EP1925723B1 - Machine à papier tissu - Google Patents

Machine à papier tissu Download PDF

Info

Publication number
EP1925723B1
EP1925723B1 EP20070120951 EP07120951A EP1925723B1 EP 1925723 B1 EP1925723 B1 EP 1925723B1 EP 20070120951 EP20070120951 EP 20070120951 EP 07120951 A EP07120951 A EP 07120951A EP 1925723 B1 EP1925723 B1 EP 1925723B1
Authority
EP
European Patent Office
Prior art keywords
press roll
adjusting unit
machine according
operating position
piston rod
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.)
Not-in-force
Application number
EP20070120951
Other languages
German (de)
English (en)
Other versions
EP1925723A1 (fr
Inventor
Christian Schmid
Andreas Meschenmoser
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.)
Voith Patent GmbH
Original Assignee
Voith Patent 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
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP1925723A1 publication Critical patent/EP1925723A1/fr
Application granted granted Critical
Publication of EP1925723B1 publication Critical patent/EP1925723B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D21F3/06—Means for regulating the pressure
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus
    • D21G1/002—Opening or closing mechanisms; Regulating the pressure

Definitions

  • the invention relates to a machine for producing or processing a material web, in particular paper, board or tissue web, with a press unit according to the preamble of patent claim 1.
  • Tissue paper machines for example, comprise a press unit formed by a press roll and a counterpressure roll formed as a drying cylinder, in which often the press roll is pivotally mounted on a bearing lever relative to the press roll, so that the press roll is moved between an operating position, in the the press roll is pressed against the counter press roll, and a non-operating position in which the press roll is not pressed against the counter press roll, is movable.
  • the adjusting unit is designed as a hydraulic cylinder.
  • the storage lever in the operating position must be permanently supported by the hydraulic pressure in the hydraulic cylinder in order to achieve the required contact pressure of the press roll to the counterpressure roll.
  • the disadvantage of such a press unit known from the prior art is that a high mechanical holding force has to be permanently applied by the hydraulic cylinder during operation.
  • the exact operating position is not reproducible adjustable and must therefore be constantly adjusted by means of complex control systems.
  • Such a press unit of a machine for producing or processing a material web, comprising a press roll designed as a suction press roll and a counterpressure roll is disclosed in the document DE 15 61 700 A1 known. The press roll is mounted on a pivotable bearing lever.
  • Adjustment unit By means of at least one acting on the bearing lever Adjustment unit can this between an operating position in which the press roller is pressed against the counter-pressure roller, and a position outside the operating position in which the press roller is not pressed against the counter-pressure roller, are moved.
  • This embodiment is an application in a dryer in which the press roll is set against a drying cylinder.
  • the press roller is hinged to the support frame of the drying cylinder.
  • the suspension are associated with means for generating the pressing pressure, in particular pressure cylinder.
  • the adjustment means comprising said devices must be designed in such a way that it is both suitable for generating and / or supporting the corresponding pressing and holding forces, and also for positioning the press roll relative to the counter roll. It requires the exact location fixation of a considerable control effort due to the continuously required pressurization of the facilities and also a corresponding structural design of these in order to transmit the required forces.
  • the machine according to the invention for producing or processing a material web, in particular paper, board or tissue web has a press unit comprising at least one press roll and a counter press roll, wherein the press roll is mounted on a pivotable support lever and by means of at least one adjustment unit acting on the support lever between an operating position in which the press roll is pressed against the counter press roll, and a non-operating position in which the press roll is not pressed against the counter press roll, is movable.
  • the machine according to the invention is characterized in that the press roll (3) is a shoe press roll and the at least one adjusting unit comprises a locking device by means of which the adjusting unit is mechanically lockable in the operating position.
