearing 14 ,

As based on the 8th it can be seen, falls in the radial direction extending center plane 26 the support core bearing 14 with the radially extending center plane 28 the outer jacket storage 22 together.

Again, the two eccentrics 30 ' . 30 '' comprehensive akutator again radially between the two bearings 14 ' . 14 '' comprehensive support core storage 14 and the outer jacket storage 22 arranged.

When using bearings of different sizes, the axial distances x and y may differ to achieve a load distribution in relation to the load capacity of the bearings.

In an inclined position of the roller is to allow for a torque freedom, a corresponding inclination of the bearings. This can be done either directly by selecting an angularly adjustable bearing or, as required for example in a double arrangement, by an area in the force introduction plane, which leaves an inclined position, as is the case for example with a spherical surface.

The in the 8th illustrated arrangement of the outer jacket bearing 22 can also be realized by two or more warehouses. Similarly, the number of core support is not limited to two camps. The direct support and adjustment of the example shown Doppelexzenterlagerung must be done by using two or more bearings per axis of rotation by appropriately vigorously designed bearing housing internally redirect the force to two or more bearings and are therefore burdened by an internal moment.

9 shows one with the 7 comparable representation, but in the present case, the outer jacket storage 22 two camps 22 ' . 22 '' includes.

Camps 22 ' . 22 '' the outer jacket storage 22 are dimensioned larger in the present case than the support core storage again formed only by a bearing 14 ,

In the present case, both the Stützkernlagerung 14 as well as the outer shell storage 22 each completely within the outer shell 18 ,

As already mentioned, the support core bearing comprises 14 in the present case, only one warehouse. As based on the 9 As can be seen, this support core bearing is in the radially extending mid-plane 28 the outer jacket storage 22 arranged. Here, too, falls again in the radial direction extending center plane 28 the outer jacket storage 22 with the radially extending center plane 26 the support core bearing 14 together.

In principle, such embodiments are conceivable in which both the Stützkernlagerung 16 as well as the outer shell storage 22 each composed of two or more bearings. Such designs, each with two or more bearings are used to achieve a higher overall bearing load capacity, and / or they are used in the case that the radially available space for an arrangement of radially nested bearings is not sufficient.

The support core 16 can work together with the outer jacket 18 be rotatable. In this case, the outer sheath 18 with the support core 16 rotatably connected. In principle, however, such designs are conceivable in which the support core 18 is not rotatable about its longitudinal axis.

As based on the 1 can be seen, the support core 16 Viewed in the axial direction have an at least partially different cross-sectional shape. In the present case, this support core has 16 at least in sections, a conically tapered to its ends cross-sectional shape.

LIST OF REFERENCE NUMBERS

10

Spreader roll

12

framing

14

Support core bearing

14 '

camp

14 ''

camp

16

supporting core

18

outer sheath

20

middle area

22

Outer covering bearing

26

Center plane of the support core bearing

28

Center plane of the outer casing storage

30

actuator

30 '

eccentric

30 ''

eccentric

32

Swing gear, worm gear

34

web

36

Uniformly Distributed load

38

axis

40

circular cylindrical interface

42

Axle of the support core bearing

44 '

eccentric shaft

44 ''

eccentric shaft

46 '

worm gear

46 ''

worm gear

48 '

worm shaft

48 ''

worm shaft

50

Neutral line of the outer jacket

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19927897 A1 [0003]
• DE 102004045407 A1 [0003]

Claims (32)

