EP1075564B1 - Presswalze für eine langspaltpresse und verwendung der walze in einer pressenpartie - Google Patents

Presswalze für eine langspaltpresse und verwendung der walze in einer pressenpartie Download PDF

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Publication number
EP1075564B1
EP1075564B1 EP99906273A EP99906273A EP1075564B1 EP 1075564 B1 EP1075564 B1 EP 1075564B1 EP 99906273 A EP99906273 A EP 99906273A EP 99906273 A EP99906273 A EP 99906273A EP 1075564 B1 EP1075564 B1 EP 1075564B1
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EP
European Patent Office
Prior art keywords
extended
nip
roll
press
loading
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
EP99906273A
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English (en)
French (fr)
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EP1075564A1 (de
Inventor
Jorma Laapotti
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Valmet Technologies Oy
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Metso Paper Oy
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Publication of EP1075564A1 publication Critical patent/EP1075564A1/de
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Publication of EP1075564B1 publication Critical patent/EP1075564B1/de
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    • 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
    • D21F3/04—Arrangements thereof
    • 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

Definitions

  • the invention relates to an extended-nip press roll for a paper machine, comprising a stationary central axle, a loading shoe, and hydraulic loading elements situated between said stationary axle and said loading shoe, by means of which elements an active frontal face of the loading shoe is pressed against an inner face of a flexible hose mantle of the extended-nip press roll in order to produce a compression pressure in an extended-nip zone formed by said extended-nip press roll with its backup roll, the loading shoe and the loading arrangements of the loading shoe being substantially symmetrical in relation to the axial centre plane (K-K) of the extended nip press roll.
  • K-K axial centre plane
  • the invention relates to a press section of a paper machine comprising at least two extended nips.
  • Extended-nip rolls, or hose rolls, of prior art are designed and constructed so that they have a given direction of rotation, and the prior-art rolls do not operate when rotating in an opposite direction, because the structure of the press shoe and the circulation and drain systems of oil do not allow a change in the direction of rotation.
  • press sections applying extended-nip zones and extended-nip press rolls today employ two or even more extended-nip rolls, which are, in addition, arranged such that, in said extended-nip rolls, the direction of rotation of their hose mantle changes because an extended-nip roll is both in the upper and in the lower position in the same press section.
  • extended-nip rolls must be especially designed so as to take the direction of rotation into consideration, which increases manufacturing and spare part costs.
  • said multi-nip extended-nip presses must have an extended-nip replacement roll of its own for both directions of rotation. This increases capital, storage and spare part costs considerably, since the typical price of an extended-nip hose roll is of the order of 5 to 15 million FIM.
  • the principal object of the present invention is to eliminate the above-noted drawbacks and to provide a new extended-nip press roll and press section arrangements that apply them in a paper machine.
  • the extended-nip press roll in accordance with the invention is mainly defined by the characterizing features of claim 1.
  • the press section in accordance with the invention is in turn characterized in that in extended nips of the press section there are extended-nip press rolls in accordance with the invention in positions having directions of rotation which are different from one another, and which extended-nip press rolls form extended-nip zones with their backup rolls, through which zones a paper web is passed.
  • the structure of the extended-nip press roll in accordance with the invention is such that its direction of rotation can be changed without changing the internal structure of the roll. This is useful for the reason that, for instance, in a press section comprising two extended nips, the extended-nip rolls may be totally identical, although their positions and directions of rotation are opposite. In that case, a preassembled spare extended-nip roll is suitable for positions requiring opposite directions of rotation. Advantages are also achieved in design and manufacture of extended-nip rolls, since the direction of rotation of the roll may be either direction so that only one kind of extended-nip rolls and their spare rolls are needed.
  • the lubricating-oil drain system in the extended-nip press roll in accordance with the invention is such that lubricating oil drains from the roll with both directions of rotation when the press shoe is in an upper or in a lower position or even in an intermediate position.
  • the structure of the press shoe is such that power consumption is minimized, in particular in a chamber area in a hydrostatic middle area of the front and rear ends of hydrodynamic shoes.
