EP1619299B1 - Extended-nip press - Google Patents
Extended-nip press Download PDFInfo
- Publication number
- EP1619299B1 EP1619299B1 EP05015276A EP05015276A EP1619299B1 EP 1619299 B1 EP1619299 B1 EP 1619299B1 EP 05015276 A EP05015276 A EP 05015276A EP 05015276 A EP05015276 A EP 05015276A EP 1619299 B1 EP1619299 B1 EP 1619299B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- extended
- bearing
- nip press
- press according
- pressure
- 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
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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
Definitions
- the invention relates to a long nip pressing device with a counter roll and a shoe roll for treating a web according to the preamble of claim 1.
- Such devices with a shoe having a printing section are known for treating a web, in particular for dewatering and / or calendering a paper web.
- Out DE 33 17 455 is known a pressing device for dewatering a paper web, in which an elastically deformable tubular jacket runs around a fixed, designed as a hollow carrier support body. The jacket can be pressed by means of a press shoe to a part of the circumference of a counter-roller, whereby an extended in the direction of the jacket extended slot is formed. For clamping the shell in the axial direction, each of its ends is on a rotatable edge disc attached.
- This rests on roller bearings on a bearing ring, which rests axially displaceable, but not rotatable on a bearing sleeve.
- This bearing sleeve is attached to the support body. Compression springs cause a displacement of the bearing ring to the outside and thus a tensioning of the shell.
- EP 0 527 881 B1 known to move the jacket axially relative to the press shoe after a certain period of operation. Such a displacement is sufficient to move away the respective fatigued area of the jacket from the axial edge area of the press shoe.
- the displacement of the shell takes place at a fixed shell end, while the other shell end is self-positioning and thus automatically follows an axial displacement of the fixed shell end.
- the displacement and sheath stress is achieved via additional elements in the form of built-in cylinders. These additional elements not only hinder the structural design but also require additional maintenance.
- the object of the invention is therefore to provide a long-nip pressing device according to the preamble of claim 1, which allows an axial unclamping and method of the jacket to increase its life without additional elements.
- a long-nip pressing device in which a peripheral disk inner part is designed as a cylinder / piston unit.
- the pressure chambers of the double-acting cylinder / piston unit can be supplied with pressure medium and so the edge discs are moved.
- the unclamping of the shell as well as an axial displacement thereof relative to the press shoe can take place with the same functional unit in the form of an integrated cylinder / piston unit.
- the piston of the cylinder / piston unit can be formed by a radially extending extension of the bearing sleeve, while the cylinder can be formed by an annular chamber in the bearing ring.
- the pressure lines are preferably guided via the piston in the pressure chambers to adjust an advantageous pressure fluid flow.
- a displacement of the shell by means of the cylinder / piston unit can be done in discrete steps or in any position.
- an additional locking means may be provided.
- the bearing rings can be designed to be displaceable against a spring preload.
- the lying outside of the jacket sliding track of the bearing ring can be enclosed by a bellows. Pollution is thereby avoided, whereby the maintenance is reduced.
- the invention relates to a long nip pressing device with a shoe roll 1 and a driven counter roll 2, which cooperate in an extended nip 3 for treating a web, in particular a paper web, wherein the device may be part of a papermaking plant.
- the shoe roll 1 comprises a fixed support 4 and a roll shell 5 rotatable about the support 4 and made of a flexible material, e.g. Rubber or plastic.
- the roll shell 5 is tubular and attached with its front ends to rotatably seated on the support 4 edge discs 6, 7, to form a closed shoe roll 1.
- a space 8 between the carrier 4 and roll shell 5 is preferably supplied with compressed air to obtain a cylindrical shape.
- a pressure shoe 9 is provided, which limits the extended nip 3 together with the counter-roller 2.
- the pressure shoe 9 is supported on the support 4 via a support strip made of a plurality of axially spaced-apart hydraulic support elements 10.
- the carrier 4 has roll necks 11, 12 which are mounted in a machine frame 13, 14.
- the rotatable edge discs 6, 7 rest on rolling bearings 15, 16 on a bearing ring 17, 18, which sits on the support 4.
- These edge disk units are formed according to the present invention as follows.
