EP0837183B1 - Arrangement de presse - Google Patents
Arrangement de presse Download PDFInfo
- Publication number
- EP0837183B1 EP0837183B1 EP97116126A EP97116126A EP0837183B1 EP 0837183 B1 EP0837183 B1 EP 0837183B1 EP 97116126 A EP97116126 A EP 97116126A EP 97116126 A EP97116126 A EP 97116126A EP 0837183 B1 EP0837183 B1 EP 0837183B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- press
- plane
- shoe
- running
- carrier
- 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
Links
Images
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
Definitions
- the invention relates to a press arrangement of a paper or board machine for treating a fibrous web in an extended press nip in the running direction of the fibrous web, between a shoe press roll and a counter roll is formed, the shoe press roll one around a rotationally fixed Carrier encircling flexible press jacket, which in Area of the press nip over at least one press shoe Pressure unit is guided by at least one assigned preferably by a respective piston / cylinder unit formed force element is supported on the carrier, the Press jacket outside the area of the press nip at least is guided essentially in a circular cylinder and one in one Plane of symmetry of the carrier arranged carrier axis and the axis of the counter roll in a preferably vertical Lie plane that coincides with the plane of symmetry of the carrier and to which a central plane of the pressure unit, with respect the arrangement of the at least one force element is generally symmetrical, at least substantially parallel is.
- Such a press arrangement is from DE-A-37 08 189 known (preamble of claim
- Such press arrangements are particularly successful used in press sections of paper or board machines.
- the fibrous web to be dewatered is usually together with at least one felt band through the press nip guided.
- the extended in the direction of the fibrous web Press nip has the particular advantage of higher drainage performance with yourself.
- the interior of the outside of the Area of the press nip at least substantially circular cylindrical guided press jacket can be hermetic to the outside be completed, eliminating any risk of contamination excluded by lubricant leaking to the outside is.
- compressed air can enter the interior of the press jacket are supplied, whereby this is inflated, which is a brings improved smoothness of the press shell with it. Is the Press jacket guided through rotatably mounted support disks, this is done together with the compressed air generated internal pressure causes the rotating around the carrier Press jacket only slides over the press shoe and the rest circulates without contact.
- the aim of the invention is to provide a press arrangement at the beginning to create the type mentioned, which is much easier Structure and correspondingly higher reliability high dryness of the escaping from the press nip Fiber web guaranteed.
- the object is achieved according to the invention in that the orbit of the outside of the area of the press nip at least essentially circular cylindrical guided press jacket is concentric to the carrier axis and that the pressing unit with its central plane in the running direction of the fibrous web opposite that through the axis of the counter roll and the carrier axis level is offset.
- the distance between the measured in the area of the press nip Middle plane of the pressure unit and that through the axis of the counter roller and the plane of the carrier axis is advantageous larger than 10 mm, in particular larger than 15 mm, preferably in the range of 20 mm.
- the Press shoe a hydrodynamically facing the press jacket and / or hydrostatically lubricated tread with one the counter roll adapted concave tread portion.
- the tread of the press shoe inlet side with a convex tread section is provided, the radius of curvature of which is greater than 30 mm, in particular is greater than 70 mm, and preferably in the range of 100 mm.
- the radius of curvature is advantageous chosen so that the curvature at least approximately at the circular cylindrical orbit of the press jacket. The danger bulging of the press jacket is practically eliminated. The result is a lower one Press shell expansion on the outside, which is particularly the case thick and double-coated press shrouds an advantage is.
- the enema also less sensitive to transfer chunks.
- the tread of the press shoe is advantageously on the outlet side provided with a convex tread section, whose radius of curvature is greater than 12 mm, in particular larger than 30 mm, and is preferably in the range of 50 mm.
- this is Press shoe assigned at least one pair of force elements, the both preferably by a piston / cylinder unit Force elements formed in the running direction of the fibrous web one after the other and symmetrical to the center plane of the pressure unit are arranged.
- Force elements formed in the running direction of the fibrous web one after the other and symmetrical to the center plane of the pressure unit are arranged.
- the two force elements of a respective pair of force elements preferably in each case taken individually and / or differently relative to each other actable.
- a paper or board machine belonging press assembly 10 is used for treatment a fibrous web 12, here a paper or cardboard web, in a press nip 14 extended in the running direction L.
- This extended press nip 14 is in the illustrated embodiment through a lower and an upper pressing surface limited.
- the press nip 14 is the lower limit Press surface by at least one press shoe 16 guided flexible press jacket 18 a lower shoe press roll 20 formed. Opposite this is to form the upper one
- a cylindrical counter roll 22 is arranged on the pressing surface, which in the present embodiment has a rigid roll shell owns. Basically, however, can also on this Side of the press nip 14 a via at least one press shoe or the like guided press jacket can be provided.