  • the press shoe is shaped so that breaking of a glide belt mantle caused by a paper clod is minimized in the area of the hydrostatic chamber.
  • the lubrication situation of the press shoe is ensured by a tilting system of the press shoe, by means of which the compression pressure at the front edge of the shoe can be regulated so as to be lower than the pressure at the rear edge.
  • the invention also encompasses press sections which apply extended-nip press rolls that are identical with one another in accordance with the invention and which comprise at least two extended-nip rolls in accordance with the invention, which extended-nip rolls are in positions having directions of rotation different from each other, and which extended-nip press rolls form extended-nip zones with their backup rolls.
  • the backup roll may be, for example, a smooth-faced centre roll of the applicant's Sym-Press IITM press section or, alternatively, the press section comprises at least two separate successive extended-nip press zones, between which the web preferably has a closed draw which is provided by utilizing press fabrics and suction transfer rolls and/or special transfer fabrics in a manner known in itself.
  • Figure 1 shows an extended-nip press roll in accordance with the invention in its lower position forming an extended-nip zone with a backup roll situated in an upper position.
  • Figure 1A shows, in a manner corresponding to that of Fig. 1, an extended-nip press roll of the invention and an embodiment of its press shoe where a hydrostatic chamber is provided by means of arcs of a circle.
  • Figure 1B shows a section IB ⁇ IB in Fig. 1A of the press shoe of Fig. 1A, i.e. a section in a cross-machine direction.
  • Figure 2 shows an extended-nip press roll identical with that of Fig. 1 in a upper position such that the direction of rotation of the extended-nip roll is opposite to the direction of rotation of the extended-nip roll shown in Fig. 1.
  • Figure 3 is an axonometric view of the press shoe of the extended-nip press roll illustrated in Figs. 1 and 2.
  • Figure 4 is an axial vertical sectional view of the extended-nip press along the line IV ⁇ IV indicated in Fig. 1.
  • FIG. 5 shows a Sym-Press IITM press section of the applicant where two extended-nip press rolls in accordance with the invention are employed in positions where their directions of rotation are opposite to each other.
  • Figure 6 shows a press section of a paper machine which is provided with two successive extended-nip rolls in accordance with the invention, which press section uses a totally closed draw from a forming wire to a drying wire, and in which press section the extended-nip press rolls are in positions where their directions of rotation are opposite to each other.
  • the extended-nip press shown in Figs. 1, 1A, 2 and 4 comprises an extended-nip press roll 10 (hereafter a hose roll 10) in accordance with the invention and a backup roll which is a press roll 20 provided with a smooth cylinder mantle 21.
  • the backup roll 20 may be a variable-crown roll, which may also have a hollow face, if a paper web W runs through an extended nip zone EN between two felts.
  • a glide belt mantle 16 loaded by a press shoe 11 in its area A-A, a press felt 22 and the paper web W being pressed run through the extended-nip zone EN.
  • the paper web W is situated at one side thereof against an outer face of a loop of the water-receiving press felt 22 and at the other side thereof against the smooth face 21 of the backup roll 20.
  • the hose roll 10 is symmetrical in structure with respect to its axial centre plane K ⁇ K. Partly owing to this, the hose roll 10 having the same structure can be used in a lower position shown in Figs. 1, 1A and 4 and in an upper position shown in Fig. 2. In the lower position shown in Figs. 1, 1A and 4, the direction of rotation of the hose mantle 16 is opposite to the direction of rotation of the hose mantle 16 situated in the upper position shown in Fig. 2. In Figs. 1, 1A and 4, the direction of rotation of the hose mantle 16 is clockwise and, in a corresponding way, in Fig. 2 counterclockwise.
  • hose rolls 10 of the same structure can be used in different extended nips, because the direction of rotation of the hose mantle 16 can be changed, i.e. the direction of rotation of the hose mantle 16 can be either direction without the functional properties of the hose roll 10 being substantially altered.
  • Figs. 5 and 6 described in more detail further on show some particularly advantageous press sections, which both apply two hose rolls 10 which are identical in structure with each other in accordance with the invention.
  • Fig. 3 is an axonometric view of the structure of the press shoe 11.
