EP2161372A2 - Section de séchage - Google Patents

Section de séchage Download PDF

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Publication number
EP2161372A2
EP2161372A2 EP09167462A EP09167462A EP2161372A2 EP 2161372 A2 EP2161372 A2 EP 2161372A2 EP 09167462 A EP09167462 A EP 09167462A EP 09167462 A EP09167462 A EP 09167462A EP 2161372 A2 EP2161372 A2 EP 2161372A2
Authority
EP
European Patent Office
Prior art keywords
stabilizer
section according
drying section
additional mass
drying
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Withdrawn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
EP09167462A
Other languages
German (de)
English (en)
Other versions
EP2161372A3 (fr
Inventor
Uwe Joos
Christoph Dr. Lapp
Peter Kahl
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 EP2161372A2 publication Critical patent/EP2161372A2/fr
Publication of EP2161372A3 publication Critical patent/EP2161372A3/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Withdrawn legal-status Critical Current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
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices

Definitions

  • the invention relates to a dryer section of a machine for producing and / or treating a fibrous web, in particular paper or board web, in which the fibrous web is guided together with a drying wire around at least one drying cylinder and an adjacent Saugumlenkwalze and the rotating Saugumlenkwalze standing in contact with this non-rotating stabilizer, in particular high-vacuum stabilizer, is assigned to stabilize the web run in the region between the drying cylinder and the Saugumlenkwalze.
  • duo-stabilizers can be provided which are assigned to a suction deflecting roller provided between two drying cylinders and serve both to stabilize the web run between the preceding drying cylinder and the suction deflecting roller and to stabilize the web run between the suction deflecting roller and the subsequent drying cylinder.
  • the installation space for the stabilizer is limited by the geometry between the drying cylinders and the Saugumlenk- or stabilizer roller.
  • the stabilizer body is normally in contact with the suction deflection roller via sealing elements, in particular sealing blades. Based on these Coupling stimulates the Saugumlenkwalze the stabilizer with its own rotation frequency. If the rotational frequency of the roller is in the range of the natural frequency of the stabilizer, then it comes to resonance vibrations. To ensure safe operation, it is imperative to avoid such resonant vibrations of the stabilizer.
  • the stabilizer body is so far regularly designed so that the first natural frequency of the stabilizer system is within a certain distance above the highest excitation frequency.
  • the design of the cross section of the stabilizer body is essential for the achievable rigidity and the resulting natural frequencies of the stabilizer system. In particular, when such stabilizers are to be installed in wider machines with Saugumlenk- or stabilizer rollers smaller diameter, it is no longer possible to integrate the stabilizers with sufficiently high natural frequency in the given geometry.
  • a scraper system comprising a scraper bar, a blade holder and a scraper blade is already known, in which the scraper bar is assigned an additional mass which is connected to the scraper bar in a resilient, oscillating or floating manner.
  • a roller is described in whose central bore an eccentrically arranged balance weight is provided, which is adjustable with respect to its mass and / or angular position and / or with respect to its radial distance to the central axis of the roller. It can be provided between the roller body and the balance weight, a vibration damping element.
  • the invention has for its object to provide an improved dryer section of the type mentioned, in which the aforementioned disadvantages are eliminated. It should be ensured in the simplest and most economical manner, in particular, that the sensitivity of the stabilizer to externally excited vibrations is reduced to a minimum.
  • this object is achieved in that the non-rotating stabilizer in contact with the rotating suction deflecting roller is assigned at least one additional mass, which is resiliently coupled to the stabilizer and / or oscillating and / or floating.
  • the stabilizer may in particular be assigned to a suction deflecting roller provided between two drying cylinders and provided as a duostabilizer, around the web run both in the area between the drying cylinder viewed in the web running direction and the suction deflecting roller and in the region between the suction deflecting roller and the subsequent drying cylinder to stabilize.
  • the Saugumlenkwalze is preferably applied via the stabilizer with vacuum.
  • the additional mass can be arranged inside or outside the stabilizer. If several additional masses are provided, then for example all additional masses within or all additional masses can be arranged outside the stabilizer. However, it is also conceivable to arrange part of the additional masses within and part of the additional mass outside the stabilizer.
  • the additional mass is coupled via a spring or a spring-damper system with the stabilizer.
  • the additional mass is coupled exclusively via this spring or spring damper system with the stabilizer.
  • the suspension can therefore form at least partially even the spring or spring-damper system or be provided in addition to such a spring-damper system, it being necessary in the latter case not necessarily resilient or resilient and damping. Basically, however, here again a resilient or resilient and damping suspension is conceivable.
  • the components of the stabilizer and in particular via a spring or spring damper system coupled with this additional mass comprising multi-mass vibration system are tuned so that the susceptibility to vibration of this multi-mass vibration system in particular determined by the speed of the Saugumlenkwalze critical frequency range to a minimum is.
  • the additional mass advantageously extends over the entire length of the stabilizer. However, in certain cases it may only extend over part of the stabilizer length. It is particularly advantageous if the additional mass extends at least substantially parallel to the stabilizer.
  • the center of gravity of the additional mass or the common center of gravity of the additional masses is preferably in the middle of the stabilizer.
  • the additional mass may be suspended from the stabilizer via the spring or spring damper system and / or via a suspension (28), wherein the additional mass is preferably coupled to the stabilizer exclusively via the at least in this case, itself resilient or resilient and damping suspension ,
  • the suspension can thus form at least partially even the spring or spring and damper system or be provided in addition to a spring or spring damper system. In the latter case, the suspension does not need to be resilient or springy and dampening itself. Basically, however, here is a resilient or resilient and damping embodiment of the suspension conceivable, which may for example only have a damping effect.
  • the additional mass can in principle be provided again inside and / or outside the stabilizer.
