EP2080834A1 - Procédé de réduction de l'usure d'une bande mobile sans fin dans une machine destinée à la fabrication de bandes de matières fibreuses et dispositif de traitement d'une bande de matières fibreuses - Google Patents

Procédé de réduction de l'usure d'une bande mobile sans fin dans une machine destinée à la fabrication de bandes de matières fibreuses et dispositif de traitement d'une bande de matières fibreuses Download PDF

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Publication number
EP2080834A1
EP2080834A1 EP08171909A EP08171909A EP2080834A1 EP 2080834 A1 EP2080834 A1 EP 2080834A1 EP 08171909 A EP08171909 A EP 08171909A EP 08171909 A EP08171909 A EP 08171909A EP 2080834 A1 EP2080834 A1 EP 2080834A1
Authority
EP
European Patent Office
Prior art keywords
application
belt
endlessly circulating
conditioning
band
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.)
Withdrawn
Application number
EP08171909A
Other languages
German (de)
English (en)
Inventor
Maria Dröscher
Robert Kling
Norbert Karner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2080834A1 publication Critical patent/EP2080834A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G1/00—Calenders; Smoothing apparatus

Definitions

  • the invention relates to a method for reducing the wear of an endlessly circulating belt, in particular a fabric in a machine for producing fibrous webs having a surface which is guided over a part of their circulation path with a further surface to form a contact area, wherein both surfaces free from contact with a fibrous web.
  • the device described therein is a calendering device comprising two calender rolls which form at least one nip with each other, wherein the fibrous web is passed through the nip with a string.
  • a calendering device comprising two calender rolls which form at least one nip with each other, wherein the fibrous web is passed through the nip with a string.
  • the invention is therefore based on the object, a method for reducing the wear of endless circulating belts in a machine for manufacturing of fibrous webs such that the disadvantages mentioned are avoided and the availability of such bands, in particular when in contact with other movable surfaces, wherein between two operating states with occurring relative movement are possible, can be increased.
  • the solution according to the invention is intended to be characterized by a low design and manufacturing effort.
  • the application of the lubricant to the surfaces takes place in the direction of rotation of these before entering the contact area, so that the lubricant is moved with the surface together with this, in which case it must be ensured that an adhesion between the lubricant and the surface at least up to the contact area is achieved.
  • the order is carried out directly in the contact area, in which case the respective facilities, in particular the surface-forming elements can be used for the order or the order is about this, which is particularly important when forming the other surface on a roller of particular importance can, because here the conditioning agent, in particular lubricant can also be applied over the roll shell.
  • the application of the lubricant can take place continuously. This ensures the assurance always a lubricating film between the contacting surfaces.
  • the job can be carried out by means of a stationary applicator or an adjustable in the direction of the circulation path of the surface and / or adjustable over the width direction applicator or a moving applicator.
  • the former cases are characterized by a fixed storage of the application aggregate.
  • the order is made as a curtain, free jet or direct contact.
  • the curtain application is preferably carried out over an over the entire width of the clothing directed application device.
  • the free-jet application is preferably carried out via nozzle devices, in which case a web-wide nozzle or a plurality of nozzles arranged over the width of the clothing can be provided, which can be controlled individually or in groups. As a result, it is possible to react concretely to the requirements of the application case and to selectively vary the lubricating profile across the width.
  • the third embodiment requires the provision of a movable applicator element, for example in the form of a rotating felt belt, which is brought into operative connection with the corresponding surface on endless belt for application, wherein the belt passes through a drinking device, this after dispensing application medium to the surface new again with application medium soaks.
  • a movable applicator element for example in the form of a rotating felt belt, which is brought into operative connection with the corresponding surface on endless belt for application, wherein the belt passes through a drinking device, this after dispensing application medium to the surface new again with application medium soaks.
  • the device according to the invention is characterized by the features of claim 19.
  • the device for the treatment of webs, in particular fibrous webs in the form of paper, cardboard and tissue webs, with an endlessly circulating band, in particular stringing, with a surface which over a portion of its circulation path another contacted movable surface and is guided to form a contact area, wherein the contacting surfaces are free from contact with the fibrous web, is characterized in that at least one means for applying a lubricant on at least one of the two surfaces is provided.
  • the fabric can be carried out adjusted in terms of their properties to the specific application.
  • the properties essentially relate to the surface texture and the functions of the endless belts.
  • the endless belt can be made variously in terms of surface texture, materials used and physical properties.
  • the endless belt can be porous, this being preferably characterized by a storage volume.
  • the storage volume allows depending on the purpose of at least temporary storage and binding of fluids.
  • the endless belt may further be made permeable or impermeable.
  • in applications in drying devices can thereby escape on the surface of this endless belt deposited air boundary layers in a simple manner.
  • the opposing surfaces of the belt can be made the same or different in their properties.
  • smooth surfaces are used, most preferably with a roughness in the range of Rz: 0.1 ⁇ m to 25 ⁇ m (preferably 1.6 to 16 ⁇ m.
  • Particularly advantageous applications of the solution according to the invention are in use in a device for treating a material web in the form of a drying device or a metal strip calendering device.
  • the drying device comprises at least one drying cylinder, which is covered over a part of its outer circumference by at least one, a contact pressure relative to the drying cylinder pressure hood and wherein the fibrous web together with at least one surface forming endless circulating belt in the form of a gas- and liquid-impermeable fabric and one, the further surface forming dryer fabric belt between the drying cylinder and the pressure hood is guided.
  • the contact area between the two bands is lubricated.