  • the press shoe 11 has an active frontal face 18 that is pressed against an inner face of the flexible hose mantle 16.
  • Hydrostatic chambers 19 1 ⁇ 19 N open onto the frontal face 18.
  • two loading cylinder series 12 are supplied, in the direction of the arrow O in through a tube bundle 25, with different pressures P 1 ⁇ P N , by whose means the pressure distribution in the nip can be regulated, in a manner known in itself, both in the cross direction and in the machine direction in the extended-nip zone EN.
  • So-called lubricating oil is introduced into the hydrostatic chambers 19 1 ⁇ 19 N through the tube bundle 25 and through capillary nozzles 17 (Fig. 1B), the rate of flow of which oil can be regulated, in which connection the rate of flow and the compression loading of the press shoe together determine the oil pressure P produced in the static chambers 19 1 ⁇ 19 N .
  • the oil pressure P in the chambers 19 1 ⁇ 19 N produces a compression pressure in the area of the static chambers.
  • the upper press roll 20 is journalled on bearing supports 23a, 23b at its axle journals 22a and 22b.
  • the roll 20 is rotated by a drive means 24.
  • the mantle 16 of the hose roll 10 is arranged to be rotatable about a central axle 15.
  • the central axle 15 is carried by supports 27a and 27b, which are supported on a frame part 50. Lubricating and loading oils are passed to the hose roll 10 from its driving side through the tube bundle 25 and the oils are returned through the operating side by means of a hose 26 to circulation O out .
  • the frontal face 18 of the press shoes 11 is symmetrical in relation to the plane K ⁇ K, comprising, starting from the outer edges, rounded edge parts having a radius of curvature R 3 , which edge parts continue as front and rear edge parts 11a and 11b having a substantially larger radius of curvature R 4 .
  • the parts 11a and 11b having the radius of curvature R 4 position the press shoe 11 pivotally between the inner plane faces of support parts 14.
  • the support parts 14 are attached to the central axle 15, which is stationary.
  • the extended-nip zone EN is loaded by the frontal face 18 of the press shoe 11 as positioned by the inner faces of the support parts 14 and supported by the loading cylinders 12.
  • the extended-nip zone EN is formed between lines A ⁇ A comprising, on both sides of its symmetry centre plane K-K from the edge inwards, plane portions A ⁇ B of the frontal face 18, portions B-C having a radius of curvature R 2 , and plane portions C ⁇ D.
  • the radius of curvature R 2 of the curved portion B ⁇ C R 1 + P + ⁇ , where R 1 is the radius of the backup roll 20, PT is the thickness of the fabric 22 + that of a hose mantle, such as the belt 16, and ⁇ is an additional length ⁇ ⁇ 0 ⁇ 5 mm.
  • the radius of curvature R 4 is preferably R 4 ⁇ 0.5 x L where L (Fig. 3) is the total length of the shoe 11, i.e.
  • a hydrodynamic area extending from the point A to the point B of the press shoe 11 in Fig. 1, which area is preferably parallel to a tangent to the radius R 2 of the portion B ⁇ C and has a length of about 0 ⁇ 25 mm.
  • a short length A-B is advantageous in respect of a rapid pressure drop at the trailing edge and in respect of minimizing the rewetting of the web W that is being pressed, but the length A ⁇ B must, however, be sufficiently long in order to form a good lubricating oil layer. If the length A ⁇ B is alternatively zero, the radius R 3 shall be relatively large, for instance, about 50 ⁇ 100 mm, in order to form a sufficient hydrodynamic wedge.
  • the radius of curvature of the shoe is R 2 .
  • the length B ⁇ C is about 10-50 mm.
  • hydrodynamic wedges are formed when "tilting" with the loading cylinder series 12 by forces F 1 ,F 2 .
  • the nip pressure in the extended-nip zone EN is produced by means of two series of loading cylinders 12 and by means of a pressure P of the pressure oil introduced into the hydrostatic chambers 19 1 ⁇ 19 N . There are two series (rows) of loading cylinders 12 adjacent to each other in the machine direction.
