EP0155465B1 - Nasspresse zum Entwässern einer Warenbahn - Google Patents

Nasspresse zum Entwässern einer Warenbahn Download PDF

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Publication number
EP0155465B1
EP0155465B1 EP85100814A EP85100814A EP0155465B1 EP 0155465 B1 EP0155465 B1 EP 0155465B1 EP 85100814 A EP85100814 A EP 85100814A EP 85100814 A EP85100814 A EP 85100814A EP 0155465 B1 EP0155465 B1 EP 0155465B1
Authority
EP
European Patent Office
Prior art keywords
pressure
elements
pressing elements
row
web
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
Application number
EP85100814A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0155465A1 (de
Inventor
Hans K. Dr.-Ing. Dahl
Herbert Dipl.-Ing. Holik
Rüdiger Dr.-Ing. Kurtz
Wolf-Gunter Ing. Fh Stotz
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.)
Sulzer Escher Wyss GmbH
Original Assignee
Sulzer Escher Wyss 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4189195&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0155465(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sulzer Escher Wyss GmbH filed Critical Sulzer Escher Wyss GmbH
Priority to AT85100814T priority Critical patent/ATE31097T1/de
Publication of EP0155465A1 publication Critical patent/EP0155465A1/de
Application granted granted Critical
Publication of EP0155465B1 publication Critical patent/EP0155465B1/de
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses

Definitions

  • the invention relates to a wet press for dewatering a web with a rotating roller and a pressing device, between which the web is guided together with at least one water-absorbing belt in a press nip along part of the circumference of the roller, the pressing device having at least two pressing elements in the running direction of the web, which exert an increasing pressure in the direction of travel of the material web.
  • Such wet presses are described for example in US-A-3 783 097 or DE-A-31 05 276 and are used for dewatering e.g. B. a paper or cardboard web or another fiber material, the web being guided together with, for example, a water-absorbing felt belt and a water-impermeable press belt through a press nip which is formed by a roller and a plurality of pressing elements which are arranged one behind the other in the running direction of the web.
  • the pressure of the pressure elements lying behind one another increases in the running direction up to a maximum value and is then reduced as quickly as possible to zero in order to avoid rewetting.
  • the pressing elements can be designed as pressure bars extending over the entire width of the web. If the roller deflects during operation, however, there is no guarantee that the pressure devices will exert the same pressure over the entire width of the web. It may also be desirable to vary the pressure on the web across the width of the web. With pressing elements that are designed as continuous strips over the entire width, however, this is only possible with great difficulty. In order to be able to set a pressure that is uniform over the width or a desired pressure profile, it is therefore necessary to divide the pressure elements into a number of pressure elements that are arranged next to one another in a row transverse to the running direction of the web.
  • the invention sets itself the task of avoiding the above-mentioned disadvantages of previously known wet presses and, in particular, of creating a wet press in which a uniform drainage of a web can be achieved over its entire width, in which a uniform pressure or a desired pressure profile can be achieved over the entire width and in which disruptive and undesirable effects of a deflection of the roller during operation are avoided, but an increasing contact pressure in the running direction of the web is maintained.
  • the pressing device consists of at least two rows of pressing elements one behind the other in the running direction, with several pressing elements being arranged next to one another in each row transversely to the running direction of the web so that the pressing elements of one row are offset with respect to the pressing elements of another row are.
  • the individual pressure elements can advantageously be designed as hydrostatic pressure elements which have a piston which can be moved in the pressing direction in a pressure chamber supplied with pressure medium and which carries a pressure element provided with pressure pockets, the pressure pockets being connected to the pressure chamber via channels. In this way, a uniform pressing pressure of all pressure elements over the entire width can be ensured in a particularly simple manner, or a desired pressure profile can be set.
  • the wet press shown in FIG. 1 consists of a roller 1 and a pressing device 2, between which the material web, for example a paper web 3 together with a water-absorbing belt 4, for example a felt belt, and a flexible water-tight pressing belt 5 in a press nip 6 along part A of the rollers Scope is performed.
  • the material web for example a paper web 3 together with a water-absorbing belt 4, for example a felt belt
  • the roller 1 can be designed as a solid, tube or suction roller, or as shown in FIG. 1, as a deflection compensation roller or as a deflection adjustment roller, the roller consisting of a rotating roller jacket 7 and a fixed support 8 and both parts by pressing elements movable in the pressing direction 9 are supported against each other so that the deflection of the roller can be controlled.
  • the pressing elements can be designed in any known manner. Hydrostatic pressure elements, such as are described, for example, in US Pat. No. 3,802,044, have proven to be particularly favorable, a number of such pressure elements being arranged side by side in the axial direction of the roller, that is to say transversely to the paper web.
  • the pressure belt 5 can be designed as an endless belt and runs over several guide rollers 10 with the paper web 3 and the felt belt 4 through the press nip 6. If necessary, the pressure belt 5 can also be designed in the form of a roller shell, so that guide rollers can be dispensed with. However, sufficient flexibility of this roll shell must be ensured.
  • the pressing device 2 consists of a cross member 11 which has two rows of pressure chambers 12 and 13, one behind the other in the running direction, which are supplied with a suitable pressure medium via lines 14 and 15.
  • pressing elements 16 and 17 are used in the transverse direction, which are pressed against the roller 1 by the pressure prevailing in the cylindrical pressure chambers 12 and 13 and dewater the paper web 3 by their contact pressure.
  • these pressing elements 16, 17 can be designed in any suitable form, but the embodiment as hydrostatic pressure elements according to US-A-3 802 044, which have pressure pockets 19 and 20 on their pressing surface with bores 21, has proven to be particularly advantageous are in communication with the pressure rooms 12 and 13.
  • the contact pressure of the contact elements 16, 17 is selected so that the contact pressure increases successively in the running direction of the paper web, i.e. the contact pressure of the contact element 17 is greater than that of the contact element 16.
  • This can be achieved in various ways, for example in that the pressure in the cylindrical pressure chamber 13 is greater than that in the pressure chamber 12, that the cross section of the bores 21 of the contact elements 16 and 17 is different or that the effective pressure area of the pressure elements 17 is smaller than the effective pressure area 19 of the pressure elements 16, or that the cross sections of the pressure spaces 13 of the pressure elements 17 are larger than that of the pressure elements 16. If necessary, a combination of the measures mentioned is also possible.
  • the pressing device 2 shown above in section is shown in plan view.
  • Two rows 16 and 17 of pressing elements are provided one behind the other in the running direction, the individual pressing elements of each row 16 and 17 being arranged closely together in the transverse direction, so that only narrow gaps 22 and 23 are present between adjacent pressing elements.
  • the effective pressure area of the pressure pockets 20 of the rear row of pressure elements 17 as seen in the direction of travel is somewhat smaller than the effective pressure area of the pressure pockets 19 of the front row 16.
  • the pressure applied in each row of pressure elements between the individual adjacent pressure elements 16 and 17 drops, so that the drainage in the unavoidable gaps between the individual pressure elements is less than in the area of the pressure pockets 19 and 20 usually results in a certain undesirable streakiness of the paper produced in this way.
  • the pressing elements 16 and 17 of the two rows are offset from one another and overlap one another.
  • the columns 22 of the rear row 17 are thus in the running direction at the points where there are 16 pressure pockets 19 in the front row, and vice versa, the columns 23 between the pressing elements of the front row 16 are provided exactly at the points where the rear Row 17 pressure pockets 20 are present.
  • FIG. 3 shows a top view of a pressing device in which three rows of pressing elements 16, 17 and 18 are provided.
  • these pressure elements have two pressure pockets 24 and 25, which improves the lateral stability.
  • the individual pressing elements can have several pressure pockets in a row to improve stability, which are connected to the same pressure chamber with separate bores.
  • the pressing elements of the individual rows are arranged close together in the transverse direction, so that only narrow gaps 26, 27 and 28 are formed between the individual pressing elements.
  • these columns 26, 27 and 28 are offset from one another in such a way that the pressing elements of the different rows overlap.
  • the contact pressure in the running direction increases from row to row, ie it gradually increases from row 16 of pressing elements to rows 17 and 18.
  • the contact pressure in the running direction increases from row to row, ie it gradually increases from row 16 of pressing elements to rows 17 and 18.
  • FIG. 4 shows a pressing device 2 in cross-section, a number of pressing elements 16 being provided next to each other in the transverse carrier 11 in the transverse direction, which are movable in the pressing direction in cylindrical pressure chambers 12.
  • the individual pressure chambers 12 are connected to a pressure medium source by means of a common line 14 and are thus supplied with pressure medium with the same pressure. In this way it is achieved that the contact pressure in the transverse direction is constant along the rows of contact elements.
  • a roller is not only to be understood as a relatively rigid solid roller or a more or less rigid hollow roller which is supported on the inside by supporting elements of any design or by rollers, but also a relatively flexible or band-shaped one, also on the inside suitably supported roller jacket.
  • the surface of the pressure elements or pressure pockets can also advantageously be diamond-shaped or parallelogram-shaped instead of square or rectangular, which can further improve the uniformity of the web.