  • the mechanical lock produced by the locking device can be released again in order to be restored at a later point in time when the press roll is again pivoted into the operating position.
  • an adjusting unit comprising a locking device by means of which the adjusting unit can be mechanically locked in the operating position
  • the hydraulic cylinder is relieved during operation and thus the operating line force is not exceeded by the oil pressure Hydraulic cylinder must be supported.
  • the use of a complex and stiff on the machine chair directly mounted locking lever is avoided.
  • the operating position comprises a plurality of operating positions in which the press roller and the counter-pressure roller are each pressed to different degrees against each other, wherein the locking device is designed such that the adjustment is mechanically locked in each of the different operating positions.
  • an embodiment of the invention provides that the adjustment unit has a hydraulic cylinder with a cylinder wall and a movable piston rod in the longitudinal extent of the cylinder, wherein a releasable mechanical locking between the wall and the piston rod is mediated by the locking device.
  • the locking device is arranged within the adjustment, the way to lock and unlock is small whereby the locking and unlocking can be made quickly.
  • the locking device is encapsulated in the hydraulic cylinder, whereby a functional impairment is prevented by contamination.
  • the locking device has a circumferentially extending piston rod at least partially extending groove or bead and mounted on the cylinder engaging member, wherein the engagement member is movable relative to the piston rod so that this in the operating position to effect locking with the groove or bead is positively engageable engageable.
  • the engagement element is movable substantially perpendicular to the direction of movement of the piston rod.
  • the engagement element may be formed by one or more annular segments which are complementary in shape to the groove or bead.
  • the adjusting unit comprises a mechanical spindle gear.
  • a further particularly preferred embodiment of the invention provides that the storage lever is mounted in the region of its one longitudinal end about an axis rotatably mounted on the machine frame and that the adjustment acts on the storage lever at a location in the region of its other longitudinal end.
  • the axis of rotation of the press roll is arranged closer to the axis of rotation of the bearing lever as the adjusting unit on the axis of rotation of the bearing lever.
  • the adjusting unit has a larger lever than the press roller with respect to the axis of rotation of the bearing lever with the advantageous result that both the holding force in the operating position and the force for pivoting the press roller to and from the counter press roller over the prior art are significantly reduced can. Therefore, the adjustment can be made smaller, which brings cost advantages.
  • the counterpressure roll may be a drying cylinder, in particular a Yankee drying cylinder.
  • the drying cylinder is heated, so that a tear of the paper web leads to a direct contact between the plastic shell of the press roll and the counterpressure roll designed as a drying cylinder, which can result in damage to the plastic shell of the press roll.
  • the FIG. 1 shows a tissue machine 1 according to the prior art.
  • the tissue paper machine 1 has a press unit which comprises a counterpressure roller designed as a Yankee drying cylinder 2 (hatched, partially covered by machine stools) and a press roller designed as a shoe press roller 3.
  • the shoe press roll 3 is rotatably mounted on an L-shaped support lever 4 about its axis of rotation 5, which in turn is mounted rotatably about the axis 7 on the machine frame 6.
  • an acting on the support lever 4 and designed as a hydraulic cylinder adjustment 8 By means of an acting on the support lever 4 and designed as a hydraulic cylinder adjustment 8, the shoe press roll 3 between an operating position in which it is pressed against the Yankee drying cylinder 2, and a non-operating position in which the shoe press roll 3 is not pressed against the Yankee drying cylinder 2 is to be moved.
  • a press nip 9 is formed between the shoe press roll 3 and the Yankee drying cylinder 2, through which a tissue paper web 10 is guided.
  • the adjusting unit 8 When in the FIG. 1 1, the adjusting unit 8 has no locking device for the mechanical locking of the adjusting unit 8 in the operating position. Furthermore, there is an unfavorable lever ratio between the point of application of the adjusting unit 8 and the axis of rotation 5 of the shoe press roll 3, since the adjustment 8 engages closer to the axis of rotation 7 of the bearing lever 4 as the axis of rotation 5 of the shoe press roll 3 is removed from the axis of rotation 7.