  • the separate cylinders may also be replaced with two chambers extending in the cross direction of the machine and with piston parts having the shape of the chambers and movably sealed against said chambers, and a loading pressure is passed "under” the piston parts sealed to the walls of the chamber.
  • the area extending from the line C in the frontal face 18 of the press shoe 11 to the centre line D in Fig. 1 is preferably a straight area having an angle a of inclination (a ⁇ 1 ⁇ 5°) or a wedge area having slightly concave or convex sides.
  • the chambers confined by the lines C and D may also be formed of a radius R 6 that is smaller than the radius R 2 and of corner roundings of the chambers 19 1 ⁇ 19 N (Fig. 1A).
  • the machine-direction length of the hydrostatic chambers 19 1 ⁇ 19 N is, for example, about 20 ⁇ 120 mm.
  • the hydrostatic chambers 19 1 ⁇ 19 N are supplied with pressure oil O through the capillaries 17.
  • the extended-nip roll 10 shown in Figs. 1A and 1B is otherwise similar to that shown in Figs. 1, 2 and 3 except that, in Figs. 1A and 1B, the hydrostatic chambers 19 1 ⁇ 19 4 ⁇ 19 N of the press shoe are defined by circular arc parts R5, R6, R8 and R9 which define the above-mentioned partition portions 19a.
  • the alternative shaping of the hydrostatic chambers 19 1 ⁇ 19 4 shown in Fig. 1B is advantageous in particular in respect of the durability of the glide belt mantle 16.
  • the ends of the press shoe 11 are provided with walls shown in Fig. 3 defining the hydrostatic chamber.
  • This embodiment uses, however, capillary nozzles 17 which distribute the pressure lubricating oil fairly evenly in the width direction of the machine especially as the length H1 is small, i.e. H1 ⁇ 1 ⁇ 3 mm, although the leakage from the hydrostatic chambers 19 1 ⁇ 19 N at the various points of the press shoe 11 would even vary to some extent because of differences in compression pressure.
  • the right shaping of the hydrostatic chambers 19 1 ⁇ 19 N and their partition walls 19a or their possible removal is advantageous specifically in respect of the durability of the belt 16. Sharp bending of the belt 16 caused by "paper clods" is reduced and pressure peaks are lowered. Also, instances of poorer local lubrication caused by the partition walls 19a of the press shoe 11 and streaks of higher temperature caused by them in the belt 16 may be reduced or totally eliminated.
  • the upper roll 20 is a backup roll of the extended-nip press roll 10, which backup roll may be, for example, a rigid, so-called tube roll or a variable-crown roll provided with a static axle and glide shoes.
  • the backup roll 20 is provided with the drive 24, which comprises an electric motor and a gear which is situated on the driving side of the machine.
  • the lower roll is a hose roll 10 provided with a hose mantle 16 in accordance with the invention, which roll is not provided with a drive.
  • the upper roll 20 and the lower hose roll 10 are connected to each other at their bearing housings 23a,27a and 23b,27b by means of connecting means 27c and 27d which bear a high load and which can be opened in connection with replacement of fabrics.
  • the pressure oil for the loading cylinders 12 of the press shoe 11 and the high-pressure lubricating oil for the static chambers 19 1 ⁇ 19 N of the press shoe 11 are preferably introduced O in from the driving side of the machine.
  • grouping of the loading cylinders 12 and the internal measurements of the extended-nip roll 10 there are totally about 5 ⁇ 40 of these pressure oil tubes, measuring lines for pressure and temperature, and supply lines for an internal air pressure in the extended-nip roll. They are advantageously placed on the driving side of the machine, so that they need not be detached for the time of replacement of the belt mantle 16 or the press fabrics 22.
  • the oil fed into the hose roll 10 is generally drained from the operating side by means of one or two fairly large hoses or tubes 26.
  • a flange joint 26a of said oil-drain hose or tube 26 is opened for removing the tubes out of the path of pushing the fabrics into the machine.
  • Figs. 5 and 6 two particularly advantageous press section geometries are described where the extended-nip roll, i.e. the hose roll 10 in accordance with the invention is applied.
