EP0571582B1 - Presse a cylindres - Google Patents

Presse a cylindres Download PDF

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Publication number
EP0571582B1
EP0571582B1 EP92924564A EP92924564A EP0571582B1 EP 0571582 B1 EP0571582 B1 EP 0571582B1 EP 92924564 A EP92924564 A EP 92924564A EP 92924564 A EP92924564 A EP 92924564A EP 0571582 B1 EP0571582 B1 EP 0571582B1
Authority
EP
European Patent Office
Prior art keywords
pressing
press
bearing blocks
roller press
roller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92924564A
Other languages
German (de)
English (en)
Other versions
EP0571582A1 (fr
Inventor
Joachim Grabscheid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0571582A1 publication Critical patent/EP0571582A1/fr
Application granted granted Critical
Publication of EP0571582B1 publication Critical patent/EP0571582B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • D21F3/0245—Means for fixing the sleeve to the roller end
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/001—Wire-changing arrangements

Definitions

  • the invention relates to a roller press, preferably for treating a running web, e.g. Paper web.
  • the roller press comprises two press units, e.g. Press rolls, the main axes of which lie in a press plane and which together form a press nip through which the web runs.
  • the roller press can also comprise three press units, which form two press nips, or four press units, which form three press nips.
  • the invention relates to a roller press with the features specified in the preamble of claim 1.
  • a roller press with the features specified in the preamble of claim 1.
  • US 3,921,514 In this construction, the internally generated (between zero and a maximum) pressing force is transmitted directly from the bearing blocks of one roller to the bearing blocks of the other roller with the aid of tension rods which are designed as screws.
  • the machine frames belonging to the roller press therefore only need to be dimensioned for the weight of the rollers, but not for the transmission of the pressing force.
  • the invention relates in particular to the construction in which one of the two roller shells can be pressed onto the other roller by means of an internal pressing device (for example a press shoe) and can be removed again from the latter.
  • an internal pressing device for example a press shoe
  • a recurring problem arises when, for example, an endless felt belt running through the press nip has to be replaced in a roller press.
  • the flexible press jacket also has to be replaced from time to time.
  • a gap must be temporarily created at least on one of the two roller ends between the two bearing blocks. To do this, the tension rods must be loosened and temporarily removed. After the tape change has been completed, the tension rods must be used again be excited.
  • the invention is therefore based on the object of further developing a roller press of the type mentioned in such a way that the disadvantages mentioned are avoided and a uniform treatment of the web across its width is always ensured.
  • the "main axis" of a press unit can be, for example, the axis of rotation of a press roll shell or the longitudinal axis of the stationary support body, for example a shoe press unit (in the latter case, the axis of rotation can be arranged eccentrically to the main axis).
  • the “circumferential press element” can be a metallic press roll jacket, which is rotatable about a stationary support body and displaceable relative to it in the radial direction, or a press belt or a tubular press jacket, if it is a shoe press unit.
  • the "internal pressure device” can either be a semi-annular pressure chamber or a series of radially movable support elements or an elongated, radially movable press shoe.
  • the "a press unit” the bearing blocks of which are rigidly supported, stands on a frame, foundation or the like, or is suspended (by means of its bearing blocks) from a (e.g. vertical or horizontal) support.
  • the “other press unit” can be arranged above, to the side or below the rigidly supported press unit; their weight is borne by the pedestals of the rigidly supported press unit.
  • the term “rigidly supported” also includes the two-part bearing block construction with axial guide elements.
  • the bearing blocks of the two press units are coupled in pairs at each end of the roller press by means of releasable tension rods.
  • These tension rods are the only ones Element for transferring the pressing force from the bearing block to the bearing block.
  • the machine frames belonging to the roller press need only be dimensioned for the dead weight of the press units, but not for the transmission of the press force. It is also essential that the tension rods are easily detachable.