- the flexible press jacket 18 of the lower shoe press roll 20 is through the press shoe 16 to form a fluid cushion between press shoe 16 and press jacket 18 against the opposite, pressing surface formed by the counter roll 22 can be pressed.
- the press shoe 16 is by means of a plurality of each formed by a piston / cylinder unit 24 Force elements can be pressed against the counter-roller 22, which an underlying non-rotatable support 26 of the shoe press roll Support 20 around which the flexible press jacket 18 rotates.
- a drainage felt tape 28 through the press nip 14th performed, in the present case between the shoe press roll 20 and the fibrous web 12 to be treated.
- Basically can also provide multiple drainage felts be, in particular on different pages of the fibrous web 12 to be treated.
- the press shoe 16 and the piston / cylinder units assigned to it 22 are part of a pressure unit 30 which further comprises a stop 32 against which the press shoe 16 is pressed during operation.
- the revolving around the non-rotatable carrier 26 in the area of Press gap 14 over the press shoe 16 guided press jacket 18th is outside the area of the press nip 14 at least in guided essentially circular cylindrical.
- a plane of symmetry S of the carrier 26 arranged carrier axis and also not shown
- the axis of the counter roller 22 are in the present case vertical plane E, which corresponds to the plane of symmetry S of the carrier 26 coincides.
- vertical plane E To this through the axes of the carrier 26th and the counter roll 22 vertical plane E is a Middle plane M of the pressing unit 30, with respect to which the two recognizable in the figure, in the running direction L of the fibrous web 12 pistons / cylinder units in a row 24 are arranged symmetrically, at least essentially parallel.
- the orbit of the outside of the area of the press nip 14 at least essentially circular cylindrical guided press jacket 18 is concentric with the carrier axis.
- the pressure unit 30 with its central plane M in the running direction L Fibrous web 12 opposite that through the axis of the counter roll 22 and the support axis extending plane E.
- the distance a between the center plane M of the pressing unit 30 and that through the axis of the counter roll 22 and the support axis extending plane E is preferably in the present case in the range of 20 mm.
- the pressing unit 30 with its central plane M compared to that through the axis of the counter roll 22 and the carrier axis extending plane E inclined is. In this case it is in the area of the press nip 14 measured distance between the center plane M of the pressure unit 30 and through the axis of the counter roll 22 and the Beam axis extending plane E in the range of 20 mm.
- the press shoe 16 comprises a hydrodynamically facing the press jacket 18 and / or hydrostatically lubricated tread 34 with a concave tread portion adapted to the counter roller 22 36.
- the running surface 34 of the press shoe 16 is on the inlet side a convex tread portion 38, the radius of curvature R1 in the present case preferably in the range of 100 mm.
- the tread 34 of the press shoe 16 is on the outlet side a convex tread portion 40 whose radius of curvature R2 in the present case preferably in the range of 50 mm.
- At least one pair of force elements is assigned to the press shoe 16, both of which are by a piston / cylinder unit 24 force elements formed in the running direction L of the fibrous web 12 are arranged one behind the other. How The two piston / cylinder units are clearly visible in the figure 24 also symmetrical to the central plane M the pressing unit 30 arranged.
- the two piston / cylinder units 24 each comprise one connected to the press shoe 16 piston 42 and a cylinder 44, in which the piston 42 through a respective sealing washer 46 is guided, which is radially displaceable in one respective circumferential groove 48 of the piston 42 in question is.
- the two piston / cylinder units 24 of each Force element pairs are taken individually and / or can be acted upon differently relative to one another, like this is indicated in the figure by the two pressures P1, P2.
- the line of action of the resulting Shoe support force is not fixed.
- the cylinder contact pressure does not form a straight line to the pressing force of the counter roll.
- the resulting shoe support force rather consists of the Piston force and a horizontal thrust component together.
- the Horizontal thrust component acts in addition to that in operation occurring friction force between the press jacket 18 and the Press shoe 16 due to the bending efforts of the press shoe 16 against thermal influences. That is, the press shoe 16 is inevitably in operation with a greater force than that maximum internal bending force pressed against the stop 32 and thus kept straight.
- the press jacket 18 of the shoe press roll 20 can be on the end Support disks are attached, which are concentric to the support axis are rotatably mounted on the carrier.
- E offset pressing unit 30 runs the press jacket 18 immediately after Leaving the press nip 14 relatively steeply downwards, whereby it is achieved that the fibrous web 12th and the felt belt 28 at a minimal distance from the outlet of the Release press nip 14 from each other. The same is true the fibrous web 12 and a possibly provided one upper felt band too. As a result, it is achieved that in Press nip 14 pressed out of the fibrous web 12 into the felt belts Water practically after the discharge from the press nip 14 can no longer flow back into the fibrous web 12.