  • the multi-mass vibration system according to the invention is preferably used at machine or web speeds> 1400 m / min and preferably> 1500 m / min.
  • the multi-mass vibration system according to the invention has a particularly advantageous effect on slender, long components.
  • the dryer section according to the invention is the ratio defining the slenderness degree between the length and the smallest, measured at average height width of the stabilizer> 10, in particular> 11 and preferably> 12.
  • the ratio between the length and the smallest mid-height measured width of the stabilizer should be ⁇ 18, preferably ⁇ 15.
  • the resulting stabilizer system no longer has the properties of a one-shot oscillator, as it did in the past, but rather that of a multi-mass oscillator, in particular a two-mass oscillator.
  • This is achieved by allocating at least one defined additional mass to the stabilizer.
  • the mass of the stabilizer and the additional mass are coupled to each other in particular via spring and preferably damping elements in such a way that by tuning the components results in a strong reduction in susceptibility to vibration in the critical frequency range.
  • the use of at least one additional mass and at least one spring is conceivable.
  • at least one damping element can be provided.
  • the additional mass is not provided in the manner of a point mass, but designed as an element which preferably extends in the dimensions in the direction of the greatest extent of the mass to be damped, that is in particular of the stabilizer.
  • the focus of the additional mass or the sum of the additional masses is preferably in the middle of the stabilizer body in particular based on its largest extent.
  • the overall system can in particular be tuned such that preferably the first bending natural frequency in the direction of the first main axis of inertia and the first bending frequency in the direction of the second axis of inertia is influenced.
  • the additional mass is preferably in the order of about 5 to about 20% of the total mass of the system to be damped or the total mass of the stabilizer.
  • the additional mass may be suspended in particular via the spring or spring damper system or a part thereof, wherein preferably no further mechanical coupling elements are provided.
  • the additional mass in the interior of the body to be influenced that is arranged in particular in the interior of the stabilizer.
  • the additional mass can be designed in different forms.
  • a spherical shape, a rod shape, a cuboid shape, a cylindrical shape or the shape of a quadrangle comes into consideration.
  • other forms are conceivable.
  • Fig. 1 shows a schematic partial representation of an exemplary embodiment of a dryer section of a machine for producing and / or treating a fibrous web 10, which may be in particular a paper or board web.
  • the drying section comprises at least one suction deflecting or stabilizing roller 16 arranged between two drying cylinders 12, 14, to which a stabilizer 18 is assigned.
  • the fibrous web 10, together with a drying wire 20 is first guided around the drying cylinder 12 preceding it in the web running direction L, then around the suction deflecting roller 16 and finally around the subsequent drying cylinder 14.
  • the preceding drying cylinder 12 may be associated with a scraper 22.
  • the non-rotating stabilizer 18 is in contact with the rotating suction deflection roller 16 via sealing elements 24, which may in particular be elastic sealing blades.
  • the vacuum in the suction deflecting roller 16 can therefore be applied in particular via the stabilizer 18.
  • stabilizer 16 which may in particular be a high-vacuum stabilizer is suitably provided as Duostabilisator to the web running both in the range between the Saugumlenkwalze 16 in the web running direction L preceding drying cylinder 12 and to stabilize the Saugumlenkwalze 16 and in the area between the Saugumlenkwalze 16 and the subsequent drying cylinder 14.
  • the additional is 26 assigned to the non-rotating stabilizer 18 in contact with the rotating suction guide roller 16.
  • This additional mass 26 can now be coupled resiliently and / or oscillating and / or floating with the stabilizer 18.
  • the additional mass 26 is disposed within the stabilizer 18, pendulum suspended by a suspension 28 on this and coupled via a plurality of spring-damper elements 30 comprehensive spring-damping system 32 with the body of the stabilizer 18.
  • the additional mass 26 is coupled in the present case exclusively via the spring-damper system 32 with the stabilizer 18. It is for example also a suspension of the additional mass 26 via the spring-damper system or a part thereof conceivable.
  • the components of the multi-mass vibration system comprising the stabilizer 18 and the additional mass 26 coupled in particular via the spring-damper system 32 or additionally the suspension 28 with this additional mass 26 can be adjusted so that the susceptibility to vibration of this multi-mass vibration system is reduced to a minimum in particular determined by the speed of the Saugumlenkwalze 16 critical frequency range.
  • the additional mass 26 may extend over the entire length or over part of the length of the stabilizer 18. Basically, for example, such a design is conceivable in which the additional mass 26 is longer than the stabilizer 18th
  • the additional mass 2 in the present case has a cylindrical shape. It extends parallel to the longitudinal direction of the stabilizer 18 and thus in the present case in particular also parallel to the Saugumlenkwalze 16 and the two drying cylinders 12, 14th
  • the center of gravity of the additional mass 26 may lie in particular in the middle of the stabilizer 18.
  • the additional mass 26 may be, for example, in the order of about 5 to about 10% of the total mass of the stabilizer 18.
  • the total mass of the stabilizer 18 is understood to mean its mass, including the additional mass 26.
  • the additional mass 26 is coupled in the present case via the spring-damper system 32 to the stabilizer 18 and suspended via an additional suspension 28 on or in the stabilizer 18.
  • the additional mass 26 is also or only via a spring-damper system suspended on or in the stabilizer 18.
  • the inventive multi-mass vibration system is advantageously used at machine or web speeds> 1300 m / min and preferably> 1500 m / min.
  • the multi-mass oscillation system according to the invention has a particularly advantageous effect, in particular even on slender, long components of the paper machine.
  • the additional mass 16 is assigned, for example, to a stabilizer 18
  • the ratio between the length measured here transversely to the machine direction and the smallest width B measured at medium height (cf. Fig. 1 ) of the stabilizer 18 advantageously> 10 or> 14, in particular> 15 and preferably> 16.
  • the ratio between the length and the smallest, measured at average height width B of the stabilizer 18 is suitably ⁇ 30, preferably ⁇ 25.
  • this measured at average height width B of the stabilizer 18 is smaller than the diameter D of the Saugumlenkwalze sixteenth
  • an inlet sealing member 34 may be provided at the upper end of the stabilizer 18.