  • the tension rods - in the unloaded state of the roller press, i.e. at zero pressing force - are not biased at all or only to a fraction (e.g. 1/5) of the maximum pressing force, and the bearing blocks of the one pressing unit are rigidly supported on the machine frame, while the bearing blocks are other press unit are movable along the press plane during operation.
  • tension rods are movable or flexible in a sense, so that the bearing blocks of the "other pressing unit” are movable parallel to the pressing plane relative to the bearing blocks of the rigidly supported pressing unit.
  • each of the Both rollers are mounted in a bearing block via a rotatable bearing journal.
  • Each of the bearing blocks has two large flat guide surfaces on its outer sides, with which it can slide in the vertical direction on corresponding flat guide surfaces of a machine frame.
  • the lower bracket rests on the machine frame, which has a threaded spindle with a vertical axis of rotation above the upper bracket.
  • the threaded spindle engages the upper bracket to adjust the height of the roll gap; a spreading device presses the upper bracket against the spindle. Additional tension rods are unloaded in this operating state and especially during the rolling process.
  • the rolling pressure is therefore not transmitted from the bearing block to the bearing block via the tension rods, but rather via the threaded spindle and the machine frame.
  • the outer guide surfaces of the two bearing blocks are held flush in that the bearing blocks have additional, directly contacting guide surfaces. This means that the pedestals are "centered" on one another - regardless of the machine frame.
  • the mentioned outer guide surfaces which interact with the machine frame, are essential.
  • the following is characteristic of the construction according to the invention: on the bearing blocks alone or at least mainly such guide surfaces are provided which are independent of the machine frame. These guide surfaces are central in that area of the Roll press arranged, which (seen in the axial direction) is close to the press nip. During the normal operating state, in which the roller press is loaded and the tension rods are therefore under tension, the guide surfaces interact with the tension rods in such a way that the bearing blocks are held in the correct position with respect to one another with high accuracy. In other words, the transfer of the pressing force from the bearing block to the bearing block as well as the correct positioning of the "other" pressing unit (whose bearing blocks are movable) is completely independent of the machine frame.
  • each bearing block has only a single guide surface.
  • there is only a single pair of guide surfaces at each end of the roller press which e.g. by spring force (or with an inclined arrangement of the pressing plane) by gravity in mutual contact.
  • each movable bearing block is positioned by a guide surface of the adjacent rigidly supported bearing block in such a way that its main axis is always in the pressing plane.
  • two pairs of guide surfaces parallel to the pressing plane are provided at each end of the roller press.
  • one bearing block can have a projection which engages in a recess in the other bearing block.
  • a removable intermediate piece known per se is preferably provided between the two bearing blocks.
  • this is now designed as a so-called guide piece; ie the side surfaces of the cuboid guide piece parallel to the pressing plane are now guide surfaces; because the guide piece engages - similar to one between a shaft and a hub arranged key - fits snugly into the recesses of the two pedestals to ensure the correct position of the movable pedestals.
  • the intermediate piece can be removed from the recesses, if necessary, for example for a change of felt.
  • a e.g. Spreading device provided on the guide piece. This makes it possible to generate a small pretensioning force in the tie rods before the roller press is started up, in order to ensure the exact position of the tie rods and the movable bearing blocks with even greater accuracy.
  • the roller press shown has an underlying first press roller 1 and an overhead second press roller 3.
  • the axes of these press rollers lie in a press plane E.
  • the first press roller 1 has a rotatable roller jacket 1 a and a bearing journal 2 attached to it, which is mounted in a bearing block by means of a roller bearing 2a 5 (with lids 5a and 5b) rests.
  • the bearing block 5 stands on a frame-shaped machine frame 15, of which some sections are indicated in FIGS. 1 and 2.
  • the upper, second press roll 3 is a so-called long-nip press roll.
  • Your roller shell 3a is a tubular, flexible press jacket which is attached to two rotatable jacket support disks 3b. Each jacket support disk rests on the stationary bearing journal 4 of a stationary support body 4a, which extends through the interior of the roll jacket 3a.