Landscapes
- Paper (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Press Drives And Press Lines (AREA)
- Glass Compositions (AREA)
Claims (7)
- Dispositif de presse (10) d'une machine à papier ou à carton pour le traitement d'une bande de matière fibreuse (12) dans une fente de pressage (14) prolongée dans le sens de défilement (L) de la bande de matière fibreuse (12), qui est formée entre un rouleau presseur à patin (20) et un contre-rouleau (22), dans lequel le rouleau presseur à patin (20) comprend une enveloppe de pressage souple (18) entourant un support fixe en rotation (26), qui est guidée dans la région de la fente de pressage (14) sur au moins un patin de pressage (16) d'une unité de pressage (30), qui est appuyé sur le support (26) par au moins un élément de force associé (24), formé de préférence par une unité respective de piston/cylindre, l'enveloppe de pressage (18) est guidée au moins de façon essentiellement cylindrique circulaire hors de la région de la fente de pressage (14) et un axe du support disposé dans un plan de symétrie (S) du support (26) et l'axe du contre-cylindre (22) sont situés dans un plan de préférence vertical (E), qui coïncide avec le plan de symétrie (S) du support (26) et auquel un plan médian (M) de l'unité de pressage (30), par rapport auquel la disposition dudit au moins un élément de force (24) est d'une manière générale symétrique, est au moins sensiblement parallèle, caractérisé en ce que la trajectoire de l'enveloppe de pressage (18) guidée au moins de façon essentiellement cylindrique circulaire hors de la région de la fente de pressage (14) est concentrique à l'axe du support et en ce que l'unité de pressage (30) est décalée avec son plan médian (M) dans le sens de défilement (L) de la bande de matière fibreuse (12) par rapport au plan (E) passant par l'axe du contre-cylindre (22) et par l'axe du support.
- Dispositif de presse suivant la revendication 1, caractérisé en ce que la distance (a) mesurée dans la région de la fente de pressage (14) entre le plan médian (M) de l'unité de pressage (30) et le plan (E) passant par l'axe du contre-cylindre (22) et par l'axe du support est supérieure à 10 mm, en particulier supérieure à 15 mm, et se situe de préférence aux alentours de 20 mm.
- Dispositif de presse suivant la revendication 1 ou 2, caractérisé en ce que le patin de pressage (16) comprend une face de roulement (34) tournée vers l'enveloppe de pressage (18), lubrifiée par voie hydrodynamique et/ou hydrostatique, avec une portion de face de roulement concave (36) adaptée au contre-cylindre (22).
- Dispositif de presse suivant la revendication 3, caractérisé en ce que la face de roulement (34) du patin de pressage (16) est pourvue du côté de l'entrée d'une portion de face de roulement convexe (38), dont le rayon de courbure (R1) est supérieur à 30 mm, en particulier supérieur à 70 mm, et se situe de préférence aux alentours de 100 mm.
- Dispositif de presse suivant la revendication 3 ou 4, caractérisé en ce que la face de roulement (34) du patin de pressage (16) est pourvue du côté de la sortie d'une portion de face de roulement convexe (40), dont le rayon de courbure (R2) est supérieur à 12 mm, en particulier supérieur à 30 mm, et se situe de préférence aux alentours de 50 mm.
- Dispositif de presse suivant l'une quelconque des revendications précédentes, caractérisé en ce qu'au moins une paire d'éléments de force sont associés au patin de pressage (16), dont les deux éléments de force (24), formés de préférence chacun par une unité de piston/cylindre, sont disposés l'un derrière l'autre dans le sens de défilement (L) de la bande de matière fibreuse (12) ainsi que symétriquement par rapport au plan médian (M) de l'unité de pressage (30).
