FI57653B - VALSVERK - Google Patents

Description

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Patent- och ragistantyralMn Ansöksn utltgd och utUkrlfun publleertd 30.05.00 (32) (33) (31) pietty privilege -Begird priorltet 0 8.02.7 3

Switzerland-Switzerland (CH) 179 * + / 73 (71) Escher Wyss Aktiengesellschaft, Zurich, Switzerland-Switzerland (CH) (72) Mario Biondetti, Schio, Italy-Italy (lT) (7 * +) 0y Kolster Ah (5) * +) Rolling mill - Rolling mill

The invention relates, for example, to a rolling mill for a paper machine comprising at least two rolls »at least one of which has an axial support surrounded by a rotatable roll shell mounted on the support by at least one movable support element, the cover being substantially in the plane, the radii are fully movable, and the rollers are connected to each other at each end by a support.

In rolls for pressure treatment of webs of material with a fixed axial support inside the roll, surrounded by a rotating jacket, it is known to fit hydraulic cylinders to the support, the pistons of which support the surrounding jacket and slide along its inner surface.

The known Simos are equipped with more or less complex and costly pressing devices, e.g. hydraulic adjusting devices, the function of which is to move the rollers apart and back against each other and to produce a pressing force between the rollers. Compression equipment is expensive and requires a relatively large amount of space.

2 57653

The object of the invention is to further develop a known rolling mill and to provide a rolling mill which is substantially simpler than hitherto known rolling mills and has various advantages over them, such as a higher load capacity at a more uniform pressure between the rolls, etc.

The rolling mill according to the invention, with which this object is achieved, is characterized in that the supports are distributed between the roller bearings or the roller supports, and that these parts are rigidly connected to each other by means of detachable connecting members.

These measures can omit the otherwise required roll pressing equipment and moving supports in such rolling mills, e.g. paper machines. A very simple structure of the supports also becomes possible, the support elements still allowing an even distribution of the compressive force over the length of the rollers, especially in the case of said hydrostatic support elements.

When the connecting members according to a very preferred embodiment of the rolling mill according to the invention are prestressed with a prestressing force which is greater than the maximum compressive force in use between the rollers. prevent the support parts from becoming detached under all operating conditions. Suitably, the connecting members are formed as pivoting members suitable for transmitting the compressive force of the rollers. The turning members are easily removable, so that simple means allow the rollers to be opened laterally, which may be necessary, for example, when inserting a paper web, wire, or felt between the rollers.

In a preferred embodiment, the fastening members are screws pivotally connected at one end to said support part. This provides a connection that can be removed and attached particularly easily.

In a rolling mill equipped with two rollers, one of which is mounted on top of the other, the support parts can rest on each other along a horizontal separation plane. Thus, the assembly of both support parts, as well as the removal of the second roll, is considerably facilitated, since both support parts can be placed on the coatings before they are screwed together.

In one such embodiment of the rolling mill, it is possible to mount the lower support part fixedly with the lower roll support part and to form the upper support part together with the upper roll support part so that it can be raised relative to the lower part. However, in certain cases, an embodiment may also be advantageous in which the upper support part is fixed to the upper roll support part and in which the lower support part together with the lower roll support part can be lowered with respect to the upper roll.

If interchangeable spacers are in each case installed between the support parts, it is possible to adapt the rolling mill to the different thicknesses of the material to be treated without the radial movement of the support elements having to be disproportionately large.

The invention will be explained with reference to the exemplary embodiments shown in the drawings.

It presents:

Figure 1 is a partially sectioned view of a first embodiment of a rolling mill according to the invention,

Fig. 2 is a section along the line II-II in Fig. 1,

Fig. 3 is a section along the line III-III in Fig. 1,

Fig. U is a view corresponding to Fig. 1 for explaining the upper roll lifting procedure, and

Fig. 5 is a view corresponding to Fig. K of another embodiment of a rolling mill in which the upper roll is fixedly mounted and in which the lower roll can be lowered relative thereto.

Figure 1 shows a rolling mill with an upper roll 1 and a lower roll 2. The upper roll is a full roll which is rotatably mounted on support parts U formed as bearings, which in turn are arranged on the upper support pieces 5 of the supports 6. The lower roll 2 comprises a support 7 on which a sheath 8 is rotatably mounted.

The jacket 6 is supported by hydrostatic piston-like support elements 10 mounted in the cylinder bores 11 in the support 7. In order for the jacket 0 to slide freely along the support elements 10, their support surfaces have hydrostatic lubricated housings. The support elements 10 are movable with respect to the support part U in a plane passing substantially through the axes of each roll 1, 2. The cylinders 11 are connected by a line 12 to a hydraulic fluid tank (not shown).

The casing 3 can be pressed by the hydraulic pressure of the support elements 10 against the upper roll 1, the support elements 10 having the property that their compressive force remains constant over the entire length of the rollers 1, 2 and that it is not affected by the bending of the support 7.