Landscapes

  • Paper (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Amplifiers (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Fiber Materials (AREA)
EP85100814A 1984-02-06 1985-01-26 Nasspresse zum Entwässern einer Warenbahn Expired EP0155465B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85100814T ATE31097T1 (de) 1984-02-06 1985-01-26 Nasspresse zum entwaessern einer warenbahn.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH533/84 1984-02-06
CH53384 1984-02-06

Publications (2)

Publication Number Publication Date
EP0155465A1 EP0155465A1 (de) 1985-09-25
EP0155465B1 true EP0155465B1 (de) 1987-11-25

Family

ID=4189195

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100814A Expired EP0155465B1 (de) 1984-02-06 1985-01-26 Nasspresse zum Entwässern einer Warenbahn

Country Status (6)

Country Link
US (1) US4556454A (enrdf_load_stackoverflow)
EP (1) EP0155465B1 (enrdf_load_stackoverflow)
AT (1) ATE31097T1 (enrdf_load_stackoverflow)
CA (1) CA1234307A (enrdf_load_stackoverflow)
DE (2) DE3408119A1 (enrdf_load_stackoverflow)
FI (1) FI850164A7 (enrdf_load_stackoverflow)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH670217A5 (enrdf_load_stackoverflow) * 1986-06-20 1989-05-31 Escher Wyss Gmbh
DE3683495D1 (de) * 1986-09-03 1992-02-27 Kleinewefers Gmbh Deformationsregelwalze.
DE3705241A1 (de) * 1986-12-24 1988-07-07 Escher Wyss Gmbh Verfahren zur mechanisch-thermischen entwaesserung einer faserstoffbahn
FI76872C (fi) * 1987-02-23 1988-12-12 Valmet Paper Machinery Inc Foerfarande och anordning foer styrning av zonvals.
SE461154B (sv) * 1988-05-25 1990-01-15 Valmet Paper Machinery Inc Press med laangt nyp foer pappers- eller kartongmaskiner
SE461171C (sv) * 1988-05-25 1992-08-17 Valmet Paper Machinery Inc Press med laangt nyp foer pappers- eller kartongmaskiner
US4973384A (en) * 1989-06-23 1990-11-27 Beloit Corporation Heated extended nip press apparatus
US5140897A (en) * 1989-08-09 1992-08-25 Beloit Corporation Extended nip press apparatus
DE4017433A1 (de) * 1989-10-11 1991-04-25 Escher Wyss Gmbh Walzenpresse
FI91789C (fi) * 1989-12-21 1994-08-10 Tampella Oy Ab Paperikoneen pitkävyöhykepuristin
US5389205A (en) * 1990-11-23 1995-02-14 Valmet Paper Machinery, Inc. Method for dewatering of a paper web by pressing using an extended nip shoe pre-press zone on the forming wire
FI98844C (fi) * 1991-12-23 1997-08-25 Valmet Paper Machinery Inc Paperikoneen puristinosa, etenkin painopaperilaaduille
US5639351A (en) 1991-12-23 1997-06-17 Valmet Corporation Press section of a paper machine, in particular for printing paper qualities
DE4319323A1 (de) * 1993-06-11 1993-11-04 Voith Gmbh J M Verfahren zum betreiben einer pressenpartie und vorrichtung zum durchfuehren des verfahrens
DE4409316C1 (de) * 1994-03-18 1995-06-29 Escher Wyss Gmbh Langspaltpressvorrichtung zur Behandlung einer Faserstoffbahn
FI942616L (fi) * 1994-06-03 1995-12-04 Valmet Corp Paperirainan esipuristin
DE4423694C2 (de) * 1994-07-06 2000-03-16 Voith Sulzer Papiermasch Gmbh Langspaltpresse
DE4430268C1 (de) * 1994-08-26 1995-11-02 Kleinewefers Gmbh Durchbiegungssteuerbare Walze für einen Kalander o. dgl.
DE19520443C2 (de) * 1995-06-03 2000-05-31 Voith Sulzer Papiermasch Gmbh Walzenpresse
DE19522761C2 (de) * 1995-06-27 2000-11-16 Voith Sulzer Papiermasch Gmbh Schuh-Preßeinrichtung
DE19544978C2 (de) * 1995-12-01 1998-07-30 Voith Sulzer Papiermasch Gmbh Preßwalze
DE19613878C1 (de) * 1996-04-06 1997-06-12 Voith Sulzer Finishing Gmbh Kalander für Papier o. dgl.
US5709778A (en) * 1996-10-30 1998-01-20 Voith Sulzer Paper Technology North America, Inc. Multiple shoe press for a paper making machine
DE19756422A1 (de) 1997-12-18 1999-06-24 Voith Sulzer Papiertech Patent Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Tissue-Papierbahn
US6875085B2 (en) * 1998-11-06 2005-04-05 Mosel Vitelic, Inc. Polishing system including a hydrostatic fluid bearing support
DE19941336A1 (de) * 1999-08-31 2001-03-01 Voith Paper Patent Gmbh Trocknungsvorrichtung
DE10032251A1 (de) * 2000-07-03 2002-01-17 Voith Paper Patent Gmbh Maschine sowie Verfahren zur Herstellung einer Faserstoffbahn
US6649262B2 (en) 2001-07-06 2003-11-18 Kimberly-Clark Worldwide, Inc. Wet roll having uniform composition distribution
US7101587B2 (en) 2001-07-06 2006-09-05 Kimberly-Clark Worldwide, Inc. Method for wetting and winding a substrate
US6866220B2 (en) 2001-12-21 2005-03-15 Kimberly-Clark Worldwide, Inc. Continuous motion coreless roll winder
JP4779564B2 (ja) 2005-10-18 2011-09-28 王子製紙株式会社 抄紙機のシュープレス装置及び紙の製造方法
US7767060B2 (en) * 2006-03-22 2010-08-03 E. I. Du Pont De Nemours And Company Creping machine
EP2885457B1 (de) * 2012-08-15 2016-07-27 Voith Patent GmbH Walze und verfahren zur herstellung und/oder verarbeitung einer papier-, karton- oder tissuebahn
ITFI20130106A1 (it) * 2013-05-09 2014-11-10 Toscotec S P A Pressa a scarpa.