  • the surfaces forming the contact area are preferably formed from the outside of the clothing and the inside of the dryer fabric belt.
  • the covering contacting the pressure hood is formed by a metal band, in particular steel band.
  • the fibrous web runs with a surface immediately above the drying cylinder, while on the other hand preferably a fine dryer wire belt runs.
  • the pressure hood is arranged, in which a fluid medium, in particular water, at a temperature between 40 ° C and 100 ° C flows, wherein instead of the flowing medium and a fixed in the Pressure hood remaining medium can be used, which emits the heat absorbed by the fibrous web via a heat exchanger again.
  • the pressure in the pressure hood is preferably between 0.1 and 10 bar.
  • the drying cylinder is heated with steam whose vapor pressure can be in the range of 3-15 bar, wherein the steam temperature in the range between 100 ° C and 250 ° C, preferably 200 ° C and 230 ° C when using silicone-containing lubricant.
  • the fibrous web is mechanically pressed and compacted at the same time.
  • the steam which escapes when the fibrous web is heated condenses on the wire or belt.
  • means are additionally provided between the pressure hood and the inside of the band, in particular the covering means for at least indirect application of a wear-reducing agent, in particular lubricant between the pressure hood and the inside of the band pointing to this.
  • a wear-reducing agent in particular lubricant between the pressure hood and the inside of the band pointing to this.
  • the means are preferably arranged in front of the inlet of the band in the pressure hood. According to a further advantageous embodiment, these can also be guided by a sealing device between the belt and the pressure hood to increase the functional concentration and saving of components.
  • the device is designed as a calendering device, comprising at least one calendering roll forming calendering rolls, between which the endlessly circulating ribbon is passed with a fibrous web, the further surface is formed by one of the calendering rolls.
  • the surface of the endlessly circulating belt is preferably formed from the inside thereof and the further surface from the outer periphery of the calendering roller arranged inside the endless belt. In this embodiment, the wear is reduced due to a relative movement between the belt and jacket of the calender roll.
  • FIG. 1 illustrates in schematic highly simplified representation of the basic principle of a method according to the invention for reducing the wear of a movable endless circulating belt 1 in the form of a cover 2 of a machine for producing fibrous webs F with a surface 3, with a further movable surface 4 over a part of the circulation path U1 this surface 3 is performed touching together.
  • the further second surface 4 is formed here by another endless circulating belt 5.
  • the endless circulating belts 1, 5 form a loop. The guidance takes place for example via guide rollers, guide rollers or other guide elements not shown here.
  • the region in which the two surfaces 3 and 4 move together touching each other within their respective circulation path, which is here designated by U1 and U2, wherein the movement can be quasi-synchronous or relative to one another, is referred to here as the contact region 6 .
  • the contact region 6 in particular in the region of the inlet into the contact region 6 and the region of the outlet from the contact region 6, the susceptibility of the surfaces 3 and 4 to wear is particularly high.
  • Both surfaces 4 and 3 are designed and arranged such that they are free of contact with a fibrous web F.
  • the formed on the endless circulating belt 5 and the surface 4 opposite surface 7 is carried out in the illustrated case as a fibrous web F supporting surface.
  • the nature of the individual bands 1, 5 can be made different depending on the application and application. This also applies to the materials used.
  • means 8 for applying wear-reducing agents, in particular lubricants are provided on at least one of the relatively or jointly touching surfaces 3 and 4 in order to reduce the wear in the contact region 6.
  • the means 8 can thereby - but not shown here - be arranged directly in the region of the axial extent of the contact area 6, the application must then be done by one of the bands in the contact region of both bands between them, which is a corresponding permeability at least one, the fibrous web F non-supporting band would require.
  • the means 8 are preferably arranged upstream of the contact area, wherein the order takes place on at least one of the surfaces 3 or 4.
  • the means 8 are preferably assigned to the surface 3 before entering the contact region 6.
  • a coordinate system is specified, which is placed on the bands 1, 5 in the installed position and wherein the X direction describes the machine direction MD, while the Y direction of the width direction CD corresponds to the machine direction MD.
  • FIG. 3 illustrates an application of a method according to the invention for reducing the wear of moving endless circulating belts of a machine for the production of fibrous webs using the example of a drying device 21.
  • This comprises a heated drying cylinder 22, over part of its outer circumference 23 by at least one, a contact pressure against the drying cylinder 22 exerting pressure hood 26 is covered and in which the fibrous web F together with at least one endlessly circulatingkowskisiebband 24 and an impermeable fabric 25, which is particularly impermeable to gas and liquids, between the drying cylinder 22 and the pressure hood 26 can be passed.
  • the fabric 25 forms the endless circulating belt 1. This is preferably designed as a metal strip, especially steel strip.
  • the means 8 are in each case arranged in front of the inlet of the respective band 1, 5 or covering 25 in front of the contact area 6 and can, for example, according to one of FIGS. 2a to 2d be executed.
  • the solution according to the invention can also be used in a metal strip calender 34.
  • a metal strip calender 34 comprises a calendering device, comprising two calender rolls 34.1 and 34.2, which together form a smoothing nip 35, through which the fibrous web F is passed with an endlessly circulating band in the form of a covering 2.
  • the fabric 2 is formed here as an endless circulating belt 1 in the form of a metal strip 33. This is gas and liquid impermeable.
  • the metal strip 33 on its side facing away from the fibrous web F outside 36 directed inside 40 with the calender roller 34.2 in contact, which forms the surface 4, between which it can come to the relative movement between the metal strip 33 and the surface 4.
  • the inner side forms the surface 3 and also the sliding surface 9.
  • the means 8 for applying wear-reducing agent are assigned here either the smoothing nip 35 and can preferably be introduced directly into this.
  • the order may further, as in FIG. 5 represented, carried out prior to entry into the smoothing nip 35 on the inside 40 of the metal strip 33 or via one of the calender rolls, in particular the calender roll 34.2.