- bearing rings 17, 18 are, as in Fig. 2 and 3 shown axially slidably mounted on the support 4 mounted bearing sleeves 19, 20.
- Bearing ring 17, 18 and bearing sleeve 19, 20 each form an axially and double-acting cylinder / piston unit whose pressure chambers 21, 22 and 23, 24 are connected to pressure lines 25, 26 and 27, 28 for axial movement of the bearing rings 17, 18th relative to the bearing sleeves 19, 20 when exposed to pressure medium.
- the bearing sleeves 19, 20 each form a piston 29, 30 in the form of a radial extension, which seals the two pressure chambers 21, 22 and 23, 24 to each other and via which the pressure lines 25, 26 and 27, 28, preferably laterally guided, in the pressure chambers 21, 22 and 23, 24 end.
- pressure medium chambers 31, 32 may be formed in the bearing sleeves 19, 20 also pressure medium chambers 31, 32 may be formed.
- the pistons 29, 30 cooperate with a respective one of the bearing ring 17, 18 formed annular chamber 33, 34, in which the two pressure chambers 21, 22 and 23, 24 are each formed.
- the jacket 5 By selectively loading the pressure chambers 21, 22 and 23, 24 with pressure medium, the jacket 5 can be stretched out and moved axially.
- a locking device may additionally be provided which, according to FIG Fig. 2
- a latching device 35 which locks with locking lug and locking bushing a shift in discrete steps.
- a lock can be provided in any position.
- springs 36, 37 which support the bearing ring 17, 18 spring biased relative to the machine frame 13, 14. The displacement of the bearing rings 17, 18 is thereby damped or braked.
- the counter roll 2 is according to Fig. 1 customary trained and about bearings 38, 39 rotatably mounted in the machine frame 13, 14.
- FIG. 4 illustrated second embodiment of the invention differs from the embodiment described above in that the bearing rings 17, 18 and the machine frame 13, 14 are each connected via a harmonious extendable sleeve 38.
- the sheath 38 thus forms a bellows, which can follow the displaceability of the bearing rings 17, 18 and thereby covers the path of movement. A deposition of dirt on the movement path on the bearing sleeves 19, 20 is thereby avoided.
- the trainable as a compression or compression spring springs 36, 37 are also protected.
- the use and functionality of the shell 38 is ensured in the same way when using other means for tensioning the shell in the axial direction, such as in DE 33 17 455 or EP 0 527 881 described.
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- Paper (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Glass Compositions (AREA)
- Nonmetallic Welding Materials (AREA)
- Polarising Elements (AREA)
Abstract
Description
Die Erfindung betrifft eine Langspaltpressvorrichtung mit einer Gegenwalze und einer Schuhwalze zum Behandeln einer Warenbahn nach dem Oberbegriff des Anspruchs 1.The invention relates to a long nip pressing device with a counter roll and a shoe roll for treating a web according to the preamble of
Derartige Vorrichtungen mit einer eine Druckpartie aufweisenden Schuhwalze sind zum Behandeln einer Warenbahn, insbesondere zum Entwässern und/oder Kalandrieren einer Papierbahn, bekannt. Aus
Um die Lebensdauer des Mantels zu erhöhen, ist ferner aus
Aufgabe der Erfindung ist es daher, eine Langspaltpressvorrichtung nach dem Oberbegriff des Anspruchs 1 zu schaffen, die ohne Zusatzelemente ein axiales Ausspannen und Verfahren des Mantels zur Erhöhung seiner Lebensdauer erlaubt.The object of the invention is therefore to provide a long-nip pressing device according to the preamble of
Diese Aufgabe wird durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst.This object is solved by the features of the characterizing part of
Hierdurch wird eine Langspaltpressvorrichtung geschaffen, bei der ein Randscheibeninnenteil als Zylinder/Kolbeneinheit ausgebildet ist. Über eine Druckmittelversorgung können die Druckräume der doppelt wirkenden Zylinder/Kolbeneinheit mit Druckmittel versorgt und so die Randscheiben bewegt werden. Das Ausspannen des Mantels als auch eine axiale Verschiebung desselben gegenüber dem Preßschuh kann mit der gleichen Funktionseinheit in Form einer integrierten Zylinder/Kolbeneinheit erfolgen.As a result, a long-nip pressing device is provided, in which a peripheral disk inner part is designed as a cylinder / piston unit. About a pressure medium supply, the pressure chambers of the double-acting cylinder / piston unit can be supplied with pressure medium and so the edge discs are moved. The unclamping of the shell as well as an axial displacement thereof relative to the press shoe can take place with the same functional unit in the form of an integrated cylinder / piston unit.