  • the features common to Figs. 5 and 6 are described first.
  • the paper web W is separated from a forming wire 30 at a pick-up point PP and transferred by the action of a suction zone 30a of a pick-up roll on a lower face of a first press felt and a pick-up felt 31 into a first nip N 1 , which is a roll nip N 1 in Fig. 5 and an extended nip EN 1 in Fig. 6.
  • the first roll nip N 1 is formed between an upper press suction roll 29 and a hollow-faced lower press roll 28.
  • the web W and the upper felt 31 travel over a suction zone 29a of the suction roll 29 through a second roll nip N 2 .
  • the second nip N 2 is formed between the press suction roll 29 and a smooth-faced 21 centre roll 20.
  • the first roll nip N 1 is double-felted also comprising a lower felt 32.
  • the second nip N 2 is single-felted and only the upper felt 31 travels through it.
  • the web W adheres to the face of the smooth-faced 21 centre roll 20, and the web W is passed to a first extended nip EN 1 of the press section, through which a water-receiving upper felt 33 travels.
  • a second separate extended nip EN 2 which is provided with a lower felt 34.
  • the web W is separated as a short free draw WP from the face 21 of the centre roll 20 and passed, while guided by a guide roll, by means of a suction zone 37a of a transfer suction roll 37 onto a water-receiving lower felt 34, which runs through the second extended nip EN 2 .
  • the extended nip EN 2 there is a press roll 20 provided with a smooth face 21, from which roll the web W is passed as a short free draw WP, while guided by a guide roll, onto a drying wire 40 and further over drying cylinders 42 and reversing suction cylinders 43 in a multi-cylinder dryer.
  • the press shoe 11 of the hose roll 10 of the invention in the third nip EN 1 is in a lower position.
  • the press section is provided with a separate fourth extended-nip press EN 2 , in which the upper roll 20 is a smooth-faced 21 press roll and the lower roll is a hose roll 10 in accordance with the invention, the press felt loop 34 running around said hose roll.
  • the press shoe 11 of the extended-nip roll 10 in accordance with the invention is in an upper position.
  • both extended nips EN 1 and EN 2 are provided with two felts 31,32/33,34.
  • the upper roll in the first extended nip EN 1 is a press roll 20 provided with a hollow face 21' and the lower roll is an extended-nip roll 10 in accordance with the invention.
  • the web W is separated from an upper felt 31 and transferred by the action of a suction zone 35a of a transfer suction roll 35 onto a lower felt 32 and on it further by means of a suction zone 36a of a transfer suction roll 36 onto a second upper felt 33, which carries the web W into the second extended nip EN 2 .
  • the upper roll in the second extended nip EN 2 is a hose roll 10 in accordance with the invention having a direction of rotation that is opposite to that of the hose roll 10 serving as the lower roll of the first extended nip EN 1 .
  • the press section alternative illustrated in Fig. 6 comprises two extended nips EN 1 and EN 2 having rolls in different positions.
  • the hose roll 10 of the first extended nip EN 1 is in a lower position (the press shoe 11 in the upper position of the hose roll 10) and the hose roll 10 of the second press nip E N2 is in an upper position (the press shoe 11 in the lower position of the hose roll 10).
  • the reason for placing the hose rolls 10 in the different positions in the extended nips EN 1 and EN 2 as shown in Fig. 6 lies in the felt geometries of the press section which take into account the most advantageous transfers of the web W by means of transfer suction rolls 35,36,37 from one press felt 31,32,34 onto another 32,33,34, 40, as well as the angles of the press felts such that, for example, the press felts do not press the belt mantle 16 of the extended-nip press EN 1 ,EN 2 against the leading and trailing edges of the press shoe 11, which would cause sharp bending and reduced durability of the belt mantle 16.
  • the symmetry of paper may also be affected by placing the hose rolls 10 of the invention in different positions especially if smooth belt mantles 16 and hollow-faced 21' backup rolls 20 of the extended-nip press are used.