  • the FIG. 2 shows a further paper machine 11.
  • the tissue paper machine 11 has a press unit, which as a Yankee drying cylinder 2 (hatched drawn, as partially covered by machine chair) formed counterpressure roller and formed as a shoe press roll 3 press roll.
  • the shoe press roll 3 is rotatably mounted on a linear bearing lever 12 about its axis of rotation 5, which in turn is mounted rotatably about the axis 7 on the machine frame 6.
  • an acting on the bearing lever 12 and designed as a hydraulic cylinder adjustment 8 By means of an acting on the bearing lever 12 and designed as a hydraulic cylinder adjustment 8, the shoe press roll 3 between an operating position in which it is pressed against the Yankee drying cylinder 2, and a non-operating position in which the shoe press roll 3 is not pressed against the Yankee drying cylinder 2 is to be moved.
  • a press nip 9 is formed between the shoe press roll 3 and the Yankee drying cylinder 2, through which a tissue paper web 10 is guided.
  • the adjusting unit 8 no locking device for mechanical locking of the adjusting unit 8 in the operating position.
  • the shoe press roll 3 is rather held in the operating position by means of a locking projection 13, which is pivotably mounted on the machine frame 6 and which can be actuated via an adjusting unit 14 and can be pivoted on and off for locking.
  • a locking projection 13 which is pivotably mounted on the machine frame 6 and which can be actuated via an adjusting unit 14 and can be pivoted on and off for locking.
  • the FIG. 3 shows a paper machine 14 according to the invention.
  • the tissue paper machine 14 has a press unit which comprises a Yankee drying cylinder 2 (hatched, partially covered by machine chairs) formed counterpressure roller and formed as a shoe press roll 3 press roll.
  • a press unit which comprises a Yankee drying cylinder 2 (hatched, partially covered by machine chairs) formed counterpressure roller and formed as a shoe press roll 3 press roll.
  • the shoe press roll could alternatively be provided a cylinder press roll.
  • the shoe press roll 3 is rotatably mounted on a linear support lever 15 about its axis of rotation 5, which in turn is mounted rotatably about the axis 7 on the machine frame 6.
  • the adjusting unit 16 is in cross section in FIG. 4 shown. This comprises a hydraulic cylinder 17 with a cylinder wall 18 and a longitudinal extent of the cylinder wall by pressurization in the pressure chamber 23 movable piston rod 19. The free end of the piston rod 19 -that which looks out of the cylinder wall engages the bearing lever 15, while the cylinder wall 18 indirectly or directly supported on the machine frame 6.
  • the adjusting unit 16 further comprises a locking device, by means of which the adjusting unit 16 is mechanically locked in an operating position, wherein a mechanical locking between the wall 18 and the piston rod 19 is mediated by the locking device.
  • the locking device comprises a circumferential groove 20 in the circumferential direction of the piston rod 20 and an inner cylinder wall 18 mounted and formed by a plurality of groove 20 complementary complementary ring segments 21 engagement element which are perpendicular to the direction of movement of the piston rod 19 movable so that they are in the operating position for Actuation of the lock with the groove 21 are positively engageable engageable.
  • the reciprocating motion of the ring segments 21 can be effected by alternately pressurizing the ring segments 21 with hydraulic fluid 22 (the solid line shows the ring segments 21 in the locking position, whereas the broken line shows the ring segments in the unlocked position of the adjusting unit 16).
  • the leadership of the ring segments 21 in their movement is accomplished by guide elements 23.
  • piston rod 19 a plurality of longitudinal grooves arranged in the longitudinal direction of the piston rod 19 so that several operating positions can be assumed in the operating position in which the shoe press roll 3 and the Yankee drying cylinder 2 are pressed against each other to different degrees are and the piston rod 19 is mechanically locked in each of the different operating positions relative to the cylinder wall 18.
  • the storage lever 15 is rotatably mounted in the region of its one longitudinal end on the machine frame 6 and that the adjusting unit 16 acts on the storage lever 15 in the region of its other longitudinal end.
  • the FIG. 3 can be seen that the rotation axis 5 of the press roller 3 is arranged closer than the adjusting unit 16 on the axis of rotation 7 of the bearing lever 15.