Dabei kann der Kolben der Zylinder/Kolbeneinheit von einem radial sich erstreckenden Fortsatz der Lagerhülse gebildet sein, während der Zylinder von einer Ringkammer in dem Lagerring gebildet werden kann. Die Druckleitungen werden vorzugsweise über den Kolben in die Druckräume geführt, um einen vorteilhaften Druckmittelfluß einzustellen. Eine Verschiebung des Mantels mittels der Zylinder/Kolbeneinheit kann in diskreten Schritten oder in beliebigen Positionen erfolgen.In this case, the piston of the cylinder / piston unit can be formed by a radially extending extension of the bearing sleeve, while the cylinder can be formed by an annular chamber in the bearing ring. The pressure lines are preferably guided via the piston in the pressure chambers to adjust an advantageous pressure fluid flow. A displacement of the shell by means of the cylinder / piston unit can be done in discrete steps or in any position.
Zur Arretierung einer feststehenden Randscheibe kann ein zusätzliches Rastmittel vorgesehen sein.For locking a fixed edge disk, an additional locking means may be provided.
Zur Dämpfung als auch zum Abbremsen des Verfahrens des Mantels können die Lagerringe gegen eine Federvorspannung verschiebbar ausgebildet sein.For damping and for decelerating the method of the shell, the bearing rings can be designed to be displaceable against a spring preload.
Die außerhalb des Mantels liegende Verschiebebahn des Lagerringes kann durch einen Balg umschlossen sein. Eine Verschmutzung wird dadurch vermieden, wodurch der Wartungsaufwand reduziert wird.The lying outside of the jacket sliding track of the bearing ring can be enclosed by a bellows. Pollution is thereby avoided, whereby the maintenance is reduced.
Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung und den Unteransprüchen zu entnehmen.Further embodiments of the invention are described in the following description and the dependent claims.
Die Erfindung wird nachstehend anhand des in den beigefügten Abbildungen dargestellten Ausführungsbeispiels der Erfindung näher erläutert.
-
Fig. 1 zeigt schematisch und teilweise geschnitten eine Seitenansicht einer Langspaltpressvorrichtung, -
Fig. 2 zeigt vergrößert einen Teillängsschnitt einer Langspaltpressvorrichtung gemäß der Erfindung im Bereich einer Randscheibeneinheit des einen Mantelendes gemäß einem ersten Ausführungsbeispiel, -
Fig. 3 zeigt vergrößert einen Teillängsschnitt einer Langspaltpressvorrichtung gemäß der Erfindung im Bereich einer Randscheibeneinheit des gegenüberFig. 2 anderen Mantelendes, -
Fig. 4 zeigt einen Teillängsschnitt einer Langspaltpressvorrichtung gemäß der Erfindung im Bereich einer Randscheibeneinheit des anderen Mantelendes gemäß einem zweiten Ausführungsbeispiel.
-
Fig. 1 shows schematically and partially in section a side view of an extended-nip pressing device, -
Fig. 2 3 shows an enlarged partial longitudinal section of an extended nip press device according to the invention in the region of an edge disk unit of the one end of the jacket according to a first exemplary embodiment, -
Fig. 3 shows enlarged a partial longitudinal section of a long nip pressing device according to the invention in the region of an edge disk unit of the oppositeFig. 2 other coat finish, -
Fig. 4 shows a partial longitudinal section of a long nip pressing device according to the invention in the region of an edge disk unit of the other sheath end according to a second embodiment.