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  • Paper (AREA)
  • Unwinding Webs (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Claims (11)

  1. Langspaltpressenwalze (10) für eine Papiermaschine mit einer ortsfesten Mittelachse (15), einem Belastungsschuh (11) und hydraulischen Belastungselementen (12), die sich zwischen der ortsfesten Achse (15) und dem Belastungsschuh (11) befinden, wobei durch diese Elemente eine Wirkvorderseite (18) des Belastungsschuhes (11) gegen eine Innenseite eines flexiblen Schlauchmantels (16) der Langspaltpressenwalze (10) gepresst wird, um einen Kompressionsdruck in einer Langspaltzone (EN; EN1; EN2) zu erzeugen, die durch die Langspaltpressenwalze mit ihrer Gegenwalze (20) ausgebildet ist, wobei der Belastungsschuh (11) und die Belastungseinrichtungen des Belastungsschuhes im Wesentlichen symmetrisch in Bezug auf die Axialmittenebene (K-K) der Langspaltpressenwalze sind,
    dadurch gekennzeichnet, dass
       Ölablaufeinrichtungen des Belastungsschuhes, die an'beiden Seiten des Belastungsschuhes innerhalb der Schlauchmantelschleife (16) Ölablaufwannen (13) und Ölablaufröhren (60), die mit diesen verbunden sind, aufweisen, im Wesentlichen symmetrisch in Bezug auf die Axialmittenebene (K-K) der Langspaltpressenwalze (10) sind, so dass die Drehrichtung des Schlauchmantels (16) jede Richtung sein kann und wie erforderlich durch die Position der Langspaltpressenwalze (10) sein kann.
  2. Langspaltpressenwalze gemäß Anspruch 1,
    dadurch gekennzeichnet, dass
       der Belastungsschuh (11) der Langspaltpressenwalze symmetrisch in Bezug auf die Mittenebene (K-K) einer Vorderseitenfläche (A-A), die die Langspaltzone ausbildet, ist, wobei die Ebene (K-K) durch die Mittelachse der Gegenwalze (20) der Langspaltzone oder nahe zu dieser tritt.
  3. Langspaltpressenwalze gemäß Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass
       die Langspaltpressenwalze (10) an beiden Seiten ihrer Axialmittenebene (K-K), befindlich symmetrisch an den Außenrändern, Flächen aufweist, die einen großen Krümmungsradius (R4) haben und die zwischen Stützteilen (14) gestützt sind, die in Verbindung mit der Mittenachse (15) der Langspaltpressenwalze (10) angebracht sind,
       den Seitenteilen (11a, 11b) mit dem Krümmungsradius (R4) Randteile folgen, die einen kleineren Krümmungsradius (R3) haben, wobei sich die Randteile als ebene Teile (A-B) fortsetzen, die einen hydraulischen Keil ausbilden, wobei den ebenen Teilen Teile folgen, die einen Krümmungsradius (R2) haben, der geringfügig größer als der Krümmungsradius (R1) der Gegenwalze (20) ist, wobei sich diese Teile als ebene oder gekrümmte Teile zu der Mittellinie des Belastungsschuhes (11) fortsetzen, wobei an beiden Seiten von ihnen Reihen an Hydraulikbelastungskammern (191 - 19N) vorhanden sind, die symmetrisch angeordnet sind und in die Belastungsöl (O) durch Kapillaren (17) eingeleitet werden kann.
  4. Langspaltpressenwalze gemäß einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass
       an der Vorderseite (18) des Belastungsschuhes (11) der Langspaltwalze (10) eine Reihe an Hydrostatikbelastungsdruckkammern (191 - 19N) vorhanden ist, wobei diese Kammern mit einem Druckmedium mit einem einstellbaren Druck (P), vorzugsweise ein Schmieröl und Belastungsöl, beliefert werden können.
  5. Pressenpartie einer Papiermaschine mit zumindest zwei Langspalten (EN1, EN2),
    dadurch gekennzeichnet, dass
       bei den Langspalten (EN1, EN2) der Pressenpartie Langspaltpressenwalzen (10) gemäß einem der Ansprüche 1 bis 4 an Positionen vorhanden sind, die Drehrichtungen haben, die voneinander unterschiedlich sind, und
    wobei die Langspaltpresswalzen (10) Langspaltzonen (EN1, EN2) mit ihren Gegenwalzen (20) ausbilden, wobei durch diese Zonen die Papierbahn (W) tritt.