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  • Paper (AREA)
EP09167462A 2008-09-05 2009-08-07 Section de séchage Withdrawn EP2161372A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810041823 DE102008041823A1 (de) 2008-09-05 2008-09-05 Trockenpartie

Publications (2)

Publication Number Publication Date
EP2161372A2 true EP2161372A2 (fr) 2010-03-10
EP2161372A3 EP2161372A3 (fr) 2011-03-09

Family

ID=41396329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09167462A Withdrawn EP2161372A3 (fr) 2008-09-05 2009-08-07 Section de séchage

Country Status (2)

Country Link
EP (1) EP2161372A3 (fr)
DE (1) DE102008041823A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013000843A1 (fr) 2011-06-28 2013-01-03 Voith Patent Gmbh Dispositif de déshydratation conçu pour une machine pour produire une bande de matière fibreuse à partir d'au moins une suspension de matière fibreuse

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015207284B4 (de) * 2015-04-22 2021-05-27 Voith Patent Gmbh Dichtungselement und Dichtungseinrichtung für eine Bahnstabilisierungseinrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10328557A1 (de) 2003-06-24 2005-01-20 Walzen Irle Gmbh Walze
DE102006049027A1 (de) 2006-10-13 2008-04-17 Voith Patent Gmbh Schabereinrichtung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2152275T3 (es) * 1993-08-06 2001-02-01 Voith Sulzer Papiertech Patent Disposicion para guiar una banda fibrosa en un secadero.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10328557A1 (de) 2003-06-24 2005-01-20 Walzen Irle Gmbh Walze
DE102006049027A1 (de) 2006-10-13 2008-04-17 Voith Patent Gmbh Schabereinrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013000843A1 (fr) 2011-06-28 2013-01-03 Voith Patent Gmbh Dispositif de déshydratation conçu pour une machine pour produire une bande de matière fibreuse à partir d'au moins une suspension de matière fibreuse
DE102011078238A1 (de) 2011-06-28 2013-01-03 Voith Patent Gmbh Entwässerungsvorrichtung für eine Maschine zur Herstellung einer Faserstoffbahn aus wenigstens einer Faserstoffsuspension

Also Published As

Publication number Publication date
EP2161372A3 (fr) 2011-03-09
DE102008041823A1 (de) 2010-03-11

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