Die Erfindung betrifft eine Langspaltpressvorrichtung mit einer Schuhwalze 1 und einer angetriebenen Gegenwalze 2, die in einem Langspalt 3 zusammenwirken zum Behandeln einer Warenbahn, insbesondere einer Papierbahn, wobei die Vorrichtung Teil einer Papierherstellungsanlage sein kann.The invention relates to a long nip pressing device with a
Die Schuhwalze 1 umfaßt einen feststehenden Träger 4 und einen um den Träger 4 drehbaren Walzenmantel 5, der aus einem flexiblen Material, z.B. Gummi oder Kunststoff, besteht. Der Walzenmantel 5 ist schlauchförmig ausgebildet und mit seinen stirnseitigen Enden an drehbar auf dem Träger 4 sitzenden Randscheiben 6, 7 befestigt, um eine geschlossene Schuhwalze 1 zu bilden. Einem Zwischenraum 8 zwischen Träger 4 und Walzenmantel 5 wird vorzugsweise Druckluft zugeführt, um eine zylindrische Form zu erhalten.The
An dem Träger 4 ist ein Druckschuh 9 vorgesehen, der zusammen mit der Gegenwalze 2 den Langspalt 3 begrenzt. Der Druckschuh 9 ist über eine Stützleiste aus einer Mehrzahl axial beabstandet zueinander angeordneter hydraulischer Stützelemente 10 am Träger 4 abgestützt.On the
Der Träger 4 besitzt Walzenzapfen 11, 12, die in einem Maschinengestell 13, 14 gelagert sind. Die drehbaren Randscheiben 6, 7 ruhen über Wälzlager 15, 16 auf einem Lagerring 17, 18, der auf dem Träger 4 sitzt. Diese Randscheibeneinheiten sind gemäß der vorliegenden Erfindung wie folgt ausgebildet.The
Die Lagerringe 17, 18 sind, wie in
Die Lagerhülsen 19, 20 bilden jeweils einen Kolben 29, 30 in Form eines radialen Fortsatzes aus, der die beiden Druckräume 21, 22 und 23, 24 zueinander abdichtet und über den die Druckleitungen 25, 26 und 27, 28, vorzugsweise seitlich geführt, in den Druckräumen 21, 22 und 23, 24 enden. In den Lagerhülsen 19, 20 können zudem Druckmediumkammern 31, 32 ausgebildet sein. Die Kolben 29, 30 wirken zusammen mit jeweils einer am Lagerring 17, 18 ausgebildeten Ringkammer 33, 34, in der die beiden Druckräume 21, 22 und 23, 24 jeweils ausgebildet sind.The bearing sleeves 19, 20 each form a
Durch wahlweise Beaufschlagung der Druckräume 21, 22 und 23, 24 mit Druckmedium kann der Mantel 5 ausgespannt als auch axial verfahren werden.By selectively loading the
Zur Ausbildung einer feststehenden Randscheibe 6 kann zusätzlich eine Arretiereinrichtung vorgesehen sein, die gemäß
Vorgesehen sind ferner vorzugsweise Federn 36, 37, die den Lagerring 17, 18 federvorgespannt gegenüber dem Maschinengestell 13, 14 abstützen. Die Verschiebung der Lagerringe 17, 18 wird dadurch gedämpft bzw. abgebremst.Provided are also preferably
Die Gegenwalze 2 ist gemäß
Das in
Der Einsatz und die Funktionalität der Hülle 38 ist in gleicher Weise gewährleistet bei Verwendung anderer Mittel zum Spannen des Mantels in Achsrichtung, wie beispielsweise in
Claims (10)
- Extended-nip press comprising a mating roll (2) and a shoe roll (1) for treating a product web, in particular a paper web, the shoe roll (1) having a stationary support (4) and a flexible roll cover (5) which can rotate around the support (4) and which, in the region of the extended nip (3), is supported on a pressure shoe (9) arranged on the support (4) and whose ends are fixed on both sides in antifriction-mounted rim discs (6, 7) which are mounted via axially displaceable bearing rings (17, 18) on bearing sleeves (19, 20) fixed on the support (4), characterized in that bearing sleeve (19, 20) and bearing ring (17, 18) in each case form an axially and double-acting cylinder/piston unit, whose pressure chambers (21, 22; 23, 24) are connected to pressure lines (25, 26; 27, 28) for an ability to move the bearing rings (17, 18) axially when pressure medium is applied.