  • the support body 4a has a recess 4b relative to the lower press roll 1 and therein a piston-like and hydraulically actuated press shoe 4c. With its concave sliding surface, the latter presses the press jacket 3a against the lower press roll 1, in order to thereby form an extended press nip (in the running direction).
  • a paper web to be dewatered runs through this together with at least one endless felt belt F.
  • the upper press roll 3 rests (at each roll end) with the bearing journal 4 likewise in a bearing block 6. Between the two bearing blocks 5 and 6 there is a removable one on the bearing block 5 horizontal cuboid guide piece 9 is provided.
  • the bearing block 6 of the upper press roller 3 rests on this when the roller press is in its unloaded state (ie when the recess 4b is depressurized). However, the loaded state is shown in which the press shoe 4c exerts a pressing force on the lower press roll 1.
  • the resulting reaction forces are transmitted from the upper bearing block 6 to the lower bearing block 5 with the aid of flexible tension rods 7 and 8.
  • the upper bracket 6 is lifted in this state by the distance p from the intermediate piece 9.
  • a flexible tension rod 7, 8 is provided on both sides of the pressing plane E. These tension rods and U-shaped intermediate pieces 10, 11 are inserted from the side into recesses in the bearing blocks 5 and 6.
  • the lower bearing block 5 has arms 5c and 5d, in which T-slots are provided.
  • Each of the flexible tension rods 7, 8 has a hammer head 20 at each end and is preferably designed in the manner of a leaf spring, the "leaf plane" of which is perpendicular to the pressing plane E. lies.
  • the upper bearing block 6 can be rigidly connected to the bearing journal 4; the axial sliding surface between these two components required in an older construction and a spherical sleeve can be dispensed with.
  • the invention can also be used when the axial sliding surface and the spherical sleeve are present, the tension rods not having to be flexible.
  • the following is essential:
  • a recess 25 is provided in the lower bearing block 5 according to FIG. 1, which has side surfaces parallel to the pressing plane E.
  • a recess 26 is provided in the upper bearing block 6, which also has side surfaces parallel to the pressing plane E.
  • the guide piece 9 can be removed; in this case it can be used together with the bearing block 5 form a one-piece component; in other words: it can form a nose formed on the bearing block 5.
  • the guide piece is divided by a horizontal parting line into an upper and a lower section, for example only the lower section performing the guiding function and therefore engaging in both recesses 25 and 26. The height of the upper section can be adjusted using a spreading device.
  • An axis of rotation 27 perpendicular to the pressing plane E is fixed in the upper bearing block 6.
  • the head 28 of a threaded spindle 23 is rotatably mounted so that the axis of the threaded spindle is always in the pressing plane E (or at a short distance from it and parallel to it).
  • the threaded spindle 23 extends into a bore 21 provided in the guide piece 9.
  • a spindle nut 22 can come into contact with the guide piece 9 by turning on the spindle 23.
  • a slight pretension can be applied to the tension rods 7, 8, which is retained if the pressing force is temporarily reduced to zero during operation.
  • the bearing block 6 does not rest directly on the guide piece 9, but indirectly via the axis of rotation 27, spindle 23 and spindle nut 22.
  • the procedure is as follows: First, the upper press roller 3 is raised somewhat with the aid of an eyelet 12 and a hydraulic cylinder 16 which hangs on the machine frame 15, so that the spindle nut 22 is twisted open the spindle 23 can be released from the guide piece 9. Then the press roll is lowered until the bearing block 6 rests directly on the guide piece 9. Now the tension rods 7, 8 and intermediate pieces 10, 11 can be removed will. For example, the tension rod 8 is pushed onto a bolt 14 which is fastened to the machine frame 15. Now the upper press roll 3 is raised again with the help of the hydraulic cylinder 16. Thus, the guide piece 9 can now be swiveled out laterally upwards together with the spindle 23, as shown in FIG. 2 with dash-dotted lines. The guide piece 9 remains permanently connected to the spindle 23 with the aid of a small bolt 29 which extends transversely through the guide piece and the spindle.
  • the spreading device consisting of the parts 22, 23, 27, 28 can also be arranged below the guide piece 9 in the bearing block 5, so that the guide piece is pivoted out laterally downward.