- Dispositif de presse suivant la revendication 6, caractérisé en ce que les deux éléments de force (24) de chaque paire d'éléments de force peuvent être actionnés chacun séparément et/ou différemment l'un par rapport à l'autre.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19642401A DE19642401A1 (de) | 1996-10-14 | 1996-10-14 | Pressenanordnung |
DE19642401 | 1996-10-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0837183A1 EP0837183A1 (fr) | 1998-04-22 |
EP0837183B1 true EP0837183B1 (fr) | 2001-11-21 |
Family
ID=7808745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97116126A Expired - Lifetime EP0837183B1 (fr) | 1996-10-14 | 1997-09-17 | Arrangement de presse |
Country Status (6)
Country | Link |
---|---|
US (1) | US6030502A (fr) |
EP (1) | EP0837183B1 (fr) |
JP (1) | JP4331278B2 (fr) |
AT (1) | ATE209272T1 (fr) |
CA (1) | CA2218201C (fr) |
DE (2) | DE19642401A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE516706C2 (sv) * | 1998-12-07 | 2002-02-12 | Metso Paper Karlstad Ab | Skopress i ett viraparti hos en kartong- eller pappersmaskin samt viraparti |
FI991154A0 (fi) * | 1999-05-21 | 1999-05-21 | Sunds Defibrator Pori Oy | Pitkänippipuristin |
DE19953474A1 (de) * | 1999-11-05 | 2001-05-10 | Voith Paper Patent Gmbh | Schuhpresswalze |
DE19955029A1 (de) * | 1999-11-16 | 2001-05-17 | Voith Paper Patent Gmbh | Pressenanordnung |
US6402890B1 (en) * | 1999-12-08 | 2002-06-11 | Metso Paper Karlstad Ab | Method and device for oil evacuation from a shoe press unit |
US7172679B2 (en) * | 1999-12-10 | 2007-02-06 | Metso Paper, Inc. | Press device having an extended press nip for pressing of a travelling paperboard web, and procedure for controlling the pressure curve in the machine direction by such press nip |
ITFI20130106A1 (it) * | 2013-05-09 | 2014-11-10 | Toscotec S P A | Pressa a scarpa. |
DE102019104388A1 (de) * | 2019-02-21 | 2020-08-27 | Voith Patent Gmbh | Schuhpresse |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3030233C2 (de) * | 1980-08-09 | 1988-10-20 | J.M. Voith Gmbh, 7920 Heidenheim | Naßpresse zum Entwässern von Faserbahnen |
DE3102526C2 (de) * | 1981-01-27 | 1985-05-23 | J.M. Voith Gmbh, 7920 Heidenheim | Preßeinrichtung zum Entwässern von Bahnen, insbesondere Papierbahnen |
US4425190A (en) * | 1981-05-26 | 1984-01-10 | Beloit Corporation | Extended nip shoe for a nip in a papermaking machine |
US4427492A (en) * | 1981-05-26 | 1984-01-24 | Beloit Corporation | Extended nip shoe for a nip in a papermaking machine |
US4428797A (en) * | 1981-05-26 | 1984-01-31 | Beloit Corporation | Extended nip shoe for a nip in a papermaking machine |
DE3317456C2 (de) * | 1983-04-02 | 1993-12-02 | Voith Gmbh J M | Bandpreßeinheit zum Entwässern von Faserstoffbahnen |
US4673461A (en) * | 1985-11-25 | 1987-06-16 | Beloit Corporation | Enclosed shoe press with flexible end connections for its annular belt |
DE3708189A1 (de) * | 1987-03-13 | 1988-09-22 | Voith Gmbh J M | Langspalt-walzenpresse |
DE8805966U1 (de) * | 1988-05-05 | 1989-09-07 | J.M. Voith Gmbh, 7920 Heidenheim | Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn, insbesondere Papierbahn |
SE461154B (sv) * | 1988-05-25 | 1990-01-15 | Valmet Paper Machinery Inc | Press med laangt nyp foer pappers- eller kartongmaskiner |
DE4435845C1 (de) * | 1994-10-07 | 1996-01-25 | Voith Sulzer Papiermasch Gmbh | Preßwalze |
US5650048A (en) * | 1996-01-31 | 1997-07-22 | Beloit Technologies, Inc. | Extended nip press with hydraulic pressure equalizer valve |
-
1996
- 1996-10-14 DE DE19642401A patent/DE19642401A1/de not_active Withdrawn
-
1997
- 1997-09-17 DE DE59705464T patent/DE59705464D1/de not_active Expired - Lifetime
- 1997-09-17 EP EP97116126A patent/EP0837183B1/fr not_active Expired - Lifetime
- 1997-09-17 AT AT97116126T patent/ATE209272T1/de active
- 1997-10-13 JP JP27904097A patent/JP4331278B2/ja not_active Expired - Fee Related
- 1997-10-14 CA CA002218201A patent/CA2218201C/fr not_active Expired - Fee Related
- 1997-10-14 US US08/950,075 patent/US6030502A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE19642401A1 (de) | 1998-04-16 |
CA2218201A1 (fr) | 1998-04-14 |
EP0837183A1 (fr) | 1998-04-22 |
ATE209272T1 (de) | 2001-12-15 |
DE59705464D1 (de) | 2002-01-03 |
JPH10131077A (ja) | 1998-05-19 |
JP4331278B2 (ja) | 2009-09-16 |
US6030502A (en) | 2000-02-29 |
CA2218201C (fr) | 2006-12-19 |
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