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2230139B2 (de) * 1971-06-28 1980-01-31 Escher Wyss Ag, Zuerich (Schweiz) Walze mit Durchbiegungsausgleich für die Druckbehandlung von bahnförmigen Materialien
BE793027A (fr) * 1971-12-20 1973-04-16 Beloit Corp Presse controlee
US3783097A (en) * 1972-05-30 1974-01-01 Beloit Corp Hydrodynamically loaded web press with slipper bearing shoes
US3970515A (en) * 1973-11-05 1976-07-20 Beloit Corporation Controlled sequence pressure nip
DE2608646A1 (de) * 1975-10-02 1977-09-08 Escher Wyss Ag Durchbiegungseinstellwalze
AT360831B (de) * 1977-12-20 1981-02-10 Escher Wyss Ag Hydraulisches stuetzelement
AT380907B (de) * 1981-01-27 1986-07-25 Escher Wyss Gmbh Nasspresse mit verlaengertem pressspalt fuer papiermaschinen
FI71979B (fi) * 1981-06-24 1986-11-28 Escher Wyss Ag Pressvals
DE3126492C2 (de) * 1981-06-30 1983-10-20 Escher Wyss AG, Zürich Preßwalze

Also Published As

Publication number Publication date
DE3408119A1 (de) 1985-08-14
ATE31097T1 (de) 1987-12-15
US4556454A (en) 1985-12-03
FI850164A0 (fi) 1985-01-15
CA1234307A (en) 1988-03-22
EP0155465A1 (de) 1985-09-25
FI850164L (fi) 1985-08-07
DE3561077D1 (en) 1988-01-07
FI850164A7 (fi) 1985-08-07
DE3408119C2 (enrdf_load_stackoverflow) 1987-06-19

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