  6. Pressenpartie einer Papiermaschine gemäß Anspruch 5,
    dadurch gekennzeichnet, dass
       bei der Pressenpartie ein erster Doppel-Filz-(31, 32)-Spalt ein Walzenspalt (N1) ist, deren oberer Filz (31) ein Aufnahmefilz ist, der außerdem durch einen zweiten Walzenspalt (N2) der Pressenpartie läuft, wobei dieser Spalt zwischen einer Presssaugwalze (29), die gemeinschaftlich für die Pressspalte (N1, N2) ist, und einer mit einer glatten Seite (21) versehenen Mittelwalze (20) ausgebildet ist,
       ein erster Langspalt (EN1) der Pressenpartie außerdem in Verbindung mit der mit einer glatten Seite (21) versehenen Mittelwalze (20) ausgebildet ist, wobei in diesem Spalt eine Langspaltpressenwalze (10) gemäß einem der Ansprüche 1 bis 4 eine obere Walze ist und die Mittelwalze (20) eine untere Walze ist, und wobei durch den Langspalt (EN1) ein Wasser aufnehmender oberer Pressfilz (33) tritt, und
       die Pressenpartie des Weiteren einen zweiten separaten Langspalt (EN2) aufweist, dessen untere Walze eine Langspaltpressenwalze (10) gemäß einem der Ansprüche 1 bis 4 ist und dessen obere Walze eine Presswalze (20) ist.
  7. Pressenpartie einer Papiermaschine gemäß Anspruch 6,
    dadurch gekennzeichnet, dass
       nach dem ersten Langspalt (EN1) die Bahn (W) von der glatten Seite (21) der Mittelwalze (20) getrennt wird und zu der oberen Seite eines unteren Gewebes (34) der zweiten Langspaltzone (EN2) übertragen wird, von der die Bahn (W) nach der zweiten Langspaltzone (EN2) an der Fläche ihrer oberen mit einer glatten Seiten (21) versehenen Pressenwalze (20) getrennt wird und an ihr weiter und vorzugsweise als ein kurzer, freier Zug (WP) weiter zu einem Trocknungssieb (40) einer ersten Trocknungszylindergruppe in einer Trockenpartie übertragen wird, die nach der Pressenpartie folgt.
  8. Pressenpartie einer Papiermaschine gemäß Anspruch 7,
    dadurch gekennzeichnet, dass
       die Pressenpartie zwei aufeinanderfolgende Langspaltzonen (EN1, EN2) aufweist, durch die die Bahn (W) als ein geschlossener Zug tritt.
  9. Pressenpartie einer Papiermaschine gemäß Anspruch 8,
    dadurch gekennzeichnet, dass
       beide Langspaltzonen (EN1, EN2) mit zwei Wasser aufnehmenden Übertragungsgeweben und Pressengeweben oder damit und einem Übertragungsriemen so versehen sind, dass die Bahn (W) einen geschlossenen Zug bei der Übertragung nach den Langspaltzonen (EN1, EN2) und der Pressenpartie zu dem Trocknungssieb (40) hat.
  10. Pressenpartie einer Papiermaschine gemäß Anspruch 9,
    dadurch gekennzeichnet, dass
       das obere Pressengewebe bei dem ersten Langspalt (EN1) der Pressenpartie ein Aufnahmegewebe (31) ist, wobei durch dieses die Bahn (W) an einer Aufnahmestelle (PP) von einem Bahnbildungssieb (30) getrennt wird,
       nach der ersten Langspaltzone (EN1) die Bahn (W), vorzugsweise mittels einer Saugwalzenübertragung (35, 35a), einem unteren Pressengewebe (32) der ersten Langspaltzone (EN1) folgt, wobei an diesem Gewebe die Bahn (W) zu dem oberen Pressengewebe (33) der zweiten Langspaltzone (EN2) mittels einer Saugwalzenübertragung (36, 36a) tritt, und
       nach der zweiten Langspaltzone (EN2) die Bahn (W) so eingerichtet ist, dass sie dem unteren Gewebe (34) oder einem Übertragungsriemen der zweiten Langspaltzone (EN2) folgt, wobei an dem Gewebe oder Riemen die Bahn (W) mittels einer Übertragungssaugzone (41a) einer Übertragungssaugwalze (41) als ein geschlossener Zug zu dem Trocknungssieb (40) der ersten Trocknungszylindergruppe in der Trockenpartie tritt, die nach der Pressenpartie folgt.