- Extended-nip press according to claim 1, characterized in that a piston (29, 30) is formed on the bearing sleeve (19, 20) and divides an annular chamber (33, 34) formed on the bearing ring (17, 18) into two pressure chambers (21, 22; 23, 24).
- Extended-nip press according to claim 2, characterized in that the pressure lines (25, 26; 27; 28) open into the pressure chambers (21, 22; 23, 24) via the piston (29, 30).
- Extended-nip press according to claim 3, characterized in that the pressure lines (25, 26; 27, 28) emerge laterally at the piston (29, 30).
- Extended-nip press according to one of claims 1 to 4, characterized in that, in order to construct a stationary rim disc (6), a locking apparatus (35) is provided which fixes one of the bearing rings (18).
- Extended-nip press according to claim 5, characterized in that the looking apparatus (35) is designed to lock a bearing ring (18) in discrete steps.
- Extended-nip press according to claim 5, characterized in that the locking apparatus is designed to lock a bearing ring in any desired positions between two end positions.
- Extended-nip press according to one of claims 1 to 7, characterized in that the bearing rings (17, 18) are arranged such that they can be moved axially counter to a spring prestress in order to develop incorporated damping.
- Extended-nip press according to claim 8, characterized in that the spring prestress can be formed by a spring (36, 37) arranged between the respective bearing ring (17, 18) and a machine frame (13, 14).
- Extended-nip press according to claims 1 to 9, characterized in that the bearing ring (17, 18) and the machine frame (13, 14) are connected by a sheath (38) that can be pulled out in the manner of an accordion.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004035092 | 2004-07-20 | ||
DE200420013639 DE202004013639U1 (en) | 2004-09-01 | 2004-09-01 | Shoe press roller, forming a long press gap with a counter roller at a papermaking machine, has end disks supporting the flexible mantle on the carrier riding on bearing rings at the roller journal with an axial sliding movement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1619299A1 EP1619299A1 (en) | 2006-01-25 |
EP1619299B1 true EP1619299B1 (en) | 2009-03-11 |
Family
ID=35063028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05015276A Not-in-force EP1619299B1 (en) | 2004-07-20 | 2005-07-14 | Extended-nip press |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1619299B1 (en) |
JP (1) | JP2006028728A (en) |
AT (1) | ATE425301T1 (en) |
CA (1) | CA2512007A1 (en) |
DE (1) | DE502005006788D1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3733962A1 (en) | 2019-04-29 | 2020-11-04 | Valmet Technologies Oy | Shoe roll end module |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI120837B (en) | 2005-10-07 | 2010-03-31 | Vaahto Oy | Hardware with press roll and press roll |
EP3733961B1 (en) | 2019-04-29 | 2024-07-24 | Valmet Technologies Oy | Shoe roller end module and method to assemble a shoe roller end module |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3317455A1 (en) | 1983-05-13 | 1984-11-15 | J.M. Voith Gmbh, 7920 Heidenheim | PRESSING DEVICE, IN PARTICULAR FOR DRAINING A PAPER RAIL |
DE3317457A1 (en) * | 1983-05-13 | 1984-11-15 | J.M. Voith Gmbh, 7920 Heidenheim | Pressing device for material in strip form, in particular for dewatering a web of paper |
SE464922B (en) | 1990-05-08 | 1991-07-01 | Valmet Paper Machinery Inc | PRESS ROLL |
-
2005
- 2005-07-14 DE DE502005006788T patent/DE502005006788D1/en active Active
- 2005-07-14 AT AT05015276T patent/ATE425301T1/en not_active IP Right Cessation
- 2005-07-14 CA CA002512007A patent/CA2512007A1/en not_active Abandoned
- 2005-07-14 EP EP05015276A patent/EP1619299B1/en not_active Not-in-force
- 2005-07-20 JP JP2005209805A patent/JP2006028728A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3733962A1 (en) | 2019-04-29 | 2020-11-04 | Valmet Technologies Oy | Shoe roll end module |
Also Published As
Publication number | Publication date |
---|---|
CA2512007A1 (en) | 2006-01-20 |
ATE425301T1 (en) | 2009-03-15 |
EP1619299A1 (en) | 2006-01-25 |
DE502005006788D1 (en) | 2009-04-23 |
JP2006028728A (en) | 2006-02-02 |
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