Roller ( 10 ), in particular spreader roll, for a web-processing machine, with one in the region of its two ends via a respective bearing ( 14 ) supported core ( 16 ) and an outer jacket ( 18 ), which in its axially central region ( 20 ) relative to the support core ( 16 ) mounted radially immovably and in the region of its two ends via a respective further storage ( 22 ) relative to the support core ( 16 ) is supported radially adjustable, wherein the radially extending center plane ( 26 respectively. 28 ) both the core support ( 14 ) as well as the outer jacket storage ( 22 ) axially within the outer shell ( 18 ) lies. Roller according to claim 1, characterized in that the outer jacket ( 18 ) in the region of its two ends in each case by a within the outer shell ( 18 ) arranged actuator ( 30 ) is adjustable. Roller according to claim 2, characterized in that the actuator ( 30 ) radially between support core bearings ( 14 ) and outer jacket storage ( 22 ) is arranged. Roller according to claim 2 or 3, characterized in that the actuator ( 30 ) on a chair ( 12 ) is supported. Roller according to one of the preceding claims, characterized in that the actuator ( 30 ) at least one eccentric ( 30 ' . 30 '' ). Roller according to claim 5, characterized in that the actuator ( 30 ) two eccentrics ( 30 ' . 30 '' ). Roller according to claim 6, characterized in that the two eccentrics ( 30 ' . 30 '' ) are jointly and / or separately adjustable. Roller according to one of the preceding claims, characterized in that the middle planes extending in each case in the radial direction ( 26 respectively. 28 ) of the core support ( 14 ) and the outer jacket storage ( 22 ) at least substantially coincide. Roller according to one of the preceding claims, characterized in that the support core bearing ( 14 ) and the outer jacket storage ( 22 ) each comprise only one bearing and that the support core bearing ( 14 ) and the outer sleeve bearing ( 22 ) are arranged at least substantially in a common radial plane. Roller according to one of claims 1 to 8, characterized in that the support core bearing ( 14 ) and / or the outer jacket storage ( 22 ) each comprise two or more bearings. Roller according to claim 10, characterized in that the outer jacket bearing ( 22 ) two or more bearings ( 22 ' . 22 '' ) and that the radially extending mid-plane (FIG. 28 ) of this outer jacket storage ( 22 ) with the radially extending middle plane ( 26 ) of the core support ( 14 ) at least substantially coincide. Roller according to claim 11, characterized in that the support core bearing ( 14 ) comprises only one bearing and that this support core bearing at least substantially in the radially extending mid-plane ( 28 ) of the outer jacket storage ( 22 ) is arranged. Roller according to claim 11, characterized in that the support core bearing ( 14 ) comprises two or more bearings. Roller according to claim 13, characterized in that the bearings of the outer casing storage ( 22 ) and the bearings of the support core bearing ( 14 ) with respect to one of the two bearings ( 22 . 14 ) common radial plane are each arranged symmetrically. Roller according to claim 10, characterized in that the support core bearing ( 14 ) two or more bearings ( 14 ' . 14 '' ) and that the radially extending mid-plane (FIG. 26 ) this support core bearing ( 14 ) with the radially extending middle plane ( 28 ) of the outer jacket storage ( 22 ) at least substantially coincide. Roller according to claim 15, characterized in that the outer jacket bearing ( 22 ) comprises only one bearing and that this outer sleeve bearing at least substantially in the radially extending mid-plane ( 26 ) of the core support ( 14 ) is arranged. Roller according to claim 15, characterized in that also the outer jacket bearing ( 22 ) comprises two or more bearings. Roller according to claim 17, characterized in that the bearings of the support core bearing ( 14 ) and the bearings of the outer casing storage ( 22 ) are each arranged symmetrically with respect to a radial plane common to the two bearings. Roller according to one of the preceding claims, characterized in that between support core bearing ( 14 ) and outer jacket storage ( 22 ) Damping means are provided. Roller according to claim 19, characterized in that in the cavity between support core bearing ( 14 ) and outer jacket storage ( 22 ) a viscous liquid is introduced. Roller according to claim 19 or 20, characterized in that in the region between the support core bearing ( 14 ) and outer jacket storage ( 22 ) A membrane is provided. Roller according to one of the preceding claims, characterized in that it has vibration damping elements on the frame ( 12 ) is attachable. Roller according to one of the preceding claims, characterized in that it has active damping hydraulic elements on the frame ( 12 ) is attachable. Roller according to one of the preceding claims, characterized in that the support core bearing ( 14 ) and / or the outer jacket storage ( 22 ) each comprise at least one angularly compensating bearing. Roller according to one of the preceding claims, characterized in that the support core bearing ( 14 ) and / or the outer jacket storage ( 22 ) each comprise at least one self-aligning bearing. Roller according to one of the preceding claims, characterized in that the support core bearing ( 14 ) and / or the outer jacket storage ( 22 ) each comprise at least one conical, cylindrical or barrel roller bearing. Roller according to one of the preceding claims, characterized in that the support core ( 16 ) via the support core bearing ( 14 ) is rotatably mounted about its longitudinal axis. Roller according to claim 27, characterized in that the support core ( 16 ) together with the outer jacket ( 18 ) is rotatable. Roller according to Claim 27, characterized in that the outer jacket ( 18 ) with the support core ( 16 ) is rotatably connected. Roller according to one of claims 1 to 26, characterized in that the support core ( 16 ) is not rotatable about its longitudinal axis. Roller according to one of the preceding claims, characterized in that the support core ( 16 ) viewed in the axial direction has an at least partially different cross-sectional shape. Roller according to claim 31, characterized in that the support core ( 16 ) has, at least in sections, a cross-sectional shape tapering conically towards its ends.

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