  11. Pressenpartie einer Papiermaschine gemäß Anspruch 10,
    dadurch gekennzeichnet, dass
       die erste Langspaltzone (EN1) eine Langspaltpressenwalze (10) gemäß einem der Ansprüche 1 bis 5 als eine untere Pressenwalze und eine mit einer hohlen Seite (21') versehene Pressenwalze (20) als eine obere Pressenwalze hat, und
       die zweite Langspaltzone (EN2) eine Langspaltpressenwalze (10) gemäß einem der Ansprüche 1 bis 5 als eine obere Pressenwalze und eine mit einer hohlen Seite (21') versehene Pressenwalze (20) als eine untere Pressenwalze hat.
EP99906273A 1998-03-04 1999-02-25 Presswalze für eine langspaltpresse und verwendung der walze in einer pressenpartie Expired - Lifetime EP1075564B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI980491 1998-03-04
FI980491A FI111860B (fi) 1998-03-04 1998-03-04 Pitkänippipuristintela ja sitä soveltava paperikoneen puristinosa
PCT/FI1999/000146 WO1999045195A1 (en) 1998-03-04 1999-02-25 Extended-nip press roll and a press section of a paper machine applying it

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Publication Number Publication Date
EP1075564A1 EP1075564A1 (de) 2001-02-14
EP1075564B1 true EP1075564B1 (de) 2003-05-02

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EP (1) EP1075564B1 (de)
AT (1) ATE239130T1 (de)
DE (1) DE69907440T2 (de)
FI (1) FI111860B (de)
WO (1) WO1999045195A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19953474A1 (de) * 1999-11-05 2001-05-10 Voith Paper Patent Gmbh Schuhpresswalze
FI116405B (fi) * 2001-04-02 2005-11-15 Metso Paper Inc Järjestely kuiturainan profiloimiseksi
DE10227979C5 (de) * 2002-06-22 2013-07-25 Voith Patent Gmbh Breitnipvorrichtung und Verfahren zum Satinieren einer Materialbahn
JP4565625B2 (ja) * 2003-12-15 2010-10-20 イチカワ株式会社 抄紙用プレスフェルト及び抄紙用プレス装置
EP2910679B1 (de) 2011-12-07 2017-05-17 Valmet Aktiebolag Eine verlängerte anpresswalze einer papierherstellungsmaschine und verfahren zur herstellung von tissuepapier
EP2839074B1 (de) * 2012-04-19 2016-03-09 Valmet Aktiebolag Walze für eine langspaltpresse, langspaltpresse, papiermaschine und verfahren zum betreiben der langspaltpresse
CN112522984B (zh) * 2020-12-17 2022-06-07 淄博泰鼎机械科技有限公司 一种靴式压榨机

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3503819A1 (de) * 1984-12-21 1986-06-26 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Hydraulischer pressschuh sowie dessen verwendung und betrieb
DE4410129A1 (de) * 1994-03-24 1995-09-28 Kleinewefers Gmbh Preßvorrichtung für bahnförmiges Material
DE4425915A1 (de) * 1994-07-21 1996-02-01 Voith Sulzer Papiermasch Gmbh Langspalt-Presse

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ATE239130T1 (de) 2003-05-15
FI111860B (fi) 2003-09-30
FI980491A0 (fi) 1998-03-04
WO1999045195A1 (en) 1999-09-10
EP1075564A1 (de) 2001-02-14
DE69907440D1 (de) 2003-06-05
FI980491A (fi) 1999-09-05
DE69907440T2 (de) 2004-03-18

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