The ends of the support 7 are supported on the lower support pieces 13 of the supports 6, whereby they are fixed against rotation by means not shown. The ends of the support 7 are then provided with spherical or cylindrical bearing shells 1 + +, which allow the ends of the support 7 to bend and the resulting angular movement with respect to the support piece 13 or the support 6.

The jacket 8 is provided at both ends with guide devices, which may be formed in different ways and which allow the jacket 8 to move relative to the support 7 in a plane passing substantially through the axes of both rolls 1, 2.

According to Figures 1 and 2, the guide device comprises a flange-like fastening ring 15 fixed to the other end surface of the jacket 8. The mounting ring 15753 is rotatably mounted on a guide plate 16 having an elongate hole 17 provided with two parallel guide surfaces 18. The support 7 is provided at the guide device with side alignments 20 by means of which it guides the guide plate 16.

According to Fig. 1, the roll 1 has a shaft pin 21 at the right end, which can be used e.g. for rotating the upper roll with a drive device (not shown). Mounted between the two support pieces 5 and 13 of the supports 6 are spacer plates 22, which are used to adjust the distance between the axes of each roll 1 and 2.

As shown in Fig. 3, the support pieces 5 and 13 of each support 6 are connected to each other by pivotable connecting members having screws 23 with nuts 2k. The lower ends of the screws 23 have holes 25 through which pins 26 are inserted, which are fixed to the lower support piece 13.

In use, both support pieces 5 and 13, together with the spacer plate 22, are firmly screwed to each other by screws 23, and in addition with a prestressing force greater than the maximum compressive force in use between the rollers 1 and 2. In this way, the parts 5 »13 and 22 together form rigid supports 6. The compression force between the rollers 1 and 2 is generated only by hydrostatic support elements 10 and the compression force depends on the pressure applied to them.

When it is necessary in the rolling mill according to Figures 1-3 to open laterally, e.g. to insert a paper web, a wire needed for papermaking or a felt, it is sufficient to remove the nuts 2k of the screws 23 with a few turns and turn the screws to the side. The upper roller 1 can then be lifted by a simple means (not shown), e.g. a pulley. According to Fig. U, the support arm 27 makes it possible to simplify this procedure, because it is sufficient to lift the roller 1 away from only one end, the other end resting on the support arm 27. It is also possible to lift the roller 1 in Fig. U with pressure acting on the right end of the shaft pin 21. For this purpose, the shaft pin 21 can be formed longer, as illustrated by the shaft pin 21 'shown in broken line in Fig. U.

Figure 5 shows a possible further embodiment of a rolling mill. In this embodiment, the upper support members 5 'are attached to the schematically shown support structure 30. The lower support members 13 * »which may be connected to the support members 5' in the manner shown in Figure 3 or similar thereto and together form both supports 6 'may be lowered by the support members 5'. ' regarding. Lowering or lifting can take place with a lifting device 31. The same lifting device can also be used at one end of the roll 2. It is also possible, analogously to Fig. U, to hang the right end of the roll 2 on the upper support piece 5 ', e.g. with a rope 32, or on a support structure 30, so that the roll 2 only needs to be lowered or raised at one end to open the rolling mill.

5 57653

It will be appreciated that the invention may similarly be used in multi-roll rolling mills or rolling mills where the roll arrangement differs from that vertically superimposed. It is also possible to equip the upper roll or both rolls with a fixed support and a rotating jacket and support elements instead of a lower roll.

Claims (8)

57653 6 P atent t i view im et A rolling mill for a paper machine, for example comprising at least two rolls, at least one of which has an axial support surrounded by a rotatable roll shell mounted on the support by at least one movable support element, the shell being substantially in a plane passing through the axis of each roll. , radially movable and the rollers are each connected at their ends by a support, characterized in that the supports (6, 6 ') are divided between the roller bearings or the roller supports and that these parts (5 * 13 »5', 13 ') are rigidly connected by means of detachable connectors (23 »2¾). Rolling mill according to Claim 1, characterized in that the connecting elements (23, 2b) are prestressed with a prestressing force which is greater than the maximum compressive force in use between the rollers (1, 2). Rolling mill according to Claim 1 or 2, characterized in that the connecting elements (23, 2¾) are formed as turning elements. Rolling mill according to Claim 3, characterized in that the connecting elements (23, 2b) comprise screws (23) which are connected at one end to a pivotable support part (5, 13). Rolling mill according to one of Claims 1 to 3, characterized in that in a rolling mill provided with rollers, one of which is mounted on top of the other, the support parts (5, 13; 5 ', 13') abut one another along a horizontal separation plane. Rolling mill according to Claim 5, characterized in that the lower support part (13) is fixed to the support part (1¾) of the lower roll (2) and that the upper support part (5) can be raised with respect to the support part (yhdessä) of the upper roll (1). . Rolling mill according to Claim 5, characterized in that the upper support part (5 ') is fixed to the support part of the upper roll (2) and that, on the contrary, the lower support part (13') can be lowered relative to the lower roll support part (Fig. 5). Rolling mill according to one of Claims 1 to 7, characterized in that interchangeable spacers (22) are in each case mounted between the support parts (5, 13; 5 ', 13').