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  • Paper (AREA)

Claims (10)

  1. Machine (14) de fabrication ou d'amélioration d'une bande de matériau, en particulier d'une bande de papier, de carton, ou de papier-tissu (10), comprenant une unité de pressage constituée par au moins un rouleau de pressage (3) et un rouleau de pressage conjugué (2), le rouleau de pressage (3) étant supporté sur un levier de support pivotant (15) et pouvant être déplacé au moyen d'au moins une unité de réglage (16) agissant sur le levier de support (15) entre une position fonctionnelle dans laquelle le rouleau de pressage (3) est pressé contre le rouleau de pressage conjugué (2) et une position non fonctionnelle dans laquelle le rouleau de pressage (3) n'est pas pressé contre le rouleau de pressage conjugué (2),
    caractérisée en ce que
    le rouleau de pressage (3) est un rouleau de pressage à sabot et l'au moins une unité de réglage (16) comprend un dispositif de verrouillage (20, 21, 22, 23) au moyen duquel l'unité de réglage (16) peut être bloquée mécaniquement dans la position fonctionnelle.
  2. Machine selon la revendication 1,
    caractérisée en ce que
    la position fonctionnelle comprend plusieurs positions fonctionnelles dans lesquelles le rouleau de pressage (3) et le rouleau de pressage conjugué (2) sont pressés l'un contre l'autre à chaque fois avec une force différente, le dispositif de verrouillage (20, 21, 22, 23) étant réalisé de telle sorte que l'unité de réglage (16) puisse être bloquée mécaniquement dans chacune des différentes positions fonctionnelles.
  3. Machine selon la revendication 1 ou 2,
    caractérisée en ce que
    l'unité de réglage (16) comprend un cylindre hydraulique (17) avec une paroi de cylindre (18) et une tige de piston (19) pouvant être déplacée suivant l'étendue longitudinale de la paroi de cylindre (18), un blocage mécanique entre la paroi et la tige de piston étant réalisé par le dispositif de verrouillage (20, 21, 22, 23).
  4. Machine selon la revendication 1, 2 ou 3,
    caractérisée en ce que
    le dispositif de verrouillage (20, 21, 22, 23) comprend une rainure (20) ou un bourrelet s'étendant au moins en partie dans la direction périphérique de la tige de piston (19) ainsi qu'un élément d'engagement (21) supporté sur la paroi de cylindre (18), lequel peut être déplacé par rapport à la tige de piston (19) de telle sorte qu'il puisse être amené en prise par engagement par correspondance de formes dans la position fonctionnelle pour réaliser le blocage avec la rainure (20) ou le bourrelet.
  5. Machine selon la revendication 4,
    caractérisée en ce que
    l'élément d'engagement (21) peut être déplacé essentiellement perpendiculairement à la direction de déplacement de la tige de piston (19).
  6. Machine selon la revendication 5,
    caractérisée en ce que
    l'élément d'engagement (21) est formé par un ou plusieurs segments annulaires (21) réalisés avec une complémentarité de formes par rapport à la rainure (20) ou au bourrelet.
  7. Machine selon la revendication 1 ou 2,
    caractérisée en ce que
    l'unité de réglage comprend une transmission à broche mécanique.
  8. Machine selon l'une quelconque des revendications 1 à 6,
    caractérisée en ce que
    le levier de support (15) est supporté sur le bâti de la machine (6) dans la région de l'une de ses extrémités du côté longitudinal de manière à pouvoir tourner autour d'un axe (7) et en ce que l'unité de réglage (16) agit sur le levier de support (15) dans la région de son autre extrémité du côté longitudinal.
  9. Machine selon la revendication 7,
    caractérisée en ce que
    l'axe de rotation (5) du rouleau de pressage (3) est disposé plus près que l'unité de réglage (16) de l'axe de rotation (7) du levier de support (15) .
  10. Machine selon l'une quelconque des revendications 1 à 8,
    caractérisée en ce que
    le rouleau de pressage conjugué est un cylindre de séchage, en particulier un cylindre de séchage Yankee (2).
EP20070120951 2006-11-23 2007-11-19 Machine à papier tissu Not-in-force EP1925723B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610055711 DE102006055711A1 (de) 2006-11-23 2006-11-23 Tissuepapiermaschine

Publications (2)

Publication Number Publication Date
EP1925723A1 EP1925723A1 (fr) 2008-05-28
EP1925723B1 true EP1925723B1 (fr) 2015-01-28

Family

ID=38951345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20070120951 Not-in-force EP1925723B1 (fr) 2006-11-23 2007-11-19 Machine à papier tissu

Country Status (2)

Country Link
EP (1) EP1925723B1 (fr)
DE (1) DE102006055711A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019119894A1 (de) * 2019-07-23 2021-01-28 Voith Patent Gmbh Presseneinheit
DE102019119905A1 (de) * 2019-07-23 2021-01-28 Voith Patent Gmbh Schuhpresse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB783421A (en) * 1954-05-05 1957-09-25 Bowater Res & Dev Co Ltd Device for controlling the operation of a press roll
DE1561700A1 (de) 1967-10-17 1970-10-15 Voith Gmbh J M Selbstabnahme-Papiermaschine
FI86450C (fi) * 1989-10-25 1992-08-25 Ahlstroem Valmet Funktionsanordning av modulkonstruktion foer valsarna i en maskinkalander.
DE19623700C1 (de) * 1996-06-14 1997-06-12 Berstorff Gmbh Masch Hermann Anstellvorrichtung für die Walzen eines Kalanders

Also Published As

Publication number Publication date
DE102006055711A1 (de) 2008-05-29
EP1925723A1 (fr) 2008-05-28

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