AT504422B1 - PIVOTING OF A PASSENGER, CARDBOARD OR EQUIPMENT BENDING ROLLER - Google Patents

Abstract

The invention relates to a hinge bearing for a deflection adjustment of a paper, board or equipment machine. The roller has a rotationally fixed yoke extending axially through the roller, and the ends (4) of this yoke protrude from the roller and are inserted into bearing blocks (1). The hinge bearing is designed so that rotation of the roller in the bearing is prevented transversely to the plane of the nip force (F).

Description

Austrian Patent Office AT 504 422 B1 2010-09-15

Description: The present invention relates to a hinge bearing for a deflection roll of a paper, board or finishing machine, which roll has a rotationally fixed yoke extending axially through the roll, the ends of which project from the roll and into bearing blocks are used.

The present invention is particularly to be used in paper or board machines in different positions, such as in the press section or in calender zone-controlled deflection adjustment with a non-rotatable yoke, which is attached to the frame of the machine via bearing blocks with spherical bearings, and with a jacket rotatably mounted on the yoke, the position of which is invariable with respect to the yoke. On the yoke hydraulic support elements are arranged, distributed on zones, each comprising one or more support elements. The nip force is passed through the jacket on the support elements and further over the yoke on the stiffening. The nip force distribution can be varied by acting on the support elements of the individual zone oil pressure. The deflection adjusting roller of this type is used together with a mating roll to form a nip whose loading is effected, for example, by loading the mating roll with separate hydraulic cylinders against said deflection roll or, for example, by lifting the deflection roll from its journals against the backing roll. The transfer of the nip force on the yoke of the roller leads to a bending of the yoke and thus to a tendency of the yoke ends, which is compensated by the hinge bearing located in the bearing block. The hinge bearing also allows for example caused by thermal expansion axial movement of the yoke.

EP 1 239 170 A1 describes a selbstanstellende deflection adjustment roller with a rotating roll shell, the roll shell axially penetrating, end rotatably held in frames yoke and at least one yoke arranged on the inside of the roll shell in a press plane supporting force exerting support element.

DE 101 17 718 A1 deals with an arrangement for applying a deflection-compensated roller or other elongated element in a paper / board or finishing machine.

DE 28 25 706 A1 shows a device for determining the compressive forces, which act in a rolling apparatus with at least one deflection adjustment roller and with at least one counter-roller.

The natural frequency of the free roller is mainly determined by the stiffness, the mass and the supporting stiffness of the yoke. Because of the nip loads, the roller yoke is typically stiffer in the direction of the nip plane than transverse to that direction. The support of the roller to the stool is typically a looser one in the machine direction. One of the problems encountered is that the natural frequency and shape of the machine direction roll in high-speed machines, such as the OptiLoad calender, in open-nip operation fall within the running speed range of the machine.

This invention is based on the object to provide a solution with which increased in a relatively simple manner, the rigidity of Jochabstützung in the direction of the nip force transverse direction and thus the natural frequency can be shifted above the operating range, and this solution provides reliable and advantageous joint storage.

This object is achieved by the joint bearing according to the invention, the characteristic features of which emerge from the characterizing part of patent claim 1.

In the following the invention with reference to the accompanying drawings, in which Fig. 1-5 in the form of schematic outline drawings show different embodiments of the invention, will be described in more detail. 1.6

Claims (5)

Austrian Patent Office AT 504 422 B1 2010-09-15 [0010] Fig. 1 shows a joint bearing arrangement according to the invention, in which on the bearing block 1 a relative to this fixed outer ring 2 and in this outer ring an inner ring 3 are arranged, wherein the sliding surface between the outside and Inner ring forms the part of a spherical surface. Laterally on the inner ring 3, for example, by removing the required part of the inner ring, substantially in the direction of the nip force F extending side surfaces 3a are formed. Correspondingly, flat portions 2a are formed on the sliding surface of the outer ring 2, for example, by providing the outer ring with side parts substantially corresponding to the part remote from the inner ring. In this case, the joint bearing, guided by the guide surfaces 3a, 2a, is able to rotate in the direction of the nip force F while its rotation in the transverse direction is blocked. Thereby, the rigidity of the roller yoke is increased transversely to the direction of the nip force, and when driving high speeds with open nips so the natural frequency is shifted to a range above the operating range. Reference numeral 20 denotes the roller mounted on the bearing block, the reference numeral 21 denotes its counter roller. Fig. 2 and 3 show an alternative embodiment of the joint bearing in which directly in the bearing block 1, a square bearing housing is formed, in which vertical rotation permitting joint parts 5, 6 and vertical Seitengleitkörper 7, 8 are arranged. The reference numeral 9 denotes the roller yoke surrounding protective parts. In Fig. 4 and 5 an alternative embodiment of the solution shown in Fig. 2 and 3 is shown. In this embodiment, a rotatable outer ring 2 is arranged on the bearing block 1, in which a rectangular in cross-section bearing housing is formed, the corresponding joint bearing parts 5, 6 and Seitengleitkörper 7, 8 as the embodiment in FIGS. 2 and 3. On the bearing block 1 locking elements 11, 12 are arranged, with which the rotatable outer ring can be locked in different positions to the bearing block 1. This solution allows a deviating from the vertical nip force direction. The joint bearing parts 5, 6 are preferably made of bronze plates / plates which are convexly shaped on its underside, wherein, by allowing rotation of the yoke end in the direction of the nip force causing the bending, the bending of the yoke is taken into account. By changing the proportions of the Seitengleitkörper can be adjusted in a relatively simple manner, the position of the nip in the lateral direction. With such a square joint bearing is achieved in comparison to the round spherical plain bearing a higher load capacity, and the production and supply of spare parts are accelerated and cheaper. In addition, the storage is reliable. 1. Spherical bearing for a to be used in paper, board or equipment machines deflection adjustment roller having an axially extending through the roller rotatable yoke, the ends (4) of this yoke protruding from the roller and used in bearing blocks (1) are characterized in that the hinge bearing is designed so that the rotation of the roller is blocked in the bearing in the direction transverse to the plane of the nip force (F) direction. 2. joint bearing according to claim 1, characterized in that in the joint bearing parallel to the nip force (F) extending guide surfaces are formed. 3. joint bearing according to claim 1 or 2, characterized in that the joint bearing of a stationary outer ring (2) and an inner ring (3) is formed on the spherical mating surfaces substantially parallel to the nip force (F) extending, cooperating planar portions (2a , 3a) are formed, which allow a rotation of the hinge bearing in the direction of the nip force (F), but prevent the rotation in the direction transverse thereto. 4. joint bearing according to claim 1 or 2, characterized in that the joint bearing is formed by incorporating a rectangular cross-section bearing housing in the bearing block (1) and in the bearing housing in the plane of the nip force rotatable joint bearing parts (5, 6) and the plane of Nipkraft parallel side slide (7, 8) are arranged. 2/6 Austrian Patent Office AT 504 422 B1 2010-09-15 5. joint bearing according to claim 1 or 2, characterized in that the joint bearing by arrangement of a relative to the bearing block rotatable outer ring (2) in the bearing block (1) is formed and the outer ring (2) has a rectangular cross-section bearing housing, in which Level of the nip force rotatable joint bearing parts (5, 6) and parallel to the direction of the nip force extending side sliding body (7, 8) are arranged. 3 sheets of drawings 3/6