Claims (6)

  1. Presse à cylindres de préférence pour le traitement d'une bande en défilement par exemple d'une bande de papier, comportant deux unités de presse (1, 3) dont les axes principaux sont situés dans un plan de presse (E) et forment entre eux un intervalle de presse traversé par la bande, caractérisée par les éléments suivants :
    a) l'une des deux unités de presse (3) a un organe de support (4, 4a) fixe, s'étendant à travers une enveloppe de cylindre (3a) rotative et une installation de mise en pression (4b, 4c) interne pour déplacer radialement l'enveloppe du cylindre et créer une force de presse s'exerçant dans l'intervalle de presse sur la bande,
    b) à chaque extrémité du cylindre de presse, les deux unités de presse (1, 3) sont appuyées dans les blocs de palier (5, 6) qui sont couplés par paire par l'intermédiaire de barres de traction (7, 8) amovibles, servant à transmettre la force de la presse d'un bloc de palier à l'autre,
    c) les blocs de palier (5) de l'une des deux unités de presse (1) sont appuyés directement sur un bâti de machine (15), les fondations ou des moyens analogues et portent au moins une partie du poids de l'autre unité de presse (3),
    caractérisée par les moyens suivants :
    d) les barres de traction (7, 8) sont précontraintes au plus à une fraction de la force de presse maximale lorsque la force de presse est nulle,
    e) un bloc de palier (6) des blocs de palier (5, 6) couplés par paire est mobile par rapport à l'autre bloc de palier (5) de façon que ce bloc (6), lorsque la presse à cylindres est chargée, soit décalé d'une distance (p) le long du plan de presse (E) par rapport à sa position lorsque la presse à cylindres est à l'état non chargé, par rapport à l'autre bloc de palier (5),
    f) les blocs de palier (5, 6) sont guidés l'un par rapport à l'autre à l'aide d'au moins une paire de surfaces de guidage (24, 25 ; 24 ; 26) des surfaces de guidage étant parallèle au plan de presse (E) et sont indépendantes d'un bâti de machine (15) fixe, d'un châssis ou moyen analogue.
  2. Presse à cylindres selon la revendication 1, caractérisée par les moyens suivants :
    a) une pièce de guidage (9) amovible est prévue entre les blocs de palier (5, 6) couplés l'un à l'autre ;
    b) les blocs de palier (5, 6) couplés par paire ont, vu dans la direction axiale, chacun une cavité (25, 26), la pièce de guidage (9) pénétrant dans les cavités avec ses surfaces latérales (24) parallèles au plan de presse (E).
  3. Presse à cylindres selon les revendications 1 ou 2, caractérisée en ce qu'entre les blocs de palier (5, 6) couplés par paire, se trouve un dispositif d'écartement (22, 23).
  4. Presse à cylindres selon la revendication 3, caractérisée en ce que l'un des deux blocs de palier (6) couplés par paire est relié à la pièce de guidage (9) par une broche filetée (23).
  5. Presse à cylindres selon la revendication 4, caractérisée en ce que la pièce de guidage (9) comporte un perçage (21) dans lequel pénètre l'extrémité libre d'une tige filetée (23) et cette tige filetée est munie d'un écrou (22) qui, par rotation, peut s'appliquer contre la pièce de guidage (9).
  6. Presse à cylindres selon l'une des revendications 4 ou 5, caractérisée en ce que la tige filetée (23) peut pivoter avec la pièce de guidage (9) autour d'un axe de rotation (27) perpendiculaire au plan de pression (E) et fixée dans l'un des blocs de palier (6) couplé par paire.
EP92924564A 1991-12-11 1992-12-10 Presse a cylindres Expired - Lifetime EP0571582B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4140876A DE4140876C2 (de) 1991-12-11 1991-12-11 Walzenpresse
DE4140876 1991-12-11
PCT/DE1992/001030 WO1993012290A1 (fr) 1991-12-11 1992-12-10 Presse a cylindres

Publications (2)

Publication Number Publication Date
EP0571582A1 EP0571582A1 (fr) 1993-12-01
EP0571582B1 true EP0571582B1 (fr) 1996-07-17

Family

ID=6446821

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92924564A Expired - Lifetime EP0571582B1 (fr) 1991-12-11 1992-12-10 Presse a cylindres

Country Status (8)

Country Link
US (1) US5385088A (fr)
EP (1) EP0571582B1 (fr)
JP (1) JPH06509848A (fr)
AT (1) ATE140496T1 (fr)
CA (1) CA2103820C (fr)
DE (2) DE4140876C2 (fr)
FI (1) FI104909B (fr)
WO (1) WO1993012290A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008016000B3 (de) * 2008-03-27 2009-06-25 Andritz Küsters Gmbh Walzenpresse

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DE4417760C2 (de) * 1994-05-20 1999-03-25 Voith Sulzer Papiermasch Gmbh Preßvorrichtung
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008016000B3 (de) * 2008-03-27 2009-06-25 Andritz Küsters Gmbh Walzenpresse

Also Published As

Publication number Publication date
EP0571582A1 (fr) 1993-12-01
DE59206787D1 (de) 1996-08-22
US5385088A (en) 1995-01-31
FI933524A0 (fi) 1993-08-10
JPH06509848A (ja) 1994-11-02
FI933524A (fi) 1993-08-10
CA2103820C (fr) 2004-06-01
CA2103820A1 (fr) 1993-06-12
DE4140876C2 (de) 1994-04-21
DE4140876A1 (de) 1993-06-17
FI104909B (fi) 2000-04-28
WO1993012290A1 (fr) 1993-06-24
ATE140496T1 (de) 1996-08-15

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