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  • Treatment Of Fiber Materials (AREA)
EP08171909A 2008-01-09 2008-12-17 Procédé de réduction de l'usure d'une bande mobile sans fin dans une machine destinée à la fabrication de bandes de matières fibreuses et dispositif de traitement d'une bande de matières fibreuses Withdrawn EP2080834A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008000021A DE102008000021A1 (de) 2008-01-09 2008-01-09 Verfahren zur Reduzierung des Verschleißes eines endlos umlaufenden Bandes in einer Maschine zur Herstellung von Faserstoffbahnen und Vorrichtung zur Behandlung einer Faserstoffbahn

Publications (1)

Publication Number Publication Date
EP2080834A1 true EP2080834A1 (fr) 2009-07-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08171909A Withdrawn EP2080834A1 (fr) 2008-01-09 2008-12-17 Procédé de réduction de l'usure d'une bande mobile sans fin dans une machine destinée à la fabrication de bandes de matières fibreuses et dispositif de traitement d'une bande de matières fibreuses

Country Status (2)

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EP (1) EP2080834A1 (fr)
DE (1) DE102008000021A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4482430A (en) 1982-04-01 1984-11-13 Oy. Tampella Ab Extended nip press lubricating system for a paper machine
US6261416B1 (en) 1996-12-23 2001-07-17 Voith Sulzer Papiermaschinen Gmbh Device and method for draining a web
WO2006024695A1 (fr) 2004-09-02 2006-03-09 Metso Paper, Inc. Appareil de transformation de nappe fibreuse comprenant une courroie metallique en boucle
EP1793038A2 (fr) 2005-12-03 2007-06-06 Voith Patent GmbH Dispositif d'étanchéité

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004017806A1 (de) 2004-04-13 2005-10-27 Voith Paper Patent Gmbh Maschine zur Herstellung einer Faserstoffbahn

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4482430A (en) 1982-04-01 1984-11-13 Oy. Tampella Ab Extended nip press lubricating system for a paper machine
US6261416B1 (en) 1996-12-23 2001-07-17 Voith Sulzer Papiermaschinen Gmbh Device and method for draining a web
WO2006024695A1 (fr) 2004-09-02 2006-03-09 Metso Paper, Inc. Appareil de transformation de nappe fibreuse comprenant une courroie metallique en boucle
EP1793038A2 (fr) 2005-12-03 2007-06-06 Voith Patent GmbH Dispositif d'étanchéité

Also Published As

Publication number Publication date
DE102008000021A1 (de) 2009-07-16

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